1 #include <stdio.h>
2 #include <stdlib.h>
3 #include <ctype.h>
4 #define _GNU_SOURCE
5 #include <string.h>
6 #include <errno.h>
7 #include "http_parsing.h"
8 #include "tdate_parse.h"
9 
10 #define SPACE_OR_TAB(x)  ((x) == ' '  || (x) == '\t')
11 #define CR_OR_NEWLINE(x) ((x) == '\r' || (x) == '\n')
12 
13 /*---------------------------------------------------------------------------*/
14 int
15 find_http_header(char *data, int len)
16 {
17 	char *temp = data;
18 	int hdr_len = 0;
19 	char ch = data[len]; /* remember it */
20 
21 	/* null terminate the string first */
22 	data[len] = 0;
23 	while (!hdr_len && (temp = strchr(temp, '\n')) != NULL) {
24 		temp++;
25 		if (*temp == '\n')
26 			hdr_len = temp - data + 1;
27 		else if (len > 0 && *temp == '\r' && *(temp + 1) == '\n')
28 			hdr_len = temp - data + 2;
29 	}
30 	data[len] = ch; /* put it back */
31 
32 	/* terminate the header if found */
33 	if (hdr_len)
34 		data[hdr_len-1] = 0;
35 
36 	return hdr_len;
37 }
38 /*--------------------------------------------------------------------------*/
39 char *
40 http_header_str_val(const char* buf, const char *key, const int keylen,
41 		    char* value, int value_len)
42 {
43 	char *temp = (char *) buf;  /* temporarily de-const buf */
44 	int i = 0;
45 
46 	/* find the header field */
47 	while (*temp && (temp = strchr(temp, '\n'))) {
48 		temp++; /* advance to the next line */
49 		if (!strncasecmp(temp, key, keylen))
50 			break;
51 	}
52 	if (temp == NULL || *temp == '\0') {
53 		*value = 0;
54 		return NULL;
55 	}
56 
57 	/* skip whitespace or tab */
58 	temp += keylen;
59 	while (*temp && SPACE_OR_TAB(*temp))
60 		temp++;
61 
62 	/* if we reached the end of the line, forget it */
63 	if (*temp == '\0' || CR_OR_NEWLINE(*temp)) {
64 		*value = 0;
65 		return NULL;
66 	}
67 
68 	/* copy value data */
69 	while (*temp && !CR_OR_NEWLINE(*temp) && i < value_len-1)
70 		value[i++] = *temp++;
71 	value[i] = 0;
72 	return (i == 0) ? NULL : value;
73 }
74 /*---------------------------------------------------------------------------*/
75 long int
76 http_header_long_val(const char * response, const char* key, int key_len)
77 {
78 #define C_TYPE_LEN 50
79 	long int len;
80 	char value[C_TYPE_LEN];
81 	char *temp = http_header_str_val(response, key, key_len, value, C_TYPE_LEN);
82 
83 	if (temp == NULL)
84 		return -1;
85 
86 	len = strtol(temp, NULL, 10);
87 	if (errno == EINVAL || errno == ERANGE)
88 		return -1;
89 
90 	return len;
91 }
92 /*--------------------------------------------------------------------------*/
93 char*
94 http_get_url(char * data, int data_len, char* value, int value_len)
95 {
96 	char *ret = data;
97 	char *temp;
98 	int i = 0;
99 
100 	if (strncmp(data, HTTP_GET, sizeof(HTTP_GET)-1)) {
101 		*value = 0;
102 		return NULL;
103 	}
104 
105 	ret += sizeof(HTTP_GET);
106 	while (*ret && SPACE_OR_TAB(*ret))
107 		ret++;
108 
109 	temp = ret;
110 	while (*temp && *temp != ' ' && i < value_len - 1) {
111 		value[i++] = *temp++;
112 	}
113 	value[i] = 0;
114 
115 	return ret;
116 }
117 /*---------------------------------------------------------------------------*/
118 
119