Proxy with query parameters

README.md

Without the right query param:

○ → curl -v localhost:80/mge?serviceName=SessionManagerSP
*   Trying ::1...
* TCP_NODELAY set
* Connected to localhost (::1) port 80 (#0)
> GET /mge?serviceName=SessionManagerSP HTTP/1.1
> Host: localhost
> User-Agent: curl/7.64.1
> Accept: */*
> 
< HTTP/1.1 404 Not Found
< date: Wed, 26 May 2021 17:19:14 GMT
< server: envoy
< content-length: 0
< 
* Connection #0 to host localhost left intact
* Closing connection 0

With the right query param:

○ → curl -v localhost:80/mge?serviceName=SessionManagerSP.getCoreSessions
*   Trying ::1...
* TCP_NODELAY set
* Connected to localhost (::1) port 80 (#0)
> GET /mge?serviceName=SessionManagerSP.getCoreSessions HTTP/1.1
> Host: localhost
> User-Agent: curl/7.64.1
> Accept: */*
> 
< HTTP/1.1 200 OK
< date: Wed, 26 May 2021 17:17:55 GMT
< content-type: application/json; charset=utf-8
< content-length: 489
< etag: W/"1e9-euzX3lIS/m+3qcfZ7BXUqtBk+DM"
< vary: Accept-Encoding
< set-cookie: sails.sid=s%3ARA4vd8CsUanLgI-fVZuYUj0doNx-I-Er.oLNI%2B59%2FUQfrg4ZI4srvjKEa0Do4IND5gCanBBSbt90; Path=/; HttpOnly
< x-envoy-upstream-service-time: 223
< server: envoy
< 
* Connection #0 to host localhost left intact
{"args":{"serviceName":"SessionManagerSP.getCoreSessions"},"headers":{"x-forwarded-proto":"http","x-forwarded-port":"80","host":"localhost","x-amzn-trace-id":"Root=1-60ae82c3-4da1a9122162019b3ec59e0f","user-agent":"curl/7.64.1","accept":"*/*","x-request-id":"f4630113-8d54-4c42-9b10-96300676a5dd","x-envoy-expected-rq-timeout-ms":"15000","x-envoy-original-path":"/mge?serviceName=SessionManagerSP.getCoreSessions"},"url":"http://localhost/get?serviceName=SessionManagerSP.getCoreSessions"}

docker-compose.yml

version: '3.4'

services:
  gateway:
    image: envoyproxy/envoy:v1.18.3
    volumes:
      - ./envoy.yaml:/opt/envoy.yaml
    expose: 
      - 80
    ports:
      - 80:80
    dns:
      - 172.17.0.1
      - 8.8.8.8
    entrypoint:
      - sh
      - -c
      - /usr/local/bin/envoy -c /opt/envoy.yaml --log-format '[proxy] %L%m%d %T.%e %t envoy] [%t][%n]%v' --component-log-level http:trace,router:trace,filter:trace,connection:trace,conn_handler:trace

envoy.yaml

static_resources:
  listeners:
  - name: main
    address:
      socket_address:
        address: 0.0.0.0
        port_value: 80
    filter_chains:
    - filters:
      - name: envoy.filters.network.http_connection_manager
        typed_config:
          "@type": type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager
          stat_prefix: ingress_http
          codec_type: AUTO
          route_config:
            name: local_route
            virtual_hosts:
            - name: local_service
              domains:
              - "*"
              routes:
              - match:
                  prefix: "/mge"
                  query_parameters: 
                    - name: serviceName
                      string_match: 
                        contains: SessionManagerSP.getCoreSessions
                route:
                  cluster: get_core_sessions
                  prefix_rewrite: /get
          http_filters:
          - name: envoy.filters.http.router
            typed_config: {}

  clusters:
  - name: get_core_sessions
    connect_timeout: 0.25s
    type: STRICT_DNS # static
    lb_policy: ROUND_ROBIN
    load_assignment:
      cluster_name: get_core_sessions
      endpoints:
      - lb_endpoints:
        - endpoint:
            address:
              socket_address:
                address: postman-echo.com
                port_value: 80