go/src/net/http/httputil/httputil.go

// NewChunkedReader returns a new chunkedReader that translates the data read from r
// out of HTTP "chunked" format before returning it.
// The chunkedReader returns [io.EOF] when the final 0-length chunk is read.
//
// NewChunkedReader is not needed by normal applications. The http package
// automatically decodes chunking when reading response bodies.
func NewChunkedReader(r io.Reader) io.Reader { … }

// NewChunkedWriter returns a new chunkedWriter that translates writes into HTTP
// "chunked" format before writing them to w. Closing the returned chunkedWriter
// sends the final 0-length chunk that marks the end of the stream but does
// not send the final CRLF that appears after trailers; trailers and the last
// CRLF must be written separately.
//
// NewChunkedWriter is not needed by normal applications. The http
// package adds chunking automatically if handlers don't set a
// Content-Length header. Using NewChunkedWriter inside a handler
// would result in double chunking or chunking with a Content-Length
// length, both of which are wrong.
func NewChunkedWriter(w io.Writer) io.WriteCloser { … }

var ErrLineTooLong …