David Odin (aka DindinX) for MandrakeSoft, tiny example with GTK

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;
+}
+