mirror of
https://github.com/octoleo/restic.git
synced 2024-11-26 23:06:32 +00:00
389 lines
9.9 KiB
Go
389 lines
9.9 KiB
Go
// Copyright 2010 The Go Authors. All rights reserved.
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file.
|
|
|
|
package html
|
|
|
|
import (
|
|
"bufio"
|
|
"bytes"
|
|
"errors"
|
|
"fmt"
|
|
"io"
|
|
"io/ioutil"
|
|
"os"
|
|
"path/filepath"
|
|
"runtime"
|
|
"sort"
|
|
"strings"
|
|
"testing"
|
|
|
|
"golang.org/x/net/html/atom"
|
|
)
|
|
|
|
// readParseTest reads a single test case from r.
|
|
func readParseTest(r *bufio.Reader) (text, want, context string, err error) {
|
|
line, err := r.ReadSlice('\n')
|
|
if err != nil {
|
|
return "", "", "", err
|
|
}
|
|
var b []byte
|
|
|
|
// Read the HTML.
|
|
if string(line) != "#data\n" {
|
|
return "", "", "", fmt.Errorf(`got %q want "#data\n"`, line)
|
|
}
|
|
for {
|
|
line, err = r.ReadSlice('\n')
|
|
if err != nil {
|
|
return "", "", "", err
|
|
}
|
|
if line[0] == '#' {
|
|
break
|
|
}
|
|
b = append(b, line...)
|
|
}
|
|
text = strings.TrimSuffix(string(b), "\n")
|
|
b = b[:0]
|
|
|
|
// Skip the error list.
|
|
if string(line) != "#errors\n" {
|
|
return "", "", "", fmt.Errorf(`got %q want "#errors\n"`, line)
|
|
}
|
|
for {
|
|
line, err = r.ReadSlice('\n')
|
|
if err != nil {
|
|
return "", "", "", err
|
|
}
|
|
if line[0] == '#' {
|
|
break
|
|
}
|
|
}
|
|
|
|
if string(line) == "#document-fragment\n" {
|
|
line, err = r.ReadSlice('\n')
|
|
if err != nil {
|
|
return "", "", "", err
|
|
}
|
|
context = strings.TrimSpace(string(line))
|
|
line, err = r.ReadSlice('\n')
|
|
if err != nil {
|
|
return "", "", "", err
|
|
}
|
|
}
|
|
|
|
// Read the dump of what the parse tree should be.
|
|
if string(line) != "#document\n" {
|
|
return "", "", "", fmt.Errorf(`got %q want "#document\n"`, line)
|
|
}
|
|
inQuote := false
|
|
for {
|
|
line, err = r.ReadSlice('\n')
|
|
if err != nil && err != io.EOF {
|
|
return "", "", "", err
|
|
}
|
|
trimmed := bytes.Trim(line, "| \n")
|
|
if len(trimmed) > 0 {
|
|
if line[0] == '|' && trimmed[0] == '"' {
|
|
inQuote = true
|
|
}
|
|
if trimmed[len(trimmed)-1] == '"' && !(line[0] == '|' && len(trimmed) == 1) {
|
|
inQuote = false
|
|
}
|
|
}
|
|
if len(line) == 0 || len(line) == 1 && line[0] == '\n' && !inQuote {
|
|
break
|
|
}
|
|
b = append(b, line...)
|
|
}
|
|
return text, string(b), context, nil
|
|
}
|
|
|
|
func dumpIndent(w io.Writer, level int) {
|
|
io.WriteString(w, "| ")
|
|
for i := 0; i < level; i++ {
|
|
io.WriteString(w, " ")
|
|
}
|
|
}
|
|
|
|
type sortedAttributes []Attribute
|
|
|
|
func (a sortedAttributes) Len() int {
|
|
return len(a)
|
|
}
|
|
|
|
func (a sortedAttributes) Less(i, j int) bool {
|
|
if a[i].Namespace != a[j].Namespace {
|
|
return a[i].Namespace < a[j].Namespace
|
|
}
|
|
return a[i].Key < a[j].Key
|
|
}
|
|
|
|
func (a sortedAttributes) Swap(i, j int) {
|
|
a[i], a[j] = a[j], a[i]
|
|
}
|
|
|
|
func dumpLevel(w io.Writer, n *Node, level int) error {
|
|
dumpIndent(w, level)
|
|
switch n.Type {
|
|
case ErrorNode:
|
|
return errors.New("unexpected ErrorNode")
|
|
case DocumentNode:
|
|
return errors.New("unexpected DocumentNode")
|
|
case ElementNode:
|
|
if n.Namespace != "" {
|
|
fmt.Fprintf(w, "<%s %s>", n.Namespace, n.Data)
|
|
} else {
|
|
fmt.Fprintf(w, "<%s>", n.Data)
|
|
}
|
|
attr := sortedAttributes(n.Attr)
|
|
sort.Sort(attr)
|
|
for _, a := range attr {
|
|
io.WriteString(w, "\n")
|
|
dumpIndent(w, level+1)
|
|
if a.Namespace != "" {
|
|
fmt.Fprintf(w, `%s %s="%s"`, a.Namespace, a.Key, a.Val)
|
|
} else {
|
|
fmt.Fprintf(w, `%s="%s"`, a.Key, a.Val)
|
|
}
|
|
}
|
|
case TextNode:
|
|
fmt.Fprintf(w, `"%s"`, n.Data)
|
|
case CommentNode:
|
|
fmt.Fprintf(w, "<!-- %s -->", n.Data)
|
|
case DoctypeNode:
|
|
fmt.Fprintf(w, "<!DOCTYPE %s", n.Data)
|
|
if n.Attr != nil {
|
|
var p, s string
|
|
for _, a := range n.Attr {
|
|
switch a.Key {
|
|
case "public":
|
|
p = a.Val
|
|
case "system":
|
|
s = a.Val
|
|
}
|
|
}
|
|
if p != "" || s != "" {
|
|
fmt.Fprintf(w, ` "%s"`, p)
|
|
fmt.Fprintf(w, ` "%s"`, s)
|
|
}
|
|
}
|
|
io.WriteString(w, ">")
|
|
case scopeMarkerNode:
|
|
return errors.New("unexpected scopeMarkerNode")
|
|
default:
|
|
return errors.New("unknown node type")
|
|
}
|
|
io.WriteString(w, "\n")
|
|
for c := n.FirstChild; c != nil; c = c.NextSibling {
|
|
if err := dumpLevel(w, c, level+1); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func dump(n *Node) (string, error) {
|
|
if n == nil || n.FirstChild == nil {
|
|
return "", nil
|
|
}
|
|
var b bytes.Buffer
|
|
for c := n.FirstChild; c != nil; c = c.NextSibling {
|
|
if err := dumpLevel(&b, c, 0); err != nil {
|
|
return "", err
|
|
}
|
|
}
|
|
return b.String(), nil
|
|
}
|
|
|
|
const testDataDir = "testdata/webkit/"
|
|
|
|
func TestParser(t *testing.T) {
|
|
testFiles, err := filepath.Glob(testDataDir + "*.dat")
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
for _, tf := range testFiles {
|
|
f, err := os.Open(tf)
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
defer f.Close()
|
|
r := bufio.NewReader(f)
|
|
|
|
for i := 0; ; i++ {
|
|
text, want, context, err := readParseTest(r)
|
|
if err == io.EOF {
|
|
break
|
|
}
|
|
if err != nil {
|
|
t.Fatal(err)
|
|
}
|
|
|
|
err = testParseCase(text, want, context)
|
|
|
|
if err != nil {
|
|
t.Errorf("%s test #%d %q, %s", tf, i, text, err)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
// testParseCase tests one test case from the test files. If the test does not
|
|
// pass, it returns an error that explains the failure.
|
|
// text is the HTML to be parsed, want is a dump of the correct parse tree,
|
|
// and context is the name of the context node, if any.
|
|
func testParseCase(text, want, context string) (err error) {
|
|
defer func() {
|
|
if x := recover(); x != nil {
|
|
switch e := x.(type) {
|
|
case error:
|
|
err = e
|
|
default:
|
|
err = fmt.Errorf("%v", e)
|
|
}
|
|
}
|
|
}()
|
|
|
|
var doc *Node
|
|
if context == "" {
|
|
doc, err = Parse(strings.NewReader(text))
|
|
if err != nil {
|
|
return err
|
|
}
|
|
} else {
|
|
contextNode := &Node{
|
|
Type: ElementNode,
|
|
DataAtom: atom.Lookup([]byte(context)),
|
|
Data: context,
|
|
}
|
|
nodes, err := ParseFragment(strings.NewReader(text), contextNode)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
doc = &Node{
|
|
Type: DocumentNode,
|
|
}
|
|
for _, n := range nodes {
|
|
doc.AppendChild(n)
|
|
}
|
|
}
|
|
|
|
if err := checkTreeConsistency(doc); err != nil {
|
|
return err
|
|
}
|
|
|
|
got, err := dump(doc)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
// Compare the parsed tree to the #document section.
|
|
if got != want {
|
|
return fmt.Errorf("got vs want:\n----\n%s----\n%s----", got, want)
|
|
}
|
|
|
|
if renderTestBlacklist[text] || context != "" {
|
|
return nil
|
|
}
|
|
|
|
// Check that rendering and re-parsing results in an identical tree.
|
|
pr, pw := io.Pipe()
|
|
go func() {
|
|
pw.CloseWithError(Render(pw, doc))
|
|
}()
|
|
doc1, err := Parse(pr)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
got1, err := dump(doc1)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
if got != got1 {
|
|
return fmt.Errorf("got vs got1:\n----\n%s----\n%s----", got, got1)
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// Some test input result in parse trees are not 'well-formed' despite
|
|
// following the HTML5 recovery algorithms. Rendering and re-parsing such a
|
|
// tree will not result in an exact clone of that tree. We blacklist such
|
|
// inputs from the render test.
|
|
var renderTestBlacklist = map[string]bool{
|
|
// The second <a> will be reparented to the first <table>'s parent. This
|
|
// results in an <a> whose parent is an <a>, which is not 'well-formed'.
|
|
`<a><table><td><a><table></table><a></tr><a></table><b>X</b>C<a>Y`: true,
|
|
// The same thing with a <p>:
|
|
`<p><table></p>`: true,
|
|
// More cases of <a> being reparented:
|
|
`<a href="blah">aba<table><a href="foo">br<tr><td></td></tr>x</table>aoe`: true,
|
|
`<a><table><a></table><p><a><div><a>`: true,
|
|
`<a><table><td><a><table></table><a></tr><a></table><a>`: true,
|
|
// A similar reparenting situation involving <nobr>:
|
|
`<!DOCTYPE html><body><b><nobr>1<table><nobr></b><i><nobr>2<nobr></i>3`: true,
|
|
// A <plaintext> element is reparented, putting it before a table.
|
|
// A <plaintext> element can't have anything after it in HTML.
|
|
`<table><plaintext><td>`: true,
|
|
`<!doctype html><table><plaintext></plaintext>`: true,
|
|
`<!doctype html><table><tbody><plaintext></plaintext>`: true,
|
|
`<!doctype html><table><tbody><tr><plaintext></plaintext>`: true,
|
|
// A form inside a table inside a form doesn't work either.
|
|
`<!doctype html><form><table></form><form></table></form>`: true,
|
|
// A script that ends at EOF may escape its own closing tag when rendered.
|
|
`<!doctype html><script><!--<script `: true,
|
|
`<!doctype html><script><!--<script <`: true,
|
|
`<!doctype html><script><!--<script <a`: true,
|
|
`<!doctype html><script><!--<script </`: true,
|
|
`<!doctype html><script><!--<script </s`: true,
|
|
`<!doctype html><script><!--<script </script`: true,
|
|
`<!doctype html><script><!--<script </scripta`: true,
|
|
`<!doctype html><script><!--<script -`: true,
|
|
`<!doctype html><script><!--<script -a`: true,
|
|
`<!doctype html><script><!--<script -<`: true,
|
|
`<!doctype html><script><!--<script --`: true,
|
|
`<!doctype html><script><!--<script --a`: true,
|
|
`<!doctype html><script><!--<script --<`: true,
|
|
`<script><!--<script `: true,
|
|
`<script><!--<script <a`: true,
|
|
`<script><!--<script </script`: true,
|
|
`<script><!--<script </scripta`: true,
|
|
`<script><!--<script -`: true,
|
|
`<script><!--<script -a`: true,
|
|
`<script><!--<script --`: true,
|
|
`<script><!--<script --a`: true,
|
|
`<script><!--<script <`: true,
|
|
`<script><!--<script </`: true,
|
|
`<script><!--<script </s`: true,
|
|
// Reconstructing the active formatting elements results in a <plaintext>
|
|
// element that contains an <a> element.
|
|
`<!doctype html><p><a><plaintext>b`: true,
|
|
}
|
|
|
|
func TestNodeConsistency(t *testing.T) {
|
|
// inconsistentNode is a Node whose DataAtom and Data do not agree.
|
|
inconsistentNode := &Node{
|
|
Type: ElementNode,
|
|
DataAtom: atom.Frameset,
|
|
Data: "table",
|
|
}
|
|
_, err := ParseFragment(strings.NewReader("<p>hello</p>"), inconsistentNode)
|
|
if err == nil {
|
|
t.Errorf("got nil error, want non-nil")
|
|
}
|
|
}
|
|
|
|
func BenchmarkParser(b *testing.B) {
|
|
buf, err := ioutil.ReadFile("testdata/go1.html")
|
|
if err != nil {
|
|
b.Fatalf("could not read testdata/go1.html: %v", err)
|
|
}
|
|
b.SetBytes(int64(len(buf)))
|
|
runtime.GC()
|
|
b.ReportAllocs()
|
|
b.ResetTimer()
|
|
for i := 0; i < b.N; i++ {
|
|
Parse(bytes.NewBuffer(buf))
|
|
}
|
|
}
|