jscoverage/trunk/http-connection.c

/*
    http-connection.c - TCP connection between HTTP client and 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 <assert.h>
#include <errno.h>
#include <string.h>

#include "util.h"

#define CONNECTION_BUFFER_CAPACITY 8192

struct HTTPConnection {
  SOCKET s;
  uint8_t input_buffer[CONNECTION_BUFFER_CAPACITY];
  size_t input_buffer_offset;
  size_t input_buffer_length;
  uint8_t output_buffer[CONNECTION_BUFFER_CAPACITY];
  size_t output_buffer_offset;
  size_t output_buffer_length;
};

static HTTPConnection * HTTPConnection_new(SOCKET s) {
  HTTPConnection * connection = xmalloc(sizeof(HTTPConnection));
  connection->s = s;
  connection->input_buffer_offset = 0;
  connection->input_buffer_length = 0;
  connection->output_buffer_offset = 0;
  connection->output_buffer_length = 0;
  return connection;
}

HTTPConnection * HTTPConnection_new_client(const char * host, uint16_t port) {
  struct in_addr ip_address;
  if (! inet_aton(host, &ip_address)) {
    /* it's a host name */
    if (xgethostbyname(host, &ip_address) != 0) {
      return NULL;
    }
  }

  SOCKET s = socket(PF_INET, SOCK_STREAM, 0);
  if (s == INVALID_SOCKET) {
    return NULL;
  }

  struct sockaddr_in a;
  a.sin_family = AF_INET;
  a.sin_port = htons(port);
  a.sin_addr = ip_address;

  if (connect(s, (struct sockaddr *) &a, sizeof(a)) < 0) {
    closesocket(s);
    return NULL;
  }

  return HTTPConnection_new(s);
}

HTTPConnection * HTTPConnection_new_server(SOCKET s) {
  return HTTPConnection_new(s);
}

int HTTPConnection_delete(HTTPConnection * connection) {
  int result = 0;
  if (closesocket(connection->s) == -1) {
    result = errno;
  }
  free(connection);
  return result;
}

int HTTPConnection_get_peer(HTTPConnection * connection, struct sockaddr_in * peer) {
  int result = 0;
  socklen_t length = sizeof(struct sockaddr_in);
  if (getpeername(connection->s, (struct sockaddr *) peer, &length) == -1) {
    result = errno;
  }
  return result;
}

int HTTPConnection_read_octet(HTTPConnection * connection, int * octet) {
  if (connection->input_buffer_offset >= connection->input_buffer_length) {
    ssize_t bytes_received = recv(connection->s, connection->input_buffer, CONNECTION_BUFFER_CAPACITY, 0);
    if (bytes_received == -1) {
      return errno;
    }
    else if (bytes_received == 0) {
      /* orderly shutdown */
      *octet = -1;
      return 0;
    }
    else {
      connection->input_buffer_offset = 0;
      connection->input_buffer_length = bytes_received;
    }
  }
  *octet = connection->input_buffer[connection->input_buffer_offset];
  connection->input_buffer_offset++;
  return 0;
}

int HTTPConnection_peek_octet(HTTPConnection * connection, int * octet) {
  int result = HTTPConnection_read_octet(connection, octet);

  /* check for error */
  if (result != 0) {
    return result;
  }

  /* check for end */
  if (*octet == -1) {
    return 0;
  }

  /* reset input buffer */
  connection->input_buffer_offset--;
  return 0;
}

int HTTPConnection_write(HTTPConnection * connection, const void * p, size_t size) {
  while (size > 0) {
    if (connection->output_buffer_length == CONNECTION_BUFFER_CAPACITY) {
      /* buffer full */
      ssize_t bytes_sent = send(connection->s, connection->output_buffer, CONNECTION_BUFFER_CAPACITY, 0);
      if (bytes_sent == -1) {
        return errno;
      }
      connection->output_buffer_length = 0;
    }

    size_t buffer_remaining = CONNECTION_BUFFER_CAPACITY - connection->output_buffer_length;
    size_t bytes_to_copy;
    if (size <= buffer_remaining) {
      bytes_to_copy = size;
    }
    else {
      bytes_to_copy = buffer_remaining;
    }

    memcpy(connection->output_buffer + connection->output_buffer_length, p, bytes_to_copy);
    connection->output_buffer_length += bytes_to_copy;
    p += bytes_to_copy;
    size -= bytes_to_copy;
  }

  return 0;
}

int HTTPConnection_flush(HTTPConnection * connection) {
  if (connection->output_buffer_length > 0) {
    ssize_t bytes_sent = send(connection->s, connection->output_buffer, connection->output_buffer_length, 0);
    if (bytes_sent == -1) {
      return errno;
    }
    connection->output_buffer_length = 0;
  }
  return 0;
}
1	/*
2	http-connection.c - TCP connection between HTTP client and 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 <assert.h>
25	#include <errno.h>
26	#include <string.h>
27
28	#include "util.h"
29
30	#define CONNECTION_BUFFER_CAPACITY 8192
31
32	struct HTTPConnection {
33	SOCKET s;
34	uint8_t input_buffer[CONNECTION_BUFFER_CAPACITY];
35	size_t input_buffer_offset;
36	size_t input_buffer_length;
37	uint8_t output_buffer[CONNECTION_BUFFER_CAPACITY];
38	size_t output_buffer_offset;
39	size_t output_buffer_length;
40	};
41
42	static HTTPConnection * HTTPConnection_new(SOCKET s) {
43	HTTPConnection * connection = xmalloc(sizeof(HTTPConnection));
44	connection->s = s;
45	connection->input_buffer_offset = 0;
46	connection->input_buffer_length = 0;
47	connection->output_buffer_offset = 0;
48	connection->output_buffer_length = 0;
49	return connection;
50	}
51
52	HTTPConnection * HTTPConnection_new_client(const char * host, uint16_t port) {
53	struct in_addr ip_address;
54	if (! inet_aton(host, &ip_address)) {
55	/* it's a host name */
56	if (xgethostbyname(host, &ip_address) != 0) {
57	return NULL;
58	}
59	}
60
61	SOCKET s = socket(PF_INET, SOCK_STREAM, 0);
62	if (s == INVALID_SOCKET) {
63	return NULL;
64	}
65
66	struct sockaddr_in a;
67	a.sin_family = AF_INET;
68	a.sin_port = htons(port);
69	a.sin_addr = ip_address;
70
71	if (connect(s, (struct sockaddr *) &a, sizeof(a)) < 0) {
72	closesocket(s);
73	return NULL;
74	}
75
76	return HTTPConnection_new(s);
77	}
78
79	HTTPConnection * HTTPConnection_new_server(SOCKET s) {
80	return HTTPConnection_new(s);
81	}
82
83	int HTTPConnection_delete(HTTPConnection * connection) {
84	int result = 0;
85	if (closesocket(connection->s) == -1) {
86	result = errno;
87	}
88	free(connection);
89	return result;
90	}
91
92	int HTTPConnection_get_peer(HTTPConnection * connection, struct sockaddr_in * peer) {
93	int result = 0;
94	socklen_t length = sizeof(struct sockaddr_in);
95	if (getpeername(connection->s, (struct sockaddr *) peer, &length) == -1) {
96	result = errno;
97	}
98	return result;
99	}
100
101	int HTTPConnection_read_octet(HTTPConnection * connection, int * octet) {
102	if (connection->input_buffer_offset >= connection->input_buffer_length) {
103	ssize_t bytes_received = recv(connection->s, connection->input_buffer, CONNECTION_BUFFER_CAPACITY, 0);
104	if (bytes_received == -1) {
105	return errno;
106	}
107	else if (bytes_received == 0) {
108	/* orderly shutdown */
109	*octet = -1;
110	return 0;
111	}
112	else {
113	connection->input_buffer_offset = 0;
114	connection->input_buffer_length = bytes_received;
115	}
116	}
117	*octet = connection->input_buffer[connection->input_buffer_offset];
118	connection->input_buffer_offset++;
119	return 0;
120	}
121
122	int HTTPConnection_peek_octet(HTTPConnection * connection, int * octet) {
123	int result = HTTPConnection_read_octet(connection, octet);
124
125	/* check for error */
126	if (result != 0) {
127	return result;
128	}
129
130	/* check for end */
131	if (*octet == -1) {
132	return 0;
133	}
134
135	/* reset input buffer */
136	connection->input_buffer_offset--;
137	return 0;
138	}
139
140	int HTTPConnection_write(HTTPConnection * connection, const void * p, size_t size) {
141	while (size > 0) {
142	if (connection->output_buffer_length == CONNECTION_BUFFER_CAPACITY) {
143	/* buffer full */
144	ssize_t bytes_sent = send(connection->s, connection->output_buffer, CONNECTION_BUFFER_CAPACITY, 0);
145	if (bytes_sent == -1) {
146	return errno;
147	}
148	connection->output_buffer_length = 0;
149	}
150
151	size_t buffer_remaining = CONNECTION_BUFFER_CAPACITY - connection->output_buffer_length;
152	size_t bytes_to_copy;
153	if (size <= buffer_remaining) {
154	bytes_to_copy = size;
155	}
156	else {
157	bytes_to_copy = buffer_remaining;
158	}
159
160	memcpy(connection->output_buffer + connection->output_buffer_length, p, bytes_to_copy);
161	connection->output_buffer_length += bytes_to_copy;
162	p += bytes_to_copy;
163	size -= bytes_to_copy;
164	}
165
166	return 0;
167	}
168
169	int HTTPConnection_flush(HTTPConnection * connection) {
170	if (connection->output_buffer_length > 0) {
171	ssize_t bytes_sent = send(connection->s, connection->output_buffer, connection->output_buffer_length, 0);
172	if (bytes_sent == -1) {
173	return errno;
174	}
175	connection->output_buffer_length = 0;
176	}
177	return 0;
178	}