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libcurl: reset rewind flag in curl_easy_reset()

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curl_easy_reset() did not reset the `rewind_read` flag. This caused any
handles that previously had a CURLE_SEND_FAIL_REWIND error to get stuck
with that error, failing any subsequent requests, even if they didn't
have any body at all.

Verified in test 3034

Fixes #18206
Closes #18207
This commit is contained in:
Oxan van Leeuwen 2025-08-06 14:09:32 +02:00 • committed by Daniel Stenberg
parent ab9dfebdae
commit a93113b5b4
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GPG key ID: 5CC908FDB71E12C2
5 changed files with 120 additions and 2 deletions
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2
tests/libtest/Makefile.inc
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@ -104,6 +104,6 @@ TESTS_C = \
lib2402.c lib2404.c lib2405.c \
lib2502.c \
lib2700.c \
lib3010.c lib3025.c lib3026.c lib3027.c lib3033.c \
lib3010.c lib3025.c lib3026.c lib3027.c lib3033.c lib3034.c \
lib3100.c lib3101.c lib3102.c lib3103.c lib3104.c lib3105.c \
lib3207.c lib3208.c

77
tests/libtest/lib3034.c Normal file
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@ -0,0 +1,77 @@
/***************************************************************************
* _ _ ____ _
* Project ___| | | | _ \| |
* / __| | | | |_) | |
* | (__| |_| | _ <| |___
* \___|\___/|_| \_\_____|
*
* Copyright (C) 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 https://curl.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.
*
* SPDX-License-Identifier: curl
*
***************************************************************************/
#include "first.h"
static const char data_3034[] = "hello";
static size_t t3034_read_cb(char *ptr, size_t size, size_t nmemb, void *userp)
{
size_t len = size * nmemb;
size_t tocopy = sizeof(data_3034) < len ? sizeof(data_3034) : len;
(void)userp;
memcpy(ptr, data_3034, tocopy);
return tocopy;
}
static CURLcode test_lib3034(const char *URL)
{
CURL *curl;
CURLcode res = CURLE_OK;
global_init(CURL_GLOBAL_ALL);
easy_init(curl);
/* This first request will receive a redirect response; deliberately only
* set the CURLOPT_READFUNCTION but not the CURLOPT_SEEKFUNCTION to force a
* rewind failure (CURLE_SEND_FAIL_REWIND).
*/
test_setopt(curl, CURLOPT_VERBOSE, 1L);
test_setopt(curl, CURLOPT_URL, URL);
test_setopt(curl, CURLOPT_FOLLOWLOCATION, 1L);
test_setopt(curl, CURLOPT_UPLOAD, 1L);
test_setopt(curl, CURLOPT_INFILESIZE, 5L);
test_setopt(curl, CURLOPT_READFUNCTION, t3034_read_cb);
res = curl_easy_perform(curl);
if(res != CURLE_SEND_FAIL_REWIND) {
curl_mfprintf(stderr,
"%s:%d curl_easy_perform() failed with code %d (%s)\n",
__FILE__, __LINE__, res, curl_easy_strerror(res));
goto test_cleanup;
}
/* Reset the easy handle, which should clear the rewind failure. */
curl_easy_reset(curl);
/* Perform a second request, which should succeed. */
test_setopt(curl, CURLOPT_VERBOSE, 1L);
test_setopt(curl, CURLOPT_URL, URL);
res = curl_easy_perform(curl);
test_cleanup:
curl_easy_cleanup(curl);
curl_global_cleanup();
return res;
}