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/**
* Copyright (C) 2011-2012 Juho Vähä-Herttua
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include "http_response.h"
#include "compat.h"
struct http_response_s {
int complete;
int disconnect;
char *data;
int data_size;
int data_length;
};
static void
http_response_add_data(http_response_t *response, const char *data, int datalen)
{
int newdatasize;
assert(response);
assert(data);
assert(datalen > 0);
newdatasize = response->data_size;
while (response->data_size+datalen > newdatasize) {
newdatasize *= 2;
}
if (newdatasize != response->data_size) {
response->data = realloc(response->data, newdatasize);
assert(response->data);
}
memcpy(response->data+response->data_length, data, datalen);
response->data_length += datalen;
}
http_response_t *
http_response_create()
{
http_response_t *response = (http_response_t *) calloc(1, sizeof(http_response_t));
if (!response) {
return NULL;
}
/* Allocate response data */
response->data_size = 1024;
response->data = (char *) malloc(response->data_size);
if (!response->data) {
free(response);
return NULL;
}
return response;
}
void
http_response_init(http_response_t *response, const char *protocol, int code, const char *message)
{
assert(response);
response->data_length = 0; /* can be used to reinitialize a previously-initialized response */
char codestr[4];
assert(code >= 100 && code < 1000);
/* Convert code into string */
memset(codestr, 0, sizeof(codestr));
snprintf(codestr, sizeof(codestr), "%u", code);
/* Add first line of response to the data array */
http_response_add_data(response, protocol, strlen(protocol));
http_response_add_data(response, " ", 1);
http_response_add_data(response, codestr, strlen(codestr));
http_response_add_data(response, " ", 1);
http_response_add_data(response, message, strlen(message));
http_response_add_data(response, "\r\n", 2);
}
void
http_response_reverse_request_init(http_response_t *request, const char *method, const char *url, const char *protocol)
{
assert(request);
request->data_length = 0; /* reinitialize a previously-initialized response as a reverse-HTTP (PTTH/1.0) request */
/* Add first line of response to the data array */
http_response_add_data(request, method, strlen(method));
http_response_add_data(request, " ", 1);
http_response_add_data(request, url, strlen(url));
http_response_add_data(request, " ", 1);
http_response_add_data(request, protocol, strlen(protocol));
http_response_add_data(request, "\r\n", 2);
}
void
http_response_destroy(http_response_t *response)
{
if (response) {
free(response->data);
free(response);
}
}
void
http_response_add_header(http_response_t *response, const char *name, const char *value)
{
assert(response);
assert(name);
assert(value);
http_response_add_data(response, name, strlen(name));
http_response_add_data(response, ": ", 2);
http_response_add_data(response, value, strlen(value));
http_response_add_data(response, "\r\n", 2);
}
void
http_response_finish(http_response_t *response, const char *data, int datalen)
{
assert(response);
assert(datalen==0 || (data && datalen > 0));
if (data && datalen > 0) {
const char *hdrname = "Content-Length";
char hdrvalue[16];
memset(hdrvalue, 0, sizeof(hdrvalue));
snprintf(hdrvalue, sizeof(hdrvalue)-1, "%d", datalen);
/* Add Content-Length header first */
http_response_add_data(response, hdrname, strlen(hdrname));
http_response_add_data(response, ": ", 2);
http_response_add_data(response, hdrvalue, strlen(hdrvalue));
http_response_add_data(response, "\r\n\r\n", 4);
/* Add data to the end of response */
http_response_add_data(response, data, datalen);
} else {
/* check for "Content-Type" header, with datalen = 0 */
const char *item = "Content-Type";
int item_len = strlen(item);
const char *part = response->data;
int end = response->data_length - item_len;
for (int i = 0; i < end; i++) {
if (memcmp (part, item, item_len) == 0) {
const char *hdrname = "Content-Length: 0";
http_response_add_data(response, hdrname, strlen(hdrname));
http_response_add_data(response, "\r\n", 2);
break;
}
part++;
}
/* Add extra end of line after headers */
http_response_add_data(response, "\r\n", 2);
}
response->complete = 1;
}
void
http_response_set_disconnect(http_response_t *response, int disconnect)
{
assert(response);
response->disconnect = !!disconnect;
}
int
http_response_get_disconnect(http_response_t *response)
{
assert(response);
return response->disconnect;
}
const char *
http_response_get_data(http_response_t *response, int *datalen)
{
assert(response);
assert(datalen);
assert(response->complete);
*datalen = response->data_length;
return response->data;
}
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