scripts: refactor some examples that keep global state

We now have a better way to do this.

1 files changed, 11 insertions, 9 deletions

diff --git a/examples/filt.py b/examples/filt.py
index 21744edd..9ccf9fa1 100644
--- a/examples/filt.py
+++ b/examples/filt.py
@@ -1,18 +1,20 @@
-# This scripts demonstrates how to use mitmproxy's filter pattern in inline scripts.
+# This scripts demonstrates how to use mitmproxy's filter pattern in scripts.
 # Usage: mitmdump -s "filt.py FILTER"
 import sys
 from mitmproxy import filt
 
-state = {}
+
+class Filter:
+    def __init__(self, spec):
+        self.filter = filt.parse(spec)
+
+    def response(self, flow):
+        if flow.match(self.filter):
+            print("Flow matches filter:")
+            print(flow)
 
 
 def start():
     if len(sys.argv) != 2:
         raise ValueError("Usage: -s 'filt.py FILTER'")
-    state["filter"] = filt.parse(sys.argv[1])
-
-
-def response(flow):
-    if flow.match(state["filter"]):
-        print("Flow matches filter:")
-        print(flow)
+    return Filter(sys.argv[1])