502 Bad Gateway 錯誤表明伺服器以閘道器或代理訪問時，收到了來自上游服務器的無效回應。
注意：閘道器可能位於網路上的不同地方。502 錯誤通常也不是開發者可以修復的，他通常需要在要訪問的的伺服器或代理修復之。
狀態
502 Bad Gateway
規範
| 規範 | 標題 |
|---|---|
| RFC 7231, section 6.6.3: 502 Bad Gateway | Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content |
瀏覽器相容性
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