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                # 檢查文檔是否存在 如果確實想檢查一下文檔是否存在,你可以試用`HEAD`來替代`GET`方法,這樣就是會返回HTTP頭文件: ~~~ curl -i -XHEAD /website/blog/123 ~~~ 如果文檔存在,Elasticsearch將會返回`200 OK`的狀態碼: ~~~ HTTP/1.1 200 OKContent-Type: text/plain; charset=UTF-8Content-Length: 0 ~~~ 如果不存在將會返回`404 Not Found`狀態碼: ~~~ curl -i -XHEAD /website/blog/124 ~~~ ~~~ HTTP/1.1 404 Not FoundContent-Type: text/plain; charset=UTF-8Content-Length: 0 ~~~ 當然,這個反饋只代表了你查詢的那一刻文檔不存在,但是不代表幾毫秒后它不存在,很可能與此同時,另一個進程正在創建文檔。
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