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The HTTP 417 Expectation Failed client error response code indicates that the expectation given in the request's Expect header could not be met.

See the Expect header for more details.

Status

417 Expectation Failed

Specifications

Specification Title
RFC 7231, section 6.5.14: 417 Expectation Failed Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content

See also

Document Tags and Contributors

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