repos/Smersh/Daemon.cpp

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

#include <arpa/inet.h>
#include <sys/utsname.h>

#include "Daemon.hpp"

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

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

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

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

                        exit(1);
                case 0:
                        break;
                default:
                        return;
                }
        }

        server.Listen(50);

        while (true)
        {
                api::TcpSocket* client(new api::TcpSocket());

                server.Accept(*client);

                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[3]) > 1) return version;

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

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

                env.set("REQUEST_METHOD", method);

                if (!request[2].empty()) env.set("QUERY_STRING", request[2].substr(1));

                headers(sin, env);

                if (method[0] == "POST") return message(sin, env, post);

                return ok;
        }

        return notFound;
}

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::server()
{
        utsname system;

        uname(&system);

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

streamsize Daemon::error(ostream& sout, Status status)
{
        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() + "</address></body></html>\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;
}

string Daemon::ip(const api::TcpSocket& socket)
{
        api::InternetAddress address(socket.GetAddress());

        return inet_ntoa(address->sin_addr);
}

int Daemon::handle(api::TcpSocket* client)
{
        ios::InputOutputStreamBufAdapter adapter(*client);
        iostream sio(&adapter);
        Environment env;
        stringstream post;
        ostringstream log;
        Status code(request(sio, env, post, log));

        response(sio, code);

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

        if (code == ok && !head)
        {
                ostringstream output;
                Smersh smersh(post, output, env);
                string content(output.str().substr(40));

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

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

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

        log << code << ' ' << (sent > 0 ? lexical_cast<string>(sent) : string("0"))
                << " \"" << env.get("HTTP_REFERER") << "\" \""
                << env.get("HTTP_USER_AGENT") << '"';

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

        fout << ip(*client) << " - - " << date(true) << ' ' << log.str() << '\n';
        sio << flush;

        client->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 == "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;
}

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();
}
Revision:	178
Committed:	2004-06-29T13:15:51-07:00 (20 years, 11 months ago) by Douglas Thrift
File size:	5689 byte(s)
Log Message:	Works better, but dies.
#	User	Rev	Content
1	Douglas Thrift	164	// Smersh
2			//
3			// Douglas Thrift
4			//
5			// $Id$
6
7	Douglas Thrift	177	#include <arpa/inet.h>
8	Douglas Thrift	178	#include <sys/utsname.h>
9	Douglas Thrift	177
10	Douglas Thrift	164	#include "Daemon.hpp"
11
12	Douglas Thrift	175	string Daemon::crlf("\r\n");
13
14	Douglas Thrift	173	void Daemon::serve(int port, bool fork, Daemon* self)
15	Douglas Thrift	164	{
16	Douglas Thrift	174	api::TcpSocket server;
17	Douglas Thrift	172
18	Douglas Thrift	174	server.Create();
19			server.SetAddress(api::InternetAddress(api::InternetAddress::Any, port));
20
21	Douglas Thrift	172	if (fork)
22			{
23			switch (::fork())
24			{
25			case -1:
26			cerr << program << ": fork()\n";
27
28			exit(1);
29			case 0:
30			break;
31			default:
32			return;
33			}
34			}
35
36	Douglas Thrift	174	server.Listen(50);
37	Douglas Thrift	173
38			while (true)
39			{
40	Douglas Thrift	174	api::TcpSocket* client(new api::TcpSocket());
41	Douglas Thrift	173
42	Douglas Thrift	174	server.Accept(*client);
43
44			api::Thread thread(etl::BindAll(&Daemon::handle, self, client));
45	Douglas Thrift	173	}
46	Douglas Thrift	164	}
47
48	Douglas Thrift	175	Daemon::Status Daemon::request(istream& sin, Environment& env, ostream& post,
49			ostream& log)
50			{
51			string line;
52	Douglas Thrift	176	Matcher request("^([A-Z]+) .*?(\\?.+)? HTTP/(\\d+)\\.(\\d+)$");
53	Douglas Thrift	175
54			getline(sin, line);
55
56			log << '"' << line << "\" ";
57
58	Douglas Thrift	176	env.put("HTTP_REFERER=-");
59			env.put("HTTP_USER_AGENT=-");
60
61	Douglas Thrift	175	if (line == request)
62			{
63	Douglas Thrift	176	if (lexical_cast<unsigned>(request[3]) > 1) return version;
64	Douglas Thrift	175
65	Douglas Thrift	176	Matcher method("^GET\|HEAD\|POST$");
66	Douglas Thrift	175
67	Douglas Thrift	176	if (request[1] != method) return notImplemented;
68	Douglas Thrift	175
69	Douglas Thrift	176	env.set("REQUEST_METHOD", method);
70	Douglas Thrift	175
71	Douglas Thrift	176	if (!request[2].empty()) env.set("QUERY_STRING", request[2].substr(1));
72	Douglas Thrift	175
73	Douglas Thrift	176	headers(sin, env);
74	Douglas Thrift	175
75	Douglas Thrift	176	if (method[0] == "POST") return message(sin, env, post);
76	Douglas Thrift	175
77			return ok;
78			}
79
80			return notFound;
81			}
82
83	Douglas Thrift	176	void Daemon::response(ostream& sout, Status status)
84	Douglas Thrift	175	{
85	Douglas Thrift	177	sout << "HTTP/1.1 " << status << ' ' << reason(status) << crlf << "Date: "
86	Douglas Thrift	178	<< date() << crlf << "Server: " << server() << crlf
87	Douglas Thrift	176	<< "Connection: close" << crlf;
88			}
89
90	Douglas Thrift	178	string Daemon::server()
91			{
92			utsname system;
93
94			uname(&system);
95
96			return string("Smersh/0.9 (") + system.sysname + ')';
97			}
98
99	Douglas Thrift	177	streamsize Daemon::error(ostream& sout, Status status)
100	Douglas Thrift	176	{
101	Douglas Thrift	177	string reason(this->reason(status));
102			ostringstream error;
103
104			error << "<html><head><title>" << status << ' ' << reason << "</title></hea"
105			<< "d><body><h1>" << reason << "</h1><p>Mistakes were made, deal with t"
106	Douglas Thrift	178	<< "hem.</p><hr /><address>" << server() + "</address></body></html>\n";
107	Douglas Thrift	177	sout << "Content-Length: " << error.str().length() << crlf
108			<< "Content-Type: text/html; charset=UTF-8\r\n\r\n" << error.str();
109
110			return error.str().size();
111	Douglas Thrift	175	}
112
113	Douglas Thrift	176	string Daemon::date(bool log)
114			{
115			time_t now(time(NULL));
116			tm time;
117
118			if (log) localtime_r(&now, &time); else gmtime_r(&now, &time);
119
120			const char* format(log ? "[%m/%d/%Y:%T %z]" : "%a, %d %b %Y %T GMT");
121			char when[log ? 29 : 30];
122
123			strftime(when, log ? 29 : 30, format, &time);
124
125			return when;
126			}
127
128	Douglas Thrift	177	string Daemon::ip(const api::TcpSocket& socket)
129			{
130			api::InternetAddress address(socket.GetAddress());
131
132			return inet_ntoa(address->sin_addr);
133			}
134
135	Douglas Thrift	174	int Daemon::handle(api::TcpSocket* client)
136	Douglas Thrift	164	{
137	Douglas Thrift	174	ios::InputOutputStreamBufAdapter adapter(*client);
138	Douglas Thrift	175	iostream sio(&adapter);
139			Environment env;
140			stringstream post;
141			ostringstream log;
142			Status code(request(sio, env, post, log));
143	Douglas Thrift	174
144	Douglas Thrift	176	response(sio, code);
145	Douglas Thrift	174
146	Douglas Thrift	177	bool head(env.get("REQUEST_METHOD") == "HEAD");
147			streamsize sent(0);
148
149			if (code == ok && !head)
150	Douglas Thrift	176	{
151			ostringstream output;
152			Smersh smersh(post, output, env);
153			string content(output.str().substr(40));
154
155			sio << "Content-Length: " << content.length() << crlf
156	Douglas Thrift	177	<< "Content-Type: text/html; charset=UTF-8\r\n\r\n";
157	Douglas Thrift	176
158			sio.write(content.data(), content.size());
159	Douglas Thrift	177
160			sent = content.size();
161	Douglas Thrift	176	}
162	Douglas Thrift	177	else if (head) sio << "Content-Type: text/html; charset=UTF-8\r\n\r\n";
163			else sent = error(sio, code);
164	Douglas Thrift	176
165	Douglas Thrift	177	log << code << ' ' << (sent > 0 ? lexical_cast<string>(sent) : string("0"))
166			<< " \"" << env.get("HTTP_REFERER") << "\" \""
167	Douglas Thrift	175	<< env.get("HTTP_USER_AGENT") << '"';
168
169	Douglas Thrift	177	ofstream fout(this->log.c_str(), ios_base::app);
170	Douglas Thrift	175
171	Douglas Thrift	177	fout << ip(*client) << " - - " << date(true) << ' ' << log.str() << '\n';
172	Douglas Thrift	178	sio << flush;
173	Douglas Thrift	177
174	Douglas Thrift	178	client->ShutdownWrite();
175
176	Douglas Thrift	174	delete client;
177	Douglas Thrift	164	}
178	Douglas Thrift	176
179			void Daemon::headers(istream& sin, Environment& env)
180			{
181			do
182			{
183			string line;
184
185			getline(sin, line);
186
187			if (line.empty()) break;
188
189			istringstream input(line);
190			string name, value;
191
192	Douglas Thrift	178	std::getline(input, name, ':');
193	Douglas Thrift	176	getline(input, value);
194
195			for (char next(sin.peek()); next == ' ' \|\| next == '\t'; next =
196			sin.peek())
197			{
198			getline(sin, line);
199
200			value += ' ' + line;
201			}
202
203			Matcher matcher("^\\s(.+)\\s$");
204
205			if (name == "Content-Length")
206			{
207			if (value == matcher) env.set("CONTENT_LENGTH", matcher[1]);
208			}
209			else if (name == "Content-Type")
210			{
211			if (value == matcher) env.set("CONTENT_TYPE", matcher[1]);
212			}
213			else if (name == "Referer")
214			{
215			if (value == matcher) env.set("HTTP_REFERER", matcher[1]);
216			}
217			else if (name == "User-Agent")
218			{
219			if (value == matcher) env.set("HTTP_USER_AGENT", matcher[1]);
220			}
221			}
222			while (sin.good());
223			}
224
225			Daemon::Status Daemon::message(istream& sin, Environment& env, ostream& post)
226			{
227			string contentLength(env.get("CONTENT_LENGTH"));
228	Douglas Thrift	177
229	Douglas Thrift	176	if (env.get("CONTENT_TYPE") != "application/x-www-form-urlencoded") return
230			mediaType;
231			if (contentLength.empty()) return lengthRequired;
232
233			streamsize length(lexical_cast<streamsize>(contentLength));
234			char* content(new char[length]);
235
236			sin.read(content, length);
237			post.write(content, length);
238
239			delete [] content;
240
241			return ok;
242			}
243	Douglas Thrift	177
244			string Daemon::reason(Status status)
245			{
246			ostringstream sout;
247
248			switch (status)
249			{
250			case ok:
251			sout << "OK";
252			break;
253			case found:
254			sout << "Found";
255			break;
256			case seeOther:
257			sout << "See Other";
258			break;
259			case bad:
260			sout << "Bad Request";
261			break;
262			case notFound:
263			sout << "Not Found";
264			break;
265			case lengthRequired:
266			sout << "Length Required";
267			break;
268			case mediaType:
269			sout << "Unsupported Media Type";
270			break;
271			case serverError:
272			sout << "Internal Server Error";
273			break;
274			case notImplemented:
275			sout << "Not Implemented";
276			break;
277			case version:
278			sout << "HTTP Version not supported";
279			}
280
281			return sout.str();
282			}