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0f147887b0
Introducing a number of options to the multi interface that allows for multiple pipelines to the same host, in order to optimize the balance between the penalty for opening new connections and the potential pipelining latency. Two new options for limiting the number of connections: CURLMOPT_MAX_HOST_CONNECTIONS - Limits the number of running connections to the same host. When adding a handle that exceeds this limit, that handle will be put in a pending state until another handle is finished, so we can reuse the connection. CURLMOPT_MAX_TOTAL_CONNECTIONS - Limits the number of connections in total. When adding a handle that exceeds this limit, that handle will be put in a pending state until another handle is finished. The free connection will then be reused, if possible, or closed if the pending handle can't reuse it. Several new options for pipelining: CURLMOPT_MAX_PIPELINE_LENGTH - Limits the pipeling length. If a pipeline is "full" when a connection is to be reused, a new connection will be opened if the CURLMOPT_MAX_xxx_CONNECTIONS limits allow it. If not, the handle will be put in a pending state until a connection is ready (either free or a pipe got shorter). CURLMOPT_CONTENT_LENGTH_PENALTY_SIZE - A pipelined connection will not be reused if it is currently processing a transfer with a content length that is larger than this. CURLMOPT_CHUNK_LENGTH_PENALTY_SIZE - A pipelined connection will not be reused if it is currently processing a chunk larger than this. CURLMOPT_PIPELINING_SITE_BL - A blacklist of hosts that don't allow pipelining. CURLMOPT_PIPELINING_SERVER_BL - A blacklist of server types that don't allow pipelining. See the curl_multi_setopt() man page for details.
121 lines
3.1 KiB
C
121 lines
3.1 KiB
C
/***************************************************************************
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* _ _ ____ _
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* Project ___| | | | _ \| |
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* / __| | | | |_) | |
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* | (__| |_| | _ <| |___
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* \___|\___/|_| \_\_____|
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*
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* Copyright (C) 1998 - 2011, Daniel Stenberg, <daniel@haxx.se>, et al.
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*
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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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* are also available at http://curl.haxx.se/docs/copyright.html.
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*
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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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* furnished to do so, under the terms of the COPYING file.
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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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***************************************************************************/
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#include "test.h"
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#include "testutil.h"
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#include "warnless.h"
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#include "memdebug.h"
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#define TEST_HANG_TIMEOUT 60 * 1000
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#define NUM_HANDLES 4
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int test(char *URL)
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{
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int res = 0;
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CURL *curl[NUM_HANDLES];
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int running;
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CURLM *m = NULL;
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int i;
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char target_url[256];
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int handles_added = 0;
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for(i=0; i < NUM_HANDLES; i++)
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curl[i] = NULL;
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start_test_timing();
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global_init(CURL_GLOBAL_ALL);
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multi_init(m);
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/* get NUM_HANDLES easy handles */
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for(i=0; i < NUM_HANDLES; i++) {
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/* get an easy handle */
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easy_init(curl[i]);
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/* specify target */
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sprintf(target_url, "%s%04i", URL, i + 1);
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target_url[sizeof(target_url) - 1] = '\0';
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easy_setopt(curl[i], CURLOPT_URL, target_url);
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/* go verbose */
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easy_setopt(curl[i], CURLOPT_VERBOSE, 1L);
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/* include headers */
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easy_setopt(curl[i], CURLOPT_HEADER, 1L);
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}
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/* Add the first handle to multi. We do this to let libcurl detect
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that the server can do pipelining. The rest of the handles will be
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added later. */
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multi_add_handle(m, curl[handles_added++]);
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multi_setopt(m, CURLMOPT_PIPELINING, 1L);
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fprintf(stderr, "Start at URL 0\n");
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for(;;) {
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struct timeval interval;
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fd_set rd, wr, exc;
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int maxfd = -99;
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interval.tv_sec = 1;
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interval.tv_usec = 0;
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multi_perform(m, &running);
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abort_on_test_timeout();
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if(!running && handles_added >= NUM_HANDLES)
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break; /* done */
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/* Add the rest of the handles now that the first handle has sent the
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request. */
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while(handles_added < NUM_HANDLES)
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multi_add_handle(m, curl[handles_added++]);
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FD_ZERO(&rd);
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FD_ZERO(&wr);
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FD_ZERO(&exc);
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multi_fdset(m, &rd, &wr, &exc, &maxfd);
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/* At this point, maxfd is guaranteed to be greater or equal than -1. */
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select_test(maxfd+1, &rd, &wr, &exc, &interval);
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abort_on_test_timeout();
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}
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test_cleanup:
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/* proper cleanup sequence - type PB */
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for(i=0; i < NUM_HANDLES; i++) {
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curl_multi_remove_handle(m, curl[i]);
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curl_easy_cleanup(curl[i]);
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}
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curl_multi_cleanup(m);
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curl_global_cleanup();
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return res;
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}
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