add proxy.py

closes #67

modules/proxy.py

@@ -0,0 +1,40 @@
+import typing, urllib.parse
+import socks
+from src import ModuleManager, utils
+
+TYPES = {
+    "socks4": socks.SOCKS4,
+    "socks5": socks.SOCKS5,
+    "http": socks.HTTP
+}
+
+class ProxySetting(utils.Setting):
+    def parse(self, value: str) -> typing.Any:
+        parsed = urllib.parse.urlparse(value)
+        if parsed.scheme in TYPES and parsed.hostname:
+            return value
+
+@utils.export("serverset", ProxySetting("proxy",
+    "Proxy configuration for the current server",
+    example="socks5://localhost:9050"))
+class Module(ModuleManager.BaseModule):
+    @utils.hook("preprocess.connect")
+    def new_server(self, event):
+        proxy = event["server"].get_setting("proxy", None)
+        if proxy:
+            proxy_parsed = urllib.parse.urlparse(proxy)
+            type = TYPES.get(proxy_parsed.scheme)
+
+            if type == None:
+                raise ValueError("Invalid proxy type '%s' for '%s'" %
+                    (proxy_parsed.scheme, str(event["server"])))
+
+            event["server"].socket._make_socket = self._socket_factory(
+                type, proxy_parsed.hostname, proxy_parsed.port)
+
+    def _socket_factory(self, ptype, phost, pport):
+        return lambda host, port, bind, timeout: self._make_socket(
+            ptype, phost, pport, host, port, bind, timeout)
+    def _make_socket(self, ptype, phost, pport, host, port, bind, timeout):
+        return socks.create_connection((host, port), 20, bind,
+            ptype, phost, pport)

requirements.txt

@@ -3,6 +3,7 @@ dnspython
 feedparser
 lxml
 netifaces
+PySocks
 requests
 scrypt
 suds-jurko