httpmole provides a HTTP mock server that will act as a mole among your services, telling you everything http clients send to it and responding them whatever you want it to respond. Just like an actual mole.

Features:

• Use response-status and response-header to quickly spin up a http server.
• Use response-file to modify the response in real time using a text editor.
• Use response-from to act as a proxy and be able to inspect the request/response going to a given service.
• Cascade several calls using /proxy reserved endpoint.

go install github.com/jcchavezs/httpmole/cmd/httpmole@latest

httpmole -p=8082 -response-status=200

or using a response file:

httpmole -p=8082 -response-file=./myresponse.json

// myresponse.json
{
    "status_code": 200,
    "headers": {
        "content-type": "application/json"
    },
    "body": {
        "message": "I am real"
    }
}

or proxying a service to inspect the incoming requests:

httpmole -p=8082 -response-from=therealservice:8082

or proxying a cascaring call to different services to simulate a distributed transaction:

# terminal 1
httpmole -p=8081 -response-status=201

# terminal 2
httpmole -p=8082 -response-status=202

# terminal 3
httpmole -p=8083 -response-status=203

and running

$ curl -i http://localhost:8081/proxy/localhost:8082/proxy/localhost:8083

HTTP/1.1 203 Non-Authoritative Information
Content-Length: 0
Date: Wed, 17 Jul 2024 08:51:00 GMT
Server-Timing: app;dur=0.00

docker run -p "10080:10080" ghcr.io/jcchavezs/httpmole -response-status=201

or pass a response file over volumes

docker run -p "10080:10080" -v `pwd`/response.json:/httpmole/response.json ghcr.io/jcchavezs/httpmole -response-file=/httpmole/response.json

httpmole is heavily inspired by httplab