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