mpv/libmpdemux/url.c

328 lines
9.4 KiB
C

/*
* URL Helper
* by Bertrand Baudet <bertrand_baudet@yahoo.com>
* (C) 2001, MPlayer team.
*
*/
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include "url.h"
#include "mp_msg.h"
URL_t*
url_new(const char* url) {
int pos1, pos2,v6addr = 0;
URL_t* Curl;
char *escfilename=NULL;
char *unescfilename=NULL;
char *ptr1=NULL, *ptr2=NULL, *ptr3=NULL, *ptr4=NULL;
int jumpSize = 3;
if( url==NULL ) return NULL;
// Create temp filename space
unescfilename=malloc(strlen(url)+1);
if (!unescfilename ) {
mp_msg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed!\n");
return NULL;
}
escfilename=malloc(strlen(url)*3+1);
if (!escfilename ) {
free(unescfilename);
mp_msg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed!\n");
return NULL;
}
// Create the URL container
Curl = (URL_t*)malloc(sizeof(URL_t));
if( Curl==NULL ) {
mp_msg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed!\n");
if (unescfilename) free(unescfilename);
if (escfilename) free(escfilename);
return NULL;
}
// Initialisation of the URL container members
memset( Curl, 0, sizeof(URL_t) );
//create unescaped/escaped versions of url
url_unescape_string(unescfilename,url); // this is to prevent us from escaping an unescaped string
// violating RFC 2396
url_escape_string(escfilename,unescfilename);
free(unescfilename);
// Copy the url in the URL container
Curl->url = strdup(escfilename);
if( Curl->url==NULL ) {
mp_msg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed!\n");
url_free(Curl);
return NULL;
}
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");
url_free(Curl);
return NULL;
}
}
pos1 = ptr1-escfilename;
Curl->protocol = (char*)malloc(pos1+1);
strncpy(Curl->protocol, escfilename, pos1);
if( Curl->protocol==NULL ) {
mp_msg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed!\n");
url_free(Curl);
return NULL;
}
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 = (char*)malloc(len+1);
if( Curl->username==NULL ) {
mp_msg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed!\n");
url_free(Curl);
return NULL;
}
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 = (char*)malloc(len2+1);
if( Curl->password==NULL ) {
mp_msg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed!\n");
url_free(Curl);
return NULL;
}
strncpy( Curl->password, ptr3+1, len2);
Curl->password[len2]='\0';
}
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 = (char*)malloc(pos2-pos1+1);
if( Curl->hostname==NULL ) {
mp_msg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed!\n");
url_free(Curl);
return NULL;
}
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_msg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed!\n");
url_free(Curl);
return NULL;
}
}
}
// Check if a filename was given or set, else set it with '/'
if( Curl->file==NULL ) {
Curl->file = (char*)malloc(2);
if( Curl->file==NULL ) {
mp_msg(MSGT_NETWORK,MSGL_FATAL,"Memory allocation failed!\n");
url_free(Curl);
return NULL;
}
strcpy(Curl->file, "/");
}
free(escfilename);
return Curl;
}
void
url_free(URL_t* url) {
if(!url) return;
if(url->url) free(url->url);
if(url->protocol) free(url->protocol);
if(url->hostname) free(url->hostname);
if(url->file) free(url->file);
if(url->username) free(url->username);
if(url->password) free(url->password);
free(url);
}
/* Replace escape sequences in an URL (or a part of an URL) */
/* works like strcpy(), but without return argument */
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
}
/* 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,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') ||
(c >= 0x7f) || /* fareast languages(Chinese, Korean, Japanese) */
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 */
c=='\0' ) { /* string term char */
*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_msg(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';
}
#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