Too Vague: Reqwest Error error sending request for url (some url)

[evbo]

Hi,

Why would reqwest generate such a vague error as this? Is there any way to encourage the library to share more details without verbose logging?

error sending request for url (https://example.com)

What could have possibly gone wrong? Should I just add a retry for any reqwest::error that is thrown? This is an extremely rare error, it happened for the first time in months.

Also, I am using thiserror as follows. Any recommendations for capturing error messages better?:

#[error(transparent)]
ReqwestError(#[from] reqwest::Error),

I see there's all these is_ functions on the Error type. Anyway to include them all in one big debug string?

[seanmonstar]

Often the reason for the error can be found in the source() chain. It's not printed by default, since that is what Rust guidelines recommend, and instead you're encouraged to use something like std::error::Report (when stabilized), or anyhow or eyre.

[evbo]

sorry, can you show a basic example how I can print full error information?

I am using thiserror (it's too good not to use it and there's no going back at this point, sorry) and could easily add a From impl to pull the source out. Just not sure how exactly you recommend.

[seanmonstar]

thiserror is fine. A basic reporter could do something like this (might have a syntax error):

fn report(mut err: &dyn (std::error::Error + 'static)) -> String {
    let mut s = format!("{}", err);
    while let Some(src) = err.source() {
        let _ = write!(s, "\n\nCaused by: {}", src);
        err = src;
    }
    s
}