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
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
Tutorials
+5.2k Golang : Issue HTTP commands to server and port example
+26k Golang : Convert IP address string to long ( unsigned 32-bit integer )
+27.6k PHP : Convert(cast) string to bigInt
+16.4k CodeIgniter/PHP : Create directory if does not exist example
+10.6k Android Studio : Simple input textbox and intercept key example
+24.5k Golang : GORM read from database example
+22.9k Golang : Gorilla mux routing example
+4.8k Facebook : How to place save to Facebook button on your website
+5k Golang : Calculate a pip value and distance to target profit example
+17k Golang : How to save log messages to file?
+4.6k Mac OSX : Get disk partitions' size, type and name
+32k Golang : Convert an image file to []byte