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HTTP 422 返回码 表示服务器理解请求实体的content type,并且请求实体的语法是正确的，但是服务器不能处理所包含的指示.
重要提示：客户端不应在不修改的情况下重复發送此请求。
422 Unprocessable Entity
| Specification | Title |
|---|---|
| RFC 4918, section 11.2: 422 Unprocessable Entity | HTTP Extensions for Web Distributed Authoring and Versioning (WebDAV) |
AcceptAccept-CharsetAccept-EncodingAccept-LanguageAccept-Patch [我来译!]Accept-RangesAccess-Control-Allow-CredentialsAccess-Control-Allow-HeadersAccess-Control-Allow-MethodsAccess-Control-Allow-OriginAccess-Control-Expose-HeadersAccess-Control-Max-AgeAccess-Control-Request-HeadersAccess-Control-Request-MethodAgeAllowAlt-SvcAuthorizationCache-ControlClear-Site-DataConnectionContent-DispositionContent-EncodingContent-LanguageContent-LengthContent-LocationContent-RangeContent-Security-PolicyContent-Security-Policy-Report-OnlyContent-TypeCookieCookie2Cross-Origin-Resource-PolicyDNTDateETagEarly-DataExpectExpect-CTExpiresFeature-PolicyForwardedFromHostIf-MatchIf-Modified-SinceIf-None-MatchIf-RangeIf-Unmodified-SinceIndex [我来译!]Keep-AliveLarge-AllocationLast-ModifiedLink [我来译!]LocationOriginPragmaProxy-AuthenticateProxy-AuthorizationPublic-Key-PinsPublic-Key-Pins-Report-OnlyRangeRefererReferrer-PolicyRetry-AfterSave-Data [我来译!]Sec-WebSocket-AcceptServerServer-Timing [我来译!]Set-CookieSet-Cookie2SourceMapHTTP Strict Transport SecurityTETiming-Allow-OriginTkTrailerTransfer-EncodingUpgrade-Insecure-Requests用户代理VaryViaWWW-AuthenticateWarningX-Content-Type-OptionsDNS 预读取X-Forwarded-ForX-Forwarded-HostX-Forwarded-ProtoX-Frame-Options 响应头X-XSS-Protection100 Continue101 Switching Protocol103 Early Hints [我来译!]200 OK201 Created202 Accepted203 Non-Authoritative Information204 No Content205 Reset Content206 Partial Content300 Multiple Choices301 Moved Permanently302 Found303 See Other304 Not Modified307 Temporary Redirect308 Permanent Redirect400 Bad Request401 Unauthorized402 Payment Required [我来译!]403 Forbidden404 Not Found405 Method Not Allowed406 Not Acceptable407 Proxy Authentication Required408 Request Timeout409 Conflict410 Gone411 Length Required412 Precondition Failed（先决条件失败）413 Payload Too Large414 URI Too Long415 Unsupported Media Type416 Range Not Satisfiable417 Expectation Failed418 I'm a teapot422 Unprocessable Entity425 Too Early426 Upgrade Required428 Precondition Required429 Too Many Requests431 Request Header Fields Too Large451 Unavailable For Legal Reasons500 内部服务器错误501 Not Implemented502 Bad Gateway503 Service Unavailable504 Gateway Timeout505 HTTP Version Not Supported511 Network Authentication RequiredCSP: base-uriCSP: block-all-mixed-contentCSP: child-src [我来译!]CSP: connect-srcCSP: default-srcCSP: font-srcCSP: form-action [我来译!]CSP: frame-ancestorsCSP: frame-src [我来译!]CSP: img-src [我来译!]CSP: manifest-src [我来译!]CSP: media-src [我来译!]CSP: object-src [我来译!]CSP: plugin-types [我来译!]CSP: referrer [我来译!]CSP: report-uri [我来译!]CSP: require-sri-forCSP: sandboxCSP: script-src [我来译!]CSP: style-src [我来译!]CSP: upgrade-insecure-requestsCSP: worker-src [我来译!]report-to