response code : Java Glossary

response code

Everyone is familiar with error 404 not found. The codes are arranged in bands:

-1 : response code not available.
0-99 : ok
100s : ok
200s : ok. 200 is a common usual success response.
300s : redirect
400s : client error
500s : server error

HTTP (Hypertext Transfer Protocol) Response Codes
Code	HttpURLConnection Constant	Meaning	Notes
200	HTTP_OK	OK	This is the most common code when all went well.
201	HTTP_CREATED	Created
202	HTTP_ACCEPTED	Accepted
203	HTTP_NOT_AUTHORITATIVE	Non-Authoritative Information
204	HTTP_NO_CONTENT	No Content
205	HTTP_RESET	Reset Content
206	HTTP_PARTIAL	Partial Content
300	HTTP_MULT_CHOICE	Multiple Choices
301	HTTP_MOVED_PERM	Moved Permanently	This means the page has moved permanently. Please change your links since the old URL (Uniform Resource Locator) will probably soon stop working. The replacement relative URL is in the location field of the response header.
302	HTTP_MOVED_TEMP	Temporary Redirect	You should repeat the GET with the relative URL in the location field of the response header. You should not update your records with that redirected URL since it is valid only for this one use. You can usually ask your HTTP manager to follow such link chains for you transparently. You can thus for all practical purposes assume this code will never occur.
303	HTTP_SEE_OTHER	See Other	This usually means the page has changed from http:// to https:// or vice versa. Please update your links.
304	HTTP_NOT_MODIFIED	Not Modified	Not modified since last time you requested the page, presuming you still have the previous copy. Used in conjuction with If-Modified-Since in the request header.
305	HTTP_USE_PROXY	Use Proxy
400	HTTP_BAD_REQUEST	Bad Request
401	HTTP_UNAUTHORIZED	Unauthorized	This is the most common response when you have tried to access a page that requires logon first.
402	HTTP_PAYMENT_REQUIRED	Payment Required
403	HTTP_FORBIDDEN	Forbidden	You get this if you are hitting a site with simultaneous probes.
404	HTTP_NOT_FOUND	Not Found	This is the most common code when the URL does not exist.
405	HTTP_BAD_METHOD	Method Not Allowed
406	HTTP_NOT_ACCEPTABLE	Not Acceptable
407	HTTP_PROXY_AUTH	Proxy Authentication Required
408	HTTP_CLIENT_TIMEOUT	Request Time-Out
409	HTTP_CONFLICT	Conflict
410	HTTP_GONE	Gone
411	HTTP_LENGTH_REQUIRED	Length Required
412	HTTP_PRECON_FAILED	Precondition Failed
413	HTTP_ENTITY_TOO_LARGE	Request Entity Too Large
414	HTTP_REQ_TOO_LONG	Request-URI Too Large
415	HTTP_UNSUPPORTED_TYPE	Unsupported Media Type
500	HTTP_SERVER_ERROR	Internal Server Error
500	HTTP_INTERNAL_ERROR	Internal Server Error
501	HTTP_NOT_IMPLEMENTED	Not Implemented
502	HTTP_BAD_GATEWAY	Bad Gateway
503	HTTP_UNAVAILABLE	Service Unavailable
504	HTTP_GATEWAY_TIMEOUT	Gateway Timeout
505	HTTP_VERSION	HTTP Version Not Supported

There are other HTTP errors in the series documented as part of HttpURLConnection and HttpServletResponse.

Oracle’s Javadoc on getResponseMessage class : available:

on the web at Oracle.com
in the current JDK 1.7.0_04 or in the old JDK 1.6.0_32 on your local Windows J: drive.

Oracle’s Javadoc on HTTP response codes : available:

on the web at Oracle.com
in the current JDK 1.7.0_04 or in the old JDK 1.6.0_32 on your local Windows J: drive.

Server HTTP response codes : available:

on the web at oracle.com
in the EE SDK: J:\glassfishv3\glassfish\docs\api\javax\servlet\http\HttpServletResponse.html on your local Windows J: drive

HTTP
Response Code explanations
servlet

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