Golang : Output or print out JSON stream/encoded data

Problem :

You need to produce JSON stream or JSON encoded data to web browser or client. How to do that?

Solution :

Set the header Content-Type to application/json and write the http.ResponseWriter.

For example :

 package main

 import (

 func Employees(w http.ResponseWriter, r *http.Request) {
  w.Header().Set("Content-Type", "application/json")

 // NOTE : put jsonStr in a FOR loop to read forever from database and encode the data with
 // json.Marshal() function to produce JSON stream
 // see https://www.socketloop.com/tutorials/golang-convert-csv-data-to-json-format-and-save-to-file

 // for this example, we will use static JSON string

  jsonStr := `[{"Name":"Dennis","Age":16,"Job":"CEO"},

 // output to web or client

 func main() {

  mux := http.NewServeMux()
  mux.HandleFunc("/", Employees)

  http.ListenAndServe(":8080", mux)

Reference :


  See also : Golang : Unmarshal JSON from http response

By Adam Ng

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