Resolving the TLS url issue

[limbooverlambda]

While running the client we are running into issues where the client fails to connect to a TLS enabled PD endpoint with the error:

[WARN] [config_logging.go:287] ["rejected connection"] [remote-addr="[addr]:port"] [server-name=] [error="tls: first record does not look like a TLS handshake"]

Digging into the code, the problem seems to stem from the following logic in the client (

client-rust/src/common/security.rs

Line 80 in c6110dd

 let addr = "http://".to_string() + &SCHEME_REG.replace(addr, ""); 
)
let addr = "http://".to_string() + &SCHEME_REG.replace(addr, "");

info!("connect to rpc server at endpoint: {:?}", addr);

let mut builder = Channel::from_shared(addr)?
    .tcp_keepalive(Some(Duration::from_secs(10)))
    .keep_alive_timeout(Duration::from_secs(3));

Here SCHEME_REG is the regex to find "https" in the prefix of the address (

client-rust/src/common/security.rs

Line 19 in c6110dd

 lazy_static::lazy_static! { 
).
lazy_static::lazy_static! {
    static ref SCHEME_REG: Regex = Regex::new(r"^\s*(https?://)").unwrap();
}

This is a problem during the ssl handshake since the server is not acknowledging the requests sent to an addressed prefixed with "http" instead of "https". Adding the logic to handle these variations.

[pingyu]

@limbooverlambda

Thanks for your contribution !

Please fix the error of "make check" in CI.

Rest LGTM~

[limbooverlambda]

@limbooverlambda

Thanks for your contribution !

Please fix the error of "make check" in CI.

Rest LGTM~

Thanks @pingyu . I fixed the issues with the formatting.

[pingyu]

LGTM~