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NSError错误码定义

2015-11-27 16:47 369 查看

NSURLErrorDomain

CFNetworkErrors

The greatest source of failure in iOS apps is networking. Between radios, transport, data roaming policies, proxies, security, authentication, and any number of protocol-specific negotiation, there is a lot that can go wrong.

On the plus side, the Foundation URL Loading system is incredibly mature, and takes care of most of that for you. The only negative is that the documentation for all of the various things that can go wrong is scattered across different programming guides and
headers. If you get a request failing with error

-1004

, it can be surprisingly difficult to figure out exactly what that means.

As such, here is an exhaustive, well-formatted table at your disposal:


Code	Description
-1 NSURLErrorUnknown
1 kCFHostErrorHostNotFound	Indicates that the DNS lookup failed.
2 kCFHostErrorUnknown	An unknown error occurred (a name server failure, for example). For additional information, query the kCFGetAddrInfoFailureKey to get the value returned from getaddrinfo; lookup in netdb.h
100 kCFSOCKSErrorUnknownClientVersion	The SOCKS server rejected access because it does not support connections with the requested SOCKS version.Query kCFSOCKSStatusCodeKey to recover the status code returned by the server.
101 kCFSOCKSErrorUnsupportedServerVersion	The version of SOCKS requested by the server is not supported. Query kCFSOCKSStatusCodeKey to recover the status code returned by the server. Query the kCFSOCKSVersionKey to find the version requested by the server.

SOCKS4 Errors

110 kCFSOCKS4ErrorRequestFailed	Request rejected or failed by the server.
111 kCFSOCKS4ErrorIdentdFailed	Request rejected because SOCKS server cannot connect to identd on the client.
112 kCFSOCKS4ErrorIdConflict	Request rejected because the client program and identd report different user-ids.
113 kCFSOCKS4ErrorUnknownStatusCode	The status code returned by the server is unknown.

SOCKS5 Errors

120 kCFSOCKS5ErrorBadState	The stream is not in a state that allows the requested operation.
121 kCFSOCKS5ErrorBadResponseAddr	The address type returned is not supported.
122 kCFSOCKS5ErrorBadCredentials	The SOCKS server refused the client connection because of bad login credentials.
123 kCFSOCKS5ErrorUnsupportedNegotiationMethod	The requested method is not supported. Query kCFSOCKSNegotiationMethodKey to find the method requested.
124 kCFSOCKS5ErrorNoAcceptableMethod	The client and server could not find a mutually agreeable authentication method.

FTP Errors

200

kCFFTPErrorUnexpectedStatusCode

The server returned an unexpected status code. Query the kCFFTPStatusCodeKey to get the status code returned by the server

HTTP Errors

300 kCFErrorHTTPAuthenticationTypeUnsupported	The client and server could not agree on a supported authentication type.
301 kCFErrorHTTPBadCredentials	The credentials provided for an authenticated connection were rejected by the server.
302 kCFErrorHTTPConnectionLost	The connection to the server was dropped. This usually indicates a highly overloaded server.
303 kCFErrorHTTPParseFailure	The HTTP server response could not be parsed.
304 kCFErrorHTTPRedirectionLoopDetected	Too many HTTP redirects occurred before reaching a page that did not redirect the client to another page. This usually indicates a redirect loop.
305 kCFErrorHTTPBadURL	The requested URL could not be retrieved.
306 kCFErrorHTTPProxyConnectionFailure	A connection could not be established to the HTTP proxy.
307 kCFErrorHTTPBadProxyCredentials	The authentication credentials provided for logging into the proxy were rejected.
308 kCFErrorPACFileError	An error occurred with the proxy autoconfiguration file.
309 kCFErrorPACFileAuth	The authentication credentials provided by the proxy autoconfiguration file were rejected.
310 kCFErrorHTTPSProxyConnectionFailure	A connection could not be established to the HTTPS proxy.
311 kCFStreamErrorHTTPSProxyFailureUnexpectedResponseToCONNECTMethod	The HTTPS proxy returned an unexpected status code, such as a 3xx redirect.

CFURLConnection & CFURLProtocol Errors

-998 kCFURLErrorUnknown	An unknown error occurred.
-999 kCFURLErrorCancelled NSURLErrorCancelled	The connection was cancelled.
-1000 kCFURLErrorBadURL NSURLErrorBadURL	The connection failed due to a malformed URL.
-1001 kCFURLErrorTimedOut NSURLErrorTimedOut	The connection timed out.
-1002 kCFURLErrorUnsupportedURL NSURLErrorUnsupportedURL	The connection failed due to an unsupported URL scheme.
-1003 kCFURLErrorCannotFindHost NSURLErrorCannotFindHost	The connection failed because the host could not be found.
-1004 kCFURLErrorCannotConnectToHost NSURLErrorCannotConnectToHost	The connection failed because a connection cannot be made to the host.
-1005 kCFURLErrorNetworkConnectionLost NSURLErrorNetworkConnectionLost	The connection failed because the network connection was lost.
-1006 kCFURLErrorDNSLookupFailed NSURLErrorDNSLookupFailed	The connection failed because the DNS lookup failed.
-1007 kCFURLErrorHTTPTooManyRedirects NSURLErrorHTTPTooManyRedirects	The HTTP connection failed due to too many redirects.
-1008 kCFURLErrorResourceUnavailable NSURLErrorResourceUnavailable	The connection’s resource is unavailable.
-1009 kCFURLErrorNotConnectedToInternet NSURLErrorNotConnectedToInternet	The connection failed because the device is not connected to the internet.
-1010 kCFURLErrorRedirectToNonExistentLocation NSURLErrorRedirectToNonExistentLocation	The connection was redirected to a nonexistent location.
-1011 kCFURLErrorBadServerResponse NSURLErrorBadServerResponse	The connection received an invalid server response.
-1012 kCFURLErrorUserCancelledAuthentication NSURLErrorUserCancelledAuthentication	The connection failed because the user cancelled required authentication.
-1013 kCFURLErrorUserAuthenticationRequired NSURLErrorUserAuthenticationRequired	The connection failed because authentication is required.
-1014 kCFURLErrorZeroByteResource NSURLErrorZeroByteResource	The resource retrieved by the connection is zero bytes.
-1015 kCFURLErrorCannotDecodeRawData NSURLErrorCannotDecodeRawData	The connection cannot decode data encoded with a known content encoding.
-1016 kCFURLErrorCannotDecodeContentData NSURLErrorCannotDecodeContentData	The connection cannot decode data encoded with an unknown content encoding.
-1017 kCFURLErrorCannotParseResponse NSURLErrorCannotParseResponse	The connection cannot parse the server’s response.
-1018 kCFURLErrorInternationalRoamingOff	The connection failed because international roaming is disabled on the device.
-1019 kCFURLErrorCallIsActive	The connection failed because a call is active.
-1020 kCFURLErrorDataNotAllowed	The connection failed because data use is currently not allowed on the device.
-1021 kCFURLErrorRequestBodyStreamExhausted	The connection failed because its request’s body stream was exhausted.

File Errors

-1100 kCFURLErrorFileDoesNotExist NSURLErrorFileDoesNotExist	The file operation failed because the file does not exist.
-1101 kCFURLErrorFileIsDirectory NSURLErrorFileIsDirectory	The file operation failed because the file is a directory.
-1102 kCFURLErrorNoPermissionsToReadFile NSURLErrorNoPermissionsToReadFile	The file operation failed because it does not have permission to read the file.
-1103 kCFURLErrorDataLengthExceedsMaximum NSURLErrorDataLengthExceedsMaximum	The file operation failed because the file is too large.

SSL Errors

-1200 kCFURLErrorSecureConnectionFailed NSURLErrorSecureConnectionFailed	The secure connection failed for an unknown reason.
-1201 kCFURLErrorServerCertificateHasBadDate NSURLErrorServerCertificateHasBadDate	The secure connection failed because the server’s certificate has an invalid date.
-1202 kCFURLErrorServerCertificateUntrusted NSURLErrorServerCertificateUntrusted	The secure connection failed because the server’s certificate is not trusted.
-1203 kCFURLErrorServerCertificateHasUnknownRoot NSURLErrorServerCertificateHasUnknownRoot	The secure connection failed because the server’s certificate has an unknown root.
-1204 kCFURLErrorServerCertificateNotYetValid NSURLErrorServerCertificateNotYetValid	The secure connection failed because the server’s certificate is not yet valid.
-1205 kCFURLErrorClientCertificateRejected NSURLErrorClientCertificateRejected	The secure connection failed because the client’s certificate was rejected.
-1206 kCFURLErrorClientCertificateRequired NSURLErrorClientCertificateRequired	The secure connection failed because the server requires a client certificate.

Download and File I/O Errors

-2000 kCFURLErrorCannotLoadFromNetwork NSURLErrorCannotLoadFromNetwork	The connection failed because it is being required to return a cached resource, but one is not available.
-3000 kCFURLErrorCannotCreateFile NSURLErrorCannotCreateFile	The file cannot be created.
-3001 kCFURLErrorCannotOpenFile NSURLErrorCannotOpenFile	The file cannot be opened.
-3002 kCFURLErrorCannotCloseFile NSURLErrorCannotCloseFile	The file cannot be closed.
-3003 kCFURLErrorCannotWriteToFile NSURLErrorCannotWriteToFile	The file cannot be written.
-3004 kCFURLErrorCannotRemoveFile NSURLErrorCannotRemoveFile	The file cannot be removed.
-3005 kCFURLErrorCannotMoveFile NSURLErrorCannotMoveFile	The file cannot be moved.
-3006 kCFURLErrorDownloadDecodingFailedMidStream NSURLErrorDownloadDecodingFailedMidStream	The download failed because decoding of the downloaded data failed mid-stream.
-3007 kCFURLErrorDownloadDecodingFailedToComplete NSURLErrorDownloadDecodingFailedToComplete	The download failed because decoding of the downloaded data failed to complete.

Cookie errors

-4000

kCFHTTPCookieCannotParseCookieFile

The cookie file cannot be parsed.

CFNetServices Errors

-72000L kCFNetServiceErrorUnknown	An unknown error occurred.
-72001L kCFNetServiceErrorCollision	An attempt was made to use a name that is already in use.
-72002L kCFNetServiceErrorNotFound	Not used.
-72003L kCFNetServiceErrorInProgress	A new search could not be started because a search is already in progress.
-72004L kCFNetServiceErrorBadArgument	A required argument was not provided or was not valid.
-72005L kCFNetServiceErrorCancel	The search or service was cancelled.
-72006L kCFNetServiceErrorInvalid	Invalid data was passed to a CFNetServices function.
-72007L kCFNetServiceErrorTimeout	A search failed because it timed out.
-73000L kCFNetServiceErrorDNSServiceFailure	An error from DNS discovery; look at kCFDNSServiceFailureKey to get the error number and interpret using dnssd.h

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