HTTP Error Messages
These error messages appear, unsuprisingly, when certain errors occur. I've listed them all because some will never be used (402, for instance, has never been used anywhere because the system was never implemented) and you're unlikely to encounter all of the rest, and because I wrote the haiku poems that accompany each one and don't want them to be hidden away...
More details can be found on Wikipedia.
Error 400: Bad Request
Your request was bad.
Your syntax was invalid.
Please try it again.
There is a syntax error in your request
The most common reason is a space in the address. Try replacing spaces with %20
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Error 401: Unauthorised
The Website you seek
is hidden from view, and so
permission denied.
You do not have permission to view this page. If you entered a user-name or password, try again
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Error 402: Payment Required
Payment is needed.
Data not accessible.
It's my fault, sorry.
The data is not available at the moment as the service provider has not yet been paid
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Error 403: Forbidden
The Website you seek
is hidden from view, and so
permission denied.
You do not have permission to view this page. If you entered a user-name or password, try again
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Error 404: Not Found
The page that you seek
does not appear to exist,
so please try again.
- If you mis-typed the URL, please try again
- If you followed a link from within this site, please email me and let me know what you clicked on.
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Error 405: Method Not Allowed
Method not allowed.
Possibilities include:
Connect, Get and Post
The method you are using to access the data is not allowed.
Possible methods include:
- Connect
- Delete
- Get
- Head
- Options
- Post
- Trace
- Put
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Error 406: Not Acceptable
Unaccepted file.
Your browser does not like it;
cannot read format.
Your browser does not accept the document format
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Error 407: Proxy Authentication Required
Browser does not have
proxy authentication.
Check parent controls.
The browser has not been authorised to access the data on the required proxy server. Most common reason is parental controls
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Error 408: Request Timeout
You ran out of time;
the server closed the socket.
Try clicking refresh.
Communications between browser and server took too long, so the server closed the socket.
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Error 409: Conflict
There is a conflict.
Too many requests for file?
Try again later.
Possible causes:
- Too many requests for the same file at once
- A conflict with a software rule
- Something to do with the DNS
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Error 410: Gone
The file that you seek
existed, but now does not.
It is not here; Gone.
The document used to exist on the server, but it has since been removed. If it is still online somewhere, that location is not known. It is likely that it has been permanently removed.
Its removal may be explained in the Retired Pages section.
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Error 411: Length Required
Content-length needed.
Try sending the file again.
Better luck next time.
When trying to send a document to the server the server did not receive a Content-Length specification in the header
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Error 412: Precondition Failed
The browser or the
server require a setting
that has not been set.
A precondition setting required by the server or browser has not been met
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Error 413: Request Entity Too Large
Process is too large;
download too big to process,
or upload can't fit.
The process it too large to be processed:
- Either the upload to too big too fit on the server
- or the page being downloaded is too large to process
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Error 414: Request-URI Too Large
URI too large;
it is too long to handle.
Make it shorter please.
The URI (Uniform Resource Identifier) is too long. It it likely to be longer than 1024, 2048, or 4096 characters
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Error 415: Unsupported Media Type
Server cannot read
the media you're loading.
It's not supported.
The server does not support the media that the browser is requesting
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Error 416: Requested Range Not Satisfiable
Range not satisfied.
The file does not fit in it.
So please try again.
The client request included a range for acceptable file size, however the document requested did not fit into that range
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Error 417: Expectation Failed
Requested action
cannot be preformed by the
web host's web server
The client's expect header requested certain actions that the server could not perform
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