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qpdf/libqpdf/QPDFJob.cc
Jay Berkenbilt e34dbbfa18 Spell check
2022-05-01 12:56:22 -04:00

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#include <qpdf/QPDFJob.hh>
#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <ctype.h>
#include <fcntl.h>
#include <iostream>
#include <memory>
#include <qpdf/ClosedFileInputSource.hh>
#include <qpdf/FileInputSource.hh>
#include <qpdf/Pl_Count.hh>
#include <qpdf/Pl_DCT.hh>
#include <qpdf/Pl_Discard.hh>
#include <qpdf/Pl_Flate.hh>
#include <qpdf/Pl_StdioFile.hh>
#include <qpdf/QTC.hh>
#include <qpdf/QUtil.hh>
#include <qpdf/QIntC.hh>
#include <qpdf/QPDF.hh>
#include <qpdf/QPDFAcroFormDocumentHelper.hh>
#include <qpdf/QPDFArgParser.hh>
#include <qpdf/QPDFCryptoProvider.hh>
#include <qpdf/QPDFEmbeddedFileDocumentHelper.hh>
#include <qpdf/QPDFExc.hh>
#include <qpdf/QPDFOutlineDocumentHelper.hh>
#include <qpdf/QPDFPageDocumentHelper.hh>
#include <qpdf/QPDFPageLabelDocumentHelper.hh>
#include <qpdf/QPDFPageObjectHelper.hh>
#include <qpdf/QPDFSystemError.hh>
#include <qpdf/QPDFUsage.hh>
#include <qpdf/QPDFWriter.hh>
#include <qpdf/auto_job_schema.hh> // JOB_SCHEMA_DATA
namespace
{
class ImageOptimizer: public QPDFObjectHandle::StreamDataProvider
{
public:
ImageOptimizer(
QPDFJob& o,
size_t oi_min_width,
size_t oi_min_height,
size_t oi_min_area,
QPDFObjectHandle& image);
virtual ~ImageOptimizer() = default;
virtual void
provideStreamData(int objid, int generation, Pipeline* pipeline);
std::shared_ptr<Pipeline>
makePipeline(std::string const& description, Pipeline* next);
bool evaluate(std::string const& description);
private:
QPDFJob& o;
size_t oi_min_width;
size_t oi_min_height;
size_t oi_min_area;
QPDFObjectHandle image;
};
class DiscardContents: public QPDFObjectHandle::ParserCallbacks
{
public:
virtual ~DiscardContents() = default;
virtual void
handleObject(QPDFObjectHandle)
{
}
virtual void
handleEOF()
{
}
};
struct QPDFPageData
{
QPDFPageData(
std::string const& filename, QPDF* qpdf, std::string const& range);
QPDFPageData(QPDFPageData const& other, int page);
std::string filename;
QPDF* qpdf;
std::vector<QPDFObjectHandle> orig_pages;
std::vector<int> selected_pages;
};
class ProgressReporter: public QPDFWriter::ProgressReporter
{
public:
ProgressReporter(
std::ostream& cout,
std::string const& prefix,
char const* filename) :
cout(cout),
prefix(prefix),
filename(filename)
{
}
virtual ~ProgressReporter() = default;
virtual void reportProgress(int);
private:
std::ostream& cout;
std::string prefix;
std::string filename;
};
} // namespace
ImageOptimizer::ImageOptimizer(
QPDFJob& o,
size_t oi_min_width,
size_t oi_min_height,
size_t oi_min_area,
QPDFObjectHandle& image) :
o(o),
oi_min_width(oi_min_width),
oi_min_height(oi_min_height),
oi_min_area(oi_min_area),
image(image)
{
}
std::shared_ptr<Pipeline>
ImageOptimizer::makePipeline(std::string const& description, Pipeline* next)
{
std::shared_ptr<Pipeline> result;
QPDFObjectHandle dict = image.getDict();
QPDFObjectHandle w_obj = dict.getKey("/Width");
QPDFObjectHandle h_obj = dict.getKey("/Height");
QPDFObjectHandle colorspace_obj = dict.getKey("/ColorSpace");
if (!(w_obj.isNumber() && h_obj.isNumber())) {
if (!description.empty()) {
o.doIfVerbose([&](std::ostream& cout, std::string const& prefix) {
cout << prefix << ": " << description
<< ": not optimizing because image dictionary"
<< " is missing required keys" << std::endl;
});
}
return result;
}
QPDFObjectHandle components_obj = dict.getKey("/BitsPerComponent");
if (!(components_obj.isInteger() && (components_obj.getIntValue() == 8))) {
QTC::TC("qpdf", "QPDFJob image optimize bits per component");
if (!description.empty()) {
o.doIfVerbose([&](std::ostream& cout, std::string const& prefix) {
cout << prefix << ": " << description
<< ": not optimizing because image has other than"
<< " 8 bits per component" << std::endl;
});
}
return result;
}
// Files have been seen in the wild whose width and height are
// floating point, which is goofy, but we can deal with it.
JDIMENSION w = 0;
if (w_obj.isInteger()) {
w = w_obj.getUIntValueAsUInt();
} else {
w = static_cast<JDIMENSION>(w_obj.getNumericValue());
}
JDIMENSION h = 0;
if (h_obj.isInteger()) {
h = h_obj.getUIntValueAsUInt();
} else {
h = static_cast<JDIMENSION>(h_obj.getNumericValue());
}
std::string colorspace =
(colorspace_obj.isName() ? colorspace_obj.getName() : std::string());
int components = 0;
J_COLOR_SPACE cs = JCS_UNKNOWN;
if (colorspace == "/DeviceRGB") {
components = 3;
cs = JCS_RGB;
} else if (colorspace == "/DeviceGray") {
components = 1;
cs = JCS_GRAYSCALE;
} else if (colorspace == "/DeviceCMYK") {
components = 4;
cs = JCS_CMYK;
} else {
QTC::TC("qpdf", "QPDFJob image optimize colorspace");
if (!description.empty()) {
o.doIfVerbose([&](std::ostream& cout, std::string const& prefix) {
cout << prefix << ": " << description
<< ": not optimizing because qpdf can't optimize"
<< " images with this colorspace" << std::endl;
});
}
return result;
}
if (((this->oi_min_width > 0) && (w <= this->oi_min_width)) ||
((this->oi_min_height > 0) && (h <= this->oi_min_height)) ||
((this->oi_min_area > 0) && ((w * h) <= this->oi_min_area))) {
QTC::TC("qpdf", "QPDFJob image optimize too small");
if (!description.empty()) {
o.doIfVerbose([&](std::ostream& cout, std::string const& prefix) {
cout << prefix << ": " << description
<< ": not optimizing because image"
<< " is smaller than requested minimum dimensions"
<< std::endl;
});
}
return result;
}
result = std::make_shared<Pl_DCT>("jpg", next, w, h, components, cs);
return result;
}
bool
ImageOptimizer::evaluate(std::string const& description)
{
if (!image.pipeStreamData(0, 0, qpdf_dl_specialized, true)) {
QTC::TC("qpdf", "QPDFJob image optimize no pipeline");
o.doIfVerbose([&](std::ostream& cout, std::string const& prefix) {
cout << prefix << ": " << description
<< ": not optimizing because unable to decode data"
<< " or data already uses DCT" << std::endl;
});
return false;
}
Pl_Discard d;
Pl_Count c("count", &d);
std::shared_ptr<Pipeline> p = makePipeline(description, &c);
if (p.get() == nullptr) {
// message issued by makePipeline
return false;
}
if (!image.pipeStreamData(p.get(), 0, qpdf_dl_specialized)) {
return false;
}
long long orig_length = image.getDict().getKey("/Length").getIntValue();
if (c.getCount() >= orig_length) {
QTC::TC("qpdf", "QPDFJob image optimize no shrink");
o.doIfVerbose([&](std::ostream& cout, std::string const& prefix) {
cout << prefix << ": " << description
<< ": not optimizing because DCT compression does not"
<< " reduce image size" << std::endl;
});
return false;
}
o.doIfVerbose([&](std::ostream& cout, std::string const& prefix) {
cout << prefix << ": " << description
<< ": optimizing image reduces size from " << orig_length << " to "
<< c.getCount() << std::endl;
});
return true;
}
void
ImageOptimizer::provideStreamData(int, int, Pipeline* pipeline)
{
std::shared_ptr<Pipeline> p = makePipeline("", pipeline);
if (p.get() == nullptr) {
// Should not be possible
image.warnIfPossible("unable to create pipeline after previous"
" success; image data will be lost");
pipeline->finish();
return;
}
image.pipeStreamData(p.get(), 0, qpdf_dl_specialized, false, false);
}
QPDFJob::PageSpec::PageSpec(
std::string const& filename,
char const* password,
std::string const& range) :
filename(filename),
range(range)
{
if (password) {
this->password = QUtil::make_shared_cstr(password);
}
}
QPDFPageData::QPDFPageData(
std::string const& filename, QPDF* qpdf, std::string const& range) :
filename(filename),
qpdf(qpdf),
orig_pages(qpdf->getAllPages())
{
try {
this->selected_pages = QUtil::parse_numrange(
range.c_str(), QIntC::to_int(this->orig_pages.size()));
} catch (std::runtime_error& e) {
throw std::runtime_error(
"parsing numeric range for " + filename + ": " + e.what());
}
}
QPDFPageData::QPDFPageData(QPDFPageData const& other, int page) :
filename(other.filename),
qpdf(other.qpdf),
orig_pages(other.orig_pages)
{
this->selected_pages.push_back(page);
}
void
ProgressReporter::reportProgress(int percentage)
{
this->cout << prefix << ": " << filename
<< ": write progress: " << percentage << "%" << std::endl;
}
// These default values are duplicated in help and docs.
static int constexpr DEFAULT_KEEP_FILES_OPEN_THRESHOLD = 200;
static int constexpr DEFAULT_OI_MIN_WIDTH = 128;
static int constexpr DEFAULT_OI_MIN_HEIGHT = 128;
static int constexpr DEFAULT_OI_MIN_AREA = 16384;
static int constexpr DEFAULT_II_MIN_BYTES = 1024;
QPDFJob::Members::Members() :
message_prefix("qpdf"),
warnings(false),
cout(&std::cout),
cerr(&std::cerr),
encryption_status(0),
verbose(false),
password(0),
linearize(false),
decrypt(false),
split_pages(0),
progress(false),
suppress_warnings(false),
warnings_exit_zero(false),
copy_encryption(false),
encryption_file_password(0),
encrypt(false),
password_is_hex_key(false),
suppress_password_recovery(false),
password_mode(pm_auto),
allow_insecure(false),
allow_weak_crypto(false),
keylen(0),
r2_print(true),
r2_modify(true),
r2_extract(true),
r2_annotate(true),
r3_accessibility(true),
r3_extract(true),
r3_assemble(true),
r3_annotate_and_form(true),
r3_form_filling(true),
r3_modify_other(true),
r3_print(qpdf_r3p_full),
force_V4(false),
force_R5(false),
cleartext_metadata(false),
use_aes(false),
stream_data_set(false),
stream_data_mode(qpdf_s_compress),
compress_streams(true),
compress_streams_set(false),
recompress_flate(false),
recompress_flate_set(false),
compression_level(-1),
decode_level(qpdf_dl_generalized),
decode_level_set(false),
normalize_set(false),
normalize(false),
suppress_recovery(false),
object_stream_set(false),
object_stream_mode(qpdf_o_preserve),
ignore_xref_streams(false),
qdf_mode(false),
preserve_unreferenced_objects(false),
remove_unreferenced_page_resources(re_auto),
keep_files_open(true),
keep_files_open_set(false),
keep_files_open_threshold(DEFAULT_KEEP_FILES_OPEN_THRESHOLD),
newline_before_endstream(false),
coalesce_contents(false),
flatten_annotations(false),
flatten_annotations_required(0),
flatten_annotations_forbidden(an_invisible | an_hidden),
generate_appearances(false),
show_npages(false),
deterministic_id(false),
static_id(false),
static_aes_iv(false),
suppress_original_object_id(false),
show_encryption(false),
show_encryption_key(false),
check_linearization(false),
show_linearization(false),
show_xref(false),
show_trailer(false),
show_obj(0),
show_gen(0),
show_raw_stream_data(false),
show_filtered_stream_data(false),
show_pages(false),
show_page_images(false),
collate(0),
flatten_rotation(false),
list_attachments(false),
json_version(0),
check(false),
optimize_images(false),
externalize_inline_images(false),
keep_inline_images(false),
remove_page_labels(false),
oi_min_width(DEFAULT_OI_MIN_WIDTH),
oi_min_height(DEFAULT_OI_MIN_HEIGHT),
oi_min_area(DEFAULT_OI_MIN_AREA),
ii_min_bytes(DEFAULT_II_MIN_BYTES),
underlay("underlay"),
overlay("overlay"),
under_overlay(0),
require_outfile(true),
replace_input(false),
check_is_encrypted(false),
check_requires_password(false)
{
}
QPDFJob::QPDFJob() :
m(new Members())
{
}
void
QPDFJob::usage(std::string const& msg)
{
throw QPDFUsage(msg);
}
void
QPDFJob::setMessagePrefix(std::string const& message_prefix)
{
this->m->message_prefix = message_prefix;
}
void
QPDFJob::setOutputStreams(std::ostream* out, std::ostream* err)
{
this->m->cout = out ? out : &std::cout;
this->m->cerr = err ? err : &std::cerr;
}
void
QPDFJob::doIfVerbose(
std::function<void(std::ostream&, std::string const& prefix)> fn)
{
if (this->m->verbose && (this->m->cout != nullptr)) {
fn(*(this->m->cout), this->m->message_prefix);
}
}
std::shared_ptr<QPDFJob::Config>
QPDFJob::config()
{
return std::shared_ptr<Config>(new Config(*this));
}
std::string
QPDFJob::job_json_schema_v1()
{
return JOB_SCHEMA_DATA;
}
void
QPDFJob::parseRotationParameter(std::string const& parameter)
{
std::string angle_str;
std::string range;
size_t colon = parameter.find(':');
int relative = 0;
if (colon != std::string::npos) {
if (colon > 0) {
angle_str = parameter.substr(0, colon);
}
if (colon + 1 < parameter.length()) {
range = parameter.substr(colon + 1);
}
} else {
angle_str = parameter;
}
if (angle_str.length() > 0) {
char first = angle_str.at(0);
if ((first == '+') || (first == '-')) {
relative = ((first == '+') ? 1 : -1);
angle_str = angle_str.substr(1);
} else if (!QUtil::is_digit(angle_str.at(0))) {
angle_str = "";
}
}
if (range.empty()) {
range = "1-z";
}
bool range_valid = false;
try {
QUtil::parse_numrange(range.c_str(), 0);
range_valid = true;
} catch (std::runtime_error const&) {
// ignore
}
if (range_valid &&
((angle_str == "0") || (angle_str == "90") || (angle_str == "180") ||
(angle_str == "270"))) {
int angle = QUtil::string_to_int(angle_str.c_str());
if (relative == -1) {
angle = -angle;
}
m->rotations[range] = RotationSpec(angle, (relative != 0));
} else {
usage("invalid parameter to rotate: " + parameter);
}
}
std::vector<int>
QPDFJob::parseNumrange(char const* range, int max)
{
try {
return QUtil::parse_numrange(range, max);
} catch (std::runtime_error& e) {
usage(e.what());
}
return std::vector<int>();
}
void
QPDFJob::run()
{
checkConfiguration();
std::shared_ptr<QPDF> pdf_ph;
try {
pdf_ph = processFile(m->infilename.get(), m->password.get(), true);
} catch (QPDFExc& e) {
if ((e.getErrorCode() == qpdf_e_password) &&
(m->check_is_encrypted || m->check_requires_password)) {
// Allow --is-encrypted and --requires-password to
// work when an incorrect password is supplied.
this->m->encryption_status =
qpdf_es_encrypted | qpdf_es_password_incorrect;
return;
}
throw e;
}
QPDF& pdf = *pdf_ph;
if (pdf.isEncrypted()) {
this->m->encryption_status = qpdf_es_encrypted;
}
if (m->check_is_encrypted || m->check_requires_password) {
return;
}
bool other_warnings = false;
std::vector<std::shared_ptr<QPDF>> page_heap;
if (!m->page_specs.empty()) {
handlePageSpecs(pdf, other_warnings, page_heap);
}
if (!m->rotations.empty()) {
handleRotations(pdf);
}
handleUnderOverlay(pdf);
handleTransformations(pdf);
if (!createsOutput()) {
doInspection(pdf);
} else if (m->split_pages) {
doSplitPages(pdf, other_warnings);
} else {
writeOutfile(pdf);
}
if (!pdf.getWarnings().empty()) {
this->m->warnings = true;
}
if (this->m->warnings && (!this->m->suppress_warnings)) {
if (createsOutput()) {
(*this->m->cerr)
<< this->m->message_prefix
<< ": operation succeeded with warnings;"
<< " resulting file may have some problems" << std::endl;
} else {
(*this->m->cerr)
<< this->m->message_prefix
<< ": operation succeeded with warnings" << std::endl;
}
}
}
bool
QPDFJob::hasWarnings() const
{
return this->m->warnings;
}
bool
QPDFJob::createsOutput() const
{
return ((m->outfilename != nullptr) || m->replace_input);
}
int
QPDFJob::getExitCode() const
{
if (this->m->check_is_encrypted) {
if (this->m->encryption_status & qpdf_es_encrypted) {
QTC::TC("qpdf", "QPDFJob check encrypted encrypted");
return 0;
} else {
QTC::TC("qpdf", "QPDFJob check encrypted not encrypted");
return EXIT_IS_NOT_ENCRYPTED;
}
} else if (this->m->check_requires_password) {
if (this->m->encryption_status & qpdf_es_encrypted) {
if (this->m->encryption_status & qpdf_es_password_incorrect) {
QTC::TC("qpdf", "QPDFJob check password password incorrect");
return 0;
} else {
QTC::TC("qpdf", "QPDFJob check password password correct");
return EXIT_CORRECT_PASSWORD;
}
} else {
QTC::TC("qpdf", "QPDFJob check password not encrypted");
return EXIT_IS_NOT_ENCRYPTED;
}
}
if (this->m->warnings && (!this->m->warnings_exit_zero)) {
return EXIT_WARNING;
}
return 0;
}
void
QPDFJob::checkConfiguration()
{
if (m->replace_input) {
if (m->outfilename) {
usage("--replace-input may not be used when"
" an output file is specified");
} else if (m->split_pages) {
usage("--split-pages may not be used with --replace-input");
}
}
if (m->infilename == 0) {
usage("an input file name is required");
} else if (
m->require_outfile && (m->outfilename == 0) && (!m->replace_input)) {
usage("an output file name is required; use - for standard output");
} else if (
(!m->require_outfile) && ((m->outfilename != 0) || m->replace_input)) {
usage("no output file may be given for this option");
}
if (m->check_requires_password && m->check_is_encrypted) {
usage("--requires-password and --is-encrypted may not be given"
" together");
}
if (m->encrypt && (!m->allow_insecure) &&
(m->owner_password.empty() && (!m->user_password.empty()) &&
(m->keylen == 256))) {
// Note that empty owner passwords for R < 5 are copied from
// the user password, so this lack of security is not an issue
// for those files. Also we are consider only the ability to
// open the file without a password to be insecure. We are not
// concerned about whether the viewer enforces security
// settings when the user and owner password match.
usage("A PDF with a non-empty user password and an empty owner"
" password encrypted with a 256-bit key is insecure as it"
" can be opened without a password. If you really want to"
" do this, you must also give the --allow-insecure option"
" before the -- that follows --encrypt.");
}
if (m->require_outfile && m->outfilename &&
(strcmp(m->outfilename.get(), "-") == 0)) {
if (m->split_pages) {
usage("--split-pages may not be used when"
" writing to standard output");
}
if (this->m->verbose) {
usage("--verbose may not be used when"
" writing to standard output");
}
if (m->progress) {
usage("--progress may not be used when"
" writing to standard output");
}
}
if ((!m->split_pages) &&
QUtil::same_file(m->infilename.get(), m->outfilename.get())) {
QTC::TC("qpdf", "QPDFJob same file error");
usage("input file and output file are the same;"
" use --replace-input to intentionally"
" overwrite the input file");
}
}
unsigned long
QPDFJob::getEncryptionStatus()
{
return this->m->encryption_status;
}
void
QPDFJob::setQPDFOptions(QPDF& pdf)
{
pdf.setOutputStreams(this->m->cout, this->m->cerr);
if (m->ignore_xref_streams) {
pdf.setIgnoreXRefStreams(true);
}
if (m->suppress_recovery) {
pdf.setAttemptRecovery(false);
}
if (m->password_is_hex_key) {
pdf.setPasswordIsHexKey(true);
}
if (m->suppress_warnings) {
pdf.setSuppressWarnings(true);
}
}
static std::string
show_bool(bool v)
{
return v ? "allowed" : "not allowed";
}
static std::string
show_encryption_method(QPDF::encryption_method_e method)
{
std::string result = "unknown";
switch (method) {
case QPDF::e_none:
result = "none";
break;
case QPDF::e_unknown:
result = "unknown";
break;
case QPDF::e_rc4:
result = "RC4";
break;
case QPDF::e_aes:
result = "AESv2";
break;
case QPDF::e_aesv3:
result = "AESv3";
break;
// no default so gcc will warn for missing case
}
return result;
}
void
QPDFJob::showEncryption(QPDF& pdf)
{
// Extract /P from /Encrypt
int R = 0;
int P = 0;
int V = 0;
QPDF::encryption_method_e stream_method = QPDF::e_unknown;
QPDF::encryption_method_e string_method = QPDF::e_unknown;
QPDF::encryption_method_e file_method = QPDF::e_unknown;
auto& cout = *this->m->cout;
if (!pdf.isEncrypted(R, P, V, stream_method, string_method, file_method)) {
cout << "File is not encrypted" << std::endl;
} else {
cout << "R = " << R << std::endl;
cout << "P = " << P << std::endl;
std::string user_password = pdf.getTrimmedUserPassword();
std::string encryption_key = pdf.getEncryptionKey();
cout << "User password = " << user_password << std::endl;
if (m->show_encryption_key) {
cout << "Encryption key = " << QUtil::hex_encode(encryption_key)
<< std::endl;
}
if (pdf.ownerPasswordMatched()) {
cout << "Supplied password is owner password" << std::endl;
}
if (pdf.userPasswordMatched()) {
cout << "Supplied password is user password" << std::endl;
}
cout << "extract for accessibility: "
<< show_bool(pdf.allowAccessibility()) << std::endl
<< "extract for any purpose: " << show_bool(pdf.allowExtractAll())
<< std::endl
<< "print low resolution: " << show_bool(pdf.allowPrintLowRes())
<< std::endl
<< "print high resolution: " << show_bool(pdf.allowPrintHighRes())
<< std::endl
<< "modify document assembly: "
<< show_bool(pdf.allowModifyAssembly()) << std::endl
<< "modify forms: " << show_bool(pdf.allowModifyForm())
<< std::endl
<< "modify annotations: " << show_bool(pdf.allowModifyAnnotation())
<< std::endl
<< "modify other: " << show_bool(pdf.allowModifyOther())
<< std::endl
<< "modify anything: " << show_bool(pdf.allowModifyAll())
<< std::endl;
if (V >= 4) {
cout << "stream encryption method: "
<< show_encryption_method(stream_method) << std::endl
<< "string encryption method: "
<< show_encryption_method(string_method) << std::endl
<< "file encryption method: "
<< show_encryption_method(file_method) << std::endl;
}
}
}
void
QPDFJob::doCheck(QPDF& pdf)
{
// Code below may set okay to false but not to true.
// We assume okay until we prove otherwise but may
// continue to perform additional checks after finding
// errors.
bool okay = true;
bool warnings = false;
auto& cout = *this->m->cout;
cout << "checking " << m->infilename << std::endl;
try {
int extension_level = pdf.getExtensionLevel();
cout << "PDF Version: " << pdf.getPDFVersion();
if (extension_level > 0) {
cout << " extension level " << pdf.getExtensionLevel();
}
cout << std::endl;
showEncryption(pdf);
if (pdf.isLinearized()) {
cout << "File is linearized\n";
// any errors or warnings are reported by
// checkLinearization(). We treat all issues reported here
// as warnings.
if (!pdf.checkLinearization()) {
warnings = true;
}
} else {
cout << "File is not linearized\n";
}
// Write the file to nowhere, uncompressing
// streams. This causes full file traversal and
// decoding of all streams we can decode.
QPDFWriter w(pdf);
Pl_Discard discard;
w.setOutputPipeline(&discard);
w.setDecodeLevel(qpdf_dl_all);
w.write();
// Parse all content streams
QPDFPageDocumentHelper dh(pdf);
std::vector<QPDFPageObjectHelper> pages = dh.getAllPages();
DiscardContents discard_contents;
int pageno = 0;
for (auto& page: pages) {
++pageno;
try {
page.parseContents(&discard_contents);
} catch (QPDFExc& e) {
okay = false;
*(this->m->cerr) << "ERROR: page " << pageno << ": " << e.what()
<< std::endl;
}
}
} catch (std::exception& e) {
(*this->m->cerr) << "ERROR: " << e.what() << std::endl;
okay = false;
}
if (!okay) {
throw std::runtime_error("errors detected");
}
if ((!pdf.getWarnings().empty()) || warnings) {
this->m->warnings = true;
} else {
*(this->m->cout) << "No syntax or stream encoding errors"
<< " found; the file may still contain" << std::endl
<< "errors that qpdf cannot detect" << std::endl;
}
}
void
QPDFJob::doShowObj(QPDF& pdf)
{
QPDFObjectHandle obj;
if (m->show_trailer) {
obj = pdf.getTrailer();
} else {
obj = pdf.getObjectByID(m->show_obj, m->show_gen);
}
bool error = false;
if (obj.isStream()) {
if (m->show_raw_stream_data || m->show_filtered_stream_data) {
bool filter = m->show_filtered_stream_data;
if (filter && (!obj.pipeStreamData(0, 0, qpdf_dl_all))) {
QTC::TC("qpdf", "QPDFJob unable to filter");
obj.warnIfPossible("unable to filter stream data");
error = true;
} else {
QUtil::binary_stdout();
Pl_StdioFile out("stdout", stdout);
obj.pipeStreamData(
&out,
(filter && m->normalize) ? qpdf_ef_normalize : 0,
filter ? qpdf_dl_all : qpdf_dl_none);
}
} else {
*(this->m->cout) << "Object is stream. Dictionary:" << std::endl
<< obj.getDict().unparseResolved() << std::endl;
}
} else {
*(this->m->cout) << obj.unparseResolved() << std::endl;
}
if (error) {
throw std::runtime_error(
"unable to get object " + obj.getObjGen().unparse());
}
}
void
QPDFJob::doShowPages(QPDF& pdf)
{
QPDFPageDocumentHelper dh(pdf);
std::vector<QPDFPageObjectHelper> pages = dh.getAllPages();
int pageno = 0;
auto& cout = *this->m->cout;
for (auto& ph: pages) {
QPDFObjectHandle page = ph.getObjectHandle();
++pageno;
cout << "page " << pageno << ": " << page.getObjectID() << " "
<< page.getGeneration() << " R" << std::endl;
if (m->show_page_images) {
std::map<std::string, QPDFObjectHandle> images = ph.getImages();
if (!images.empty()) {
cout << " images:" << std::endl;
for (auto const& iter2: images) {
std::string const& name = iter2.first;
QPDFObjectHandle image = iter2.second;
QPDFObjectHandle dict = image.getDict();
int width = dict.getKey("/Width").getIntValueAsInt();
int height = dict.getKey("/Height").getIntValueAsInt();
cout << " " << name << ": " << image.unparse() << ", "
<< width << " x " << height << std::endl;
}
}
}
cout << " content:" << std::endl;
std::vector<QPDFObjectHandle> content = ph.getPageContents();
for (auto& iter2: content) {
cout << " " << iter2.unparse() << std::endl;
}
}
}
void
QPDFJob::doListAttachments(QPDF& pdf)
{
QPDFEmbeddedFileDocumentHelper efdh(pdf);
if (efdh.hasEmbeddedFiles()) {
for (auto const& i: efdh.getEmbeddedFiles()) {
std::string const& key = i.first;
auto efoh = i.second;
*(this->m->cout)
<< key << " -> " << efoh->getEmbeddedFileStream().getObjGen()
<< std::endl;
doIfVerbose([&](std::ostream& cout, std::string const& prefix) {
auto desc = efoh->getDescription();
if (!desc.empty()) {
cout << " description: " << desc << std::endl;
}
cout << " preferred name: " << efoh->getFilename()
<< std::endl;
cout << " all names:" << std::endl;
for (auto const& i2: efoh->getFilenames()) {
cout << " " << i2.first << " -> " << i2.second
<< std::endl;
}
cout << " all data streams:" << std::endl;
for (auto i2: efoh->getEmbeddedFileStreams().ditems()) {
cout << " " << i2.first << " -> "
<< i2.second.getObjGen() << std::endl;
}
});
}
} else {
*(this->m->cout) << m->infilename << " has no embedded files"
<< std::endl;
}
}
void
QPDFJob::doShowAttachment(QPDF& pdf)
{
QPDFEmbeddedFileDocumentHelper efdh(pdf);
auto fs = efdh.getEmbeddedFile(m->attachment_to_show);
if (!fs) {
throw std::runtime_error(
"attachment " + m->attachment_to_show + " not found");
}
auto efs = fs->getEmbeddedFileStream();
QUtil::binary_stdout();
Pl_StdioFile out("stdout", stdout);
efs.pipeStreamData(&out, 0, qpdf_dl_all);
}
void
QPDFJob::parse_object_id(
std::string const& objspec, bool& trailer, int& obj, int& gen)
{
if (objspec == "trailer") {
trailer = true;
} else {
trailer = false;
obj = QUtil::string_to_int(objspec.c_str());
size_t comma = objspec.find(',');
if ((comma != std::string::npos) && (comma + 1 < objspec.length())) {
gen = QUtil::string_to_int(
objspec.substr(1 + comma, std::string::npos).c_str());
}
}
}
std::set<QPDFObjGen>
QPDFJob::getWantedJSONObjects()
{
std::set<QPDFObjGen> wanted_og;
for (auto const& iter: m->json_objects) {
bool trailer;
int obj = 0;
int gen = 0;
parse_object_id(iter, trailer, obj, gen);
if (obj) {
wanted_og.insert(QPDFObjGen(obj, gen));
}
}
return wanted_og;
}
void
QPDFJob::doJSONObjects(QPDF& pdf, JSON& j)
{
// Add all objects. Do this first before other code below modifies
// things by doing stuff like calling
// pushInheritedAttributesToPage.
bool all_objects = m->json_objects.empty();
std::set<QPDFObjGen> wanted_og = getWantedJSONObjects();
JSON j_objects = j.addDictionaryMember("objects", JSON::makeDictionary());
if (all_objects || m->json_objects.count("trailer")) {
j_objects.addDictionaryMember(
"trailer", pdf.getTrailer().getJSON(true));
}
std::vector<QPDFObjectHandle> objects = pdf.getAllObjects();
for (auto& obj: objects) {
if (all_objects || wanted_og.count(obj.getObjGen())) {
j_objects.addDictionaryMember(obj.unparse(), obj.getJSON(true));
}
}
}
void
QPDFJob::doJSONObjectinfo(QPDF& pdf, JSON& j)
{
// Do this first before other code below modifies things by doing
// stuff like calling pushInheritedAttributesToPage.
bool all_objects = m->json_objects.empty();
std::set<QPDFObjGen> wanted_og = getWantedJSONObjects();
JSON j_objectinfo =
j.addDictionaryMember("objectinfo", JSON::makeDictionary());
for (auto& obj: pdf.getAllObjects()) {
if (all_objects || wanted_og.count(obj.getObjGen())) {
auto j_details = j_objectinfo.addDictionaryMember(
obj.unparse(), JSON::makeDictionary());
auto j_stream =
j_details.addDictionaryMember("stream", JSON::makeDictionary());
bool is_stream = obj.isStream();
j_stream.addDictionaryMember("is", JSON::makeBool(is_stream));
j_stream.addDictionaryMember(
"length",
(is_stream ? obj.getDict().getKey("/Length").getJSON(true)
: JSON::makeNull()));
j_stream.addDictionaryMember(
"filter",
(is_stream ? obj.getDict().getKey("/Filter").getJSON(true)
: JSON::makeNull()));
}
}
}
void
QPDFJob::doJSONPages(QPDF& pdf, JSON& j)
{
JSON j_pages = j.addDictionaryMember("pages", JSON::makeArray());
QPDFPageDocumentHelper pdh(pdf);
QPDFPageLabelDocumentHelper pldh(pdf);
QPDFOutlineDocumentHelper odh(pdf);
pdh.pushInheritedAttributesToPage();
std::vector<QPDFPageObjectHelper> pages = pdh.getAllPages();
int pageno = -1;
for (auto& ph: pages) {
++pageno;
JSON j_page = j_pages.addArrayElement(JSON::makeDictionary());
QPDFObjectHandle page = ph.getObjectHandle();
j_page.addDictionaryMember("object", page.getJSON());
JSON j_images = j_page.addDictionaryMember("images", JSON::makeArray());
std::map<std::string, QPDFObjectHandle> images = ph.getImages();
for (auto const& iter2: images) {
JSON j_image = j_images.addArrayElement(JSON::makeDictionary());
j_image.addDictionaryMember("name", JSON::makeString(iter2.first));
QPDFObjectHandle image = iter2.second;
QPDFObjectHandle dict = image.getDict();
j_image.addDictionaryMember("object", image.getJSON());
j_image.addDictionaryMember(
"width", dict.getKey("/Width").getJSON());
j_image.addDictionaryMember(
"height", dict.getKey("/Height").getJSON());
j_image.addDictionaryMember(
"colorspace", dict.getKey("/ColorSpace").getJSON());
j_image.addDictionaryMember(
"bitspercomponent", dict.getKey("/BitsPerComponent").getJSON());
QPDFObjectHandle filters = dict.getKey("/Filter").wrapInArray();
j_image.addDictionaryMember("filter", filters.getJSON());
QPDFObjectHandle decode_parms = dict.getKey("/DecodeParms");
QPDFObjectHandle dp_array;
if (decode_parms.isArray()) {
dp_array = decode_parms;
} else {
dp_array = QPDFObjectHandle::newArray();
for (int i = 0; i < filters.getArrayNItems(); ++i) {
dp_array.appendItem(decode_parms);
}
}
j_image.addDictionaryMember("decodeparms", dp_array.getJSON());
j_image.addDictionaryMember(
"filterable",
JSON::makeBool(
image.pipeStreamData(0, 0, m->decode_level, true)));
}
j_page.addDictionaryMember("images", j_images);
JSON j_contents =
j_page.addDictionaryMember("contents", JSON::makeArray());
std::vector<QPDFObjectHandle> content = ph.getPageContents();
for (auto& iter2: content) {
j_contents.addArrayElement(iter2.getJSON());
}
j_page.addDictionaryMember(
"label", pldh.getLabelForPage(pageno).getJSON());
JSON j_outlines =
j_page.addDictionaryMember("outlines", JSON::makeArray());
std::vector<QPDFOutlineObjectHelper> outlines =
odh.getOutlinesForPage(page.getObjGen());
for (auto& oiter: outlines) {
JSON j_outline = j_outlines.addArrayElement(JSON::makeDictionary());
j_outline.addDictionaryMember(
"object", oiter.getObjectHandle().getJSON());
j_outline.addDictionaryMember(
"title", JSON::makeString(oiter.getTitle()));
j_outline.addDictionaryMember(
"dest", oiter.getDest().getJSON(true));
}
j_page.addDictionaryMember("pageposfrom1", JSON::makeInt(1 + pageno));
}
}
void
QPDFJob::doJSONPageLabels(QPDF& pdf, JSON& j)
{
JSON j_labels = j.addDictionaryMember("pagelabels", JSON::makeArray());
QPDFPageLabelDocumentHelper pldh(pdf);
QPDFPageDocumentHelper pdh(pdf);
std::vector<QPDFPageObjectHelper> pages = pdh.getAllPages();
if (pldh.hasPageLabels()) {
std::vector<QPDFObjectHandle> labels;
pldh.getLabelsForPageRange(
0, QIntC::to_int(pages.size()) - 1, 0, labels);
for (auto iter = labels.begin(); iter != labels.end(); ++iter) {
auto next = iter;
++next;
if (next == labels.end()) {
// This can't happen, so ignore it. This could only
// happen if getLabelsForPageRange somehow returned an
// odd number of items.
break;
}
JSON j_label = j_labels.addArrayElement(JSON::makeDictionary());
j_label.addDictionaryMember("index", (*iter).getJSON());
++iter;
j_label.addDictionaryMember("label", (*iter).getJSON());
}
}
}
static void
add_outlines_to_json(
std::vector<QPDFOutlineObjectHelper> outlines,
JSON& j,
std::map<QPDFObjGen, int>& page_numbers)
{
for (auto& ol: outlines) {
JSON jo = j.addArrayElement(JSON::makeDictionary());
jo.addDictionaryMember("object", ol.getObjectHandle().getJSON());
jo.addDictionaryMember("title", JSON::makeString(ol.getTitle()));
jo.addDictionaryMember("dest", ol.getDest().getJSON(true));
jo.addDictionaryMember("open", JSON::makeBool(ol.getCount() >= 0));
QPDFObjectHandle page = ol.getDestPage();
JSON j_destpage = JSON::makeNull();
if (page.isIndirect()) {
QPDFObjGen og = page.getObjGen();
if (page_numbers.count(og)) {
j_destpage = JSON::makeInt(page_numbers[og]);
}
}
jo.addDictionaryMember("destpageposfrom1", j_destpage);
JSON j_kids = jo.addDictionaryMember("kids", JSON::makeArray());
add_outlines_to_json(ol.getKids(), j_kids, page_numbers);
}
}
void
QPDFJob::doJSONOutlines(QPDF& pdf, JSON& j)
{
std::map<QPDFObjGen, int> page_numbers;
QPDFPageDocumentHelper dh(pdf);
std::vector<QPDFPageObjectHelper> pages = dh.getAllPages();
int n = 0;
for (auto const& ph: pages) {
QPDFObjectHandle oh = ph.getObjectHandle();
page_numbers[oh.getObjGen()] = ++n;
}
JSON j_outlines = j.addDictionaryMember("outlines", JSON::makeArray());
QPDFOutlineDocumentHelper odh(pdf);
add_outlines_to_json(odh.getTopLevelOutlines(), j_outlines, page_numbers);
}
void
QPDFJob::doJSONAcroform(QPDF& pdf, JSON& j)
{
JSON j_acroform = j.addDictionaryMember("acroform", JSON::makeDictionary());
QPDFAcroFormDocumentHelper afdh(pdf);
j_acroform.addDictionaryMember(
"hasacroform", JSON::makeBool(afdh.hasAcroForm()));
j_acroform.addDictionaryMember(
"needappearances", JSON::makeBool(afdh.getNeedAppearances()));
JSON j_fields = j_acroform.addDictionaryMember("fields", JSON::makeArray());
QPDFPageDocumentHelper pdh(pdf);
std::vector<QPDFPageObjectHelper> pages = pdh.getAllPages();
int pagepos1 = 0;
for (auto const& page: pages) {
++pagepos1;
std::vector<QPDFAnnotationObjectHelper> annotations =
afdh.getWidgetAnnotationsForPage(page);
for (auto& aoh: annotations) {
QPDFFormFieldObjectHelper ffh = afdh.getFieldForAnnotation(aoh);
JSON j_field = j_fields.addArrayElement(JSON::makeDictionary());
j_field.addDictionaryMember(
"object", ffh.getObjectHandle().getJSON());
j_field.addDictionaryMember(
"parent", ffh.getObjectHandle().getKey("/Parent").getJSON());
j_field.addDictionaryMember(
"pageposfrom1", JSON::makeInt(pagepos1));
j_field.addDictionaryMember(
"fieldtype", JSON::makeString(ffh.getFieldType()));
j_field.addDictionaryMember(
"fieldflags", JSON::makeInt(ffh.getFlags()));
j_field.addDictionaryMember(
"fullname", JSON::makeString(ffh.getFullyQualifiedName()));
j_field.addDictionaryMember(
"partialname", JSON::makeString(ffh.getPartialName()));
j_field.addDictionaryMember(
"alternativename", JSON::makeString(ffh.getAlternativeName()));
j_field.addDictionaryMember(
"mappingname", JSON::makeString(ffh.getMappingName()));
j_field.addDictionaryMember("value", ffh.getValue().getJSON());
j_field.addDictionaryMember(
"defaultvalue", ffh.getDefaultValue().getJSON());
j_field.addDictionaryMember(
"quadding", JSON::makeInt(ffh.getQuadding()));
j_field.addDictionaryMember(
"ischeckbox", JSON::makeBool(ffh.isCheckbox()));
j_field.addDictionaryMember(
"isradiobutton", JSON::makeBool(ffh.isRadioButton()));
j_field.addDictionaryMember(
"ischoice", JSON::makeBool(ffh.isChoice()));
j_field.addDictionaryMember("istext", JSON::makeBool(ffh.isText()));
JSON j_choices =
j_field.addDictionaryMember("choices", JSON::makeArray());
std::vector<std::string> choices = ffh.getChoices();
for (auto const& choice: choices) {
j_choices.addArrayElement(JSON::makeString(choice));
}
JSON j_annot = j_field.addDictionaryMember(
"annotation", JSON::makeDictionary());
j_annot.addDictionaryMember(
"object", aoh.getObjectHandle().getJSON());
j_annot.addDictionaryMember(
"appearancestate", JSON::makeString(aoh.getAppearanceState()));
j_annot.addDictionaryMember(
"annotationflags", JSON::makeInt(aoh.getFlags()));
}
}
}
void
QPDFJob::doJSONEncrypt(QPDF& pdf, JSON& j)
{
int R = 0;
int P = 0;
int V = 0;
QPDF::encryption_method_e stream_method = QPDF::e_none;
QPDF::encryption_method_e string_method = QPDF::e_none;
QPDF::encryption_method_e file_method = QPDF::e_none;
bool is_encrypted =
pdf.isEncrypted(R, P, V, stream_method, string_method, file_method);
JSON j_encrypt = j.addDictionaryMember("encrypt", JSON::makeDictionary());
j_encrypt.addDictionaryMember("encrypted", JSON::makeBool(is_encrypted));
j_encrypt.addDictionaryMember(
"userpasswordmatched",
JSON::makeBool(is_encrypted && pdf.userPasswordMatched()));
j_encrypt.addDictionaryMember(
"ownerpasswordmatched",
JSON::makeBool(is_encrypted && pdf.ownerPasswordMatched()));
JSON j_capabilities =
j_encrypt.addDictionaryMember("capabilities", JSON::makeDictionary());
j_capabilities.addDictionaryMember(
"accessibility", JSON::makeBool(pdf.allowAccessibility()));
j_capabilities.addDictionaryMember(
"extract", JSON::makeBool(pdf.allowExtractAll()));
j_capabilities.addDictionaryMember(
"printlow", JSON::makeBool(pdf.allowPrintLowRes()));
j_capabilities.addDictionaryMember(
"printhigh", JSON::makeBool(pdf.allowPrintHighRes()));
j_capabilities.addDictionaryMember(
"modifyassembly", JSON::makeBool(pdf.allowModifyAssembly()));
j_capabilities.addDictionaryMember(
"modifyforms", JSON::makeBool(pdf.allowModifyForm()));
// Typo will be fixed for json v2
/* cSpell:ignore moddifyannotations */
j_capabilities.addDictionaryMember(
"moddifyannotations", JSON::makeBool(pdf.allowModifyAnnotation()));
j_capabilities.addDictionaryMember(
"modifyother", JSON::makeBool(pdf.allowModifyOther()));
j_capabilities.addDictionaryMember(
"modify", JSON::makeBool(pdf.allowModifyAll()));
JSON j_parameters =
j_encrypt.addDictionaryMember("parameters", JSON::makeDictionary());
j_parameters.addDictionaryMember("R", JSON::makeInt(R));
j_parameters.addDictionaryMember("V", JSON::makeInt(V));
j_parameters.addDictionaryMember("P", JSON::makeInt(P));
int bits = 0;
JSON key = JSON::makeNull();
if (is_encrypted) {
std::string encryption_key = pdf.getEncryptionKey();
bits = QIntC::to_int(encryption_key.length() * 8);
if (m->show_encryption_key) {
key = JSON::makeString(QUtil::hex_encode(encryption_key));
}
}
j_parameters.addDictionaryMember("bits", JSON::makeInt(bits));
j_parameters.addDictionaryMember("key", key);
auto fix_method = [is_encrypted](QPDF::encryption_method_e& m) {
if (is_encrypted && m == QPDF::e_none) {
m = QPDF::e_rc4;
}
};
fix_method(stream_method);
fix_method(string_method);
fix_method(file_method);
std::string s_stream_method = show_encryption_method(stream_method);
std::string s_string_method = show_encryption_method(string_method);
std::string s_file_method = show_encryption_method(file_method);
std::string s_overall_method;
if ((stream_method == string_method) && (stream_method == file_method)) {
s_overall_method = s_stream_method;
} else {
s_overall_method = "mixed";
}
j_parameters.addDictionaryMember(
"method", JSON::makeString(s_overall_method));
j_parameters.addDictionaryMember(
"streammethod", JSON::makeString(s_stream_method));
j_parameters.addDictionaryMember(
"stringmethod", JSON::makeString(s_string_method));
j_parameters.addDictionaryMember(
"filemethod", JSON::makeString(s_file_method));
}
void
QPDFJob::doJSONAttachments(QPDF& pdf, JSON& j)
{
JSON j_attachments =
j.addDictionaryMember("attachments", JSON::makeDictionary());
QPDFEmbeddedFileDocumentHelper efdh(pdf);
for (auto const& iter: efdh.getEmbeddedFiles()) {
std::string const& key = iter.first;
auto fsoh = iter.second;
auto j_details =
j_attachments.addDictionaryMember(key, JSON::makeDictionary());
j_details.addDictionaryMember(
"filespec", JSON::makeString(fsoh->getObjectHandle().unparse()));
j_details.addDictionaryMember(
"preferredname", JSON::makeString(fsoh->getFilename()));
j_details.addDictionaryMember(
"preferredcontents",
JSON::makeString(fsoh->getEmbeddedFileStream().unparse()));
}
}
JSON
QPDFJob::json_schema(std::set<std::string>* keys)
{
// Style: use all lower-case keys with no dashes or underscores.
// Choose array or dictionary based on indexing. For example, we
// use a dictionary for objects because we want to index by object
// ID and an array for pages because we want to index by position.
// The pages in the pages array contain references back to the
// original object, which can be resolved in the objects
// dictionary. When a PDF construct that maps back to an original
// object is represented separately, use "object" as the key that
// references the original object.
// This JSON object doubles as a schema and as documentation for
// our JSON output. Any schema mismatch is a bug in qpdf. This
// helps to enforce our policy of consistently providing a known
// structure where every documented key will always be present,
// which makes it easier to consume our JSON. This is discussed in
// more depth in the manual.
JSON schema = JSON::makeDictionary();
schema.addDictionaryMember(
"version",
JSON::makeString(
"JSON format serial number; increased for non-compatible changes"));
JSON j_params = schema.addDictionaryMember("parameters", JSON::parse(R"({
"decodelevel": "decode level used to determine stream filterability"
})"));
bool all_keys = ((keys == 0) || keys->empty());
// The list of selectable top-level keys id duplicated in the
// following places: job.yml, QPDFJob::json_schema, and
// QPDFJob::doJSON.
if (all_keys || keys->count("objects")) {
schema.addDictionaryMember("objects", JSON::parse(R"({
"<n n R|trailer>": "json representation of object"
})"));
}
if (all_keys || keys->count("objectinfo")) {
JSON objectinfo =
schema.addDictionaryMember("objectinfo", JSON::parse(R"({
"<object-id>": {
"stream": {
"filter": "if stream, its filters, otherwise null",
"is": "whether the object is a stream",
"length": "if stream, its length, otherwise null"
}
}
})"));
}
if (all_keys || keys->count("pages")) {
JSON page = schema.addDictionaryMember("pages", JSON::parse(R"([
{
"contents": [
"reference to each content stream"
],
"images": [
{
"bitspercomponent": "bits per component",
"colorspace": "color space",
"decodeparms": [
"decode parameters for image data"
],
"filter": [
"filters applied to image data"
],
"filterable": "whether image data can be decoded using the decode level qpdf was invoked with",
"height": "image height",
"name": "name of image in XObject table",
"object": "reference to image stream",
"width": "image width"
}
],
"label": "page label dictionary, or null if none",
"object": "reference to original page object",
"outlines": [
{
"dest": "outline destination dictionary",
"object": "reference to outline that targets this page",
"title": "outline title"
}
],
"pageposfrom1": "position of page in document numbering from 1"
}
])"));
}
if (all_keys || keys->count("pagelabels")) {
JSON labels = schema.addDictionaryMember("pagelabels", JSON::parse(R"([
{
"index": "starting page position starting from zero",
"label": "page label dictionary"
}
])"));
}
if (all_keys || keys->count("outlines")) {
JSON outlines = schema.addDictionaryMember("outlines", JSON::parse(R"([
{
"dest": "outline destination dictionary",
"destpageposfrom1": "position of destination page in document numbered from 1; null if not known",
"kids": "array of descendent outlines",
"object": "reference to this outline",
"open": "whether the outline is displayed expanded",
"title": "outline title"
}
])"));
}
if (all_keys || keys->count("acroform")) {
JSON acroform = schema.addDictionaryMember("acroform", JSON::parse(R"({
"fields": [
{
"alternativename": "alternative name of field -- this is the one usually shown to users",
"annotation": {
"annotationflags": "annotation flags from /F -- see pdf_annotation_flag_e in qpdf/Constants.h",
"appearancestate": "appearance state -- can be used to determine value for checkboxes and radio buttons",
"object": "reference to the annotation object"
},
"choices": "for choices fields, the list of choices presented to the user",
"defaultvalue": "default value of field",
"fieldflags": "form field flags from /Ff -- see pdf_form_field_flag_e in qpdf/Constants.h",
"fieldtype": "field type",
"fullname": "full name of field",
"ischeckbox": "whether field is a checkbox",
"ischoice": "whether field is a list, combo, or dropdown",
"isradiobutton": "whether field is a radio button -- buttons in a single group share a parent",
"istext": "whether field is a text field",
"mappingname": "mapping name of field",
"object": "reference to this form field",
"pageposfrom1": "position of containing page numbered from 1",
"parent": "reference to this field's parent",
"partialname": "partial name of field",
"quadding": "field quadding -- number indicating left, center, or right",
"value": "value of field"
}
],
"hasacroform": "whether the document has interactive forms",
"needappearances": "whether the form fields' appearance streams need to be regenerated"
})"));
}
if (all_keys || keys->count("encrypt")) {
JSON encrypt = schema.addDictionaryMember("encrypt", JSON::parse(R"({
"capabilities": {
"accessibility": "allow extraction for accessibility?",
"extract": "allow extraction?",
"moddifyannotations": "allow modifying annotations?",
"modify": "allow all modifications?",
"modifyassembly": "allow modifying document assembly?",
"modifyforms": "allow modifying forms?",
"modifyother": "allow other modifications?",
"printhigh": "allow high resolution printing?",
"printlow": "allow low resolution printing?"
},
"encrypted": "whether the document is encrypted",
"ownerpasswordmatched": "whether supplied password matched owner password; always false for non-encrypted files",
"parameters": {
"P": "P value from Encrypt dictionary",
"R": "R value from Encrypt dictionary",
"V": "V value from Encrypt dictionary",
"bits": "encryption key bit length",
"filemethod": "encryption method for attachments",
"key": "encryption key; will be null unless --show-encryption-key was specified",
"method": "overall encryption method: none, mixed, RC4, AESv2, AESv3",
"streammethod": "encryption method for streams",
"stringmethod": "encryption method for string"
},
"userpasswordmatched": "whether supplied password matched user password; always false for non-encrypted files"
})"));
}
if (all_keys || keys->count("attachments")) {
JSON attachments =
schema.addDictionaryMember("attachments", JSON::parse(R"({
"<attachment-key>": {
"filespec": "object containing the file spec",
"preferredcontents": "most preferred embedded file stream",
"preferredname": "most preferred file name"
}
})"));
}
return schema;
}
std::string
QPDFJob::json_out_schema_v1()
{
return json_schema().unparse();
}
void
QPDFJob::doJSON(QPDF& pdf)
{
JSON j = JSON::makeDictionary();
// This version is updated every time a non-backward-compatible
// change is made to the JSON format. Clients of the JSON are to
// ignore unrecognized keys, so we only update the version of a
// key disappears or if its value changes meaning.
j.addDictionaryMember("version", JSON::makeInt(1));
JSON j_params = j.addDictionaryMember("parameters", JSON::makeDictionary());
std::string decode_level_str;
switch (m->decode_level) {
case qpdf_dl_none:
decode_level_str = "none";
break;
case qpdf_dl_generalized:
decode_level_str = "generalized";
break;
case qpdf_dl_specialized:
decode_level_str = "specialized";
break;
case qpdf_dl_all:
decode_level_str = "all";
break;
}
j_params.addDictionaryMember(
"decodelevel", JSON::makeString(decode_level_str));
bool all_keys = m->json_keys.empty();
// The list of selectable top-level keys id duplicated in the
// following places: job.yml, QPDFJob::json_schema, and
// QPDFJob::doJSON.
if (all_keys || m->json_keys.count("objects")) {
doJSONObjects(pdf, j);
}
if (all_keys || m->json_keys.count("objectinfo")) {
doJSONObjectinfo(pdf, j);
}
if (all_keys || m->json_keys.count("pages")) {
doJSONPages(pdf, j);
}
if (all_keys || m->json_keys.count("pagelabels")) {
doJSONPageLabels(pdf, j);
}
if (all_keys || m->json_keys.count("outlines")) {
doJSONOutlines(pdf, j);
}
if (all_keys || m->json_keys.count("acroform")) {
doJSONAcroform(pdf, j);
}
if (all_keys || m->json_keys.count("encrypt")) {
doJSONEncrypt(pdf, j);
}
if (all_keys || m->json_keys.count("attachments")) {
doJSONAttachments(pdf, j);
}
// Check against schema
JSON schema = json_schema(&m->json_keys);
std::list<std::string> errors;
if (!j.checkSchema(schema, errors)) {
*(this->m->cerr)
<< "QPDFJob didn't create JSON that complies with its own rules.\n\
Please report this as a bug at\n\
https://github.com/qpdf/qpdf/issues/new\n\
ideally with the file that caused the error and the output below. Thanks!\n\
\n";
for (auto const& error: errors) {
*(this->m->cerr) << error << std::endl;
}
}
*(this->m->cout) << j.unparse() << std::endl;
}
void
QPDFJob::doInspection(QPDF& pdf)
{
if (m->check) {
doCheck(pdf);
}
if (m->json_version) {
doJSON(pdf);
}
if (m->show_npages) {
QTC::TC("qpdf", "QPDFJob npages");
*(this->m->cout)
<< pdf.getRoot().getKey("/Pages").getKey("/Count").getIntValue()
<< std::endl;
}
if (m->show_encryption) {
showEncryption(pdf);
}
if (m->check_linearization) {
if (!pdf.isLinearized()) {
*(this->m->cout)
<< m->infilename << " is not linearized" << std::endl;
} else if (pdf.checkLinearization()) {
*(this->m->cout)
<< m->infilename << ": no linearization errors" << std::endl;
} else {
this->m->warnings = true;
}
}
if (m->show_linearization) {
if (pdf.isLinearized()) {
pdf.showLinearizationData();
} else {
*(this->m->cout)
<< m->infilename << " is not linearized" << std::endl;
}
}
if (m->show_xref) {
pdf.showXRefTable();
}
if ((m->show_obj > 0) || m->show_trailer) {
doShowObj(pdf);
}
if (m->show_pages) {
doShowPages(pdf);
}
if (m->list_attachments) {
doListAttachments(pdf);
}
if (!m->attachment_to_show.empty()) {
doShowAttachment(pdf);
}
if (!pdf.getWarnings().empty()) {
this->m->warnings = true;
}
}
std::shared_ptr<QPDF>
QPDFJob::doProcessOnce(
std::function<void(QPDF*, char const*)> fn,
char const* password,
bool empty,
bool used_for_input)
{
auto pdf = std::make_shared<QPDF>();
setQPDFOptions(*pdf);
if (empty) {
pdf->emptyPDF();
} else {
fn(pdf.get(), password);
}
if (used_for_input) {
this->m->max_input_version.updateIfGreater(
pdf->getVersionAsPDFVersion());
}
return pdf;
}
std::shared_ptr<QPDF>
QPDFJob::doProcess(
std::function<void(QPDF*, char const*)> fn,
char const* password,
bool empty,
bool used_for_input)
{
// If a password has been specified but doesn't work, try other
// passwords that are equivalent in different character encodings.
// This makes it possible to open PDF files that were encrypted
// using incorrect string encodings. For example, if someone used
// a password encoded in PDF Doc encoding or Windows code page
// 1252 for an AES-encrypted file or a UTF-8-encoded password on
// an RC4-encrypted file, or if the password was properly encoded
// but the password given here was incorrectly encoded, there's a
// good chance we'd succeed here.
std::string ptemp;
if (password && (!m->password_is_hex_key)) {
if (m->password_mode == QPDFJob::pm_hex_bytes) {
// Special case: handle --password-mode=hex-bytes for input
// password as well as output password
QTC::TC("qpdf", "QPDFJob input password hex-bytes");
ptemp = QUtil::hex_decode(password);
password = ptemp.c_str();
}
}
if ((password == 0) || empty || m->password_is_hex_key ||
m->suppress_password_recovery) {
// There is no password, or we're not doing recovery, so just
// do the normal processing with the supplied password.
return doProcessOnce(fn, password, empty, used_for_input);
}
// Get a list of otherwise encoded strings. Keep in scope for this
// method.
std::vector<std::string> passwords_str =
QUtil::possible_repaired_encodings(password);
// Represent to char const*, as required by the QPDF class.
std::vector<char const*> passwords;
for (auto const& iter: passwords_str) {
passwords.push_back(iter.c_str());
}
// We always try the supplied password first because it is the
// first string returned by possible_repaired_encodings. If there
// is more than one option, go ahead and put the supplied password
// at the end so that it's that decoding attempt whose exception
// is thrown.
if (passwords.size() > 1) {
passwords.push_back(password);
}
// Try each password. If one works, return the resulting object.
// If they all fail, throw the exception thrown by the final
// attempt, which, like the first attempt, will be with the
// supplied password.
bool warned = false;
for (auto iter = passwords.begin(); iter != passwords.end(); ++iter) {
try {
return doProcessOnce(fn, *iter, empty, used_for_input);
} catch (QPDFExc& e) {
auto next = iter;
++next;
if (next == passwords.end()) {
throw e;
}
}
if (!warned) {
warned = true;
doIfVerbose([&](std::ostream& cout, std::string const& prefix) {
cout << prefix << ": supplied password didn't work;"
<< " trying other passwords based on interpreting"
<< " password with different string encodings"
<< std::endl;
});
}
}
// Should not be reachable
throw std::logic_error("do_process returned");
}
std::shared_ptr<QPDF>
QPDFJob::processFile(
char const* filename, char const* password, bool used_for_input)
{
auto f1 = std::mem_fn<void(char const*, char const*)>(&QPDF::processFile);
auto fn =
std::bind(f1, std::placeholders::_1, filename, std::placeholders::_2);
return doProcess(fn, password, strcmp(filename, "") == 0, used_for_input);
}
std::shared_ptr<QPDF>
QPDFJob::processInputSource(
std::shared_ptr<InputSource> is, char const* password, bool used_for_input)
{
auto f1 = std::mem_fn(&QPDF::processInputSource);
auto fn = std::bind(f1, std::placeholders::_1, is, std::placeholders::_2);
return doProcess(fn, password, false, used_for_input);
}
void
QPDFJob::validateUnderOverlay(QPDF& pdf, UnderOverlay* uo)
{
if (uo->filename.empty()) {
return;
}
QPDFPageDocumentHelper main_pdh(pdf);
int main_npages = QIntC::to_int(main_pdh.getAllPages().size());
uo->pdf = processFile(uo->filename.c_str(), uo->password.get(), true);
QPDFPageDocumentHelper uo_pdh(*(uo->pdf));
int uo_npages = QIntC::to_int(uo_pdh.getAllPages().size());
try {
uo->to_pagenos = QUtil::parse_numrange(uo->to_nr.c_str(), main_npages);
} catch (std::runtime_error& e) {
throw std::runtime_error(
"parsing numeric range for " + uo->which +
" \"to\" pages: " + e.what());
}
try {
if (uo->from_nr.empty()) {
QTC::TC("qpdf", "QPDFJob from_nr from repeat_nr");
uo->from_nr = uo->repeat_nr;
}
uo->from_pagenos =
QUtil::parse_numrange(uo->from_nr.c_str(), uo_npages);
if (!uo->repeat_nr.empty()) {
uo->repeat_pagenos =
QUtil::parse_numrange(uo->repeat_nr.c_str(), uo_npages);
}
} catch (std::runtime_error& e) {
throw std::runtime_error(
"parsing numeric range for " + uo->which + " file " + uo->filename +
": " + e.what());
}
}
static QPDFAcroFormDocumentHelper*
get_afdh_for_qpdf(
std::map<unsigned long long, std::shared_ptr<QPDFAcroFormDocumentHelper>>&
afdh_map,
QPDF* q)
{
auto uid = q->getUniqueId();
if (!afdh_map.count(uid)) {
afdh_map[uid] = std::make_shared<QPDFAcroFormDocumentHelper>(*q);
}
return afdh_map[uid].get();
}
void
QPDFJob::doUnderOverlayForPage(
QPDF& pdf,
UnderOverlay& uo,
std::map<int, std::vector<int>>& pagenos,
size_t page_idx,
std::map<int, QPDFObjectHandle>& fo,
std::vector<QPDFPageObjectHelper>& pages,
QPDFPageObjectHelper& dest_page,
bool before)
{
int pageno = 1 + QIntC::to_int(page_idx);
if (!pagenos.count(pageno)) {
return;
}
std::map<unsigned long long, std::shared_ptr<QPDFAcroFormDocumentHelper>>
afdh;
auto make_afdh = [&](QPDFPageObjectHelper& ph) {
QPDF* q = ph.getObjectHandle().getOwningQPDF();
return get_afdh_for_qpdf(afdh, q);
};
auto dest_afdh = make_afdh(dest_page);
std::string content;
int min_suffix = 1;
QPDFObjectHandle resources = dest_page.getAttribute("/Resources", true);
if (!resources.isDictionary()) {
QTC::TC("qpdf", "QPDFJob overlay page with no resources");
resources = dest_page.getObjectHandle().replaceKeyAndGet(
"/Resources", QPDFObjectHandle::newDictionary());
}
for (int from_pageno: pagenos[pageno]) {
doIfVerbose([&](std::ostream& cout, std::string const& prefix) {
cout << " " << uo.which << " " << from_pageno << std::endl;
});
auto from_page = pages.at(QIntC::to_size(from_pageno - 1));
if (0 == fo.count(from_pageno)) {
fo[from_pageno] =
pdf.copyForeignObject(from_page.getFormXObjectForPage());
}
// If the same page is overlaid or underlaid multiple times,
// we'll generate multiple names for it, but that's harmless
// and also a pretty goofy case that's not worth coding
// around.
std::string name = resources.getUniqueResourceName("/Fx", min_suffix);
QPDFMatrix cm;
std::string new_content = dest_page.placeFormXObject(
fo[from_pageno],
name,
dest_page.getTrimBox().getArrayAsRectangle(),
cm);
dest_page.copyAnnotations(
from_page, cm, dest_afdh, make_afdh(from_page));
if (!new_content.empty()) {
resources.mergeResources("<< /XObject << >> >>"_qpdf);
auto xobject = resources.getKey("/XObject");
if (xobject.isDictionary()) {
xobject.replaceKey(name, fo[from_pageno]);
}
++min_suffix;
content += new_content;
}
}
if (!content.empty()) {
if (before) {
dest_page.addPageContents(
QPDFObjectHandle::newStream(&pdf, content), true);
} else {
dest_page.addPageContents(
QPDFObjectHandle::newStream(&pdf, "q\n"), true);
dest_page.addPageContents(
QPDFObjectHandle::newStream(&pdf, "\nQ\n" + content), false);
}
}
}
void
QPDFJob::getUOPagenos(
QPDFJob::UnderOverlay& uo, std::map<int, std::vector<int>>& pagenos)
{
size_t idx = 0;
size_t from_size = uo.from_pagenos.size();
size_t repeat_size = uo.repeat_pagenos.size();
for (int to_pageno: uo.to_pagenos) {
if (idx < from_size) {
pagenos[to_pageno].push_back(uo.from_pagenos.at(idx));
} else if (repeat_size) {
pagenos[to_pageno].push_back(
uo.repeat_pagenos.at((idx - from_size) % repeat_size));
}
++idx;
}
}
void
QPDFJob::handleUnderOverlay(QPDF& pdf)
{
validateUnderOverlay(pdf, &m->underlay);
validateUnderOverlay(pdf, &m->overlay);
if ((nullptr == m->underlay.pdf.get()) &&
(nullptr == m->overlay.pdf.get())) {
return;
}
std::map<int, std::vector<int>> underlay_pagenos;
getUOPagenos(m->underlay, underlay_pagenos);
std::map<int, std::vector<int>> overlay_pagenos;
getUOPagenos(m->overlay, overlay_pagenos);
std::map<int, QPDFObjectHandle> underlay_fo;
std::map<int, QPDFObjectHandle> overlay_fo;
std::vector<QPDFPageObjectHelper> upages;
if (m->underlay.pdf.get()) {
upages = QPDFPageDocumentHelper(*(m->underlay.pdf)).getAllPages();
}
std::vector<QPDFPageObjectHelper> opages;
if (m->overlay.pdf.get()) {
opages = QPDFPageDocumentHelper(*(m->overlay.pdf)).getAllPages();
}
QPDFPageDocumentHelper main_pdh(pdf);
std::vector<QPDFPageObjectHelper> main_pages = main_pdh.getAllPages();
size_t main_npages = main_pages.size();
doIfVerbose([&](std::ostream& cout, std::string const& prefix) {
cout << prefix << ": processing underlay/overlay" << std::endl;
});
for (size_t i = 0; i < main_npages; ++i) {
doIfVerbose([&](std::ostream& cout, std::string const& prefix) {
cout << " page " << 1 + i << std::endl;
});
doUnderOverlayForPage(
pdf,
m->underlay,
underlay_pagenos,
i,
underlay_fo,
upages,
main_pages.at(i),
true);
doUnderOverlayForPage(
pdf,
m->overlay,
overlay_pagenos,
i,
overlay_fo,
opages,
main_pages.at(i),
false);
}
}
static void
maybe_set_pagemode(QPDF& pdf, std::string const& pagemode)
{
auto root = pdf.getRoot();
if (root.getKey("/PageMode").isNull()) {
root.replaceKey("/PageMode", QPDFObjectHandle::newName(pagemode));
}
}
void
QPDFJob::addAttachments(QPDF& pdf)
{
maybe_set_pagemode(pdf, "/UseAttachments");
QPDFEmbeddedFileDocumentHelper efdh(pdf);
std::vector<std::string> duplicated_keys;
for (auto const& to_add: m->attachments_to_add) {
if ((!to_add.replace) && efdh.getEmbeddedFile(to_add.key)) {
duplicated_keys.push_back(to_add.key);
continue;
}
auto fs = QPDFFileSpecObjectHelper::createFileSpec(
pdf, to_add.filename, to_add.path);
if (!to_add.description.empty()) {
fs.setDescription(to_add.description);
}
auto efs = QPDFEFStreamObjectHelper(fs.getEmbeddedFileStream());
efs.setCreationDate(to_add.creationdate).setModDate(to_add.moddate);
if (!to_add.mimetype.empty()) {
efs.setSubtype(to_add.mimetype);
}
efdh.replaceEmbeddedFile(to_add.key, fs);
doIfVerbose([&](std::ostream& cout, std::string const& prefix) {
cout << prefix << ": attached " << to_add.path << " as "
<< to_add.filename << " with key " << to_add.key << std::endl;
});
}
if (!duplicated_keys.empty()) {
std::string message;
for (auto const& k: duplicated_keys) {
if (!message.empty()) {
message += ", ";
}
message += k;
}
message = pdf.getFilename() +
" already has attachments with the following keys: " + message +
"; use --replace to replace or --key to specify a different key";
throw std::runtime_error(message);
}
}
void
QPDFJob::copyAttachments(QPDF& pdf)
{
maybe_set_pagemode(pdf, "/UseAttachments");
QPDFEmbeddedFileDocumentHelper efdh(pdf);
std::vector<std::string> duplicates;
for (auto const& to_copy: m->attachments_to_copy) {
doIfVerbose([&](std::ostream& cout, std::string const& prefix) {
cout << prefix << ": copying attachments from " << to_copy.path
<< std::endl;
});
auto other =
processFile(to_copy.path.c_str(), to_copy.password.c_str(), false);
QPDFEmbeddedFileDocumentHelper other_efdh(*other);
auto other_attachments = other_efdh.getEmbeddedFiles();
for (auto const& iter: other_attachments) {
std::string new_key = to_copy.prefix + iter.first;
if (efdh.getEmbeddedFile(new_key)) {
duplicates.push_back(
"file: " + to_copy.path + ", key: " + new_key);
} else {
auto new_fs_oh =
pdf.copyForeignObject(iter.second->getObjectHandle());
efdh.replaceEmbeddedFile(
new_key, QPDFFileSpecObjectHelper(new_fs_oh));
doIfVerbose([&](std::ostream& cout, std::string const& prefix) {
cout << " " << iter.first << " -> " << new_key
<< std::endl;
});
}
}
if (other->anyWarnings()) {
this->m->warnings = true;
}
}
if (!duplicates.empty()) {
std::string message;
for (auto const& i: duplicates) {
if (!message.empty()) {
message += "; ";
}
message += i;
}
message = pdf.getFilename() +
" already has attachments with keys that conflict with"
" attachments from other files: " +
message +
". Use --prefix with --copy-attachments-from"
" or manually copy individual attachments.";
throw std::runtime_error(message);
}
}
void
QPDFJob::handleTransformations(QPDF& pdf)
{
QPDFPageDocumentHelper dh(pdf);
std::shared_ptr<QPDFAcroFormDocumentHelper> afdh;
auto make_afdh = [&]() {
if (!afdh.get()) {
afdh = std::make_shared<QPDFAcroFormDocumentHelper>(pdf);
}
};
if (m->externalize_inline_images ||
(m->optimize_images && (!m->keep_inline_images))) {
std::vector<QPDFPageObjectHelper> pages = dh.getAllPages();
for (auto& ph: pages) {
ph.externalizeInlineImages(m->ii_min_bytes);
}
}
if (m->optimize_images) {
int pageno = 0;
std::vector<QPDFPageObjectHelper> pages = dh.getAllPages();
for (auto& ph: pages) {
++pageno;
QPDFObjectHandle page = ph.getObjectHandle();
std::map<std::string, QPDFObjectHandle> images = ph.getImages();
for (auto& iter2: images) {
std::string name = iter2.first;
QPDFObjectHandle& image = iter2.second;
ImageOptimizer* io = new ImageOptimizer(
*this,
m->oi_min_width,
m->oi_min_height,
m->oi_min_area,
image);
std::shared_ptr<QPDFObjectHandle::StreamDataProvider> sdp(io);
if (io->evaluate(
"image " + name + " on page " +
QUtil::int_to_string(pageno))) {
QPDFObjectHandle new_image =
QPDFObjectHandle::newStream(&pdf);
new_image.replaceDict(image.getDict().shallowCopy());
new_image.replaceStreamData(
sdp,
QPDFObjectHandle::newName("/DCTDecode"),
QPDFObjectHandle::newNull());
ph.getAttribute("/Resources", true)
.getKey("/XObject")
.replaceKey(name, new_image);
}
}
}
}
if (m->generate_appearances) {
make_afdh();
afdh->generateAppearancesIfNeeded();
}
if (m->flatten_annotations) {
dh.flattenAnnotations(
m->flatten_annotations_required, m->flatten_annotations_forbidden);
}
if (m->coalesce_contents) {
std::vector<QPDFPageObjectHelper> pages = dh.getAllPages();
for (auto& page: pages) {
page.coalesceContentStreams();
}
}
if (m->flatten_rotation) {
make_afdh();
for (auto& page: dh.getAllPages()) {
page.flattenRotation(afdh.get());
}
}
if (m->remove_page_labels) {
pdf.getRoot().removeKey("/PageLabels");
}
if (!m->attachments_to_remove.empty()) {
QPDFEmbeddedFileDocumentHelper efdh(pdf);
for (auto const& key: m->attachments_to_remove) {
if (efdh.removeEmbeddedFile(key)) {
doIfVerbose([&](std::ostream& cout, std::string const& prefix) {
cout << prefix << ": removed attachment " << key
<< std::endl;
});
} else {
throw std::runtime_error("attachment " + key + " not found");
}
}
}
if (!m->attachments_to_add.empty()) {
addAttachments(pdf);
}
if (!m->attachments_to_copy.empty()) {
copyAttachments(pdf);
}
}
bool
QPDFJob::shouldRemoveUnreferencedResources(QPDF& pdf)
{
if (m->remove_unreferenced_page_resources == QPDFJob::re_no) {
return false;
} else if (m->remove_unreferenced_page_resources == QPDFJob::re_yes) {
return true;
}
// Unreferenced resources are common in files where resources
// dictionaries are shared across pages. As a heuristic, we look
// in the file for shared resources dictionaries or shared XObject
// subkeys of resources dictionaries either on pages or on form
// XObjects in pages. If we find any, then there is a higher
// likelihood that the expensive process of finding unreferenced
// resources is worth it.
// Return true as soon as we find any shared resources.
std::set<QPDFObjGen> resources_seen; // shared resources detection
std::set<QPDFObjGen> nodes_seen; // loop detection
doIfVerbose([&](std::ostream& cout, std::string const& prefix) {
cout << prefix << ": " << pdf.getFilename()
<< ": checking for shared resources" << std::endl;
});
std::list<QPDFObjectHandle> queue;
queue.push_back(pdf.getRoot().getKey("/Pages"));
while (!queue.empty()) {
QPDFObjectHandle node = *queue.begin();
queue.pop_front();
QPDFObjGen og = node.getObjGen();
if (nodes_seen.count(og)) {
continue;
}
nodes_seen.insert(og);
QPDFObjectHandle dict = node.isStream() ? node.getDict() : node;
QPDFObjectHandle kids = dict.getKey("/Kids");
if (kids.isArray()) {
// This is a non-leaf node.
if (dict.hasKey("/Resources")) {
QTC::TC("qpdf", "QPDFJob found resources in non-leaf");
doIfVerbose([&](std::ostream& cout, std::string const& prefix) {
cout << " found resources in non-leaf page node "
<< og.getObj() << " " << og.getGen() << std::endl;
});
return true;
}
int n = kids.getArrayNItems();
for (int i = 0; i < n; ++i) {
queue.push_back(kids.getArrayItem(i));
}
} else {
// This is a leaf node or a form XObject.
QPDFObjectHandle resources = dict.getKey("/Resources");
if (resources.isIndirect()) {
QPDFObjGen resources_og = resources.getObjGen();
if (resources_seen.count(resources_og)) {
QTC::TC("qpdf", "QPDFJob found shared resources in leaf");
doIfVerbose(
[&](std::ostream& cout, std::string const& prefix) {
cout << " found shared resources in leaf node "
<< og.getObj() << " " << og.getGen() << ": "
<< resources_og.getObj() << " "
<< resources_og.getGen() << std::endl;
});
return true;
}
resources_seen.insert(resources_og);
}
QPDFObjectHandle xobject =
(resources.isDictionary() ? resources.getKey("/XObject")
: QPDFObjectHandle::newNull());
if (xobject.isIndirect()) {
QPDFObjGen xobject_og = xobject.getObjGen();
if (resources_seen.count(xobject_og)) {
QTC::TC("qpdf", "QPDFJob found shared xobject in leaf");
doIfVerbose(
[&](std::ostream& cout, std::string const& prefix) {
cout << " found shared xobject in leaf node "
<< og.getObj() << " " << og.getGen() << ": "
<< xobject_og.getObj() << " "
<< xobject_og.getGen() << std::endl;
});
return true;
}
resources_seen.insert(xobject_og);
}
if (xobject.isDictionary()) {
for (auto const& k: xobject.getKeys()) {
QPDFObjectHandle xobj = xobject.getKey(k);
if (xobj.isFormXObject()) {
queue.push_back(xobj);
}
}
}
}
}
doIfVerbose([&](std::ostream& cout, std::string const& prefix) {
cout << prefix << ": no shared resources found" << std::endl;
});
return false;
}
static QPDFObjectHandle
added_page(QPDF& pdf, QPDFObjectHandle page)
{
QPDFObjectHandle result = page;
if (page.getOwningQPDF() != &pdf) {
// Calling copyForeignObject on an object we already copied
// will give us the already existing copy.
result = pdf.copyForeignObject(page);
}
return result;
}
static QPDFObjectHandle
added_page(QPDF& pdf, QPDFPageObjectHelper page)
{
return added_page(pdf, page.getObjectHandle());
}
void
QPDFJob::handlePageSpecs(
QPDF& pdf, bool& warnings, std::vector<std::shared_ptr<QPDF>>& page_heap)
{
// Parse all page specifications and translate them into lists of
// actual pages.
// Handle "." as a shortcut for the input file
for (auto& page_spec: m->page_specs) {
if (page_spec.filename == ".") {
page_spec.filename = m->infilename.get();
}
}
if (!m->keep_files_open_set) {
// Count the number of distinct files to determine whether we
// should keep files open or not. Rather than trying to code
// some portable heuristic based on OS limits, just hard-code
// this at a given number and allow users to override.
std::set<std::string> filenames;
for (auto& page_spec: m->page_specs) {
filenames.insert(page_spec.filename);
}
m->keep_files_open = (filenames.size() <= m->keep_files_open_threshold);
QTC::TC(
"qpdf",
"QPDFJob automatically set keep files open",
m->keep_files_open ? 0 : 1);
doIfVerbose([&](std::ostream& cout, std::string const& prefix) {
cout << prefix << ": selecting --keep-open-files="
<< (m->keep_files_open ? "y" : "n") << std::endl;
});
}
// Create a QPDF object for each file that we may take pages from.
std::map<std::string, QPDF*> page_spec_qpdfs;
std::map<std::string, ClosedFileInputSource*> page_spec_cfis;
page_spec_qpdfs[m->infilename.get()] = &pdf;
std::vector<QPDFPageData> parsed_specs;
std::map<unsigned long long, std::set<QPDFObjGen>> copied_pages;
for (auto& page_spec: m->page_specs) {
if (page_spec_qpdfs.count(page_spec.filename) == 0) {
// Open the PDF file and store the QPDF object. Throw a
// std::shared_ptr to the qpdf into a heap so that it
// survives through copying to the output but gets cleaned up
// automatically at the end. Do not canonicalize the file
// name. Using two different paths to refer to the same
// file is a documented workaround for duplicating a page.
// If you are using this an example of how to do this with
// the API, you can just create two different QPDF objects
// to the same underlying file with the same path to
// achieve the same affect.
char const* password = page_spec.password.get();
if ((!m->encryption_file.empty()) && (password == 0) &&
(page_spec.filename == m->encryption_file)) {
QTC::TC("qpdf", "QPDFJob pages encryption password");
password = m->encryption_file_password.get();
}
doIfVerbose([&](std::ostream& cout, std::string const& prefix) {
cout << prefix << ": processing " << page_spec.filename
<< std::endl;
});
std::shared_ptr<InputSource> is;
ClosedFileInputSource* cis = 0;
if (!m->keep_files_open) {
QTC::TC("qpdf", "QPDFJob keep files open n");
cis = new ClosedFileInputSource(page_spec.filename.c_str());
is = std::shared_ptr<InputSource>(cis);
cis->stayOpen(true);
} else {
QTC::TC("qpdf", "QPDFJob keep files open y");
FileInputSource* fis = new FileInputSource();
is = std::shared_ptr<InputSource>(fis);
fis->setFilename(page_spec.filename.c_str());
}
std::shared_ptr<QPDF> qpdf_ph =
processInputSource(is, password, true);
page_heap.push_back(qpdf_ph);
page_spec_qpdfs[page_spec.filename] = qpdf_ph.get();
if (cis) {
cis->stayOpen(false);
page_spec_cfis[page_spec.filename] = cis;
}
}
// Read original pages from the PDF, and parse the page range
// associated with this occurrence of the file.
parsed_specs.push_back(
// line-break
QPDFPageData(
page_spec.filename,
page_spec_qpdfs[page_spec.filename],
page_spec.range));
}
std::map<unsigned long long, bool> remove_unreferenced;
if (m->remove_unreferenced_page_resources != QPDFJob::re_no) {
for (auto const& iter: page_spec_qpdfs) {
std::string const& filename = iter.first;
ClosedFileInputSource* cis = 0;
if (page_spec_cfis.count(filename)) {
cis = page_spec_cfis[filename];
cis->stayOpen(true);
}
QPDF& other(*(iter.second));
auto other_uuid = other.getUniqueId();
if (remove_unreferenced.count(other_uuid) == 0) {
remove_unreferenced[other_uuid] =
shouldRemoveUnreferencedResources(other);
}
if (cis) {
cis->stayOpen(false);
}
}
}
// Clear all pages out of the primary QPDF's pages tree but leave
// the objects in place in the file so they can be re-added
// without changing their object numbers. This enables other
// things in the original file, such as outlines, to continue to
// work.
doIfVerbose([&](std::ostream& cout, std::string const& prefix) {
cout << prefix << ": removing unreferenced pages from primary input"
<< std::endl;
});
QPDFPageDocumentHelper dh(pdf);
std::vector<QPDFPageObjectHelper> orig_pages = dh.getAllPages();
for (auto const& page: orig_pages) {
dh.removePage(page);
}
if (m->collate && (parsed_specs.size() > 1)) {
// Collate the pages by selecting one page from each spec in
// order. When a spec runs out of pages, stop selecting from
// it.
std::vector<QPDFPageData> new_parsed_specs;
size_t nspecs = parsed_specs.size();
size_t cur_page = 0;
bool got_pages = true;
while (got_pages) {
got_pages = false;
for (size_t i = 0; i < nspecs; ++i) {
QPDFPageData& page_data = parsed_specs.at(i);
for (size_t j = 0; j < m->collate; ++j) {
if (cur_page + j < page_data.selected_pages.size()) {
got_pages = true;
new_parsed_specs.push_back(
// line-break
QPDFPageData(
page_data,
page_data.selected_pages.at(cur_page + j)));
}
}
}
cur_page += m->collate;
}
parsed_specs = new_parsed_specs;
}
// Add all the pages from all the files in the order specified.
// Keep track of any pages from the original file that we are
// selecting.
std::set<int> selected_from_orig;
std::vector<QPDFObjectHandle> new_labels;
bool any_page_labels = false;
int out_pageno = 0;
std::map<unsigned long long, std::shared_ptr<QPDFAcroFormDocumentHelper>>
afdh_map;
auto this_afdh = get_afdh_for_qpdf(afdh_map, &pdf);
std::set<QPDFObjGen> referenced_fields;
for (auto& page_data: parsed_specs) {
ClosedFileInputSource* cis = 0;
if (page_spec_cfis.count(page_data.filename)) {
cis = page_spec_cfis[page_data.filename];
cis->stayOpen(true);
}
QPDFPageLabelDocumentHelper pldh(*page_data.qpdf);
auto other_afdh = get_afdh_for_qpdf(afdh_map, page_data.qpdf);
if (pldh.hasPageLabels()) {
any_page_labels = true;
}
doIfVerbose([&](std::ostream& cout, std::string const& prefix) {
cout << prefix << ": adding pages from " << page_data.filename
<< std::endl;
});
for (auto pageno_iter: page_data.selected_pages) {
// Pages are specified from 1 but numbered from 0 in the
// vector
int pageno = pageno_iter - 1;
pldh.getLabelsForPageRange(
pageno, pageno, out_pageno++, new_labels);
QPDFPageObjectHelper to_copy =
page_data.orig_pages.at(QIntC::to_size(pageno));
QPDFObjGen to_copy_og = to_copy.getObjectHandle().getObjGen();
unsigned long long from_uuid = page_data.qpdf->getUniqueId();
if (copied_pages[from_uuid].count(to_copy_og)) {
QTC::TC(
"qpdf",
"QPDFJob copy same page more than once",
(page_data.qpdf == &pdf) ? 0 : 1);
to_copy = to_copy.shallowCopyPage();
} else {
copied_pages[from_uuid].insert(to_copy_og);
if (remove_unreferenced[from_uuid]) {
to_copy.removeUnreferencedResources();
}
}
dh.addPage(to_copy, false);
bool first_copy_from_orig = false;
bool this_file = (page_data.qpdf == &pdf);
if (this_file) {
// This is a page from the original file. Keep track
// of the fact that we are using it.
first_copy_from_orig = (selected_from_orig.count(pageno) == 0);
selected_from_orig.insert(pageno);
}
auto new_page = added_page(pdf, to_copy);
// Try to avoid gratuitously renaming fields. In the case
// of where we're just extracting a bunch of pages from
// the original file and not copying any page more than
// once, there's no reason to do anything with the fields.
// Since we don't remove fields from the original file
// until all copy operations are completed, any foreign
// pages that conflict with original pages will be
// adjusted. If we copy any page from the original file
// more than once, that page would be in conflict with the
// previous copy of itself.
if (other_afdh->hasAcroForm() &&
((!this_file) || (!first_copy_from_orig))) {
if (!this_file) {
QTC::TC("qpdf", "QPDFJob copy fields not this file");
} else if (!first_copy_from_orig) {
QTC::TC("qpdf", "QPDFJob copy fields non-first from orig");
}
try {
this_afdh->fixCopiedAnnotations(
new_page,
to_copy.getObjectHandle(),
*other_afdh,
&referenced_fields);
} catch (std::exception& e) {
pdf.warn(
qpdf_e_damaged_pdf,
"",
0,
("Exception caught while fixing copied"
" annotations. This may be a qpdf bug. " +
std::string("Exception: ") + e.what()));
}
}
}
if (page_data.qpdf->anyWarnings()) {
warnings = true;
}
if (cis) {
cis->stayOpen(false);
}
}
if (any_page_labels) {
QPDFObjectHandle page_labels = QPDFObjectHandle::newDictionary();
page_labels.replaceKey("/Nums", QPDFObjectHandle::newArray(new_labels));
pdf.getRoot().replaceKey("/PageLabels", page_labels);
}
// Delete page objects for unused page in primary. This prevents
// those objects from being preserved by being referred to from
// other places, such as the outlines dictionary. Also make sure
// we keep form fields from pages we preserved.
for (size_t pageno = 0; pageno < orig_pages.size(); ++pageno) {
auto page = orig_pages.at(pageno);
if (selected_from_orig.count(QIntC::to_int(pageno))) {
for (auto field: this_afdh->getFormFieldsForPage(page)) {
QTC::TC("qpdf", "QPDFJob pages keeping field from original");
referenced_fields.insert(field.getObjectHandle().getObjGen());
}
} else {
pdf.replaceObject(
page.getObjectHandle().getObjGen(),
QPDFObjectHandle::newNull());
}
}
// Remove unreferenced form fields
if (this_afdh->hasAcroForm()) {
auto acroform = pdf.getRoot().getKey("/AcroForm");
auto fields = acroform.getKey("/Fields");
if (fields.isArray()) {
auto new_fields = QPDFObjectHandle::newArray();
if (fields.isIndirect()) {
new_fields = pdf.makeIndirectObject(new_fields);
}
for (auto const& field: fields.aitems()) {
if (referenced_fields.count(field.getObjGen())) {
new_fields.appendItem(field);
}
}
if (new_fields.getArrayNItems() > 0) {
QTC::TC("qpdf", "QPDFJob keep some fields in pages");
acroform.replaceKey("/Fields", new_fields);
} else {
QTC::TC("qpdf", "QPDFJob no more fields in pages");
pdf.getRoot().removeKey("/AcroForm");
}
}
}
}
void
QPDFJob::handleRotations(QPDF& pdf)
{
QPDFPageDocumentHelper dh(pdf);
std::vector<QPDFPageObjectHelper> pages = dh.getAllPages();
int npages = QIntC::to_int(pages.size());
for (auto const& iter: m->rotations) {
std::string const& range = iter.first;
QPDFJob::RotationSpec const& rspec = iter.second;
// range has been previously validated
std::vector<int> to_rotate =
QUtil::parse_numrange(range.c_str(), npages);
for (int pageno_iter: to_rotate) {
int pageno = pageno_iter - 1;
if ((pageno >= 0) && (pageno < npages)) {
pages.at(QIntC::to_size(pageno))
.rotatePage(rspec.angle, rspec.relative);
}
}
}
}
void
QPDFJob::maybeFixWritePassword(int R, std::string& password)
{
switch (m->password_mode) {
case QPDFJob::pm_bytes:
QTC::TC("qpdf", "QPDFJob password mode bytes");
break;
case QPDFJob::pm_hex_bytes:
QTC::TC("qpdf", "QPDFJob password mode hex-bytes");
password = QUtil::hex_decode(password);
break;
case QPDFJob::pm_unicode:
case QPDFJob::pm_auto:
{
bool has_8bit_chars;
bool is_valid_utf8;
bool is_utf16;
QUtil::analyze_encoding(
password, has_8bit_chars, is_valid_utf8, is_utf16);
if (!has_8bit_chars) {
return;
}
if (m->password_mode == QPDFJob::pm_unicode) {
if (!is_valid_utf8) {
QTC::TC("qpdf", "QPDFJob password not unicode");
throw std::runtime_error(
"supplied password is not valid UTF-8");
}
if (R < 5) {
std::string encoded;
if (!QUtil::utf8_to_pdf_doc(password, encoded)) {
QTC::TC("qpdf", "QPDFJob password not encodable");
throw std::runtime_error(
"supplied password cannot be encoded for"
" 40-bit or 128-bit encryption formats");
}
password = encoded;
}
} else {
if ((R < 5) && is_valid_utf8) {
std::string encoded;
if (QUtil::utf8_to_pdf_doc(password, encoded)) {
QTC::TC("qpdf", "QPDFJob auto-encode password");
doIfVerbose(
[&](std::ostream& cout, std::string const& prefix) {
cout << prefix
<< ": automatically converting Unicode"
<< " password to single-byte encoding as"
<< " required for 40-bit or 128-bit"
<< " encryption" << std::endl;
});
password = encoded;
} else {
QTC::TC("qpdf", "QPDFJob bytes fallback warning");
*(this->m->cerr)
<< this->m->message_prefix << ": WARNING: "
<< "supplied password looks like a Unicode"
<< " password with characters not allowed in"
<< " passwords for 40-bit and 128-bit encryption;"
<< " most readers will not be able to open this"
<< " file with the supplied password."
<< " (Use --password-mode=bytes to suppress this"
<< " warning and use the password anyway.)"
<< std::endl;
}
} else if ((R >= 5) && (!is_valid_utf8)) {
QTC::TC("qpdf", "QPDFJob invalid utf-8 in auto");
throw std::runtime_error(
"supplied password is not a valid Unicode password,"
" which is required for 256-bit encryption; to"
" really use this password, rerun with the"
" --password-mode=bytes option");
}
}
}
break;
}
}
void
QPDFJob::setEncryptionOptions(QPDF& pdf, QPDFWriter& w)
{
int R = 0;
if (m->keylen == 40) {
R = 2;
} else if (m->keylen == 128) {
if (m->force_V4 || m->cleartext_metadata || m->use_aes) {
R = 4;
} else {
R = 3;
}
} else if (m->keylen == 256) {
if (m->force_R5) {
R = 5;
} else {
R = 6;
}
} else {
throw std::logic_error("bad encryption keylen");
}
if ((R > 3) && (m->r3_accessibility == false)) {
*(this->m->cerr) << this->m->message_prefix
<< ": -accessibility=n is ignored for modern"
<< " encryption formats" << std::endl;
}
maybeFixWritePassword(R, m->user_password);
maybeFixWritePassword(R, m->owner_password);
if ((R < 4) || ((R == 4) && (!m->use_aes))) {
if (!m->allow_weak_crypto) {
QTC::TC("qpdf", "QPDFJob weak crypto error");
*(this->m->cerr)
<< this->m->message_prefix
<< ": refusing to write a file with RC4, a weak cryptographic "
"algorithm"
<< std::endl
<< "Please use 256-bit keys for better security." << std::endl
<< "Pass --allow-weak-crypto to enable writing insecure files."
<< std::endl
<< "See also "
"https://qpdf.readthedocs.io/en/stable/weak-crypto.html"
<< std::endl;
throw std::runtime_error(
"refusing to write a file with weak crypto");
}
}
switch (R) {
case 2:
w.setR2EncryptionParametersInsecure(
m->user_password.c_str(),
m->owner_password.c_str(),
m->r2_print,
m->r2_modify,
m->r2_extract,
m->r2_annotate);
break;
case 3:
w.setR3EncryptionParametersInsecure(
m->user_password.c_str(),
m->owner_password.c_str(),
m->r3_accessibility,
m->r3_extract,
m->r3_assemble,
m->r3_annotate_and_form,
m->r3_form_filling,
m->r3_modify_other,
m->r3_print);
break;
case 4:
w.setR4EncryptionParametersInsecure(
m->user_password.c_str(),
m->owner_password.c_str(),
m->r3_accessibility,
m->r3_extract,
m->r3_assemble,
m->r3_annotate_and_form,
m->r3_form_filling,
m->r3_modify_other,
m->r3_print,
!m->cleartext_metadata,
m->use_aes);
break;
case 5:
w.setR5EncryptionParameters(
m->user_password.c_str(),
m->owner_password.c_str(),
m->r3_accessibility,
m->r3_extract,
m->r3_assemble,
m->r3_annotate_and_form,
m->r3_form_filling,
m->r3_modify_other,
m->r3_print,
!m->cleartext_metadata);
break;
case 6:
w.setR6EncryptionParameters(
m->user_password.c_str(),
m->owner_password.c_str(),
m->r3_accessibility,
m->r3_extract,
m->r3_assemble,
m->r3_annotate_and_form,
m->r3_form_filling,
m->r3_modify_other,
m->r3_print,
!m->cleartext_metadata);
break;
default:
throw std::logic_error("bad encryption R value");
break;
}
}
static void
parse_version(
std::string const& full_version_string,
std::string& version,
int& extension_level)
{
auto vp = QUtil::make_unique_cstr(full_version_string);
char* v = vp.get();
char* p1 = strchr(v, '.');
char* p2 = (p1 ? strchr(1 + p1, '.') : 0);
if (p2 && *(p2 + 1)) {
*p2++ = '\0';
extension_level = QUtil::string_to_int(p2);
}
version = v;
}
void
QPDFJob::setWriterOptions(QPDF& pdf, QPDFWriter& w)
{
if (m->compression_level >= 0) {
Pl_Flate::setCompressionLevel(m->compression_level);
}
if (m->qdf_mode) {
w.setQDFMode(true);
}
if (m->preserve_unreferenced_objects) {
w.setPreserveUnreferencedObjects(true);
}
if (m->newline_before_endstream) {
w.setNewlineBeforeEndstream(true);
}
if (m->normalize_set) {
w.setContentNormalization(m->normalize);
}
if (m->stream_data_set) {
w.setStreamDataMode(m->stream_data_mode);
}
if (m->compress_streams_set) {
w.setCompressStreams(m->compress_streams);
}
if (m->recompress_flate_set) {
w.setRecompressFlate(m->recompress_flate);
}
if (m->decode_level_set) {
w.setDecodeLevel(m->decode_level);
}
if (m->decrypt) {
w.setPreserveEncryption(false);
}
if (m->deterministic_id) {
w.setDeterministicID(true);
}
if (m->static_id) {
w.setStaticID(true);
}
if (m->static_aes_iv) {
w.setStaticAesIV(true);
}
if (m->suppress_original_object_id) {
w.setSuppressOriginalObjectIDs(true);
}
if (m->copy_encryption) {
std::shared_ptr<QPDF> encryption_pdf = processFile(
m->encryption_file.c_str(),
m->encryption_file_password.get(),
false);
w.copyEncryptionParameters(*encryption_pdf);
}
if (m->encrypt) {
setEncryptionOptions(pdf, w);
}
if (m->linearize) {
w.setLinearization(true);
}
if (!m->linearize_pass1.empty()) {
w.setLinearizationPass1Filename(m->linearize_pass1);
}
if (m->object_stream_set) {
w.setObjectStreamMode(m->object_stream_mode);
}
w.setMinimumPDFVersion(this->m->max_input_version);
if (!m->min_version.empty()) {
std::string version;
int extension_level = 0;
parse_version(m->min_version, version, extension_level);
w.setMinimumPDFVersion(version, extension_level);
}
if (!m->force_version.empty()) {
std::string version;
int extension_level = 0;
parse_version(m->force_version, version, extension_level);
w.forcePDFVersion(version, extension_level);
}
if (m->progress && m->outfilename) {
w.registerProgressReporter(
std::shared_ptr<QPDFWriter::ProgressReporter>(
// line-break
new ProgressReporter(
*(this->m->cout),
this->m->message_prefix,
m->outfilename.get())));
}
}
void
QPDFJob::doSplitPages(QPDF& pdf, bool& warnings)
{
// Generate output file pattern
std::string before;
std::string after;
size_t len = strlen(m->outfilename.get());
char* num_spot = strstr(const_cast<char*>(m->outfilename.get()), "%d");
if (num_spot != 0) {
QTC::TC("qpdf", "QPDFJob split-pages %d");
before = std::string(
m->outfilename.get(),
QIntC::to_size(num_spot - m->outfilename.get()));
after = num_spot + 2;
} else if (
(len >= 4) &&
(QUtil::str_compare_nocase(m->outfilename.get() + len - 4, ".pdf") ==
0)) {
QTC::TC("qpdf", "QPDFJob split-pages .pdf");
before = std::string(m->outfilename.get(), len - 4) + "-";
after = m->outfilename.get() + len - 4;
} else {
QTC::TC("qpdf", "QPDFJob split-pages other");
before = std::string(m->outfilename.get()) + "-";
}
if (shouldRemoveUnreferencedResources(pdf)) {
QPDFPageDocumentHelper dh(pdf);
dh.removeUnreferencedResources();
}
QPDFPageLabelDocumentHelper pldh(pdf);
QPDFAcroFormDocumentHelper afdh(pdf);
std::vector<QPDFObjectHandle> const& pages = pdf.getAllPages();
size_t pageno_len = QUtil::uint_to_string(pages.size()).length();
size_t num_pages = pages.size();
for (size_t i = 0; i < num_pages; i += QIntC::to_size(m->split_pages)) {
size_t first = i + 1;
size_t last = i + QIntC::to_size(m->split_pages);
if (last > num_pages) {
last = num_pages;
}
QPDF outpdf;
outpdf.emptyPDF();
std::shared_ptr<QPDFAcroFormDocumentHelper> out_afdh;
if (afdh.hasAcroForm()) {
out_afdh = std::make_shared<QPDFAcroFormDocumentHelper>(outpdf);
}
if (m->suppress_warnings) {
outpdf.setSuppressWarnings(true);
}
for (size_t pageno = first; pageno <= last; ++pageno) {
QPDFObjectHandle page = pages.at(pageno - 1);
outpdf.addPage(page, false);
auto new_page = added_page(outpdf, page);
if (out_afdh.get()) {
QTC::TC("qpdf", "QPDFJob copy form fields in split_pages");
try {
out_afdh->fixCopiedAnnotations(new_page, page, afdh);
} catch (std::exception& e) {
pdf.warn(
qpdf_e_damaged_pdf,
"",
0,
("Exception caught while fixing copied"
" annotations. This may be a qpdf bug." +
std::string("Exception: ") + e.what()));
}
}
}
if (pldh.hasPageLabels()) {
std::vector<QPDFObjectHandle> labels;
pldh.getLabelsForPageRange(
QIntC::to_longlong(first - 1),
QIntC::to_longlong(last - 1),
0,
labels);
QPDFObjectHandle page_labels = QPDFObjectHandle::newDictionary();
page_labels.replaceKey("/Nums", QPDFObjectHandle::newArray(labels));
outpdf.getRoot().replaceKey("/PageLabels", page_labels);
}
std::string page_range =
QUtil::uint_to_string(first, QIntC::to_int(pageno_len));
if (m->split_pages > 1) {
page_range +=
"-" + QUtil::uint_to_string(last, QIntC::to_int(pageno_len));
}
std::string outfile = before + page_range + after;
if (QUtil::same_file(m->infilename.get(), outfile.c_str())) {
throw std::runtime_error(
"split pages would overwrite input file with " + outfile);
}
QPDFWriter w(outpdf, outfile.c_str());
setWriterOptions(outpdf, w);
w.write();
doIfVerbose([&](std::ostream& cout, std::string const& prefix) {
cout << prefix << ": wrote file " << outfile << std::endl;
});
if (outpdf.anyWarnings()) {
warnings = true;
}
}
}
void
QPDFJob::writeOutfile(QPDF& pdf)
{
std::shared_ptr<char> temp_out;
if (m->replace_input) {
// Append but don't prepend to the path to generate a
// temporary name. This saves us from having to split the path
// by directory and non-directory.
temp_out = QUtil::make_shared_cstr(
std::string(m->infilename.get()) + ".~qpdf-temp#");
// m->outfilename will be restored to 0 before temp_out
// goes out of scope.
m->outfilename = temp_out;
} else if (strcmp(m->outfilename.get(), "-") == 0) {
m->outfilename = 0;
}
{
// Private scope so QPDFWriter will close the output file
QPDFWriter w(pdf, m->outfilename.get());
setWriterOptions(pdf, w);
w.write();
}
if (m->outfilename) {
doIfVerbose([&](std::ostream& cout, std::string const& prefix) {
cout << prefix << ": wrote file " << m->outfilename << std::endl;
});
}
if (m->replace_input) {
m->outfilename = 0;
}
if (m->replace_input) {
// We must close the input before we can rename files
pdf.closeInputSource();
std::string backup = std::string(m->infilename.get()) + ".~qpdf-orig";
bool warnings = pdf.anyWarnings();
if (!warnings) {
backup.append(1, '#');
}
QUtil::rename_file(m->infilename.get(), backup.c_str());
QUtil::rename_file(temp_out.get(), m->infilename.get());
if (warnings) {
*(this->m->cerr) << this->m->message_prefix
<< ": there are warnings; original file kept in "
<< backup << std::endl;
} else {
try {
QUtil::remove_file(backup.c_str());
} catch (QPDFSystemError& e) {
*(this->m->cerr)
<< this->m->message_prefix
<< ": unable to delete original file (" << e.what() << ");"
<< " original file left in " << backup
<< ", but the input was successfully replaced" << std::endl;
}
}
}
}
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