Custom HTTP Response Codes: Recommended Client Behavior

As an http client (web browser or other application), it handles non-standard HTTP responses, such as 190, 290, 320, 420, 540. Virtually anyone that is not defined by RFC2616.

Refer to a commonly used standard or recommendation similar to RFC.

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http://greenbytes.de/tech/webdav/draft-ietf-httpbis-p2-semantics-25.html#rfc.section.6.p.2 :

HTTP . HTTP- , . , , x00 , , .

, 471, , - , , 400. , .

. . 5 :

1xx (Informational): The request was received, continuing process
2xx (Successful): The request was successfully received, understood, and accepted
3xx (Redirection): Further action needs to be taken in order to complete the request
4xx (Client Error): The request contains bad syntax or cannot be fulfilled
5xx (Server Error): The server failed to fulfill an apparently valid request
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