midori/extensions/web-cache.c

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/*
Copyright (C) 2009 Christian Dywan <christian@twotoasts.de>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
See the file COPYING for the full license text.
*/
#include <midori/midori.h>
#include <midori/sokoke.h>
#include "config.h"
#include <glib/gstdio.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#define HAVE_WEBKIT_RESOURCE_REQUEST WEBKIT_CHECK_VERSION (1, 1, 14)
static gchar*
web_cache_get_cached_path (MidoriExtension* extension,
const gchar* uri)
{
static const gchar* cache_path = NULL;
gchar* checksum;
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gchar* folder;
gchar* sub_path;
gchar* encoded;
gchar* ext;
gchar* cached_filename;
gchar* cached_path;
/* cache_path = midori_extension_get_string (extension, "path"); */
if (!cache_path)
cache_path = g_build_filename (g_get_user_cache_dir (),
PACKAGE_NAME, "web", NULL);
checksum = g_compute_checksum_for_string (G_CHECKSUM_MD5, uri, -1);
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folder = g_strdup_printf ("%c%c", checksum[0], checksum[1]);
sub_path = g_build_path (G_DIR_SEPARATOR_S, cache_path, folder, NULL);
g_mkdir (sub_path, 0700);
g_free (folder);
encoded = soup_uri_encode (uri, "/");
ext = g_strrstr (encoded, ".");
cached_filename = g_strdup_printf ("%s%s", checksum, ext ? ext : "");
g_free (encoded);
g_free (checksum);
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cached_path = g_build_filename (sub_path, cached_filename, NULL);
g_free (cached_filename);
return cached_path;
}
static gboolean
web_cache_replace_frame_uri (MidoriExtension* extension,
const gchar* uri,
WebKitWebFrame* web_frame)
{
gchar* filename;
gboolean handled = FALSE;
filename = web_cache_get_cached_path (extension, uri);
/* g_debug ("cache lookup: %s => %s", uri, filename); */
if (g_file_test (filename, G_FILE_TEST_EXISTS))
{
gchar* data;
g_file_get_contents (filename, &data, NULL, NULL);
webkit_web_frame_load_alternate_string (web_frame, data, NULL, uri);
g_free (data);
handled = TRUE;
}
g_free (filename);
return handled;
}
static gboolean
web_cache_navigation_decision_cb (WebKitWebView* web_view,
WebKitWebFrame* web_frame,
WebKitNetworkRequest* request,
WebKitWebNavigationAction* action,
WebKitWebPolicyDecision* decision,
MidoriExtension* extension)
{
const gchar* uri = webkit_network_request_get_uri (request);
if (!(uri && g_str_has_prefix (uri, "http://")))
return FALSE;
return web_cache_replace_frame_uri (extension, uri, web_frame);
}
#if WEBKIT_CHECK_VERSION (1, 1, 6)
static gboolean
web_cache_load_error_cb (WebKitWebView* web_view,
WebKitWebFrame* web_frame,
const gchar* uri,
GError* error,
MidoriExtension* extension)
{
const gchar* provisional;
if (!(uri && g_str_has_prefix (uri, "http://")))
return FALSE;
return web_cache_replace_frame_uri (extension, uri, web_frame);
}
#endif
#if HAVE_WEBKIT_RESOURCE_REQUEST
static void
web_cache_resource_request_starting_cb (WebKitWebView* web_view,
WebKitWebFrame* web_frame,
WebKitWebResource* web_resource,
WebKitNetworkRequest* request,
WebKitNetworkResponse* response,
MidoriExtension* extension)
{
const gchar* uri;
gchar* filename;
uri = webkit_network_request_get_uri (request);
if (!(uri && g_str_has_prefix (uri, "http://")))
return;
if (!(g_strcmp0 (uri, webkit_web_frame_get_uri (web_frame))
&& g_strcmp0 (webkit_web_data_source_get_unreachable_uri (webkit_web_frame_get_data_source (web_frame)), uri)))
{
web_cache_replace_frame_uri (extension, uri, web_frame);
return;
}
filename = web_cache_get_cached_path (extension, uri);
if (g_file_test (filename, G_FILE_TEST_EXISTS))
{
gchar* file_uri = g_filename_to_uri (filename, NULL, NULL);
webkit_network_request_set_uri (request, file_uri);
g_free (file_uri);
}
g_free (filename);
}
#endif
static void
web_cache_mesage_got_headers_cb (SoupMessage* msg,
MidoriExtension* extension)
{
SoupURI* soup_uri = soup_message_get_uri (msg);
gchar* uri = soup_uri ? soup_uri_to_string (soup_uri, FALSE) : g_strdup ("");
gchar* filename = web_cache_get_cached_path (extension, uri);
gchar* data;
gsize length;
/* g_debug ("cache serve: %s (%s)", uri, filename); */
/* FIXME: Inspect headers and decide whether we need to update the cache */
g_file_get_contents (filename, &data, &length, NULL);
soup_message_set_status (msg, SOUP_STATUS_OK);
/* FIXME: MIME type */
soup_message_set_request (msg, "image/jpeg", SOUP_MEMORY_TAKE, data, length);
g_signal_handlers_disconnect_by_func (msg, web_cache_mesage_got_headers_cb, extension);
soup_session_requeue_message (g_object_get_data (G_OBJECT (msg), "session"), msg);
g_free (filename);
g_free (uri);
}
static void
web_cache_mesage_got_chunk_cb (SoupMessage* msg,
SoupBuffer* chunk,
MidoriExtension* extension)
{
/* Fill the body in manually for later use, even if WebKitGTK+
disables accumulation. We should probably do this differently. */
if (!soup_message_body_get_accumulate (msg->response_body))
soup_message_body_append_buffer (msg->response_body, chunk);
}
static void
web_cache_session_request_queued_cb (SoupSession* session,
SoupMessage* msg,
MidoriExtension* extension)
{
SoupURI* soup_uri = soup_message_get_uri (msg);
gchar* uri = soup_uri ? soup_uri_to_string (soup_uri, FALSE) : g_strdup ("");
if (g_str_has_prefix (uri, "http"))
{
gchar* filename = web_cache_get_cached_path (extension, uri);
/* g_debug ("cache lookup: %d %s => %s", msg->status_code, uri, filename); */
g_object_set_data (G_OBJECT (msg), "session", session);
/* Network is unavailable, so we fallback to cache */
if (msg->status_code == SOUP_STATUS_CANT_RESOLVE)
web_cache_mesage_got_headers_cb (msg, extension);
if (g_file_test (filename, G_FILE_TEST_EXISTS))
g_signal_connect (msg, "got-headers",
G_CALLBACK (web_cache_mesage_got_headers_cb), extension);
else
g_signal_connect (msg, "got-chunk",
G_CALLBACK (web_cache_mesage_got_chunk_cb), extension);
g_free (filename);
}
g_free (uri);
}
static void
web_cache_session_request_unqueued_cb (SoupSession* session,
SoupMessage* msg,
MidoriExtension* extension)
{
SoupURI* soup_uri = soup_message_get_uri (msg);
gchar* uri = soup_uri ? soup_uri_to_string (soup_uri, FALSE) : NULL;
/* g_debug ("request unqueued: %d %s", msg->status_code, uri); */
#if !HAVE_WEBKIT_RESOURCE_REQUEST
/* Network is unavailable, so we fallback to cache */
if (msg->status_code == SOUP_STATUS_CANT_RESOLVE)
web_cache_mesage_got_headers_cb (msg, extension);
else
#endif
/* FIXME: Only store if this wasn't a cached message already */
/* FIXME: Don't store files from the res server */
if (uri && g_str_has_prefix (uri, "http"))
{
SoupMessageHeaders* hdrs = msg->response_headers;
const gchar* mime_type = soup_message_headers_get_content_type (hdrs, NULL);
/* FIXME: Don't store big files */
if (mime_type)
{
gchar* filename = web_cache_get_cached_path (extension, uri);
SoupMessageBody* body = msg->response_body;
SoupBuffer* buffer = NULL;
/* We fed the buffer manually before, so this actually works. */
if (!soup_message_body_get_accumulate (body))
{
soup_message_body_set_accumulate (body, TRUE);
buffer = soup_message_body_flatten (body);
}
/* FIXME: Update sensibly */
if (!g_file_test (filename, G_FILE_TEST_EXISTS))
if (body->length)
{
/* g_debug ("cache store: %s => %s (%d)", uri, filename, body->length); */
GError* error = NULL;
g_file_set_contents (filename, body->data, body->length, &error);
if (error)
{
g_printf ("%s\n", error->message);
g_error_free (error);
}
}
/* else
g_debug ("cache skip empty"); */
if (buffer)
soup_buffer_free (buffer);
}
/* else
g_debug ("cache skip: %s", mime_type); */
}
g_free (uri);
}
static void
web_cache_add_tab_cb (MidoriBrowser* browser,
MidoriView* view,
MidoriExtension* extension)
{
GtkWidget* web_view = gtk_bin_get_child (GTK_BIN (view));
g_signal_connect (web_view, "navigation-policy-decision-requested",
G_CALLBACK (web_cache_navigation_decision_cb), extension);
#if WEBKIT_CHECK_VERSION (1, 1, 6)
g_signal_connect (web_view, "load-error",
G_CALLBACK (web_cache_load_error_cb), extension);
#endif
#if HAVE_WEBKIT_RESOURCE_REQUEST
g_signal_connect (web_view, "resource-request-starting",
G_CALLBACK (web_cache_resource_request_starting_cb), extension);
#endif
}
static void
web_cache_deactivate_cb (MidoriExtension* extension,
MidoriBrowser* browser);
static void
web_cache_add_tab_foreach_cb (MidoriView* view,
MidoriBrowser* browser,
MidoriExtension* extension)
{
web_cache_add_tab_cb (browser, view, extension);
}
static void
web_cache_app_add_browser_cb (MidoriApp* app,
MidoriBrowser* browser,
MidoriExtension* extension)
{
midori_browser_foreach (browser,
(GtkCallback)web_cache_add_tab_foreach_cb, extension);
g_signal_connect (browser, "add-tab",
G_CALLBACK (web_cache_add_tab_cb), extension);
g_signal_connect (extension, "deactivate",
G_CALLBACK (web_cache_deactivate_cb), browser);
}
static void
web_cache_deactivate_tabs (MidoriView* view,
MidoriExtension* extension)
{
GtkWidget* web_view = gtk_bin_get_child (GTK_BIN (view));
MidoriBrowser* browser = midori_browser_get_for_widget (web_view);
g_signal_handlers_disconnect_by_func (
browser, web_cache_add_tab_cb, 0);
#if HAVE_WEBKIT_RESOURCE_REQUEST
g_signal_handlers_disconnect_by_func (
web_view, web_cache_resource_request_starting_cb, extension);
#endif
g_signal_handlers_disconnect_by_func (
webkit_get_default_session (), web_cache_session_request_queued_cb, extension);
}
static void
web_cache_deactivate_cb (MidoriExtension* extension,
MidoriBrowser* browser)
{
MidoriApp* app = midori_extension_get_app (extension);
g_signal_handlers_disconnect_by_func (
extension, web_cache_deactivate_cb, browser);
g_signal_handlers_disconnect_by_func (
app, web_cache_app_add_browser_cb, extension);
midori_browser_foreach (browser, (GtkCallback)web_cache_deactivate_tabs, extension);
}
static void
web_cache_activate_cb (MidoriExtension* extension,
MidoriApp* app)
{
KatzeArray* browsers;
MidoriBrowser* browser;
guint i;
SoupSession* session = webkit_get_default_session ();
g_signal_connect (session, "request-queued",
G_CALLBACK (web_cache_session_request_queued_cb), extension);
g_signal_connect (session, "request-unqueued",
G_CALLBACK (web_cache_session_request_unqueued_cb), extension);
browsers = katze_object_get_object (app, "browsers");
i = 0;
while ((browser = katze_array_get_nth_item (browsers, i++)))
web_cache_app_add_browser_cb (app, browser, extension);
g_signal_connect (app, "add-browser",
G_CALLBACK (web_cache_app_add_browser_cb), extension);
g_object_unref (browsers);
}
MidoriExtension*
extension_init (void)
{
gchar* cache_path = g_build_filename (g_get_user_cache_dir (),
PACKAGE_NAME, "web", NULL);
MidoriExtension* extension = g_object_new (MIDORI_TYPE_EXTENSION,
"name", _("Web Cache"),
"description", _("Cache HTTP communication on disk"),
"version", "0.1",
"authors", "Christian Dywan <christian@twotoasts.de>",
NULL);
midori_extension_install_string (extension, "path", cache_path);
midori_extension_install_integer (extension, "size", 50);
g_free (cache_path);
g_signal_connect (extension, "activate",
G_CALLBACK (web_cache_activate_cb), NULL);
return extension;
}