HTTP
408 Request Timeout
The server timed out waiting for the request. The client did not produce a request within the time the server was prepared to wait.
このコードが表示された場合
When a client takes too long to send the complete request (slow upload, network issues).
修正方法
Retry the request. Check your network connection. Reduce request payload size.
仕様
RFC / 仕様書を見る →クロスプロトコル対応コード
比較
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