2002-09-03 15:52:59 +04:00
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/***************************************************************************
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2003-04-11 20:31:18 +04:00
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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2002-09-03 02:31:18 +04:00
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* \___|\___/|_| \_\_____|
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*
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2018-07-12 23:46:15 +03:00
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* Copyright (C) 1998 - 2018, Daniel Stenberg, <daniel@haxx.se>, et al.
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2002-09-03 02:31:18 +04:00
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*
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2002-09-03 15:52:59 +04:00
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* This software is licensed as described in the file COPYING, which
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* you should have received as part of this distribution. The terms
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2016-02-03 02:19:02 +03:00
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* are also available at https://curl.haxx.se/docs/copyright.html.
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2003-04-11 20:31:18 +04:00
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*
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2002-09-03 02:31:18 +04:00
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* You may opt to use, copy, modify, merge, publish, distribute and/or sell
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* copies of the Software, and permit persons to whom the Software is
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2002-09-03 15:52:59 +04:00
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* furnished to do so, under the terms of the COPYING file.
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2002-09-03 02:31:18 +04:00
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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2002-09-03 15:52:59 +04:00
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***************************************************************************/
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2002-09-03 02:31:18 +04:00
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2013-01-06 22:06:49 +04:00
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#include "curl_setup.h"
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2002-09-03 02:31:18 +04:00
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2013-01-04 05:50:28 +04:00
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#include "urldata.h"
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2002-09-03 02:31:18 +04:00
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#include <curl/curl.h>
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2017-11-05 17:09:48 +03:00
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#include <stddef.h>
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2017-11-13 16:20:41 +03:00
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#ifdef HAVE_ZLIB_H
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#include <zlib.h>
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#ifdef __SYMBIAN32__
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/* zlib pollutes the namespace with this definition */
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#undef WIN32
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#endif
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#endif
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#ifdef HAVE_BROTLI
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#include <brotli/decode.h>
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#endif
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2013-01-04 05:50:28 +04:00
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#include "sendf.h"
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2017-11-05 17:09:48 +03:00
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#include "http.h"
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2013-01-04 05:50:28 +04:00
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#include "content_encoding.h"
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2016-11-07 12:55:25 +03:00
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#include "strdup.h"
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2017-11-05 17:09:48 +03:00
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#include "strcase.h"
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2009-04-21 15:46:16 +04:00
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#include "curl_memory.h"
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2013-01-04 05:50:28 +04:00
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#include "memdebug.h"
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2002-09-03 02:31:18 +04:00
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2017-11-05 17:09:48 +03:00
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#define CONTENT_ENCODING_DEFAULT "identity"
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#ifndef CURL_DISABLE_HTTP
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2017-11-05 17:28:16 +03:00
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#define DSIZ CURL_MAX_WRITE_SIZE /* buffer size for decompressed data */
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2017-11-05 17:09:48 +03:00
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#ifdef HAVE_LIBZ
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2004-10-28 01:46:11 +04:00
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/* Comment this out if zlib is always going to be at least ver. 1.2.0.4
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(doing so will reduce code size slightly). */
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#define OLD_ZLIB_SUPPORT 1
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2003-04-11 12:49:20 +04:00
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#define GZIP_MAGIC_0 0x1f
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#define GZIP_MAGIC_1 0x8b
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/* gzip flag byte */
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#define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */
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#define HEAD_CRC 0x02 /* bit 1 set: header CRC present */
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#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
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#define ORIG_NAME 0x08 /* bit 3 set: original file name present */
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#define COMMENT 0x10 /* bit 4 set: file comment present */
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#define RESERVED 0xE0 /* bits 5..7: reserved */
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2002-09-03 02:31:18 +04:00
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2017-11-05 17:09:48 +03:00
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typedef enum {
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2018-07-12 23:46:15 +03:00
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ZLIB_UNINIT, /* uninitialized */
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ZLIB_INIT, /* initialized */
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ZLIB_INFLATING, /* inflating started. */
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ZLIB_EXTERNAL_TRAILER, /* reading external trailer */
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ZLIB_GZIP_HEADER, /* reading gzip header */
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ZLIB_GZIP_INFLATING, /* inflating gzip stream */
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ZLIB_INIT_GZIP /* initialized in transparent gzip mode */
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2017-11-05 17:09:48 +03:00
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} zlibInitState;
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/* Writer parameters. */
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typedef struct {
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2017-12-20 18:02:42 +03:00
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zlibInitState zlib_init; /* zlib init state */
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uInt trailerlen; /* Remaining trailer byte count. */
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2017-11-05 17:09:48 +03:00
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z_stream z; /* State structure for zlib. */
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} zlib_params;
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2011-08-21 15:15:34 +04:00
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static voidpf
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zalloc_cb(voidpf opaque, unsigned int items, unsigned int size)
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{
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(void) opaque;
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/* not a typo, keep it calloc() */
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return (voidpf) calloc(items, size);
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}
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static void
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zfree_cb(voidpf opaque, voidpf ptr)
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{
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(void) opaque;
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free(ptr);
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}
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2002-09-03 02:31:18 +04:00
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static CURLcode
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2006-08-20 01:18:36 +04:00
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process_zlib_error(struct connectdata *conn, z_stream *z)
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2002-09-03 02:31:18 +04:00
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{
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2016-06-21 16:47:12 +03:00
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struct Curl_easy *data = conn->data;
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2007-11-05 12:45:09 +03:00
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if(z->msg)
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2016-12-14 01:34:59 +03:00
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failf(data, "Error while processing content unencoding: %s",
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z->msg);
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2002-09-03 02:31:18 +04:00
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else
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2016-12-14 01:34:59 +03:00
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failf(data, "Error while processing content unencoding: "
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"Unknown failure within decompression software.");
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2002-09-03 02:31:18 +04:00
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return CURLE_BAD_CONTENT_ENCODING;
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}
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static CURLcode
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2017-11-05 17:09:48 +03:00
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exit_zlib(struct connectdata *conn,
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z_stream *z, zlibInitState *zlib_init, CURLcode result)
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2002-09-03 02:31:18 +04:00
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{
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2017-11-05 17:09:48 +03:00
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if(*zlib_init == ZLIB_GZIP_HEADER)
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Curl_safefree(z->next_in);
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if(*zlib_init != ZLIB_UNINIT) {
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if(inflateEnd(z) != Z_OK && result == CURLE_OK)
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result = process_zlib_error(conn, z);
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*zlib_init = ZLIB_UNINIT;
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}
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2002-09-03 02:31:18 +04:00
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return result;
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}
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2017-12-20 18:02:42 +03:00
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static CURLcode process_trailer(struct connectdata *conn, zlib_params *zp)
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{
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z_stream *z = &zp->z;
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CURLcode result = CURLE_OK;
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uInt len = z->avail_in < zp->trailerlen? z->avail_in: zp->trailerlen;
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/* Consume expected trailer bytes. Terminate stream if exhausted.
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Issue an error if unexpected bytes follow. */
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zp->trailerlen -= len;
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z->avail_in -= len;
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z->next_in += len;
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if(z->avail_in)
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result = CURLE_WRITE_ERROR;
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if(result || !zp->trailerlen)
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result = exit_zlib(conn, z, &zp->zlib_init, result);
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else {
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2018-07-12 23:46:15 +03:00
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/* Only occurs for gzip with zlib < 1.2.0.4 or raw deflate. */
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zp->zlib_init = ZLIB_EXTERNAL_TRAILER;
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2017-12-20 18:02:42 +03:00
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}
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return result;
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}
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static CURLcode inflate_stream(struct connectdata *conn,
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contenc_writer *writer, zlibInitState started)
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2002-09-03 02:31:18 +04:00
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{
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2017-11-05 17:09:48 +03:00
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zlib_params *zp = (zlib_params *) &writer->params;
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z_stream *z = &zp->z; /* zlib state structure */
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2006-04-26 00:49:40 +04:00
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uInt nread = z->avail_in;
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Bytef *orig_in = z->next_in;
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2017-12-20 18:02:42 +03:00
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bool done = FALSE;
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2004-02-15 16:58:57 +03:00
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CURLcode result = CURLE_OK; /* Curl_client_write status */
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2004-10-28 01:46:11 +04:00
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char *decomp; /* Put the decompressed data here. */
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2003-04-11 20:31:18 +04:00
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2017-12-20 18:02:42 +03:00
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/* Check state. */
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if(zp->zlib_init != ZLIB_INIT &&
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zp->zlib_init != ZLIB_INFLATING &&
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zp->zlib_init != ZLIB_INIT_GZIP &&
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zp->zlib_init != ZLIB_GZIP_INFLATING)
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return exit_zlib(conn, z, &zp->zlib_init, CURLE_WRITE_ERROR);
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2004-10-28 01:46:11 +04:00
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/* Dynamically allocate a buffer for decompression because it's uncommonly
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large to hold on the stack */
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2008-09-06 09:29:05 +04:00
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decomp = malloc(DSIZ);
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2017-12-20 18:02:42 +03:00
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if(decomp == NULL)
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2017-11-05 17:09:48 +03:00
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return exit_zlib(conn, z, &zp->zlib_init, CURLE_OUT_OF_MEMORY);
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2002-09-03 02:31:18 +04:00
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2004-10-28 01:46:11 +04:00
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/* because the buffer size is fixed, iteratively decompress and transfer to
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2017-12-20 18:02:42 +03:00
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the client via downstream_write function. */
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while(!done) {
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2018-06-02 23:52:56 +03:00
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int status; /* zlib status */
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2017-12-20 18:02:42 +03:00
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done = TRUE;
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2017-11-07 08:46:59 +03:00
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2002-09-03 02:31:18 +04:00
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/* (re)set buffer for decompressed output for every iteration */
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2017-11-05 17:09:48 +03:00
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z->next_out = (Bytef *) decomp;
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2002-09-03 02:31:18 +04:00
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z->avail_out = DSIZ;
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2018-05-25 05:08:04 +03:00
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#ifdef Z_BLOCK
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/* Z_BLOCK is only available in zlib ver. >= 1.2.0.5 */
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2017-12-20 18:02:42 +03:00
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status = inflate(z, Z_BLOCK);
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2018-05-25 05:08:04 +03:00
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#else
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/* fallback for zlib ver. < 1.2.0.5 */
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status = inflate(z, Z_SYNC_FLUSH);
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#endif
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2017-12-20 18:02:42 +03:00
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/* Flush output data if some. */
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if(z->avail_out != DSIZ) {
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if(status == Z_OK || status == Z_STREAM_END) {
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zp->zlib_init = started; /* Data started. */
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result = Curl_unencode_write(conn, writer->downstream, decomp,
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DSIZ - z->avail_out);
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if(result) {
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exit_zlib(conn, z, &zp->zlib_init, result);
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break;
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}
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2002-09-03 02:31:18 +04:00
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}
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}
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2017-12-20 18:02:42 +03:00
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/* Dispatch by inflate() status. */
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switch(status) {
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case Z_OK:
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/* Always loop: there may be unflushed latched data in zlib state. */
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done = FALSE;
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break;
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case Z_BUF_ERROR:
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/* No more data to flush: just exit loop. */
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break;
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case Z_STREAM_END:
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result = process_trailer(conn, zp);
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break;
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case Z_DATA_ERROR:
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2006-04-26 00:49:40 +04:00
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/* some servers seem to not generate zlib headers, so this is an attempt
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to fix and continue anyway */
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2017-12-20 18:02:42 +03:00
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if(zp->zlib_init == ZLIB_INIT) {
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/* Do not use inflateReset2(): only available since zlib 1.2.3.4. */
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(void) inflateEnd(z); /* don't care about the return code */
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if(inflateInit2(z, -MAX_WBITS) == Z_OK) {
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z->next_in = orig_in;
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z->avail_in = nread;
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zp->zlib_init = ZLIB_INFLATING;
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2018-07-12 23:46:15 +03:00
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zp->trailerlen = 4; /* Tolerate up to 4 unknown trailer bytes. */
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2017-12-20 18:02:42 +03:00
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done = FALSE;
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break;
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}
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zp->zlib_init = ZLIB_UNINIT; /* inflateEnd() already called. */
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2006-04-26 00:49:40 +04:00
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}
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2017-12-20 18:02:42 +03:00
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/* FALLTHROUGH */
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default:
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result = exit_zlib(conn, z, &zp->zlib_init, process_zlib_error(conn, z));
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break;
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2002-09-03 02:31:18 +04:00
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}
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}
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2017-12-20 18:02:42 +03:00
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free(decomp);
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/* We're about to leave this call so the `nread' data bytes won't be seen
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again. If we are in a state that would wrongly allow restart in raw mode
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at the next call, assume output has already started. */
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if(nread && zp->zlib_init == ZLIB_INIT)
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zp->zlib_init = started; /* Cannot restart anymore. */
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return result;
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2002-09-03 02:31:18 +04:00
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}
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2003-04-11 12:49:20 +04:00
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2017-11-05 17:09:48 +03:00
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/* Deflate handler. */
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static CURLcode deflate_init_writer(struct connectdata *conn,
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contenc_writer *writer)
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2004-10-28 01:46:11 +04:00
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{
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2017-11-05 17:09:48 +03:00
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zlib_params *zp = (zlib_params *) &writer->params;
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z_stream *z = &zp->z; /* zlib state structure */
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2004-10-28 01:46:11 +04:00
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2017-11-05 17:09:48 +03:00
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if(!writer->downstream)
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return CURLE_WRITE_ERROR;
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2011-08-21 15:15:34 +04:00
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2017-11-05 17:09:48 +03:00
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/* Initialize zlib */
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z->zalloc = (alloc_func) zalloc_cb;
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z->zfree = (free_func) zfree_cb;
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if(inflateInit(z) != Z_OK)
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return process_zlib_error(conn, z);
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zp->zlib_init = ZLIB_INIT;
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return CURLE_OK;
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}
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static CURLcode deflate_unencode_write(struct connectdata *conn,
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contenc_writer *writer,
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const char *buf, size_t nbytes)
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{
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zlib_params *zp = (zlib_params *) &writer->params;
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z_stream *z = &zp->z; /* zlib state structure */
|
2004-10-28 01:46:11 +04:00
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/* Set the compressed input when this function is called */
|
2017-11-05 17:09:48 +03:00
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z->next_in = (Bytef *) buf;
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z->avail_in = (uInt) nbytes;
|
2004-10-28 01:46:11 +04:00
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|
2018-07-12 23:46:15 +03:00
|
|
|
if(zp->zlib_init == ZLIB_EXTERNAL_TRAILER)
|
|
|
|
return process_trailer(conn, zp);
|
|
|
|
|
2004-10-28 01:46:11 +04:00
|
|
|
/* Now uncompress the data */
|
2017-12-20 18:02:42 +03:00
|
|
|
return inflate_stream(conn, writer, ZLIB_INFLATING);
|
2017-11-05 17:09:48 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
static void deflate_close_writer(struct connectdata *conn,
|
|
|
|
contenc_writer *writer)
|
|
|
|
{
|
|
|
|
zlib_params *zp = (zlib_params *) &writer->params;
|
|
|
|
z_stream *z = &zp->z; /* zlib state structure */
|
|
|
|
|
|
|
|
exit_zlib(conn, z, &zp->zlib_init, CURLE_OK);
|
|
|
|
}
|
|
|
|
|
|
|
|
static const content_encoding deflate_encoding = {
|
|
|
|
"deflate",
|
|
|
|
NULL,
|
|
|
|
deflate_init_writer,
|
|
|
|
deflate_unencode_write,
|
|
|
|
deflate_close_writer,
|
|
|
|
sizeof(zlib_params)
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
/* Gzip handler. */
|
|
|
|
static CURLcode gzip_init_writer(struct connectdata *conn,
|
|
|
|
contenc_writer *writer)
|
|
|
|
{
|
|
|
|
zlib_params *zp = (zlib_params *) &writer->params;
|
|
|
|
z_stream *z = &zp->z; /* zlib state structure */
|
|
|
|
|
|
|
|
if(!writer->downstream)
|
|
|
|
return CURLE_WRITE_ERROR;
|
|
|
|
|
|
|
|
/* Initialize zlib */
|
|
|
|
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);
|
|
|
|
}
|
|
|
|
zp->zlib_init = ZLIB_INIT_GZIP; /* Transparent gzip decompress state */
|
|
|
|
}
|
|
|
|
else {
|
2017-12-20 18:02:42 +03:00
|
|
|
/* we must parse the gzip header and trailer ourselves */
|
2017-11-05 17:09:48 +03:00
|
|
|
if(inflateInit2(z, -MAX_WBITS) != Z_OK) {
|
|
|
|
return process_zlib_error(conn, z);
|
|
|
|
}
|
2017-12-20 18:02:42 +03:00
|
|
|
zp->trailerlen = 8; /* A CRC-32 and a 32-bit input size (RFC 1952, 2.2) */
|
|
|
|
zp->zlib_init = ZLIB_INIT; /* Initial call state */
|
2017-11-05 17:09:48 +03:00
|
|
|
}
|
|
|
|
|
|
|
|
return CURLE_OK;
|
2004-10-28 01:46:11 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef OLD_ZLIB_SUPPORT
|
2003-04-11 12:49:20 +04:00
|
|
|
/* Skip over the gzip header */
|
|
|
|
static enum {
|
|
|
|
GZIP_OK,
|
|
|
|
GZIP_BAD,
|
|
|
|
GZIP_UNDERFLOW
|
2003-04-11 20:31:18 +04:00
|
|
|
} check_gzip_header(unsigned char const *data, ssize_t len, ssize_t *headerlen)
|
2003-04-11 12:49:20 +04:00
|
|
|
{
|
|
|
|
int method, flags;
|
|
|
|
const ssize_t totallen = len;
|
|
|
|
|
|
|
|
/* The shortest header is 10 bytes */
|
2007-11-05 12:45:09 +03:00
|
|
|
if(len < 10)
|
2003-04-11 12:49:20 +04:00
|
|
|
return GZIP_UNDERFLOW;
|
|
|
|
|
2007-11-05 12:45:09 +03:00
|
|
|
if((data[0] != GZIP_MAGIC_0) || (data[1] != GZIP_MAGIC_1))
|
2003-04-11 12:49:20 +04:00
|
|
|
return GZIP_BAD;
|
|
|
|
|
|
|
|
method = data[2];
|
|
|
|
flags = data[3];
|
|
|
|
|
2007-11-05 12:45:09 +03:00
|
|
|
if(method != Z_DEFLATED || (flags & RESERVED) != 0) {
|
2003-04-11 12:49:20 +04:00
|
|
|
/* 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;
|
|
|
|
|
2007-11-05 12:45:09 +03:00
|
|
|
if(flags & EXTRA_FIELD) {
|
2003-04-11 12:49:20 +04:00
|
|
|
ssize_t extra_len;
|
|
|
|
|
2007-11-05 12:45:09 +03:00
|
|
|
if(len < 2)
|
2003-04-11 12:49:20 +04:00
|
|
|
return GZIP_UNDERFLOW;
|
|
|
|
|
|
|
|
extra_len = (data[1] << 8) | data[0];
|
|
|
|
|
2017-09-10 00:55:08 +03:00
|
|
|
if(len < (extra_len + 2))
|
2003-04-11 12:49:20 +04:00
|
|
|
return GZIP_UNDERFLOW;
|
|
|
|
|
|
|
|
len -= (extra_len + 2);
|
2004-11-30 12:44:54 +03:00
|
|
|
data += (extra_len + 2);
|
2003-04-11 12:49:20 +04:00
|
|
|
}
|
|
|
|
|
2007-11-05 12:45:09 +03:00
|
|
|
if(flags & ORIG_NAME) {
|
2003-04-11 12:49:20 +04:00
|
|
|
/* Skip over NUL-terminated file name */
|
2007-11-05 12:45:09 +03:00
|
|
|
while(len && *data) {
|
2003-04-11 12:49:20 +04:00
|
|
|
--len;
|
|
|
|
++data;
|
|
|
|
}
|
2007-11-05 12:45:09 +03:00
|
|
|
if(!len || *data)
|
2003-04-11 12:49:20 +04:00
|
|
|
return GZIP_UNDERFLOW;
|
|
|
|
|
|
|
|
/* Skip over the NUL */
|
|
|
|
--len;
|
|
|
|
++data;
|
|
|
|
}
|
|
|
|
|
2007-11-05 12:45:09 +03:00
|
|
|
if(flags & COMMENT) {
|
2003-04-11 12:49:20 +04:00
|
|
|
/* Skip over NUL-terminated comment */
|
2007-11-05 12:45:09 +03:00
|
|
|
while(len && *data) {
|
2003-04-11 12:49:20 +04:00
|
|
|
--len;
|
|
|
|
++data;
|
|
|
|
}
|
2007-11-05 12:45:09 +03:00
|
|
|
if(!len || *data)
|
2003-04-11 12:49:20 +04:00
|
|
|
return GZIP_UNDERFLOW;
|
|
|
|
|
|
|
|
/* Skip over the NUL */
|
|
|
|
--len;
|
|
|
|
}
|
|
|
|
|
2007-11-05 12:45:09 +03:00
|
|
|
if(flags & HEAD_CRC) {
|
|
|
|
if(len < 2)
|
2003-04-11 12:49:20 +04:00
|
|
|
return GZIP_UNDERFLOW;
|
|
|
|
|
|
|
|
len -= 2;
|
|
|
|
}
|
|
|
|
|
|
|
|
*headerlen = totallen - len;
|
|
|
|
return GZIP_OK;
|
|
|
|
}
|
2004-10-28 01:46:11 +04:00
|
|
|
#endif
|
2003-04-11 12:49:20 +04:00
|
|
|
|
2017-11-05 17:09:48 +03:00
|
|
|
static CURLcode gzip_unencode_write(struct connectdata *conn,
|
|
|
|
contenc_writer *writer,
|
|
|
|
const char *buf, size_t nbytes)
|
2003-04-11 12:49:20 +04:00
|
|
|
{
|
2017-11-05 17:09:48 +03:00
|
|
|
zlib_params *zp = (zlib_params *) &writer->params;
|
|
|
|
z_stream *z = &zp->z; /* zlib state structure */
|
2004-10-28 01:46:11 +04:00
|
|
|
|
2017-11-05 17:09:48 +03:00
|
|
|
if(zp->zlib_init == ZLIB_INIT_GZIP) {
|
2010-01-23 02:21:39 +03:00
|
|
|
/* Let zlib handle the gzip decompression entirely */
|
2017-11-05 17:09:48 +03:00
|
|
|
z->next_in = (Bytef *) buf;
|
|
|
|
z->avail_in = (uInt) nbytes;
|
2010-01-23 02:21:39 +03:00
|
|
|
/* Now uncompress the data */
|
2017-12-20 18:02:42 +03:00
|
|
|
return inflate_stream(conn, writer, ZLIB_INIT_GZIP);
|
2003-04-11 12:49:20 +04:00
|
|
|
}
|
|
|
|
|
2004-10-28 01:46:11 +04:00
|
|
|
#ifndef OLD_ZLIB_SUPPORT
|
|
|
|
/* Support for old zlib versions is compiled away and we are running with
|
|
|
|
an old version, so return an error. */
|
2017-11-05 17:09:48 +03:00
|
|
|
return exit_zlib(conn, z, &zp->zlib_init, CURLE_WRITE_ERROR);
|
2004-10-28 01:46:11 +04:00
|
|
|
|
|
|
|
#else
|
2003-04-11 12:49:20 +04:00
|
|
|
/* This next mess is to get around the potential case where there isn't
|
2004-05-12 11:55:05 +04:00
|
|
|
* 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.
|
2004-10-28 01:46:11 +04:00
|
|
|
*
|
|
|
|
* This is only required with zlib versions < 1.2.0.4 as newer versions
|
|
|
|
* can handle the gzip header themselves.
|
2004-05-12 11:55:05 +04:00
|
|
|
*/
|
2003-04-11 12:49:20 +04:00
|
|
|
|
2017-11-05 17:09:48 +03:00
|
|
|
switch(zp->zlib_init) {
|
2003-04-11 12:49:20 +04:00
|
|
|
/* Skip over gzip header? */
|
2004-10-28 01:46:11 +04:00
|
|
|
case ZLIB_INIT:
|
|
|
|
{
|
2003-04-11 12:49:20 +04:00
|
|
|
/* Initial call state */
|
|
|
|
ssize_t hlen;
|
|
|
|
|
2017-11-05 17:09:48 +03:00
|
|
|
switch(check_gzip_header((unsigned char *) buf, nbytes, &hlen)) {
|
2003-04-11 12:49:20 +04:00
|
|
|
case GZIP_OK:
|
2017-11-05 17:09:48 +03:00
|
|
|
z->next_in = (Bytef *) buf + hlen;
|
|
|
|
z->avail_in = (uInt) (nbytes - hlen);
|
|
|
|
zp->zlib_init = ZLIB_GZIP_INFLATING; /* Inflating stream state */
|
2003-04-11 12:49:20 +04:00
|
|
|
break;
|
|
|
|
|
|
|
|
case GZIP_UNDERFLOW:
|
2004-05-12 11:55:05 +04:00
|
|
|
/* 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.
|
|
|
|
*/
|
2017-11-05 17:09:48 +03:00
|
|
|
z->avail_in = (uInt) nbytes;
|
2003-04-11 12:49:20 +04:00
|
|
|
z->next_in = malloc(z->avail_in);
|
2007-11-05 12:45:09 +03:00
|
|
|
if(z->next_in == NULL) {
|
2017-11-05 17:09:48 +03:00
|
|
|
return exit_zlib(conn, z, &zp->zlib_init, CURLE_OUT_OF_MEMORY);
|
2003-04-11 12:49:20 +04:00
|
|
|
}
|
2017-11-05 17:09:48 +03:00
|
|
|
memcpy(z->next_in, buf, z->avail_in);
|
|
|
|
zp->zlib_init = ZLIB_GZIP_HEADER; /* Need more gzip header data state */
|
2003-04-11 12:49:20 +04:00
|
|
|
/* We don't have any data to inflate yet */
|
|
|
|
return CURLE_OK;
|
|
|
|
|
|
|
|
case GZIP_BAD:
|
|
|
|
default:
|
2017-11-05 17:09:48 +03:00
|
|
|
return exit_zlib(conn, z, &zp->zlib_init, process_zlib_error(conn, z));
|
2003-04-11 12:49:20 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
}
|
2004-10-28 01:46:11 +04:00
|
|
|
break;
|
|
|
|
|
|
|
|
case ZLIB_GZIP_HEADER:
|
|
|
|
{
|
2003-04-11 12:49:20 +04:00
|
|
|
/* Need more gzip header data state */
|
|
|
|
ssize_t hlen;
|
2017-11-05 17:09:48 +03:00
|
|
|
z->avail_in += (uInt) nbytes;
|
2016-11-07 12:55:25 +03:00
|
|
|
z->next_in = Curl_saferealloc(z->next_in, z->avail_in);
|
2007-11-05 12:45:09 +03:00
|
|
|
if(z->next_in == NULL) {
|
2017-11-05 17:09:48 +03:00
|
|
|
return exit_zlib(conn, z, &zp->zlib_init, CURLE_OUT_OF_MEMORY);
|
2003-04-11 12:49:20 +04:00
|
|
|
}
|
|
|
|
/* Append the new block of data to the previous one */
|
2017-11-05 17:09:48 +03:00
|
|
|
memcpy(z->next_in + z->avail_in - nbytes, buf, nbytes);
|
2003-04-11 12:49:20 +04:00
|
|
|
|
2016-12-14 01:34:59 +03:00
|
|
|
switch(check_gzip_header(z->next_in, z->avail_in, &hlen)) {
|
2003-04-11 12:49:20 +04:00
|
|
|
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 */
|
2017-11-05 17:09:48 +03:00
|
|
|
z->next_in = (Bytef *) buf + hlen + nbytes - z->avail_in;
|
|
|
|
z->avail_in = (uInt) (z->avail_in - hlen);
|
|
|
|
zp->zlib_init = ZLIB_GZIP_INFLATING; /* Inflating stream state */
|
2003-04-11 12:49:20 +04:00
|
|
|
break;
|
|
|
|
|
|
|
|
case GZIP_UNDERFLOW:
|
|
|
|
/* We still don't have any data to inflate! */
|
|
|
|
return CURLE_OK;
|
|
|
|
|
|
|
|
case GZIP_BAD:
|
|
|
|
default:
|
2017-11-05 17:09:48 +03:00
|
|
|
return exit_zlib(conn, z, &zp->zlib_init, process_zlib_error(conn, z));
|
2003-04-11 12:49:20 +04:00
|
|
|
}
|
|
|
|
|
|
|
|
}
|
2004-10-28 01:46:11 +04:00
|
|
|
break;
|
|
|
|
|
2018-07-12 23:46:15 +03:00
|
|
|
case ZLIB_EXTERNAL_TRAILER:
|
2017-12-20 18:02:42 +03:00
|
|
|
z->next_in = (Bytef *) buf;
|
|
|
|
z->avail_in = (uInt) nbytes;
|
|
|
|
return process_trailer(conn, zp);
|
|
|
|
|
2004-10-28 01:46:11 +04:00
|
|
|
case ZLIB_GZIP_INFLATING:
|
|
|
|
default:
|
2003-04-11 12:49:20 +04:00
|
|
|
/* Inflating stream state */
|
2017-11-05 17:09:48 +03:00
|
|
|
z->next_in = (Bytef *) buf;
|
|
|
|
z->avail_in = (uInt) nbytes;
|
2004-10-28 01:46:11 +04:00
|
|
|
break;
|
2003-04-11 12:49:20 +04:00
|
|
|
}
|
|
|
|
|
2007-11-05 12:45:09 +03:00
|
|
|
if(z->avail_in == 0) {
|
2003-04-11 12:49:20 +04:00
|
|
|
/* We don't have any data to inflate; wait until next time */
|
|
|
|
return CURLE_OK;
|
|
|
|
}
|
|
|
|
|
2004-10-28 01:46:11 +04:00
|
|
|
/* We've parsed the header, now uncompress the data */
|
2017-12-20 18:02:42 +03:00
|
|
|
return inflate_stream(conn, writer, ZLIB_GZIP_INFLATING);
|
2004-10-28 01:46:11 +04:00
|
|
|
#endif
|
2003-04-11 12:49:20 +04:00
|
|
|
}
|
2009-05-11 13:55:28 +04:00
|
|
|
|
2017-11-05 17:09:48 +03:00
|
|
|
static void gzip_close_writer(struct connectdata *conn,
|
|
|
|
contenc_writer *writer)
|
|
|
|
{
|
|
|
|
zlib_params *zp = (zlib_params *) &writer->params;
|
|
|
|
z_stream *z = &zp->z; /* zlib state structure */
|
|
|
|
|
|
|
|
exit_zlib(conn, z, &zp->zlib_init, CURLE_OK);
|
|
|
|
}
|
|
|
|
|
|
|
|
static const content_encoding gzip_encoding = {
|
|
|
|
"gzip",
|
|
|
|
"x-gzip",
|
|
|
|
gzip_init_writer,
|
|
|
|
gzip_unencode_write,
|
|
|
|
gzip_close_writer,
|
|
|
|
sizeof(zlib_params)
|
|
|
|
};
|
|
|
|
|
|
|
|
#endif /* HAVE_LIBZ */
|
|
|
|
|
|
|
|
|
2017-11-05 17:28:16 +03:00
|
|
|
#ifdef HAVE_BROTLI
|
|
|
|
|
|
|
|
/* Writer parameters. */
|
|
|
|
typedef struct {
|
|
|
|
BrotliDecoderState *br; /* State structure for brotli. */
|
|
|
|
} brotli_params;
|
|
|
|
|
|
|
|
|
|
|
|
static CURLcode brotli_map_error(BrotliDecoderErrorCode be)
|
|
|
|
{
|
|
|
|
switch(be) {
|
|
|
|
case BROTLI_DECODER_ERROR_FORMAT_EXUBERANT_NIBBLE:
|
|
|
|
case BROTLI_DECODER_ERROR_FORMAT_EXUBERANT_META_NIBBLE:
|
|
|
|
case BROTLI_DECODER_ERROR_FORMAT_SIMPLE_HUFFMAN_ALPHABET:
|
|
|
|
case BROTLI_DECODER_ERROR_FORMAT_SIMPLE_HUFFMAN_SAME:
|
|
|
|
case BROTLI_DECODER_ERROR_FORMAT_CL_SPACE:
|
|
|
|
case BROTLI_DECODER_ERROR_FORMAT_HUFFMAN_SPACE:
|
|
|
|
case BROTLI_DECODER_ERROR_FORMAT_CONTEXT_MAP_REPEAT:
|
|
|
|
case BROTLI_DECODER_ERROR_FORMAT_BLOCK_LENGTH_1:
|
|
|
|
case BROTLI_DECODER_ERROR_FORMAT_BLOCK_LENGTH_2:
|
|
|
|
case BROTLI_DECODER_ERROR_FORMAT_TRANSFORM:
|
|
|
|
case BROTLI_DECODER_ERROR_FORMAT_DICTIONARY:
|
|
|
|
case BROTLI_DECODER_ERROR_FORMAT_WINDOW_BITS:
|
|
|
|
case BROTLI_DECODER_ERROR_FORMAT_PADDING_1:
|
|
|
|
case BROTLI_DECODER_ERROR_FORMAT_PADDING_2:
|
2017-12-20 17:30:35 +03:00
|
|
|
#ifdef BROTLI_DECODER_ERROR_COMPOUND_DICTIONARY
|
2017-11-05 17:28:16 +03:00
|
|
|
case BROTLI_DECODER_ERROR_COMPOUND_DICTIONARY:
|
2017-12-20 17:30:35 +03:00
|
|
|
#endif
|
|
|
|
#ifdef BROTLI_DECODER_ERROR_DICTIONARY_NOT_SET
|
2017-11-05 17:28:16 +03:00
|
|
|
case BROTLI_DECODER_ERROR_DICTIONARY_NOT_SET:
|
2017-12-20 17:30:35 +03:00
|
|
|
#endif
|
2017-11-05 17:28:16 +03:00
|
|
|
case BROTLI_DECODER_ERROR_INVALID_ARGUMENTS:
|
|
|
|
return CURLE_BAD_CONTENT_ENCODING;
|
|
|
|
case BROTLI_DECODER_ERROR_ALLOC_CONTEXT_MODES:
|
|
|
|
case BROTLI_DECODER_ERROR_ALLOC_TREE_GROUPS:
|
|
|
|
case BROTLI_DECODER_ERROR_ALLOC_CONTEXT_MAP:
|
|
|
|
case BROTLI_DECODER_ERROR_ALLOC_RING_BUFFER_1:
|
|
|
|
case BROTLI_DECODER_ERROR_ALLOC_RING_BUFFER_2:
|
|
|
|
case BROTLI_DECODER_ERROR_ALLOC_BLOCK_TYPE_TREES:
|
|
|
|
return CURLE_OUT_OF_MEMORY;
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
return CURLE_WRITE_ERROR;
|
|
|
|
}
|
|
|
|
|
|
|
|
static CURLcode brotli_init_writer(struct connectdata *conn,
|
|
|
|
contenc_writer *writer)
|
|
|
|
{
|
|
|
|
brotli_params *bp = (brotli_params *) &writer->params;
|
|
|
|
|
|
|
|
(void) conn;
|
|
|
|
|
|
|
|
if(!writer->downstream)
|
|
|
|
return CURLE_WRITE_ERROR;
|
|
|
|
|
|
|
|
bp->br = BrotliDecoderCreateInstance(NULL, NULL, NULL);
|
|
|
|
return bp->br? CURLE_OK: CURLE_OUT_OF_MEMORY;
|
|
|
|
}
|
|
|
|
|
|
|
|
static CURLcode brotli_unencode_write(struct connectdata *conn,
|
|
|
|
contenc_writer *writer,
|
|
|
|
const char *buf, size_t nbytes)
|
|
|
|
{
|
|
|
|
brotli_params *bp = (brotli_params *) &writer->params;
|
|
|
|
const uint8_t *src = (const uint8_t *) buf;
|
|
|
|
char *decomp;
|
|
|
|
uint8_t *dst;
|
|
|
|
size_t dstleft;
|
|
|
|
CURLcode result = CURLE_OK;
|
2017-12-26 00:17:08 +03:00
|
|
|
BrotliDecoderResult r = BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT;
|
2017-11-05 17:28:16 +03:00
|
|
|
|
|
|
|
if(!bp->br)
|
|
|
|
return CURLE_WRITE_ERROR; /* Stream already ended. */
|
|
|
|
|
|
|
|
decomp = malloc(DSIZ);
|
|
|
|
if(!decomp)
|
|
|
|
return CURLE_OUT_OF_MEMORY;
|
|
|
|
|
2017-12-26 00:17:08 +03:00
|
|
|
while((nbytes || r == BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT) &&
|
|
|
|
result == CURLE_OK) {
|
2017-11-05 17:28:16 +03:00
|
|
|
dst = (uint8_t *) decomp;
|
|
|
|
dstleft = DSIZ;
|
|
|
|
r = BrotliDecoderDecompressStream(bp->br,
|
|
|
|
&nbytes, &src, &dstleft, &dst, NULL);
|
|
|
|
result = Curl_unencode_write(conn, writer->downstream,
|
|
|
|
decomp, DSIZ - dstleft);
|
|
|
|
if(result)
|
|
|
|
break;
|
|
|
|
switch(r) {
|
|
|
|
case BROTLI_DECODER_RESULT_NEEDS_MORE_OUTPUT:
|
|
|
|
case BROTLI_DECODER_RESULT_NEEDS_MORE_INPUT:
|
|
|
|
break;
|
|
|
|
case BROTLI_DECODER_RESULT_SUCCESS:
|
|
|
|
BrotliDecoderDestroyInstance(bp->br);
|
|
|
|
bp->br = NULL;
|
|
|
|
if(nbytes)
|
|
|
|
result = CURLE_WRITE_ERROR;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
result = brotli_map_error(BrotliDecoderGetErrorCode(bp->br));
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
free(decomp);
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void brotli_close_writer(struct connectdata *conn,
|
|
|
|
contenc_writer *writer)
|
|
|
|
{
|
|
|
|
brotli_params *bp = (brotli_params *) &writer->params;
|
|
|
|
|
|
|
|
(void) conn;
|
|
|
|
|
|
|
|
if(bp->br) {
|
|
|
|
BrotliDecoderDestroyInstance(bp->br);
|
|
|
|
bp->br = NULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static const content_encoding brotli_encoding = {
|
|
|
|
"br",
|
|
|
|
NULL,
|
|
|
|
brotli_init_writer,
|
|
|
|
brotli_unencode_write,
|
|
|
|
brotli_close_writer,
|
|
|
|
sizeof(brotli_params)
|
|
|
|
};
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
2017-11-05 17:09:48 +03:00
|
|
|
/* Identity handler. */
|
|
|
|
static CURLcode identity_init_writer(struct connectdata *conn,
|
|
|
|
contenc_writer *writer)
|
|
|
|
{
|
|
|
|
(void) conn;
|
|
|
|
return writer->downstream? CURLE_OK: CURLE_WRITE_ERROR;
|
|
|
|
}
|
|
|
|
|
|
|
|
static CURLcode identity_unencode_write(struct connectdata *conn,
|
|
|
|
contenc_writer *writer,
|
|
|
|
const char *buf, size_t nbytes)
|
|
|
|
{
|
|
|
|
return Curl_unencode_write(conn, writer->downstream, buf, nbytes);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void identity_close_writer(struct connectdata *conn,
|
|
|
|
contenc_writer *writer)
|
|
|
|
{
|
|
|
|
(void) conn;
|
|
|
|
(void) writer;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const content_encoding identity_encoding = {
|
|
|
|
"identity",
|
2018-02-08 21:23:22 +03:00
|
|
|
"none",
|
2017-11-05 17:09:48 +03:00
|
|
|
identity_init_writer,
|
|
|
|
identity_unencode_write,
|
|
|
|
identity_close_writer,
|
|
|
|
0
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
/* supported content encodings table. */
|
|
|
|
static const content_encoding * const encodings[] = {
|
|
|
|
&identity_encoding,
|
|
|
|
#ifdef HAVE_LIBZ
|
|
|
|
&deflate_encoding,
|
|
|
|
&gzip_encoding,
|
2017-11-05 17:28:16 +03:00
|
|
|
#endif
|
|
|
|
#ifdef HAVE_BROTLI
|
|
|
|
&brotli_encoding,
|
2017-11-05 17:09:48 +03:00
|
|
|
#endif
|
|
|
|
NULL
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
/* Return a list of comma-separated names of supported encodings. */
|
|
|
|
char *Curl_all_content_encodings(void)
|
|
|
|
{
|
|
|
|
size_t len = 0;
|
|
|
|
const content_encoding * const *cep;
|
|
|
|
const content_encoding *ce;
|
|
|
|
char *ace;
|
|
|
|
|
|
|
|
for(cep = encodings; *cep; cep++) {
|
|
|
|
ce = *cep;
|
|
|
|
if(!strcasecompare(ce->name, CONTENT_ENCODING_DEFAULT))
|
|
|
|
len += strlen(ce->name) + 2;
|
|
|
|
}
|
|
|
|
|
|
|
|
if(!len)
|
|
|
|
return strdup(CONTENT_ENCODING_DEFAULT);
|
|
|
|
|
|
|
|
ace = malloc(len);
|
|
|
|
if(ace) {
|
2018-06-02 23:52:56 +03:00
|
|
|
char *p = ace;
|
2017-11-05 17:09:48 +03:00
|
|
|
for(cep = encodings; *cep; cep++) {
|
|
|
|
ce = *cep;
|
|
|
|
if(!strcasecompare(ce->name, CONTENT_ENCODING_DEFAULT)) {
|
|
|
|
strcpy(p, ce->name);
|
|
|
|
p += strlen(p);
|
|
|
|
*p++ = ',';
|
|
|
|
*p++ = ' ';
|
|
|
|
}
|
|
|
|
}
|
|
|
|
p[-2] = '\0';
|
|
|
|
}
|
|
|
|
|
|
|
|
return ace;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/* Real client writer: no downstream. */
|
|
|
|
static CURLcode client_init_writer(struct connectdata *conn,
|
|
|
|
contenc_writer *writer)
|
|
|
|
{
|
|
|
|
(void) conn;
|
|
|
|
return writer->downstream? CURLE_WRITE_ERROR: CURLE_OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
static CURLcode client_unencode_write(struct connectdata *conn,
|
|
|
|
contenc_writer *writer,
|
|
|
|
const char *buf, size_t nbytes)
|
|
|
|
{
|
|
|
|
struct Curl_easy *data = conn->data;
|
|
|
|
struct SingleRequest *k = &data->req;
|
|
|
|
|
|
|
|
(void) writer;
|
|
|
|
|
|
|
|
if(!nbytes || k->ignorebody)
|
|
|
|
return CURLE_OK;
|
|
|
|
|
|
|
|
return Curl_client_write(conn, CLIENTWRITE_BODY, (char *) buf, nbytes);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void client_close_writer(struct connectdata *conn,
|
|
|
|
contenc_writer *writer)
|
|
|
|
{
|
|
|
|
(void) conn;
|
|
|
|
(void) writer;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const content_encoding client_encoding = {
|
|
|
|
NULL,
|
|
|
|
NULL,
|
|
|
|
client_init_writer,
|
|
|
|
client_unencode_write,
|
|
|
|
client_close_writer,
|
|
|
|
0
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
|
|
/* Deferred error dummy writer. */
|
|
|
|
static CURLcode error_init_writer(struct connectdata *conn,
|
|
|
|
contenc_writer *writer)
|
|
|
|
{
|
|
|
|
(void) conn;
|
|
|
|
return writer->downstream? CURLE_OK: CURLE_WRITE_ERROR;
|
|
|
|
}
|
|
|
|
|
|
|
|
static CURLcode error_unencode_write(struct connectdata *conn,
|
|
|
|
contenc_writer *writer,
|
|
|
|
const char *buf, size_t nbytes)
|
|
|
|
{
|
|
|
|
char *all = Curl_all_content_encodings();
|
|
|
|
|
|
|
|
(void) writer;
|
|
|
|
(void) buf;
|
|
|
|
(void) nbytes;
|
|
|
|
|
|
|
|
if(!all)
|
|
|
|
return CURLE_OUT_OF_MEMORY;
|
|
|
|
failf(conn->data, "Unrecognized content encoding type. "
|
|
|
|
"libcurl understands %s content encodings.", all);
|
|
|
|
free(all);
|
|
|
|
return CURLE_BAD_CONTENT_ENCODING;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void error_close_writer(struct connectdata *conn,
|
|
|
|
contenc_writer *writer)
|
|
|
|
{
|
|
|
|
(void) conn;
|
|
|
|
(void) writer;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const content_encoding error_encoding = {
|
|
|
|
NULL,
|
|
|
|
NULL,
|
|
|
|
error_init_writer,
|
|
|
|
error_unencode_write,
|
|
|
|
error_close_writer,
|
|
|
|
0
|
|
|
|
};
|
|
|
|
|
|
|
|
/* Create an unencoding writer stage using the given handler. */
|
|
|
|
static contenc_writer *new_unencoding_writer(struct connectdata *conn,
|
|
|
|
const content_encoding *handler,
|
|
|
|
contenc_writer *downstream)
|
|
|
|
{
|
|
|
|
size_t sz = offsetof(contenc_writer, params) + handler->paramsize;
|
2018-04-14 23:42:04 +03:00
|
|
|
contenc_writer *writer = (contenc_writer *) calloc(1, sz);
|
2017-11-05 17:09:48 +03:00
|
|
|
|
|
|
|
if(writer) {
|
|
|
|
writer->handler = handler;
|
|
|
|
writer->downstream = downstream;
|
|
|
|
if(handler->init_writer(conn, writer)) {
|
|
|
|
free(writer);
|
|
|
|
writer = NULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return writer;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Write data using an unencoding writer stack. */
|
|
|
|
CURLcode Curl_unencode_write(struct connectdata *conn, contenc_writer *writer,
|
|
|
|
const char *buf, size_t nbytes)
|
|
|
|
{
|
2017-11-07 04:38:34 +03:00
|
|
|
if(!nbytes)
|
|
|
|
return CURLE_OK;
|
2017-11-05 17:09:48 +03:00
|
|
|
return writer->handler->unencode_write(conn, writer, buf, nbytes);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Close and clean-up the connection's writer stack. */
|
2009-05-11 13:55:28 +04:00
|
|
|
void Curl_unencode_cleanup(struct connectdata *conn)
|
|
|
|
{
|
2016-06-21 16:47:12 +03:00
|
|
|
struct Curl_easy *data = conn->data;
|
2009-05-11 13:55:28 +04:00
|
|
|
struct SingleRequest *k = &data->req;
|
2017-11-05 17:09:48 +03:00
|
|
|
contenc_writer *writer = k->writer_stack;
|
|
|
|
|
|
|
|
while(writer) {
|
|
|
|
k->writer_stack = writer->downstream;
|
|
|
|
writer->handler->close_writer(conn, writer);
|
|
|
|
free(writer);
|
|
|
|
writer = k->writer_stack;
|
|
|
|
}
|
2009-05-11 13:55:28 +04:00
|
|
|
}
|
|
|
|
|
2017-11-05 17:09:48 +03:00
|
|
|
/* Find the content encoding by name. */
|
|
|
|
static const content_encoding *find_encoding(const char *name, size_t len)
|
|
|
|
{
|
|
|
|
const content_encoding * const *cep;
|
|
|
|
|
|
|
|
for(cep = encodings; *cep; cep++) {
|
2018-06-02 23:52:56 +03:00
|
|
|
const content_encoding *ce = *cep;
|
2017-11-05 17:09:48 +03:00
|
|
|
if((strncasecompare(name, ce->name, len) && !ce->name[len]) ||
|
|
|
|
(ce->alias && strncasecompare(name, ce->alias, len) && !ce->alias[len]))
|
|
|
|
return ce;
|
|
|
|
}
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Set-up the unencoding stack from the Content-Encoding header value.
|
|
|
|
* See RFC 7231 section 3.1.2.2. */
|
|
|
|
CURLcode Curl_build_unencoding_stack(struct connectdata *conn,
|
|
|
|
const char *enclist, int maybechunked)
|
|
|
|
{
|
|
|
|
struct Curl_easy *data = conn->data;
|
|
|
|
struct SingleRequest *k = &data->req;
|
|
|
|
|
|
|
|
do {
|
|
|
|
const char *name;
|
|
|
|
size_t namelen;
|
|
|
|
|
|
|
|
/* Parse a single encoding name. */
|
|
|
|
while(ISSPACE(*enclist) || *enclist == ',')
|
|
|
|
enclist++;
|
|
|
|
|
|
|
|
name = enclist;
|
|
|
|
|
|
|
|
for(namelen = 0; *enclist && *enclist != ','; enclist++)
|
|
|
|
if(!ISSPACE(*enclist))
|
|
|
|
namelen = enclist - name + 1;
|
|
|
|
|
|
|
|
/* Special case: chunked encoding is handled at the reader level. */
|
|
|
|
if(maybechunked && namelen == 7 && strncasecompare(name, "chunked", 7)) {
|
|
|
|
k->chunk = TRUE; /* chunks coming our way. */
|
|
|
|
Curl_httpchunk_init(conn); /* init our chunky engine. */
|
|
|
|
}
|
|
|
|
else if(namelen) {
|
|
|
|
const content_encoding *encoding = find_encoding(name, namelen);
|
|
|
|
contenc_writer *writer;
|
|
|
|
|
|
|
|
if(!k->writer_stack) {
|
|
|
|
k->writer_stack = new_unencoding_writer(conn, &client_encoding, NULL);
|
|
|
|
|
|
|
|
if(!k->writer_stack)
|
|
|
|
return CURLE_OUT_OF_MEMORY;
|
|
|
|
}
|
|
|
|
|
|
|
|
if(!encoding)
|
|
|
|
encoding = &error_encoding; /* Defer error at stack use. */
|
|
|
|
|
|
|
|
/* Stack the unencoding stage. */
|
|
|
|
writer = new_unencoding_writer(conn, encoding, k->writer_stack);
|
|
|
|
if(!writer)
|
|
|
|
return CURLE_OUT_OF_MEMORY;
|
|
|
|
k->writer_stack = writer;
|
|
|
|
}
|
|
|
|
} while(*enclist);
|
|
|
|
|
|
|
|
return CURLE_OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
#else
|
|
|
|
/* Stubs for builds without HTTP. */
|
|
|
|
CURLcode Curl_build_unencoding_stack(struct connectdata *conn,
|
|
|
|
const char *enclist, int maybechunked)
|
|
|
|
{
|
|
|
|
(void) conn;
|
|
|
|
(void) enclist;
|
|
|
|
(void) maybechunked;
|
|
|
|
return CURLE_NOT_BUILT_IN;
|
|
|
|
}
|
|
|
|
|
|
|
|
CURLcode Curl_unencode_write(struct connectdata *conn, contenc_writer *writer,
|
|
|
|
const char *buf, size_t nbytes)
|
|
|
|
{
|
|
|
|
(void) conn;
|
|
|
|
(void) writer;
|
|
|
|
(void) buf;
|
|
|
|
(void) nbytes;
|
|
|
|
return CURLE_NOT_BUILT_IN;
|
|
|
|
}
|
|
|
|
|
|
|
|
void Curl_unencode_cleanup(struct connectdata *conn)
|
|
|
|
{
|
|
|
|
(void) conn;
|
|
|
|
}
|
|
|
|
|
|
|
|
char *Curl_all_content_encodings(void)
|
|
|
|
{
|
|
|
|
return strdup(CONTENT_ENCODING_DEFAULT); /* Satisfy caller. */
|
|
|
|
}
|
|
|
|
|
|
|
|
#endif /* CURL_DISABLE_HTTP */
|