- Reference from http://en.wikipedia.org/wiki/List_of_HTTP_status_code
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
While many of these are common (404, 200, 403) many are not and hard to remember. This list is modified from the wc3 and the wikipedia.
1xx
informational
100
Client should continue with
request
101
Server is switching protocols
102
Server has received and is
processing the request
103
Resume aborted PUT or POST
requests
122
URI is longer than a maximum
of 2083 characters
2xx success
200
standard response for
successful HTTP requests
201
request has been fulfilled;
new resource created
202
Request accepted, processing
pending
203
Request processed, information
may be from another source
204
Request processed, no content
returned
205
Request processed, no content
returned, reset document view
206
Partial resource return due to
request header
207
XML, can contain multiple
separate responses
208
results previously returned
226
request fulfilled, response is
instance-manipulations
3xx redirection
300
multiple options for the
resource delivered
301
this and all future requests directed to the given URI
302
temporary response to request
found via alternative URI
303
permanent response to request
found via alternative URI
304
resource has not been modified
since last requested
305
content located elsewhere, retrieve from there
306
subsequent requests should use
the specified proxy
307
connect again to different URI
as provided
308
connect again to a different
URI using the same method
4xx client error
400
request cannot be fulfilled due to bad syntax
request cannot be fulfilled due to bad syntax
401
Authentication is possible but has failed
402
Payment required, reserved for
future use
403
Server refuses to respond to
request
404
Requested resource could not
be found
405
Request method not supported
by that resource
406
Content not acceptable
according to the Accept headers
407
client must first authenticate
itself with the proxy
408
server timed out waiting for
the request
409
request could not be processed
because of conflict
410
resource is no longer
available and will not be available again
411
request did not specify the
length of its content
412
server does not meet request
preconditions
413
request is larger than the
server is willing or able to process
414
URI provided was too long for
the server to process
415
server does not support media
type
416
Client has asked for
unprovidable portion of the file
417
Server cannot meet
requirements of Expect request-header field
420
Twitter rate limiting
422
Request unable to be followed
due to semantic errors
423
Resource that is being
accessed is locked
424
Request failed due to failure
of a previous request
426
Client should switch to a
different protocol
428
origin server requires the
request to be conditional
429
user has sent too many
requests in a given amount of time
431
server is unwilling to process
the request
444
server returns no information
and closes the connection
449
request should be retried
after performing action
450
Windows Parental Controls
blocking access to webpage
451
The server cannot reach the
client's mailbox.
499
connection closed by client
while HTTP server is processing
5xx server error
500
generic error message
501
server does not recognise
method or lacks ability to fulfill
502
server received an invalid
response from upstream server
503
server is currently
unavailable
504
gateway did not receive
response from upstream server
505
server does not support the
HTTP protocol version
506
Content negotiation for the
request results in a circular reference
507
Server is unable to store the
representation
508
Server detected an infinite
loop while processing the request
509
Bandwidth limit exceeded
510
Further extensions to the request are required
511
Client needs to authenticate
to gain network access
598
network read timeout behind
the proxy
599
network connect timeout behind
the proxy
