panic on extremely long urls

[jcfj]

The following code

//! ```cargo
//! [dependencies]
//! itertools = "0.11.0"
//! reqwest = "0.11.18"
//! serde_json = "1.0.104"
//! reqwest = { version = "0.11.18", features = ["json"] }
//! tokio = { version = "1.29.1", features = ["full"] }
//! ```

use itertools::Itertools;

#[tokio::main]
async fn main() {
    let url = reqwest::Url::parse(&format!(
        "http://router.project-osrm.org/table/v1/driving/{}?sources=0",
        (0..5000).map(|i| format!("13.{i:04},52.4242")).join(";")
    ))
    .unwrap();
    dbg!(url.as_str());
    dbg!(reqwest::get(url)
        .await
        .unwrap()
        .json::<serde_json::Value>()
        .await
        .unwrap());
}

will trigger

thread 'main' panicked at 'a parsed Url should always be a valid Uri: InvalidUri(TooLong)', /home/julius/.cargo/registry/src/index.crates.io-6f17d22bba15001f/reqwest-0.11.18/src/into_url.rs:80:14
stack backtrace:
   0: rust_begin_unwind
             at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/std/src/panicking.rs:593:5
   1: core::panicking::panic_fmt
             at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/core/src/panicking.rs:67:14
   2: core::result::unwrap_failed
             at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/core/src/result.rs:1651:5
   3: core::result::Result<T,E>::expect
             at /rustc/8ede3aae28fe6e4d52b38157d7bfe0d3bceef225/library/core/src/result.rs:1033:23
   4: reqwest::into_url::expect_uri
             at /home/julius/.cargo/registry/src/index.crates.io-6f17d22bba15001f/reqwest-0.11.18/src/into_url.rs:78:9
   5: reqwest::async_impl::client::Client::execute_request
             at /home/julius/.cargo/registry/src/index.crates.io-6f17d22bba15001f/reqwest-0.11.18/src/async_impl/client.rs:1679:19
   6: reqwest::async_impl::request::RequestBuilder::send
             at /home/julius/.cargo/registry/src/index.crates.io-6f17d22bba15001f/reqwest-0.11.18/src/async_impl/request.rs:509:24
   7: reqwest::get::{{closure}}
             at /home/julius/.cargo/registry/src/index.crates.io-6f17d22bba15001f/reqwest-0.11.18/src/lib.rs:287:5
   8: repro::main::{{closure}}
             at ./src/main.rs:26:10

I'm not sure how this would be best resolved. There currently is a hard-coded maximum length in http and several similar issues have already been reported, ending in a PR that would bubble up that error instead of panicking. But personally, I'd very much like it if I could send this HTTP request. router.project-osrm.org may not respond to it, but if running the underlying osrm software locally, it is both possible and meaningful to make these (somewhat insanely) large requests.