feat(httpclientx): allow configuring max-response-body size #1588
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This diff includes a first attempt at consolidating the patterns with which we invoke OONI and third-party API calls. I have refactored the code of httpx and httpapi into a new package called httpclientx, added some tests, started converting some parts of the tree, and explained myself in a design document. Part of ooni/probe#2700
Spotted thanks to a very paranoid check inside ./internal/oonirun. Was not a problem before for `httpx` because of its usage pattern and may or may not be a problem for the `httpapi` package (did not check since this work is focused on replacing both `httpx` and `httpapi`).
Previously, we were gracefully handling this case, but honestly it is not the best approach to pretend there's an empty structure if the server breaks the API and returns `"null"` rather than an object. That said, it was still awesome to have this test in place because it helped us to figure out this extra condition of which httpclientx should be aware and that this problem needs to be dealt with systematically inside the httpclientx package.
Conflicts: internal/enginelocate/cloudflare.go internal/enginelocate/ubuntu.go
Conflicts: internal/oonirun/v2_test.go
As before, here I am going to ensure there's redundancy.
Conflicts: internal/httpclientx/overlapped.go
Conflicts: internal/httpapi/sequence.go
bassosimone
changed the title
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While removing
httpapiin #1560, I noticed that I actually liked limiting the max body size, which is particularly useful in case of gzip bombs. So, add tests for gzip bombs and allow configuring the maximum body size. We detect truncation by reading one more byte than needed and then checking the body length.Part of ooni/probe#2729.