curl/docs/examples/curlgtk.c

/* curlgtk.c */
/* Copyright (c) 2000 David Odin (aka DindinX) for MandrakeSoft */
/* an attempt to use the curl library in concert with a gtk-threaded application */

#include <stdio.h>
#include <gtk/gtk.h>

#include <curl/curl.h>
#include <curl/types.h> /* new for v7 */
#include <curl/easy.h> /* new for v7 */

#include <pthread.h>

GtkWidget *Bar;

size_t my_read_func(void *ptr, size_t size, size_t nmemb, FILE *stream)
{
  return fread(ptr, size, nmemb, stream);
}

int my_progress_func(GtkWidget *Bar, int t, int d)
{
/*  printf("%d / %d (%g %%)\n", d, t, d*100.0/t);*/
  gdk_threads_enter();
  gtk_progress_set_value(GTK_PROGRESS(Bar), d*100.0/t);
  gdk_threads_leave();
  return 0;
}

void *curl_thread(void *ptr)
{
  CURL *curl;
  CURLcode res;
  FILE *outfile;
  gchar *url = ptr;
  
  curl = curl_easy_init();
  if(curl)
  {
    outfile = fopen("/tmp/test.curl", "w");

    curl_easy_setopt(curl, CURLOPT_URL, url);
    curl_easy_setopt(curl, CURLOPT_FILE, outfile);
    curl_easy_setopt(curl, CURLOPT_READFUNCTION, my_read_func);
    curl_easy_setopt(curl, CURLOPT_PROGRESSFUNCTION, my_progress_func);
    curl_easy_setopt(curl, CURLOPT_PROGRESSDATA, Bar);
    
    res = curl_easy_perform(curl);

    fclose(outfile);
    /* always cleanup */
    curl_easy_cleanup(curl);
  }
  return NULL;
}

int main(int argc, char **argv)
{
  GtkWidget *Window, *Frame, *Frame2;
  GtkAdjustment *adj;
  pthread_t curl_tid;

  /* Init thread */
  g_thread_init(NULL);
  
  gtk_init(&argc, &argv);
  Window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
  Frame = gtk_frame_new(NULL);
  gtk_frame_set_shadow_type(GTK_FRAME(Frame), GTK_SHADOW_OUT);
  gtk_container_add(GTK_CONTAINER(Window), Frame);
  Frame2 = gtk_frame_new(NULL);
  gtk_frame_set_shadow_type(GTK_FRAME(Frame2), GTK_SHADOW_IN);
  gtk_container_add(GTK_CONTAINER(Frame), Frame2);
  gtk_container_set_border_width(GTK_CONTAINER(Frame2), 5);
  adj = (GtkAdjustment*)gtk_adjustment_new(0, 0, 100, 0, 0, 0);
  Bar = gtk_progress_bar_new_with_adjustment(adj);
  gtk_container_add(GTK_CONTAINER(Frame2), Bar);
  gtk_widget_show_all(Window);

  pthread_create(&curl_tid, NULL, curl_thread, argv[1]);
    
  gdk_threads_enter();
  gtk_main();
  gdk_threads_leave();
  return 0;
}