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mpv/common/asxparser.c

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/*
* 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 "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <unistd.h>
#include "playlist.h"
#include "playlist_parser.h"
#include "stream/stream.h"
#include "asxparser.h"
#include "common/msg.h"
typedef struct ASX_Parser_t ASX_Parser_t;
typedef struct {
char* buffer;
int line;
} ASX_LineSave_t;
struct ASX_Parser_t {
int line; // Curent line
ASX_LineSave_t *ret_stack;
int ret_stack_size;
char* last_body;
int deep;
struct playlist *pl;
};
ASX_Parser_t *asx_parser_new(struct playlist *pl);
void
asx_parser_free(ASX_Parser_t* parser);
/*
* Return -1 on error, 0 when nothing is found, 1 on sucess
*/
int
asx_get_element(ASX_Parser_t* parser,char** _buffer,
char** _element,char** _body,char*** _attribs);
int
asx_parse_attribs(ASX_Parser_t* parser,char* buffer,char*** _attribs);
/////// Attribs utils
char*
asx_get_attrib(const char* attrib,char** attribs);
#define asx_free_attribs(a) asx_list_free(&a,free)
////// List utils
typedef void (*ASX_FreeFunc)(void* arg);
void
asx_list_free(void* list_ptr,ASX_FreeFunc free_func);
////// List utils
void
asx_list_free(void* list_ptr,ASX_FreeFunc free_func) {
void** ptr = *(void***)list_ptr;
if(ptr == NULL) return;
if(free_func != NULL) {
for( ; *ptr != NULL ; ptr++)
free_func(*ptr);
}
free(*(void**)list_ptr);
*(void**)list_ptr = NULL;
}
/////// Attribs utils
char*
asx_get_attrib(const char* attrib,char** attribs) {
char** ptr;
if(attrib == NULL || attribs == NULL) return NULL;
for(ptr = attribs; ptr[0] != NULL; ptr += 2){
if(strcasecmp(ptr[0],attrib) == 0)
return strdup(ptr[1]);
}
return NULL;
}
#define asx_warning_attrib_required(p,e,a) mp_msg(MSGT_PLAYTREE,MSGL_WARN,"At line %d : element %s don't have the required attribute %s",p->line,e,a)
#define asx_warning_body_parse_error(p,e) mp_msg(MSGT_PLAYTREE,MSGL_WARN,"At line %d : error while parsing %s body",p->line,e)
ASX_Parser_t *asx_parser_new(struct playlist *pl)
{
ASX_Parser_t* parser = calloc(1,sizeof(ASX_Parser_t));
parser->pl = pl;
return parser;
}
void
asx_parser_free(ASX_Parser_t* parser) {
if(!parser) return;
free(parser->ret_stack);
free(parser);
}
#define LETTER "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
#define SPACE " \n\t\r"
int
asx_parse_attribs(ASX_Parser_t* parser,char* buffer,char*** _attribs) {
char *ptr1, *ptr2, *ptr3;
int n_attrib = 0;
char **attribs = NULL;
char *attrib, *val;
ptr1 = buffer;
while(1) {
for( ; strchr(SPACE,*ptr1) != NULL; ptr1++) { // Skip space
if(*ptr1 == '\0') break;
}
ptr3 = strchr(ptr1,'=');
if(ptr3 == NULL) break;
for(ptr2 = ptr3-1; strchr(SPACE,*ptr2) != NULL; ptr2--) {
if (ptr2 == ptr1) {
mp_msg(MSGT_PLAYTREE,MSGL_ERR,"At line %d : this should never append, back to attribute begin while skipping end space",parser->line);
break;
}
}
attrib = malloc(ptr2-ptr1+2);
strncpy(attrib,ptr1,ptr2-ptr1+1);
attrib[ptr2-ptr1+1] = '\0';
ptr1 = strchr(ptr3,'"');
if(ptr1 == NULL || ptr1[1] == '\0') ptr1 = strchr(ptr3,'\'');
if(ptr1 == NULL || ptr1[1] == '\0') {
mp_msg(MSGT_PLAYTREE,MSGL_WARN,"At line %d : can't find attribute %s value",parser->line,attrib);
free(attrib);
break;
}
ptr2 = strchr(ptr1+1,ptr1[0]);
if (ptr2 == NULL) {
mp_msg(MSGT_PLAYTREE,MSGL_WARN,"At line %d : value of attribute %s isn't finished",parser->line,attrib);
free(attrib);
break;
}
ptr1++;
val = malloc(ptr2-ptr1+1);
strncpy(val,ptr1,ptr2-ptr1);
val[ptr2-ptr1] = '\0';
n_attrib++;
attribs = realloc(attribs, (2 * n_attrib + 1) * sizeof(char*));
attribs[n_attrib*2-2] = attrib;
attribs[n_attrib*2-1] = val;
ptr1 = ptr2+1;
}
if(n_attrib > 0)
attribs[n_attrib*2] = NULL;
*_attribs = attribs;
return n_attrib;
}
/*
* Return -1 on error, 0 when nothing is found, 1 on sucess
*/
int
asx_get_element(ASX_Parser_t* parser,char** _buffer,
char** _element,char** _body,char*** _attribs) {
char *ptr1,*ptr2, *ptr3, *ptr4;
char *attribs = NULL;
char *element = NULL, *body = NULL, *ret = NULL, *buffer;
int n_attrib = 0;
int body_line = 0,attrib_line,ret_line,in = 0;
int quotes = 0;
if(_buffer == NULL || _element == NULL || _body == NULL || _attribs == NULL) {
mp_msg(MSGT_PLAYTREE,MSGL_ERR,"At line %d : asx_get_element called with invalid value",parser->line);
return -1;
}
*_body = *_element = NULL;
*_attribs = NULL;
buffer = *_buffer;
if(buffer == NULL) return 0;
if(parser->ret_stack && /*parser->last_body && */buffer != parser->last_body) {
ASX_LineSave_t* ls = parser->ret_stack;
int i;
for(i = 0 ; i < parser->ret_stack_size ; i++) {
if(buffer == ls[i].buffer) {
parser->line = ls[i].line;
break;
}
}
if( i < parser->ret_stack_size) {
i++;
if( i < parser->ret_stack_size)
memmove(parser->ret_stack,parser->ret_stack+i, (parser->ret_stack_size - i)*sizeof(ASX_LineSave_t));
parser->ret_stack_size -= i;
if(parser->ret_stack_size > 0)
parser->ret_stack = realloc(parser->ret_stack,parser->ret_stack_size*sizeof(ASX_LineSave_t));
else {
free(parser->ret_stack);
parser->ret_stack = NULL;
}
}
}
ptr1 = buffer;
while(1) {
for( ; ptr1[0] != '<' ; ptr1++) {
if(ptr1[0] == '\0') {
ptr1 = NULL;
break;
}
if(ptr1[0] == '\n') parser->line++;
}
//ptr1 = strchr(ptr1,'<');
if(!ptr1 || ptr1[1] == '\0') return 0; // Nothing found
if(strncmp(ptr1,"<!--",4) == 0) { // Comments
for( ; strncmp(ptr1,"-->",3) != 0 ; ptr1++) {
if(ptr1[0] == '\0') {
ptr1 = NULL;
break;
}
if(ptr1[0] == '\n') parser->line++;
}
//ptr1 = strstr(ptr1,"-->");
if(!ptr1) {
mp_msg(MSGT_PLAYTREE,MSGL_ERR,"At line %d : unfinished comment",parser->line);
return -1;
}
} else {
break;
}
}
// Is this space skip very useful ??
for(ptr1++; strchr(SPACE,ptr1[0]) != NULL; ptr1++) { // Skip space
if(ptr1[0] == '\0') {
mp_msg(MSGT_PLAYTREE,MSGL_ERR,"At line %d : EOB reached while parsing element start",parser->line);
return -1;
}
if(ptr1[0] == '\n') parser->line++;
}
for(ptr2 = ptr1; strchr(LETTER,*ptr2) != NULL;ptr2++) { // Go to end of name
if(*ptr2 == '\0'){
mp_msg(MSGT_PLAYTREE,MSGL_ERR,"At line %d : EOB reached while parsing element start",parser->line);
return -1;
}
if(ptr2[0] == '\n') parser->line++;
}
element = malloc(ptr2-ptr1+1);
strncpy(element,ptr1,ptr2-ptr1);
element[ptr2-ptr1] = '\0';
for( ; strchr(SPACE,*ptr2) != NULL; ptr2++) { // Skip space
if(ptr2[0] == '\0') {
mp_msg(MSGT_PLAYTREE,MSGL_ERR,"At line %d : EOB reached while parsing element start",parser->line);
free(element);
return -1;
}
if(ptr2[0] == '\n') parser->line++;
}
attrib_line = parser->line;
for(ptr3 = ptr2; ptr3[0] != '\0'; ptr3++) { // Go to element end
if(ptr3[0] == '"') quotes ^= 1;
if(!quotes && (ptr3[0] == '>' || strncmp(ptr3,"/>",2) == 0))
break;
if(ptr3[0] == '\n') parser->line++;
}
if(ptr3[0] == '\0' || ptr3[1] == '\0') { // End of file
mp_msg(MSGT_PLAYTREE,MSGL_ERR,"At line %d : EOB reached while parsing element start",parser->line);
free(element);
return -1;
}
// Save attribs string
if(ptr3-ptr2 > 0) {
attribs = malloc(ptr3-ptr2+1);
strncpy(attribs,ptr2,ptr3-ptr2);
attribs[ptr3-ptr2] = '\0';
}
//bs_line = parser->line;
if(ptr3[0] != '/') { // Not Self closed element
ptr3++;
for( ; strchr(SPACE,*ptr3) != NULL; ptr3++) { // Skip space on body begin
if(*ptr3 == '\0') {
mp_msg(MSGT_PLAYTREE,MSGL_ERR,"At line %d : EOB reached while parsing %s element body",parser->line,element);
free(element);
free(attribs);
return -1;
}
if(ptr3[0] == '\n') parser->line++;
}
ptr4 = ptr3;
body_line = parser->line;
while(1) { // Find closing element
for( ; ptr4[0] != '<' ; ptr4++) {
if(ptr4[0] == '\0') {
ptr4 = NULL;
break;
}
if(ptr4[0] == '\n') parser->line++;
}
if(ptr4 && strncmp(ptr4,"<!--",4) == 0) { // Comments
for( ; strncmp(ptr4,"-->",3) != 0 ; ptr4++) {
if(ptr4[0] == '\0') {
ptr4 = NULL;
break;
}
if(ptr1[0] == '\n') parser->line++;
}
continue;
}
if(ptr4 == NULL || ptr4[1] == '\0') {
mp_msg(MSGT_PLAYTREE,MSGL_ERR,"At line %d : EOB reached while parsing %s element body",parser->line,element);
free(element);
free(attribs);
return -1;
}
if(ptr4[1] != '/' && strncasecmp(element,ptr4+1,strlen(element)) == 0) {
in++;
ptr4+=2;
continue;
} else if(strncasecmp(element,ptr4+2,strlen(element)) == 0) { // Extract body
if(in > 0) {
in--;
ptr4 += 2+strlen(element);
continue;
}
ret = ptr4+strlen(element)+3;
if(ptr4 != ptr3) {
ptr4--;
for( ; ptr4 != ptr3 && strchr(SPACE,*ptr4) != NULL; ptr4--) ;// Skip space on body end
// if(ptr4[0] == '\0') parser->line--;
//}
ptr4++;
body = malloc(ptr4-ptr3+1);
strncpy(body,ptr3,ptr4-ptr3);
body[ptr4-ptr3] = '\0';
}
break;
} else {
ptr4 += 2;
}
}
} else {
ret = ptr3 + 2; // 2 is for />
}
for( ; ret[0] != '\0' && strchr(SPACE,ret[0]) != NULL; ret++) { // Skip space
if(ret[0] == '\n') parser->line++;
}
ret_line = parser->line;
if(attribs) {
parser->line = attrib_line;
n_attrib = asx_parse_attribs(parser,attribs,_attribs);
free(attribs);
if(n_attrib < 0) {
mp_msg(MSGT_PLAYTREE,MSGL_WARN,"At line %d : error while parsing element %s attributes",parser->line,element);
free(element);
free(body);
return -1;
}
} else
*_attribs = NULL;
*_element = element;
*_body = body;
parser->last_body = body;
parser->ret_stack_size++;
parser->ret_stack = realloc(parser->ret_stack,parser->ret_stack_size*sizeof(ASX_LineSave_t));
if(parser->ret_stack_size > 1)
memmove(parser->ret_stack+1,parser->ret_stack,(parser->ret_stack_size-1)*sizeof(ASX_LineSave_t));
parser->ret_stack[0].buffer = ret;
parser->ret_stack[0].line = ret_line;
parser->line = body ? body_line : ret_line;
*_buffer = ret;
return 1;
}
static void
asx_parse_ref(ASX_Parser_t* parser, char** attribs) {
char *href;
href = asx_get_attrib("HREF",attribs);
if(href == NULL) {
asx_warning_attrib_required(parser,"REF" ,"HREF" );
return;
}
#if 0
// replace http my mmshttp to avoid infinite loops
// disabled since some playlists for e.g. WinAMP use asx as well
// "-user-agent NSPlayer/4.1.0.3856" is a possible workaround
if (strncmp(href, "http://", 7) == 0) {
char *newref = malloc(3 + strlen(href) + 1);
strcpy(newref, "mms");
strcpy(newref + 3, href);
free(href);
href = newref;
}
#endif
playlist_add_file(parser->pl, href);
mp_msg(MSGT_PLAYTREE,MSGL_V,"Adding file %s to element entry\n",href);
free(href);
}
static void asx_parse_entryref(ASX_Parser_t* parser,char* buffer,char** _attribs) {
char *href;
if(parser->deep > 0)
return;
href = asx_get_attrib("HREF",_attribs);
if(href == NULL) {
asx_warning_attrib_required(parser,"ENTRYREF" ,"HREF" );
return;
}
mp_msg(MSGT_PLAYTREE,MSGL_ERR,"Recursive playlist %s\n", href);
playlist_add_file(parser->pl, href);
free(href);
//mp_msg(MSGT_PLAYTREE,MSGL_INFO,"Need to implement entryref\n");
}
static void asx_parse_entry(ASX_Parser_t* parser,char* buffer,char** _attribs) {
char *element,*body,**attribs;
int r;
while(buffer && buffer[0] != '\0') {
r = asx_get_element(parser,&buffer,&element,&body,&attribs);
if(r < 0) {
asx_warning_body_parse_error(parser,"ENTRY");
return;
} else if (r == 0) { // No more element
break;
}
if(strcasecmp(element,"REF") == 0) {
asx_parse_ref(parser,attribs);
mp_msg(MSGT_PLAYTREE,MSGL_DBG2,"Adding element %s to entry\n",element);
} else
mp_msg(MSGT_PLAYTREE,MSGL_DBG2,"Ignoring element %s\n",element);
free(body);
asx_free_attribs(attribs);
}
}
static void asx_parse_repeat(ASX_Parser_t* parser,char* buffer,char** _attribs) {
char *element,*body,**attribs;
int r;
asx_get_attrib("COUNT",_attribs);
mp_msg(MSGT_PLAYTREE,MSGL_ERR,"Ignoring repeated playlist entries\n");
while(buffer && buffer[0] != '\0') {
r = asx_get_element(parser,&buffer,&element,&body,&attribs);
if(r < 0) {
asx_warning_body_parse_error(parser,"REPEAT");
return;
} else if (r == 0) { // No more element
break;
}
if(strcasecmp(element,"ENTRY") == 0) {
asx_parse_entry(parser,body,attribs);
} else if(strcasecmp(element,"ENTRYREF") == 0) {
asx_parse_entryref(parser,body,attribs);
} else if(strcasecmp(element,"REPEAT") == 0) {
asx_parse_repeat(parser,body,attribs);
} else
mp_msg(MSGT_PLAYTREE,MSGL_DBG2,"Ignoring element %s\n",element);
free(body);
asx_free_attribs(attribs);
}
}
bool asx_parse(char* buffer, struct playlist *pl)
{
char *element,*asx_body,**asx_attribs,*body = NULL, **attribs;
int r;
ASX_Parser_t* parser = asx_parser_new(pl);
parser->line = 1;
parser->deep = 0;
r = asx_get_element(parser,&buffer,&element,&asx_body,&asx_attribs);
if(r < 0) {
mp_msg(MSGT_PLAYTREE,MSGL_ERR,"At line %d : Syntax error ???",parser->line);
asx_parser_free(parser);
return false;
} else if(r == 0) { // No contents
mp_msg(MSGT_PLAYTREE,MSGL_ERR,"empty asx element");
asx_parser_free(parser);
return false;
}
if(strcasecmp(element,"ASX") != 0) {
mp_msg(MSGT_PLAYTREE,MSGL_ERR,"first element isn't ASX, it's %s\n",element);
asx_free_attribs(asx_attribs);
asx_parser_free(parser);
return false;
}
if(!asx_body) {
mp_msg(MSGT_PLAYTREE,MSGL_ERR,"ASX element is empty");
asx_free_attribs(asx_attribs);
asx_parser_free(parser);
return false;
}
buffer = asx_body;
while(buffer && buffer[0] != '\0') {
r = asx_get_element(parser,&buffer,&element,&body,&attribs);
if(r < 0) {
asx_warning_body_parse_error(parser,"ASX");
asx_parser_free(parser);
return false;
} else if (r == 0) { // No more element
break;
}
if(strcasecmp(element,"ENTRY") == 0) {
asx_parse_entry(parser,body,attribs);
} else if(strcasecmp(element,"ENTRYREF") == 0) {
asx_parse_entryref(parser,body,attribs);
} else if(strcasecmp(element,"REPEAT") == 0) {
asx_parse_repeat(parser,body,attribs);
} else
mp_msg(MSGT_PLAYTREE,MSGL_DBG2,"Ignoring element %s\n",element);
free(body);
asx_free_attribs(attribs);
}
free(asx_body);
asx_free_attribs(asx_attribs);
asx_parser_free(parser);
return true;
}
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