repos/Smersh/Daemon.cpp

// Smersh
//
// Douglas Thrift
//
// $Id$

#include "Daemon.hpp"

string Daemon::crlf("\r\n");

void Daemon::serve(bool fork, Daemon* self)
{
        api::TcpSocket server;

        server.SetAddress(api::InternetAddress(api::InternetAddress::Any, port));

        if (fork)
        {
                switch (pid_t pid = ::fork())
                {
                case -1:
                        cerr << program << ": fork()\n";

                        exit(1);
                case 0:
                        break;
                default:
                        cout << pid << '\n';
                        return;
                }
        }

        server.Listen(50);

        while (true)
        {
                Client* client (new Client(server));
                api::Thread thread(etl::BindAll(&Daemon::handle, self, client));
        }
}

Daemon::Status Daemon::request(istream& sin, Environment& env, ostream& post,
        ostream& log)
{
        string line;
        Matcher request("^([A-Z]+) (.*?)(\\?.+)? HTTP/(\\d+)\\.(\\d+)$");

        getline(sin, line);

        log << '"' << line << "\" ";

        env.put("HTTP_REFERER=-");
        env.put("HTTP_USER_AGENT=-");

        if (line == request)
        {
                if (lexical_cast<unsigned>(request[4]) > 1) return version;

                Matcher method("^GET|HEAD|POST$");

                if (request[1] != method) return notImplemented;

                env.set("REQUEST_METHOD", method);
                env.set("REQUEST_URI", request[2] + request[3]);

                if (!request[3].empty()) env.set("QUERY_STRING", request[3].substr(1));

                headers(sin, env);

                if (env.get("HTTP_HOST").empty()) return bad;
                if (method[0] == "POST") return message(sin, env, post);

                return ok;
        }

        return bad;
}

void Daemon::response(ostream& sout, Status status)
{
        sout << "HTTP/1.1 " << status << ' ' << reason(status) << crlf << "Date: "
                << date() << crlf << "Server: " << server() << crlf
                << "Connection: close" << crlf;
}

string Daemon::reason(Status status)
{
        ostringstream sout;

        switch (status)
        {
        case ok:
                sout << "OK";
                break;
        case found:
                sout << "Found";
                break;
        case seeOther:
                sout << "See Other";
                break;
        case bad:
                sout << "Bad Request";
                break;
        case notFound:
                sout << "Not Found";
                break;
        case lengthRequired:
                sout << "Length Required";
                break;
        case mediaType:
                sout << "Unsupported Media Type";
                break;
        case serverError:
                sout << "Internal Server Error";
                break;
        case notImplemented:
                sout << "Not Implemented";
                break;
        case version:
                sout << "HTTP Version not supported";
        }

        return sout.str();
}

string Daemon::server()
{
        utsname system;

        uname(&system);

        return string("Smersh/0.9 (") + system.sysname + ')';
}

string Daemon::server(const Environment& env)
{
        ostringstream server;
        string port(env.get("SERVER_PORT"));

        server << this->server() << " Server at " << env.get("SERVER_NAME") << " Po"
                << "rt " << (port.empty() ? lexical_cast<string>(this->port) : port);

        return server.str();
}

streamsize Daemon::error(ostream& sout, Status status, const Environment& env)
{
        string reason(this->reason(status));
        ostringstream error;

        error << "<html><head><title>" << status << ' ' << reason << "</title></hea"
                << "d><body><h1>" << reason << "</h1><p>Mistakes were made, deal with t"
                << "hem.</p><hr /><address>" << server(env) << "</address></body></html"
                << ">\r\n";
        sout << "Content-Length: " << error.str().length() << crlf
                << "Content-Type: text/html; charset=UTF-8\r\n\r\n" << error.str();

        return error.str().size();
}

string Daemon::date(bool log)
{
        time_t now(time(NULL));
        tm time;

        if (log) localtime_r(&now, &time); else gmtime_r(&now, &time);

        const char* format(log ? "[%m/%d/%Y:%T %z]" : "%a, %d %b %Y %T GMT");
        char when[log ? 29 : 30];

        strftime(when, log ? 29 : 30, format, &time);

        return when;
}

int Daemon::handle(Client* client)
{
        ios::ToIoStream sio(&client->socket, &client->socket);
        Environment env;
        stringstream post;
        ostringstream log;
        Status code(request(sio, env, post, log));

        if (env.get("REQUEST_URI") == "/favicon.ico") code = notFound;

        response(sio, code);

        bool head(env.get("REQUEST_METHOD") == "HEAD");
        streamsize sent(0);

        if (code == ok && env.get("REQUEST_URI") == "/robots.txt")
        {
                sio << "Content-Length: 28\r\nContent-Type: text/plain; charset=UTF-8\r"
                        << "\n\r\n";

                if (!head) { sio << "User-agent: *\r\nDisallow: /\r\n"; sent = 28; }
        }
        else if (code == ok && !head)
        {
                ostringstream content;
                Smersh smersh(post, content, env);

                sio << "Content-Length: " << content.str().length() << crlf
                        << "Content-Type: text/html; charset=UTF-8\r\n\r\n";

                sio.write(content.str().data(), content.str().size());

                sent = content.str().size();
        }
        else if (head) sio << "Content-Type: text/html; charset=UTF-8\r\n\r\n";
        else sent = error(sio, code, env);

        ofstream fout(this->log.c_str(), ios_base::app);

        fout << inet_ntoa(client->ip->sin_addr) << " - - " << date(true) << ' '
                << log.str() << code << ' ' << lexical_cast<string>(sent) << " \""
                << env.get("HTTP_REFERER") << "\" \"" << env.get("HTTP_USER_AGENT")
                << "\"\n";
        sio << flush;

        client->socket.ShutdownWrite();

        delete client;
}

void Daemon::headers(istream& sin, Environment& env)
{
        do
        {
                string line;

                getline(sin, line);

                if (line.empty()) break;

                istringstream input(line);
                string name, value;

                std::getline(input, name, ':');
                getline(input, value);

                for (char next(sin.peek()); next == ' ' || next == '\t'; next =
                        sin.peek())
                {
                        getline(sin, line);

                        value += ' ' + line;
                }

                Matcher matcher("^\\s*(.+)\\s*$");

                if (name == "Content-Length")
                {
                        if (value == matcher) env.set("CONTENT_LENGTH", matcher[1]);
                }
                else if (name == "Content-Type")
                {
                        if (value == matcher) env.set("CONTENT_TYPE", matcher[1]);
                }
                else if (name == "Host")
                {
                        Matcher matcher("^\\s*(.+?)(:[0-9]+)?\\s*$");

                        if (value == matcher)
                        {
                                bool port(matcher.size() > 2);

                                env.set("HTTP_HOST", matcher[1] + (port ? matcher[2] : ""));
                                env.set("SERVER_NAME", matcher[1]);

                                if (port) env.set("SERVER_PORT", matcher[2].substr(1));
                        }
                }
                else if (name == "Referer")
                {
                        if (value == matcher) env.set("HTTP_REFERER", matcher[1]);
                }
                else if (name == "User-Agent")
                {
                        if (value == matcher) env.set("HTTP_USER_AGENT", matcher[1]);
                }
        }
        while (sin.good());
}

Daemon::Status Daemon::message(istream& sin, Environment& env, ostream& post)
{
        string contentLength(env.get("CONTENT_LENGTH"));

        if (env.get("CONTENT_TYPE") != "application/x-www-form-urlencoded") return
                mediaType;
        if (contentLength.empty()) return lengthRequired;

        streamsize length(lexical_cast<streamsize>(contentLength));
        char* content(new char[length]);

        sin.read(content, length);
        post.write(content, length);

        delete [] content;

        return ok;
}
Revision:	205
Committed:	2004-09-01T02:31:03-07:00 (20 years, 9 months ago) by Douglas Thrift
File size:	6457 byte(s)
Log Message:	Update to latest menes API, remove Linux stuff from GNUmakefile.
#	User	Rev	Content
1	Douglas Thrift	164	// Smersh
2			//
3			// Douglas Thrift
4			//
5			// $Id$
6
7			#include "Daemon.hpp"
8
9	Douglas Thrift	175	string Daemon::crlf("\r\n");
10
11	Douglas Thrift	181	void Daemon::serve(bool fork, Daemon* self)
12	Douglas Thrift	164	{
13	Douglas Thrift	174	api::TcpSocket server;
14	Douglas Thrift	172
15	Douglas Thrift	174	server.SetAddress(api::InternetAddress(api::InternetAddress::Any, port));
16
17	Douglas Thrift	172	if (fork)
18			{
19	Douglas Thrift	179	switch (pid_t pid = ::fork())
20	Douglas Thrift	172	{
21			case -1:
22			cerr << program << ": fork()\n";
23
24			exit(1);
25			case 0:
26			break;
27			default:
28	Douglas Thrift	179	cout << pid << '\n';
29	Douglas Thrift	172	return;
30			}
31			}
32
33	Douglas Thrift	174	server.Listen(50);
34	Douglas Thrift	173
35			while (true)
36			{
37	Douglas Thrift	184	Client* client (new Client(server));
38	Douglas Thrift	174	api::Thread thread(etl::BindAll(&Daemon::handle, self, client));
39	Douglas Thrift	173	}
40	Douglas Thrift	164	}
41
42	Douglas Thrift	175	Daemon::Status Daemon::request(istream& sin, Environment& env, ostream& post,
43			ostream& log)
44			{
45			string line;
46	Douglas Thrift	180	Matcher request("^([A-Z]+) (.*?)(\\?.+)? HTTP/(\\d+)\\.(\\d+)$");
47	Douglas Thrift	175
48			getline(sin, line);
49
50			log << '"' << line << "\" ";
51
52	Douglas Thrift	176	env.put("HTTP_REFERER=-");
53			env.put("HTTP_USER_AGENT=-");
54
55	Douglas Thrift	175	if (line == request)
56			{
57	Douglas Thrift	180	if (lexical_cast<unsigned>(request[4]) > 1) return version;
58	Douglas Thrift	175
59	Douglas Thrift	176	Matcher method("^GET\|HEAD\|POST$");
60	Douglas Thrift	175
61	Douglas Thrift	176	if (request[1] != method) return notImplemented;
62	Douglas Thrift	175
63	Douglas Thrift	176	env.set("REQUEST_METHOD", method);
64	Douglas Thrift	180	env.set("REQUEST_URI", request[2] + request[3]);
65	Douglas Thrift	175
66	Douglas Thrift	180	if (!request[3].empty()) env.set("QUERY_STRING", request[3].substr(1));
67	Douglas Thrift	175
68	Douglas Thrift	176	headers(sin, env);
69	Douglas Thrift	175
70	Douglas Thrift	181	if (env.get("HTTP_HOST").empty()) return bad;
71	Douglas Thrift	176	if (method[0] == "POST") return message(sin, env, post);
72	Douglas Thrift	175
73			return ok;
74			}
75
76	Douglas Thrift	180	return bad;
77	Douglas Thrift	175	}
78
79	Douglas Thrift	176	void Daemon::response(ostream& sout, Status status)
80	Douglas Thrift	175	{
81	Douglas Thrift	177	sout << "HTTP/1.1 " << status << ' ' << reason(status) << crlf << "Date: "
82	Douglas Thrift	178	<< date() << crlf << "Server: " << server() << crlf
83	Douglas Thrift	176	<< "Connection: close" << crlf;
84			}
85
86	Douglas Thrift	180	string Daemon::reason(Status status)
87			{
88			ostringstream sout;
89
90			switch (status)
91			{
92			case ok:
93			sout << "OK";
94			break;
95			case found:
96			sout << "Found";
97			break;
98			case seeOther:
99			sout << "See Other";
100			break;
101			case bad:
102			sout << "Bad Request";
103			break;
104			case notFound:
105			sout << "Not Found";
106			break;
107			case lengthRequired:
108			sout << "Length Required";
109			break;
110			case mediaType:
111			sout << "Unsupported Media Type";
112			break;
113			case serverError:
114			sout << "Internal Server Error";
115			break;
116			case notImplemented:
117			sout << "Not Implemented";
118			break;
119			case version:
120			sout << "HTTP Version not supported";
121			}
122
123			return sout.str();
124			}
125
126	Douglas Thrift	178	string Daemon::server()
127			{
128			utsname system;
129
130			uname(&system);
131
132			return string("Smersh/0.9 (") + system.sysname + ')';
133			}
134
135	Douglas Thrift	181	string Daemon::server(const Environment& env)
136	Douglas Thrift	176	{
137	Douglas Thrift	181	ostringstream server;
138			string port(env.get("SERVER_PORT"));
139
140			server << this->server() << " Server at " << env.get("SERVER_NAME") << " Po"
141			<< "rt " << (port.empty() ? lexical_cast<string>(this->port) : port);
142
143			return server.str();
144			}
145
146			streamsize Daemon::error(ostream& sout, Status status, const Environment& env)
147			{
148	Douglas Thrift	177	string reason(this->reason(status));
149			ostringstream error;
150
151			error << "<html><head><title>" << status << ' ' << reason << "</title></hea"
152			<< "d><body><h1>" << reason << "</h1><p>Mistakes were made, deal with t"
153	Douglas Thrift	181	<< "hem.</p><hr /><address>" << server(env) << "</address></body></html"
154			<< ">\r\n";
155	Douglas Thrift	177	sout << "Content-Length: " << error.str().length() << crlf
156			<< "Content-Type: text/html; charset=UTF-8\r\n\r\n" << error.str();
157
158			return error.str().size();
159	Douglas Thrift	175	}
160
161	Douglas Thrift	176	string Daemon::date(bool log)
162			{
163			time_t now(time(NULL));
164			tm time;
165
166			if (log) localtime_r(&now, &time); else gmtime_r(&now, &time);
167
168			const char* format(log ? "[%m/%d/%Y:%T %z]" : "%a, %d %b %Y %T GMT");
169			char when[log ? 29 : 30];
170
171			strftime(when, log ? 29 : 30, format, &time);
172
173			return when;
174			}
175
176	Douglas Thrift	179	int Daemon::handle(Client* client)
177	Douglas Thrift	177	{
178	Douglas Thrift	205	ios::ToIoStream sio(&client->socket, &client->socket);
179	Douglas Thrift	175	Environment env;
180			stringstream post;
181			ostringstream log;
182			Status code(request(sio, env, post, log));
183	Douglas Thrift	174
184	Douglas Thrift	180	if (env.get("REQUEST_URI") == "/favicon.ico") code = notFound;
185
186	Douglas Thrift	176	response(sio, code);
187	Douglas Thrift	174
188	Douglas Thrift	177	bool head(env.get("REQUEST_METHOD") == "HEAD");
189			streamsize sent(0);
190
191	Douglas Thrift	181	if (code == ok && env.get("REQUEST_URI") == "/robots.txt")
192	Douglas Thrift	176	{
193	Douglas Thrift	181	sio << "Content-Length: 28\r\nContent-Type: text/plain; charset=UTF-8\r"
194			<< "\n\r\n";
195
196			if (!head) { sio << "User-agent: *\r\nDisallow: /\r\n"; sent = 28; }
197			}
198			else if (code == ok && !head)
199			{
200	Douglas Thrift	180	ostringstream content;
201	Douglas Thrift	181	Smersh smersh(post, content, env);
202	Douglas Thrift	176
203	Douglas Thrift	182	sio << "Content-Length: " << content.str().length() << crlf
204	Douglas Thrift	177	<< "Content-Type: text/html; charset=UTF-8\r\n\r\n";
205	Douglas Thrift	176
206	Douglas Thrift	182	sio.write(content.str().data(), content.str().size());
207	Douglas Thrift	177
208	Douglas Thrift	182	sent = content.str().size();
209	Douglas Thrift	176	}
210	Douglas Thrift	177	else if (head) sio << "Content-Type: text/html; charset=UTF-8\r\n\r\n";
211	Douglas Thrift	181	else sent = error(sio, code, env);
212	Douglas Thrift	176
213	Douglas Thrift	177	ofstream fout(this->log.c_str(), ios_base::app);
214	Douglas Thrift	175
215	Douglas Thrift	179	fout << inet_ntoa(client->ip->sin_addr) << " - - " << date(true) << ' '
216	Douglas Thrift	180	<< log.str() << code << ' ' << lexical_cast<string>(sent) << " \""
217			<< env.get("HTTP_REFERER") << "\" \"" << env.get("HTTP_USER_AGENT")
218			<< "\"\n";
219	Douglas Thrift	178	sio << flush;
220	Douglas Thrift	177
221	Douglas Thrift	179	client->socket.ShutdownWrite();
222	Douglas Thrift	178
223	Douglas Thrift	174	delete client;
224	Douglas Thrift	164	}
225	Douglas Thrift	176
226			void Daemon::headers(istream& sin, Environment& env)
227			{
228			do
229			{
230			string line;
231
232			getline(sin, line);
233
234			if (line.empty()) break;
235
236			istringstream input(line);
237			string name, value;
238
239	Douglas Thrift	178	std::getline(input, name, ':');
240	Douglas Thrift	176	getline(input, value);
241
242			for (char next(sin.peek()); next == ' ' \|\| next == '\t'; next =
243			sin.peek())
244			{
245			getline(sin, line);
246
247			value += ' ' + line;
248			}
249
250			Matcher matcher("^\\s(.+)\\s$");
251
252			if (name == "Content-Length")
253			{
254			if (value == matcher) env.set("CONTENT_LENGTH", matcher[1]);
255			}
256			else if (name == "Content-Type")
257			{
258			if (value == matcher) env.set("CONTENT_TYPE", matcher[1]);
259			}
260	Douglas Thrift	181	else if (name == "Host")
261			{
262			Matcher matcher("^\\s(.+?)(:[0-9]+)?\\s$");
263
264			if (value == matcher)
265			{
266			bool port(matcher.size() > 2);
267
268			env.set("HTTP_HOST", matcher[1] + (port ? matcher[2] : ""));
269			env.set("SERVER_NAME", matcher[1]);
270
271			if (port) env.set("SERVER_PORT", matcher[2].substr(1));
272			}
273			}
274	Douglas Thrift	176	else if (name == "Referer")
275			{
276			if (value == matcher) env.set("HTTP_REFERER", matcher[1]);
277			}
278			else if (name == "User-Agent")
279			{
280			if (value == matcher) env.set("HTTP_USER_AGENT", matcher[1]);
281			}
282			}
283			while (sin.good());
284			}
285
286			Daemon::Status Daemon::message(istream& sin, Environment& env, ostream& post)
287			{
288			string contentLength(env.get("CONTENT_LENGTH"));
289	Douglas Thrift	177
290	Douglas Thrift	176	if (env.get("CONTENT_TYPE") != "application/x-www-form-urlencoded") return
291			mediaType;
292			if (contentLength.empty()) return lengthRequired;
293
294			streamsize length(lexical_cast<streamsize>(contentLength));
295			char* content(new char[length]);
296
297			sin.read(content, length);
298			post.write(content, length);
299
300			delete [] content;
301
302			return ok;
303			}