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mpv/stream/url.c

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/*
* URL Helper
*
* Copyright (C) 2001 Bertrand Baudet <bertrand_baudet@yahoo.com>
*
* This file is part of MPlayer.
*
* MPlayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* MPlayer is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <stdarg.h>
#include <inttypes.h>
#include "url.h"
#include "core/mp_msg.h"
#ifndef SIZE_MAX
#define SIZE_MAX ((size_t)-1)
#endif
static char *mp_asprintf(const char *fmt, ...)
{
char *p = NULL;
va_list va, va_bak;
int len;
va_start(va, fmt);
va_copy(va_bak, va);
len = vsnprintf(NULL, 0, fmt, va);
if (len < 0)
goto end;
p = malloc(len + 1);
if (!p)
goto end;
len = vsnprintf(p, len + 1, fmt, va_bak);
if (len < 0)
free(p), p = NULL;
end:
va_end(va);
return p;
}
static int is_proxy(const URL_t *url) {
return !strcasecmp(url->protocol, "http_proxy") && url->file && strstr(url->file, "://");
}
int url_is_protocol(const URL_t *url, const char *proto) {
int proxy = is_proxy(url);
if (proxy) {
URL_t *tmp = url_new(url->file + 1);
int res = !strcasecmp(tmp->protocol, proto);
url_free(tmp);
return res;
}
return !strcasecmp(url->protocol, proto);
}
void url_set_protocol(URL_t *url, const char *proto) {
int proxy = is_proxy(url);
if (proxy) {
char *dst = url->file + 1;
int oldlen = strstr(dst, "://") - dst;
int newlen = strlen(proto);
if (newlen != oldlen) {
mp_msg(MSGT_NETWORK, MSGL_ERR, "Setting protocol not implemented!\n");
return;
}
memcpy(dst, proto, newlen);
return;
}
free(url->protocol);
url->protocol = strdup(proto);
}
URL_t *url_redirect(URL_t **url, const char *redir) {
URL_t *u = *url;
int proxy = is_proxy(u);
const char *oldurl = proxy ? u->file + 1 : u->url;
const char *newurl = redir;
char *buffer = NULL;
URL_t *res;
if (!strchr(redir, '/') || *redir == '/') {
char *tmp;
newurl = buffer = malloc(strlen(oldurl) + strlen(redir) + 1);
strcpy(buffer, oldurl);
if (*redir == '/') {
redir++;
tmp = strstr(buffer, "://");
if (tmp) tmp = strchr(tmp + 3, '/');
} else
tmp = strrchr(buffer, '/');
if (tmp) tmp[1] = 0;
strcat(buffer, redir);
}
if (proxy) {
char *tmp = get_http_proxy_url(u, newurl);
free(buffer);
newurl = buffer = tmp;
}
res = url_new(newurl);
free(buffer);
url_free(u);
*url = res;
return res;
}
static char *get_noauth_url(const URL_t *url)
{
if (url->port)
return mp_asprintf("%s://%s:%d%s",
url->protocol, url->hostname, url->port, url->file);
else
return mp_asprintf("%s://%s%s",
url->protocol, url->hostname, url->file);
}
char *get_http_proxy_url(const URL_t *proxy, const char *host_url)
{
if (proxy->username)
return mp_asprintf("http_proxy://%s:%s@%s:%d/%s",
proxy->username,
proxy->password ? proxy->password : "",
proxy->hostname, proxy->port, host_url);
else
return mp_asprintf("http_proxy://%s:%d/%s",
proxy->hostname, proxy->port, host_url);
}
URL_t*
url_new(const char* url) {
int pos1, pos2,v6addr = 0;
URL_t* Curl = NULL;
char *escfilename=NULL;
char *ptr1=NULL, *ptr2=NULL, *ptr3=NULL, *ptr4=NULL;
int jumpSize = 3;
if( url==NULL ) return NULL;
if (strlen(url) > (SIZE_MAX / 3 - 1)) {
mp_tmsg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed.\n");
goto err_out;
}
escfilename=malloc(strlen(url)*3+1);
if (!escfilename ) {
mp_tmsg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed.\n");
goto err_out;
}
// Create the URL container
Curl = calloc(1, sizeof(*Curl));
if( Curl==NULL ) {
mp_tmsg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed.\n");
goto err_out;
}
url_escape_string(escfilename,url);
// Copy the url in the URL container
Curl->url = strdup(escfilename);
if( Curl->url==NULL ) {
mp_tmsg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed.\n");
goto err_out;
}
mp_msg(MSGT_OPEN,MSGL_V,"Filename for url is now %s\n",escfilename);
// extract the protocol
ptr1 = strstr(escfilename, "://");
if( ptr1==NULL ) {
// Check for a special case: "sip:" (without "//"):
if (strstr(escfilename, "sip:") == escfilename) {
ptr1 = (char *)&url[3]; // points to ':'
jumpSize = 1;
} else {
mp_msg(MSGT_NETWORK,MSGL_V,"Not an URL!\n");
goto err_out;
}
}
pos1 = ptr1-escfilename;
Curl->protocol = malloc(pos1+1);
if( Curl->protocol==NULL ) {
mp_tmsg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed.\n");
goto err_out;
}
strncpy(Curl->protocol, escfilename, pos1);
Curl->protocol[pos1] = '\0';
// jump the "://"
ptr1 += jumpSize;
pos1 += jumpSize;
// check if a username:password is given
ptr2 = strstr(ptr1, "@");
ptr3 = strstr(ptr1, "/");
if( ptr3!=NULL && ptr3<ptr2 ) {
// it isn't really a username but rather a part of the path
ptr2 = NULL;
}
if( ptr2!=NULL ) {
// We got something, at least a username...
int len = ptr2-ptr1;
Curl->username = malloc(len+1);
if( Curl->username==NULL ) {
mp_tmsg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed.\n");
goto err_out;
}
strncpy(Curl->username, ptr1, len);
Curl->username[len] = '\0';
ptr3 = strstr(ptr1, ":");
if( ptr3!=NULL && ptr3<ptr2 ) {
// We also have a password
int len2 = ptr2-ptr3-1;
Curl->username[ptr3-ptr1]='\0';
Curl->password = malloc(len2+1);
if( Curl->password==NULL ) {
mp_tmsg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed.\n");
goto err_out;
}
strncpy( Curl->password, ptr3+1, len2);
Curl->password[len2]='\0';
url_unescape_string(Curl->password, Curl->password);
}
url_unescape_string(Curl->username, Curl->username);
ptr1 = ptr2+1;
pos1 = ptr1-escfilename;
}
// before looking for a port number check if we have an IPv6 type numeric address
// in IPv6 URL the numeric address should be inside square braces.
ptr2 = strstr(ptr1, "[");
ptr3 = strstr(ptr1, "]");
ptr4 = strstr(ptr1, "/");
if( ptr2!=NULL && ptr3!=NULL && ptr2 < ptr3 && (!ptr4 || ptr4 > ptr3)) {
// we have an IPv6 numeric address
ptr1++;
pos1++;
ptr2 = ptr3;
v6addr = 1;
} else {
ptr2 = ptr1;
}
// look if the port is given
ptr2 = strstr(ptr2, ":");
// If the : is after the first / it isn't the port
ptr3 = strstr(ptr1, "/");
if(ptr3 && ptr3 - ptr2 < 0) ptr2 = NULL;
if( ptr2==NULL ) {
// No port is given
// Look if a path is given
if( ptr3==NULL ) {
// No path/filename
// So we have an URL like http://www.hostname.com
pos2 = strlen(escfilename);
} else {
// We have an URL like http://www.hostname.com/file.txt
pos2 = ptr3-escfilename;
}
} else {
// We have an URL beginning like http://www.hostname.com:1212
// Get the port number
Curl->port = atoi(ptr2+1);
pos2 = ptr2-escfilename;
}
if( v6addr ) pos2--;
// copy the hostname in the URL container
Curl->hostname = malloc(pos2-pos1+1);
if( Curl->hostname==NULL ) {
mp_tmsg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed.\n");
goto err_out;
}
strncpy(Curl->hostname, ptr1, pos2-pos1);
Curl->hostname[pos2-pos1] = '\0';
// Look if a path is given
ptr2 = strstr(ptr1, "/");
if( ptr2!=NULL ) {
// A path/filename is given
// check if it's not a trailing '/'
if( strlen(ptr2)>1 ) {
// copy the path/filename in the URL container
Curl->file = strdup(ptr2);
if( Curl->file==NULL ) {
mp_tmsg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed.\n");
goto err_out;
}
}
}
// Check if a filename was given or set, else set it with '/'
if( Curl->file==NULL ) {
Curl->file = malloc(2);
if( Curl->file==NULL ) {
mp_tmsg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed.\n");
goto err_out;
}
strcpy(Curl->file, "/");
}
Curl->noauth_url = get_noauth_url(Curl);
if (!Curl->noauth_url) {
mp_msg(MSGT_NETWORK, MSGL_FATAL, "Memory allocation failed.\n");
goto err_out;
}
free(escfilename);
return Curl;
err_out:
free(escfilename);
if (Curl) url_free(Curl);
return NULL;
}
void
url_free(URL_t* url) {
if(!url) return;
free(url->url);
free(url->protocol);
free(url->hostname);
free(url->file);
free(url->username);
free(url->password);
free(url);
}
/* Replace escape sequences in an URL (or a part of an URL) */
/* works like strcpy(), but without return argument,
except that outbuf == inbuf is allowed */
void
url_unescape_string(char *outbuf, const char *inbuf)
{
unsigned char c,c1,c2;
int i,len=strlen(inbuf);
for (i=0;i<len;i++){
c = inbuf[i];
if (c == '%' && i<len-2) { //must have 2 more chars
c1 = toupper(inbuf[i+1]); // we need uppercase characters
c2 = toupper(inbuf[i+2]);
if ( ((c1>='0' && c1<='9') || (c1>='A' && c1<='F')) &&
((c2>='0' && c2<='9') || (c2>='A' && c2<='F')) ) {
if (c1>='0' && c1<='9') c1-='0';
else c1-='A'-10;
if (c2>='0' && c2<='9') c2-='0';
else c2-='A'-10;
c = (c1<<4) + c2;
i=i+2; //only skip next 2 chars if valid esc
}
}
*outbuf++ = c;
}
*outbuf++='\0'; //add nullterm to string
}
static void
url_escape_string_part(char *outbuf, const char *inbuf) {
unsigned char c,c1,c2;
int i,len=strlen(inbuf);
for (i=0;i<len;i++) {
c = inbuf[i];
if ((c=='%') && i<len-2 ) { //need 2 more characters
c1=toupper(inbuf[i+1]); c2=toupper(inbuf[i+2]); // need uppercase chars
} else {
c1=129; c2=129; //not escape chars
}
if( (c >= 'A' && c <= 'Z') ||
(c >= 'a' && c <= 'z') ||
(c >= '0' && c <= '9')) {
*outbuf++ = c;
} else if ( c=='%' && ((c1 >= '0' && c1 <= '9') || (c1 >= 'A' && c1 <= 'F')) &&
((c2 >= '0' && c2 <= '9') || (c2 >= 'A' && c2 <= 'F'))) {
// check if part of an escape sequence
*outbuf++=c; // already
// dont escape again
mp_tmsg(MSGT_NETWORK,MSGL_ERR,"String appears to be already escaped in url_escape %c%c1%c2\n",c,c1,c2);
// error as this should not happen against RFC 2396
// to escape a string twice
} else {
/* all others will be escaped */
c1 = ((c & 0xf0) >> 4);
c2 = (c & 0x0f);
if (c1 < 10) c1+='0';
else c1+='A'-10;
if (c2 < 10) c2+='0';
else c2+='A'-10;
*outbuf++ = '%';
*outbuf++ = c1;
*outbuf++ = c2;
}
}
*outbuf++='\0';
}
/* Replace specific characters in the URL string by an escape sequence */
/* works like strcpy(), but without return argument */
void
url_escape_string(char *outbuf, const char *inbuf) {
unsigned char c;
int i = 0,j,len = strlen(inbuf);
char* tmp,*unesc = NULL, *in;
// Look if we have an ip6 address, if so skip it there is
// no need to escape anything in there.
tmp = strstr(inbuf,"://[");
if(tmp) {
tmp = strchr(tmp+4,']');
if(tmp && (tmp[1] == '/' || tmp[1] == ':' ||
tmp[1] == '\0')) {
i = tmp+1-inbuf;
strncpy(outbuf,inbuf,i);
outbuf += i;
tmp = NULL;
}
}
tmp = NULL;
while(i < len) {
// look for the next char that must be kept
for (j=i;j<len;j++) {
c = inbuf[j];
if(c=='-' || c=='_' || c=='.' || c=='!' || c=='~' || /* mark characters */
c=='*' || c=='\'' || c=='(' || c==')' || /* do not touch escape character */
c==';' || c=='/' || c=='?' || c==':' || c=='@' || /* reserved characters */
c=='&' || c=='=' || c=='+' || c=='$' || c==',') /* see RFC 2396 */
break;
}
// we are on a reserved char, write it out
if(j == i) {
*outbuf++ = c;
i++;
continue;
}
// we found one, take that part of the string
if(j < len) {
if(!tmp) tmp = malloc(len+1);
strncpy(tmp,inbuf+i,j-i);
tmp[j-i] = '\0';
in = tmp;
} else // take the rest of the string
in = (char*)inbuf+i;
if(!unesc) unesc = malloc(len+1);
// unescape first to avoid escaping escape
url_unescape_string(unesc,in);
// then escape, including mark and other reserved chars
// that can come from escape sequences
url_escape_string_part(outbuf,unesc);
outbuf += strlen(outbuf);
i += strlen(in);
}
*outbuf = '\0';
free(tmp);
free(unesc);
}
#ifdef URL_DEBUG
void
url_debug(const URL_t *url) {
if( url==NULL ) {
printf("URL pointer NULL\n");
return;
}
if( url->url!=NULL ) {
printf("url=%s\n", url->url );
}
if( url->protocol!=NULL ) {
printf("protocol=%s\n", url->protocol );
}
if( url->hostname!=NULL ) {
printf("hostname=%s\n", url->hostname );
}
printf("port=%d\n", url->port );
if( url->file!=NULL ) {
printf("file=%s\n", url->file );
}
if( url->username!=NULL ) {
printf("username=%s\n", url->username );
}
if( url->password!=NULL ) {
printf("password=%s\n", url->password );
}
}
#endif /* URL_DEBUG */
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