Status Codes - cUrl
0
OK
All fine. Proceed as usual.
1
UNSUPPORTED_PROTOCOL
The URL you passed to libcurl used a protocol that this 'curl.exe' does not support. it can be a misspelled protocol string or just a protocol that curl has no code for.
2
FAILED_INIT
Very early initialization code failed. This is likely to be an internal error or problem, or a resource problem where something fundamental couldn't get done at init time.
3
URL_MALFORMAT
The URL was not properly formatted.
4
NOT_BUILT_IN
A requested feature, protocol or option was not found built-in in this curl.exe. This means that a feature or option was not enabled or explicitly disabled when curl.exe was built and in order to get it to function you have to get a download another “curl.exe” executable.
5
COULDNT_RESOLVE_PROXY
Couldn't resolve proxy. The given proxy host could not be resolved.
6
COULDNT_RESOLVE_HOST
Couldn't resolve host. The given remote host was not resolved.
7
COULDNT_CONNECT
Failed to connect() to host or proxy.
8
FTP_WEIRD_SERVER_REPLY
The server sent data libcurl couldn't parse. This error code is used for more than just FTP and is aliased as CURLE_WEIRD_SERVER_REPLY since 7.51.0.
9
REMOTE_ACCESS_DENIED
We were denied access to the resource given in the URL. For FTP, this occurs while trying to change to the remote directory.
10
FTP_ACCEPT_FAILED
While waiting for the server to connect back when an active FTP session is used, an error code was sent over the control connection or similar.
11
FTP_WEIRD_PASS_REPLY
After having sent the FTP password to the server, libcurl expects a proper reply. This error code indicates that an unexpected code was returned.
12
FTP_ACCEPT_TIMEOUT
During an active FTP session while waiting for the server to connect, the CURLOPT_ACCEPTTIMEOUT_MS (or the internal default) timeout expired.
13
FTP_WEIRD_PASV_REPLY
libcurl failed to get a sensible result back from the server as a response to either a PASV or a EPSV command. The server is flawed.
14
FTP_WEIRD_227_FORMAT
FTP servers return a 227-line as a response to a PASV command. If libcurl fails to parse that line, this return code is passed back.
15
FTP_CANT_GET_HOST
An internal failure to lookup the host used for the new connection.
16
HTTP2
A problem was detected in the HTTP2 framing layer. This is somewhat generic and can be one out of several problems, see the error buffer for details.
17
FTP_COULDNT_SET_TYPE
Received an error when trying to set the transfer mode to binary or ASCII.
18
PARTIAL_FILE
A file transfer was shorter or larger than expected. This happens when the server first reports an expected transfer size, and then delivers data that doesn't match the previously given size.
19
FTP_COULDNT_RETR_FILE
This was either a weird reply to a 'RETR' command or a zero byte transfer complete.
21
QUOTE_ERROR
hen sending custom 'QUOTE commands to the remote server, one of the commands returned an error code that was 400 or higher (for FTP) or otherwise indicated unsuccessful completion of the command.
22
HTTP_RETURNED_ERROR
This is returned if CURLOPT_FAILONERROR is set TRUE and the HTTP server returns an error code that is >= 400.
23
WRITE_ERROR
An error occurred when writing received data to a local file, or an error was returned to libcurl from a write callback.
25
UPLOAD_FAILED
Failed starting the upload. For FTP, the server typically denied the STOR command. The error buffer usually contains the server's explanation for this.
26
READ_ERROR
There was a problem reading a local file or an error returned by the read callback.
27
OUT_OF_MEMORY
A memory allocation request failed. This is serious badness and things are severely screwed up if this ever occurs.
28
OPERATION_TIMEDOUT
Operation timeout. The specified time-out period was reached according to the conditions.
30
FTP_PORT_FAILED
The FTP PORT command returned error. This mostly happens when you haven't specified a good enough address for libcurl to use. See CURLOPT_FTPPORT.
31
FTP_COULDNT_USE_REST
The FTP REST command returned error. This should never happen if the server is sane.
33
RANGE_ERROR
The server does not support or accept range requests.
34
HTTP_POST_ERROR
This is an odd error that mainly occurs due to internal confusion.
35
SSL_CONNECT_ERROR
A problem occurred somewhere in the SSL/TLS handshake. You really want the error buffer and read the message there as it pinpoints the problem slightly more. Could be certificates (file formats, paths, permissions), passwords, and others.
36
BAD_DOWNLOAD_RESUME
The download could not be resumed because the specified offset was out of the file boundary.
37
FILE_COULDNT_READ_FILE
A file given with FILE:// couldn't be opened. Most likely because the file path doesn't identify an existing file. Did you check file permissions?
38
LDAP_CANNOT_BIND
LDAP cannot bind. LDAP bind operation failed.
39
LDAP_SEARCH_FAILED
LDAP search failed.
41
FUNCTION_NOT_FOUND
Function not found. A required zlib function was not found.
42
ABORTED_BY_CALLBACK
Aborted by callback. A callback returned 'abort' to libcurl.
43
BAD_FUNCTION_ARGUMENT
Internal error. A function was called with a bad parameter.
45
INTERFACE_FAILED
Interface error. A specified outgoing interface could not be used. Set which interface to use for outgoing connections' source IP address with CURLOPT_INTERFACE.
47
TOO_MANY_REDIRECTS
Too many redirects. When following redirects, libcurl hit the maximum amount. Set your limit with CURLOPT_MAXREDIRS.
48
UNKNOWN_OPTION
An option passed to libcurl is not recognized/known. Refer to the appropriate documentation. This is most likely a problem in the program that uses libcurl. The error buffer might contain more specific information about which exact option it concerns.
49
TELNET_OPTION_SYNTAX
A telnet option string was Illegally formatted.
51
PEER_FAILED_VERIFICATION
The remote server's SSL certificate or SSH md5 fingerprint was deemed not OK.
52
GOT_NOTHING
Nothing was returned from the server, and under the circumstances, getting nothing is considered an error.
53
SSL_ENGINE_NOTFOUND
The specified crypto engine wasn't found.
54
SSL_ENGINE_SETFAILED
Failed setting the selected SSL crypto engine as default!
55
SEND_ERROR
Failed sending network data.
56
RECV_ERROR
Failure with receiving network data.
58
SSL_CERTPROBLEM
problem with the local client certificate.
59
SSL_CIPHER
Couldn't use specified cipher.
60
SSL_CACERT
Peer certificate cannot be authenticated with known CA certificates.
61
BAD_CONTENT_ENCODING
Unrecognized transfer encoding.
62
LDAP_INVALID_URL
Invalid LDAP URL.
63
FILESIZE_EXCEEDED
Maximum file size exceeded.
64
USE_SSL_FAILED
Requested FTP SSL level failed.
65
SEND_FAIL_REWIND
When doing a send operation curl had to rewind the data to retransmit, but the rewinding operation failed.
66
SSL_ENGINE_INITFAILED
Initiating the SSL Engine failed.
67
LOGIN_DENIED
The remote server denied curl to login (Added in 7.13.1)
68
TFTP_NOTFOUND
File not found on TFTP server.
69
TFTP_PERM
Permission problem on TFTP server.
70
REMOTE_DISK_FULL
Out of disk space on the server.
71
TFTP_ILLEGAL
Illegal TFTP operation.
72
TFTP_UNKNOWNID
Unknown TFTP transfer ID.
73
REMOTE_FILE_EXISTS
File already exists and will not be overwritten.
74
TFTP_NOSUCHUSER
This error should never be returned by a properly functioning TFTP server.
75
CONV_FAILED
Character conversion failed.
76
CONV_REQD
Caller must register conversion callbacks.
77
SSL_CACERT_BADFILE
Problem with reading the SSL CA cert (path? access rights?)
78
REMOTE_FILE_NOT_FOUND
The resource referenced in the URL does not exist.
79
SSH
An unspecified error occurred during the SSH session.
80
SSL_SHUTDOWN_FAILED
Failed to shut down the SSL connection.
81
AGAIN
Socket is not ready for send/recv wait till it's ready and try again. This return code is only returned from curl_easy_recv and curl_easy_send (Added in 7.18.2)
82
SSL_CRL_BADFILE
Failed to load CRL file (Added in 7.19.0)
83
SSL_ISSUER_ERROR
Issuer check failed (Added in 7.19.0)
84
FTP_PRET_FAILED
The FTP server does not understand the PRET command at all or does not support the given argument. Be careful when using CURLOPT_CUSTOMREQUEST, a custom LIST command will be sent with PRET CMD before PASV as well. (Added in 7.20.0)
85
RTSP_CSEQ_ERROR
Mismatch of RTSP CSeq numbers.
86
RTSP_SESSION_ERROR
Mismatch of RTSP Session Identifiers.
87
FTP_BAD_FILE_LIST
Unable to parse FTP file list (during FTP wildcard downloading).
88
CHUNK_FAILED
Chunk callback reported error.
89
NO_CONNECTION_AVAILABLE
(For internal use only, will never be returned by libcurl) No connection available, the session will be queued. (added in 7.30.0)
90
SSL_PINNEDPUBKEYNOTMATCH
Failed to match the pinned key specified with CURLOPT_PINNEDPUBLICKEY.
91
SSL_INVALIDCERTSTATUS
Status returned failure when asked with CURLOPT_SSL_VERIFYSTATUS.
92
HTTP2_STREAM
Stream error in the HTTP/2 framing layer.
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