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-/***************************************************************************
- * _ _ ____ _
- * Project ___| | | | _ \| |
- * / __| | | | |_) | |
- * | (__| |_| | _ <| |___
- * \___|\___/|_| \_\_____|
- *
- * Copyright (C) 1998 - 2011, 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 http://curl.haxx.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.
- *
- ***************************************************************************/
-/* Example application source code using the multi socket interface to
- * download many files at once.
- *
- * Written by Jeff Pohlmeyer
-
-Requires glib-2.x and a (POSIX?) system that has mkfifo().
-
-This is an adaptation of libcurl's "hipev.c" and libevent's "event-test.c"
-sample programs, adapted to use glib's g_io_channel in place of libevent.
-
-When running, the program creates the named pipe "hiper.fifo"
-
-Whenever there is input into the fifo, the program reads the input as a list
-of URL's and creates some new easy handles to fetch each URL via the
-curl_multi "hiper" API.
-
-
-Thus, you can try a single URL:
- % echo http://www.yahoo.com > hiper.fifo
-
-Or a whole bunch of them:
- % cat my-url-list > hiper.fifo
-
-The fifo buffer is handled almost instantly, so you can even add more URL's
-while the previous requests are still being downloaded.
-
-This is purely a demo app, all retrieved data is simply discarded by the write
-callback.
-
-*/
-
-
-#include <glib.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <stdlib.h>
-#include <stdio.h>
-#include <errno.h>
-#include <curl/curl.h>
-
-
-#define MSG_OUT g_print /* Change to "g_error" to write to stderr */
-#define SHOW_VERBOSE 0 /* Set to non-zero for libcurl messages */
-#define SHOW_PROGRESS 0 /* Set to non-zero to enable progress callback */
-
-
-
-/* Global information, common to all connections */
-typedef struct _GlobalInfo {
- CURLM *multi;
- guint timer_event;
- int still_running;
-} GlobalInfo;
-
-
-
-/* Information associated with a specific easy handle */
-typedef struct _ConnInfo {
- CURL *easy;
- char *url;
- GlobalInfo *global;
- char error[CURL_ERROR_SIZE];
-} ConnInfo;
-
-
-/* Information associated with a specific socket */
-typedef struct _SockInfo {
- curl_socket_t sockfd;
- CURL *easy;
- int action;
- long timeout;
- GIOChannel *ch;
- guint ev;
- GlobalInfo *global;
-} SockInfo;
-
-
-
-
-/* Die if we get a bad CURLMcode somewhere */
-static void mcode_or_die(const char *where, CURLMcode code) {
- if ( CURLM_OK != code ) {
- const char *s;
- switch (code) {
- case CURLM_CALL_MULTI_PERFORM: s="CURLM_CALL_MULTI_PERFORM"; break;
- case CURLM_BAD_HANDLE: s="CURLM_BAD_HANDLE"; break;
- case CURLM_BAD_EASY_HANDLE: s="CURLM_BAD_EASY_HANDLE"; break;
- case CURLM_OUT_OF_MEMORY: s="CURLM_OUT_OF_MEMORY"; break;
- case CURLM_INTERNAL_ERROR: s="CURLM_INTERNAL_ERROR"; break;
- case CURLM_BAD_SOCKET: s="CURLM_BAD_SOCKET"; break;
- case CURLM_UNKNOWN_OPTION: s="CURLM_UNKNOWN_OPTION"; break;
- case CURLM_LAST: s="CURLM_LAST"; break;
- default: s="CURLM_unknown";
- }
- MSG_OUT("ERROR: %s returns %s\n", where, s);
- exit(code);
- }
-}
-
-
-
-/* Check for completed transfers, and remove their easy handles */
-static void check_multi_info(GlobalInfo *g)
-{
- char *eff_url;
- CURLMsg *msg;
- int msgs_left;
- ConnInfo *conn;
- CURL *easy;
- CURLcode res;
-
- MSG_OUT("REMAINING: %d\n", g->still_running);
- while ((msg = curl_multi_info_read(g->multi, &msgs_left))) {
- if (msg->msg == CURLMSG_DONE) {
- easy = msg->easy_handle;
- res = msg->data.result;
- curl_easy_getinfo(easy, CURLINFO_PRIVATE, &conn);
- curl_easy_getinfo(easy, CURLINFO_EFFECTIVE_URL, &eff_url);
- MSG_OUT("DONE: %s => (%d) %s\n", eff_url, res, conn->error);
- curl_multi_remove_handle(g->multi, easy);
- free(conn->url);
- curl_easy_cleanup(easy);
- free(conn);
- }
- }
-}
-
-
-
-/* Called by glib when our timeout expires */
-static gboolean timer_cb(gpointer data)
-{
- GlobalInfo *g = (GlobalInfo *)data;
- CURLMcode rc;
-
- rc = curl_multi_socket_action(g->multi,
- CURL_SOCKET_TIMEOUT, 0, &g->still_running);
- mcode_or_die("timer_cb: curl_multi_socket_action", rc);
- check_multi_info(g);
- return FALSE;
-}
-
-
-
-/* Update the event timer after curl_multi library calls */
-static int update_timeout_cb(CURLM *multi, long timeout_ms, void *userp)
-{
- struct timeval timeout;
- GlobalInfo *g=(GlobalInfo *)userp;
- timeout.tv_sec = timeout_ms/1000;
- timeout.tv_usec = (timeout_ms%1000)*1000;
-
- MSG_OUT("*** update_timeout_cb %ld => %ld:%ld ***\n",
- timeout_ms, timeout.tv_sec, timeout.tv_usec);
-
- g->timer_event = g_timeout_add(timeout_ms, timer_cb, g);
- return 0;
-}
-
-
-
-
-/* Called by glib when we get action on a multi socket */
-static gboolean event_cb(GIOChannel *ch, GIOCondition condition, gpointer data)
-{
- GlobalInfo *g = (GlobalInfo*) data;
- CURLMcode rc;
- int fd=g_io_channel_unix_get_fd(ch);
-
- int action =
- (condition & G_IO_IN ? CURL_CSELECT_IN : 0) |
- (condition & G_IO_OUT ? CURL_CSELECT_OUT : 0);
-
- rc = curl_multi_socket_action(g->multi, fd, action, &g->still_running);
- mcode_or_die("event_cb: curl_multi_socket_action", rc);
-
- check_multi_info(g);
- if(g->still_running) {
- return TRUE;
- } else {
- MSG_OUT("last transfer done, kill timeout\n");
- if (g->timer_event) { g_source_remove(g->timer_event); }
- return FALSE;
- }
-}
-
-
-
-/* Clean up the SockInfo structure */
-static void remsock(SockInfo *f)
-{
- if (!f) { return; }
- if (f->ev) { g_source_remove(f->ev); }
- g_free(f);
-}
-
-
-
-/* Assign information to a SockInfo structure */
-static void setsock(SockInfo*f, curl_socket_t s, CURL*e, int act, GlobalInfo*g)
-{
- GIOCondition kind =
- (act&CURL_POLL_IN?G_IO_IN:0)|(act&CURL_POLL_OUT?G_IO_OUT:0);
-
- f->sockfd = s;
- f->action = act;
- f->easy = e;
- if (f->ev) { g_source_remove(f->ev); }
- f->ev=g_io_add_watch(f->ch, kind, event_cb,g);
-
-}
-
-
-
-/* Initialize a new SockInfo structure */
-static void addsock(curl_socket_t s, CURL *easy, int action, GlobalInfo *g)
-{
- SockInfo *fdp = g_malloc0(sizeof(SockInfo));
-
- fdp->global = g;
- fdp->ch=g_io_channel_unix_new(s);
- setsock(fdp, s, easy, action, g);
- curl_multi_assign(g->multi, s, fdp);
-}
-
-
-
-/* CURLMOPT_SOCKETFUNCTION */
-static int sock_cb(CURL *e, curl_socket_t s, int what, void *cbp, void *sockp)
-{
- GlobalInfo *g = (GlobalInfo*) cbp;
- SockInfo *fdp = (SockInfo*) sockp;
- static const char *whatstr[]={ "none", "IN", "OUT", "INOUT", "REMOVE" };
-
- MSG_OUT("socket callback: s=%d e=%p what=%s ", s, e, whatstr[what]);
- if (what == CURL_POLL_REMOVE) {
- MSG_OUT("\n");
- remsock(fdp);
- } else {
- if (!fdp) {
- MSG_OUT("Adding data: %s%s\n",
- what&CURL_POLL_IN?"READ":"",
- what&CURL_POLL_OUT?"WRITE":"" );
- addsock(s, e, what, g);
- }
- else {
- MSG_OUT(
- "Changing action from %d to %d\n", fdp->action, what);
- setsock(fdp, s, e, what, g);
- }
- }
- return 0;
-}
-
-
-
-/* CURLOPT_WRITEFUNCTION */
-static size_t write_cb(void *ptr, size_t size, size_t nmemb, void *data)
-{
- size_t realsize = size * nmemb;
- ConnInfo *conn = (ConnInfo*) data;
- (void)ptr;
- (void)conn;
- return realsize;
-}
-
-
-
-/* CURLOPT_PROGRESSFUNCTION */
-static int prog_cb (void *p, double dltotal, double dlnow, double ult, double uln)
-{
- ConnInfo *conn = (ConnInfo *)p;
- MSG_OUT("Progress: %s (%g/%g)\n", conn->url, dlnow, dltotal);
- return 0;
-}
-
-
-
-/* Create a new easy handle, and add it to the global curl_multi */
-static void new_conn(char *url, GlobalInfo *g )
-{
- ConnInfo *conn;
- CURLMcode rc;
-
- conn = g_malloc0(sizeof(ConnInfo));
-
- conn->error[0]='\0';
-
- conn->easy = curl_easy_init();
- if (!conn->easy) {
- MSG_OUT("curl_easy_init() failed, exiting!\n");
- exit(2);
- }
- conn->global = g;
- conn->url = g_strdup(url);
- curl_easy_setopt(conn->easy, CURLOPT_URL, conn->url);
- curl_easy_setopt(conn->easy, CURLOPT_WRITEFUNCTION, write_cb);
- curl_easy_setopt(conn->easy, CURLOPT_WRITEDATA, &conn);
- curl_easy_setopt(conn->easy, CURLOPT_VERBOSE, (long)SHOW_VERBOSE);
- curl_easy_setopt(conn->easy, CURLOPT_ERRORBUFFER, conn->error);
- curl_easy_setopt(conn->easy, CURLOPT_PRIVATE, conn);
- curl_easy_setopt(conn->easy, CURLOPT_NOPROGRESS, SHOW_PROGRESS?0L:1L);
- curl_easy_setopt(conn->easy, CURLOPT_PROGRESSFUNCTION, prog_cb);
- curl_easy_setopt(conn->easy, CURLOPT_PROGRESSDATA, conn);
- curl_easy_setopt(conn->easy, CURLOPT_FOLLOWLOCATION, 1L);
- curl_easy_setopt(conn->easy, CURLOPT_CONNECTTIMEOUT, 30L);
- curl_easy_setopt(conn->easy, CURLOPT_LOW_SPEED_LIMIT, 1L);
- curl_easy_setopt(conn->easy, CURLOPT_LOW_SPEED_TIME, 30L);
-
- MSG_OUT("Adding easy %p to multi %p (%s)\n", conn->easy, g->multi, url);
- rc =curl_multi_add_handle(g->multi, conn->easy);
- mcode_or_die("new_conn: curl_multi_add_handle", rc);
-
- /* note that the add_handle() will set a time-out to trigger very soon so
- that the necessary socket_action() call will be called by this app */
-}
-
-
-/* This gets called by glib whenever data is received from the fifo */
-static gboolean fifo_cb (GIOChannel *ch, GIOCondition condition, gpointer data)
-{
- #define BUF_SIZE 1024
- gsize len, tp;
- gchar *buf, *tmp, *all=NULL;
- GIOStatus rv;
-
- do {
- GError *err=NULL;
- rv = g_io_channel_read_line (ch,&buf,&len,&tp,&err);
- if ( buf ) {
- if (tp) { buf[tp]='\0'; }
- new_conn(buf,(GlobalInfo*)data);
- g_free(buf);
- } else {
- buf = g_malloc(BUF_SIZE+1);
- while (TRUE) {
- buf[BUF_SIZE]='\0';
- g_io_channel_read_chars(ch,buf,BUF_SIZE,&len,&err);
- if (len) {
- buf[len]='\0';
- if (all) {
- tmp=all;
- all=g_strdup_printf("%s%s", tmp, buf);
- g_free(tmp);
- } else {
- all = g_strdup(buf);
- }
- } else {
- break;
- }
- }
- if (all) {
- new_conn(all,(GlobalInfo*)data);
- g_free(all);
- }
- g_free(buf);
- }
- if ( err ) {
- g_error("fifo_cb: %s", err->message);
- g_free(err);
- break;
- }
- } while ( (len) && (rv == G_IO_STATUS_NORMAL) );
- return TRUE;
-}
-
-
-
-
-int init_fifo(void)
-{
- struct stat st;
- const char *fifo = "hiper.fifo";
- int socket;
-
- if (lstat (fifo, &st) == 0) {
- if ((st.st_mode & S_IFMT) == S_IFREG) {
- errno = EEXIST;
- perror("lstat");
- exit (1);
- }
- }
-
- unlink (fifo);
- if (mkfifo (fifo, 0600) == -1) {
- perror("mkfifo");
- exit (1);
- }
-
- socket = open (fifo, O_RDWR | O_NONBLOCK, 0);
-
- if (socket == -1) {
- perror("open");
- exit (1);
- }
- MSG_OUT("Now, pipe some URL's into > %s\n", fifo);
-
- return socket;
-
-}
-
-
-
-
-int main(int argc, char **argv)
-{
- GlobalInfo *g;
- CURLMcode rc;
- GMainLoop*gmain;
- int fd;
- GIOChannel* ch;
- g=g_malloc0(sizeof(GlobalInfo));
-
- fd=init_fifo();
- ch=g_io_channel_unix_new(fd);
- g_io_add_watch(ch,G_IO_IN,fifo_cb,g);
- gmain=g_main_loop_new(NULL,FALSE);
- g->multi = curl_multi_init();
- curl_multi_setopt(g->multi, CURLMOPT_SOCKETFUNCTION, sock_cb);
- curl_multi_setopt(g->multi, CURLMOPT_SOCKETDATA, g);
- curl_multi_setopt(g->multi, CURLMOPT_TIMERFUNCTION, update_timeout_cb);
- curl_multi_setopt(g->multi, CURLMOPT_TIMERDATA, g);
-
- /* we don't call any curl_multi_socket*() function yet as we have no handles
- added! */
-
- g_main_loop_run(gmain);
- curl_multi_cleanup(g->multi);
- return 0;
-}
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