HTTP SERVER STATUS CODES
| Successful Transactions | |
| 200 | The request was sucessfully completed. |
| 201 | The request was a POST (or PUT) method and was successfully completed. 201 indicates that data were sent to the server and the server created a new resource as a result of the request. |
| 202 | The request is accepted for processing, but results of the processing are unknown. |
| 203 | The GET (or HEAD) request was fulfilled, but has returned partial information. |
| 204 | The request is fulfilled, but there is no new information to send the client. |
| Redirection Transactions | |
| 300 | The requested resource is available from more than one location but the clientand server could not negotiate a preferred choice. |
| 301 | The data requested have been permanently moved to a new URL. |
| 302 | The data were found but reside at a different URL. Users may get a 302 redirectionis a URL pointing to a directory is missing the trailing slash character. |
| 304 | A GET request was sent that contained the "If-Modified-SInce" field.The server found that the document had not been modified since the date specified. |
| Error Messages | |
| 400 | Request syntax was wrong |
| 401 | Request required "Authorization" field that client did not specify. |
| 402 | Targeted operation costs money and client did not pay. |
| 403 | The requested resource is forbidden. |
| 404 | Server cannot find the requested URL. |
| 405 | Client attempted access using a method that is not allowed. |
| 406 | Resource found but not delivered because type isincompatible with types indicated by "accept" and "accepted-encoding" headers sent to server. |
| 407 | Proxy authentication required. |
| 408 | Request timeout. |
| 409 | Conflict. You may get a 409 error if you try to upload a file to your Web server which is older than the one already there |
| 410 | Resource no longer available and no forwarding information found. |
| 500 | Server encountered internal error and cannot continue. |
| 501 | Legal request, but unsupported by the particular server. |
| 502 | A secondary server or gateway did not return a valid response to the server being tasked by the client. |
| 503 | Service unavailable. Server busy. |
| 504 | A secondary server or gateway took too long to respond to the server being tasked by the client. |
D. Plänitz