/[jscoverage]/trunk/http-url.c
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Contents of /trunk/http-url.c

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Revision 254 - (show annotations)
Sun Oct 5 18:09:32 2008 UTC (10 years, 2 months ago) by siliconforks
File MIME type: text/plain
File size: 3509 byte(s)
Check for invalid octets in URL.
1 /*
2 http-url.c - URL parsing routines
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 <ctype.h>
25 #include <string.h>
26
27 #include "util.h"
28
29 int URL_parse_host_and_port(const char * s, char ** host, uint16_t * port) {
30 char * colon = strchr(s, ':');
31 if (colon == NULL) {
32 *host = xstrdup(s);
33 *port = 80;
34 }
35 else {
36 if (*(colon + 1) == '\0') {
37 *port = 80;
38 }
39 else {
40 char * end;
41 unsigned long p = strtoul(colon + 1, &end, 10);
42 if (*end == '\0') {
43 if (p > UINT16_MAX) {
44 return -1;
45 }
46 else {
47 *port = p;
48 }
49 }
50 else {
51 return -1;
52 }
53 }
54 *host = xstrndup(s, colon - s);
55 }
56 return 0;
57 }
58
59 int URL_parse_abs_path_and_query(const char * s, char ** abs_path, char ** query) {
60 if (*s == '\0') {
61 *abs_path = xstrdup("/");
62 *query = NULL;
63 }
64 else if (*s == '?') {
65 *abs_path = xstrdup("/");
66 *query = xstrdup(s + 1);
67 }
68 else if (*s == '/') {
69 char * question = strchr(s, '?');
70 if (question == NULL) {
71 *abs_path = xstrdup(s);
72 *query = NULL;
73 }
74 else {
75 *abs_path = xstrndup(s, question - s);
76 *query = xstrdup(question + 1);
77 }
78 }
79 else {
80 return -1;
81 }
82 return 0;
83 }
84
85 int URL_parse(const char * url, char ** host, uint16_t * port, char ** abs_path, char ** query) {
86 /* check for invalid characters */
87 for (const char * p = url; *p != '\0'; p++) {
88 switch (*p) {
89 case ';':
90 case '/':
91 case '?':
92 case ':':
93 case '@':
94 case '&':
95 case '=':
96 case '+':
97 case '$':
98 case ',':
99 case '-':
100 case '_':
101 case '.':
102 case '!':
103 case '~':
104 case '*':
105 case '\'':
106 case '(':
107 case ')':
108 case '%':
109 break;
110 default:
111 if (! isalnum(*p)) {
112 return -1;
113 }
114 break;
115 }
116 }
117
118 int result;
119 if (strncasecmp(url, "http://", 7) == 0) {
120 /* absoluteURI */
121
122 /* advance past the http:// */
123 const char * authority_start = url + 7;
124
125 /* look for a slash or question mark */
126 const char * p;
127 for (p = authority_start; *p != '/' && *p != '?' && *p != '\0'; p++) {
128 ;
129 }
130
131 char * host_and_port = xstrndup(authority_start, p - authority_start);
132 result = URL_parse_host_and_port(host_and_port, host, port);
133 free(host_and_port);
134 if (result != 0) {
135 return result;
136 }
137
138 result = URL_parse_abs_path_and_query(p, abs_path, query);
139 if (result != 0) {
140 free(*host);
141 *host = NULL;
142 return result;
143 }
144 }
145 else {
146 /* abs_path */
147 *host = NULL;
148 *port = 80;
149 result = URL_parse_abs_path_and_query(url, abs_path, query);
150 if (result != 0) {
151 return result;
152 }
153 }
154 result = 0;
155 return result;
156 }

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