Status Code

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icon last updated on 4/13/2011 12:32:31 PM

HTTP/1.0 vs. HTTP/1.1

Overview of status codes supported by the different HTTP versions. Take care about the capabilities of the Web browser and server.

HTTP/1.0 (RFC1945)HTTP/1.1 (RFC2068)
-100 Continue
-101 Switching Protocols
200 OK200 OK
201 Created201 Created
202 Accepted202 Accepted
-203 Non-Authoritative Information
204 No Content204 No Content
-205 Reset Content
-206 Partial Content
-300 Multiple Choices
301 Moved Permanently301 Moved Permanently
302 Moved Temporarily302 Moved Temporarily
-303 See Other
304 Not Modified304 Not Modified
-305 Use Proxy
400 Bad Request400 Bad Request
401 Unauthorized401 Unauthorized
-402 Payment Required
403 Forbidden403 Forbidden
404 Not Found404 Not Found
-405 Method Not Allowed
-406 Not Acceptable
-407 Proxy Authentication Required
-408 Request Timeout
-409 Conflict
-410 Gone
-411 Length Required
-412 Precondition Failed
-413 Request Entity Too Large
-414 Request-URI Too Long
-415 Unsupported Media Type
500 Internal Server Error500 Internal Server Error
501 Not Implemented501 Not Implemented
502 Bad Gateway502 Bad Gateway
503 Service Unavailable503 Service Unavailable
-504 Gateway Timeout
-505 HTTP Version Not Supported

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. 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.
100 Continue
To reproduce a 100 Continue status code both - the client and the server - MUST support HTTP/1.1. Just POST some content (request body) to the server.
101 Switching Protocols

Successful 2xx

This class of status code indicates that the client's request was successfully received, understood, and accepted.
200 OK
201 Created
The following ASP creates a resource and responds with a "201 Created". The URL of the created resource can be found in the location header.

Nothing happens when using Netscape Communitcator 4.7

202 Accepted
203 Non-Authoritative Information
204 No Content
The 204 response MUST NOT include a message-body, and thus is always terminated by the first empty line after the header fields.
205 Reset Content
206 Partial Content

The server has fulfilled the partial GET request for the resource. The request must have included a Range header field indicating the desired range.(*) The response MUST include either a Content-Range header field indicating the range included with this response, or a multipart/byteranges Content-Type including Content-Range fields for each part. If multipart/byteranges is not used, the Content-Length header field in the response MUST match the actual number of OCTETs transmitted in the message-body.

A cache that does not support the Range and Content-Range headers MUST NOT cache 206 (Partial) responses.

(*) This can't be recorded with a Web browser, 'cause there's no opportunity to include such a header. Use "WebHeaderAdd" in the SilkPerformer script as workaround.

Example - the first 100 bytes:

HTTP request header:
Range: bytes=0-99

SilkPerformer script:
WebHeaderAdd("Range", "bytes=0-99");

Redirection 3xx

This class of status code indicates that further action needs to be taken by the user agent in order to fulfill the request. The action required MAY be carried out by the user agent without interaction with the user if and only if the method used in the second request is GET or HEAD. A user agent SHOULD NOT automatically redirect a request more than 5 times, since such redirections usually indicate an infinite loop.
300 Multiple Choices
The requested resource corresponds to any one of a set of representations, each with its own specific location, and agent- driven negotiation information (section 12) is being provided so that the user (or user agent) can select a preferred representation and redirect its request to that location.
Location 1:
Location 2:
Location 3:
301 Moved Permanently, 302 Moved Temporarily and 303 See Other
304 Not Modified
305 Use Proxy
The requested resource MUST be accessed through the proxy given by the Location field. The Location field gives the URL of the proxy. The recipient is expected to repeat the request via the proxy.
Proxy URL:
Additional Samples

No "Location"-header:

Check redirection:

The form's action URL(status_checkRedirect.asp) redirects to the selected host/url (another asp called status_checkedRedirect.asp) and passes the url of the target in the querystring. The redirection target takes the passed url and compares it with its location.

Multiple Redirections (I):

This ASP produces multiple redirections.

Multiple Redirections (II):

This one produces multiple redirections; the urls to redirect to contain a query string (number=1, number=2).

Redirect for ever:

The browser MUST NOT redirect more than 3 times:
Click to check.

Redirect to a bookmark:

Click to redirect to top of Redirection 3xx.

Multiple Redirection with Authentication:

Click to experience the follwing:

  • Request status_authRedir0.asp?LOGON_USER=BasicAuthUser on host This document demands authentication (BasicAuthUser/BasicauthPass) and redirects you to status_authRedir1.asp?LOGON_USER=BasicAuthUserA on host demo.borland.coma.

  • status_authRedir1.asp?LOGON_USER=BasicAuthUserA on host demo.borland.coma again demands authentication (BasicAuthUserA/BasicauthPassA) and redirects you to status_authRedir2.asp?LOGON_USER=BasicAuthUserB on host demo.borland.comb.

  • status_authRedir2.asp2LOGON_USER=BasicAuthUserB on host demo.borland.comb again demands authentication (BasicAuthUserB/BasicauthPassB) and finally shows a summary.

Redirection's Location URL:

Following problem occured in SP3.5/SP3.5.1:
Every redirection's Location URL is not scripted when directly acessed (GET, POST) afterwards.
The following sample redirects to data2html.asp. Press reload and check if the request is scripted.


Client Error 4xxx

The 4xx class of status code is intended for cases in which the client seems to have erred. Except when responding to a HEAD request, the server SHOULD include an entity containing an explanation of the error situation, and whether it is a temporary or permanent condition. These status codes are applicable to any request method. User agents SHOULD display any included entity to the user.
to an HTML document to reproduce a 405 Method Not Allowed

A Proxy Server is required to reproduce a 407 Proxy Authentication Required status code.

The Netscape Proxy Server 3.5 on lab13:8080 is configured to demand an authentication (407 Proxy Authentication Required) on following URLs:

Not supported by Netscape Communitcator 4.7

Server Error 5xx

Response status codes beginning with the digit "5" indicate cases in which the server is aware that it has erred or is incapable of performing the request. Except when responding to a HEAD request, the server SHOULD include an entity containing an explanation of the error situation, and whether it is a temporary or permanent condition. User agents SHOULD display any included entity to the user. These response codes are applicable to any request method.

Load Balancing

Redirections as load balancer:

This sample redirects randomly to a page in one of multiple different subdirectories.
The images one the redirection target page are displayed using JavaScript.