我正在使用數據同步 API 開始執行任務，沒有任何問題。我正在努力處理返回的錯誤結構，我想訪問單個元素，但我似乎無法這樣做。例如在以下錯誤中我希望能夠訪問Message_的內容2022/03/19 09:33:48 Sync called : InvalidRequestException: Unable to queue the task execution for task task-xxxxxxxxxxxx. The task already has another task execution exec-030b4a31dc2e33641 currently running or queued with identical Include and Exclude filter patterns. Please provide unique Include and Exclude filter patterns for the new task execution and try again.{ RespMetadata: { StatusCode: 400, RequestID: "xxxxxxxxxxxxxxxxxxxxx" }, ErrorCode: "DedupeFailed", Message_: "Unable to queue the task execution for task task-xxxxxxxxxx. The task already has another task execution exec-xxxxxxxxxx currently running or queued with identical Include and Exclude filter patterns. Please provide unique Include and Exclude filter patterns for the new task execution and try again."}這是我的工作示例： // Create datasync service client svc := datasync.New(sess) params := &datasync.StartTaskExecutionInput{ TaskArn : aws.String("arn:aws:datasync:*******************************"), } // start task execution resp, err := svc.StartTaskExecution(params) //err = req.Send() if err == nil { // resp is now filled fmt.Println(resp) // this outputs this { TaskExecutionArn: "arn:aws:datasync:xxxxxxxx:task/task-03ecb7728e984e36a/execution/exec-xxxxxxxxxx" } } else { fmt.Println(err) //fmt.Println(err.Message()) THIS DOES NOT WORK //fmt.Println(err.Message_) THIS ALSO DOES NOT WORK }如果我這樣做fmt.Println(err.Message())或者this fmt.Println(err.Message_)我得到這個error err.Message undefined (type error has no field or method Message) err.Message_ undefined (type error has no field or method Message_)我哪里做錯了 ？
1 回答
瀟湘沐
TA貢獻1816條經驗 獲得超6個贊
AWS SDK for Go 中的錯誤通常是接口錯誤awserr.Error（Github 上的代碼）。
如果你只想收到消息，你可以這樣做：
resp, err := svc.StartTaskExecution(params)
if err != nil {
if awsErr, ok := err.(awserr.Error); ok {
fmt.Println(awsErr.Message())
} else {
fmt.Println(err.Error())
}
}
首先，檢查是否確實存在錯誤：
if err != nil {...}
然后，我們嘗試將錯誤轉換為特定的“類型” awserr.Error：
err.(awserr.Error)
cast 的返回值是特定的錯誤awsErr和一個bool指示 cast 是否有效的值 ( ok)。
awsErr, ok := err.(awserr.Error)
其余代碼基本上只是檢查，如果ok == true是這種情況，您可以訪問錯誤字段，例如Message：
if awsErr, ok := err.(awserr.Error); ok {
fmt.Println(awsErr.Message())
}
否則，您只需打印標準的 Go 錯誤消息：
if awsErr, ok := err.(awserr.Error); ok {
...
} else {
fmt.Println(err.Error())
}
- 1 回答
- 0 關注
- 164 瀏覽
添加回答
舉報
0/150
提交
取消