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 (
"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
See also : Golang : Unmarshal JSON from http response
By Adam Ng
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