io-pipe-examples.go

// Stolen from https://zupzup.org/io-pipe-go/

pr, pw := io.Pipe()

go func() {
    // close the writer, so the reader knows there's no more data
    defer pw.Close()

    // write json data to the PipeReader through the PipeWriter
    if err := json.NewEncoder(pw).Encode(&PayLoad{Content: "Hello Pipe!"}); err != nil {
        log.Fatal(err)
    }
}()

// JSON from the PipeWriter lands in the PipeReader
// ...and we send it off...
if _, err := http.Post("http://example.com", "application/json", pr); err != nil {
    log.Fatal(err)
}