예제 #1
0
/**
 * gs_screenshot_image_load_async:
 **/
void
gs_screenshot_image_load_async (GsScreenshotImage *ssimg,
				GCancellable *cancellable)
{
	AsImage *im = NULL;
	GsScreenshotImagePrivate *priv;
	SoupURI *base_uri = NULL;
	const gchar *url;
	gint rc;
	_cleanup_free_ gchar *basename = NULL;
	_cleanup_free_ gchar *cachedir2 = NULL;
	_cleanup_free_ gchar *cachedir = NULL;
	_cleanup_free_ gchar *sizedir = NULL;

	g_return_if_fail (GS_IS_SCREENSHOT_IMAGE (ssimg));

	priv = gs_screenshot_image_get_instance_private (ssimg);

	g_return_if_fail (AS_IS_SCREENSHOT (priv->screenshot));
	g_return_if_fail (priv->width != 0);
	g_return_if_fail (priv->height != 0);

	/* load an image according to the scale factor */
	priv->scale = gtk_widget_get_scale_factor (GTK_WIDGET (ssimg));
	im = as_screenshot_get_image (priv->screenshot,
				      priv->width * priv->scale,
				      priv->height * priv->scale);

	/* if we've failed to load a HiDPI image, fallback to LoDPI */
	if (im == NULL && priv->scale > 1) {
		priv->scale = 1;
		im = as_screenshot_get_image (priv->screenshot,
					      priv->width,
					      priv->height);
	}
	if (im == NULL) {
		/* TRANSLATORS: this is when we request a screenshot size that
		 * the generator did not create or the parser did not add */
		gs_screenshot_image_set_error (ssimg, _("Screenshot size not found"));
		return;
	}
	url = as_image_get_url (im);
	basename = g_path_get_basename (url);
	if (priv->width == G_MAXUINT || priv->height == G_MAXUINT) {
		sizedir = g_strdup ("unknown");
	} else {
		sizedir = g_strdup_printf ("%ux%u", priv->width * priv->scale, priv->height * priv->scale);
	}
	cachedir = g_build_filename (priv->cachedir,
				     "gnome-software",
				     "screenshots",
				     sizedir,
				     NULL);
	rc = g_mkdir_with_parents (cachedir, 0700);
	if (rc != 0) {
		/* TRANSLATORS: this is when we try create the cache directory
		 * but we were out of space or permission was denied */
		gs_screenshot_image_set_error (ssimg, _("Could not create cache"));
		return;
	}

	/* does local file already exist */
	priv->filename = g_build_filename (cachedir, basename, NULL);
	if (g_file_test (priv->filename, G_FILE_TEST_EXISTS)) {
		as_screenshot_show_image (ssimg);
		return;
	}

	/* can we load a blurred smaller version of this straight away */
	if (priv->width > AS_IMAGE_THUMBNAIL_WIDTH &&
	    priv->height > AS_IMAGE_THUMBNAIL_HEIGHT) {
		cachedir2 = g_build_filename (priv->cachedir,
					      "gnome-software",
					      "screenshots",
					      "112x63",
					      basename,
					      NULL);
		if (g_file_test (cachedir2, G_FILE_TEST_EXISTS))
			gs_screenshot_image_show_blurred (ssimg, cachedir2);
	}

	/* download file */
	g_debug ("downloading %s to %s", url, priv->filename);
	base_uri = soup_uri_new (url);
	if (base_uri == NULL || !SOUP_URI_VALID_FOR_HTTP (base_uri)) {
		/* TRANSLATORS: this is when we try to download a screenshot
		 * that was not a valid URL */
		gs_screenshot_image_set_error (ssimg, _("Screenshot not valid"));
		soup_uri_free (base_uri);
		return;
	}

	/* cancel any previous messages */
	if (priv->message != NULL) {
		soup_session_cancel_message (priv->session,
		                             priv->message,
		                             SOUP_STATUS_CANCELLED);
		g_clear_object (&priv->message);
	}

	priv->message = soup_message_new_from_uri (SOUP_METHOD_GET, base_uri);
	if (priv->message == NULL) {
		/* TRANSLATORS: this is when networking is not available */
		gs_screenshot_image_set_error (ssimg, _("Screenshot not available"));
		soup_uri_free (base_uri);
		return;
	}

	/* send async */
	soup_session_queue_message (priv->session,
				    g_object_ref (priv->message) /* transfer full */,
				    gs_screenshot_image_complete_cb,
				    g_object_ref (ssimg));
	soup_uri_free (base_uri);
}
예제 #2
0
void
gs_screenshot_image_load_async (GsScreenshotImage *ssimg,
				GCancellable *cancellable)
{
	AsImage *im = NULL;
	const gchar *url;
	g_autofree gchar *basename = NULL;
	g_autofree gchar *cache_kind = NULL;
	g_autofree gchar *cachefn_thumb = NULL;
	g_autofree gchar *sizedir = NULL;
	g_autoptr(SoupURI) base_uri = NULL;

	g_return_if_fail (GS_IS_SCREENSHOT_IMAGE (ssimg));

	g_return_if_fail (AS_IS_SCREENSHOT (ssimg->screenshot));
	g_return_if_fail (ssimg->width != 0);
	g_return_if_fail (ssimg->height != 0);

	/* load an image according to the scale factor */
	ssimg->scale = (guint) gtk_widget_get_scale_factor (GTK_WIDGET (ssimg));
	im = as_screenshot_get_image (ssimg->screenshot,
				      ssimg->width * ssimg->scale,
				      ssimg->height * ssimg->scale);

	/* if we've failed to load a HiDPI image, fallback to LoDPI */
	if (im == NULL && ssimg->scale > 1) {
		ssimg->scale = 1;
		im = as_screenshot_get_image (ssimg->screenshot,
					      ssimg->width,
					      ssimg->height);
	}
	if (im == NULL) {
		/* TRANSLATORS: this is when we request a screenshot size that
		 * the generator did not create or the parser did not add */
		gs_screenshot_image_set_error (ssimg, _("Screenshot size not found"));
		return;
	}

	/* check if the URL points to a local file */
	url = as_image_get_url (im);
	if (g_str_has_prefix (url, "file://")) {
		g_free (ssimg->filename);
		ssimg->filename = g_strdup (url + 7);
		if (g_file_test (ssimg->filename, G_FILE_TEST_EXISTS)) {
			as_screenshot_show_image (ssimg);
			return;
		}
	}

	basename = gs_screenshot_get_cachefn_for_url (url);
	if (ssimg->width == G_MAXUINT || ssimg->height == G_MAXUINT) {
		sizedir = g_strdup ("unknown");
	} else {
		sizedir = g_strdup_printf ("%ux%u", ssimg->width * ssimg->scale, ssimg->height * ssimg->scale);
	}
	cache_kind = g_build_filename ("screenshots", sizedir, NULL);
	g_free (ssimg->filename);
	ssimg->filename = gs_utils_get_cache_filename (cache_kind,
						       basename,
						       GS_UTILS_CACHE_FLAG_NONE,
						       NULL);
	if (ssimg->filename == NULL) {
		/* TRANSLATORS: this is when we try create the cache directory
		 * but we were out of space or permission was denied */
		gs_screenshot_image_set_error (ssimg, _("Could not create cache"));
		return;
	}

	/* does local file already exist and has recently been downloaded */
	if (g_file_test (ssimg->filename, G_FILE_TEST_EXISTS)) {
		guint64 age_max;
		g_autoptr(GFile) file = NULL;

		/* show the image we have in cache while we're checking for the
		 * new screenshot (which probably won't have changed) */
		as_screenshot_show_image (ssimg);

		/* verify the cache age against the maximum allowed */
		age_max = g_settings_get_uint (ssimg->settings,
					       "screenshot-cache-age-maximum");
		file = g_file_new_for_path (ssimg->filename);
		/* image new enough, not re-requesting from server */
		if (age_max > 0 && gs_utils_get_file_age (file) < age_max)
			return;
	}

	/* if we're not showing a full-size image, we try loading a blurred
	 * smaller version of it straight away */
	if (!ssimg->showing_image &&
	    ssimg->width > AS_IMAGE_THUMBNAIL_WIDTH &&
	    ssimg->height > AS_IMAGE_THUMBNAIL_HEIGHT) {
		const gchar *url_thumb;
		g_autofree gchar *basename_thumb = NULL;
		g_autofree gchar *cache_kind_thumb = NULL;
		im = as_screenshot_get_image (ssimg->screenshot,
					      AS_IMAGE_THUMBNAIL_WIDTH * ssimg->scale,
					      AS_IMAGE_THUMBNAIL_HEIGHT * ssimg->scale);
		url_thumb = as_image_get_url (im);
		basename_thumb = gs_screenshot_get_cachefn_for_url (url_thumb);
		cache_kind_thumb = g_build_filename ("screenshots", "112x63", NULL);
		cachefn_thumb = gs_utils_get_cache_filename (cache_kind_thumb,
							     basename_thumb,
							     GS_UTILS_CACHE_FLAG_NONE,
							     NULL);
		if (cachefn_thumb == NULL)
			return;
		if (g_file_test (cachefn_thumb, G_FILE_TEST_EXISTS))
			gs_screenshot_image_show_blurred (ssimg, cachefn_thumb);
	}

	/* re-request the cache filename, which might be different as it needs
	 * to be writable this time */
	g_free (ssimg->filename);
	ssimg->filename = gs_utils_get_cache_filename (cache_kind,
						       basename,
						       GS_UTILS_CACHE_FLAG_WRITEABLE,
						       NULL);

	/* download file */
	g_debug ("downloading %s to %s", url, ssimg->filename);
	base_uri = soup_uri_new (url);
	if (base_uri == NULL || !SOUP_URI_VALID_FOR_HTTP (base_uri)) {
		/* TRANSLATORS: this is when we try to download a screenshot
		 * that was not a valid URL */
		gs_screenshot_image_set_error (ssimg, _("Screenshot not valid"));
		return;
	}

	/* cancel any previous messages */
	if (ssimg->message != NULL) {
		soup_session_cancel_message (ssimg->session,
		                             ssimg->message,
		                             SOUP_STATUS_CANCELLED);
		g_clear_object (&ssimg->message);
	}

	ssimg->message = soup_message_new_from_uri (SOUP_METHOD_GET, base_uri);
	if (ssimg->message == NULL) {
		/* TRANSLATORS: this is when networking is not available */
		gs_screenshot_image_set_error (ssimg, _("Screenshot not available"));
		return;
	}

	/* not all servers support If-Modified-Since, but worst case we just
	 * re-download the entire file again every 30 days */
	if (g_file_test (ssimg->filename, G_FILE_TEST_EXISTS)) {
		g_autoptr(GFile) file = g_file_new_for_path (ssimg->filename);
		gs_screenshot_soup_msg_set_modified_request (ssimg->message, file);
	}

	/* send async */
	soup_session_queue_message (ssimg->session,
				    g_object_ref (ssimg->message) /* transfer full */,
				    gs_screenshot_image_complete_cb,
				    g_object_ref (ssimg));
}