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- /***************************************************************************
- * _ _ ____ _
- * 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 "tool_setup.h"
- #ifdef HAVE_SYS_SELECT_H
- #include <sys/select.h>
- #endif
- #define ENABLE_CURLX_PRINTF
- /* use our own printf() functions */
- #include "curlx.h"
- #include "tool_cfgable.h"
- #include "tool_cb_rea.h"
- #include "tool_operate.h"
- #include "tool_util.h"
- #include "tool_msgs.h"
- #include "tool_sleep.h"
- #include "memdebug.h" /* keep this as LAST include */
- /*
- ** callback for CURLOPT_READFUNCTION
- */
- size_t tool_read_cb(char *buffer, size_t sz, size_t nmemb, void *userdata)
- {
- ssize_t rc = 0;
- struct per_transfer *per = userdata;
- struct OperationConfig *config = per->config;
- if((per->uploadfilesize != -1) &&
- (per->uploadedsofar == per->uploadfilesize)) {
- /* done */
- return 0;
- }
- if(config->timeout_ms) {
- struct timeval now = tvnow();
- long msdelta = tvdiff(now, per->start);
- if(msdelta > config->timeout_ms)
- /* timeout */
- return 0;
- #ifndef _WIN32
- /* this logic waits on read activity on a file descriptor that is not a
- socket which makes it not work with select() on Windows */
- else {
- fd_set bits;
- struct timeval timeout;
- long wait = config->timeout_ms - msdelta;
- /* wait this long at the most */
- timeout.tv_sec = wait/1000;
- timeout.tv_usec = (int)((wait%1000)*1000);
- FD_ZERO(&bits);
- FD_SET(per->infd, &bits);
- if(!select(per->infd + 1, &bits, NULL, NULL, &timeout))
- return 0; /* timeout */
- }
- #endif
- }
- rc = read(per->infd, buffer, sz*nmemb);
- if(rc < 0) {
- if(errno == EAGAIN) {
- errno = 0;
- config->readbusy = TRUE;
- return CURL_READFUNC_PAUSE;
- }
- /* since size_t is unsigned we can't return negative values fine */
- rc = 0;
- }
- if((per->uploadfilesize != -1) &&
- (per->uploadedsofar + rc > per->uploadfilesize)) {
- /* do not allow uploading more than originally set out to do */
- curl_off_t delta = per->uploadedsofar + rc - per->uploadfilesize;
- warnf(per->config->global, "File size larger in the end than when "
- "started. Dropping at least %" CURL_FORMAT_CURL_OFF_T " bytes",
- delta);
- rc = (ssize_t)(per->uploadfilesize - per->uploadedsofar);
- }
- config->readbusy = FALSE;
- /* when select() returned zero here, it timed out */
- return (size_t)rc;
- }
- /*
- ** callback for CURLOPT_XFERINFOFUNCTION used to unpause busy reads
- */
- int tool_readbusy_cb(void *clientp,
- curl_off_t dltotal, curl_off_t dlnow,
- curl_off_t ultotal, curl_off_t ulnow)
- {
- struct per_transfer *per = clientp;
- struct OperationConfig *config = per->config;
- (void)dltotal; /* unused */
- (void)dlnow; /* unused */
- (void)ultotal; /* unused */
- (void)ulnow; /* unused */
- if(config->readbusy) {
- /* lame code to keep the rate down because the input might not deliver
- anything, get paused again and come back here immediately */
- static long rate = 500;
- static struct timeval prev;
- static curl_off_t ulprev;
- if(ulprev == ulnow) {
- /* it did not upload anything since last call */
- struct timeval now = tvnow();
- if(prev.tv_sec)
- /* get a rolling average rate */
- /* rate = rate - rate/4 + tvdiff(now, prev)/4; */
- rate -= rate/4 - tvdiff(now, prev)/4;
- prev = now;
- }
- else {
- rate = 50;
- ulprev = ulnow;
- }
- if(rate >= 50) {
- /* keeps the looping down to 20 times per second in the crazy case */
- config->readbusy = FALSE;
- curl_easy_pause(per->curl, CURLPAUSE_CONT);
- }
- else
- /* sleep half a period */
- tool_go_sleep(25);
- }
- return per->noprogress? 0 : CURL_PROGRESSFUNC_CONTINUE;
- }
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