[英]Code displaying an URL rather than the reponse of the request GCP with Go
我很難在 Google Cloud Platform 中顯示方向請求的結果。 這是我嘗試過的:
package main
import (
"fmt"
"net/http"
"context"
"io/ioutil"
"google.golang.org/appengine"
"google.golang.org/appengine/urlfetch"
)
const directionAPIKey = "MyAppKey"
const directionURL = "https://maps.googleapis.com/maps/api/directions/json?origin=%s&destination=%s&mode=%s&key=%s"
func main() {
http.HandleFunc("/", handler)
}
func handler(w http.ResponseWriter, r *http.Request) {
ctx := appengine.NewContext(r)
direction, err := fetchDirection(ctx, r.FormValue("origin"), r.FormValue("destination"), r.FormValue("mode"))
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
w.Header().Add("Content-Type", "application/json; charset=utf-8")
w.Write(direction)
}
func fetchDirection(ctx context.Context, origin string, destination string, mode string) ([]byte, error) {
client := urlfetch.Client(ctx)
resp, err := client.Get(fmt.Sprintf(directionURL, origin, destination, mode, directionAPIKey))
if err != nil {
return nil, err
}
defer resp.Body.Close()
return ioutil.ReadAll(resp.Body)
}
我成功部署了我的應用程序,但是,上面代碼的結果是:
Get https://maps.googleapis.com/maps/api/directions/json?origin=&destination=&mode=&key=APIKey not an App Engine context
而不是請求的結果。 這是來自瀏覽器的圖像。 我怎樣才能得到想要的結果,而不僅僅是 URL? 提前致謝。
我發現當您的 AppEngine 應用程序將運行時設置為 go111 並且應用程序導入任何“google.golang.org/appengine”包但應用程序不調用“ appengine.Main”
method func main() {
http.HandleFunc("/", handler)
appengine.Main()
}
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