feat: add proxy template origin field and implement socket utilities for log streaming

templates/http-block-suspicious-methods.yaml

@@ -0,0 +1,35 @@
+id: http-block-suspicious-methods
+name: Block suspicious HTTP methods
+protocol: http
+description: Denies uncommon or dangerous HTTP methods.
+category: http
+family: web-hardening
+tags:
+- method-filter
+- web
+- block
+action: block
+summary: Denies uncommon or dangerous HTTP methods.
+behavior: Returns 405 Method Not Allowed for methods outside the allowlist and logs
+  the blocked method and target URL.
+source_url: https://docs.mitmproxy.org/stable/addons/examples/
+code: |
+  import logging
+
+  from mitmproxy import http
+
+  ALLOWED_METHODS = {"GET", "POST", "HEAD"}
+
+
+  def request(flow: http.HTTPFlow) -> None:
+      if flow.request.method not in ALLOWED_METHODS:
+          logging.warning(
+              "[http-block-suspicious-methods] blocked method=%s url=%s",
+              flow.request.method,
+              flow.request.pretty_url,
+          )
+          flow.response = http.Response.make(
+              405,
+              b"",
+              {"allow": "GET, POST, HEAD"},
+          )