Open JSON file in text mode

examples/har_dump.py

@@ -120,7 +120,7 @@ def done():
         mitmproxy.ctx.log(pprint.pformat(HAR))
     # TODO: .zhar compression
     else:
-        with open(dump_file, "wb") as f:
+        with open(dump_file, "w") as f:
             f.write(json.dumps(HAR, indent=2))
 
     # TODO: Log results via mitmproxy.ctx.log

test/mitmproxy/test_examples.py

@@ -128,7 +128,7 @@ class TestHARDump(mastertest.MasterTest):
             self.invoke(m, "response", self.req_get)
             m.addons.remove(sc)
 
-            with open(path, "rb") as inp:
+            with open(path, "r") as inp:
                 har = json.load(inp)
 
         assert len(har["log"]["entries"]) == 1