1 /*****************************************************************************
2 * zipaccess.c: Module (access) to extract different archives, based on zlib
3 *****************************************************************************
4 * Copyright (C) 2009 VLC authors and VideoLAN
7 * Authors: Jean-Philippe André <jpeg@videolan.org>
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU Lesser General Public License as published by
11 * the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this program; if not, write to the Free Software Foundation,
21 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
25 * - implement crypto (using url zip://user:password@path-to-archive!/file)
26 * - read files in zip with long name (use unz_file_info.size_filename)
27 * - multi-volume archive support ?
35 #include <vlc_access.h>
37 /** **************************************************************************
38 * This is our own access_sys_t for zip files
39 *****************************************************************************/
42 /* zlib / unzip members */
44 zlib_filefunc_def *fileFunctions;
46 /* file in zip information */
50 static int AccessControl( access_t *p_access, int i_query, va_list args );
51 static ssize_t AccessRead( access_t *, uint8_t *, size_t );
52 static int AccessSeek( access_t *, uint64_t );
53 static int OpenFileInZip( access_t *p_access );
54 static char *unescapeXml( const char *psz_text );
56 /** **************************************************************************
57 * \brief Unescape valid XML string
58 * The exact reverse of escapeToXml (zipstream.c)
59 *****************************************************************************/
60 static char *unescapeXml( const char *psz_text )
62 char *psz_ret = malloc( strlen( psz_text ) + 1 );
63 if( unlikely( !psz_ret ) ) return NULL;
65 char *psz_tmp = psz_ret;
66 for( char *psz_iter = (char*) psz_text; *psz_iter; ++psz_iter, ++psz_tmp )
68 if( *psz_iter == '?' )
71 if( !sscanf( ++psz_iter, "%02x", &i_value ) )
73 /* Invalid number: URL incorrectly encoded */
77 *psz_tmp = (char) i_value;
80 else if( isAllowedChar( *psz_iter ) )
86 /* Invalid character encoding for the URL */
96 /** **************************************************************************
98 *****************************************************************************/
99 int AccessOpen( vlc_object_t *p_this )
101 access_t *p_access = (access_t*)p_this;
103 int i_ret = VLC_EGENERIC;
106 char *psz_pathToZip = NULL, *psz_path = NULL, *psz_sep = NULL;
108 if( !strstr( p_access->psz_location, ZIP_SEP ) )
110 msg_Dbg( p_access, "location does not contain separator " ZIP_SEP );
114 p_access->p_sys = p_sys = (access_sys_t*)
115 calloc( 1, sizeof( access_sys_t ) );
116 if( unlikely( !p_sys ) )
120 psz_path = strdup( p_access->psz_location );
121 psz_sep = strstr( psz_path, ZIP_SEP );
124 psz_pathToZip = unescapeXml( psz_path );
127 /* Maybe this was not an encoded string */
128 msg_Dbg( p_access, "not an encoded URL Trying file '%s'",
130 psz_pathToZip = strdup( psz_path );
131 if( unlikely( !psz_pathToZip ) )
137 p_sys->psz_fileInzip = unescapeXml( psz_sep + ZIP_SEP_LEN );
138 if( unlikely( !p_sys->psz_fileInzip ) )
140 p_sys->psz_fileInzip = strdup( psz_sep + ZIP_SEP_LEN );
141 if( unlikely( !p_sys->psz_fileInzip ) )
148 /* Define IO functions */
149 zlib_filefunc_def *p_func = (zlib_filefunc_def*)
150 calloc( 1, sizeof( zlib_filefunc_def ) );
151 if( unlikely( !p_func ) )
156 p_func->zopen_file = ZipIO_Open;
157 p_func->zread_file = ZipIO_Read;
158 p_func->zwrite_file = ZipIO_Write; // see comment
159 p_func->ztell_file = ZipIO_Tell;
160 p_func->zseek_file = ZipIO_Seek;
161 p_func->zclose_file = ZipIO_Close;
162 p_func->zerror_file = ZipIO_Error;
163 p_func->opaque = p_access;
165 /* Open zip archive */
166 file = p_access->p_sys->zipFile = unzOpen2( psz_pathToZip, p_func );
169 msg_Err( p_access, "not a valid zip archive: '%s'", psz_pathToZip );
170 i_ret = VLC_EGENERIC;
174 /* Open file in zip */
175 if( ( i_ret = OpenFileInZip( p_access ) ) != VLC_SUCCESS )
179 ACCESS_SET_CALLBACKS( AccessRead, NULL, AccessControl, AccessSeek );
181 /* Get some infos about current file. Maybe we could want some more ? */
182 unz_file_info z_info;
183 unzGetCurrentFileInfo( file, &z_info, NULL, 0, NULL, 0, NULL, 0 );
185 /* Set access information: size is needed for AccessSeek */
186 p_access->info.i_size = z_info.uncompressed_size;
187 p_access->info.i_pos = 0;
188 p_access->info.b_eof = false;
193 if( i_ret != VLC_SUCCESS )
197 unzCloseCurrentFile( file );
200 free( p_sys->psz_fileInzip );
201 free( p_sys->fileFunctions );
205 free( psz_pathToZip );
210 /** **************************************************************************
211 * \brief Close access: free structures
212 *****************************************************************************/
213 void AccessClose( vlc_object_t *p_this )
215 access_t *p_access = (access_t*)p_this;
216 access_sys_t *p_sys = p_access->p_sys;
219 unzFile file = p_sys->zipFile;
222 unzCloseCurrentFile( file );
225 free( p_sys->psz_fileInzip );
226 free( p_sys->fileFunctions );
231 /** **************************************************************************
232 * \brief Control access
233 *****************************************************************************/
234 static int AccessControl( access_t *p_access, int i_query, va_list args )
242 case ACCESS_CAN_SEEK:
243 case ACCESS_CAN_PAUSE:
244 case ACCESS_CAN_CONTROL_PACE:
245 pb_bool = (bool*)va_arg( args, bool* );
249 case ACCESS_CAN_FASTSEEK:
250 pb_bool = (bool*)va_arg( args, bool* );
254 case ACCESS_GET_PTS_DELAY:
255 pi_64 = (int64_t*)va_arg( args, int64_t * );
256 *pi_64 = DEFAULT_PTS_DELAY;
260 case ACCESS_SET_PAUSE_STATE:
264 case ACCESS_GET_TITLE_INFO:
265 case ACCESS_SET_TITLE:
266 case ACCESS_SET_SEEKPOINT:
267 case ACCESS_SET_PRIVATE_ID_STATE:
268 case ACCESS_GET_META:
269 case ACCESS_GET_PRIVATE_ID_STATE:
270 case ACCESS_GET_CONTENT_TYPE:
274 msg_Warn( p_access, "unimplemented query %d in control", i_query );
281 /** **************************************************************************
283 * Reads current opened file in zip. This does not open the file in zip.
284 * Return -1 if no data yet, 0 if no more data, else real data read
285 *****************************************************************************/
286 static ssize_t AccessRead( access_t *p_access, uint8_t *p_buffer, size_t sz )
288 access_sys_t *p_sys = p_access->p_sys;
290 unzFile file = p_sys->zipFile;
293 msg_Err( p_access, "archive not opened !" );
298 i_read = unzReadCurrentFile( file, p_buffer, sz );
300 p_access->info.i_pos = unztell( file );
301 return ( i_read >= 0 ? i_read : VLC_EGENERIC );
304 /** **************************************************************************
305 * \brief Seek inside zip file
306 *****************************************************************************/
307 static int AccessSeek( access_t *p_access, uint64_t seek_len )
309 access_sys_t *p_sys = p_access->p_sys;
311 unzFile file = p_sys->zipFile;
315 msg_Err( p_access, "archive not opened !" );
319 /* Reopen file in zip if needed */
320 if( p_access->info.i_pos > seek_len )
322 OpenFileInZip( p_access );
325 /* Read seek_len data and drop it */
328 char *p_buffer = ( char* ) calloc( 1, ZIP_BUFFER_LEN );
329 if( unlikely( !p_buffer ) )
331 while( ( i_seek < seek_len ) && ( i_read > 0 ) )
333 i_read = ( seek_len - i_seek < ZIP_BUFFER_LEN )
334 ? ( seek_len - i_seek ) : ZIP_BUFFER_LEN;
335 i_read = unzReadCurrentFile( file, p_buffer, i_read );
338 msg_Warn( p_access, "could not seek in file" );
349 p_access->info.i_pos = unztell( file );
353 /** **************************************************************************
354 * \brief Open file in zip
355 *****************************************************************************/
356 static int OpenFileInZip( access_t *p_access )
358 access_sys_t *p_sys = p_access->p_sys;
359 unzFile file = p_sys->zipFile;
360 if( !p_sys->psz_fileInzip )
365 p_access->info.i_pos = 0;
367 unzCloseCurrentFile( file ); /* returns UNZ_PARAMERROR if file not opened */
368 if( unzLocateFile( file, p_sys->psz_fileInzip, 0 ) != UNZ_OK )
370 msg_Err( p_access, "could not [re]locate file in zip: '%s'",
371 p_sys->psz_fileInzip );
374 if( unzOpenCurrentFile( file ) != UNZ_OK )
376 msg_Err( p_access, "could not [re]open file in zip: '%s'",
377 p_sys->psz_fileInzip );
384 /** **************************************************************************
385 * \brief I/O functions for the ioapi: open (read only)
386 *****************************************************************************/
387 static void* ZCALLBACK ZipIO_Open( void* opaque, const char* file, int mode )
389 assert(opaque != NULL);
390 assert(mode == (ZLIB_FILEFUNC_MODE_READ | ZLIB_FILEFUNC_MODE_EXISTING));
392 access_t *p_access = (access_t*) opaque;
394 char *fileUri = malloc( strlen(file) + 8 );
395 if( unlikely( !fileUri ) )
397 if( !strstr( file, "://" ) )
399 strcpy( fileUri, "file://" );
400 strcat( fileUri, file );
404 strcpy( fileUri, file );
407 stream_t *s = stream_UrlNew( p_access, fileUri );
412 /** **************************************************************************
413 * \brief I/O functions for the ioapi: read
414 *****************************************************************************/
415 static uLong ZCALLBACK ZipIO_Read( void* opaque, void* stream,
416 void* buf, uLong size )
419 //access_t *p_access = (access_t*) opaque;
420 //msg_Dbg(p_access, "read %d", size);
421 return stream_Read( (stream_t*) stream, buf, size );
424 /** **************************************************************************
425 * \brief I/O functions for the ioapi: write (assert insteadof segfault)
426 *****************************************************************************/
427 static uLong ZCALLBACK ZipIO_Write( void* opaque, void* stream,
428 const void* buf, uLong size )
430 (void)opaque; (void)stream; (void)buf; (void)size;
431 int zip_access_cannot_write_this_should_not_happen = 0;
432 assert(zip_access_cannot_write_this_should_not_happen);
436 /** **************************************************************************
437 * \brief I/O functions for the ioapi: tell
438 *****************************************************************************/
439 static long ZCALLBACK ZipIO_Tell( void* opaque, void* stream )
442 int64_t i64_tell = stream_Tell( (stream_t*) stream );
443 //access_t *p_access = (access_t*) opaque;
444 //msg_Dbg(p_access, "tell %" PRIu64, i64_tell);
445 return (long)i64_tell;
448 /** **************************************************************************
449 * \brief I/O functions for the ioapi: seek
450 *****************************************************************************/
451 static long ZCALLBACK ZipIO_Seek( void* opaque, void* stream,
452 uLong offset, int origin )
455 int64_t pos = offset;
459 pos += stream_Tell( (stream_t*) stream );
464 pos += stream_Size( (stream_t*) stream );
471 stream_Seek( (stream_t*) stream, pos );
472 /* Note: in unzip.c, unzlocal_SearchCentralDir seeks to the end of
473 the stream, which is doable but returns an error in VLC.
474 That's why we always assume this was OK. FIXME */
478 /** **************************************************************************
479 * \brief I/O functions for the ioapi: close
480 *****************************************************************************/
481 static int ZCALLBACK ZipIO_Close( void* opaque, void* stream )
484 stream_Delete( (stream_t*) stream );
488 /** **************************************************************************
489 * \brief I/O functions for the ioapi: test error (man 3 ferror)
490 *****************************************************************************/
491 static int ZCALLBACK ZipIO_Error( void* opaque, void* stream )
495 //msg_Dbg( p_access, "error" );