diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..d511905 --- /dev/null +++ b/COPYING @@ -0,0 +1,339 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +License is intended to guarantee your freedom to share and change free +software--to make sure the software is free for all its users. This +General Public License applies to most of the Free Software +Foundation's software and to any other program whose authors commit to +using it. (Some other Free Software Foundation software is covered by +the GNU Lesser General Public License instead.) You can apply it to +your programs, too. + + When we speak of free software, we are referring to freedom, not +price. Our General Public Licenses are designed to make sure that you +have the freedom to distribute copies of free software (and charge for +this service if you wish), that you receive source code or can get it +if you want it, that you can change the software or use pieces of it +in new free programs; and that you know you can do these things. + + To protect your rights, we need to make restrictions that forbid +anyone to deny you these rights or to ask you to surrender the rights. +These restrictions translate to certain responsibilities for you if you +distribute copies of the software, or if you modify it. + + For example, if you distribute copies of such a program, whether +gratis or for a fee, you must give the recipients all the rights that +you have. You must make sure that they, too, receive or can get the +source code. And you must show them these terms so they know their +rights. + + We protect your rights with two steps: (1) copyright the software, and +(2) offer you this license which gives you legal permission to copy, +distribute and/or modify the software. + + Also, for each author's protection and ours, we want to make certain +that everyone understands that there is no warranty for this free +software. If the software is modified by someone else and passed on, we +want its recipients to know that what they have is not the original, so +that any problems introduced by others will not reflect on the original +authors' reputations. + + Finally, any free program is threatened constantly by software +patents. We wish to avoid the danger that redistributors of a free +program will individually obtain patent licenses, in effect making the +program proprietary. To prevent this, we have made it clear that any +patent must be licensed for everyone's free use or not licensed at all. + + The precise terms and conditions for copying, distribution and +modification follow. + + GNU GENERAL PUBLIC LICENSE + TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION + + 0. This License applies to any program or other work which contains +a notice placed by the copyright holder saying it may be distributed +under the terms of this General Public License. The "Program", below, +refers to any such program or work, and a "work based on the Program" +means either the Program or any derivative work under copyright law: +that is to say, a work containing the Program or a portion of it, +either verbatim or with modifications and/or translated into another +language. (Hereinafter, translation is included without limitation in +the term "modification".) Each licensee is addressed as "you". + +Activities other than copying, distribution and modification are not +covered by this License; they are outside its scope. The act of +running the Program is not restricted, and the output from the Program +is covered only if its contents constitute a work based on the +Program (independent of having been made by running the Program). +Whether that is true depends on what the Program does. + + 1. You may copy and distribute verbatim copies of the Program's +source code as you receive it, in any medium, provided that you +conspicuously and appropriately publish on each copy an appropriate +copyright notice and disclaimer of warranty; keep intact all the +notices that refer to this License and to the absence of any warranty; +and give any other recipients of the Program a copy of this License +along with the Program. + +You may charge a fee for the physical act of transferring a copy, and +you may at your option offer warranty protection in exchange for a fee. + + 2. You may modify your copy or copies of the Program or any portion +of it, thus forming a work based on the Program, and copy and +distribute such modifications or work under the terms of Section 1 +above, provided that you also meet all of these conditions: + + a) You must cause the modified files to carry prominent notices + stating that you changed the files and the date of any change. + + b) You must cause any work that you distribute or publish, that in + whole or in part contains or is derived from the Program or any + part thereof, to be licensed as a whole at no charge to all third + parties under the terms of this License. + + c) If the modified program normally reads commands interactively + when run, you must cause it, when started running for such + interactive use in the most ordinary way, to print or display an + announcement including an appropriate copyright notice and a + notice that there is no warranty (or else, saying that you provide + a warranty) and that users may redistribute the program under + these conditions, and telling the user how to view a copy of this + License. (Exception: if the Program itself is interactive but + does not normally print such an announcement, your work based on + the Program is not required to print an announcement.) + +These requirements apply to the modified work as a whole. If +identifiable sections of that work are not derived from the Program, +and can be reasonably considered independent and separate works in +themselves, then this License, and its terms, do not apply to those +sections when you distribute them as separate works. But when you +distribute the same sections as part of a whole which is a work based +on the Program, the distribution of the whole must be on the terms of +this License, whose permissions for other licensees extend to the +entire whole, and thus to each and every part regardless of who wrote it. + +Thus, it is not the intent of this section to claim rights or contest +your rights to work written entirely by you; rather, the intent is to +exercise the right to control the distribution of derivative or +collective works based on the Program. + +In addition, mere aggregation of another work not based on the Program +with the Program (or with a work based on the Program) on a volume of +a storage or distribution medium does not bring the other work under +the scope of this License. + + 3. You may copy and distribute the Program (or a work based on it, +under Section 2) in object code or executable form under the terms of +Sections 1 and 2 above provided that you also do one of the following: + + a) Accompany it with the complete corresponding machine-readable + source code, which must be distributed under the terms of Sections + 1 and 2 above on a medium customarily used for software interchange; or, + + b) Accompany it with a written offer, valid for at least three + years, to give any third party, for a charge no more than your + cost of physically performing source distribution, a complete + machine-readable copy of the corresponding source code, to be + distributed under the terms of Sections 1 and 2 above on a medium + customarily used for software interchange; or, + + c) Accompany it with the information you received as to the offer + to distribute corresponding source code. (This alternative is + allowed only for noncommercial distribution and only if you + received the program in object code or executable form with such + an offer, in accord with Subsection b above.) + +The source code for a work means the preferred form of the work for +making modifications to it. For an executable work, complete source +code means all the source code for all modules it contains, plus any +associated interface definition files, plus the scripts used to +control compilation and installation of the executable. However, as a +special exception, the source code distributed need not include +anything that is normally distributed (in either source or binary +form) with the major components (compiler, kernel, and so on) of the +operating system on which the executable runs, unless that component +itself accompanies the executable. + +If distribution of executable or object code is made by offering +access to copy from a designated place, then offering equivalent +access to copy the source code from the same place counts as +distribution of the source code, even though third parties are not +compelled to copy the source along with the object code. + + 4. You may not copy, modify, sublicense, or distribute the Program +except as expressly provided under this License. Any attempt +otherwise to copy, modify, sublicense or distribute the Program is +void, and will automatically terminate your rights under this License. +However, parties who have received copies, or rights, from you under +this License will not have their licenses terminated so long as such +parties remain in full compliance. + + 5. You are not required to accept this License, since you have not +signed it. However, nothing else grants you permission to modify or +distribute the Program or its derivative works. These actions are +prohibited by law if you do not accept this License. Therefore, by +modifying or distributing the Program (or any work based on the +Program), you indicate your acceptance of this License to do so, and +all its terms and conditions for copying, distributing or modifying +the Program or works based on it. + + 6. Each time you redistribute the Program (or any work based on the +Program), the recipient automatically receives a license from the +original licensor to copy, distribute or modify the Program subject to +these terms and conditions. You may not impose any further +restrictions on the recipients' exercise of the rights granted herein. +You are not responsible for enforcing compliance by third parties to +this License. + + 7. If, as a consequence of a court judgment or allegation of patent +infringement or for any other reason (not limited to patent issues), +conditions are imposed on you (whether by court order, agreement or +otherwise) that contradict the conditions of this License, they do not +excuse you from the conditions of this License. If you cannot +distribute so as to satisfy simultaneously your obligations under this +License and any other pertinent obligations, then as a consequence you +may not distribute the Program at all. For example, if a patent +license would not permit royalty-free redistribution of the Program by +all those who receive copies directly or indirectly through you, then +the only way you could satisfy both it and this License would be to +refrain entirely from distribution of the Program. + +If any portion of this section is held invalid or unenforceable under +any particular circumstance, the balance of the section is intended to +apply and the section as a whole is intended to apply in other +circumstances. + +It is not the purpose of this section to induce you to infringe any +patents or other property right claims or to contest validity of any +such claims; this section has the sole purpose of protecting the +integrity of the free software distribution system, which is +implemented by public license practices. Many people have made +generous contributions to the wide range of software distributed +through that system in reliance on consistent application of that +system; it is up to the author/donor to decide if he or she is willing +to distribute software through any other system and a licensee cannot +impose that choice. + +This section is intended to make thoroughly clear what is believed to +be a consequence of the rest of this License. + + 8. If the distribution and/or use of the Program is restricted in +certain countries either by patents or by copyrighted interfaces, the +original copyright holder who places the Program under this License +may add an explicit geographical distribution limitation excluding +those countries, so that distribution is permitted only in or among +countries not thus excluded. In such case, this License incorporates +the limitation as if written in the body of this License. + + 9. The Free Software Foundation may publish revised and/or new versions +of the General Public License from time to time. Such new versions will +be similar in spirit to the present version, but may differ in detail to +address new problems or concerns. + +Each version is given a distinguishing version number. If the Program +specifies a version number of this License which applies to it and "any +later version", you have the option of following the terms and conditions +either of that version or of any later version published by the Free +Software Foundation. If the Program does not specify a version number of +this License, you may choose any version ever published by the Free Software +Foundation. + + 10. If you wish to incorporate parts of the Program into other free +programs whose distribution conditions are different, write to the author +to ask for permission. For software which is copyrighted by the Free +Software Foundation, write to the Free Software Foundation; we sometimes +make exceptions for this. Our decision will be guided by the two goals +of preserving the free status of all derivatives of our free software and +of promoting the sharing and reuse of software generally. + + NO WARRANTY + + 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY +FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN +OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES +PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED +OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF +MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS +TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE +PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, +REPAIR OR CORRECTION. + + 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING +WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR +REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, +INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING +OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED +TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY +YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER +PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE +POSSIBILITY OF SUCH DAMAGES. + + END OF TERMS AND CONDITIONS + + How to Apply These Terms to Your New Programs + + If you develop a new program, and you want it to be of the greatest +possible use to the public, the best way to achieve this is to make it +free software which everyone can redistribute and change under these terms. + + To do so, attach the following notices to the program. It is safest +to attach them to the start of each source file to most effectively +convey the exclusion of warranty; and each file should have at least +the "copyright" line and a pointer to where the full notice is found. + + + Copyright (C) + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along + with this program; if not, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + +Also add information on how to contact you by electronic and paper mail. + +If the program is interactive, make it output a short notice like this +when it starts in an interactive mode: + + Gnomovision version 69, Copyright (C) year name of author + Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + , 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..2d02d29 --- /dev/null +++ b/Makefile @@ -0,0 +1,6 @@ +all: + g++ -Wall $(shell pkg-config fuse --cflags --libs) -lcurl $(shell xml2-config --cflags --libs) -ggdb s3fs.cpp -o s3fs + @echo ok! + +clean: + rm -f s3fs s3fs.o diff --git a/s3fs.cpp b/s3fs.cpp new file mode 100644 index 0000000..e441c21 --- /dev/null +++ b/s3fs.cpp @@ -0,0 +1,807 @@ +/* + * s3fs - FUSE filesystem backed by Amazon S3 + * + * Copyright 2007 Randy Rizun + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#define FUSE_USE_VERSION 26 + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include + +using namespace std; + +class auto_lock { + pthread_mutex_t& lock; +public: + auto_lock(pthread_mutex_t& lock): lock(lock) { + pthread_mutex_lock(&lock); + } + ~auto_lock() { + pthread_mutex_unlock(&lock); + } +}; + +stack curl_handles; +static pthread_mutex_t curl_handles_lock; + +class auto_curl { + CURL* curl; +public: + auto_curl() { + auto_lock lock(curl_handles_lock); + if (curl_handles.size() == 0) + curl = curl_easy_init(); + else { + curl = curl_handles.top(); + curl_handles.pop(); + } + curl_easy_reset(curl); + long seconds = 10; + curl_easy_setopt(curl, CURLOPT_CONNECTTIMEOUT, seconds); + } + ~auto_curl() { + auto_lock lock(curl_handles_lock); + curl_handles.push(curl); + } + CURL* get() const { + return curl; + } + operator CURL*() const { + return curl; + } +}; + +class auto_curl_slist { + struct curl_slist* slist; +public: + auto_curl_slist(): slist(0) { + } + ~auto_curl_slist() { + curl_slist_free_all(slist); + } + struct curl_slist* get() const { + return slist; + } + void append(const string& s) { + slist = curl_slist_append(slist, s.c_str()); + } +}; + +static string bucket; +static string AWSAccessKeyId; +static string AWSSecretAccessKey; +static const string host = "http://s3.amazonaws.com"; + +// key=path +typedef map stat_cache_t; +static stat_cache_t stat_cache; +static pthread_mutex_t stat_cache_lock; + +static const char hexAlphabet[] = "0123456789ABCDEF"; + +/** + * urlEncode a fuse path, + * taking into special consideration "/", + * otherwise regular urlEncode. + */ +string +urlEncode(const string &s) { + string result; + for (unsigned i = 0; i < s.length(); ++i) { + if (s[i] == '/') // Note- special case for fuse paths... + result += s[i]; + else if (isalnum(s[i])) + result += s[i]; + else if (s[i] == '.' || s[i] == '-' || s[i] == '*' || s[i] == '_') + result += s[i]; + else if (s[i] == ' ') + result += '+'; + else { + result += "%"; + result += hexAlphabet[static_cast(s[i]) / 16]; + result += hexAlphabet[static_cast(s[i]) % 16]; + } + } + return result; +} + +#include +#include +#include +#include + +static const EVP_MD* evp_md = EVP_sha1(); + +/** + * Returns the current date + * in a format suitable for a HTTP request header. + */ +string +get_date() { + char buf[100]; + time_t t = time(NULL); + strftime(buf, sizeof(buf), "%a, %d %b %Y %H:%M:%S +0000", gmtime(&t)); + return buf; +} + +/** + * Returns the Amazon AWS signature for the given parameters. + * + * @param method e.g., "GET" + * @param content_type e.g., "application/x-directory" + * @param date e.g., get_date() + * @param resource e.g., "/pub" + */ +string +calc_signature(string method, string content_type, string date, string resource) { + string Signature; + string StringToSign; + StringToSign += method + "\n"; + StringToSign += "\n"; + StringToSign += content_type + "\n"; + StringToSign += date + "\n"; + StringToSign += resource; + + const void* key = AWSSecretAccessKey.data(); + int key_len = AWSSecretAccessKey.size(); + const unsigned char* d = reinterpret_cast(StringToSign.data()); + int n = StringToSign.size(); + unsigned int md_len; + unsigned char md[EVP_MAX_MD_SIZE]; + + HMAC(evp_md, key, key_len, d, n, md, &md_len); + + BIO* b64 = BIO_new(BIO_f_base64()); + BIO* bmem = BIO_new(BIO_s_mem()); + b64 = BIO_push(b64, bmem); + BIO_write(b64, md, md_len); + BIO_flush(b64); + BUF_MEM *bptr; + BIO_get_mem_ptr(b64, &bptr); + + Signature.resize(bptr->length - 1); + memcpy(&Signature[0], bptr->data, bptr->length-1); + + BIO_free_all(b64); + + return Signature; +} + +// libcurl callback +static size_t +readCallback(void *data, size_t blockSize, size_t numBlocks, void *userPtr) { + string *userString = static_cast(userPtr); + size_t count = min((*userString).size(), blockSize*numBlocks); + memcpy(data, (*userString).data(), count); + (*userString).erase(0, count); + return count; +} + +// libcurl callback +static size_t +writeCallback(void* data, size_t blockSize, size_t numBlocks, void* userPtr) { + string* userString = static_cast(userPtr); + (*userString).append(reinterpret_cast(data), blockSize*numBlocks); + return blockSize*numBlocks; +} + +static int +s3fs_getattr(const char *path, struct stat *stbuf) { + memset(stbuf, 0, sizeof(struct stat)); + if (strcmp(path, "/") == 0) { + stbuf->st_nlink = 1; // see fuse faq + stbuf->st_mode = S_IFDIR | 0755; + return 0; + } + + { + auto_lock lock(stat_cache_lock); + stat_cache_t::iterator iter = stat_cache.find(path); + if (iter != stat_cache.end()) { + *stbuf = (*iter).second; + stat_cache.erase(path); + return 0; + } + } + + string host = "http://s3.amazonaws.com"; + string resource = urlEncode("/"+bucket + path); + string url = host + resource; + + auto_curl curl; + curl_easy_setopt(curl, CURLOPT_URL, url.c_str()); + curl_easy_setopt(curl, CURLOPT_FAILONERROR, true); + curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, true); + curl_easy_setopt(curl, CURLOPT_NOBODY, true); // HEAD + curl_easy_setopt(curl, CURLOPT_FILETIME, true); // Last-Modified + + auto_curl_slist headers; + string date = get_date(); + headers.append("Date: "+date); + headers.append("Authorization: AWS "+AWSAccessKeyId+":"+calc_signature("HEAD", "", date, resource)); + curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers.get()); + + if (curl_easy_perform(curl) != 0) { + long responseCode; + if (curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &responseCode) != 0) + return -EIO; + if (responseCode == 404) + return -ENOENT; + return -EIO; + } + + stbuf->st_nlink = 1; // see fuse faq + + long LastModified; + if (curl_easy_getinfo(curl, CURLINFO_FILETIME, &LastModified) == 0) + stbuf->st_mtime = LastModified; + + char* ContentType; + if (curl_easy_getinfo(curl, CURLINFO_CONTENT_TYPE, &ContentType) == 0) + stbuf->st_mode = strcmp(ContentType, "application/x-directory")== 0 ? S_IFDIR | 0755 : S_IFREG | 0755; + + double ContentLength; + if (curl_easy_getinfo(curl, CURLINFO_CONTENT_LENGTH_DOWNLOAD, &ContentLength) == 0) + stbuf->st_size = static_cast<__off_t>(ContentLength); + + if (strcmp(ContentType, "application/x-directory") != 0) + stbuf->st_blocks = stbuf->st_size / 512 + 1; + + return 0; +} + +static int +s3fs_readlink(const char *path, char *buf, size_t size) { + cout << "###readlink: path=" << path << endl; + return -ENOENT; +} + +static int +s3fs_mknod(const char *path, mode_t mode, dev_t rdev) { + cout << "mknod: path="<< path << endl; + + string host = "http://s3.amazonaws.com"; + string resource = urlEncode("/"+bucket + path); + string url = host + resource; + + auto_curl curl; + curl_easy_setopt(curl, CURLOPT_URL, url.c_str()); + curl_easy_setopt(curl, CURLOPT_FAILONERROR, true); + curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, true); + curl_easy_setopt(curl, CURLOPT_UPLOAD, true); // HTTP PUT + curl_easy_setopt(curl, CURLOPT_INFILESIZE, 0); // Content-Length: 0 + + auto_curl_slist headers; + string date = get_date(); + headers.append("Date: "+date); + headers.append("Authorization: AWS "+AWSAccessKeyId+":"+calc_signature("PUT", "application/octet-stream", date, resource)); + headers.append("Content-Type: application/octet-stream"); + curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers.get()); + + if (curl_easy_perform(curl) != 0) + return -EIO; + + return 0; +} + +static int +s3fs_mkdir(const char *path, mode_t mode) { + cout << "mkdir: path=" << path << endl; + + string host = "http://s3.amazonaws.com"; + string resource = urlEncode("/"+bucket + path); + string url = host + resource; + + auto_curl curl; + curl_easy_setopt(curl, CURLOPT_URL, url.c_str()); + curl_easy_setopt(curl, CURLOPT_FAILONERROR, true); + curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, true); + curl_easy_setopt(curl, CURLOPT_UPLOAD, true); // HTTP PUT + curl_easy_setopt(curl, CURLOPT_INFILESIZE, 0); // Content-Length: 0 + + auto_curl_slist headers; + string date = get_date(); + headers.append("Date: "+date); + headers.append("Authorization: AWS "+AWSAccessKeyId+":"+calc_signature("PUT", "application/x-directory", date, resource)); + headers.append("Content-Type: application/x-directory"); + curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers.get()); + + if (curl_easy_perform(curl) != 0) + return -EIO; + + return 0; +} + +// aka rm +static int +s3fs_unlink(const char *path) { + cout << "unlink: path=" << path << endl; + + string host = "http://s3.amazonaws.com"; + string resource = urlEncode("/"+bucket + path); + string url = host + resource; + + auto_curl curl; + curl_easy_setopt(curl, CURLOPT_URL, url.c_str()); + curl_easy_setopt(curl, CURLOPT_FAILONERROR, true); + curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, true); + curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "DELETE"); + + auto_curl_slist headers; + string date = get_date(); + headers.append("Date: "+date); + headers.append("Authorization: AWS "+AWSAccessKeyId+":"+calc_signature("DELETE", "", date, resource)); + curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers.get()); + + if (curl_easy_perform(curl) != 0) + return -EIO; + + return 0; +} + +static int +s3fs_rmdir(const char *path) { + cout << "unlink: path=" << path << endl; + + string host = "http://s3.amazonaws.com"; + string resource = urlEncode("/"+bucket + path); + string url = host + resource; + + auto_curl curl; + curl_easy_setopt(curl, CURLOPT_URL, url.c_str()); + curl_easy_setopt(curl, CURLOPT_FAILONERROR, true); + curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, true); + curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, "DELETE"); + + auto_curl_slist headers; + string date = get_date(); + headers.append("Date: "+date); + headers.append("Authorization: AWS "+AWSAccessKeyId+":"+calc_signature("DELETE", "", date, resource)); + curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers.get()); + + if (curl_easy_perform(curl) != 0) + return -EIO; + + return 0; +} + +static int +s3fs_symlink(const char *from, const char *to) { + cout << "symlink:" << " from=" << from << " to=" << to << endl; + return -EPERM; +} + +static int +s3fs_rename(const char *from, const char *to) { + cout << "rename:" << " from=" << from << " to=" << to << endl; + return -EXDEV; +} + +static int +s3fs_link(const char *from, const char *to) { + cout << "link:" << " from=" << from << " to=" << to << endl; + return -EPERM; +} + +static int +s3fs_chmod(const char *path, mode_t mode) { + cout << "###chmod: path=" << path << endl; + return 0; +} + +static int +s3fs_chown(const char *path, uid_t uid, gid_t gid) { + cout << "###chown: path=" << path << endl; + return 0; +} + +static int +s3fs_truncate(const char *path, off_t size) { + //###TODO honor size?!? + + cout << "truncate:" << " path=" << path << " size=" << size << endl; + + string host = "http://s3.amazonaws.com"; + string resource = urlEncode("/"+bucket + path); + string url = host + resource; + + auto_curl curl; + curl_easy_setopt(curl, CURLOPT_URL, url.c_str()); + curl_easy_setopt(curl, CURLOPT_FAILONERROR, true); + curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, true); + curl_easy_setopt(curl, CURLOPT_UPLOAD, true); // HTTP PUT + curl_easy_setopt(curl, CURLOPT_INFILESIZE, 0); // Content-Length: 0 + + auto_curl_slist headers; + string date = get_date(); + headers.append("Date: "+date); + headers.append("Authorization: AWS "+AWSAccessKeyId+":"+calc_signature("PUT", "application/octet-stream", date, resource)); + headers.append("Content-Type: application/octet-stream"); + curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers.get()); + + if (curl_easy_perform(curl) != 0) + return -EIO; + + return 0; +} + +static int +s3fs_open(const char *path, struct fuse_file_info *fi) { + cout << "open:" << " path="<< path << endl; + fi->fh = reinterpret_cast(new string); + return 0; +} + +static int +s3fs_read(const char *path, char *buf, size_t size, off_t offset, struct fuse_file_info *fi) { + cout << "read:"<< " path="<< path << " size="<< size << " offset="<< offset << endl; + + string responseText; + string host = "http://s3.amazonaws.com"; + string resource = urlEncode("/"+bucket + path); + string url = host + resource; + + auto_curl curl; + curl_easy_setopt(curl, CURLOPT_URL, url.c_str()); + curl_easy_setopt(curl, CURLOPT_FAILONERROR, true); + curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, true); + curl_easy_setopt(curl, CURLOPT_WRITEDATA, &responseText); + curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writeCallback); + + auto_curl_slist headers; + string date = get_date(); + headers.append("Date: "+date); + headers.append("Authorization: AWS "+AWSAccessKeyId+":"+calc_signature("GET", "", date, resource)); + curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers.get()); + + // tricky... + char range[100]; + size_t x = offset; + size_t y = offset + size - 1; + sprintf(range, "%u-%u", x, y); + curl_easy_setopt(curl, CURLOPT_RANGE, range); + + if (curl_easy_perform(curl) != 0) { + long responseCode; + if (curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &responseCode) != 0) + return -EIO; + if (responseCode == 404) + return -ENOENT; + return -EIO; + } + + size_t count = min(size, responseText.size()); + memcpy(buf, responseText.data(), count); + return count; +} + +static int +s3fs_write(const char *path, const char *buf, size_t size, off_t offset, struct fuse_file_info *fi) { + cout << "write:"<< " path="<< path << " size="<< size << " offset="<< offset << endl; + // ### TODO lock?!? + // ### TODO some sort of scheme to detect a partial write and then do a complete read and then a complete write... + size_t off = offset; + string* str = reinterpret_cast(fi->fh); + if ((*str).size() < off+size) + (*str).resize(off+size); + memcpy(&(*str)[off], buf, size); + return size; +} + +static int +s3fs_statfs(const char *path, struct statvfs *stbuf) { + // 256T + stbuf->f_bsize = 0X1000000; + stbuf->f_blocks = 0X1000000; + stbuf->f_bfree = 0x1000000; + stbuf->f_bavail = 0x1000000; + return 0; +} + +static int +s3fs_flush(const char *path, struct fuse_file_info *fi) { + cout << "flush: path=" << path << endl; + if (fi->fh != 0) { + string* requestText = reinterpret_cast(fi->fh); + if ((*requestText).size() > 0) { + string host = "http://s3.amazonaws.com"; + string resource = urlEncode("/"+bucket + path); + string url = host + resource; + + auto_curl curl; + curl_easy_setopt(curl, CURLOPT_URL, url.c_str()); + curl_easy_setopt(curl, CURLOPT_FAILONERROR, true); + curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, true); + curl_easy_setopt(curl, CURLOPT_UPLOAD, true); // HTTP PUT + curl_easy_setopt(curl, CURLOPT_INFILESIZE, (*requestText).size()); // Content-Length + curl_easy_setopt(curl, CURLOPT_READDATA, requestText); + curl_easy_setopt(curl, CURLOPT_READFUNCTION, readCallback); + + auto_curl_slist headers; + string date = get_date(); + headers.append("Date: "+date); + headers.append("Authorization: AWS "+AWSAccessKeyId+":"+calc_signature("PUT", "application/octet-stream", date, resource)); + headers.append("Content-Type: application/octet-stream"); + curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers.get()); + + if (curl_easy_perform(curl) != 0) + return -EIO; + + return 0; + } + } + return 0; +} + +static int +s3fs_release(const char *path, struct fuse_file_info *fi) { + cout << "release:" << " path=" << path << endl; + string* requestText = reinterpret_cast(fi->fh); + delete requestText; + return 0; +} + +static int +s3fs_readdir(const char *path, void *buf, fuse_fill_dir_t filler, off_t offset, struct fuse_file_info *fi) { + cout << "readdir:"<< " path="<< path << endl; + + string NextMarker; + string IsTruncated("true"); + + while (IsTruncated == "true") { + string responseText; + string resource = urlEncode("/"+bucket); // this is what gets signed + string query = "delimiter=/&prefix="; + + if (strcmp(path, "/") != 0) + query += urlEncode(string(path).substr(1) + "/"); + + if (NextMarker.size() > 0) + query += "&marker=" + urlEncode(NextMarker); + + string url = host + resource + "?"+ query; + + auto_curl curl; + curl_easy_setopt(curl, CURLOPT_URL, url.c_str()); + curl_easy_setopt(curl, CURLOPT_FAILONERROR, true); + curl_easy_setopt(curl, CURLOPT_FOLLOWLOCATION, true); + curl_easy_setopt(curl, CURLOPT_WRITEDATA, &responseText); + curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, writeCallback); + + auto_curl_slist headers; + string date = get_date(); + headers.append("Date: "+date); + headers.append("Authorization: AWS "+AWSAccessKeyId+":"+calc_signature("GET", "", date, resource)); + + curl_easy_setopt(curl, CURLOPT_HTTPHEADER, headers.get()); + + if (curl_easy_perform(curl) != 0) { + long responseCode; + if (curl_easy_getinfo(curl, CURLINFO_RESPONSE_CODE, &responseCode) != 0) + return -EIO; + // ### TODO need to differentiate between no such bucket a little bit better here... + // need to parse response document and return -EIO if NoSuchBucket + if (responseCode == 404) { + if (strcmp(path, "/") == 0) + return -EIO; + return -ENOENT; + } + return -EIO; + } + + { + xmlDocPtr doc = xmlReadMemory(responseText.c_str(), responseText.size(), "", NULL, 0); + if (doc != NULL&& doc->children != NULL) { + for (xmlNodePtr cur_node = doc->children->children; cur_node != NULL; cur_node = cur_node->next) { + string cur_node_name(reinterpret_cast(cur_node->name)); + if (cur_node_name == "IsTruncated") + IsTruncated = reinterpret_cast(cur_node->children->content); + if (cur_node_name == "NextMarker") + NextMarker = reinterpret_cast(cur_node->children->content); + if (cur_node_name == "Contents") { + if (cur_node->children != NULL) { + string Key; + string LastModified; + string Size; + for (xmlNodePtr sub_node = cur_node->children; sub_node != NULL; sub_node = sub_node->next) { + if (sub_node->type == XML_ELEMENT_NODE) { + string elementName = reinterpret_cast(sub_node->name); + if (sub_node->children != NULL) { + if (sub_node->children->type == XML_TEXT_NODE) { + if (elementName == "Key") + Key = reinterpret_cast(sub_node->children->content); + if (elementName == "LastModified") + LastModified = reinterpret_cast(sub_node->children->content); + if (elementName == "Size") + Size = reinterpret_cast(sub_node->children->content); + } + } + } + } + if (Key.size() > 0) { + struct stat st; + memset(&st, 0, sizeof(st)); + st.st_nlink = 1; // see fuse faq + // mode + st.st_mode = S_IFREG | 0755; + // size + stringstream tmp(Size); + tmp >> st.st_size; + // modified... something like "2005-12-31T23:59:59Z" + struct tm gmt; + strptime(LastModified.c_str(), "%Y-%m-%dT%H:%M:%SZ", &gmt); + st.st_mtime = timegm(&gmt); + // blocks + st.st_blocks = st.st_size / 512 + 1; + // if size is 0 then we don't know whether its a file or a directory... + // defer to getattr() to determine whether its a file or a directory from Content-Type + if (st.st_size > 0) { + auto_lock lock(stat_cache_lock); + stat_cache["/"+Key] = st; + } + if (filler(buf, basename((char*)Key.c_str()), 0, 0)) + break; + } + } + } + } + } + xmlFreeDoc(doc); + } + } + + return 0; +} + +static void* +s3fs_init(struct fuse_conn_info *conn) { + printf("init\n"); + pthread_mutex_init(&stat_cache_lock, NULL); + pthread_mutex_init(&curl_handles_lock, NULL); + return 0; +} + +static void +s3fs_destroy(void*) { + printf("destroy\n"); + pthread_mutex_destroy(&stat_cache_lock); + pthread_mutex_destroy(&curl_handles_lock); +} + +static int +s3fs_access(const char *path, int mask) { + cout << "###access:" << " path=" << path << endl; + return 0; +} + +// aka touch +static int +s3fs_utimens(const char *path, const struct timespec ts[2]) { + cout << "###utimens: path=" << path << endl; + return -EPERM; +} + +static int +my_fuse_opt_proc(void *data, const char *arg, int key, struct fuse_args *outargs) { + if (key == FUSE_OPT_KEY_NONOPT) { + if (bucket.size() == 0) { + bucket = arg; + return 0; + } + } + if (key == FUSE_OPT_KEY_OPT) { + if (strstr(arg, "accessKeyId=") != 0) { + AWSAccessKeyId = strchr(arg, '=') + 1; + return 0; + } + if (strstr(arg, "secretAccessKey=") != 0) { + AWSSecretAccessKey = strchr(arg, '=') + 1; + return 0; + } + } + return 1; +} + +static struct fuse_operations s3fs_oper; + +int +main(int argc, char *argv[]) { + memset(&s3fs_oper, sizeof(s3fs_oper), 0); + + struct fuse_args custom_args = FUSE_ARGS_INIT(argc, argv); + fuse_opt_parse(&custom_args, NULL, NULL, my_fuse_opt_proc); + + if (bucket.size() == 0) { + cout << argv[0] << ": " << "missing bucket" << endl; + exit(1); + } + + if (AWSSecretAccessKey.size() == 0) { + string line; + ifstream passwd("/etc/passwd-s3fs"); + while (getline(passwd, line)) { + if (line[0]=='#') + continue; + size_t pos = line.find(':'); + if (pos != string::npos) { + // is accessKeyId missing? + if (AWSAccessKeyId.size() == 0) + AWSAccessKeyId = line.substr(0, pos); + // is secretAccessKey missing? + if (AWSSecretAccessKey.size() == 0) { + if (line.substr(0, pos) == AWSAccessKeyId) + AWSSecretAccessKey = line.substr(pos + 1, string::npos); + } + } + } + } + + if (AWSAccessKeyId.size() == 0) { + cout << argv[0] << ": " << "missing accessKeyId.. see /etc/passwd-s3fs or use, e.g., -o accessKeyId=10QO29WI38EU47RY56T" << endl; + exit(1); + } + if (AWSSecretAccessKey.size() == 0) { + cout << argv[0] << ": " << "missing secretAccessKey... see /etc/passwd-s3fs" << endl; + exit(1); + } + + s3fs_oper.getattr = s3fs_getattr; + s3fs_oper.readlink = s3fs_readlink; + s3fs_oper.mknod = s3fs_mknod; + s3fs_oper.mkdir = s3fs_mkdir; + s3fs_oper.unlink = s3fs_unlink; + s3fs_oper.rmdir = s3fs_rmdir; + s3fs_oper.symlink = s3fs_symlink; + s3fs_oper.rename = s3fs_rename; + s3fs_oper.link = s3fs_link; + s3fs_oper.chmod = s3fs_chmod; + s3fs_oper.chown = s3fs_chown; + s3fs_oper.truncate = s3fs_truncate; + s3fs_oper.open = s3fs_open; + s3fs_oper.read = s3fs_read; + s3fs_oper.write = s3fs_write; + s3fs_oper.statfs = s3fs_statfs; + s3fs_oper.flush = s3fs_flush; + s3fs_oper.release = s3fs_release; + s3fs_oper.readdir = s3fs_readdir; + s3fs_oper.init = s3fs_init; + s3fs_oper.destroy = s3fs_destroy; + s3fs_oper.access = s3fs_access; + s3fs_oper.utimens = s3fs_utimens; + + return fuse_main(custom_args.argc, custom_args.argv, &s3fs_oper, NULL); +}