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Le code de statut de rponse d'erreur client HTTP 422 Unprocessable Content indique que le serveur a compris le type de contenu de la requte et que la syntaxe du contenu tait correcte, mais qu'il n'a pas pu traiter les instructions qu'il contenait.
Les clients qui reoivent une rponse 422 doivent s'attendre ce que rpter la requte sans modification choue avec la mme erreur.
422 Unprocessable Content
L'exemple suivant effectue une requte pour mettre jour le contenu d'un fichier (bas sur l'API GitHub (angl.)).
Le champ content est encod en Base64 et utilise des sauts de ligne \n tous les 60 caractres, avec un saut de ligne final :
PUT /repos/mdn/content/contents/README.md HTTP/1.1
Host: api.example.com
Accept: application/vnd.github+json
Authorization: Bearer abcd123
Content-Type: application/json
Content-Length: 165
{
"message": "My commit",
"content": "WW9zaGkgd2FzIHRoZXJlLCBzbyB3ZXJlIEF5c2UsIGFuZCBCZWxnaW4uIEl0\nIHdhcyBncmVhdCE=\n",
"sha": "80e73970fdee49dbdbac27c1f565d1eb1975d519"
}
Dans cette implmentation, le serveur attend un contenu encod en Base64 strictement conforme la RFC 4648 (en utilisant des mthodes d'encodage strictes (angl.)).
Une rponse 422 Unprocessable Content est retourne et le champ message fournit un contexte sur l'erreur de validation :
HTTP/1.1 422 Unprocessable Content
Date: Fri, 28 Jun 2024 12:00:00 GMT
Content-Type: application/json; charset=utf-8
Content-Length: 187
{
"message": "content is not valid Base64",
"documentation_url": "https://docs.example.com/en/rest/repos/contents"
}
| Spcification |
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| HTTP Semantics # status.422 |
Cette page a t modifie le 8 juil. 2026 par les contributeurices du MDN.
Raison : CORS dsactivRaison : l'en-tte CORS Access-Control-Allow-Origin ne correspond pas xyz Raison : l'en-tte CORS Access-Control-Allow-Origin est manquantReason: CORS header 'Origin' cannot be addedReason: CORS preflight channel did not succeedRaison: la requte CORS a chouReason: CORS request external redirect not allowedRaison : la requte CORS n'utilise pas HTTPReason: Credential is not supported if the CORS header 'Access-Control-Allow-Origin' is '*'Reason: Did not find method in CORS header 'Access-Control-Allow-Methods'Reason: expected 'true' in CORS header 'Access-Control-Allow-Credentials'Reason: invalid token 'xyz' in CORS header 'Access-Control-Allow-Headers'Reason: invalid token 'xyz' in CORS header 'Access-Control-Allow-Methods'Reason: missing token 'xyz' in CORS header 'Access-Control-Allow-Headers' from CORS preflight channelReason: Multiple CORS header 'Access-Control-Allow-Origin' not allowedAcceptAccept-CHAccept-EncodingAccept-LanguageAccept-PatchAccept-PostAccept-RangesAccess-Control-Allow-CredentialsAccess-Control-Allow-HeadersAccess-Control-Allow-MethodsAccess-Control-Allow-OriginAccess-Control-Expose-HeadersAccess-Control-Max-AgeAccess-Control-Request-HeadersAccess-Control-Request-MethodActivate-Storage-AccessAgeAllowAlt-SvcAlt-UsedAttribution-Reporting-EligibleAttribution-Reporting-Register-SourceAttribution-Reporting-Register-TriggerAuthorizationAvailable-DictionaryCache-ControlClear-Site-DataConnectionContent-DigestContent-DispositionContent-DPRContent-EncodingContent-LanguageContent-LengthContent-LocationContent-RangeContent-Security-PolicyContent-Security-Policy-Report-OnlyContent-TypeCookieCritical-CHCross-Origin-Embedder-PolicyCross-Origin-Embedder-Policy-Report-OnlyCross-Origin-Opener-PolicyCross-Origin-Resource-PolicyDateDevice-MemoryDictionary-IDDNTDownlinkDPREarly-DataECTETagExpectExpect-CTExpiresForwardedFromHostIdempotency-KeyIf-MatchIf-Modified-SinceIf-None-MatchIf-RangeIf-Unmodified-SinceIntegrity-PolicyIntegrity-Policy-Report-OnlyKeep-AliveLast-ModifiedLinkLocationMax-ForwardsNELNo-Vary-SearchObserve-Browsing-TopicsOriginOrigin-Agent-ClusterPermissions-PolicyPermissions-Policy-Report-OnlyPragmaPreferPreference-AppliedPriorityProxy-AuthenticateProxy-AuthorizationRangeRefererReferrer-PolicyRefreshReport-ToReporting-EndpointsRepr-DigestRetry-AfterRTTSave-DataSec-Browsing-TopicsSec-CH-Device-MemorySec-CH-DPRSec-CH-Prefers-Color-SchemeSec-CH-Prefers-Reduced-MotionSec-CH-Prefers-Reduced-TransparencySec-CH-UASec-CH-UA-ArchSec-CH-UA-BitnessSec-CH-UA-Form-FactorsSec-CH-UA-Full-VersionSec-CH-UA-Full-Version-ListSec-CH-UA-MobileSec-CH-UA-ModelSec-CH-UA-PlatformSec-CH-UA-Platform-VersionSec-CH-UA-WoW64Sec-CH-Viewport-HeightSec-CH-Viewport-WidthSec-CH-WidthSec-Fetch-DestSec-Fetch-ModeSec-Fetch-SiteSec-Fetch-Storage-AccessSec-Fetch-UserSec-GPCSec-Private-State-TokenSec-Private-State-Token-Crypto-VersionSec-Private-State-Token-LifetimeSec-PurposeSec-Redemption-RecordSec-Speculation-TagsSec-WebSocket-AcceptSec-WebSocket-ExtensionsSec-WebSocket-KeySec-WebSocket-ProtocolSec-WebSocket-VersionServeurServer-TimingService-WorkerService-Worker-AllowedService-Worker-Navigation-PreloadSet-CookieSet-LoginSourceMapSpeculation-RulesStrict-Transport-SecuritySupports-Loading-ModeTETiming-Allow-OriginTkTrailerTransfer-EncodingUpgradeUpgrade-Insecure-RequestsUse-As-DictionaryUser-AgentVaryViaViewport-WidthWant-Content-DigestWant-Repr-DigestWarningWidthWWW-AuthenticateX-Content-Type-OptionsX-DNS-Prefetch-ControlX-Forwarded-ForX-Forwarded-HostX-Forwarded-ProtoX-Frame-OptionsX-Permitted-Cross-Domain-PoliciesX-Powered-ByX-Robots-TagX-XSS-Protection100 Continue101 Switching Protocols102 Processing103 Early Hints200 OK201 Created202 Accepted203 Non-Authoritative Information204 No Content205 Reset Content206 Partial Content207 Multi-Status208 Already Reported226 IM Used300 Multiple Choices301 Moved Permanently302 Found303 See Other304 Not Modified307 Temporary Redirect308 Permanent Redirect400 Bad Request401 Unauthorized402 Payment Required403 Forbidden404 Not Found405 Method Not Allowed406 Not Acceptable407 Proxy Authentication Required408 Request Timeout409 Conflict410 Gone411 Length Required412 Precondition Failed413 Payload Too Large414 URI Too Long415 Unsupported Media Type416 Range Not Satisfiable417 Expectation Failed418 I'm a teapot421 Misdirected Request422 Unprocessable Entity423 Locked424 Failed Dependency425 Too Early426 Upgrade Required428 Precondition Required429 Too Many Requests431 Request Header Fields Too Large451 Unavailable For Legal Reasons500 Internal Server Error501 Not Implemented502 Bad Gateway503 Service Unavailable504 Gateway Timeout505 HTTP Version Not Supported506 Variant Also Negotiates507 Insufficient Storage508 Loop Detected510 Not Extended511 Network Authentication Requiredbase-uriblock-all-mixed-contentchild-srcconnect-srcdefault-srcfenced-frame-srcfont-srcform-actionframe-ancestorsframe-srcimg-srcmanifest-srcmedia-srcobject-srcprefetch-srcreport-toreport-urirequire-trusted-types-forsandboxscript-srcscript-src-attrscript-src-elemstyle-srcstyle-src-attrstyle-src-elemtrusted-typesupgrade-insecure-requestsworker-srcaccelerometerambient-light-sensoraria-notifyattribution-reportingautoplaybluetoothbrowsing-topicscameracaptured-surface-controlch-ua-high-entropy-valuescompute-pressurecross-origin-isolateddeferred-fetchdeferred-fetch-minimaldisplay-captureencrypted-mediafullscreengamepadgeolocationgyroscopehididentity-credentials-getidle-detectionlanguage-detectorlanguage-modellocal-fontslocal-networklocal-network-accessloopback-networkmagnetometermicrophonemidion-device-speech-recognitionotp-credentialspaymentpicture-in-pictureprivate-state-token-issuanceprivate-state-token-redemptionpublickey-credentials-createpublickey-credentials-getscreen-wake-lockserialspeaker-selectionstorage-accesssummarizertranslatorusbweb-sharewindow-managementxr-spatial-trackingCertaines 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