jscoverage/trunk/http-server.c

/*
    http-server.c - generic HTTP server
    Copyright (C) 2008 siliconforks.com

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License along
    with this program; if not, write to the Free Software Foundation, Inc.,
    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/

#include <config.h>

#include "http-server.h"

#include <stdarg.h>
#include <string.h>

#include <arpa/inet.h>
#include <pthread.h>

#include "util.h"

#ifdef _WIN32
typedef void ThreadRoutineReturnType;
#define THREAD_ROUTINE_RETURN return
#else
typedef void * ThreadRoutineReturnType;
#define THREAD_ROUTINE_RETURN return NULL
#endif

struct HTTPServer {
  char * ip_address;
  uint16_t port;
  HTTPServerHandler handler;
  SOCKET s;
};

struct HTTPServerConnection {
  HTTPConnection * connection;
  struct HTTPServer * server;
};

static bool is_shutdown = false;
pthread_mutex_t shutdown_mutex = PTHREAD_MUTEX_INITIALIZER;

static ThreadRoutineReturnType handle_connection(void * p) {
  struct HTTPServerConnection * connection = p;
  uint16_t port = connection->server->port;

  HTTPExchange * exchange = HTTPExchange_new(connection->connection);
  if (HTTPExchange_read_request_headers(exchange) == 0) {
    connection->server->handler(exchange);
  }
  else {
    HTTPExchange_set_status_code(exchange, 400);
    const char * message = "Could not parse request headers\n";
    if (HTTPExchange_write_response(exchange, message, strlen(message)) != 0) {
      HTTPServer_log_err("Warning: error writing to client\n");
    }
  }
  if (HTTPExchange_flush_response(exchange) != 0) {
    HTTPServer_log_err("Warning: error writing to client\n");
  }
  HTTPExchange_delete(exchange);
  if (HTTPConnection_delete(connection->connection) != 0) {
    HTTPServer_log_err("Warning: error closing connection to client\n");
  }
  free(connection);

  /* HACK: make connection to server to force accept() to return */
  if (is_shutdown) {
    SOCKET s = socket(PF_INET, SOCK_STREAM, 0);
    if (s == -1) {
      HTTPServer_log_err("Warning: error creating socket\n");
    }
    else {
      struct sockaddr_in a;
      a.sin_family = AF_INET;
      a.sin_port = htons(port);
      a.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
      if (connect(s, (struct sockaddr *) &a, sizeof(a)) == -1) {
        HTTPServer_log_err("Warning: error connecting to server\n");
      }
      closesocket(s);
    }
  }

  THREAD_ROUTINE_RETURN;
}

static struct HTTPServer * HTTPServer_new(const char * ip_address, uint16_t port, HTTPServerHandler handler) {
  struct HTTPServer * result = xmalloc(sizeof(struct HTTPServer));
  if (ip_address == NULL) {
    result->ip_address = NULL;
  }
  else {
    result->ip_address = xstrdup(ip_address);
  }
  result->port = port;
  result->handler = handler;
  result->s = -1;
  return result;
}

static void HTTPServer_delete(struct HTTPServer * server) {
  free(server->ip_address);
  closesocket(server->s);
  free(server);
}

void HTTPServer_run(const char * ip_address, uint16_t port, HTTPServerHandler handler) {
  struct HTTPServer * server = HTTPServer_new(ip_address, port, handler);

#ifdef _WIN32
  WSADATA data;
  if (WSAStartup(MAKEWORD(1, 1), &data) != 0) {
    fatal("Could not start Winsock");
  }
#endif

  server->s = socket(PF_INET, SOCK_STREAM, 0);
  if (server->s == -1) {
    fatal("could not create socket");
  }

  /* http://hea-www.harvard.edu/~fine/Tech/addrinuse.html */
  int optval = 1;
  setsockopt(server->s, SOL_SOCKET, SO_REUSEADDR, (const char *) &optval, sizeof(optval));

  struct sockaddr_in a;
  a.sin_family = AF_INET;
  a.sin_port = htons(server->port);
  if (server->ip_address == NULL) {
    /*
    a.sin_addr.s_addr = htonl(INADDR_ANY);
    */
    a.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
  }
  else {
    if (inet_aton(server->ip_address, &(a.sin_addr)) == 0) {
      closesocket(server->s);
      fatal("invalid address: %s", server->ip_address);
    }
  }

  if (bind(server->s, (struct sockaddr *) &a, sizeof(a)) == -1) {
    closesocket(server->s);
    fatal("could not bind to address");
  }

  if (listen(server->s, 5) == -1) {
    closesocket(server->s);
    fatal("could not listen for connections");
  }

  for (;;) {
    struct sockaddr_in client_address;
    size_t client_address_size = sizeof(client_address);
    SOCKET s = accept(server->s, (struct sockaddr *) &client_address, &client_address_size);
    if (s == -1) {
      HTTPServer_log_err("Warning: could not accept client connection\n");
      continue;
    }

    if (is_shutdown) {
      closesocket(s);
      break;
    }

    struct HTTPServerConnection * connection = xmalloc(sizeof(struct HTTPServerConnection));
    connection->server = server;
    connection->connection = HTTPConnection_new_server(s);

#ifdef _WIN32
    unsigned long thread = _beginthread(handle_connection, 0, connection);
#else
    pthread_t thread;
    pthread_attr_t a;
    pthread_attr_init(&a);
    pthread_attr_setdetachstate(&a, PTHREAD_CREATE_DETACHED);
    pthread_create(&thread, &a, handle_connection, connection);
    pthread_attr_destroy(&a);
#endif
  }

  HTTPServer_delete(server);
}

void HTTPServer_shutdown(void) {
  pthread_mutex_lock(&shutdown_mutex);
  is_shutdown = true;
  pthread_mutex_unlock(&shutdown_mutex);
}

void HTTPServer_log_out(const char * format, ...) {
  va_list a;
  va_start(a, format);
  vfprintf(stdout, format, a);
  va_end(a);
}

void HTTPServer_log_err(const char * format, ...) {
  va_list a;
  va_start(a, format);
  vfprintf(stderr, format, a);
  va_end(a);
}
1	/*
2	http-server.c - generic HTTP server
3	Copyright (C) 2008 siliconforks.com
4
5	This program is free software; you can redistribute it and/or modify
6	it under the terms of the GNU General Public License as published by
7	the Free Software Foundation; either version 2 of the License, or
8	(at your option) any later version.
9
10	This program is distributed in the hope that it will be useful,
11	but WITHOUT ANY WARRANTY; without even the implied warranty of
12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13	GNU General Public License for more details.
14
15	You should have received a copy of the GNU General Public License along
16	with this program; if not, write to the Free Software Foundation, Inc.,
17	51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18	*/
19
20	#include <config.h>
21
22	#include "http-server.h"
23
24	#include <stdarg.h>
25	#include <string.h>
26
27	#include <arpa/inet.h>
28	#include <pthread.h>
29
30	#include "util.h"
31
32	#ifdef _WIN32
33	typedef void ThreadRoutineReturnType;
34	#define THREAD_ROUTINE_RETURN return
35	#else
36	typedef void * ThreadRoutineReturnType;
37	#define THREAD_ROUTINE_RETURN return NULL
38	#endif
39
40	struct HTTPServer {
41	char * ip_address;
42	uint16_t port;
43	HTTPServerHandler handler;
44	SOCKET s;
45	};
46
47	struct HTTPServerConnection {
48	HTTPConnection * connection;
49	struct HTTPServer * server;
50	};
51
52	static bool is_shutdown = false;
53	pthread_mutex_t shutdown_mutex = PTHREAD_MUTEX_INITIALIZER;
54
55	static ThreadRoutineReturnType handle_connection(void * p) {
56	struct HTTPServerConnection * connection = p;
57	uint16_t port = connection->server->port;
58
59	HTTPExchange * exchange = HTTPExchange_new(connection->connection);
60	if (HTTPExchange_read_request_headers(exchange) == 0) {
61	connection->server->handler(exchange);
62	}
63	else {
64	HTTPExchange_set_status_code(exchange, 400);
65	const char * message = "Could not parse request headers\n";
66	if (HTTPExchange_write_response(exchange, message, strlen(message)) != 0) {
67	HTTPServer_log_err("Warning: error writing to client\n");
68	}
69	}
70	if (HTTPExchange_flush_response(exchange) != 0) {
71	HTTPServer_log_err("Warning: error writing to client\n");
72	}
73	HTTPExchange_delete(exchange);
74	if (HTTPConnection_delete(connection->connection) != 0) {
75	HTTPServer_log_err("Warning: error closing connection to client\n");
76	}
77	free(connection);
78
79	/* HACK: make connection to server to force accept() to return */
80	if (is_shutdown) {
81	SOCKET s = socket(PF_INET, SOCK_STREAM, 0);
82	if (s == -1) {
83	HTTPServer_log_err("Warning: error creating socket\n");
84	}
85	else {
86	struct sockaddr_in a;
87	a.sin_family = AF_INET;
88	a.sin_port = htons(port);
89	a.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
90	if (connect(s, (struct sockaddr *) &a, sizeof(a)) == -1) {
91	HTTPServer_log_err("Warning: error connecting to server\n");
92	}
93	closesocket(s);
94	}
95	}
96
97	THREAD_ROUTINE_RETURN;
98	}
99
100	static struct HTTPServer * HTTPServer_new(const char * ip_address, uint16_t port, HTTPServerHandler handler) {
101	struct HTTPServer * result = xmalloc(sizeof(struct HTTPServer));
102	if (ip_address == NULL) {
103	result->ip_address = NULL;
104	}
105	else {
106	result->ip_address = xstrdup(ip_address);
107	}
108	result->port = port;
109	result->handler = handler;
110	result->s = -1;
111	return result;
112	}
113
114	static void HTTPServer_delete(struct HTTPServer * server) {
115	free(server->ip_address);
116	closesocket(server->s);
117	free(server);
118	}
119
120	void HTTPServer_run(const char * ip_address, uint16_t port, HTTPServerHandler handler) {
121	struct HTTPServer * server = HTTPServer_new(ip_address, port, handler);
122
123	#ifdef _WIN32
124	WSADATA data;
125	if (WSAStartup(MAKEWORD(1, 1), &data) != 0) {
126	fatal("Could not start Winsock");
127	}
128	#endif
129
130	server->s = socket(PF_INET, SOCK_STREAM, 0);
131	if (server->s == -1) {
132	fatal("could not create socket");
133	}
134
135	/* http://hea-www.harvard.edu/~fine/Tech/addrinuse.html */
136	int optval = 1;
137	setsockopt(server->s, SOL_SOCKET, SO_REUSEADDR, (const char *) &optval, sizeof(optval));
138
139	struct sockaddr_in a;
140	a.sin_family = AF_INET;
141	a.sin_port = htons(server->port);
142	if (server->ip_address == NULL) {
143	/*
144	a.sin_addr.s_addr = htonl(INADDR_ANY);
145	*/
146	a.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
147	}
148	else {
149	if (inet_aton(server->ip_address, &(a.sin_addr)) == 0) {
150	closesocket(server->s);
151	fatal("invalid address: %s", server->ip_address);
152	}
153	}
154
155	if (bind(server->s, (struct sockaddr *) &a, sizeof(a)) == -1) {
156	closesocket(server->s);
157	fatal("could not bind to address");
158	}
159
160	if (listen(server->s, 5) == -1) {
161	closesocket(server->s);
162	fatal("could not listen for connections");
163	}
164
165	for (;;) {
166	struct sockaddr_in client_address;
167	size_t client_address_size = sizeof(client_address);
168	SOCKET s = accept(server->s, (struct sockaddr *) &client_address, &client_address_size);
169	if (s == -1) {
170	HTTPServer_log_err("Warning: could not accept client connection\n");
171	continue;
172	}
173
174	if (is_shutdown) {
175	closesocket(s);
176	break;
177	}
178
179	struct HTTPServerConnection * connection = xmalloc(sizeof(struct HTTPServerConnection));
180	connection->server = server;
181	connection->connection = HTTPConnection_new_server(s);
182
183	#ifdef _WIN32
184	unsigned long thread = _beginthread(handle_connection, 0, connection);
185	#else
186	pthread_t thread;
187	pthread_attr_t a;
188	pthread_attr_init(&a);
189	pthread_attr_setdetachstate(&a, PTHREAD_CREATE_DETACHED);
190	pthread_create(&thread, &a, handle_connection, connection);
191	pthread_attr_destroy(&a);
192	#endif
193	}
194
195	HTTPServer_delete(server);
196	}
197
198	void HTTPServer_shutdown(void) {
199	pthread_mutex_lock(&shutdown_mutex);
200	is_shutdown = true;
201	pthread_mutex_unlock(&shutdown_mutex);
202	}
203
204	void HTTPServer_log_out(const char * format, ...) {
205	va_list a;
206	va_start(a, format);
207	vfprintf(stdout, format, a);
208	va_end(a);
209	}
210
211	void HTTPServer_log_err(const char * format, ...) {
212	va_list a;
213	va_start(a, format);
214	vfprintf(stderr, format, a);
215	va_end(a);
216	}