Http Error Codes 304
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response. 10.1 Informational 1xx This class of status code indicates a provisional response, consisting only of the Status-Line and optional headers, and is terminated by an empty http response example line. There are no required headers for this class of status code. http code 302 Since HTTP/1.0 did not define any 1xx status codes, servers MUST NOT send a 1xx response to an http 404 HTTP/1.0 client except under experimental conditions. A client MUST be prepared to accept one or more 1xx status responses prior to a regular response, even if the client does not expect http status codes cheat sheet a 100 (Continue) status message. Unexpected 1xx status responses MAY be ignored by a user agent. Proxies MUST forward 1xx responses, unless the connection between the proxy and its client has been closed, or unless the proxy itself requested the generation of the 1xx response. (For example, if a proxy adds a "Expect: 100-continue" field when it forwards a request, then it
Http 403
need not forward the corresponding 100 (Continue) response(s).) 10.1.1 100 Continue The client SHOULD continue with its request. This interim response is used to inform the client that the initial part of the request has been received and has not yet been rejected by the server. The client SHOULD continue by sending the remainder of the request or, if the request has already been completed, ignore this response. The server MUST send a final response after the request has been completed. See section 8.2.3 for detailed discussion of the use and handling of this status code. 10.1.2 101 Switching Protocols The server understands and is willing to comply with the client's request, via the Upgrade message header field (section 14.42), for a change in the application protocol being used on this connection. The server will switch protocols to those defined by the response's Upgrade header field immediately after the empty line which terminates the 101 response. The protocol SHOULD be switched only when it is advantageous to do so. For example, switching to a newer version of HTTP is advantageous over older
sections of messages Error, Forward and redirection responses may be used to contain human-readable diagnostic information. Success 2xx These codes indicate success. The body section if present is the object returned by the request. It is a MIME format object.
Http 422
It is in MIME format, and may only be in text/plain, text/html or one fo http error wordpress the formats specified as acceptable in the request. OK 200 The request was fulfilled. CREATED 201 Following a POST command, this indicates success, but http 502 the textual part of the response line indicates the URI by which the newly created document should be known. Accepted 202 The request has been accepted for processing, but the processing has not been completed. The request may or https://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html may not eventually be acted upon, as it may be disallowed when processing actually takes place. there is no facility for status returns from asynchronous operations such as this. Partial Information 203 When received in the response to a GET command, this indicates that the returned metainformation is not a definitive set of the object from a server with a copy of the object, but is from a private overlaid web. This may include annotation information about the object, https://www.w3.org/Protocols/HTTP/HTRESP.html for example. No Response 204 Server has received the request but there is no information to send back, and the client should stay in the same document view. This is mainly to allow input for scripts without changing the document at the same time. Error 4xx, 5xx The 4xx codes are intended for cases in which the client seems to have erred, and the 5xx codes for the cases in which the server is aware that the server has erred. It is impossible to distinguish these cases in general, so the difference is only informational. The body section may contain a document describing the error in human readable form. The document is in MIME format, and may only be in text/plain, text/html or one for the formats specified as acceptable in the request. Bad request 400 The request had bad syntax or was inherently impossible to be satisfied. Unauthorized 401 The parameter to this message gives a specification of authorization schemes which are acceptable. The client should retry the request with a suitable Authorization header. PaymentRequired 402 The parameter to this message gives a specification of charging schemes acceptable. The client may retry the request with a suitable ChargeTo header. Forbidden 403 The request is for something forbidden. Authorization will not help. Not found 404 The server has not found anything matching the URI given Internal Error 500 The server encountered an unexpected condition w
be returned if allowed by the client (e.g. your Web browser or our CheckUpDown robot). The client specifies this in the HTTP data http://www.checkupdown.com/status/E304.html stream sent to the Web server e.g. via If_Modified_Since headers in the request. Systems that cache or index Web resources (such as search engines) often use the 304 response to determine if the information they previously gathered for a particular URL is now out-of-date. Fixing 304 errors - general You should never see this error in your Web browser. It should simply http error present the Web page from its cache - because it believes the page has not changed since it was last cached. If your client is not a Web browser, then it should equally be able to present the page from a cache. If unable to do so, it is not using the If_Modified_Since or related headers correctly. Fixing 304 errors - CheckUpDown You http error codes should never see this error at all for the CheckUpDown service. It indicates defective programming by us or the developers of the Web server software. Either we or they are not respecting HTTP protocols completely. The 304 status code should only be returned if we allow it in the HTTP data stream we send to the Web server. Because we keep no records of the actual content of your URL Web page, we specifically disallow the 304 response in the HTTP data stream we send. So if the Web server implements the HTTP protocol properly, it should never send an 304 status code back to us. This response is not what we expect, so we actively report it as an error even though it does not necessarily mean that the Web site is down. Please contact us directly (email preferred) whenever you encounter 304 errors. Only we can resolve them for you. Unfortunately this may take some time, because we have to analyse the underlying HTTP data streams and may have to liaise with your ISP and the vendor of the Web server software to agree