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23e7e3ae JVH |
1 | /** |
2 | * Copyright (C) 2011-2012 Juho Vähä-Herttua | |
3 | * | |
4 | * This library is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU Lesser General Public | |
6 | * License as published by the Free Software Foundation; either | |
7 | * version 2.1 of the License, or (at your option) any later version. | |
8 | * | |
9 | * This library is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | * Lesser General Public License for more details. | |
13 | */ | |
14 | ||
2340bcd3 JVH |
15 | #include <stdlib.h> |
16 | #include <stdio.h> | |
17 | #include <string.h> | |
18 | #include <assert.h> | |
19 | ||
20 | #include "http_response.h" | |
21 | ||
22 | struct http_response_s { | |
23 | int complete; | |
24 | ||
25 | char *data; | |
26 | int data_size; | |
27 | int data_length; | |
28 | }; | |
29 | ||
30 | ||
31 | static void | |
32 | http_response_add_data(http_response_t *response, const char *data, int datalen) | |
33 | { | |
34 | int newdatasize; | |
35 | ||
36 | assert(response); | |
37 | assert(data); | |
38 | assert(datalen > 0); | |
39 | ||
40 | newdatasize = response->data_size; | |
41 | while (response->data_size+datalen > newdatasize) { | |
42 | newdatasize *= 2; | |
43 | } | |
44 | if (newdatasize != response->data_size) { | |
45 | response->data = realloc(response->data, newdatasize); | |
46 | assert(response->data); | |
47 | } | |
48 | memcpy(response->data+response->data_length, data, datalen); | |
49 | response->data_length += datalen; | |
50 | } | |
51 | ||
52 | http_response_t * | |
53 | http_response_init(const char *protocol, int code, const char *message) | |
54 | { | |
55 | http_response_t *response; | |
56 | char codestr[4]; | |
57 | ||
58 | assert(code >= 100 && code < 1000); | |
59 | ||
60 | /* Convert code into string */ | |
61 | memset(codestr, 0, sizeof(codestr)); | |
62 | snprintf(codestr, sizeof(codestr), "%u", code); | |
63 | ||
64 | response = calloc(1, sizeof(http_response_t)); | |
65 | if (!response) { | |
66 | return NULL; | |
67 | } | |
68 | ||
69 | /* Allocate response data */ | |
70 | response->data_size = 1024; | |
71 | response->data = malloc(response->data_size); | |
72 | if (!response->data) { | |
73 | free(response); | |
74 | return NULL; | |
75 | } | |
76 | ||
77 | /* Add first line of response to the data array */ | |
78 | http_response_add_data(response, protocol, strlen(protocol)); | |
79 | http_response_add_data(response, " ", 1); | |
80 | http_response_add_data(response, codestr, strlen(codestr)); | |
81 | http_response_add_data(response, " ", 1); | |
82 | http_response_add_data(response, message, strlen(message)); | |
83 | http_response_add_data(response, "\r\n", 2); | |
84 | ||
85 | return response; | |
86 | } | |
87 | ||
88 | void | |
89 | http_response_destroy(http_response_t *response) | |
90 | { | |
91 | if (response) { | |
92 | free(response->data); | |
93 | free(response); | |
94 | } | |
95 | } | |
96 | ||
97 | void | |
98 | http_response_add_header(http_response_t *response, const char *name, const char *value) | |
99 | { | |
100 | assert(response); | |
101 | assert(name); | |
102 | assert(value); | |
103 | ||
104 | http_response_add_data(response, name, strlen(name)); | |
105 | http_response_add_data(response, ": ", 2); | |
106 | http_response_add_data(response, value, strlen(value)); | |
107 | http_response_add_data(response, "\r\n", 2); | |
108 | } | |
109 | ||
110 | void | |
111 | http_response_finish(http_response_t *response, const char *data, int datalen) | |
112 | { | |
113 | assert(response); | |
114 | assert(datalen==0 || (data && datalen > 0)); | |
115 | ||
116 | if (data && datalen > 0) { | |
117 | const char *hdrname = "Content-Length"; | |
118 | char hdrvalue[16]; | |
119 | ||
120 | memset(hdrvalue, 0, sizeof(hdrvalue)); | |
121 | snprintf(hdrvalue, sizeof(hdrvalue)-1, "%d", datalen); | |
122 | ||
123 | /* Add Content-Length header first */ | |
124 | http_response_add_data(response, hdrname, strlen(hdrname)); | |
125 | http_response_add_data(response, ": ", 2); | |
126 | http_response_add_data(response, hdrvalue, strlen(hdrvalue)); | |
127 | http_response_add_data(response, "\r\n\r\n", 4); | |
128 | ||
129 | /* Add data to the end of response */ | |
130 | http_response_add_data(response, data, datalen); | |
131 | } else { | |
132 | /* Add extra end of line after headers */ | |
133 | http_response_add_data(response, "\r\n", 2); | |
134 | } | |
135 | response->complete = 1; | |
136 | } | |
137 | ||
138 | const char * | |
139 | http_response_get_data(http_response_t *response, int *datalen) | |
140 | { | |
141 | assert(response); | |
142 | assert(datalen); | |
143 | assert(response->complete); | |
144 | ||
145 | *datalen = response->data_length; | |
146 | return response->data; | |
147 | } |