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authorYang Tse <yangsita@gmail.com>2013-01-04 02:50:28 +0100
committerYang Tse <yangsita@gmail.com>2013-01-06 18:20:27 +0100
commit4a5aa6682daeea7cd7cbbb47ce3e1c310e9261c2 (patch)
tree2e85c371bf30d0a1b166b6e30cc54ebef327967b /lib/http_chunks.c
parente0ba958e2896a1b44f00f00de4981400a47db614 (diff)
downloadcurl-4a5aa6682daeea7cd7cbbb47ce3e1c310e9261c2.tar.gz
Revert changes relative to lib/*.[ch] recent renaming
This reverts renaming and usage of lib/*.h header files done 28-12-2012, reverting 2 commits: f871de0... build: make use of 76 lib/*.h renamed files ffd8e12... build: rename 76 lib/*.h files This also reverts removal of redundant include guard (redundant thanks to changes in above commits) done 2-12-2013, reverting 1 commit: c087374... curl_setup.h: remove redundant include guard This also reverts renaming and usage of lib/*.c source files done 3-12-2013, reverting 3 commits: 13606bb... build: make use of 93 lib/*.c renamed files 5b6e792... build: rename 93 lib/*.c files 7d83dff... build: commit 13606bbfde follow-up 1 Start of related discussion thread: http://curl.haxx.se/mail/lib-2013-01/0012.html Asking for confirmation on pushing this revertion commit: http://curl.haxx.se/mail/lib-2013-01/0048.html Confirmation summary: http://curl.haxx.se/mail/lib-2013-01/0079.html NOTICE: The list of 2 files that have been modified by other intermixed commits, while renamed, and also by at least one of the 6 commits this one reverts follows below. These 2 files will exhibit a hole in history unless git's '--follow' option is used when viewing logs. lib/curl_imap.h lib/curl_smtp.h
Diffstat (limited to 'lib/http_chunks.c')
-rw-r--r--lib/http_chunks.c397
1 files changed, 397 insertions, 0 deletions
diff --git a/lib/http_chunks.c b/lib/http_chunks.c
new file mode 100644
index 000000000..d6a0bec13
--- /dev/null
+++ b/lib/http_chunks.c
@@ -0,0 +1,397 @@
+/***************************************************************************
+ * _ _ ____ _
+ * 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 "setup.h"
+
+#ifndef CURL_DISABLE_HTTP
+
+#include "urldata.h" /* it includes http_chunks.h */
+#include "sendf.h" /* for the client write stuff */
+
+#include "content_encoding.h"
+#include "http.h"
+#include "curl_memory.h"
+#include "non-ascii.h" /* for Curl_convert_to_network prototype */
+
+#define _MPRINTF_REPLACE /* use our functions only */
+#include <curl/mprintf.h>
+
+/* The last #include file should be: */
+#include "memdebug.h"
+
+/*
+ * Chunk format (simplified):
+ *
+ * <HEX SIZE>[ chunk extension ] CRLF
+ * <DATA> CRLF
+ *
+ * Highlights from RFC2616 section 3.6 say:
+
+ The chunked encoding modifies the body of a message in order to
+ transfer it as a series of chunks, each with its own size indicator,
+ followed by an OPTIONAL trailer containing entity-header fields. This
+ allows dynamically produced content to be transferred along with the
+ information necessary for the recipient to verify that it has
+ received the full message.
+
+ Chunked-Body = *chunk
+ last-chunk
+ trailer
+ CRLF
+
+ chunk = chunk-size [ chunk-extension ] CRLF
+ chunk-data CRLF
+ chunk-size = 1*HEX
+ last-chunk = 1*("0") [ chunk-extension ] CRLF
+
+ chunk-extension= *( ";" chunk-ext-name [ "=" chunk-ext-val ] )
+ chunk-ext-name = token
+ chunk-ext-val = token | quoted-string
+ chunk-data = chunk-size(OCTET)
+ trailer = *(entity-header CRLF)
+
+ The chunk-size field is a string of hex digits indicating the size of
+ the chunk. The chunked encoding is ended by any chunk whose size is
+ zero, followed by the trailer, which is terminated by an empty line.
+
+ */
+
+/* Check for an ASCII hex digit.
+ We avoid the use of isxdigit to accommodate non-ASCII hosts. */
+static bool Curl_isxdigit(char digit)
+{
+ return ( (digit >= 0x30 && digit <= 0x39) /* 0-9 */
+ || (digit >= 0x41 && digit <= 0x46) /* A-F */
+ || (digit >= 0x61 && digit <= 0x66) /* a-f */ ) ? TRUE : FALSE;
+}
+
+void Curl_httpchunk_init(struct connectdata *conn)
+{
+ struct Curl_chunker *chunk = &conn->chunk;
+ chunk->hexindex=0; /* start at 0 */
+ chunk->dataleft=0; /* no data left yet! */
+ chunk->state = CHUNK_HEX; /* we get hex first! */
+}
+
+/*
+ * chunk_read() returns a OK for normal operations, or a positive return code
+ * for errors. STOP means this sequence of chunks is complete. The 'wrote'
+ * argument is set to tell the caller how many bytes we actually passed to the
+ * client (for byte-counting and whatever).
+ *
+ * The states and the state-machine is further explained in the header file.
+ *
+ * This function always uses ASCII hex values to accommodate non-ASCII hosts.
+ * For example, 0x0d and 0x0a are used instead of '\r' and '\n'.
+ */
+CHUNKcode Curl_httpchunk_read(struct connectdata *conn,
+ char *datap,
+ ssize_t datalen,
+ ssize_t *wrotep)
+{
+ CURLcode result=CURLE_OK;
+ struct SessionHandle *data = conn->data;
+ struct Curl_chunker *ch = &conn->chunk;
+ struct SingleRequest *k = &data->req;
+ size_t piece;
+ size_t length = (size_t)datalen;
+ size_t *wrote = (size_t *)wrotep;
+
+ *wrote = 0; /* nothing's written yet */
+
+ /* the original data is written to the client, but we go on with the
+ chunk read process, to properly calculate the content length*/
+ if(data->set.http_te_skip && !k->ignorebody) {
+ result = Curl_client_write(conn, CLIENTWRITE_BODY, datap, datalen);
+ if(result)
+ return CHUNKE_WRITE_ERROR;
+ }
+
+ while(length) {
+ switch(ch->state) {
+ case CHUNK_HEX:
+ if(Curl_isxdigit(*datap)) {
+ if(ch->hexindex < MAXNUM_SIZE) {
+ ch->hexbuffer[ch->hexindex] = *datap;
+ datap++;
+ length--;
+ ch->hexindex++;
+ }
+ else {
+ return CHUNKE_TOO_LONG_HEX; /* longer hex than we support */
+ }
+ }
+ else {
+ if(0 == ch->hexindex) {
+ /* This is illegal data, we received junk where we expected
+ a hexadecimal digit. */
+ return CHUNKE_ILLEGAL_HEX;
+ }
+ /* length and datap are unmodified */
+ ch->hexbuffer[ch->hexindex]=0;
+
+ /* convert to host encoding before calling strtoul */
+ result = Curl_convert_from_network(conn->data, ch->hexbuffer,
+ ch->hexindex);
+ if(result) {
+ /* Curl_convert_from_network calls failf if unsuccessful */
+ /* Treat it as a bad hex character */
+ return(CHUNKE_ILLEGAL_HEX);
+ }
+
+ ch->datasize=strtoul(ch->hexbuffer, NULL, 16);
+ ch->state = CHUNK_POSTHEX;
+ }
+ break;
+
+ case CHUNK_POSTHEX:
+ /* In this state, we're waiting for CRLF to arrive. We support
+ this to allow so called chunk-extensions to show up here
+ before the CRLF comes. */
+ if(*datap == 0x0d)
+ ch->state = CHUNK_CR;
+ length--;
+ datap++;
+ break;
+
+ case CHUNK_CR:
+ /* waiting for the LF */
+ if(*datap == 0x0a) {
+ /* we're now expecting data to come, unless size was zero! */
+ if(0 == ch->datasize) {
+ ch->state = CHUNK_TRAILER; /* now check for trailers */
+ conn->trlPos=0;
+ }
+ else {
+ ch->state = CHUNK_DATA;
+ }
+ }
+ else
+ /* previously we got a fake CR, go back to CR waiting! */
+ ch->state = CHUNK_CR;
+ datap++;
+ length--;
+ break;
+
+ case CHUNK_DATA:
+ /* we get pure and fine data
+
+ We expect another 'datasize' of data. We have 'length' right now,
+ it can be more or less than 'datasize'. Get the smallest piece.
+ */
+ piece = (ch->datasize >= length)?length:ch->datasize;
+
+ /* Write the data portion available */
+#ifdef HAVE_LIBZ
+ switch (conn->data->set.http_ce_skip?
+ IDENTITY : data->req.auto_decoding) {
+ case IDENTITY:
+#endif
+ if(!k->ignorebody) {
+ if(!data->set.http_te_skip)
+ result = Curl_client_write(conn, CLIENTWRITE_BODY, datap,
+ piece);
+ else
+ result = CURLE_OK;
+ }
+#ifdef HAVE_LIBZ
+ break;
+
+ case DEFLATE:
+ /* update data->req.keep.str to point to the chunk data. */
+ data->req.str = datap;
+ result = Curl_unencode_deflate_write(conn, &data->req,
+ (ssize_t)piece);
+ break;
+
+ case GZIP:
+ /* update data->req.keep.str to point to the chunk data. */
+ data->req.str = datap;
+ result = Curl_unencode_gzip_write(conn, &data->req,
+ (ssize_t)piece);
+ break;
+
+ case COMPRESS:
+ default:
+ failf (conn->data,
+ "Unrecognized content encoding type. "
+ "libcurl understands `identity', `deflate' and `gzip' "
+ "content encodings.");
+ return CHUNKE_BAD_ENCODING;
+ }
+#endif
+
+ if(result)
+ return CHUNKE_WRITE_ERROR;
+
+ *wrote += piece;
+
+ ch->datasize -= piece; /* decrease amount left to expect */
+ datap += piece; /* move read pointer forward */
+ length -= piece; /* decrease space left in this round */
+
+ if(0 == ch->datasize)
+ /* end of data this round, we now expect a trailing CRLF */
+ ch->state = CHUNK_POSTCR;
+ break;
+
+ case CHUNK_POSTCR:
+ if(*datap == 0x0d) {
+ ch->state = CHUNK_POSTLF;
+ datap++;
+ length--;
+ }
+ else
+ return CHUNKE_BAD_CHUNK;
+
+ break;
+
+ case CHUNK_POSTLF:
+ if(*datap == 0x0a) {
+ /*
+ * The last one before we go back to hex state and start all
+ * over.
+ */
+ Curl_httpchunk_init(conn);
+ datap++;
+ length--;
+ }
+ else
+ return CHUNKE_BAD_CHUNK;
+
+ break;
+
+ case CHUNK_TRAILER:
+ if(*datap == 0x0d) {
+ /* this is the end of a trailer, but if the trailer was zero bytes
+ there was no trailer and we move on */
+
+ if(conn->trlPos) {
+ /* we allocate trailer with 3 bytes extra room to fit this */
+ conn->trailer[conn->trlPos++]=0x0d;
+ conn->trailer[conn->trlPos++]=0x0a;
+ conn->trailer[conn->trlPos]=0;
+
+ /* Convert to host encoding before calling Curl_client_write */
+ result = Curl_convert_from_network(conn->data, conn->trailer,
+ conn->trlPos);
+ if(result)
+ /* Curl_convert_from_network calls failf if unsuccessful */
+ /* Treat it as a bad chunk */
+ return CHUNKE_BAD_CHUNK;
+
+ if(!data->set.http_te_skip) {
+ result = Curl_client_write(conn, CLIENTWRITE_HEADER,
+ conn->trailer, conn->trlPos);
+ if(result)
+ return CHUNKE_WRITE_ERROR;
+ }
+ conn->trlPos=0;
+ ch->state = CHUNK_TRAILER_CR;
+ }
+ else {
+ /* no trailer, we're on the final CRLF pair */
+ ch->state = CHUNK_TRAILER_POSTCR;
+ break; /* don't advance the pointer */
+ }
+ }
+ else {
+ /* conn->trailer is assumed to be freed in url.c on a
+ connection basis */
+ if(conn->trlPos >= conn->trlMax) {
+ /* we always allocate three extra bytes, just because when the full
+ header has been received we append CRLF\0 */
+ char *ptr;
+ if(conn->trlMax) {
+ conn->trlMax *= 2;
+ ptr = realloc(conn->trailer, conn->trlMax + 3);
+ }
+ else {
+ conn->trlMax=128;
+ ptr = malloc(conn->trlMax + 3);
+ }
+ if(!ptr)
+ return CHUNKE_OUT_OF_MEMORY;
+ conn->trailer = ptr;
+ }
+ conn->trailer[conn->trlPos++]=*datap;
+ }
+ datap++;
+ length--;
+ break;
+
+ case CHUNK_TRAILER_CR:
+ if(*datap == 0x0a) {
+ ch->state = CHUNK_TRAILER_POSTCR;
+ datap++;
+ length--;
+ }
+ else
+ return CHUNKE_BAD_CHUNK;
+ break;
+
+ case CHUNK_TRAILER_POSTCR:
+ /* We enter this state when a CR should arrive so we expect to
+ have to first pass a CR before we wait for LF */
+ if(*datap != 0x0d) {
+ /* not a CR then it must be another header in the trailer */
+ ch->state = CHUNK_TRAILER;
+ break;
+ }
+ datap++;
+ length--;
+ /* now wait for the final LF */
+ ch->state = CHUNK_STOP;
+ break;
+
+ case CHUNK_STOPCR:
+ /* Read the final CRLF that ends all chunk bodies */
+
+ if(*datap == 0x0d) {
+ ch->state = CHUNK_STOP;
+ datap++;
+ length--;
+ }
+ else
+ return CHUNKE_BAD_CHUNK;
+ break;
+
+ case CHUNK_STOP:
+ if(*datap == 0x0a) {
+ length--;
+
+ /* Record the length of any data left in the end of the buffer
+ even if there's no more chunks to read */
+
+ ch->dataleft = length;
+ return CHUNKE_STOP; /* return stop */
+ }
+ else
+ return CHUNKE_BAD_CHUNK;
+
+ default:
+ return CHUNKE_STATE_ERROR;
+ }
+ }
+ return CHUNKE_OK;
+}
+#endif /* CURL_DISABLE_HTTP */