euscan: shake the code

- add custom site handlers
- use a custom user agent
- fix some bugs in management commands

Signed-off-by: Corentin Chary <corentincj@iksaif.net>

pym/euscan/handlers/__init__.py

@@ -0,0 +1,24 @@
+from euscan.handlers import generic
+from euscan.handlers import php
+from euscan.handlers import pypi
+from euscan.handlers import rubygem
+
+handlers = [ php, pypi, rubygem, generic ]
+
+def find_best_handler(cpv, url):
+    for handler in handlers:
+        if handler.can_handle(cpv, url):
+            return handler
+    return None
+
+def scan(cpv, url):
+    handler = find_best_handler(cpv, url)
+    if handler:
+        return handler.scan(cpv, url)
+    return []
+
+def brute_force(cpv, url):
+    handler = find_best_handler(cpv, url)
+    if handler:
+        return handler.brute_force(cpv, url)
+    return []