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	siliconforks	116	/*
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	siliconforks	125	if (s == INVALID_SOCKET) {
63	siliconforks	116	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			}