/// Reads the content of the next message from given input.
///
/// The input is expected to provide a message as described by "Base Protocol" of Language Server
/// Protocol.
///
/// If this method is called when reader is empty, it returns `UnexpectedEof` error.
Reads the content of the next message from given input.
The input is expected to provide a message as described by "Base Protocol" of Language Server
Protocol.

If this method is called when reader is empty, it returns `UnexpectedEof` error.
Reads the content of the next message from given input . The input is expected to provide a message as described by " Base Protocol " of Language Server Protocol . If this method is called when reader is empty it returns ` UnexpectedEof ` error .
pub fn read_message<R: BufRead>(input: &mut R) -> Result<String, io::Error> {
    // Read in the "Content-Length: xx" part.
    let mut size: Option<usize> = None;
    loop {
        let mut buffer = String::new();
        input.read_line(&mut buffer)?;
        // End of input.
        if buffer.is_empty() {
            return Err(io::Error::new(
                io::ErrorKind::UnexpectedEof,
                "EOF encountered in the middle of reading LSP headers",
            ));
        }
        // Header section is finished, break from the loop.
        if buffer == "\r\n" {
            break;
        }
        let res: Vec<&str> = buffer.split(' ').collect();
        // Make sure header is valid.
        if res.len() != 2 {
            return Err(io::Error::new(
                io::ErrorKind::InvalidData,
                format!("Header '{}' is malformed", buffer),
            ));
        }
        let header_name = res[0].to_lowercase();
        let header_value = res[1].trim();
        match header_name.as_ref() {
            "content-length:" => {
                size = Some(usize::from_str_radix(header_value, 10).map_err(|_e| {
                    io::Error::new(io::ErrorKind::InvalidData, "Couldn't read size")
                })?);
            }
            "content-type:" => {
                if header_value != "utf8" && header_value != "utf-8" {
                    return Err(io::Error::new(
                        io::ErrorKind::InvalidData,
                        format!("Content type '{}' is invalid", header_value),
                    ));
                }
            }
            // Ignore unknown headers (specification doesn't say what to do in this case).
            _ => (),
        }
    }
    let size = match size {
        Some(size) => size,
        None => {
            return Err(io::Error::new(
                io::ErrorKind::InvalidData,
                "Message is missing 'content-length' header",
            ));
        }
    };
    let mut content = vec![0; size];
    input.read_exact(&mut content)?;
    String::from_utf8(content).map_err(|e| io::Error::new(io::ErrorKind::InvalidData, e))
}
pub fn read_message < R : BufRead > ( input : & mut R ) -> Result < String , io :: Error > { // Read in the "Content-Length: xx" part. let mut size : Option < usize > = None ; loop { let mut buffer = String :: new ( ) ; input . read_line ( & mut buffer ) ? ; // End of input. if buffer . is_empty ( ) { return Err ( io :: Error :: new ( io :: ErrorKind :: UnexpectedEof , " " , ) ) ; } // Header section is finished, break from the loop. if buffer == " \r \n " { break ; } let res : Vec < & str > = buffer . split ( ' ' ) . collect ( ) ; // Make sure header is valid. if res . len ( ) != 2 { return Err ( io :: Error :: new ( io :: ErrorKind :: InvalidData , format ! ( " " buffer ) , ) ) ; } let header_name = res [ 0 ] . to_lowercase ( ) ; let header_value = res [ 1 ] . trim ( ) ; match header_name . as_ref ( ) { " " => { size = Some ( usize :: from_str_radix ( header_value , 10 ) . map_err ( | _e | { io :: Error :: new ( io :: ErrorKind :: InvalidData , " " ) } ) ? ) ; } " " => { if header_value != " " && header_value != " " { return Err ( io :: Error :: new ( io :: ErrorKind :: InvalidData , format ! ( " " header_value ) , ) ) ; } } // Ignore unknown headers (specification doesn't say what to do in this case). _ => ( ) , } } let size = match size { Some ( size ) => size , None => { return Err ( io :: Error :: new ( io :: ErrorKind :: InvalidData , " " , ) ) ; } } ; let mut content = vec ! [ 0 size ] ; input . read_exact ( & mut content ) ? ; String :: from_utf8 ( content ) . map_err ( | e | io :: Error :: new ( io :: ErrorKind :: InvalidData , e ) ) }
Reads the content of the next message from given input.
Reads the content of the next message from given input .
input
&mut R