Http Error Code 503
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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 line. There http 504 are no required headers for this class of status code. Since HTTP/1.0 http error 503 iis did not define any 1xx status codes, servers MUST NOT send a 1xx response to an HTTP/1.0 client except under http 502 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 a 100 (Continue) status
503 Service Unavailable Fix
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 need not forward the corresponding 100 http code 302 (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 versions, and switching to a real-time, synchronous protocol might be advantageous when delivering res
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 line. There are http status codes cheat sheet no required headers for this class of status code. Since HTTP/1.0 did not
How To Fix Http Error 503. The Service Is Unavailable
define any 1xx status codes, servers MUST NOT send a 1xx response to an HTTP/1.0 client except under experimental
Http 404
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 a 100 (Continue) status message. Unexpected https://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html 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 need not forward the corresponding 100 (Continue) response(s).) 10.1.1 https://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html 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 versions, and switching to a real-time, synchronous protocol might be advantageous when delivering resources that use such features. 10.2 Suc
& Network Digital Cameras Home Theater Getting More Help Buy Buying Guides Product Reviews Software & Apps Do More Web & Search Social Media http://pcsupport.about.com/od/findbyerrormessage/a/503error.htm Gaming New & Next Fix Internet & Network 503 Service Unavailable How To Fix a 503 Service Unavailable Error Share Pin Email daitoZen / Getty Images Internet & http://www.iana.org/assignments/http-status-codes Network Error Messages Basics by Tim Fisher Updated February 23, 2016 The 503 Service Unavailable error is an HTTP status code that means the web site's server is simply not available http error right now.Are You the Webmaster? See the Fixing 503 Errors on Your Own Site section further down the page for some things to look at if you're not sure what to do.A 503 error message can be customized by the website it appears on, or the server software that generates it, so the ways in which you might see it vary http error 503 greatly. How You Might See the 503 ErrorHere are the most common ways you might see the "service unavailable" error:"503 Service Unavailable""503 Service Temporarily Unavailable""Http/1.1 Service Unavailable""HTTP Server Error 503""Service Unavailable - DNS Failure""503 Error""HTTP 503""HTTP Error 503""Error 503 Service Unavailable"503 Service Unavailable errors can appear in any browser in any operating system, including Windows 10 back through Windows XP, Mac OS, Linux, etc.... even your smartphone or other nontraditional computer. If it has Internet access, then you could see a 503 in certain situations.The 503 Service Unavailable error displays inside the browser window, just as web pages do.Cause of 503 Service Unavailable ErrorsMost of the time, a 503 error occurs because the server is too busy or because there's maintenance being performed on it.Note: Sites that use Microsoft IIS may provide more specific information about the cause of a 503 Service Unavailable error by suffixing a number after the 503 as in HTTP Error 503.2 - Service Unavailable which means Concurrent request limit exceeded. See More Ways You MIght See a 503 Error near the bottom of the page for
1xx: Informational - Request received, continuing process 2xx: Success - The action was successfully received, understood, and accepted 3xx: Redirection - Further action must 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 Available Formats CSV Value Description Reference 100 Continue [RFC7231, Section 6.2.1] 101 Switching Protocols [RFC7231, Section 6.2.2] 102 Processing [RFC2518] 103-199 Unassigned 200 OK [RFC7231, Section 6.3.1] 201 Created [RFC7231, Section 6.3.2] 202 Accepted [RFC7231, Section 6.3.3] 203 Non-Authoritative Information [RFC7231, Section 6.3.4] 204 No Content [RFC7231, Section 6.3.5] 205 Reset Content [RFC7231, Section 6.3.6] 206 Partial Content [RFC7233, Section 4.1] 207 Multi-Status [RFC4918] 208 Already Reported [RFC5842] 209-225 Unassigned 226 IM Used [RFC3229] 227-299 Unassigned 300 Multiple Choices [RFC7231, Section 6.4.1] 301 Moved Permanently [RFC7231, Section 6.4.2] 302 Found [RFC7231, Section 6.4.3] 303 See Other [RFC7231, Section 6.4.4] 304 Not Modified [RFC7232, Section 4.1] 305 Use Proxy [RFC7231, Section 6.4.5] 306 (Unused) [RFC7231, Section 6.4.6] 307 Temporary Redirect [RFC7231, Section 6.4.7] 308 Permanent Redirect [RFC7538] 309-399 Unassigned 400 Bad Request [RFC7231, Section 6.5.1] 401 Unauthorized [RFC7235, Section 3.1] 402 Payment Required [RFC7231, Section 6.5.2] 403 Forbidden [RFC7231, Section 6.5.3] 404 Not Found [RFC7231, Section 6.5.4] 405 Method Not Allowed [RFC7231, Section 6.5.5] 406 Not Acceptable [RFC7231, Section 6.5.6] 407 Proxy Authentication Required [RFC7235, Section 3.2] 408 Request Timeout [RFC7231, Section 6.5.7] 409 Conflict [RFC7231, Section 6.5.8] 410 Gone [RFC7231, Section 6.5.9] 411 Length Required [RFC7231, Section 6.5.10] 412 Precondition Failed [RFC7232, Section 4.2] 413 Payload Too Large [RFC7231, Section 6.5.11] 414 URI Too Long