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[0]);
                env.set("REQUEST_URI", request[2] + request[3]);

                if (!request[3].IsEmpty()) env.set("QUERY_STRING", request[3].Substring(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].Substring(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:	349
Committed:	2004-12-16T18:15:34-08:00 (20 years, 6 months ago) by douglas
File size:	6304 byte(s)
Log Message:	Horribly broken, including parts of menes.
#	Content
1	// Smersh
2	//
3	// Douglas Thrift
4	//
5	// $Id$
6
7	#include "Daemon.hpp"
8
9	string Daemon::crlf("\r\n");
10
11	void Daemon::serve(Daemon* self)
12	{
13	ext::StackReference<api::TcpSocket> server;
14
15	server.SetAddress(api::InternetAddress(api::InternetAddress::Any, port));
16	server.Listen(50);
17
18	while (true)
19	{
20	Client* client(new Client(server));
21	api::Thread thread(etl::BindAll(&Daemon::handle, self, client));
22	}
23	}
24
25	Daemon::Status Daemon::request(istream& sin, Environment& env, ostream& post,
26	ostream& log)
27	{
28	string line;
29	Matcher request("^([A-Z]+) (.*?)(\\?.+)? HTTP/(\\d+)\\.(\\d+)$");
30
31	getline(sin, line);
32
33	log << '"' << line << "\" ";
34
35	env.put("HTTP_REFERER=-");
36	env.put("HTTP_USER_AGENT=-");
37
38	if (line == request)
39	{
40	if (lexical_cast<unsigned>(request[4]) > 1) return version;
41
42	Matcher method("^GET\|HEAD\|POST$");
43
44	if (request[1] != method) return notImplemented;
45
46	env.set("REQUEST_METHOD", method[0]);
47	env.set("REQUEST_URI", request[2] + request[3]);
48
49	if (!request[3].IsEmpty()) env.set("QUERY_STRING", request[3].Substring(1));
50
51	headers(sin, env);
52
53	if (env.get("HTTP_HOST").empty()) return bad;
54	if (method[0] == "POST") return message(sin, env, post);
55
56	return ok;
57	}
58
59	return bad;
60	}
61
62	void Daemon::response(ostream& sout, Status status)
63	{
64	sout << "HTTP/1.1 " << status << ' ' << reason(status) << crlf << "Date: "
65	<< date() << crlf << "Server: " << server() << crlf
66	<< "Connection: close" << crlf;
67	}
68
69	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	string Daemon::server()
110	{
111	utsname system;
112
113	uname(&system);
114
115	return string("Smersh/0.9 (") + system.sysname + ')';
116	}
117
118	string Daemon::server(const Environment& env)
119	{
120	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	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	<< "hem.</p><hr /><address>" << server(env) << "</address></body></html"
137	<< ">\r\n";
138	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	}
143
144	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	int Daemon::handle(Client* client)
160	{
161	ios::ToIoStream sio(&client->socket, &client->socket);
162	Environment env;
163	stringstream post;
164	ostringstream log;
165	Status code(request(sio, env, post, log));
166
167	if (env.get("REQUEST_URI") == "/favicon.ico") code = notFound;
168
169	response(sio, code);
170
171	bool head(env.get("REQUEST_METHOD") == "HEAD");
172	streamsize sent(0);
173
174	if (code == ok && env.get("REQUEST_URI") == "/robots.txt")
175	{
176	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	ostringstream content;
184	Smersh smersh(post, content, env);
185
186	sio << "Content-Length: " << content.str().length() << crlf
187	<< "Content-Type: text/html; charset=UTF-8\r\n\r\n";
188
189	sio.write(content.str().data(), content.str().size());
190
191	sent = content.str().size();
192	}
193	else if (head) sio << "Content-Type: text/html; charset=UTF-8\r\n\r\n";
194	else sent = error(sio, code, env);
195
196	ofstream fout(this->log.c_str(), ios_base::app);
197
198	fout << inet_ntoa(client->ip->sin_addr) << " - - " << date(true) << ' '
199	<< log.str() << code << ' ' << lexical_cast<string>(sent) << " \""
200	<< env.get("HTTP_REFERER") << "\" \"" << env.get("HTTP_USER_AGENT")
201	<< "\"\n";
202	sio << flush;
203
204	client->socket.ShutdownWrite();
205
206	delete client;
207
208	return 0;
209	}
210
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	std::getline(input, name, ':');
225	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$");
236
237	if (name == "Content-Length")
238	{
239	if (value == matcher) env.set("CONTENT_LENGTH", matcher[1]);
240	}
241	else if (name == "Content-Type")
242	{
243	if (value == matcher) env.set("CONTENT_TYPE", matcher[1]);
244	}
245	else if (name == "Host")
246	{
247	Matcher matcher("^\\s(.+?)(:[0-9]+)?\\s$");
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].Substring(1));
257	}
258	}
259	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
275	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	}