diff options
Diffstat (limited to 'test/interactive-helper/aptwebserver.cc')
| -rw-r--r-- | test/interactive-helper/aptwebserver.cc | 543 |
1 files changed, 543 insertions, 0 deletions
diff --git a/test/interactive-helper/aptwebserver.cc b/test/interactive-helper/aptwebserver.cc new file mode 100644 index 000000000..a8d191d0e --- /dev/null +++ b/test/interactive-helper/aptwebserver.cc @@ -0,0 +1,543 @@ +#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"; + case 418: return "418 I'm a teapot"; + // 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); +} + /*}}}*/ +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); + + 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); +} + /*}}}*/ +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 a 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, "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; + } + + int const port = _config->FindI("aptwebserver::port", 8080); + + // 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 on 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; + } + + FileFd pidfile; + if (_config->FindB("aptwebserver::fork", false) == true) + { + std::string const pidfilename = _config->Find("aptwebserver::pidfile", "aptwebserver.pid"); + int const pidfilefd = GetLock(pidfilename); + if (pidfilefd < 0 || pidfile.OpenDescriptor(pidfilefd, FileFd::WriteOnly) == false) + { + _error->Errno("aptwebserver", "Couldn't acquire lock on pidfile '%s'", pidfilename.c_str()); + _error->DumpErrors(std::cerr); + return 3; + } + + pid_t child = fork(); + if (child < 0) + { + _error->Errno("aptwebserver", "Forking failed"); + _error->DumpErrors(std::cerr); + return 4; + } + else if (child != 0) + { + // successfully forked: ready to serve! + std::string pidcontent; + strprintf(pidcontent, "%d", child); + pidfile.Write(pidcontent.c_str(), pidcontent.size()); + if (_error->PendingError() == true) + { + _error->DumpErrors(std::cerr); + return 5; + } + std::cout << "Successfully forked as " << child << std::endl; + return 0; + } + } + + 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; + } + + // string replacements in the requested filename + ::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; + } + } + + ::Configuration::Item const *Overwrite = _config->Tree("aptwebserver::overwrite"); + if (Overwrite != NULL) + { + for (::Configuration::Item *I = Overwrite->Child; I != NULL; I = I->Next) + { + regex_t *pattern = new regex_t; + int const res = regcomp(pattern, I->Tag.c_str(), REG_EXTENDED | REG_ICASE | REG_NOSUB); + if (res != 0) + { + char error[300]; + regerror(res, pattern, error, sizeof(error)); + sendError(client, 500, *m, sendContent, error); + continue; + } + if (regexec(pattern, filename.c_str(), 0, 0, 0) == 0) + { + filename = _config->Find("aptwebserver::overwrite::" + I->Tag + "::filename", filename); + if (filename[0] == '/') + filename.erase(0,1); + regfree(pattern); + break; + } + regfree(pattern); + } + } + + // deal with the request + 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; + } + } + + 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 + 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); + } + pidfile.Close(); + + return 0; +} |