Golang : Output or print out JSON stream/encoded data



Tags : golang json-stream write-to-responsewriter content-type

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 (
  "net/http"
 )

 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"},
 {"Name":"Eva","Age":34,"Job":"CFO"},
 {"Name":"Paul","Age":28,"Job":"COO"}]`


 // output to web or client
  w.Write([]byte(jsonStr))
 }

 func main() {

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

  http.ListenAndServe(":8080", mux)
 }

Reference :

https://www.socketloop.com/tutorials/golang-unmarshal-json-from-http-response

Affiliate :

Hire Golang Developers


  See also : Golang : Unmarshal JSON from http response



Tags : golang json-stream write-to-responsewriter content-type

By Adam Ng

IF you gain some knowledge or the information here solved your programming problem. Please consider donating to the less fortunate or some charities that you like. Apart from donation, planting trees, volunteering or reducing your carbon footprint will be great too.


Advertisement