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I'm the author of HTTP Toolkit, I actually built the internals much earlier as an open-source library (Mockttp: https://github.com/httptoolkit/mockttp https://g

I'm the author of HTTP Toolkit, I actually built the internals much earlier as an open-source library (Mockttp: https://github.com/httptoolkit/mockttp https://github.com/httptoolkit/mockttp) designed for exactly the end-to-end testing mocking use case you're talking about. It's MIT-licensed, and you can build an automated HTTP/HTTPS rewriting proxy using that in a handful of lines of JS, and script any kind of transformations or inject any responses you like. There's a general guide to getting started here: https://httptoolkit.tech/blog/javascript-mitm-proxy-mockttp/ https://httptoolkit.tech/blog/javascript-mitm-proxy-mockttp/. For the more general interactive testing/debugging case, you can also use HTTP Toolkit itself (it has a rules builder for this kind of thing) but if you're building automation you should just use the internals directly, they have exactly the same capabilities. HTTP Toolkit just provides a UI and convenient interception setup tools over the top.

intpx 5y ago
Is there an internet law for when you spend weeks looking for a framework or library to solve a problem and it only reveals itself after your organization makes a really bad choice to do something else? I have been looking for exactly this kind of local proxy to dynamically hack headers and dynamically spoof responses for an internal app. This would have been the perfect starting place...
- kingcharles 5y ago
  Oh lord, this should be a Law. You only find the exact framework or app you've been looking for exactly one day after you've finished implementing your own solution from whole cloth.
inglor 5y ago
This is great! I've been looking for this sort of thing today. It's very helpful and also nice to see some projects I maintain or contribute to in the dependencies list :) You might want to consider migrating from node-abort-controller to native AbortController by the way.

intpx 5y ago

Is there an internet law for when you spend weeks looking for a framework or library to solve a problem and it only reveals itself after your organization makes a really bad choice to do something else? I have been looking for exactly this kind of local proxy to dynamically hack headers and dynamically spoof responses for an internal app. This would have been the perfect starting place...

kingcharles 5y ago
Oh lord, this should be a Law. You only find the exact framework or app you've been looking for exactly one day after you've finished implementing your own solution from whole cloth.

inglor 5y ago

This is great! I've been looking for this sort of thing today. It's very helpful and also nice to see some projects I maintain or contribute to in the dependencies list :) You might want to consider migrating from node-abort-controller to native AbortController by the way.