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/* |
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http-url.c - URL parsing routines |
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Copyright (C) 2008, 2009 siliconforks.com |
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|
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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|
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License along |
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with this program; if not, write to the Free Software Foundation, Inc., |
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
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*/ |
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|
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#include <config.h> |
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|
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#include "http-server.h" |
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|
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#include <ctype.h> |
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#include <string.h> |
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|
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#include "util.h" |
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|
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int URL_parse_host_and_port(const char * s, char ** host, uint16_t * port) { |
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char * colon = strchr(s, ':'); |
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if (colon == NULL) { |
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*host = xstrdup(s); |
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*port = 80; |
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} |
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else { |
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if (*(colon + 1) == '\0') { |
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*port = 80; |
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} |
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else { |
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char * end; |
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unsigned long p = strtoul(colon + 1, &end, 10); |
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if (*end == '\0') { |
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if (p > UINT16_MAX) { |
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return -1; |
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} |
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else { |
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*port = p; |
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} |
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} |
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else { |
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return -1; |
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} |
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} |
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*host = xstrndup(s, colon - s); |
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} |
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return 0; |
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} |
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|
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int URL_parse_abs_path_and_query(const char * s, char ** abs_path, char ** query) { |
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if (*s == '\0') { |
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*abs_path = xstrdup("/"); |
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*query = NULL; |
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} |
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else if (*s == '?') { |
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*abs_path = xstrdup("/"); |
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*query = xstrdup(s + 1); |
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} |
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else if (*s == '/') { |
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char * question = strchr(s, '?'); |
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if (question == NULL) { |
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*abs_path = xstrdup(s); |
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*query = NULL; |
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} |
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else { |
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*abs_path = xstrndup(s, question - s); |
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*query = xstrdup(question + 1); |
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} |
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} |
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else { |
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return -1; |
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} |
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return 0; |
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} |
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|
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int URL_parse(const char * url, char ** host, uint16_t * port, char ** abs_path, char ** query) { |
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/* check for invalid characters */ |
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for (const char * p = url; *p != '\0'; p++) { |
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if (*p <= 32 || *p >= 127) { |
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return -1; |
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} |
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} |
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|
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int result; |
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if (strncasecmp(url, "http://", 7) == 0) { |
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/* absoluteURI */ |
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|
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/* advance past the http:// */ |
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const char * authority_start = url + 7; |
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|
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/* look for a slash or question mark */ |
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const char * p; |
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for (p = authority_start; *p != '/' && *p != '?' && *p != '\0'; p++) { |
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; |
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} |
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|
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char * host_and_port = xstrndup(authority_start, p - authority_start); |
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result = URL_parse_host_and_port(host_and_port, host, port); |
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free(host_and_port); |
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if (result != 0) { |
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return result; |
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} |
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|
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result = URL_parse_abs_path_and_query(p, abs_path, query); |
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if (result != 0) { |
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free(*host); |
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*host = NULL; |
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return result; |
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} |
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} |
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else { |
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/* abs_path */ |
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*host = NULL; |
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*port = 80; |
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result = URL_parse_abs_path_and_query(url, abs_path, query); |
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if (result != 0) { |
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return result; |
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} |
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} |
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result = 0; |
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return result; |
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} |
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