How to debug reqwest::Error sourced from source: hyper::Error(Parse(Header(Token)))

[eyalsatori]

Hi ,
I have a system in production that run reqwest - and from time to time it's get the following error:

reqwest::Error { kind: Request, url: Url { scheme: "https", cannot_be_a_base: false, username: "", password: None, host: Some(Domain("my.app.com")), port: None, path: "/some/path", query: Some("key=605fac13-eef5-4d9f-b825-17b39598dd10\"), fragment: None }, source: hyper::Error(Parse(Header(Token))) }"

Because the kind kind: Request I am assuming the request didn't leave the client machine. But on the other hand when I create request from my local with the exactly same parameters (query , headers , body ,url) it's work well .

In addition I tried to print the RequestBuilder before the send and look like it's had no errors during the request-building phase.

I am looking for some ideas how to continue debug it ..
thanks ahead :)

[seanmonstar]

It's an error from the server. It sent a header with an "illegal" character. If the error type were Builder, that would mean it was local while constructing the request.

[eyalsatori]

thanks a lot !! :)

Is there any way to print to raw bytes of the server response in case of error ?

[seanmonstar]

You can enable the ClientBuilder::connection_verbose option and then turn on logging.