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我正在學習golang和谷歌應用程序引擎數據存儲。無法存儲在數據存儲gcloud
我打算做一個簡單的休息API調用來保存和檢索數據存儲中的數據。
我遵循了幾個你好世界教程和官方入門指南。最後我想到的是這個。
`
package hello
import (
"fmt"
"log"
"net/http"
"encoding/json"
"cloud.google.com/go/datastore"
"golang.org/x/net/context"
"github.com/gorilla/mux"
"time"
)
type Task struct {
Description string `datastore:"description"`
Created time.Time `datastore:"created"`
id int64
}
func saveData(w http.ResponseWriter, r *http.Request){
fmt.Println("Endpoint Hit: saveData")
input := r.URL.Query().Get("input")
fmt.Println(input)
ctx := context.Background()
projectID := "api-project-426361742627"
client, err := datastore.NewClient(ctx, projectID)
if err != nil {
log.Fatalf("Failed to create client: %v", err)
}
kind := "Task"
task := Task{
Description: input,
Created: time.Now(),
}
taskKey := datastore.IncompleteKey(kind, nil)
if _, err := client.Put(ctx, taskKey, &task); err != nil {
log.Fatalf("Failed to save task: %v", err)
}
fmt.Printf("Saved %v: %v\n", taskKey, task.Description)
json.NewEncoder(w).Encode(task)
}
func returnAll(w http.ResponseWriter, r *http.Request){
fmt.Println("Endpoint Hit: returnAll")
ctx := context.Background()
projectID := "api-project-426361742627"
client, err := datastore.NewClient(ctx, projectID)
if err != nil {
log.Fatalf("Failed to create client: %v", err)
}
query := datastore.NewQuery("Task").Order("description")
var tasks []*Task
keys, err := client.GetAll(ctx, query, &tasks)
for i, key := range keys {
tasks[i].id = key.ID
}
// for _, t := range tasks {
// // fmt.Println(t.id, t.Description)
// }
json.NewEncoder(w).Encode(tasks)
}
func homePage(w http.ResponseWriter, r *http.Request){
fmt.Fprintf(w, "Welcome to the HomePage!")
fmt.Println("Endpoint Hit: homePage")
}
func handleRequests() {
myRouter := mux.NewRouter()
myRouter.HandleFunc("/", homePage)
myRouter.HandleFunc("/save", saveData)
myRouter.HandleFunc("/retrieve", returnAll)
http.Handle("/", myRouter)
}
func init() {
handleRequests()
}
`
現在我面臨的問題是在這條線
client, err := datastore.NewClient(ctx, projectID)
我收到以下錯誤。
2017/09/26 07:15:16 http: panic serving 127.0.0.1:59488: not an App Engine context
goroutine 17 [running]:
net/http.(*conn).serve.func1(0xc82021e000)
/home/aditya/google-cloud-sdk/platform/google_appengine/goroot-1.6/src/net/http/server.go:1389 +0xc1
panic(0xa44740, 0xc82018a8c0)
/home/aditya/google-cloud-sdk/platform/google_appengine/goroot-1.6/src/runtime/panic.go:443 +0x4e9
google.golang.org/appengine/internal.fullyQualifiedAppID(0x7f4142e12be0, 0xc82000b4e0, 0x0, 0x0)
/home/aditya/work/src/google.golang.org/appengine/internal/identity_classic.go:54 +0x8b
google.golang.org/appengine/internal.FullyQualifiedAppID(0x7f4142e12be0, 0xc82000b4e0, 0x0, 0x0)
/home/aditya/work/src/google.golang.org/appengine/internal/api_common.go:77 +0xe2
google.golang.org/appengine/internal.AppID(0x7f4142e12be0, 0xc82000b4e0, 0x0, 0x0)
/home/aditya/work/src/google.golang.org/appengine/internal/identity.go:13 +0x37
google.golang.org/appengine.AppID(0x7f4142e12be0, 0xc82000b4e0, 0x0, 0x0)
/home/aditya/work/src/google.golang.org/appengine/identity.go:20 +0x37
golang.org/x/oauth2/google.FindDefaultCredentials(0x7f4142e12be0, 0xc82000b4e0, 0xc820222170, 0x1, 0x1, 0xc820222150, 0x0, 0x0)
/home/aditya/work/src/golang.org/x/oauth2/google/default.go:92 +0x5a8
google.golang.org/api/internal.Creds(0x7f4142e12be0, 0xc82000b4e0, 0xc820248240, 0xc8202452c0, 0x0, 0x0)
/home/aditya/work/src/google.golang.org/api/internal/creds.go:37 +0x173
google.golang.org/api/transport/grpc.Dial(0x7f4142e12be0, 0xc82000b4e0, 0xc820245638, 0x3, 0x3, 0x0, 0x0, 0x0)
/home/aditya/work/src/google.golang.org/api/transport/grpc/dial.go:47 +0x272
cloud.google.com/go/datastore.NewClient(0x7f4142e12be0, 0xc82000b4e0, 0xc0c320, 0x18, 0x0, 0x0, 0x0, 0x9, 0x0, 0x0)
/home/aditya/work/src/cloud.google.com/go/datastore/datastore.go:87 +0x87f
main76346.returnAll(0x7f4142dcb058, 0xc820234000, 0xc82022a000)
hello.go:51 +0x1b8
net/http.HandlerFunc.ServeHTTP(0xcd13d8, 0x7f4142dcb058, 0xc820234000, 0xc82022a000)
/home/aditya/google-cloud-sdk/platform/google_appengine/goroot-1.6/src/net/http/server.go:1618 +0x3a
github.com/gorilla/mux.(*Router).ServeHTTP(0xc820052660, 0x7f4142dcb058, 0xc820234000, 0xc82022a000)
/home/aditya/work/src/github.com/gorilla/mux/mux.go:133 +0x37c
net/http.(*ServeMux).ServeHTTP(0xc82000eab0, 0x7f4142dcb058, 0xc820234000, 0xc82022a000)
/home/aditya/google-cloud-sdk/platform/google_appengine/goroot-1.6/src/net/http/server.go:1910 +0x17d
appengine_internal.handleFilteredHTTP(0x7f4142dcb058, 0xc820234000, 0xc82022a000)
/home/aditya/google-cloud-sdk/platform/google_appengine/goroot-1.6/src/appengine_internal/api_dev.go:102 +0x409
net/http.HandlerFunc.ServeHTTP(0xccfe48, 0x7f4142dcb058, 0xc820234000, 0xc82022a000)
/home/aditya/google-cloud-sdk/platform/google_appengine/goroot-1.6/src/net/http/server.go:1618 +0x3a
net/http.serverHandler.ServeHTTP(0xc820078500, 0x7f4142dcb058, 0xc820234000, 0xc82022a000)
/home/aditya/google-cloud-sdk/platform/google_appengine/goroot-1.6/src/net/http/server.go:2081 +0x19e
net/http.(*conn).serve(0xc82021e000)
/home/aditya/google-cloud-sdk/platform/google_appengine/goroot-1.6/src/net/http/server.go:1472 +0xf2e
created by net/http.(*Server).Serve
/home/aditya/google-cloud-sdk/platform/google_appengine/goroot-1.6/src/net/http/server.go:2137 +0x44e
INFO 2017-09-26 07:15:16,800 module.py:821] default: "GET /retrieve HTTP/1.1" 500 3349
我不知道如何去解決這個問題。我嘗試使用
gcloud auth application-default login
給本地訪問數據存儲，但它不工作。每當我嘗試保存數據或在初始化數據存儲新客戶端時返回所有條目，我都面臨着這個問題。
感謝它的工作。 –