4×× Client Error

417 Expectation Failed

The expectation given in the request's Expect header field¹ could not be met by at least one of the inbound servers.

• ¹ Expect RFC7231 Section 5.1.1
• Source: RFC7231 Section 6.5.14

417 Code References

Rails HTTP Status Symbol :expectation_failed

Rust HTTP Status Constant http::StatusCode::EXPECTATION_FAILED

Go HTTP Status Constant http.StatusExpectationFailed

Symfony HTTP Status Constant Response::HTTP_EXPECTATION_FAILED

Python2 HTTP Status Constant httplib.EXPECTATION_FAILED

Python3+ HTTP Status Constant http.client.EXPECTATION_FAILED

Python3.5+ HTTP Status Constant http.HTTPStatus.EXPECTATION_FAILED

.NET HTTP Status Constant System.Net.HttpStatusCode.ExpectationFailed