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issue-1538-troubled-proxy-parsing #1539

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Coding-Badly
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@Coding-Badly Coding-Badly commented May 4, 2022

Background

We have a desire for URL mistakes to result in errors when calling Proxy::http.

Change

Check for scheme during URL parse error handling. Lots of unit tests.

Fixes #1538.

@seanmonstar
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Sounds like a great idea to me, thanks!

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Running cargo fmt locally doesn't seem to work over the embedded tests ... Oh, wait. I found it...

cargo fmt -- --check $(find . -name '*.rs' -print)

src/proxy.rs Outdated
}
} else {
let text = format!("{}", err);
if text == "URL scheme is not allowed" {
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Matching on the Display output of an error makes me nervous. In pretty much all error types, the output is not considered stable. Is there no other way to check? Is this check important?

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Yeah. That's not my proudest moment.

The check is important. The domain:port case ends up here. The string comparison was the easiest way to check for that error. I think a better option would be to carry a typed thing instead of a string. There's some risk but the reward is a better solution. I'll poke at it for a bit.

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Oh, if that error is owned by the reqwest crate, we can just make it a private unit struct, instead of a string, and then check via downcasting.

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Yup. Just pushed the update. Windows looks good. Checking Linux. Running cargo fmt. All good!

…dScheme instead of the error text to determine that a scheme is not present.
@seanmonstar seanmonstar merged commit 2a6e012 into seanmonstar:master May 5, 2022
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:woohoo:

Thanks!

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Troubled Proxy Parsing?
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