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Diffstat (limited to 'test/interactive-helper/aptwebserver.cc')
| -rw-r--r-- | test/interactive-helper/aptwebserver.cc | 1091 |
1 files changed, 1091 insertions, 0 deletions
diff --git a/test/interactive-helper/aptwebserver.cc b/test/interactive-helper/aptwebserver.cc new file mode 100644 index 0000000..f4f8d95 --- /dev/null +++ b/test/interactive-helper/aptwebserver.cc @@ -0,0 +1,1091 @@ +#include <config.h> + +#include <apt-pkg/cmndline.h> +#include <apt-pkg/configuration.h> +#include <apt-pkg/error.h> +#include <apt-pkg/fileutl.h> +#include <apt-pkg/strutl.h> + +#include "teestream.h" + +#include <dirent.h> +#include <errno.h> +#include <netinet/in.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 <array> +#include <algorithm> +#include <fstream> +#include <iostream> +#include <list> +#include <sstream> +#include <string> +#include <thread> +#include <unordered_map> +#include <vector> + +static std::string HTMLEncode(std::string encode) /*{{{*/ +{ + constexpr std::array<std::array<char const *,2>,6> htmlencode = {{ + {{ "&", "&" }}, + {{ "<", "<" }}, + {{ ">", ">" }}, + {{ "\"", """ }}, + {{ "'", "'" }}, + {{ "/", "/" }}, + }}; + for (auto &&h: htmlencode) + encode = SubstVar(encode, h[0], h[1]); + return encode; +} + /*}}}*/ +static std::string httpcodeToStr(int const httpcode) /*{{{*/ +{ + switch (httpcode) + { + // Informational 1xx + 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 _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 _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"); + case 308: return _config->Find("aptwebserver::httpcode::308", "308 Permanent Redirect"); + // Client errors 4xx + 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 _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"); + } + std::string codeconf, code; + strprintf(codeconf, "aptwebserver::httpcode::%i", httpcode); + strprintf(code, "%i Unknown HTTP code", httpcode); + return _config->Find(codeconf, code); +} + /*}}}*/ +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 bool contentTypeSet(std::list<std::string> const &headers) /*{{{*/ +{ + return std::any_of(headers.begin(), headers.end(), [](std::string const &h) { return APT::String::Startswith(h, "Content-Type:"); }); +} + /*}}}*/ +// contentTypeFromExtension /*{{{*/ +static std::string contentTypeFromExtension(std::string const &ext) +{ + auto t = _config->Find(std::string("aptwebserver::content-type::by-extension::").append(ext)); + if (APT::String::Startswith(t, "text/")) + return t.append("; charset=utf-8"); + return t; +} + /*}}}*/ +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); + } + if (_config->FindB("aptwebserver::content-type::guess", true) && + data.FileSize() != 0 && + contentTypeSet(headers) == false) + { + std::string const name = data.Name(); + std::string ext = flExtension(name); + if (name.empty() == false && ext.empty() == false && name != ext) + { + std::transform(ext.begin(), ext.end(), ext.begin(), ::tolower); + auto const type = contentTypeFromExtension(ext); + if (type.empty() == false) + headers.push_back(std::string("Content-Type: ").append(type)); + } + } +} + /*}}}*/ +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(std::ostream &log, 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); + + std::stringstream buffer; + auto const empties = _config->FindVector("aptwebserver::empty-response-header"); + for (auto const &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), false)); + headers.push_back(date); + + if (chunkedTransferEncoding(headers) == true) + headers.push_back("Transfer-Encoding: chunked"); + + log << ">>> 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 &= FileFd::Write(client, h->c_str(), h->size()); + if (Success == true) + Success &= FileFd::Write(client, "\r\n", 2); + log << *h << std::endl; + } + if (Success == true) + Success &= FileFd::Write(client, "\r\n", 2); + log << "<<<<<<<<<<<<<<<<" << std::endl; + return Success; +} + /*}}}*/ +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) + { + if (actual == 0) + break; + + 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)); + } + 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(std::ostream &log, int const client, int const httpcode, std::string const &request,/*{{{*/ + bool const content, std::string const &error, std::list<std::string> &headers) +{ + auto const quotedCode = HTMLEncode(httpcodeToStr(httpcode)); + std::string response("<!doctype html><html><head><title>"); + response.append(quotedCode).append("</title><meta charset=\"utf-8\" /></head>"); + response.append("<body><h1>").append(quotedCode).append("</h1>"); + if (httpcode != 200) + response.append("<p><em>Error</em>: "); + else + response.append("<p><em>Success</em>: "); + if (error.empty() == false) + response.append(HTMLEncode(error)); + else + response.append(quotedCode); + 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(HTMLEncode(request)).append("</pre></body></html>"); + if (httpcode != 200) + { + if (_config->FindB("aptwebserver::closeOnError", false) == true) + headers.push_back("Connection: close"); + } + addDataHeaders(headers, response); + + if (contentTypeSet(headers) == false) + headers.push_back("Content-Type: text/html; charset=utf-8"); + + sendHead(log, client, httpcode, headers); + if (content == true) + sendData(client, headers, response); +} +static void sendSuccess(std::ostream &log, int const client, std::string const &request, + bool const content, std::string const &error, std::list<std::string> &headers) +{ + sendError(log, client, 200, request, content, error, headers); +} + /*}}}*/ +static void sendRedirect(std::ostream &log, int const client, int const httpcode,/*{{{*/ + std::string const &uri, std::string const &request, bool content) +{ + std::list<std::string> headers; + auto const quotedCode = HTMLEncode(httpcodeToStr(httpcode)); + std::string response("<!doctype html><html><head><title>"); + response.append(quotedCode).append("</title><meta charset=\"utf-8\" /></head>"); + response.append("<body><h1>").append(quotedCode).append("</h1"); + response.append("<p>You should be redirected to <em>").append(HTMLEncode(uri)).append("</em></p>"); + response.append("This page is a result of the request: <pre>"); + response.append(HTMLEncode(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); + + if (contentTypeSet(headers) == false) + headers.push_back("Content-Type: text/html; charset=utf-8"); + + sendHead(log, 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(std::ostream &log, int const client, std::string const &dir,/*{{{*/ + std::string const &request, bool content, std::list<std::string> &headers) +{ + struct dirent **namelist; + int const counter = scandir(dir.c_str(), &namelist, filter_hidden_files, grouped_alpha_case_sort); + if (counter == -1) + { + sendError(log, client, 500, request, content, "scandir failed", headers); + return; + } + + std::ostringstream listing; + std::string const quotedDir = HTMLEncode(dir); + listing << "<!doctype html><html><head><title>Index of " << quotedDir << "</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 " << quotedDir << "</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); + std::string const quotedHref = QuoteString(namelist[i]->d_name, "\"\\/#?"); + std::string const quotedName = HTMLEncode(namelist[i]->d_name); + bool const isDir = S_ISDIR(fs.st_mode); + listing << "<tr><td>" << (isDir ? 'd' : 'f') << "</td>" + << "<td><a href=\"./" << quotedHref << (isDir ? "/" : "") <<"\">" << quotedName << "</a></td>" + << "<td>" << (isDir ? "-" : SizeToStr(fs.st_size).append("B")) << "</td>" + << "<td>" << TimeRFC1123(fs.st_mtime, true) << "</td></tr>\n"; + } + listing << "</table></body></html>" << std::endl; + + if (contentTypeSet(headers) == false) + headers.push_back("Content-Type: text/html; charset=utf-8"); + + std::string response(listing.str()); + addDataHeaders(headers, response); + sendHead(log, client, 200, headers); + if (content == true) + sendData(client, headers, response); +} + /*}}}*/ +static bool parseFirstLine(std::ostream &log, 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(log, 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(log, 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(log, client, 500, request, sendContent, "Not an HTTP/1.{0,1} request", headers); + return false; + } + + filename = request.substr(filestart, fileend - filestart); + if (filename.find(' ') != std::string::npos) + { + sendError(log, 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(log, 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(log, 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(log, client, 407, request, sendContent, "Proxy requires authentication", headers); + else + sendError(log, 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(log, 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(log, 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(log, 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(log, client, 401, request, sendContent, "Server requires authentication", headers); + else + sendError(log, 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(log, client, 401, request, sendContent, "Authentication doesn't match", headers); + return false; + } + } + else + { + headers.push_back("WWW-Authenticate: Basic"); + sendError(log, 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); + } + else if (APT::String::Startswith(filename, "/_config/")) + { + filename.erase(0, 1); + return true; + } + + 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(log, 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(std::ostream &log, int const client,/*{{{*/ + std::string const &request, std::vector<std::string> const &EncodedParts, std::list<std::string> &headers) +{ + size_t const pcount = EncodedParts.size(); + std::vector<std::string> parts(pcount); + for (size_t i = 0; i < pcount; ++i) + parts[i] = DeQuoteString(EncodedParts[i]); + if (pcount == 4 && parts[1] == "set") + { + _config->Set(parts[2], parts[3]); + sendSuccess(log, 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); + if (contentTypeSet(headers) == false) + headers.push_back("Content-Type: text/plain; charset=utf-8"); + sendHead(log, client, 200, headers); + sendData(client, headers, response); + return true; + } + else if (pcount == 3 && parts[1] == "find") + { + if (_config->Exists(parts[2]) == true) + { + std::string response = _config->Find(parts[2]); + addDataHeaders(headers, response); + if (contentTypeSet(headers) == false) + headers.push_back("Content-Type: text/plain; charset=utf-8"); + sendHead(log, client, 200, headers); + sendData(client, headers, response); + return true; + } + sendError(log, 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(log, client, request, true, "Option '" + parts[2] + "' was cleared.", headers); + return true; + } + + sendError(log, client, 400, request, true, "Unknown on-the-fly configuration request", headers); + return false; +} + /*}}}*/ +static void * handleClient(int const client, size_t const id) /*{{{*/ +{ + auto logfilepath = _config->FindFile("aptwebserver::logfiles"); + if (logfilepath.empty() == false) + strprintf(logfilepath, "%s.client-%lu.log", logfilepath.c_str(), id); + else + logfilepath = "/dev/null"; + std::ofstream logfile(logfilepath); + basic_teeostream<char> log(std::clog, logfile); + + log << "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(); + + log << ">>> REQUEST from " << client << " >>>" << std::endl << *m + << std::endl << "<<<<<<<<<<<<<<<<" << std::endl; + std::string filename; + std::string params; + bool sendContent = true; + if (parseFirstLine(log, client, *m, filename, params, sendContent, closeConnection, headers) == false) + continue; + + // special webserver command request + if (filename.length() > 1 && filename[0] == '_') + { + auto const parts = VectorizeString(filename, '/'); + if (parts[0] == "_config") + { + handleOnTheFlyReconfiguration(log, 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(log, 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(log, 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", flNotDir(filename)); + if (filename.find("/") == std::string::npos) + { + auto directory = _config->Find("aptwebserver::overwrite::" + I->Tag + "::directory", flNotFile(filename)); + filename = flCombine(directory, filename); + } + if (filename.empty() == false && filename[0] == '/') + filename.erase(0,1); + if (filename.empty()) + filename = "./"; + regfree(pattern); + break; + } + regfree(pattern); + } + } + + // automatic retry can be tested with this + { + int failrequests = _config->FindI("aptwebserver::failrequest::" + filename, 0); + if (failrequests != 0) + { + --failrequests; + _config->Set(("aptwebserver::failrequest::" + filename).c_str(), failrequests); + sendError(log, client, _config->FindI("aptwebserver::failrequest", 400), *m, sendContent, "Server is configured to fail this file.", headers); + continue; + } + } + + // 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(log, 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, cache) == true && + cache >= data.ModificationTime()) + { + sendHead(log, 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(log, 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, 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(log, 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(log, client, 416, *m, sendContent, "", headers); + continue; + } + } + } + } + + addFileHeaders(headers, data); + sendHead(log, client, 200, headers); + if (sendContent == true) + sendFile(client, headers, data); + } + else if (DirectoryExists(filename) == true) + { + if (filename[filename.length()-1] == '/') + sendDirectoryListing(log, client, filename, *m, sendContent, headers); + else + sendRedirect(log, client, 301, filename.append("/"), *m, sendContent); + } + else + sendError(log, 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); + log << "CLOSE client " << client << std::endl; + return NULL; +} + /*}}}*/ +static void loadMimeTypesFile(std::string const &filename) /*{{{*/ +{ + if (FileExists(filename) == false) + return; + + std::string line; + FileFd mimetypes(filename, FileFd::ReadOnly); + while (mimetypes.ReadLine(line)) + { + if (line.empty() || line[0] == '#' || line.find_first_not_of(" \t\r") == std::string::npos) + continue; + std::transform(line.begin(), line.end(), line.begin(), [](char const c) { return c == ' ' ? '\t' : c; }); + auto l = VectorizeString(line, '\t'); + l.erase(std::remove_if(l.begin(), l.end(), [](std::string const &f) { return f.empty(); }), l.end()); + if (l.size() < 2) + continue; + for (size_t i = 1; i < l.size(); ++i) + if (l[i].empty() == false) + _config->CndSet(std::string("aptwebserver::content-type::by-extension::").append(l[i]).c_str(), l[0]); + } +} + /*}}}*/ + +int main(int const argc, const char * argv[]) +{ + CommandLine::Args Args[] = { + {'p', "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}, + {0, "logfiles", "aptwebserver::logfiles", 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); + } + + if (_config->FindB("aptwebserver::content-type::mime.types", true)) + { + if (_config->FindB("aptwebserver::content-type::mime.types::apt", true)) + loadMimeTypesFile("/etc/apt/mime.types"); + + if (_config->FindB("aptwebserver::content-type::mime.types::home", true)) + { + auto const home = getenv("HOME"); + if (home != nullptr) + loadMimeTypesFile(flCombine(home, ".mime.types")); + } + + if (_config->FindB("aptwebserver::content-type::mime.types::etc", true)) + loadMimeTypesFile("/etc/mime.types"); + } + + // create socket, bind and listen to it {{{ + // ignore SIGPIPE, this can happen on write() if the socket closes connection + signal(SIGPIPE, SIG_IGN); + // ignore worker processes exiting, as we don't want to cause them to stay + // around as zombies because we're busy. + signal(SIGCHLD, 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 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; + } + + 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); + + 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()); + pidfile.Sync(); + 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; + + int const workers = _config->FindI("aptwebserver::workers", SOMAXCONN); + std::cerr << "WORKERS: " << workers << std::endl; + listen(sock, workers); + /*}}}*/ + + _config->CndSet("aptwebserver::response-header::Server", "APT webserver"); + _config->CndSet("aptwebserver::response-header::Accept-Ranges", "bytes"); + _config->CndSet("aptwebserver::directoryindex", "index.html"); + APT::Configuration::getCompressors(); + + size_t id = 0; + 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); + return 6; + } + + std::thread t(handleClient, client, ++id); + t.detach(); + } + pidfile.Close(); + + return 0; +} |