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Add tooling for recording and replaying PyPI interactions #609

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@zanieb zanieb commented Dec 11, 2023

Uses mitmproxy to record and replay interactions with a PyPI server. For example:

./offlinepi record cargo test --features pypi -- --test-threads=1

Then run tests with replayed responses:

./offlinepi replay cargo test --features pypi

I tested this with my internet turned off, so it looks to be fully offline.

See the README for more details.

I want to figure out a good way to help people install the certificate as it's not trivial. I did:

sudo security add-trusted-cert -d -p ssl -p basic -k /Library/Keychains/System.keychain ~/.mitmproxy/mitmproxy-ca-cert.pem

See #615 for a more general solution.

I'm also not sure what the best way is to hook this into our test suite in practice. It'd be nice to have a command that recorded new responses automatically or just replayed if not needed, but it's unclear how that'd be done :) it seems best for others to play with this before we make it integral in any way.

@zanieb zanieb force-pushed the zb/offlinepi branch 2 times, most recently from c3520ff to 9838342 Compare December 11, 2023 21:24
reqwest = { version = "0.11.22", default-features = false, features = ["json", "gzip", "brotli", "stream", "rustls-tls"] }
reqwest = { version = "0.11.22", default-features = false, features = ["json", "gzip", "brotli", "stream", "rustls-tls-native-roots"] }
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I believe this is required because I registered the cert with my system.

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rustls-tls: Enables TLS functionality provided by rustls. Equivalent to rustls-tls-webpki-roots.
rustls-tls-webpki-roots: Enables TLS functionality provided by rustls, while using root certificates from the webpki-roots crate.
rustls-tls-native-roots: Enables TLS functionality provided by rustls, while using root certificates from the rustls-native-certs crate.
source

Hm...

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@zanieb zanieb Dec 11, 2023

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zanieb commented Dec 12, 2023

Oh also I needed to install from GitHub to get things working initially, I should verify and document what version we require.

konstin added a commit that referenced this pull request Dec 12, 2023
Built on #609

When activating the `puffin-test-custom-ca-cert` feature, you can inject a custom ssl certificate by setting `PUFFIN_TEST_CA_CERT_PEM` to a pem file, e.g.

```bash
PUFFIN_TEST_CA_CERT_PEM=$(pwd)/mitmproxy-ca-cert.pem ./offlinepi record cargo test --features pypi --features puffin-test-custom-ca-cert -- --test-threads=1
```

This feature is off by default, so this is not possible in release builds.
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zanieb commented Dec 12, 2023

A HAR file for our test suite is about 10 MB e.g. https://gist.github.com/zanieb/fb1d4f03176be020a2d0912476d19a1c

Built on #609

When activating the `puffin-test-custom-ca-cert` feature, you can inject
a custom ssl certificate by setting `PUFFIN_TEST_CA_CERT_PEM` to a pem
file, e.g.

```bash
PUFFIN_TEST_CA_CERT_PEM=$(pwd)/mitmproxy-ca-cert.pem ./offlinepi record cargo test --features pypi --features puffin-test-custom-ca-cert -- --test-threads=1 
```

This feature is off by default, so this is not possible in release
builds.
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zanieb commented Dec 14, 2023

I'll revert my cert changes in favor of #615 if possible and document usage.

@zanieb zanieb closed this Jan 18, 2024
BurntSushi pushed a commit that referenced this pull request Feb 16, 2024
Closes #1474 

Using the `rustls-tls-native-roots` feature

> `rustls-tls`: Enables TLS functionality provided by rustls. Equivalent
to rustls-tls-webpki-roots.
>
> `rustls-tls-webpki-roots`: Enables TLS functionality provided by
rustls, while using root certificates from the webpki-roots crate.
>
> `rustls-tls-native-roots`: Enables TLS functionality provided by
rustls, while using root certificates from the rustls-native-certs
crate.

Additional context:

- seanmonstar/reqwest#1554
- encode/httpx#302
- [Should I use the native certs or
webpki-roots?](https://github.com/rustls/rustls-native-certs#should-i-use-this-or-webpki-roots)

Prior discussion at #609
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