摘要：HTTP和FTP返回值大全(英文)

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HTTP
1xx - Informational
These status codes indicate a provisional response. The client should be prepared to receive one or more 1xx responses before receiving a regular response.
l  100 - Continue.
l  101 - Switching protocols.
2xx - Success
This class of status codes indicates that the server successfully accepted the client request.
l  200 - OK.
l  201 - Created.
l  202 - Accepted.
l  203 - Non-authoritative information.
l  204 - No content.
l  205 - Reset content.
l  206 - Partial content.
3xx - Redirection
The client browser must take more action to fulfill the request. For example, the browser may have to request a different page on the server or repeat the request by using a proxy server.
l  301 - Moved Permanently
l  302 - Object moved.
l  304 - Not modified.
l  307 - Temporary redirect.
4xx - Client Error
An error occurs, and the client appears to be at fault. For example, the client may request a page that does not exist, or the client may not provide valid authentication information.
l  400 - Bad request.
l  401 - Access denied.
n  401.1 - Logon failed.
n  401.2 - Logon failed due to server configuration.
n  401.3 - Unauthorized due to ACL on resource.
n  401.4 - Authorization failed by filter.
n  401.5 - Authorization failed by ISAPI/CGI application.
n  401.7 – Access denied by URL authorization policy on the Web server.
l  403 - Forbidden.
n  403.1 - Execute access forbidden.
n  403.2 - Read access forbidden.
n  403.3 - Write access forbidden.
n  403.4 - SSL required.
n  403.5 - SSL 128 required.
n  403.6 - IP address rejected.
n  403.7 - Client certificate required.
n  403.8 - Site access denied.
n  403.9 - Too many users.
n  403.10 - Invalid configuration.
n  403.11 - Password change.
n  403.12 - Mapper denied access.
n  403.13 - Client certificate revoked.
n  403.14 - Directory listing denied.
n  403.15 - Client Access Licenses exceeded.
n  403.16 - Client certificate is untrusted or invalid.
n  403.17 - Client certificate has expired or is not yet valid.
n  403.18 - Cannot execute requested URL in the current application pool.
n  403.19 - Cannot execute CGIs for the client in this application pool.
n  403.20 - Passport logon failed.
l  404 - Not found.
n  404.0 - File or directory not found.
n  404.1 - Web site not accessible on the requested port.
n  404.2 - Web service extension lockdown policy prevents this request.
n  404.3 - MIME map policy prevents this request.
l  405 - HTTP verb used to access this page is not allowed (method not allowed.)
l  406 - Client browser does not accept the MIME type of the requested page.
l  407 - Proxy authentication required.
l  412 - Precondition failed.
l  413 – Request entity too large.
l  414 - Request-URI too long.
l  415 – Unsupported media type.
l  416 – Requested range not satisfiable.
l  417 – Execution failed.
l  423 – Locked error.
5xx - Server Error
The server cannot complete the request because it encounters an error.
l  500 - Internal server error.
n  500.12 - Application is busy restarting on the Web server.
n  500.13 - Web server is too busy.
n  500.15 - Direct requests for Global.asa are not allowed.
n  500.16 – UNC authorization credentials incorrect.
n  500.18 – URL authorization store cannot be opened.
n  500.100 - Internal ASP error.
l  501 - Header values specify a configuration that is not implemented.
l  502 - Web server received an invalid response while acting as a gateway or proxy.
n  502.1 - CGI application timeout.
n  502.2 - Error in CGI application.
l  503 - Service unavailable.
l  504 - Gateway timeout.
l  505 - HTTP version not supported.
FTP
1xx - Positive Preliminary Reply
These status codes indicate that an action has started successfully, but the client expects another reply before it continues with a new command.
l  110 - Restart marker reply.
l  120 - Service ready in nnn minutes.
l  125 - Data connection already open; transfer starting.
l  150 - File status okay; about to open data connection.
2xx - Positive Completion Reply
An action has successfully completed. The client can execute a new command.
l  200 - Command okay.
l  202 - Command not implemented, superfluous at this site.
l  211 - System status, or system help reply.
l  212 - Directory status.
l  213 - File status.
l  214 - Help message.
l  215 - NAME system type, where NAME is an official system name from the list in the Assigned Numbers document.
l  220 - Service ready for new user.
l  221 - Service closing control connection. Logged out if appropriate.
l  225 - Data connection open; no transfer in progress.
l  226 - Closing data connection. Requested file action successful.
l  227 - Entering passive mode (h1,h2,h3,h4,p1,p2).
l  230 - User logged in, proceed.
l  250 - Requested file action okay, completed.
l  257 - "PATHNAME" created.
3xx - Positive Intermediate Reply
The command was successful, but the server needs additional information from the client to complete processing the request.
l  331 - User name okay, need password.
l  332 - Need account for login.
l  350 - Requested file action pending further information.
4xx - Transient Negative Completion Reply
The command was not successful, but the error is temporary. If the client retries the command, it may succeed.
l  421 - Service not available, closing control connection. This may be a reply to any command if the service knows it must shut down.
l  425 - Cannot open data connection.
l  426 - Connection closed; transfer aborted.
l  450 - Requested file action not taken. File unavailable.
l  451 - Requested action aborted: Local error in processing.
l  452 - Requested action not taken. Insufficient storage space in system.
5xx - Permanent Negative Completion Reply
The command was not successful, and the error is permanent. If the client retries the command, it receives the same error.
l  500 - Syntax error, command unrecognized. This may include errors such as command line too long.
l  501 - Syntax error in parameters or arguments.
l  502 - Command not implemented.
l  503 - Bad sequence of commands.
l  504 - Command not implemented for that parameter.
l  530 - Not logged in.
l  532 - Need account for storing files.
l  550 - Requested action not taken. File unavailable.
l  551 - Requested action aborted: Page type unknown.
l  552 - Requested file action aborted. Exceeded storage allocation (for current directory or dataset).
l  553 - Requested action not taken. File name not allowed.