HTTP Inspector

HTTP Inspector listener filter allows detecting whether the application protocol appears to be HTTP, and if it is HTTP, it detects the HTTP protocol (HTTP/1.x or HTTP/2) further. This can be used to select a FilterChain via the application_protocols of a FilterChainMatch.

Example

A sample filter configuration could be:

listener_filters:
  - name: "envoy.filters.listener.http_inspector"
    typed_config:
      "@type": type.googleapis.com/envoy.extensions.filters.listener.http_inspector.v3.HttpInspector

Statistics

This filter has a statistics tree rooted at http_inspector with the following statistics:

Name

Type

Description

read_error

Counter

Total read errors

http10_found

Counter

Total number of times HTTP/1.0 was found

http11_found

Counter

Total number of times HTTP/1.1 was found

http2_found

Counter

Total number of times HTTP/2 was found

http_not_found

Counter

Total number of times HTTP protocol was not found