/// Read headers from the given line stream.
Read headers from the given line stream.
Read headers from the given line stream .
pub async fn read<S>(buf: &mut Vec<u8>, reader: &mut S) -> anyhow::Result<Option<Self>>
    where
        S: Unpin + AsyncBufRead,
    {
        let mut headers = Headers::default();
        loop {
            buf.clear();
            let len = match reader.read_until(b'\n', buf).await {
                Ok(len) => len,
                Err(error) => return Err(error.into()),
            };
            if len == 0 {
                return Ok(None);
            }
            debug_assert!(len == buf.len());
            let buf = &buf[..len];
            let buf = std::str::from_utf8(buf)?;
            let line = buf.trim();
            if line.is_empty() {
                break;
            }
            let mut parts = line.splitn(2, ':').map(str::trim);
            let (key, value) = match (parts.next(), parts.next()) {
                (Some(key), Some(value)) => (key, value),
                out => {
                    return Err(anyhow!("bad header: {:?}", out));
                }
            };
            let key = key.to_lowercase();
            match key.as_str() {
                "content-type" => match value {
                    "application/vscode-jsonrpc; charset=utf-8" => {
                        headers.content_type = Some(ContentType::JsonRPC);
                    }
                    value => {
                        return Err(anyhow!("bad value: {:?}", value));
                    }
                },
                "content-length" => {
                    let value = value
                        .parse::<u32>()
                        .map_err(|e| anyhow!("bad content-length: {}: {}", value, e))?;
                    headers.content_length = Some(value);
                }
                key => {
                    return Err(anyhow!("unsupported header: {:?}", key));
                }
            }
        }
        Ok(Some(headers))
    }
pub async fn read < S > ( buf : & mut Vec < u8 > , reader : & mut S ) -> anyhow :: Result < Option < Self > > where S : Unpin + AsyncBufRead , { let mut headers = Headers :: default ( ) ; loop { buf . clear ( ) ; let len = match reader . read_until ( b'\n' , buf ) . await { Ok ( len ) => len , Err ( error ) => return Err ( error . into ( ) ) , } ; if len == 0 { return Ok ( None ) ; } debug_assert ! ( len buf len ( ) ) ; let buf = & buf [ .. len ] ; let buf = std :: str :: from_utf8 ( buf ) ? ; let line = buf . trim ( ) ; if line . is_empty ( ) { break ; } let mut parts = line . splitn ( 2 , ':' ) . map ( str :: trim ) ; let ( key , value ) = match ( parts . next ( ) , parts . next ( ) ) { ( Some ( key ) , Some ( value ) ) => ( key , value ) , out => { return Err ( anyhow ! ( " " out ) ) ; } } ; let key = key . to_lowercase ( ) ; match key . as_str ( ) { " " => match value { " " => { headers . content_type = Some ( ContentType :: JsonRPC ) ; } value => { return Err ( anyhow ! ( " " value ) ) ; } } , " " => { let value = value . parse :: < u32 > ( ) . map_err ( | e | anyhow ! ( " " value e ) ) ? ; headers . content_length = Some ( value ) ; } key => { return Err ( anyhow ! ( " " key ) ) ; } } } Ok ( Some ( headers ) ) }
Read headers from the given line stream.
Read headers from the given line stream .
buf
&mut Vec<u8>
reader
&mut S