repos/Smersh/Daemon.cpp

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

#include "Daemon.hpp"

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

void Daemon::serve(Daemon* self)
{
        ext::StackReference<api::TcpSocket> server;

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

        return 0;
}

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:	253
Committed:	2004-09-13T23:31:24-07:00 (20 years, 9 months ago) by Douglas Thrift
File size:	6293 byte(s)
Log Message:	This is a bit futzy!?
#	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	253	void Daemon::serve(Daemon* self)
12	Douglas Thrift	164	{
13	Douglas Thrift	253	ext::StackReference<api::TcpSocket> server;
14	Douglas Thrift	172
15	Douglas Thrift	174	server.SetAddress(api::InternetAddress(api::InternetAddress::Any, port));
16			server.Listen(50);
17	Douglas Thrift	173
18			while (true)
19			{
20	Douglas Thrift	253	Client* client(new Client(server));
21	Douglas Thrift	174	api::Thread thread(etl::BindAll(&Daemon::handle, self, client));
22	Douglas Thrift	173	}
23	Douglas Thrift	164	}
24
25	Douglas Thrift	175	Daemon::Status Daemon::request(istream& sin, Environment& env, ostream& post,
26			ostream& log)
27			{
28			string line;
29	Douglas Thrift	180	Matcher request("^([A-Z]+) (.*?)(\\?.+)? HTTP/(\\d+)\\.(\\d+)$");
30	Douglas Thrift	175
31			getline(sin, line);
32
33			log << '"' << line << "\" ";
34
35	Douglas Thrift	176	env.put("HTTP_REFERER=-");
36			env.put("HTTP_USER_AGENT=-");
37
38	Douglas Thrift	175	if (line == request)
39			{
40	Douglas Thrift	180	if (lexical_cast<unsigned>(request[4]) > 1) return version;
41	Douglas Thrift	175
42	Douglas Thrift	176	Matcher method("^GET\|HEAD\|POST$");
43	Douglas Thrift	175
44	Douglas Thrift	176	if (request[1] != method) return notImplemented;
45	Douglas Thrift	175
46	Douglas Thrift	176	env.set("REQUEST_METHOD", method);
47	Douglas Thrift	180	env.set("REQUEST_URI", request[2] + request[3]);
48	Douglas Thrift	175
49	Douglas Thrift	180	if (!request[3].empty()) env.set("QUERY_STRING", request[3].substr(1));
50	Douglas Thrift	175
51	Douglas Thrift	176	headers(sin, env);
52	Douglas Thrift	175
53	Douglas Thrift	181	if (env.get("HTTP_HOST").empty()) return bad;
54	Douglas Thrift	176	if (method[0] == "POST") return message(sin, env, post);
55	Douglas Thrift	175
56			return ok;
57			}
58
59	Douglas Thrift	180	return bad;
60	Douglas Thrift	175	}
61
62	Douglas Thrift	176	void Daemon::response(ostream& sout, Status status)
63	Douglas Thrift	175	{
64	Douglas Thrift	177	sout << "HTTP/1.1 " << status << ' ' << reason(status) << crlf << "Date: "
65	Douglas Thrift	178	<< date() << crlf << "Server: " << server() << crlf
66	Douglas Thrift	176	<< "Connection: close" << crlf;
67			}
68
69	Douglas Thrift	180	string Daemon::reason(Status status)
70			{
71			ostringstream sout;
72
73			switch (status)
74			{
75			case ok:
76			sout << "OK";
77			break;
78			case found:
79			sout << "Found";
80			break;
81			case seeOther:
82			sout << "See Other";
83			break;
84			case bad:
85			sout << "Bad Request";
86			break;
87			case notFound:
88			sout << "Not Found";
89			break;
90			case lengthRequired:
91			sout << "Length Required";
92			break;
93			case mediaType:
94			sout << "Unsupported Media Type";
95			break;
96			case serverError:
97			sout << "Internal Server Error";
98			break;
99			case notImplemented:
100			sout << "Not Implemented";
101			break;
102			case version:
103			sout << "HTTP Version not supported";
104			}
105
106			return sout.str();
107			}
108
109	Douglas Thrift	178	string Daemon::server()
110			{
111			utsname system;
112
113			uname(&system);
114
115			return string("Smersh/0.9 (") + system.sysname + ')';
116			}
117
118	Douglas Thrift	181	string Daemon::server(const Environment& env)
119	Douglas Thrift	176	{
120	Douglas Thrift	181	ostringstream server;
121			string port(env.get("SERVER_PORT"));
122
123			server << this->server() << " Server at " << env.get("SERVER_NAME") << " Po"
124			<< "rt " << (port.empty() ? lexical_cast<string>(this->port) : port);
125
126			return server.str();
127			}
128
129			streamsize Daemon::error(ostream& sout, Status status, const Environment& env)
130			{
131	Douglas Thrift	177	string reason(this->reason(status));
132			ostringstream error;
133
134			error << "<html><head><title>" << status << ' ' << reason << "</title></hea"
135			<< "d><body><h1>" << reason << "</h1><p>Mistakes were made, deal with t"
136	Douglas Thrift	181	<< "hem.</p><hr /><address>" << server(env) << "</address></body></html"
137			<< ">\r\n";
138	Douglas Thrift	177	sout << "Content-Length: " << error.str().length() << crlf
139			<< "Content-Type: text/html; charset=UTF-8\r\n\r\n" << error.str();
140
141			return error.str().size();
142	Douglas Thrift	175	}
143
144	Douglas Thrift	176	string Daemon::date(bool log)
145			{
146			time_t now(time(NULL));
147			tm time;
148
149			if (log) localtime_r(&now, &time); else gmtime_r(&now, &time);
150
151			const char* format(log ? "[%m/%d/%Y:%T %z]" : "%a, %d %b %Y %T GMT");
152			char when[log ? 29 : 30];
153
154			strftime(when, log ? 29 : 30, format, &time);
155
156			return when;
157			}
158
159	Douglas Thrift	179	int Daemon::handle(Client* client)
160	Douglas Thrift	177	{
161	Douglas Thrift	205	ios::ToIoStream sio(&client->socket, &client->socket);
162	Douglas Thrift	175	Environment env;
163			stringstream post;
164			ostringstream log;
165			Status code(request(sio, env, post, log));
166	Douglas Thrift	174
167	Douglas Thrift	180	if (env.get("REQUEST_URI") == "/favicon.ico") code = notFound;
168
169	Douglas Thrift	176	response(sio, code);
170	Douglas Thrift	174
171	Douglas Thrift	177	bool head(env.get("REQUEST_METHOD") == "HEAD");
172			streamsize sent(0);
173
174	Douglas Thrift	181	if (code == ok && env.get("REQUEST_URI") == "/robots.txt")
175	Douglas Thrift	176	{
176	Douglas Thrift	181	sio << "Content-Length: 28\r\nContent-Type: text/plain; charset=UTF-8\r"
177			<< "\n\r\n";
178
179			if (!head) { sio << "User-agent: *\r\nDisallow: /\r\n"; sent = 28; }
180			}
181			else if (code == ok && !head)
182			{
183	Douglas Thrift	180	ostringstream content;
184	Douglas Thrift	181	Smersh smersh(post, content, env);
185	Douglas Thrift	176
186	Douglas Thrift	182	sio << "Content-Length: " << content.str().length() << crlf
187	Douglas Thrift	177	<< "Content-Type: text/html; charset=UTF-8\r\n\r\n";
188	Douglas Thrift	176
189	Douglas Thrift	182	sio.write(content.str().data(), content.str().size());
190	Douglas Thrift	177
191	Douglas Thrift	182	sent = content.str().size();
192	Douglas Thrift	176	}
193	Douglas Thrift	177	else if (head) sio << "Content-Type: text/html; charset=UTF-8\r\n\r\n";
194	Douglas Thrift	181	else sent = error(sio, code, env);
195	Douglas Thrift	176
196	Douglas Thrift	177	ofstream fout(this->log.c_str(), ios_base::app);
197	Douglas Thrift	175
198	Douglas Thrift	179	fout << inet_ntoa(client->ip->sin_addr) << " - - " << date(true) << ' '
199	Douglas Thrift	180	<< log.str() << code << ' ' << lexical_cast<string>(sent) << " \""
200			<< env.get("HTTP_REFERER") << "\" \"" << env.get("HTTP_USER_AGENT")
201			<< "\"\n";
202	Douglas Thrift	178	sio << flush;
203	Douglas Thrift	177
204	Douglas Thrift	179	client->socket.ShutdownWrite();
205	Douglas Thrift	178
206	Douglas Thrift	174	delete client;
207	Douglas Thrift	241
208			return 0;
209	Douglas Thrift	164	}
210	Douglas Thrift	176
211			void Daemon::headers(istream& sin, Environment& env)
212			{
213			do
214			{
215			string line;
216
217			getline(sin, line);
218
219			if (line.empty()) break;
220
221			istringstream input(line);
222			string name, value;
223
224	Douglas Thrift	178	std::getline(input, name, ':');
225	Douglas Thrift	176	getline(input, value);
226
227			for (char next(sin.peek()); next == ' ' \|\| next == '\t'; next =
228			sin.peek())
229			{
230			getline(sin, line);
231
232			value += ' ' + line;
233			}
234
235			Matcher matcher("^\\s(.+)\\s$");
236
237			if (name == "Content-Length")
238			{
239			if (value == matcher) env.set("CONTENT_LENGTH", matcher[1]);
240			}
241			else if (name == "Content-Type")
242			{
243			if (value == matcher) env.set("CONTENT_TYPE", matcher[1]);
244			}
245	Douglas Thrift	181	else if (name == "Host")
246			{
247			Matcher matcher("^\\s(.+?)(:[0-9]+)?\\s$");
248
249			if (value == matcher)
250			{
251			bool port(matcher.size() > 2);
252
253			env.set("HTTP_HOST", matcher[1] + (port ? matcher[2] : ""));
254			env.set("SERVER_NAME", matcher[1]);
255
256			if (port) env.set("SERVER_PORT", matcher[2].substr(1));
257			}
258			}
259	Douglas Thrift	176	else if (name == "Referer")
260			{
261			if (value == matcher) env.set("HTTP_REFERER", matcher[1]);
262			}
263			else if (name == "User-Agent")
264			{
265			if (value == matcher) env.set("HTTP_USER_AGENT", matcher[1]);
266			}
267			}
268			while (sin.good());
269			}
270
271			Daemon::Status Daemon::message(istream& sin, Environment& env, ostream& post)
272			{
273			string contentLength(env.get("CONTENT_LENGTH"));
274	Douglas Thrift	177
275	Douglas Thrift	176	if (env.get("CONTENT_TYPE") != "application/x-www-form-urlencoded") return
276			mediaType;
277			if (contentLength.empty()) return lengthRequired;
278
279			streamsize length(lexical_cast<streamsize>(contentLength));
280			char* content(new char[length]);
281
282			sin.read(content, length);
283			post.write(content, length);
284
285			delete [] content;
286
287			return ok;
288			}