Common Web Error Codes
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2009 in Tech blog Sometimes when you try to visit web page, you’re met with an HTTP error message. It’s a message from the web server that something went wrong. In some cases it
Common Http Error Codes
could be a mistake you made, but often it’s the site’s fault. Each type common sql error codes of error has an HTTP error code dedicated to it. For example, if you try to access a non-existing page on common db2 error codes a website, you will be met by the familiar 404 error. Now, you might wonder, which are the most common HTTP errors that people encounter when they surf the Web? That is the question we’ll
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answer in this article. Google to the rescue Why not let millions of Web users tell us themselves what errors they encounter the most? In an indirect way we can do that via Google. The basic idea here is that some of the people who encounter errors when they visit websites will want to know more about that error, and will go to the nearest search engine to do so. In
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short, Google’s search statistics should in this case be able to give us a pretty good idea of which HTTP errors are most common. Using Google Insights for Search (a great tool for estimating the “popularity” of search terms) we went through all of the different HTTP error codes that exist, comparing them against each other. When the dust settled from this little shootout, we had the top list you can see here below. The top 5 errors, according to Google Here they are, listed and explained in reverse order, the five most common HTTP errors. Drumroll, please… 5. HTTP error 401 (unauthorized) This error happens when a website visitor tries to access a restricted web page but isn’t authorized to do so, usually because of a failed login attempt. 4. HTTP error 400 (bad request) This is basically an error message from the web server telling you that the application you are using (e.g. your web browser) accessed it incorrectly or that the request was somehow corrupted on the way. 3. HTTP error 403 (forbidden) This error is similar to the 401 error, but note the difference between unauthorized and forbidden. In this case no login opportunity was available. This can for example happen if you try t
referer DNT X-Forwarded-For Status codes 301 Moved Permanently 302 Found 303 See Other 403 Forbidden 404 Not Found 451 Unavailable For Legal Reasons v t e This is a list of Hypertext Transfer Protocol (HTTP) response netbackup common error codes status codes. It includes codes from IETF internet standards, other IETF RFCs, other
Web Error Codes 500
specifications, and some additional commonly used codes. The first digit of the status code specifies one of five classes of response; web server error codes an HTTP client must recognise these five classes at a minimum. The phrases used are the standard wordings, but any human-readable alternative can be provided. Unless otherwise stated, the status code is part of the http://royal.pingdom.com/2009/05/06/the-5-most-common-http-errors-according-to-google/ HTTP/1.1 standard (RFC 7231).[1] The Internet Assigned Numbers Authority (IANA) maintains the official registry of HTTP status codes.[2] Microsoft IIS sometimes uses additional decimal sub-codes to provide more specific information,[3] but not all of those are here (note that these sub-codes only appear in the response payload and in documentation; not in the place of an actual HTTP status code). Contents 1 1xx Informational 2 2xx Success 3 3xx Redirection https://en.wikipedia.org/wiki/List_of_HTTP_status_codes 4 4xx Client Error 5 5xx Server Error 6 Unofficial codes 6.1 Internet Information Services 6.2 nginx 6.3 CloudFlare 7 See also 8 Notes 9 References 10 External links 1xx Informational[edit] Request received, continuing process. 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. Since HTTP/1.0 did not define any 1xx status codes, servers must not[note 1] send a 1xx response to an HTTP/1.0 client except under experimental conditions.[4] 100 Continue The server has received the request headers and the client should proceed to send the request body (in the case of a request for which a body needs to be sent; for example, a POST request). Sending a large request body to a server after a request has been rejected for inappropriate headers would be inefficient. To have a server check the request's headers, a client must send Expect: 100-continue as a header in its initial request and receive a 100 Continue status code in response before sending the body. The response 417 Expectation Failed indicates the request should not be continued.[2] 101 Switching Protocols The requester has asked the server to switch protocols and the server has agreed to do
& 9 Most Common HTTP Errors Explained Published by Anna Monus,in Hosting Apart from the 404 error, how many other HTML error pages do you know about? Have you http://www.hongkiat.com/blog/common-http-errors/ ever thought about what happens in the background when you see any https://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html of these HTML error pages on your screen? Those codes are meant to convey important information to the user. It can be useful to know them better, especially if you are a website owner. Using them properly reduces your bounce rate, improves your search engine ranking and gives you knowledge error codes on the performance of your site. Understanding Status Codes Behind every error page you see on the web there is an HTTP status code sent by the web server. Status codes come in the format of 3 digit numbers. The first digit marks the class of the status code: 1XX status codes have informational purposes 2XX indicates success 3XX is for redirection None web error codes of these three classes result in an HTML error page as in this cases the client knows what to do and goes on with the task without hesitation. What we usually see are the 4XX and 5XX kind: 4XX represent client-side errors 5XXs indicate problems on the server side HTML error pages are displayed in these cases because the client has no idea about what how to move on. Let’s see what happens in the background when something goes south and what you can do about it. Client-Side Errors (4XX) 1. 400 – Bad Request Whenever the client sends a request the server is unable to understand, the 400 Bad Request error page shows up. It usually happens when the data sent by the browser doesn’t respect the rules of the HTTP protocol, so the web server is clueless about how to process a request containing a malformed syntax. Pin itWhen you see a 400 error page the reason is most likely that there’s something unstable on the client side: a not sufficiently protected operating system, an instable internet connection, a defective browser or a caching problem
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 no required headers for this class of status code. Since HTTP/1.0 did not define any 1xx status codes, servers MUST NOT send a 1xx response to an 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 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 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 versions, and switching to a real-time, synchronous protocol might be advantageous when delivering resources that use such features. 10.2 Successful 2xx This class of status code indicates that the client's request was successfully received, understood, and accepted. 10.2.1 200 OK The request has succeeded. The information returned with the response is dependent on the method used in the request, for example: GET an entity corresponding to the requested resource is sent in the response; HEAD the entity-header fields corresponding to the requested resource are sent in the response without any message-body; POST an entity describing or containing the