mirror of
https://github.com/moparisthebest/curl
synced 2024-12-21 15:48:49 -05:00
109 lines
3.3 KiB
Plaintext
109 lines
3.3 KiB
Plaintext
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|_|_|_.__/ \___|\__,_|_| |_|
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How To Use Libcurl In Your Program:
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(by Ralph Beckmann <rabe@uni-paderborn.de>)
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NOTE: If you plan to use libcurl.a in Threads under Linux, do not use the old
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gcc-2.7.x because the function 'gethostbyname' seems not to be thread-safe,
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that is to say an unavoidable SEGMENTATION FAULT might occur.
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1. a) In a C-Program:
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#include "curl.h"
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b) In a C++-Program:
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extern "C" {
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#include "curl.h"
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}
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2. char *url="http://www.domain.com";
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curl_urlget (URGTAG_URL, url,
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URGTAG_FLAGS, CONF_NOPROGRESS,
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URGTAG_ERRORBUFFER, errorBuffer,
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URGTAG_WRITEFUNCTION, (size_t (*)(void *, int, int, FILE
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*))handle_data,
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URGTAG_TIMEOUT, 30, /* or anything You want */
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...
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URGTAG_DONE);
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3. size_t handle_data (const void *ptr, size_t size, size_t nitems,
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FILE *stream)
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{
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(void)stream; /* stop complaining using g++ -Wall */
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if ((int)nitems <= 0) {
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return (size_t)0;
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}
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fprintf(stdout, (char *)ptr); /* or do anything else with it */
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return nitems;
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}
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4. Compile Your Program with -I$(CURL_DIR)/include
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5. Link Your Program together with $(CURL_DIR)/lib/libcurl.a
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Small Example of How To Use libcurl
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----------------------------------------------------------------------
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/* Full example that uses libcurl.a to fetch web pages. */
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/* curlthreads.c */
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/* - Test-Program by Ralph Beckmann for using curl in POSIX-Threads */
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/* Change *url1 and *url2 to textual long and slow non-FRAMESET websites! */
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/*
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1. Compile with gcc or g++ as $(CC):
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$(CC) -c -Wall -pedantic curlthreads.c -I$(CURL_DIR)/include
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2. Link with:
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- Linux:
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$(CC) -o curlthreads curlthreads.o $(CURL_DIR)/lib/libcurl.a -lpthread
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-lm
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- Solaris:
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$(CC) -o curlthreads curlthreads.o $(CURL_DIR)/lib/libcurl.a -lpthread
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-lm -lsocket -lnsl
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*/
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#include <pthread.h>
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#include <stdio.h>
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#ifdef __cplusplus
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extern "C" {
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#include "curl.h"
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}
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#else
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#include "curl.h"
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#endif
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size_t storedata (const void *ptr, size_t size, size_t nitems, FILE *stream) {
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(void)ptr; (void)stream; /* just to stop g++ -Wall complaining */
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fprintf(stdout, "Thread #%i reads %i Bytes.\n",
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(int)pthread_self(), (int)(nitems*size));
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return (nitems);
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}
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void *urlfetcher(void *url) {
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curl_urlget (URGTAG_URL, url,
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URGTAG_FLAGS, CONF_NOPROGRESS | CONF_FAILONERROR,
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URGTAG_WRITEFUNCTION, (size_t (*)(void *, int, int, FILE
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*))storedata,
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URGTAG_DONE);
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return NULL;
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}
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int main(void) {
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char *url1="www.sun.com";
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char *url2="www.microsoft.com";
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pthread_t thread_id1, thread_id2;
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pthread_create(&thread_id1, NULL, urlfetcher, (void *)url1);
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pthread_create(&thread_id2, NULL, urlfetcher, (void *)url2);
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pthread_join(thread_id1, NULL);
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pthread_join(thread_id2, NULL);
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fprintf(stdout, "Ready.\n");
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return 0;
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}
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