wasm_mock_server

Wasm Mock Server

MITM server for software testing that supports both user defined wasm functions and WS connection. https://hub.docker.com/repository/docker/rustropy/wasm_mock_server/

Getting Started

Head to https://github.com/wasmmock/wasm_mock_server/releases and download the relevant zip. Unzip the binary and run the binary.

• API default port: 20825
• API HTTP MITM default port: 20810
• User defined port for TCP MITM: 3335 (for example)

For starter

• Download v2.wasm from this repo. The source code for this wasm can be found here

curl -X POST http://localhost:20825/call/v2/unified \
    --header "Content-Type:application/octet-stream" \
	--data-binary "@v2.wasm"

• You should see "added_fn /t.json_http_modify_req,/t.json_http_modify_res"

HTTPs Proxy

• SSL Cert can be found in GET /cert/pem

wget http://localhost:20825/cert/pem

• On Macos, click on the crt file to install the SSL certificate.

Firefox testing

• go to the firefox's certificate manager and import the CRT certificate and trust it.
• In search bar insdie firefox's setting, type "proxy"
• Check Manual proxy config box
  • Type your wifi ip address inside HTTP PROXY text box
  • Check the box "Also to use this proxy for HTTPS"
  • Type "20810" in Port
  • Click "Ok"
• In the firefox browser, go to www.yahoo.com/t.json. You should see

{"data":"hi"}

Mobile testing (Android)

Copy c8750f0d.0 from cert_folder from the zip files into /system/etc/security/cacerts folder in Android phone.

In order to do this, rooting the phone is required. Please check this stackoverflow for detail: https://stackoverflow.com/questions/44942851/install-user-certificate-via-adb

Video Resources

Roadmap

To build web UI

• cd ui
• NODE_OPTIONS=--openssl-legacy-provider yarn build
• cd ..
• make generate (this stores the generated common web assets in internal/box/blob.go as golang file)
• After starting the wasm mock server, go to http://localhost:20825/index.html

To run

• cd runner && go run main.go