X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/3ce22d4f714414d6deb8b044c5b08a8fe7a78967..2c30cf43f1c4ab96f3eca849d7eb4923ffed40b1:/test/interactive-helper/aptwebserver.cc?ds=sidebyside diff --git a/test/interactive-helper/aptwebserver.cc b/test/interactive-helper/aptwebserver.cc index 8fbb9eab9..950a17bc1 100644 --- a/test/interactive-helper/aptwebserver.cc +++ b/test/interactive-helper/aptwebserver.cc @@ -1,180 +1,853 @@ -#include <apt-pkg/strutl.h> -#include <apt-pkg/fileutl.h> -#include <apt-pkg/error.h> +#include <config.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 <apt-pkg/error.h> +#include <apt-pkg/fileutl.h> +#include <apt-pkg/strutl.h> -#include <sys/socket.h> -#include <sys/types.h> -#include <netinet/in.h> -#include <unistd.h> +#include <dirent.h> #include <errno.h> -#include <time.h> +#include <netinet/in.h> +#include <pthread.h> +#include <regex.h> +#include <signal.h> +#include <stddef.h> #include <stdlib.h> +#include <string.h> +#include <sys/socket.h> +#include <sys/stat.h> +#include <time.h> +#include <unistd.h> + +#include <algorithm> +#include <iostream> +#include <sstream> +#include <list> +#include <string> +#include <vector> -char const * const httpcodeToStr(int httpcode) { /*{{{*/ - switch (httpcode) { +static std::string httpcodeToStr(int const httpcode) /*{{{*/ +{ + switch (httpcode) + { // Informational 1xx - case 100: return "100 Continue"; - case 101: return "101 Switching Protocols"; + case 100: return _config->Find("aptwebserver::httpcode::100", "100 Continue"); + case 101: return _config->Find("aptwebserver::httpcode::101", "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 Conent"; + case 200: return _config->Find("aptwebserver::httpcode::200", "200 OK"); + case 201: return _config->Find("aptwebserver::httpcode::201", "201 Created"); + case 202: return _config->Find("aptwebserver::httpcode::202", "202 Accepted"); + case 203: return _config->Find("aptwebserver::httpcode::203", "203 Non-Authoritative Information"); + case 204: return _config->Find("aptwebserver::httpcode::204", "204 No Content"); + case 205: return _config->Find("aptwebserver::httpcode::205", "205 Reset Content"); + case 206: return _config->Find("aptwebserver::httpcode::206", "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"; + case 300: return _config->Find("aptwebserver::httpcode::300", "300 Multiple Choices"); + case 301: return _config->Find("aptwebserver::httpcode::301", "301 Moved Permanently"); + case 302: return _config->Find("aptwebserver::httpcode::302", "302 Found"); + case 303: return _config->Find("aptwebserver::httpcode::303", "303 See Other"); + case 304: return _config->Find("aptwebserver::httpcode::304", "304 Not Modified"); + case 305: return _config->Find("aptwebserver::httpcode::305", "305 Use Proxy"); + case 307: return _config->Find("aptwebserver::httpcode::307", "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 "Proxy Authentication Required"; - case 408: return "Request Time-out"; - case 409: return "Conflict"; - case 410: return "Gone"; - case 411: return "Length Required"; - case 412: return "Precondition Failed"; - case 413: return "Request Entity Too Large"; - case 414: return "Request-URI Too Large"; - case 415: return "Unsupported Media Type"; - case 416: return "Requested range not satisfiable"; - case 417: return "Expectation Failed"; + case 400: return _config->Find("aptwebserver::httpcode::400", "400 Bad Request"); + case 401: return _config->Find("aptwebserver::httpcode::401", "401 Unauthorized"); + case 402: return _config->Find("aptwebserver::httpcode::402", "402 Payment Required"); + case 403: return _config->Find("aptwebserver::httpcode::403", "403 Forbidden"); + case 404: return _config->Find("aptwebserver::httpcode::404", "404 Not Found"); + case 405: return _config->Find("aptwebserver::httpcode::405", "405 Method Not Allowed"); + case 406: return _config->Find("aptwebserver::httpcode::406", "406 Not Acceptable"); + case 407: return _config->Find("aptwebserver::httpcode::407", "407 Proxy Authentication Required"); + case 408: return _config->Find("aptwebserver::httpcode::408", "408 Request Time-out"); + case 409: return _config->Find("aptwebserver::httpcode::409", "409 Conflict"); + case 410: return _config->Find("aptwebserver::httpcode::410", "410 Gone"); + case 411: return _config->Find("aptwebserver::httpcode::411", "411 Length Required"); + case 412: return _config->Find("aptwebserver::httpcode::412", "412 Precondition Failed"); + case 413: return _config->Find("aptwebserver::httpcode::413", "413 Request Entity Too Large"); + case 414: return _config->Find("aptwebserver::httpcode::414", "414 Request-URI Too Large"); + case 415: return _config->Find("aptwebserver::httpcode::415", "415 Unsupported Media Type"); + case 416: return _config->Find("aptwebserver::httpcode::416", "416 Requested range not satisfiable"); + case 417: return _config->Find("aptwebserver::httpcode::417", "417 Expectation Failed"); + case 418: return _config->Find("aptwebserver::httpcode::418", "418 I'm a teapot"); // Server error 5xx - case 500: return "Internal Server Error"; - case 501: return "Not Implemented"; - case 502: return "Bad Gateway"; - case 503: return "Service Unavailable"; - case 504: return "Gateway Time-out"; - case 505: return "HTTP Version not supported"; + case 500: return _config->Find("aptwebserver::httpcode::500", "500 Internal Server Error"); + case 501: return _config->Find("aptwebserver::httpcode::501", "501 Not Implemented"); + case 502: return _config->Find("aptwebserver::httpcode::502", "502 Bad Gateway"); + case 503: return _config->Find("aptwebserver::httpcode::503", "503 Service Unavailable"); + case 504: return _config->Find("aptwebserver::httpcode::504", "504 Gateway Time-out"); + case 505: return _config->Find("aptwebserver::httpcode::505", "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 client, int httpcode, std::list<std::string> &headers) { /*{{{*/ - string response("HTTP/1.1 "); + return ""; +} + /*}}}*/ +static bool chunkedTransferEncoding(std::list<std::string> const &headers) { + if (std::find(headers.begin(), headers.end(), "Transfer-Encoding: chunked") != headers.end()) + return true; + if (_config->FindB("aptwebserver::chunked-transfer-encoding", false) == true) + return true; + return false; +} +static void addFileHeaders(std::list<std::string> &headers, FileFd &data)/*{{{*/ +{ + if (chunkedTransferEncoding(headers) == false) + { + std::ostringstream contentlength; + contentlength << "Content-Length: " << data.FileSize(); + headers.push_back(contentlength.str()); + } + if (_config->FindB("aptwebserver::support::last-modified", true) == true) + { + std::string lastmodified("Last-Modified: "); + lastmodified.append(TimeRFC1123(data.ModificationTime(), false)); + headers.push_back(lastmodified); + } +} + /*}}}*/ +static void addDataHeaders(std::list<std::string> &headers, std::string &data)/*{{{*/ +{ + if (chunkedTransferEncoding(headers) == false) + { + std::ostringstream contentlength; + contentlength << "Content-Length: " << data.size(); + headers.push_back(contentlength.str()); + } +} + /*}}}*/ +static 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); + _config->Set("APTWebserver::Last-Status-Code", httpcode); - headers.push_back("Server: APT webserver"); + std::stringstream buffer; + auto const empties = _config->FindVector("aptwebserver::empty-response-header"); + for (auto && e: empties) + buffer << e << ":" << std::endl; + _config->Dump(buffer, "aptwebserver::response-header", "%t: %v%n", false); + std::vector<std::string> addheaders = VectorizeString(buffer.str(), '\n'); + for (std::vector<std::string>::const_iterator h = addheaders.begin(); h != addheaders.end(); ++h) + headers.push_back(*h); std::string date("Date: "); - date.append(TimeRFC1123(time(NULL))); + date.append(TimeRFC1123(time(NULL), false)); headers.push_back(date); - std::clog << ">>> RESPONSE >>>" << std::endl; + if (chunkedTransferEncoding(headers) == true) + headers.push_back("Transfer-Encoding: chunked"); + + std::clog << ">>> RESPONSE to " << client << " >>>" << std::endl; bool Success = true; for (std::list<std::string>::const_iterator h = headers.begin(); - Success == true && h != headers.end(); ++h) { + Success == true && h != headers.end(); ++h) + { Success &= FileFd::Write(client, h->c_str(), h->size()); - Success &= FileFd::Write(client, "\r\n", 2); + if (Success == true) + Success &= FileFd::Write(client, "\r\n", 2); std::clog << *h << std::endl; } - Success &= FileFd::Write(client, "\r\n", 2); + if (Success == true) + Success &= FileFd::Write(client, "\r\n", 2); std::clog << "<<<<<<<<<<<<<<<<" << std::endl; return Success; -} /*}}}*/ - -bool sendFile(int client, FileFd &data) { /*{{{*/ +} + /*}}}*/ +static bool sendFile(int const client, std::list<std::string> const &headers, FileFd &data)/*{{{*/ +{ bool Success = true; + bool const chunked = chunkedTransferEncoding(headers); char buffer[500]; unsigned long long actual = 0; - while ((Success &= data.Read(buffer, sizeof(buffer), &actual)) == true) { + while ((Success &= data.Read(buffer, sizeof(buffer), &actual)) == true) + { if (actual == 0) break; - Success &= FileFd::Write(client, buffer, actual); + + if (chunked == true) + { + std::string size; + strprintf(size, "%llX\r\n", actual); + Success &= FileFd::Write(client, size.c_str(), size.size()); + Success &= FileFd::Write(client, buffer, actual); + Success &= FileFd::Write(client, "\r\n", strlen("\r\n")); + } + else + Success &= FileFd::Write(client, buffer, actual); + } + if (chunked == true) + { + char const * const finish = "0\r\n\r\n"; + Success &= FileFd::Write(client, finish, strlen(finish)); } - Success &= FileFd::Write(client, "\r\n", 2); + if (Success == false) + std::cerr << "SENDFILE:" << (chunked ? " CHUNKED" : "") << " READ/WRITE ERROR to " << client << std::endl; return Success; -} /*}}}*/ +} + /*}}}*/ +static bool sendData(int const client, std::list<std::string> const &headers, std::string const &data)/*{{{*/ +{ + if (chunkedTransferEncoding(headers) == true) + { + unsigned long long const ullsize = data.length(); + std::string size; + strprintf(size, "%llX\r\n", ullsize); + char const * const finish = "\r\n0\r\n\r\n"; + if (FileFd::Write(client, size.c_str(), size.length()) == false || + FileFd::Write(client, data.c_str(), ullsize) == false || + FileFd::Write(client, finish, strlen(finish)) == false) + { + std::cerr << "SENDDATA: CHUNK WRITE ERROR to " << client << std::endl; + return false; + } + } + else if (FileFd::Write(client, data.c_str(), data.size()) == false) + { + std::cerr << "SENDDATA: WRITE ERROR to " << client << std::endl; + return false; + } + return true; +} + /*}}}*/ +static void sendError(int const client, int const httpcode, std::string const &request,/*{{{*/ + bool const content, std::string const &error, std::list<std::string> &headers) +{ + std::string response("<!doctype html><html><head><title>"); + response.append(httpcodeToStr(httpcode)).append("</title><meta charset=\"utf-8\" /></head>"); + response.append("<body><h1>").append(httpcodeToStr(httpcode)).append("</h1>"); + if (httpcode != 200) + response.append("<p><em>Error</em>: "); + else + response.append("<p><em>Success</em>: "); + if (error.empty() == false) + response.append(error); + else + response.append(httpcodeToStr(httpcode)); + if (httpcode != 200) + response.append("</p>This error is a result of the request: <pre>"); + else + response.append("The successfully executed operation was requested by: <pre>"); + response.append(request).append("</pre></body></html>"); + if (httpcode != 200) + { + if (_config->FindB("aptwebserver::closeOnError", false) == true) + headers.push_back("Connection: close"); + } + addDataHeaders(headers, response); + sendHead(client, httpcode, headers); + if (content == true) + sendData(client, headers, response); +} +static void sendSuccess(int const client, std::string const &request, + bool const content, std::string const &error, std::list<std::string> &headers) +{ + sendError(client, 200, request, content, error, headers); +} + /*}}}*/ +static 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("<!doctype html><html><head><title>"); + response.append(httpcodeToStr(httpcode)).append("</title><meta charset=\"utf-8\" /></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 && strncmp(uri.c_str(), "https://", 8) != 0) + { + std::string const host = LookupTag(request, "Host"); + unsigned int const httpsport = _config->FindI("aptwebserver::port::https", 4433); + std::string hosthttpsport; + strprintf(hosthttpsport, ":%u", httpsport); + if (host.find(hosthttpsport) != std::string::npos) + location.append("https://"); + else + location.append("http://"); + location.append(host).append("/"); + if (strncmp("/home/", uri.c_str(), strlen("/home/")) == 0 && uri.find("/public_html/") != std::string::npos) + { + std::string homeuri = SubstVar(uri, "/home/", "~"); + homeuri = SubstVar(homeuri, "/public_html/", "/"); + location.append(homeuri); + } + else + location.append(uri); + } + else + location.append(uri); + headers.push_back(location); + sendHead(client, httpcode, headers); + if (content == true) + sendData(client, headers, response); +} + /*}}}*/ +static 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; +} +static 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); +} + /*}}}*/ +static void sendDirectoryListing(int const client, std::string const &dir,/*{{{*/ + std::string const &request, bool content, std::list<std::string> &headers) +{ + std::ostringstream listing; -bool sendData(int client, std::string &data) { /*{{{*/ - bool Success = true; - Success &= FileFd::Write(client, data.c_str(), data.size()); - Success &= FileFd::Write(client, "\r\n", 2); - return Success; -} /*}}}*/ + 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, "scandir failed", headers); + return; + } -void sendError(int client, int httpcode, string request, bool content) { /*{{{*/ - std::list<std::string> headers; - string response; - if (content == true) { - response.append("<html><head><title>"); - response.append(httpcodeToStr(httpcode)).append("</title></head>"); - response.append("<body><h1>").append(httpcodeToStr(httpcode)).append("</h1"); - response.append("This error is a result of the request: <pre>"); - response.append(request).append("</pre></body></html>"); + listing << "<!doctype html><html><head><title>Index of " << dir << "</title><meta charset=\"utf-8\" />" + << "<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, true) << "</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, headers, response); +} + /*}}}*/ +static bool parseFirstLine(int const client, std::string const &request,/*{{{*/ + std::string &filename, std::string ¶ms, bool &sendContent, + bool &closeConnection, std::list<std::string> &headers) +{ + if (strncmp(request.c_str(), "HEAD ", 5) == 0) + sendContent = false; + if (strncmp(request.c_str(), "GET ", 4) != 0) + { + sendError(client, 501, request, true, "", headers); + 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", headers); + 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", headers); + return false; + } + + filename = request.substr(filestart, fileend - filestart); + if (filename.find(' ') != std::string::npos) + { + sendError(client, 500, request, sendContent, "Filename contains an unencoded space", headers); + return false; + } + + std::string host = LookupTag(request, "Host", ""); + if (host.empty() == true) + { + // RFC 2616 §14.23 requires Host + sendError(client, 400, request, sendContent, "Host header is required", headers); + return false; + } + host = "http://" + host; + + // Proxies require absolute uris, so this is a simple proxy-fake option + std::string const absolute = _config->Find("aptwebserver::request::absolute", "uri,path"); + if (strncmp(host.c_str(), filename.c_str(), host.length()) == 0 && APT::String::Startswith(filename, "/_config/") == false) + { + if (absolute.find("uri") == std::string::npos) + { + sendError(client, 400, request, sendContent, "Request is absoluteURI, but configured to not accept that", headers); + return false; + } + + // strip the host from the request to make it an absolute path + filename.erase(0, host.length()); + + std::string const authConf = _config->Find("aptwebserver::proxy-authorization", ""); + std::string auth = LookupTag(request, "Proxy-Authorization", ""); + if (authConf.empty() != auth.empty()) + { + if (auth.empty()) + sendError(client, 407, request, sendContent, "Proxy requires authentication", headers); + else + sendError(client, 407, request, sendContent, "Client wants to authenticate to proxy, but proxy doesn't need it", headers); + return false; + } + if (authConf.empty() == false) + { + char const * const basic = "Basic "; + if (strncmp(auth.c_str(), basic, strlen(basic)) == 0) + { + auth.erase(0, strlen(basic)); + if (auth != authConf) + { + sendError(client, 407, request, sendContent, "Proxy-Authentication doesn't match", headers); + return false; + } + } + else + { + std::list<std::string> headers; + headers.push_back("Proxy-Authenticate: Basic"); + sendError(client, 407, request, sendContent, "Unsupported Proxy-Authentication Scheme", headers); + return false; + } + } + } + else if (absolute.find("path") == std::string::npos && APT::String::Startswith(filename, "/_config/") == false) + { + sendError(client, 400, request, sendContent, "Request is absolutePath, but configured to not accept that", headers); + return false; + } + + if (APT::String::Startswith(filename, "/_config/") == false) + { + std::string const authConf = _config->Find("aptwebserver::authorization", ""); + std::string auth = LookupTag(request, "Authorization", ""); + if (authConf.empty() != auth.empty()) + { + if (auth.empty()) + sendError(client, 401, request, sendContent, "Server requires authentication", headers); + else + sendError(client, 401, request, sendContent, "Client wants to authenticate to server, but server doesn't need it", headers); + return false; + } + if (authConf.empty() == false) + { + char const * const basic = "Basic "; + if (strncmp(auth.c_str(), basic, strlen(basic)) == 0) + { + auth.erase(0, strlen(basic)); + if (auth != authConf) + { + sendError(client, 401, request, sendContent, "Authentication doesn't match", headers); + return false; + } + } + else + { + headers.push_back("WWW-Authenticate: Basic"); + sendError(client, 401, request, sendContent, "Unsupported Authentication Scheme", headers); + return false; + } + } + } + + size_t paramspos = filename.find('?'); + if (paramspos != std::string::npos) + { + params = filename.substr(paramspos + 1); + filename.erase(paramspos); + } + + 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) + { + std::list<std::string> headers; + sendError(client, 400, request, sendContent, "Filename contains illegal character (sequence)", headers); + return false; + } + + // nuke the first character which is a / as we assured above + filename.erase(0, 1); + if (filename.empty() == true) + filename = "./"; + // support ~user/ uris to refer to /home/user/public_html/ as a kind-of special directory + else if (filename[0] == '~') + { + // /home/user is actually not entirely correct, but good enough for now + size_t dashpos = filename.find('/'); + if (dashpos != std::string::npos) + { + std::string home = filename.substr(1, filename.find('/') - 1); + std::string pubhtml = filename.substr(filename.find('/') + 1); + filename = "/home/" + home + "/public_html/" + pubhtml; + } + else + filename = "/home/" + filename.substr(1) + "/public_html/"; + } + + // if no filename is given, but a valid directory see if we can use an index or + // have to resort to a autogenerated directory listing later on + if (DirectoryExists(filename) == true) + { + std::string const directoryIndex = _config->Find("aptwebserver::directoryindex"); + if (directoryIndex.empty() == false && directoryIndex == flNotDir(directoryIndex) && + RealFileExists(filename + directoryIndex) == true) + filename += directoryIndex; + } + + return true; +} + /*}}}*/ +static bool handleOnTheFlyReconfiguration(int const client, std::string const &request,/*{{{*/ + std::vector<std::string> parts, std::list<std::string> &headers) +{ + size_t const pcount = parts.size(); + for (size_t i = 0; i < pcount; ++i) + parts[i] = DeQuoteString(parts[i]); + if (pcount == 4 && parts[1] == "set") + { + _config->Set(parts[2], parts[3]); + sendSuccess(client, request, true, "Option '" + parts[2] + "' was set to '" + parts[3] + "'!", headers); + return true; + } + else if (pcount == 4 && parts[1] == "find") + { + std::string response = _config->Find(parts[2], parts[3]); addDataHeaders(headers, response); + sendHead(client, 200, headers); + sendData(client, headers, response); + return true; } - sendHead(client, httpcode, headers); - sendData(client, response); -} /*}}}*/ + else if (pcount == 3 && parts[1] == "find") + { + if (_config->Exists(parts[2]) == true) + { + std::string response = _config->Find(parts[2]); + addDataHeaders(headers, response); + sendHead(client, 200, headers); + sendData(client, headers, response); + return true; + } + sendError(client, 404, request, true, "Requested Configuration option doesn't exist", headers); + return false; + } + else if (pcount == 3 && parts[1] == "clear") + { + _config->Clear(parts[2]); + sendSuccess(client, request, true, "Option '" + parts[2] + "' was cleared.", headers); + return true; + } + + sendError(client, 400, request, true, "Unknown on-the-fly configuration request", headers); + return false; +} + /*}}}*/ +static void * handleClient(void * voidclient) /*{{{*/ +{ + int client = *((int*)(voidclient)); + std::clog << "ACCEPT client " << client << std::endl; + bool closeConnection = false; + while (closeConnection == false) + { + std::vector<std::string> messages; + if (ReadMessages(client, messages) == false) + break; + + std::list<std::string> headers; + for (std::vector<std::string>::const_iterator m = messages.begin(); + m != messages.end() && closeConnection == false; ++m) { + // if we announced a closing in previous response, do the close now + if (std::find(headers.begin(), headers.end(), std::string("Connection: close")) != headers.end()) + { + closeConnection = true; + break; + } + headers.clear(); + + std::clog << ">>> REQUEST from " << client << " >>>" << std::endl << *m + << std::endl << "<<<<<<<<<<<<<<<<" << std::endl; + std::string filename; + std::string params; + bool sendContent = true; + if (parseFirstLine(client, *m, filename, params, sendContent, closeConnection, headers) == false) + continue; + + // special webserver command request + if (filename.length() > 1 && filename[0] == '_') + { + std::vector<std::string> parts = VectorizeString(filename, '/'); + if (parts[0] == "_config") + { + handleOnTheFlyReconfiguration(client, *m, parts, headers); + 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); + if (redirect.empty() == false && redirect[0] == '/') + redirect.erase(0,1); + if (redirect != filename) + { + sendRedirect(client, _config->FindI("aptwebserver::redirect::httpcode", 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, headers); + 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 + unsigned int const httpsport = _config->FindI("aptwebserver::port::https", 4433); + std::string hosthttpsport; + strprintf(hosthttpsport, ":%u", httpsport); + if (_config->FindB("aptwebserver::support::http", true) == false && + LookupTag(*m, "Host").find(hosthttpsport) == std::string::npos) + { + sendError(client, 400, *m, sendContent, "HTTP disabled, all requests must be HTTPS", headers); + continue; + } + else if (RealFileExists(filename) == true) + { + FileFd data(filename, FileFd::ReadOnly); + std::string condition = LookupTag(*m, "If-Modified-Since", ""); + if (_config->FindB("aptwebserver::support::modified-since", true) == true && condition.empty() == false) + { + time_t cache; + if (RFC1123StrToTime(condition.c_str(), cache) == true && + cache >= data.ModificationTime()) + { + sendHead(client, 304, headers); + continue; + } + } + + if (_config->FindB("aptwebserver::support::range", true) == true) + condition = LookupTag(*m, "Range", ""); + else + condition.clear(); + if (condition.empty() == false && strncmp(condition.c_str(), "bytes=", 6) == 0) + { + std::string ranges = ',' + _config->Find("aptwebserver::response-header::Accept-Ranges") + ','; + ranges.erase(std::remove(ranges.begin(), ranges.end(), ' '), ranges.end()); + if (ranges.find(",bytes,") == std::string::npos) + { + // we handle it as an error here because we are a test server - a real one should just ignore it + sendError(client, 400, *m, sendContent, "Client does range requests we don't support", headers); + continue; + } + + time_t cache; + std::string ifrange; + if (_config->FindB("aptwebserver::support::if-range", true) == true) + ifrange = LookupTag(*m, "If-Range", ""); + bool validrange = (ifrange.empty() == true || + (RFC1123StrToTime(ifrange.c_str(), cache) == true && + cache <= data.ModificationTime())); + + // FIXME: support multiple byte-ranges (APT clients do not do this) + if (condition.find(',') == std::string::npos) + { + size_t start = 6; + unsigned long long filestart = strtoull(condition.c_str() + start, NULL, 10); + // FIXME: no support for last-byte-pos being not the end of the file (APT clients do not do this) + 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 && fileend >= filestart)) && + validrange == true) + { + if (filesize > filestart) + { + data.Skip(filestart); + // make sure to send content-range before conent-length + // as regression test for LP: #1445239 + std::ostringstream contentrange; + contentrange << "Content-Range: bytes " << filestart << "-" + << filesize - 1 << "/" << filesize; + headers.push_back(contentrange.str()); + std::ostringstream contentlength; + contentlength << "Content-Length: " << (filesize - filestart); + headers.push_back(contentlength.str()); + sendHead(client, 206, headers); + if (sendContent == true) + sendFile(client, headers, data); + continue; + } + else + { + if (_config->FindB("aptwebserver::support::content-range", true) == true) + { + std::ostringstream contentrange; + contentrange << "Content-Range: bytes */" << filesize; + headers.push_back(contentrange.str()); + } + sendError(client, 416, *m, sendContent, "", headers); + continue; + } + } + } + } -int main(int argc, const char *argv[]) + addFileHeaders(headers, data); + sendHead(client, 200, headers); + if (sendContent == true) + sendFile(client, headers, data); + } + else if (DirectoryExists(filename) == true) + { + if (filename[filename.length()-1] == '/') + sendDirectoryListing(client, filename, *m, sendContent, headers); + else + sendRedirect(client, 301, filename.append("/"), *m, sendContent); + } + else + sendError(client, 404, *m, sendContent, "", headers); + } + + // if we announced a closing in the last response, do the close now + if (std::find(headers.begin(), headers.end(), std::string("Connection: close")) != headers.end()) + closeConnection = true; + + if (_error->PendingError() == true) + break; + _error->DumpErrors(std::cerr); + } + _error->DumpErrors(std::cerr); + close(client); + std::clog << "CLOSE client " << client << std::endl; + return NULL; +} + /*}}}*/ + +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}, + {0, "request-absolute", "aptwebserver::request::absolute", CommandLine::HasArg}, + {0, "authorization", "aptwebserver::authorization", CommandLine::HasArg}, + {0, "proxy-authorization", "aptwebserver::proxy-authorization", 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) { + 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); + // we don't care for our slaves, so ignore their death + signal(SIGCHLD, SIG_IGN); + int sock = socket(AF_INET6, SOCK_STREAM, 0); - if(sock < 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); + int 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 to an address + // to not linger on an address int const enable = 1; setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &enable, sizeof(enable)); @@ -184,81 +857,115 @@ int main(int argc, const char *argv[]) locAddr.sin6_port = htons(port); locAddr.sin6_addr = in6addr_any; - if (bind(sock, (struct sockaddr*) &locAddr, sizeof(locAddr)) < 0) { + 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; + if (port == 0) + { + struct sockaddr_in6 addr; + socklen_t addrlen = sizeof(sockaddr_in6); + if (getsockname(sock, (struct sockaddr*) &addr, &addrlen) != 0) + _error->Errno("getsockname", "Could not get chosen port number"); + else + port = ntohs(addr.sin6_port); } + std::string const portfilename = _config->Find("aptwebserver::portfile", ""); + if (portfilename.empty() == false) + { + FileFd portfile(portfilename, FileFd::WriteOnly | FileFd::Create | FileFd::Empty); + std::string portcontent; + strprintf(portcontent, "%d", port); + portfile.Write(portcontent.c_str(), portcontent.size()); + portfile.Sync(); + } + _config->Set("aptwebserver::port::http", port); - listen(sock, 1); + 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; + } - std::vector<std::string> messages; - int client; - while ((client = accept(sock, NULL, NULL)) != -1) { - std::clog << "ACCEPT client " << client - << " on socket " << sock << std::endl; + 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()); + pidfile.Sync(); + if (_error->PendingError() == true) + { + _error->DumpErrors(std::cerr); + return 5; + } + std::cout << "Successfully forked as " << child << std::endl; + return 0; + } + } - while (ReadMessages(client, messages)) { - for (std::vector<std::string>::const_iterator m = messages.begin(); - m != messages.end(); ++m) { - std::clog << ">>> REQUEST >>>>" << std::endl << *m - << std::endl << "<<<<<<<<<<<<<<<<" << std::endl; - std::list<std::string> headers; - bool sendContent = true; - if (strncmp(m->c_str(), "HEAD ", 5) == 0) - sendContent = false; - if (strncmp(m->c_str(), "GET ", 4) != 0) - sendError(client, 501, *m, true); - - std::string host = LookupTag(*m, "Host", ""); - if (host.empty() == true) { - // RFC 2616 §14.23 Host - sendError(client, 400, *m, sendContent); - continue; - } + std::clog << "Serving ANY file on port: " << port << std::endl; - size_t const filestart = m->find(' ', 5); - string filename = m->substr(5, filestart - 5); - - if (simulate_broken_server == true) { - string data("ni ni ni\n"); - addDataHeaders(headers, data); - sendHead(client, 200, headers); - sendData(client, data); - } - else if (RealFileExists(filename) == false) - sendError(client, 404, *m, sendContent); - else { - 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()) { - sendError(client, 304, *m, false); - continue; - } - } - addFileHeaders(headers, data); - sendHead(client, 200, headers); - if (sendContent == true) - sendFile(client, data); - } - } + int const slaves = _config->FindI("aptwebserver::slaves", SOMAXCONN); + std::cerr << "SLAVES: " << slaves << std::endl; + listen(sock, slaves); + /*}}}*/ + + _config->CndSet("aptwebserver::response-header::Server", "APT webserver"); + _config->CndSet("aptwebserver::response-header::Accept-Ranges", "bytes"); + _config->CndSet("aptwebserver::directoryindex", "index.html"); + + std::list<int> accepted_clients; + + while (true) + { + int client = accept(sock, NULL, NULL); + if (client == -1) + { + if (errno == EINTR) + continue; + _error->Errno("accept", "Couldn't accept client on socket %d", sock); _error->DumpErrors(std::cerr); - messages.clear(); + return 6; } - std::clog << "CLOSE client " << client - << " on socket " << sock << std::endl; - close(client); + pthread_attr_t attr; + if (pthread_attr_init(&attr) != 0 || pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED) != 0) + { + _error->Errno("pthread_attr", "Couldn't set detach attribute for a fresh thread to handle client %d on socket %d", client, sock); + _error->DumpErrors(std::cerr); + close(client); + continue; + } + + pthread_t tid; + // thats rather dirty, but we need to store the client socket somewhere safe + accepted_clients.push_front(client); + if (pthread_create(&tid, &attr, &handleClient, &(*accepted_clients.begin())) != 0) + { + _error->Errno("pthread_create", "Couldn't create a fresh thread to handle client %d on socket %d", client, sock); + _error->DumpErrors(std::cerr); + close(client); + continue; + } } + pidfile.Close(); + return 0; }