diff options
Diffstat (limited to 'external/libcurl_android/jni/libcurl/lib/content_encoding.c')
| -rwxr-xr-x | external/libcurl_android/jni/libcurl/lib/content_encoding.c | 435 |
1 files changed, 0 insertions, 435 deletions
diff --git a/external/libcurl_android/jni/libcurl/lib/content_encoding.c b/external/libcurl_android/jni/libcurl/lib/content_encoding.c deleted file mode 100755 index c68e6e5f..00000000 --- a/external/libcurl_android/jni/libcurl/lib/content_encoding.c +++ /dev/null @@ -1,435 +0,0 @@ -/*************************************************************************** - * _ _ ____ _ - * Project ___| | | | _ \| | - * / __| | | | |_) | | - * | (__| |_| | _ <| |___ - * \___|\___/|_| \_\_____| - * - * Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al. - * - * This software is licensed as described in the file COPYING, which - * you should have received as part of this distribution. The terms - * are also available at http://curl.haxx.se/docs/copyright.html. - * - * You may opt to use, copy, modify, merge, publish, distribute and/or sell - * copies of the Software, and permit persons to whom the Software is - * furnished to do so, under the terms of the COPYING file. - * - * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY - * KIND, either express or implied. - * - ***************************************************************************/ - -#include "curl_setup.h" - -#ifdef HAVE_LIBZ - -#include "urldata.h" -#include <curl/curl.h> -#include "sendf.h" -#include "content_encoding.h" -#include "curl_memory.h" - -#include "memdebug.h" - -/* Comment this out if zlib is always going to be at least ver. 1.2.0.4 - (doing so will reduce code size slightly). */ -#define OLD_ZLIB_SUPPORT 1 - -#define DSIZ CURL_MAX_WRITE_SIZE /* buffer size for decompressed data */ - -#define GZIP_MAGIC_0 0x1f -#define GZIP_MAGIC_1 0x8b - -/* gzip flag byte */ -#define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */ -#define HEAD_CRC 0x02 /* bit 1 set: header CRC present */ -#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */ -#define ORIG_NAME 0x08 /* bit 3 set: original file name present */ -#define COMMENT 0x10 /* bit 4 set: file comment present */ -#define RESERVED 0xE0 /* bits 5..7: reserved */ - -static voidpf -zalloc_cb(voidpf opaque, unsigned int items, unsigned int size) -{ - (void) opaque; - /* not a typo, keep it calloc() */ - return (voidpf) calloc(items, size); -} - -static void -zfree_cb(voidpf opaque, voidpf ptr) -{ - (void) opaque; - free(ptr); -} - -static CURLcode -process_zlib_error(struct connectdata *conn, z_stream *z) -{ - struct SessionHandle *data = conn->data; - if(z->msg) - failf (data, "Error while processing content unencoding: %s", - z->msg); - else - failf (data, "Error while processing content unencoding: " - "Unknown failure within decompression software."); - - return CURLE_BAD_CONTENT_ENCODING; -} - -static CURLcode -exit_zlib(z_stream *z, zlibInitState *zlib_init, CURLcode result) -{ - inflateEnd(z); - *zlib_init = ZLIB_UNINIT; - return result; -} - -static CURLcode -inflate_stream(struct connectdata *conn, - struct SingleRequest *k) -{ - int allow_restart = 1; - z_stream *z = &k->z; /* zlib state structure */ - uInt nread = z->avail_in; - Bytef *orig_in = z->next_in; - int status; /* zlib status */ - CURLcode result = CURLE_OK; /* Curl_client_write status */ - char *decomp; /* Put the decompressed data here. */ - - /* Dynamically allocate a buffer for decompression because it's uncommonly - large to hold on the stack */ - decomp = malloc(DSIZ); - if(decomp == NULL) { - return exit_zlib(z, &k->zlib_init, CURLE_OUT_OF_MEMORY); - } - - /* because the buffer size is fixed, iteratively decompress and transfer to - the client via client_write. */ - for(;;) { - /* (re)set buffer for decompressed output for every iteration */ - z->next_out = (Bytef *)decomp; - z->avail_out = DSIZ; - - status = inflate(z, Z_SYNC_FLUSH); - if(status == Z_OK || status == Z_STREAM_END) { - allow_restart = 0; - if((DSIZ - z->avail_out) && (!k->ignorebody)) { - result = Curl_client_write(conn, CLIENTWRITE_BODY, decomp, - DSIZ - z->avail_out); - /* if !CURLE_OK, clean up, return */ - if(result) { - free(decomp); - return exit_zlib(z, &k->zlib_init, result); - } - } - - /* Done? clean up, return */ - if(status == Z_STREAM_END) { - free(decomp); - if(inflateEnd(z) == Z_OK) - return exit_zlib(z, &k->zlib_init, result); - else - return exit_zlib(z, &k->zlib_init, process_zlib_error(conn, z)); - } - - /* Done with these bytes, exit */ - - /* status is always Z_OK at this point! */ - if(z->avail_in == 0) { - free(decomp); - return result; - } - } - else if(allow_restart && status == Z_DATA_ERROR) { - /* some servers seem to not generate zlib headers, so this is an attempt - to fix and continue anyway */ - - (void) inflateEnd(z); /* don't care about the return code */ - if(inflateInit2(z, -MAX_WBITS) != Z_OK) { - free(decomp); - return exit_zlib(z, &k->zlib_init, process_zlib_error(conn, z)); - } - z->next_in = orig_in; - z->avail_in = nread; - allow_restart = 0; - continue; - } - else { /* Error; exit loop, handle below */ - free(decomp); - return exit_zlib(z, &k->zlib_init, process_zlib_error(conn, z)); - } - } - /* Will never get here */ -} - -CURLcode -Curl_unencode_deflate_write(struct connectdata *conn, - struct SingleRequest *k, - ssize_t nread) -{ - z_stream *z = &k->z; /* zlib state structure */ - - /* Initialize zlib? */ - if(k->zlib_init == ZLIB_UNINIT) { - memset(z, 0, sizeof(z_stream)); - z->zalloc = (alloc_func)zalloc_cb; - z->zfree = (free_func)zfree_cb; - - if(inflateInit(z) != Z_OK) - return process_zlib_error(conn, z); - k->zlib_init = ZLIB_INIT; - } - - /* Set the compressed input when this function is called */ - z->next_in = (Bytef *)k->str; - z->avail_in = (uInt)nread; - - /* Now uncompress the data */ - return inflate_stream(conn, k); -} - -#ifdef OLD_ZLIB_SUPPORT -/* Skip over the gzip header */ -static enum { - GZIP_OK, - GZIP_BAD, - GZIP_UNDERFLOW -} check_gzip_header(unsigned char const *data, ssize_t len, ssize_t *headerlen) -{ - int method, flags; - const ssize_t totallen = len; - - /* The shortest header is 10 bytes */ - if(len < 10) - return GZIP_UNDERFLOW; - - if((data[0] != GZIP_MAGIC_0) || (data[1] != GZIP_MAGIC_1)) - return GZIP_BAD; - - method = data[2]; - flags = data[3]; - - if(method != Z_DEFLATED || (flags & RESERVED) != 0) { - /* Can't handle this compression method or unknown flag */ - return GZIP_BAD; - } - - /* Skip over time, xflags, OS code and all previous bytes */ - len -= 10; - data += 10; - - if(flags & EXTRA_FIELD) { - ssize_t extra_len; - - if(len < 2) - return GZIP_UNDERFLOW; - - extra_len = (data[1] << 8) | data[0]; - - if(len < (extra_len+2)) - return GZIP_UNDERFLOW; - - len -= (extra_len + 2); - data += (extra_len + 2); - } - - if(flags & ORIG_NAME) { - /* Skip over NUL-terminated file name */ - while(len && *data) { - --len; - ++data; - } - if(!len || *data) - return GZIP_UNDERFLOW; - - /* Skip over the NUL */ - --len; - ++data; - } - - if(flags & COMMENT) { - /* Skip over NUL-terminated comment */ - while(len && *data) { - --len; - ++data; - } - if(!len || *data) - return GZIP_UNDERFLOW; - - /* Skip over the NUL */ - --len; - } - - if(flags & HEAD_CRC) { - if(len < 2) - return GZIP_UNDERFLOW; - - len -= 2; - } - - *headerlen = totallen - len; - return GZIP_OK; -} -#endif - -CURLcode -Curl_unencode_gzip_write(struct connectdata *conn, - struct SingleRequest *k, - ssize_t nread) -{ - z_stream *z = &k->z; /* zlib state structure */ - - /* Initialize zlib? */ - if(k->zlib_init == ZLIB_UNINIT) { - memset(z, 0, sizeof(z_stream)); - z->zalloc = (alloc_func)zalloc_cb; - z->zfree = (free_func)zfree_cb; - - if(strcmp(zlibVersion(), "1.2.0.4") >= 0) { - /* zlib ver. >= 1.2.0.4 supports transparent gzip decompressing */ - if(inflateInit2(z, MAX_WBITS+32) != Z_OK) { - return process_zlib_error(conn, z); - } - k->zlib_init = ZLIB_INIT_GZIP; /* Transparent gzip decompress state */ - } - else { - /* we must parse the gzip header ourselves */ - if(inflateInit2(z, -MAX_WBITS) != Z_OK) { - return process_zlib_error(conn, z); - } - k->zlib_init = ZLIB_INIT; /* Initial call state */ - } - } - - if(k->zlib_init == ZLIB_INIT_GZIP) { - /* Let zlib handle the gzip decompression entirely */ - z->next_in = (Bytef *)k->str; - z->avail_in = (uInt)nread; - /* Now uncompress the data */ - return inflate_stream(conn, k); - } - -#ifndef OLD_ZLIB_SUPPORT - /* Support for old zlib versions is compiled away and we are running with - an old version, so return an error. */ - return exit_zlib(z, &k->zlib_init, CURLE_FUNCTION_NOT_FOUND); - -#else - /* This next mess is to get around the potential case where there isn't - * enough data passed in to skip over the gzip header. If that happens, we - * malloc a block and copy what we have then wait for the next call. If - * there still isn't enough (this is definitely a worst-case scenario), we - * make the block bigger, copy the next part in and keep waiting. - * - * This is only required with zlib versions < 1.2.0.4 as newer versions - * can handle the gzip header themselves. - */ - - switch (k->zlib_init) { - /* Skip over gzip header? */ - case ZLIB_INIT: - { - /* Initial call state */ - ssize_t hlen; - - switch (check_gzip_header((unsigned char *)k->str, nread, &hlen)) { - case GZIP_OK: - z->next_in = (Bytef *)k->str + hlen; - z->avail_in = (uInt)(nread - hlen); - k->zlib_init = ZLIB_GZIP_INFLATING; /* Inflating stream state */ - break; - - case GZIP_UNDERFLOW: - /* We need more data so we can find the end of the gzip header. It's - * possible that the memory block we malloc here will never be freed if - * the transfer abruptly aborts after this point. Since it's unlikely - * that circumstances will be right for this code path to be followed in - * the first place, and it's even more unlikely for a transfer to fail - * immediately afterwards, it should seldom be a problem. - */ - z->avail_in = (uInt)nread; - z->next_in = malloc(z->avail_in); - if(z->next_in == NULL) { - return exit_zlib(z, &k->zlib_init, CURLE_OUT_OF_MEMORY); - } - memcpy(z->next_in, k->str, z->avail_in); - k->zlib_init = ZLIB_GZIP_HEADER; /* Need more gzip header data state */ - /* We don't have any data to inflate yet */ - return CURLE_OK; - - case GZIP_BAD: - default: - return exit_zlib(z, &k->zlib_init, process_zlib_error(conn, z)); - } - - } - break; - - case ZLIB_GZIP_HEADER: - { - /* Need more gzip header data state */ - ssize_t hlen; - unsigned char *oldblock = z->next_in; - - z->avail_in += (uInt)nread; - z->next_in = realloc(z->next_in, z->avail_in); - if(z->next_in == NULL) { - free(oldblock); - return exit_zlib(z, &k->zlib_init, CURLE_OUT_OF_MEMORY); - } - /* Append the new block of data to the previous one */ - memcpy(z->next_in + z->avail_in - nread, k->str, nread); - - switch (check_gzip_header(z->next_in, z->avail_in, &hlen)) { - case GZIP_OK: - /* This is the zlib stream data */ - free(z->next_in); - /* Don't point into the malloced block since we just freed it */ - z->next_in = (Bytef *)k->str + hlen + nread - z->avail_in; - z->avail_in = (uInt)(z->avail_in - hlen); - k->zlib_init = ZLIB_GZIP_INFLATING; /* Inflating stream state */ - break; - - case GZIP_UNDERFLOW: - /* We still don't have any data to inflate! */ - return CURLE_OK; - - case GZIP_BAD: - default: - free(z->next_in); - return exit_zlib(z, &k->zlib_init, process_zlib_error(conn, z)); - } - - } - break; - - case ZLIB_GZIP_INFLATING: - default: - /* Inflating stream state */ - z->next_in = (Bytef *)k->str; - z->avail_in = (uInt)nread; - break; - } - - if(z->avail_in == 0) { - /* We don't have any data to inflate; wait until next time */ - return CURLE_OK; - } - - /* We've parsed the header, now uncompress the data */ - return inflate_stream(conn, k); -#endif -} - -void Curl_unencode_cleanup(struct connectdata *conn) -{ - struct SessionHandle *data = conn->data; - struct SingleRequest *k = &data->req; - z_stream *z = &k->z; - if(k->zlib_init != ZLIB_UNINIT) - (void) exit_zlib(z, &k->zlib_init, CURLE_OK); -} - -#endif /* HAVE_LIBZ */ |