Add a network disk cache.

qutebrowser/app.py

@@ -39,7 +39,7 @@ from qutebrowser.commands import userscripts, runners, cmdutils
 from qutebrowser.config import (style, config, websettings, iniparsers,
                                 lineparser, configtypes)
 from qutebrowser.network import qutescheme, proxy
-from qutebrowser.browser import quickmarks, cookies, downloads
+from qutebrowser.browser import quickmarks, cookies, downloads, cache
 from qutebrowser.widgets import mainwindow, console, crash
 from qutebrowser.keyinput import modeparsers, keyparser, modeman
 from qutebrowser.utils import (log, version, message, utilcmds, readline,
@@ -62,6 +62,7 @@ class Application(QApplication):
         messagebridge: The global MessageBridge instance.
         modeman: The global ModeManager instance.
         cookiejar: The global CookieJar instance.
+        cache: The global DiskCache instance.
         rl_bridge: The ReadlineBridge being used.
         args: ArgumentParser instance.
         _keyparsers: A mapping from modes to keyparsers.
@@ -127,6 +128,8 @@ class Application(QApplication):
         utilcmds.init()
         log.init.debug("Initializing cookies...")
         self.cookiejar = cookies.CookieJar(self)
+        log.init.debug("Initializing cache...")
+        self.cache = cache.DiskCache(self)
         log.init.debug("Initializing commands...")
         self.commandrunner = runners.CommandRunner()
         log.init.debug("Initializing search...")

qutebrowser/browser/cache.py

@@ -0,0 +1,39 @@
+# vim: ft=python fileencoding=utf-8 sts=4 sw=4 et:
+
+# Copyright 2014 Florian Bruhin (The Compiler) <mail@qutebrowser.org>
+#
+# This file is part of qutebrowser.
+#
+# qutebrowser is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# qutebrowser is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with qutebrowser.  If not, see <http://www.gnu.org/licenses/>.
+
+"""HTTP network cache."""
+
+import os.path
+
+from PyQt5.QtCore import QStandardPaths
+from PyQt5.QtNetwork import QNetworkDiskCache
+
+from qutebrowser.config import config
+from qutebrowser.utils import utils
+
+
+class DiskCache(QNetworkDiskCache):
+
+    """Disk cache which sets correct cache dir and size."""
+
+    def __init__(self, parent=None):
+        super().__init__(parent)
+        cache_dir = utils.get_standard_dir(QStandardPaths.CacheLocation)
+        self.setCacheDirectory(os.path.join(cache_dir, 'http'))
+        self.setMaximumCacheSize(config.get('storage', 'cache-size'))

qutebrowser/config/configdata.py

@@ -479,6 +479,10 @@ DATA = collections.OrderedDict([
         ('local-storage',
          SettingValue(typ.Bool(), 'true'),
          "Whether support for the HTML 5 local storage feature is enabled."),
+
+        ('cache-size',
+         SettingValue(typ.Int(minval=0, maxval=MAXVALS['int64']), '52428800'),
+         "Size of the HTTP network cache."),
     )),
 
     ('permissions', sect.KeyValue(

qutebrowser/network/networkmanager.py

@@ -51,12 +51,13 @@ class NetworkManager(QNetworkAccessManager):
         self._scheme_handlers = {
             'qute': qutescheme.QuteSchemeHandler(),
         }
-        cookiejar = QCoreApplication.instance().cookiejar
-        parent = cookiejar.parent()
-        self.setCookieJar(cookiejar)
-        # We have a shared cookie jar, so we don't want the NetworkManager to
-        # take ownership of the CookieJar.
-        cookiejar.setParent(parent)
+        app = QCoreApplication.instance()
+        self.setCookieJar(app.cookiejar)
+        self.setCache(app.cache)
+        # We have a shared cookie jar and cache , so we don't want the
+        # NetworkManager to take ownership of them.
+        app.cookiejar.setParent(app)
+        app.cache.setParent(app)
         if SSL_AVAILABLE:
             self.sslErrors.connect(self.on_ssl_errors)
         self.authenticationRequired.connect(self.on_authentication_required)