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// Smersh |
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// |
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// Douglas Thrift |
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// |
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// $Id$ |
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|
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#include <arpa/inet.h> |
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|
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#include "Daemon.hpp" |
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|
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string Daemon::crlf("\r\n"); |
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|
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void Daemon::serve(int port, bool fork, Daemon* self) |
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{ |
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api::TcpSocket server; |
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|
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server.Create(); |
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server.SetAddress(api::InternetAddress(api::InternetAddress::Any, port)); |
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|
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if (fork) |
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{ |
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switch (::fork()) |
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{ |
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case -1: |
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cerr << program << ": fork()\n"; |
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|
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exit(1); |
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case 0: |
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break; |
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default: |
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return; |
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} |
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} |
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|
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server.Listen(50); |
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|
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while (true) |
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{ |
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api::TcpSocket* client(new api::TcpSocket()); |
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|
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server.Accept(*client); |
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|
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api::Thread thread(etl::BindAll(&Daemon::handle, self, client)); |
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} |
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} |
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|
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Daemon::Status Daemon::request(istream& sin, Environment& env, ostream& post, |
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ostream& log) |
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{ |
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string line; |
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Matcher request("^([A-Z]+) .*?(\\?.+)? HTTP/(\\d+)\\.(\\d+)$"); |
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|
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getline(sin, line); |
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|
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log << '"' << line << "\" "; |
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|
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env.put("HTTP_REFERER=-"); |
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env.put("HTTP_USER_AGENT=-"); |
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|
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if (line == request) |
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{ |
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if (lexical_cast<unsigned>(request[3]) > 1) return version; |
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|
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Matcher method("^GET|HEAD|POST$"); |
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|
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if (request[1] != method) return notImplemented; |
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|
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env.set("REQUEST_METHOD", method); |
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|
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if (!request[2].empty()) env.set("QUERY_STRING", request[2].substr(1)); |
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|
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headers(sin, env); |
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|
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if (method[0] == "POST") return message(sin, env, post); |
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|
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return ok; |
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} |
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|
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return notFound; |
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} |
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|
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void Daemon::response(ostream& sout, Status status) |
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{ |
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sout << "HTTP/1.1 " << status << ' ' << reason(status) << crlf << "Date: " |
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<< date() << crlf << "Server: Smersh/0.9" << crlf |
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<< "Connection: close" << crlf; |
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} |
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|
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streamsize Daemon::error(ostream& sout, Status status) |
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{ |
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string reason(this->reason(status)); |
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ostringstream error; |
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|
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error << "<html><head><title>" << status << ' ' << reason << "</title></hea" |
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<< "d><body><h1>" << reason << "</h1><p>Mistakes were made, deal with t" |
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<< "hem.</p><hr /><address>Smersh/0.9</address></body></html>\n"; |
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sout << "Content-Length: " << error.str().length() << crlf |
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<< "Content-Type: text/html; charset=UTF-8\r\n\r\n" << error.str(); |
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|
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return error.str().size(); |
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} |
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|
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string Daemon::date(bool log) |
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{ |
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time_t now(time(NULL)); |
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tm time; |
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|
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if (log) localtime_r(&now, &time); else gmtime_r(&now, &time); |
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|
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const char* format(log ? "[%m/%d/%Y:%T %z]" : "%a, %d %b %Y %T GMT"); |
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char when[log ? 29 : 30]; |
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|
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strftime(when, log ? 29 : 30, format, &time); |
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|
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return when; |
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} |
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|
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string Daemon::ip(const api::TcpSocket& socket) |
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{ |
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api::InternetAddress address(socket.GetAddress()); |
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|
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return inet_ntoa(address->sin_addr); |
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} |
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|
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int Daemon::handle(api::TcpSocket* client) |
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{ |
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ios::InputOutputStreamBufAdapter adapter(*client); |
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iostream sio(&adapter); |
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Environment env; |
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stringstream post; |
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ostringstream log; |
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Status code(request(sio, env, post, log)); |
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|
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response(sio, code); |
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|
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bool head(env.get("REQUEST_METHOD") == "HEAD"); |
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streamsize sent(0); |
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|
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if (code == ok && !head) |
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{ |
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ostringstream output; |
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Smersh smersh(post, output, env); |
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string content(output.str().substr(40)); |
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|
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sio << "Content-Length: " << content.length() << crlf |
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<< "Content-Type: text/html; charset=UTF-8\r\n\r\n"; |
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|
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sio.write(content.data(), content.size()); |
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|
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sent = content.size(); |
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} |
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else if (head) sio << "Content-Type: text/html; charset=UTF-8\r\n\r\n"; |
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else sent = error(sio, code); |
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|
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log << code << ' ' << (sent > 0 ? lexical_cast<string>(sent) : string("0")) |
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<< " \"" << env.get("HTTP_REFERER") << "\" \"" |
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<< env.get("HTTP_USER_AGENT") << '"'; |
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|
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ofstream fout(this->log.c_str(), ios_base::app); |
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|
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fout << ip(*client) << " - - " << date(true) << ' ' << log.str() << '\n'; |
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|
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delete client; |
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} |
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|
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void Daemon::headers(istream& sin, Environment& env) |
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{ |
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do |
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{ |
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string line; |
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|
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getline(sin, line); |
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|
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if (line.empty()) break; |
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|
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istringstream input(line); |
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string name, value; |
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|
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::getline(input, name, ':'); |
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getline(input, value); |
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|
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for (char next(sin.peek()); next == ' ' || next == '\t'; next = |
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sin.peek()) |
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{ |
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getline(sin, line); |
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|
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value += ' ' + line; |
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} |
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|
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Matcher matcher("^\\s*(.+)\\s*$"); |
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|
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if (name == "Content-Length") |
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{ |
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if (value == matcher) env.set("CONTENT_LENGTH", matcher[1]); |
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} |
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else if (name == "Content-Type") |
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{ |
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if (value == matcher) env.set("CONTENT_TYPE", matcher[1]); |
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} |
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else if (name == "Referer") |
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{ |
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if (value == matcher) env.set("HTTP_REFERER", matcher[1]); |
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} |
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else if (name == "User-Agent") |
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{ |
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if (value == matcher) env.set("HTTP_USER_AGENT", matcher[1]); |
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} |
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} |
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while (sin.good()); |
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} |
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|
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Daemon::Status Daemon::message(istream& sin, Environment& env, ostream& post) |
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{ |
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string contentLength(env.get("CONTENT_LENGTH")); |
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|
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if (env.get("CONTENT_TYPE") != "application/x-www-form-urlencoded") return |
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mediaType; |
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if (contentLength.empty()) return lengthRequired; |
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|
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streamsize length(lexical_cast<streamsize>(contentLength)); |
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char* content(new char[length]); |
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|
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sin.read(content, length); |
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post.write(content, length); |
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|
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delete [] content; |
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|
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return ok; |
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} |
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|
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string Daemon::reason(Status status) |
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{ |
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ostringstream sout; |
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|
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switch (status) |
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{ |
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case ok: |
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sout << "OK"; |
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break; |
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case found: |
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sout << "Found"; |
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break; |
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case seeOther: |
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sout << "See Other"; |
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break; |
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case bad: |
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sout << "Bad Request"; |
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break; |
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case notFound: |
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sout << "Not Found"; |
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break; |
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case lengthRequired: |
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sout << "Length Required"; |
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break; |
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case mediaType: |
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sout << "Unsupported Media Type"; |
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break; |
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case serverError: |
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sout << "Internal Server Error"; |
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break; |
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case notImplemented: |
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sout << "Not Implemented"; |
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break; |
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case version: |
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sout << "HTTP Version not supported"; |
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} |
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|
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return sout.str(); |
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} |
