我想知道是否有办法知道webkitdownload何时完成且没有错误。我正在使用C API。我希望发出一个信号（类似于下载开始的时候），但似乎并非如此。
搜索webkit API索引，我看不到可能相关的信号： http://webkitgtk.org/reference/index-all.html
我必须真正轮询每个webkit下载，直到它完成吗？
干杯
答案 0 :(得分：4)
下载完成后会发出一个信号。信号是WebKitWebView“加载完成”，您还可以在对象WebKitWebView中监视“加载状态”的属性更改。
以下C代码向您展示如何：
#include <gtk/gtk.h>
#include <webkit/webkit.h>
static void destroy_cb(GtkWidget* widget, gpointer data) {
gtk_main_quit();
}
static void load_finished_cb(WebKitWebView *web_view, WebKitWebFrame *web_frame, gpointer data) {
printf("Finished downloading %s\n", webkit_web_view_get_uri(web_view));
}
static void load_status_cb(GObject* object, GParamSpec* pspec, gpointer data) {
WebKitWebView *web_view;
WebKitLoadStatus status;
const gchar *uri;
web_view = WEBKIT_WEB_VIEW(object);
status = webkit_web_view_get_load_status(web_view);
uri = webkit_web_view_get_uri(web_view);
switch (status) {
case WEBKIT_LOAD_PROVISIONAL:
printf("Load provisional: %s\n", uri);
break;
case WEBKIT_LOAD_COMMITTED:
printf("Load commited: %s\n", uri);
break;
case WEBKIT_LOAD_FIRST_VISUALLY_NON_EMPTY_LAYOUT:
printf("Load first visually non empty layout: %s\n", uri);
break;
case WEBKIT_LOAD_FINISHED:
printf("Load finished: %s\n", uri);
break;
default:
g_assert_not_reached();
}
}
int main(int argc, char* argv[]) {
const char *uri;
GtkWidget* window;
WebKitWebView* web_view;
gtk_init(&argc, &argv);
if (argc == 1) {
printf("Usage: URI\n");
return 1;
}
uri = argv[1];
if(!g_thread_supported())
g_thread_init(NULL);
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_default_size(GTK_WINDOW(window), 600, 400);
g_signal_connect(window, "destroy", G_CALLBACK(destroy_cb), NULL);
web_view = web_view = WEBKIT_WEB_VIEW(webkit_web_view_new());
webkit_web_view_set_transparent(web_view, TRUE);
/* Register a callback that gets invoked each time that a page is finished downloading */
g_signal_connect(web_view, "load-finished", G_CALLBACK(load_finished_cb), NULL);
/* Register a callback that gets invoked each time that the load status changes */
g_object_connect(web_view, "signal::notify::load-status", G_CALLBACK(load_status_cb), NULL);
webkit_web_view_load_uri(web_view, uri);
gtk_container_add(GTK_CONTAINER(window), GTK_WIDGET(web_view));
gtk_widget_grab_focus(GTK_WIDGET(web_view));
gtk_widget_show_all(window);
gtk_main();
return 0;
}
答案 1 :(得分：2)
您可以使用“下载请求的”WebView信号来获取WebKitDownload。然后使用“通知”WebKitDownload信号，就像使用WebView的加载状态更改一样。
我在Python中遇到过这个问题，所以我会从下面的错误翻译开始。
def on_download_requested(webview, download):
#set the destination uri (downloads folder, etc)
...
#connect the status change handler
download.connect('notify::status', on_download_status_change)
return True
def on_download_status_change(download, status):
#get the status from download, since the provided status is a little weird
#(i think this is specific to the binding)
if download.get_status().value_name == 'WEBKIT_DOWNLOAD_STATUS_ERROR':
#error handling
...
elif download.get_status().value_name == 'WEBKIT_DOWNLOAD_STATUS_FINISHED':
#the download is finished!
...
else:
...
或者，修改@ potyl对C版本的答案......看起来非常简单。
#include <gtk/gtk.h>
#include <webkit/webkit.h>
static void destroy_cb(GtkWidget* widget, gpointer data) {
gtk_main_quit();
}
static void download_status_cb(GObject* object, GParamSpec* pspec, gpointer data){ //WebKitDownload *download, GObject* object, GParamSpec* pspec, gpointer data) {
WebKitDownload *download;
WebKitDownloadStatus status;
concst gchar *uri;
download = WEBKIT_DOWNLOAD(object);
status = webkit_download_get_status(download);
uri = webkit_download_get_uri(download):
switch (status) {
case WEBKIT_DOWNLOAD_STATUS_ERROR:
printf("download error: %s\n", uri);
break;
case WEBKIT_DOWNLOAD_STATUS_CREATED:
printf("download created: %s\n", uri);
break;
case WEBKIT_DOWNLOAD_STATUS_STARTED:
printf("download started: %s\n", uri);
break;
case WEBKIT_DOWNLOAD_STATUS_CANCELLED:
printf("download cancelled: %s\n", uri);
break;
case WEBKIT_DOWNLOAD_STATUS_FINISHED:
printf("download finished!: %s\n", uri);
break;
default:
g_assert_not_reached();
}
}
static void download_requested_cb(WebKitWebView *web_view, WebKitDownload *download) {
const char *filename;
//note that if the suggested filename has spaces, it'll cause trouble below
filename = webkit_download_get_suggested_filename();
//set the destination uri (eg, send the file to a downloads folder)
webkit_download_set_destination_uri(download,"file:///some/place/for/your/Downloads/test.mp3");
//connect the status callback
g_object_connect(download, "signal::notify::status", G_CALLBACK(download_status_cb), NULL);
return true; //if we return false, the download will be cancelled
}
int main(int argc, char* argv[]) {
const char *uri;
GtkWidget* window;
WebKitWebView* web_view;
gtk_init(&argc, &argv);
if (argc == 1) {
printf("Usage: URI\n");
return 1;
}
uri = argv[1];
if(!g_thread_supported())
g_thread_init(NULL);
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_default_size(GTK_WINDOW(window), 600, 400);
g_signal_connect(window, "destroy", G_CALLBACK(destroy_cb), NULL);
web_view = web_view = WEBKIT_WEB_VIEW(webkit_web_view_new());
webkit_web_view_set_transparent(web_view, TRUE);
/* Register a callback that gets invoked each time that a page is finished downloading */
g_signal_connect(web_view, "load-finished", G_CALLBACK(load_finished_cb), NULL);
/* Register a callback that gets invoked each time a download is requested */
g_object_connect(web_view, "download-requested", G_CALLBACK(download_requested_cb), NULL);
webkit_web_view_load_uri(web_view, uri);
gtk_container_add(GTK_CONTAINER(window), GTK_WIDGET(web_view));
gtk_widget_grab_focus(GTK_WIDGET(web_view));
gtk_widget_show_all(window);
gtk_main();
return 0;
}
希望丑陋的，未经测试的C翻译有助于：）
答案 2 :(得分：0)
看起来你需要手动poll the WebKitDownload：
WebKitDownloadStatus s = webkit_download_get_status(downloader);
if(s == WEBKIT_DOWNLOAD_STATUS_FINISHED) {
/* The download has successfully finished. */
}
else if(s == WEBKIT_DOWNLOAD_STATUS_STARTED) {
/* Still going, 100*webkit_download_get_progress(downloader) percent complete. */
}