CODEWITHSUNDEEP
gopipe
ginad
ginad

Reputation: 1973

Golang io.Pipe vs node.js Pipe

I'm new to golang and I'm having problem understanding go's io.Pipe. Is this similar to node.js' .pipe? And how should I use it? Is it possible to use it with 1 read file and a write file?

Thank in advance guys.

Upvotes: 1

Views: 1428

Answers (1)

Uvelichitel
Uvelichitel

Reputation: 8490

No, they are not precisely similar. io.Copy(dat io.Writer, src io.Reader) is quite enough to read and write files, like this:

input := bufio.NewReader(os.Stdin)
output := bufio.NewWriter(os.Stdout) // buffer output like C stdlib
io.Copy(output, input)               // copy entire file
output.Flush()

io.Pipe() (*PipeReader, *PipeWriter) will produce piped Reader and Writer for you when you have not them but code expect them, like this:

type id struct{
  name string
  age int
}

payload := id{"John", 25}     
requestBody, jsonPayload := io.Pipe()
request := http.NewRequest("POST". "http://www.example.com", requestBody) // NewRequest expect io.Reader
encoder := json.NewEncoder(jsonPayload) // NewEncoder expect io.Writer
err := encoder.Encode(payload)
response, err := client.Do(request)

Upvotes: 5

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