Go HTTP Client GET with URL parameters and a JSON response
Example
A request for the top 10 most recently active StackOverflow posts using the Stack Exchange API.
package main
import (
"encoding/json"
"fmt"
"net/http"
"net/url"
)
const apiURL = "https://api.stackexchange.com/2.2/posts?"
// Structs for JSON decoding
type postItem struct {
Score int `json:"score"`
Link string `json:"link"`
}
type postsType struct {
Items []postItem `json:"items"`
}
func main() {
// Set URL parameters on declaration
values := url.Values{
"order": []string{"desc"},
"sort": []string{"activity"},
"site": []string{"stackoverflow"},
}
// URL parameters can also be programmatically set
values.Set("page", "1")
values.Set("pagesize", "10")
resp, err := http.Get(apiURL + values.Encode())
if err != nil {
panic(err)
}
defer resp.Body.Close()
// To compare status codes, you should always use the status constants
// provided by the http package.
if resp.StatusCode != http.StatusOK {
panic("Request was not OK: " + resp.Status)
}
// Example of JSON decoding on a reader.
dec := json.NewDecoder(resp.Body)
var p postsType
err = dec.Decode(&p)
if err != nil {
panic(err)
}
fmt.Println("Top 10 most recently active StackOverflow posts:")
fmt.Println("Score", "Link")
for _, post := range p.Items {
fmt.Println(post.Score, post.Link)
}
}
