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Diffstat (limited to 'test/interactive-helper/aptwebserver.cc')
| -rw-r--r-- | test/interactive-helper/aptwebserver.cc | 513 |
1 files changed, 513 insertions, 0 deletions
diff --git a/test/interactive-helper/aptwebserver.cc b/test/interactive-helper/aptwebserver.cc new file mode 100644 index 000000000..ff60d64a3 --- /dev/null +++ b/test/interactive-helper/aptwebserver.cc @@ -0,0 +1,513 @@ +#include <config.h> + +#include <apt-pkg/strutl.h> +#include <apt-pkg/fileutl.h> +#include <apt-pkg/error.h> +#include <apt-pkg/cmndline.h> +#include <apt-pkg/configuration.h> +#include <apt-pkg/init.h> + +#include <vector> +#include <string> +#include <list> +#include <sstream> + +#include <sys/socket.h> +#include <sys/types.h> +#include <sys/stat.h> +#include <netinet/in.h> +#include <unistd.h> +#include <errno.h> +#include <time.h> +#include <stdlib.h> +#include <dirent.h> +#include <signal.h> + +char const * const httpcodeToStr(int const httpcode) { /*{{{*/ + switch (httpcode) { + // Informational 1xx + case 100: return "100 Continue"; + case 101: return "101 Switching Protocols"; + // Successful 2xx + case 200: return "200 OK"; + case 201: return "201 Created"; + case 202: return "202 Accepted"; + case 203: return "203 Non-Authoritative Information"; + case 204: return "204 No Content"; + case 205: return "205 Reset Content"; + case 206: return "206 Partial Content"; + // Redirections 3xx + case 300: return "300 Multiple Choices"; + case 301: return "301 Moved Permanently"; + case 302: return "302 Found"; + case 303: return "303 See Other"; + case 304: return "304 Not Modified"; + case 305: return "304 Use Proxy"; + case 307: return "307 Temporary Redirect"; + // Client errors 4xx + case 400: return "400 Bad Request"; + case 401: return "401 Unauthorized"; + case 402: return "402 Payment Required"; + case 403: return "403 Forbidden"; + case 404: return "404 Not Found"; + case 405: return "405 Method Not Allowed"; + case 406: return "406 Not Acceptable"; + case 407: return "407 Proxy Authentication Required"; + case 408: return "408 Request Time-out"; + case 409: return "409 Conflict"; + case 410: return "410 Gone"; + case 411: return "411 Length Required"; + case 412: return "412 Precondition Failed"; + case 413: return "413 Request Entity Too Large"; + case 414: return "414 Request-URI Too Large"; + case 415: return "415 Unsupported Media Type"; + case 416: return "416 Requested range not satisfiable"; + case 417: return "417 Expectation Failed"; + // Server error 5xx + case 500: return "500 Internal Server Error"; + case 501: return "501 Not Implemented"; + case 502: return "502 Bad Gateway"; + case 503: return "503 Service Unavailable"; + case 504: return "504 Gateway Time-out"; + case 505: return "505 HTTP Version not supported"; + } + return NULL; +} + /*}}}*/ +void addFileHeaders(std::list<std::string> &headers, FileFd &data) { /*{{{*/ + std::ostringstream contentlength; + contentlength << "Content-Length: " << data.FileSize(); + headers.push_back(contentlength.str()); + + std::string lastmodified("Last-Modified: "); + lastmodified.append(TimeRFC1123(data.ModificationTime())); + headers.push_back(lastmodified); + + std::string const fileext = flExtension(data.Name()); + if (fileext.empty() == false && fileext != data.Name()) { + std::string confcontenttype("aptwebserver::ContentType::"); + confcontenttype.append(fileext); + std::string const contenttype = _config->Find(confcontenttype); + if (contenttype.empty() == false) { + std::string header("Content-Type: "); + header.append(contenttype); + headers.push_back(header); + } + } +} + /*}}}*/ +void addDataHeaders(std::list<std::string> &headers, std::string &data) {/*{{{*/ + std::ostringstream contentlength; + contentlength << "Content-Length: " << data.size(); + headers.push_back(contentlength.str()); +} + /*}}}*/ +bool sendHead(int const client, int const httpcode, std::list<std::string> &headers) { /*{{{*/ + std::string response("HTTP/1.1 "); + response.append(httpcodeToStr(httpcode)); + headers.push_front(response); + + headers.push_back("Server: APT webserver"); + + std::string date("Date: "); + date.append(TimeRFC1123(time(NULL))); + headers.push_back(date); + + headers.push_back("Accept-Ranges: bytes"); + + std::clog << ">>> RESPONSE >>>" << std::endl; + bool Success = true; + for (std::list<std::string>::const_iterator h = headers.begin(); + Success == true && h != headers.end(); ++h) { + Success &= FileFd::Write(client, h->c_str(), h->size()); + if (Success == true) + Success &= FileFd::Write(client, "\r\n", 2); + std::clog << *h << std::endl; + } + if (Success == true) + Success &= FileFd::Write(client, "\r\n", 2); + std::clog << "<<<<<<<<<<<<<<<<" << std::endl; + return Success; +} + /*}}}*/ +bool sendFile(int const client, FileFd &data) { /*{{{*/ + bool Success = true; + char buffer[500]; + unsigned long long actual = 0; + while ((Success &= data.Read(buffer, sizeof(buffer), &actual)) == true) { + if (actual == 0) + break; + if (Success == true) + Success &= FileFd::Write(client, buffer, actual); + } + if (Success == true) + Success &= FileFd::Write(client, "\r\n", 2); + return Success; +} + /*}}}*/ +bool sendData(int const client, std::string const &data) { /*{{{*/ + bool Success = true; + Success &= FileFd::Write(client, data.c_str(), data.size()); + if (Success == true) + Success &= FileFd::Write(client, "\r\n", 2); + return Success; +} + /*}}}*/ +void sendError(int const client, int const httpcode, std::string const &request, bool content, std::string const &error = "") { /*{{{*/ + std::list<std::string> headers; + std::string response("<html><head><title>"); + response.append(httpcodeToStr(httpcode)).append("</title></head>"); + response.append("<body><h1>").append(httpcodeToStr(httpcode)).append("</h1>"); + if (error.empty() == false) + response.append("<p><em>Error</em>: ").append(error).append("</p>"); + response.append("This error is a result of the request: <pre>"); + response.append(request).append("</pre></body></html>"); + addDataHeaders(headers, response); + sendHead(client, httpcode, headers); + if (content == true) + sendData(client, response); +} + /*}}}*/ +void sendRedirect(int const client, int const httpcode, std::string const &uri, std::string const &request, bool content) { /*{{{*/ + std::list<std::string> headers; + std::string response("<html><head><title>"); + response.append(httpcodeToStr(httpcode)).append("</title></head>"); + response.append("<body><h1>").append(httpcodeToStr(httpcode)).append("</h1"); + response.append("<p>You should be redirected to <em>").append(uri).append("</em></p>"); + response.append("This page is a result of the request: <pre>"); + response.append(request).append("</pre></body></html>"); + addDataHeaders(headers, response); + std::string location("Location: "); + if (strncmp(uri.c_str(), "http://", 7) != 0) + location.append("http://").append(LookupTag(request, "Host")).append("/").append(uri); + else + location.append(uri); + headers.push_back(location); + sendHead(client, httpcode, headers); + if (content == true) + sendData(client, response); +} + /*}}}*/ +// sendDirectoryLisiting /*{{{*/ +int filter_hidden_files(const struct dirent *a) { + if (a->d_name[0] == '.') + return 0; +#ifdef _DIRENT_HAVE_D_TYPE + // if we have the d_type check that only files and dirs will be included + if (a->d_type != DT_UNKNOWN && + a->d_type != DT_REG && + a->d_type != DT_LNK && // this includes links to regular files + a->d_type != DT_DIR) + return 0; +#endif + return 1; +} +int grouped_alpha_case_sort(const struct dirent **a, const struct dirent **b) { +#ifdef _DIRENT_HAVE_D_TYPE + if ((*a)->d_type == DT_DIR && (*b)->d_type == DT_DIR); + else if ((*a)->d_type == DT_DIR && (*b)->d_type == DT_REG) + return -1; + else if ((*b)->d_type == DT_DIR && (*a)->d_type == DT_REG) + return 1; + else +#endif + { + struct stat f_prop; //File's property + stat((*a)->d_name, &f_prop); + int const amode = f_prop.st_mode; + stat((*b)->d_name, &f_prop); + int const bmode = f_prop.st_mode; + if (S_ISDIR(amode) && S_ISDIR(bmode)); + else if (S_ISDIR(amode)) + return -1; + else if (S_ISDIR(bmode)) + return 1; + } + return strcasecmp((*a)->d_name, (*b)->d_name); +} +void sendDirectoryListing(int const client, std::string const &dir, std::string const &request, bool content) { + std::list<std::string> headers; + std::ostringstream listing; + + struct dirent **namelist; + int const counter = scandir(dir.c_str(), &namelist, filter_hidden_files, grouped_alpha_case_sort); + if (counter == -1) { + sendError(client, 500, request, content); + return; + } + + listing << "<html><head><title>Index of " << dir << "</title>" + << "<style type=\"text/css\"><!-- td {padding: 0.02em 0.5em 0.02em 0.5em;}" + << "tr:nth-child(even){background-color:#dfdfdf;}" + << "h1, td:nth-child(3){text-align:center;}" + << "table {margin-left:auto;margin-right:auto;} --></style>" + << "</head>" << std::endl + << "<body><h1>Index of " << dir << "</h1>" << std::endl + << "<table><tr><th>#</th><th>Name</th><th>Size</th><th>Last-Modified</th></tr>" << std::endl; + if (dir != ".") + listing << "<tr><td>d</td><td><a href=\"..\">Parent Directory</a></td><td>-</td><td>-</td></tr>"; + for (int i = 0; i < counter; ++i) { + struct stat fs; + std::string filename(dir); + filename.append("/").append(namelist[i]->d_name); + stat(filename.c_str(), &fs); + if (S_ISDIR(fs.st_mode)) { + listing << "<tr><td>d</td>" + << "<td><a href=\"" << namelist[i]->d_name << "/\">" << namelist[i]->d_name << "</a></td>" + << "<td>-</td>"; + } else { + listing << "<tr><td>f</td>" + << "<td><a href=\"" << namelist[i]->d_name << "\">" << namelist[i]->d_name << "</a></td>" + << "<td>" << SizeToStr(fs.st_size) << "B</td>"; + } + listing << "<td>" << TimeRFC1123(fs.st_mtime) << "</td></tr>" << std::endl; + } + listing << "</table></body></html>" << std::endl; + + std::string response(listing.str()); + addDataHeaders(headers, response); + sendHead(client, 200, headers); + if (content == true) + sendData(client, response); +} + /*}}}*/ +bool parseFirstLine(int const client, std::string const &request, std::string &filename, bool &sendContent, bool &closeConnection) { /*{{{*/ + if (strncmp(request.c_str(), "HEAD ", 5) == 0) + sendContent = false; + if (strncmp(request.c_str(), "GET ", 4) != 0) + { + sendError(client, 501, request, true); + return false; + } + + size_t const lineend = request.find('\n'); + size_t filestart = request.find(' '); + for (; request[filestart] == ' '; ++filestart); + size_t fileend = request.rfind(' ', lineend); + if (lineend == std::string::npos || filestart == std::string::npos || + fileend == std::string::npos || filestart == fileend) { + sendError(client, 500, request, sendContent, "Filename can't be extracted"); + return false; + } + + size_t httpstart = fileend; + for (; request[httpstart] == ' '; ++httpstart); + if (strncmp(request.c_str() + httpstart, "HTTP/1.1\r", 9) == 0) + closeConnection = strcasecmp(LookupTag(request, "Connection", "Keep-Alive").c_str(), "Keep-Alive") != 0; + else if (strncmp(request.c_str() + httpstart, "HTTP/1.0\r", 9) == 0) + closeConnection = strcasecmp(LookupTag(request, "Connection", "Keep-Alive").c_str(), "close") == 0; + else { + sendError(client, 500, request, sendContent, "Not an HTTP/1.{0,1} request"); + return false; + } + + filename = request.substr(filestart, fileend - filestart); + if (filename.find(' ') != std::string::npos) { + sendError(client, 500, request, sendContent, "Filename contains an unencoded space"); + return false; + } + filename = DeQuoteString(filename); + + // this is not a secure server, but at least prevent the obvious … + if (filename.empty() == true || filename[0] != '/' || + strncmp(filename.c_str(), "//", 2) == 0 || + filename.find_first_of("\r\n\t\f\v") != std::string::npos || + filename.find("/../") != std::string::npos) { + sendError(client, 400, request, sendContent, "Filename contains illegal character (sequence)"); + return false; + } + + // nuke the first character which is a / as we assured above + filename.erase(0, 1); + if (filename.empty() == true) + filename = "."; + return true; +} + /*}}}*/ +int main(int const argc, const char * argv[]) +{ + CommandLine::Args Args[] = { + {0, "simulate-paywall", "aptwebserver::Simulate-Paywall", + CommandLine::Boolean}, + {0, "port", "aptwebserver::port", CommandLine::HasArg}, + {'c',"config-file",0,CommandLine::ConfigFile}, + {'o',"option",0,CommandLine::ArbItem}, + {0,0,0,0} + }; + + CommandLine CmdL(Args, _config); + if(CmdL.Parse(argc,argv) == false) { + _error->DumpErrors(); + exit(1); + } + + // create socket, bind and listen to it {{{ + // ignore SIGPIPE, this can happen on write() if the socket closes connection + signal(SIGPIPE, SIG_IGN); + int sock = socket(AF_INET6, SOCK_STREAM, 0); + if(sock < 0 ) { + _error->Errno("aptwerbserver", "Couldn't create socket"); + _error->DumpErrors(std::cerr); + return 1; + } + + // get the port + int const port = _config->FindI("aptwebserver::port", 8080); + bool const simulate_broken_server = _config->FindB("aptwebserver::Simulate-Paywall", false); + + // ensure that we accept all connections: v4 or v6 + int const iponly = 0; + setsockopt(sock, IPPROTO_IPV6, IPV6_V6ONLY, &iponly, sizeof(iponly)); + // to not linger to an address + int const enable = 1; + setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &enable, sizeof(enable)); + + struct sockaddr_in6 locAddr; + memset(&locAddr, 0, sizeof(locAddr)); + locAddr.sin6_family = AF_INET6; + locAddr.sin6_port = htons(port); + locAddr.sin6_addr = in6addr_any; + + if (bind(sock, (struct sockaddr*) &locAddr, sizeof(locAddr)) < 0) { + _error->Errno("aptwerbserver", "Couldn't bind"); + _error->DumpErrors(std::cerr); + return 2; + } + + if (simulate_broken_server) { + std::clog << "Simulating a broken web server that return nonsense " + "for all querries" << std::endl; + } else { + std::clog << "Serving ANY file on port: " << port << std::endl; + } + + listen(sock, 1); + /*}}}*/ + + std::vector<std::string> messages; + int client; + while ((client = accept(sock, NULL, NULL)) != -1) { + std::clog << "ACCEPT client " << client + << " on socket " << sock << std::endl; + + while (ReadMessages(client, messages)) { + bool closeConnection = false; + for (std::vector<std::string>::const_iterator m = messages.begin(); + m != messages.end() && closeConnection == false; ++m) { + std::clog << ">>> REQUEST >>>>" << std::endl << *m + << std::endl << "<<<<<<<<<<<<<<<<" << std::endl; + std::list<std::string> headers; + std::string filename; + bool sendContent = true; + if (parseFirstLine(client, *m, filename, sendContent, closeConnection) == false) + continue; + + std::string host = LookupTag(*m, "Host", ""); + if (host.empty() == true) { + // RFC 2616 §14.23 requires Host + sendError(client, 400, *m, sendContent, "Host header is required"); + continue; + } + + if (simulate_broken_server == true) { + std::string data("ni ni ni\n"); + addDataHeaders(headers, data); + sendHead(client, 200, headers); + sendData(client, data); + } + else if (RealFileExists(filename) == true) { + FileFd data(filename, FileFd::ReadOnly); + std::string condition = LookupTag(*m, "If-Modified-Since", ""); + if (condition.empty() == false) { + time_t cache; + if (RFC1123StrToTime(condition.c_str(), cache) == true && + cache >= data.ModificationTime()) { + sendHead(client, 304, headers); + continue; + } + } + condition = LookupTag(*m, "If-Range", ""); + bool ignoreRange = false; + if (condition.empty() == false) { + time_t cache; + if (RFC1123StrToTime(condition.c_str(), cache) == false || + cache < data.ModificationTime()) + ignoreRange = true; + } + condition = LookupTag(*m, "Range", ""); + if (ignoreRange == false && condition.empty() == false && + strncmp(condition.c_str(), "bytes=", 6) == 0) { + size_t end = condition.find(','); + // FIXME: support multiple byte-ranges + if (end == std::string::npos) { + size_t start = 6; + unsigned long long filestart = strtoull(condition.c_str() + start, NULL, 10); + // FIXME: no fileend support + size_t dash = condition.find('-') + 1; + unsigned long long fileend = strtoull(condition.c_str() + dash, NULL, 10); + unsigned long long filesize = data.FileSize(); + if (fileend == 0 || fileend == filesize) { + if (filesize > filestart) { + data.Skip(filestart); + std::ostringstream contentlength; + contentlength << "Content-Length: " << (filesize - filestart); + headers.push_back(contentlength.str()); + std::ostringstream contentrange; + contentrange << "Content-Range: bytes " << filestart << "-" + << filesize - 1 << "/" << filesize; + headers.push_back(contentrange.str()); + sendHead(client, 206, headers); + if (sendContent == true) + sendFile(client, data); + continue; + } else { + headers.push_back("Content-Length: 0"); + std::ostringstream contentrange; + contentrange << "Content-Range: bytes 0-0/" << filesize; + headers.push_back(contentrange.str()); + sendHead(client, 416, headers); + continue; + } + } + } + } + + addFileHeaders(headers, data); + sendHead(client, 200, headers); + if (sendContent == true) + sendFile(client, data); + } + else if (DirectoryExists(filename) == true) { + if (filename == "." || filename[filename.length()-1] == '/') + sendDirectoryListing(client, filename, *m, sendContent); + else + sendRedirect(client, 301, filename.append("/"), *m, sendContent); + } + else + { + ::Configuration::Item const *Replaces = _config->Tree("aptwebserver::redirect::replace"); + if (Replaces != NULL) { + std::string redirect = "/" + filename; + for (::Configuration::Item *I = Replaces->Child; I != NULL; I = I->Next) + redirect = SubstVar(redirect, I->Tag, I->Value); + redirect.erase(0,1); + if (redirect != filename) { + sendRedirect(client, 301, redirect, *m, sendContent); + continue; + } + } + sendError(client, 404, *m, sendContent); + } + } + _error->DumpErrors(std::cerr); + messages.clear(); + if (closeConnection == true) + break; + } + + std::clog << "CLOSE client " << client + << " on socket " << sock << std::endl; + close(client); + } + return 0; +} |