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|
/*
+----------------------------------------------------------------------+
| PHP Version 5 |
+----------------------------------------------------------------------+
| Copyright (c) 1997-2012 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Author: Jim Winstead <jimw@php.net> |
+----------------------------------------------------------------------+
*/
/* $Id: url.c 321634 2012-01-01 13:15:04Z felipe $ */
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <sys/types.h>
#include "php.h"
#include "url.h"
#include "file.h"
#ifdef _OSD_POSIX
#ifndef APACHE
#error On this EBCDIC platform, PHP is only supported as an Apache module.
#else /*APACHE*/
#ifndef CHARSET_EBCDIC
#define CHARSET_EBCDIC /* this machine uses EBCDIC, not ASCII! */
#endif
#include "ebcdic.h"
#endif /*APACHE*/
#endif /*_OSD_POSIX*/
/* {{{ free_url
*/
PHPAPI void php_url_free(php_url *theurl)
{
if (theurl->scheme)
efree(theurl->scheme);
if (theurl->user)
efree(theurl->user);
if (theurl->pass)
efree(theurl->pass);
if (theurl->host)
efree(theurl->host);
if (theurl->path)
efree(theurl->path);
if (theurl->query)
efree(theurl->query);
if (theurl->fragment)
efree(theurl->fragment);
efree(theurl);
}
/* }}} */
/* {{{ php_replace_controlchars
*/
PHPAPI char *php_replace_controlchars_ex(char *str, int len)
{
unsigned char *s = (unsigned char *)str;
unsigned char *e = (unsigned char *)str + len;
if (!str) {
return (NULL);
}
while (s < e) {
if (iscntrl(*s)) {
*s='_';
}
s++;
}
return (str);
}
/* }}} */
PHPAPI char *php_replace_controlchars(char *str)
{
return php_replace_controlchars_ex(str, strlen(str));
}
PHPAPI php_url *php_url_parse(char const *str)
{
return php_url_parse_ex(str, strlen(str));
}
/* {{{ php_url_parse
*/
PHPAPI php_url *php_url_parse_ex(char const *str, int length)
{
char port_buf[6];
php_url *ret = ecalloc(1, sizeof(php_url));
char const *s, *e, *p, *pp, *ue;
s = str;
ue = s + length;
/* parse scheme */
if ((e = memchr(s, ':', length)) && (e - s)) {
/* validate scheme */
p = s;
while (p < e) {
/* scheme = 1*[ lowalpha | digit | "+" | "-" | "." ] */
if (!isalpha(*p) && !isdigit(*p) && *p != '+' && *p != '.' && *p != '-') {
if (e + 1 < ue) {
goto parse_port;
} else {
goto just_path;
}
}
p++;
}
if (*(e + 1) == '\0') { /* only scheme is available */
ret->scheme = estrndup(s, (e - s));
php_replace_controlchars_ex(ret->scheme, (e - s));
goto end;
}
/*
* certain schemas like mailto: and zlib: may not have any / after them
* this check ensures we support those.
*/
if (*(e+1) != '/') {
/* check if the data we get is a port this allows us to
* correctly parse things like a.com:80
*/
p = e + 1;
while (isdigit(*p)) {
p++;
}
if ((*p == '\0' || *p == '/') && (p - e) < 7) {
goto parse_port;
}
ret->scheme = estrndup(s, (e-s));
php_replace_controlchars_ex(ret->scheme, (e - s));
length -= ++e - s;
s = e;
goto just_path;
} else {
ret->scheme = estrndup(s, (e-s));
php_replace_controlchars_ex(ret->scheme, (e - s));
if (*(e+2) == '/') {
s = e + 3;
if (!strncasecmp("file", ret->scheme, sizeof("file"))) {
if (*(e + 3) == '/') {
/* support windows drive letters as in:
file:///c:/somedir/file.txt
*/
if (*(e + 5) == ':') {
s = e + 4;
}
goto nohost;
}
}
} else {
if (!strncasecmp("file", ret->scheme, sizeof("file"))) {
s = e + 1;
goto nohost;
} else {
length -= ++e - s;
s = e;
goto just_path;
}
}
}
} else if (e) { /* no scheme; starts with colon: look for port */
parse_port:
p = e + 1;
pp = p;
while (pp-p < 6 && isdigit(*pp)) {
pp++;
}
if (pp - p > 0 && pp - p < 6 && (*pp == '/' || *pp == '\0')) {
long port;
memcpy(port_buf, p, (pp - p));
port_buf[pp - p] = '\0';
port = strtol(port_buf, NULL, 10);
if (port > 0 && port <= 65535) {
ret->port = (unsigned short) port;
} else {
STR_FREE(ret->scheme);
efree(ret);
return NULL;
}
} else if (p == pp && *pp == '\0') {
STR_FREE(ret->scheme);
efree(ret);
return NULL;
} else {
goto just_path;
}
} else {
just_path:
ue = s + length;
goto nohost;
}
e = ue;
if (!(p = memchr(s, '/', (ue - s)))) {
char *query, *fragment;
query = memchr(s, '?', (ue - s));
fragment = memchr(s, '#', (ue - s));
if (query && fragment) {
if (query > fragment) {
p = e = fragment;
} else {
p = e = query;
}
} else if (query) {
p = e = query;
} else if (fragment) {
p = e = fragment;
}
} else {
e = p;
}
/* check for login and password */
if ((p = zend_memrchr(s, '@', (e-s)))) {
if ((pp = memchr(s, ':', (p-s)))) {
if ((pp-s) > 0) {
ret->user = estrndup(s, (pp-s));
php_replace_controlchars_ex(ret->user, (pp - s));
}
pp++;
if (p-pp > 0) {
ret->pass = estrndup(pp, (p-pp));
php_replace_controlchars_ex(ret->pass, (p-pp));
}
} else {
ret->user = estrndup(s, (p-s));
php_replace_controlchars_ex(ret->user, (p-s));
}
s = p + 1;
}
/* check for port */
if (*s == '[' && *(e-1) == ']') {
/* Short circuit portscan,
we're dealing with an
IPv6 embedded address */
p = s;
} else {
/* memrchr is a GNU specific extension
Emulate for wide compatability */
for(p = e; *p != ':' && p >= s; p--);
}
if (p >= s && *p == ':') {
if (!ret->port) {
p++;
if (e-p > 5) { /* port cannot be longer then 5 characters */
STR_FREE(ret->scheme);
STR_FREE(ret->user);
STR_FREE(ret->pass);
efree(ret);
return NULL;
} else if (e - p > 0) {
long port;
memcpy(port_buf, p, (e - p));
port_buf[e - p] = '\0';
port = strtol(port_buf, NULL, 10);
if (port > 0 && port <= 65535) {
ret->port = (unsigned short)port;
} else {
STR_FREE(ret->scheme);
STR_FREE(ret->user);
STR_FREE(ret->pass);
efree(ret);
return NULL;
}
}
p--;
}
} else {
p = e;
}
/* check if we have a valid host, if we don't reject the string as url */
if ((p-s) < 1) {
STR_FREE(ret->scheme);
STR_FREE(ret->user);
STR_FREE(ret->pass);
efree(ret);
return NULL;
}
ret->host = estrndup(s, (p-s));
php_replace_controlchars_ex(ret->host, (p - s));
if (e == ue) {
return ret;
}
s = e;
nohost:
if ((p = memchr(s, '?', (ue - s)))) {
pp = strchr(s, '#');
if (pp && pp < p) {
if (pp - s) {
ret->path = estrndup(s, (pp-s));
php_replace_controlchars_ex(ret->path, (pp - s));
}
p = pp;
goto label_parse;
}
if (p - s) {
ret->path = estrndup(s, (p-s));
php_replace_controlchars_ex(ret->path, (p - s));
}
if (pp) {
if (pp - ++p) {
ret->query = estrndup(p, (pp-p));
php_replace_controlchars_ex(ret->query, (pp - p));
}
p = pp;
goto label_parse;
} else if (++p - ue) {
ret->query = estrndup(p, (ue-p));
php_replace_controlchars_ex(ret->query, (ue - p));
}
} else if ((p = memchr(s, '#', (ue - s)))) {
if (p - s) {
ret->path = estrndup(s, (p-s));
php_replace_controlchars_ex(ret->path, (p - s));
}
label_parse:
p++;
if (ue - p) {
ret->fragment = estrndup(p, (ue-p));
php_replace_controlchars_ex(ret->fragment, (ue - p));
}
} else {
ret->path = estrndup(s, (ue-s));
php_replace_controlchars_ex(ret->path, (ue - s));
}
end:
return ret;
}
/* }}} */
/* {{{ proto mixed parse_url(string url, [int url_component])
Parse a URL and return its components */
PHP_FUNCTION(parse_url)
{
char *str;
int str_len;
php_url *resource;
long key = -1;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|l", &str, &str_len, &key) == FAILURE) {
return;
}
resource = php_url_parse_ex(str, str_len);
if (resource == NULL) {
/* @todo Find a method to determine why php_url_parse_ex() failed */
RETURN_FALSE;
}
if (key > -1) {
switch (key) {
case PHP_URL_SCHEME:
if (resource->scheme != NULL) RETVAL_STRING(resource->scheme, 1);
break;
case PHP_URL_HOST:
if (resource->host != NULL) RETVAL_STRING(resource->host, 1);
break;
case PHP_URL_PORT:
if (resource->port != 0) RETVAL_LONG(resource->port);
break;
case PHP_URL_USER:
if (resource->user != NULL) RETVAL_STRING(resource->user, 1);
break;
case PHP_URL_PASS:
if (resource->pass != NULL) RETVAL_STRING(resource->pass, 1);
break;
case PHP_URL_PATH:
if (resource->path != NULL) RETVAL_STRING(resource->path, 1);
break;
case PHP_URL_QUERY:
if (resource->query != NULL) RETVAL_STRING(resource->query, 1);
break;
case PHP_URL_FRAGMENT:
if (resource->fragment != NULL) RETVAL_STRING(resource->fragment, 1);
break;
default:
php_error_docref(NULL TSRMLS_CC, E_WARNING, "Invalid URL component identifier %ld", key);
RETVAL_FALSE;
}
goto done;
}
/* allocate an array for return */
array_init(return_value);
/* add the various elements to the array */
if (resource->scheme != NULL)
add_assoc_string(return_value, "scheme", resource->scheme, 1);
if (resource->host != NULL)
add_assoc_string(return_value, "host", resource->host, 1);
if (resource->port != 0)
add_assoc_long(return_value, "port", resource->port);
if (resource->user != NULL)
add_assoc_string(return_value, "user", resource->user, 1);
if (resource->pass != NULL)
add_assoc_string(return_value, "pass", resource->pass, 1);
if (resource->path != NULL)
add_assoc_string(return_value, "path", resource->path, 1);
if (resource->query != NULL)
add_assoc_string(return_value, "query", resource->query, 1);
if (resource->fragment != NULL)
add_assoc_string(return_value, "fragment", resource->fragment, 1);
done:
php_url_free(resource);
}
/* }}} */
/* {{{ php_htoi
*/
static int php_htoi(char *s)
{
int value;
int c;
c = ((unsigned char *)s)[0];
if (isupper(c))
c = tolower(c);
value = (c >= '0' && c <= '9' ? c - '0' : c - 'a' + 10) * 16;
c = ((unsigned char *)s)[1];
if (isupper(c))
c = tolower(c);
value += c >= '0' && c <= '9' ? c - '0' : c - 'a' + 10;
return (value);
}
/* }}} */
/* rfc1738:
...The characters ";",
"/", "?", ":", "@", "=" and "&" are the characters which may be
reserved for special meaning within a scheme...
...Thus, only alphanumerics, the special characters "$-_.+!*'(),", and
reserved characters used for their reserved purposes may be used
unencoded within a URL...
For added safety, we only leave -_. unencoded.
*/
static unsigned char hexchars[] = "0123456789ABCDEF";
/* {{{ php_url_encode
*/
PHPAPI char *php_url_encode(char const *s, int len, int *new_length)
{
register unsigned char c;
unsigned char *to, *start;
unsigned char const *from, *end;
from = (unsigned char *)s;
end = (unsigned char *)s + len;
start = to = (unsigned char *) safe_emalloc(3, len, 1);
while (from < end) {
c = *from++;
if (c == ' ') {
*to++ = '+';
#ifndef CHARSET_EBCDIC
} else if ((c < '0' && c != '-' && c != '.') ||
(c < 'A' && c > '9') ||
(c > 'Z' && c < 'a' && c != '_') ||
(c > 'z')) {
to[0] = '%';
to[1] = hexchars[c >> 4];
to[2] = hexchars[c & 15];
to += 3;
#else /*CHARSET_EBCDIC*/
} else if (!isalnum(c) && strchr("_-.", c) == NULL) {
/* Allow only alphanumeric chars and '_', '-', '.'; escape the rest */
to[0] = '%';
to[1] = hexchars[os_toascii[c] >> 4];
to[2] = hexchars[os_toascii[c] & 15];
to += 3;
#endif /*CHARSET_EBCDIC*/
} else {
*to++ = c;
}
}
*to = 0;
if (new_length) {
*new_length = to - start;
}
return (char *) start;
}
/* }}} */
/* {{{ proto string urlencode(string str)
URL-encodes string */
PHP_FUNCTION(urlencode)
{
char *in_str, *out_str;
int in_str_len, out_str_len;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &in_str,
&in_str_len) == FAILURE) {
return;
}
out_str = php_url_encode(in_str, in_str_len, &out_str_len);
RETURN_STRINGL(out_str, out_str_len, 0);
}
/* }}} */
/* {{{ proto string urldecode(string str)
Decodes URL-encoded string */
PHP_FUNCTION(urldecode)
{
char *in_str, *out_str;
int in_str_len, out_str_len;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &in_str,
&in_str_len) == FAILURE) {
return;
}
out_str = estrndup(in_str, in_str_len);
out_str_len = php_url_decode(out_str, in_str_len);
RETURN_STRINGL(out_str, out_str_len, 0);
}
/* }}} */
/* {{{ php_url_decode
*/
PHPAPI int php_url_decode(char *str, int len)
{
char *dest = str;
char *data = str;
while (len--) {
if (*data == '+') {
*dest = ' ';
}
else if (*data == '%' && len >= 2 && isxdigit((int) *(data + 1))
&& isxdigit((int) *(data + 2))) {
#ifndef CHARSET_EBCDIC
*dest = (char) php_htoi(data + 1);
#else
*dest = os_toebcdic[(char) php_htoi(data + 1)];
#endif
data += 2;
len -= 2;
} else {
*dest = *data;
}
data++;
dest++;
}
*dest = '\0';
return dest - str;
}
/* }}} */
/* {{{ php_raw_url_encode
*/
PHPAPI char *php_raw_url_encode(char const *s, int len, int *new_length)
{
register int x, y;
unsigned char *str;
str = (unsigned char *) safe_emalloc(3, len, 1);
for (x = 0, y = 0; len--; x++, y++) {
str[y] = (unsigned char) s[x];
#ifndef CHARSET_EBCDIC
if ((str[y] < '0' && str[y] != '-' && str[y] != '.') ||
(str[y] < 'A' && str[y] > '9') ||
(str[y] > 'Z' && str[y] < 'a' && str[y] != '_') ||
(str[y] > 'z' && str[y] != '~')) {
str[y++] = '%';
str[y++] = hexchars[(unsigned char) s[x] >> 4];
str[y] = hexchars[(unsigned char) s[x] & 15];
#else /*CHARSET_EBCDIC*/
if (!isalnum(str[y]) && strchr("_-.~", str[y]) != NULL) {
str[y++] = '%';
str[y++] = hexchars[os_toascii[(unsigned char) s[x]] >> 4];
str[y] = hexchars[os_toascii[(unsigned char) s[x]] & 15];
#endif /*CHARSET_EBCDIC*/
}
}
str[y] = '\0';
if (new_length) {
*new_length = y;
}
return ((char *) str);
}
/* }}} */
/* {{{ proto string rawurlencode(string str)
URL-encodes string */
PHP_FUNCTION(rawurlencode)
{
char *in_str, *out_str;
int in_str_len, out_str_len;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &in_str,
&in_str_len) == FAILURE) {
return;
}
out_str = php_raw_url_encode(in_str, in_str_len, &out_str_len);
RETURN_STRINGL(out_str, out_str_len, 0);
}
/* }}} */
/* {{{ proto string rawurldecode(string str)
Decodes URL-encodes string */
PHP_FUNCTION(rawurldecode)
{
char *in_str, *out_str;
int in_str_len, out_str_len;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &in_str,
&in_str_len) == FAILURE) {
return;
}
out_str = estrndup(in_str, in_str_len);
out_str_len = php_raw_url_decode(out_str, in_str_len);
RETURN_STRINGL(out_str, out_str_len, 0);
}
/* }}} */
/* {{{ php_raw_url_decode
*/
PHPAPI int php_raw_url_decode(char *str, int len)
{
char *dest = str;
char *data = str;
while (len--) {
if (*data == '%' && len >= 2 && isxdigit((int) *(data + 1))
&& isxdigit((int) *(data + 2))) {
#ifndef CHARSET_EBCDIC
*dest = (char) php_htoi(data + 1);
#else
*dest = os_toebcdic[(char) php_htoi(data + 1)];
#endif
data += 2;
len -= 2;
} else {
*dest = *data;
}
data++;
dest++;
}
*dest = '\0';
return dest - str;
}
/* }}} */
/* {{{ proto array get_headers(string url[, int format])
fetches all the headers sent by the server in response to a HTTP request */
PHP_FUNCTION(get_headers)
{
char *url;
int url_len;
php_stream_context *context;
php_stream *stream;
zval **prev_val, **hdr = NULL, **h;
HashPosition pos;
HashTable *hashT;
long format = 0;
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s|l", &url, &url_len, &format) == FAILURE) {
return;
}
context = FG(default_context) ? FG(default_context) : (FG(default_context) = php_stream_context_alloc());
if (!(stream = php_stream_open_wrapper_ex(url, "r", REPORT_ERRORS | STREAM_USE_URL | STREAM_ONLY_GET_HEADERS, NULL, context))) {
RETURN_FALSE;
}
if (!stream->wrapperdata || Z_TYPE_P(stream->wrapperdata) != IS_ARRAY) {
php_stream_close(stream);
RETURN_FALSE;
}
array_init(return_value);
/* check for curl-wrappers that provide headers via a special "headers" element */
if (zend_hash_find(HASH_OF(stream->wrapperdata), "headers", sizeof("headers"), (void **)&h) != FAILURE && Z_TYPE_PP(h) == IS_ARRAY) {
/* curl-wrappers don't load data until the 1st read */
if (!Z_ARRVAL_PP(h)->nNumOfElements) {
php_stream_getc(stream);
}
zend_hash_find(HASH_OF(stream->wrapperdata), "headers", sizeof("headers"), (void **)&h);
hashT = Z_ARRVAL_PP(h);
} else {
hashT = HASH_OF(stream->wrapperdata);
}
zend_hash_internal_pointer_reset_ex(hashT, &pos);
while (zend_hash_get_current_data_ex(hashT, (void**)&hdr, &pos) != FAILURE) {
if (!hdr || Z_TYPE_PP(hdr) != IS_STRING) {
zend_hash_move_forward_ex(hashT, &pos);
continue;
}
if (!format) {
no_name_header:
add_next_index_stringl(return_value, Z_STRVAL_PP(hdr), Z_STRLEN_PP(hdr), 1);
} else {
char c;
char *s, *p;
if ((p = strchr(Z_STRVAL_PP(hdr), ':'))) {
c = *p;
*p = '\0';
s = p + 1;
while (isspace((int)*(unsigned char *)s)) {
s++;
}
if (zend_hash_find(HASH_OF(return_value), Z_STRVAL_PP(hdr), (p - Z_STRVAL_PP(hdr) + 1), (void **) &prev_val) == FAILURE) {
add_assoc_stringl_ex(return_value, Z_STRVAL_PP(hdr), (p - Z_STRVAL_PP(hdr) + 1), s, (Z_STRLEN_PP(hdr) - (s - Z_STRVAL_PP(hdr))), 1);
} else { /* some headers may occur more then once, therefor we need to remake the string into an array */
convert_to_array(*prev_val);
add_next_index_stringl(*prev_val, s, (Z_STRLEN_PP(hdr) - (s - Z_STRVAL_PP(hdr))), 1);
}
*p = c;
} else {
goto no_name_header;
}
}
zend_hash_move_forward_ex(hashT, &pos);
}
php_stream_close(stream);
}
/* }}} */
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* End:
* vim600: sw=4 ts=4 fdm=marker
* vim<600: sw=4 ts=4
*/
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