mirror of
https://github.com/curl/curl.git
synced 2024-11-21 01:16:58 +08:00
Added ghiper.c, Jeff Pohlmeyer's example code using the curl_multi_socket()
API with glib2
This commit is contained in:
Daniel Stenberg
parent
1ce7b48057
commit
d5eb386d00
@ -12,7 +12,7 @@ EXTRA_DIST = README curlgtk.c sepheaders.c simple.c postit2.c \
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multi-debugcallback.c fileupload.c getinfo.c ftp3rdparty.c debug.c \
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anyauthput.c htmltitle.cc htmltidy.c opensslthreadlock.c \
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cookie_interface.c cacertinmem.c synctime.c sampleconv.c ftpuploadresume.c \
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10-at-a-time.c hiperfifo.c
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10-at-a-time.c hiperfifo.c ghiper.c
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all:
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@echo "done"
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462
docs/examples/ghiper.c
Normal file
462
docs/examples/ghiper.c
Normal file
@ -0,0 +1,462 @@
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/*****************************************************************************
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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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* $Id: ghiper.c
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*
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* Example application source code using the multi socket interface to
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* download many files at once.
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*
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* Written by Jeff Pohlmeyer
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Requires glib-2.x and a (POSIX?) system that has mkfifo().
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This is an adaptation of libcurl's "hipev.c" and libevent's "event-test.c"
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sample programs, adapted to use glib's g_io_channel in place of libevent.
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When running, the program creates the named pipe "hiper.fifo"
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Whenever there is input into the fifo, the program reads the input as a list
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of URL's and creates some new easy handles to fetch each URL via the
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curl_multi "hiper" API.
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Thus, you can try a single URL:
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% echo http://www.yahoo.com > hiper.fifo
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Or a whole bunch of them:
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% cat my-url-list > hiper.fifo
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The fifo buffer is handled almost instantly, so you can even add more URL's
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while the previous requests are still being downloaded.
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This is purely a demo app, all retrieved data is simply discarded by the write
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callback.
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*/
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#include <glib.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <errno.h>
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#include <curl/curl.h>
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#define MSG_OUT g_print /* Change to "g_error" to write to stderr */
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#define SHOW_VERBOSE 0 /* Set to non-zero for libcurl messages */
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#define SHOW_PROGRESS 0 /* Set to non-zero to enable progress callback */
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/* Global information, common to all connections */
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typedef struct _GlobalInfo {
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CURLM *multi;
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guint timer_event;
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int prev_running;
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int still_running;
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int requested; /* count: curl_easy_init() */
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int completed; /* count: curl_easy_cleanup() */
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} GlobalInfo;
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/* Information associated with a specific easy handle */
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typedef struct _ConnInfo {
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CURL *easy;
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char *url;
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GlobalInfo *global;
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char error[CURL_ERROR_SIZE];
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} ConnInfo;
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/* Information associated with a specific socket */
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typedef struct _SockInfo {
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curl_socket_t sockfd;
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CURL *easy;
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int action;
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long timeout;
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GIOChannel *ch;
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guint ev;
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GlobalInfo *global;
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} SockInfo;
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static void update_timeout(GlobalInfo *g);
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/* Die if we get a bad CURLMcode somewhere */
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static void mcode_or_die(char *where, CURLMcode code) {
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if ( CURLM_OK != code ) {
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char *s;
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switch (code) {
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case CURLM_CALL_MULTI_PERFORM: s="CURLM_CALL_MULTI_PERFORM"; break;
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case CURLM_OK: s="CURLM_OK"; break;
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case CURLM_BAD_HANDLE: s="CURLM_BAD_HANDLE"; break;
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case CURLM_BAD_EASY_HANDLE: s="CURLM_BAD_EASY_HANDLE"; break;
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case CURLM_OUT_OF_MEMORY: s="CURLM_OUT_OF_MEMORY"; break;
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case CURLM_INTERNAL_ERROR: s="CURLM_INTERNAL_ERROR"; break;
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case CURLM_BAD_SOCKET: s="CURLM_BAD_SOCKET"; break;
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case CURLM_UNKNOWN_OPTION: s="CURLM_UNKNOWN_OPTION"; break;
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case CURLM_LAST: s="CURLM_LAST"; break;
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default: s="CURLM_unknown";
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}
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MSG_OUT("ERROR: %s returns %s\n", where, s);
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exit(code);
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}
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}
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/* Check for completed transfers, and remove their easy handles */
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static void check_run_count(GlobalInfo *g)
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{
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if (g->prev_running > g->still_running) {
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char *eff_url=NULL;
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CURLMsg *msg;
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int msgs_left;
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ConnInfo *conn=NULL;
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CURL*easy;
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CURLcode res;
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MSG_OUT("REMAINING: %d\n", g->still_running);
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/*
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I am still uncertain whether it is safe to remove an easy handle
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from inside the curl_multi_info_read loop, so here I will search
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for completed transfers in the inner "while" loop, and then remove
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them in the outer "do-while" loop...
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*/
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do {
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easy=NULL;
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while ((msg = curl_multi_info_read(g->multi, &msgs_left))) {
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if (msg->msg == CURLMSG_DONE) {
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easy=msg->easy_handle;
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res=msg->data.result;
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break;
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}
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}
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if (easy) {
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curl_easy_getinfo(easy, CURLINFO_PRIVATE, &conn);
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curl_easy_getinfo(easy, CURLINFO_EFFECTIVE_URL, &eff_url);
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MSG_OUT("DONE: %s => (%d) %s\n", eff_url, res, conn->error);
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curl_multi_remove_handle(g->multi, easy);
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g_free(conn->url);
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curl_easy_cleanup(easy);
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g_free(conn);
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g->completed++;
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}
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} while ( easy );
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MSG_OUT("Requested: %d Completed:%d\n", g->requested, g->completed);
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}
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g->prev_running = g->still_running;
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}
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/* Called by glib when our timeout expires */
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static gboolean timer_cb(gpointer data)
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{
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GlobalInfo *g = (GlobalInfo *)data;
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CURLMcode rc;
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do {
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rc = curl_multi_socket(g->multi, CURL_SOCKET_TIMEOUT, &g->still_running);
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} while (rc == CURLM_CALL_MULTI_PERFORM);
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mcode_or_die("timer_cb: curl_multi_socket", rc);
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check_run_count(g);
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if ( g->still_running ) { update_timeout(g); }
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return FALSE;
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}
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/* Update the event timer after curl_multi library calls */
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static void update_timeout(GlobalInfo *g)
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{
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long timeout_ms;
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curl_multi_timeout(g->multi, &timeout_ms);
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if ( timeout_ms < 0 ) { return; }
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/* MSG_OUT("update_timeout to %ld ms\n", timeout_ms); */
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g->timer_event = g_timeout_add(timeout_ms, timer_cb,g);
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}
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/* Called by glib when we get action on a multi socket */
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static gboolean event_cb(GIOChannel *ch, GIOCondition condition, gpointer data)
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{
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GlobalInfo *g = (GlobalInfo*) data;
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CURLMcode rc;
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int fd=g_io_channel_unix_get_fd(ch);
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do {
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rc = curl_multi_socket(g->multi, fd, &g->still_running);
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} while (rc == CURLM_CALL_MULTI_PERFORM);
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mcode_or_die("event_cb: curl_multi_socket", rc);
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check_run_count(g);
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if(g->still_running) {
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update_timeout(g);
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return TRUE;
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} else {
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MSG_OUT("last transfer done, kill timeout\n");
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if (g->timer_event) { g_source_remove(g->timer_event); }
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return FALSE;
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}
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}
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/* Clean up the SockInfo structure */
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static void remsock(SockInfo *f)
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{
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if (!f) { return; }
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if (f->ev) { g_source_remove(f->ev); }
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g_free(f);
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}
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/* Assign information to a SockInfo structure */
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static void setsock(SockInfo*f, curl_socket_t s, CURL*e, int act, GlobalInfo*g)
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{
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GIOCondition kind =
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(act&CURL_POLL_IN?G_IO_IN:0)|(act&CURL_POLL_OUT?G_IO_OUT:0);
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f->sockfd = s;
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f->action = act;
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f->easy = e;
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if (f->ev) { g_source_remove(f->ev); }
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f->ev=g_io_add_watch(f->ch, kind, event_cb,g);
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}
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/* Initialize a new SockInfo structure */
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static void addsock(curl_socket_t s, CURL *easy, int action, GlobalInfo *g)
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{
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SockInfo *fdp = g_malloc0(sizeof(SockInfo));
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fdp->global = g;
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fdp->ch=g_io_channel_unix_new(s);
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setsock(fdp, s, easy, action, g);
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curl_multi_assign(g->multi, s, fdp);
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}
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/* CURLMOPT_SOCKETFUNCTION */
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static int sock_cb(CURL *e, curl_socket_t s, int what, void *cbp, void *sockp)
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{
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GlobalInfo *g = (GlobalInfo*) cbp;
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SockInfo *fdp = (SockInfo*) sockp;
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char *whatstr[]={ "none", "IN", "OUT", "INOUT", "REMOVE" };
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MSG_OUT("socket callback: s=%d e=%p what=%s ", s, e, whatstr[what]);
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if (what == CURL_POLL_REMOVE) {
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MSG_OUT("\n");
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remsock(fdp);
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} else {
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if (!fdp) {
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MSG_OUT("Adding data: %s%s\n",
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what&CURL_POLL_IN?"READ":"",
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what&CURL_POLL_OUT?"WRITE":"" );
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addsock(s, e, what, g);
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}
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else {
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MSG_OUT(
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"Changing action from %d to %d\n", fdp->action, what);
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setsock(fdp, s, e, what, g);
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}
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}
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return 0;
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}
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/* CURLOPT_WRITEFUNCTION */
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static size_t write_cb(void *ptr, size_t size, size_t nmemb, void *data)
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{
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size_t realsize = size * nmemb;
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ConnInfo *conn = (ConnInfo*) data;
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(void)ptr;
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(void)conn;
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return realsize;
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}
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/* CURLOPT_PROGRESSFUNCTION */
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static int prog_cb (void *p, double dltotal, double dlnow, double ult, double uln)
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{
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ConnInfo *conn = (ConnInfo *)p;
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MSG_OUT("Progress: %s (%g/%g)\n", conn->url, dlnow, dltotal);
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return 0;
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}
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/* Create a new easy handle, and add it to the global curl_multi */
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static void new_conn(char *url, GlobalInfo *g )
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{
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ConnInfo *conn;
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CURLMcode rc;
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conn = g_malloc0(sizeof(ConnInfo));
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conn->error[0]='\0';
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conn->easy = curl_easy_init();
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if (!conn->easy) {
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MSG_OUT("curl_easy_init() failed, exiting!\n");
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exit(2);
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}
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conn->global = g;
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conn->url = g_strdup(url);
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curl_easy_setopt(conn->easy, CURLOPT_URL, conn->url);
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curl_easy_setopt(conn->easy, CURLOPT_WRITEFUNCTION, write_cb);
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curl_easy_setopt(conn->easy, CURLOPT_WRITEDATA, &conn);
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curl_easy_setopt(conn->easy, CURLOPT_VERBOSE, SHOW_VERBOSE);
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curl_easy_setopt(conn->easy, CURLOPT_ERRORBUFFER, conn->error);
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curl_easy_setopt(conn->easy, CURLOPT_PRIVATE, conn);
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curl_easy_setopt(conn->easy, CURLOPT_NOPROGRESS, SHOW_PROGRESS?0:1);
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curl_easy_setopt(conn->easy, CURLOPT_PROGRESSFUNCTION, prog_cb);
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curl_easy_setopt(conn->easy, CURLOPT_PROGRESSDATA, conn);
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curl_easy_setopt(conn->easy, CURLOPT_FOLLOWLOCATION, 1);
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curl_easy_setopt(conn->easy, CURLOPT_CONNECTTIMEOUT, 30);
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curl_easy_setopt(conn->easy, CURLOPT_LOW_SPEED_LIMIT, 1);
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curl_easy_setopt(conn->easy, CURLOPT_LOW_SPEED_TIME, 30);
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MSG_OUT("Adding easy %p to multi %p (%s)\n", conn->easy, g->multi, url);
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rc =curl_multi_add_handle(g->multi, conn->easy);
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mcode_or_die("new_conn: curl_multi_add_handle", rc);
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g->requested++;
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do {
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rc = curl_multi_socket_all(g->multi, &g->still_running);
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} while (CURLM_CALL_MULTI_PERFORM == rc);
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mcode_or_die("new_conn: curl_multi_socket_all", rc);
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check_run_count(g);
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}
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/* This gets called by glib whenever data is received from the fifo */
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static gboolean fifo_cb (GIOChannel *ch, GIOCondition condition, gpointer data)
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{
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#define BUF_SIZE 1024
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gsize len, tp;
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gchar *buf, *tmp, *all=NULL;
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GIOStatus rv;
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do {
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GError *err=NULL;
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rv = g_io_channel_read_line (ch,&buf,&len,&tp,&err);
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if ( buf ) {
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if (tp) { buf[tp]='\0'; }
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new_conn(buf,(GlobalInfo*)data);
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g_free(buf);
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} else {
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buf = g_malloc(BUF_SIZE+1);
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while (TRUE) {
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buf[BUF_SIZE]='\0';
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g_io_channel_read_chars(ch,buf,BUF_SIZE,&len,&err);
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if (len) {
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buf[len]='\0';
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if (all) {
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tmp=all;
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all=g_strdup_printf("%s%s", tmp, buf);
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g_free(tmp);
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} else {
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all = g_strdup(buf);
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}
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} else {
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break;
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}
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}
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if (all) {
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new_conn(all,(GlobalInfo*)data);
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g_free(all);
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}
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g_free(buf);
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}
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if ( err ) {
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g_error("fifo_cb: %s", err->message);
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g_free(err);
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break;
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}
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} while ( (len) && (rv == G_IO_STATUS_NORMAL) );
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return TRUE;
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}
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int init_fifo(void)
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{
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struct stat st;
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char *fifo = "hiper.fifo";
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int socket;
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if (lstat (fifo, &st) == 0) {
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if ((st.st_mode & S_IFMT) == S_IFREG) {
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errno = EEXIST;
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perror("lstat");
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exit (1);
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}
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}
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unlink (fifo);
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if (mkfifo (fifo, 0600) == -1) {
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perror("mkfifo");
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exit (1);
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}
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socket = open (fifo, O_RDWR | O_NONBLOCK, 0);
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if (socket == -1) {
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perror("open");
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exit (1);
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}
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MSG_OUT("Now, pipe some URL's into > %s\n", fifo);
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return socket;
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}
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int main(int argc, char **argv)
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{
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GlobalInfo *g;
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CURLMcode rc;
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GMainLoop*gmain;
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int fd;
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GIOChannel* ch;
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g=g_malloc0(sizeof(GlobalInfo));
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fd=init_fifo();
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ch=g_io_channel_unix_new(fd);
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g_io_add_watch(ch,G_IO_IN,fifo_cb,g);
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gmain=g_main_loop_new(NULL,FALSE);
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g->multi = curl_multi_init();
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curl_multi_setopt(g->multi, CURLMOPT_SOCKETFUNCTION, sock_cb);
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curl_multi_setopt(g->multi, CURLMOPT_SOCKETDATA, g);
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do {
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rc = curl_multi_socket_all(g->multi, &g->still_running);
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} while (CURLM_CALL_MULTI_PERFORM == rc);
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update_timeout(g);
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g_main_loop_run(gmain);
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curl_multi_cleanup(g->multi);
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return 0;
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}
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