curl_easy_perform 返回值说明
转载自 亮剑独步江湖

response=curl_easy_perform(curl);
response返回的状态值
CURLE_OK: printf("send ok!\n");
CURLE_HTTP_POST_ERROR: printf("post error!\n");
CURLE_COULDNT_CONNECT: printf("cannot connect to server\n");


CURLE_OK = 0, 0: no error
CURLE_UNSUPPORTED_PROTOCOL, 1: unsupported protocol
CURLE_FAILED_INIT, 2: failed init
CURLE_URL_MALFORMAT, 3: URL using bad/illegal format or missing URL
CURLE_URL_MALFORMAT_USER, 4: unknown error
CURLE_COULDNT_RESOLVE_PROXY, 5: couldn't resolve proxy name
CURLE_COULDNT_RESOLVE_HOST, 6: couldn't resolve host name
CURLE_COULDNT_CONNECT, 7: couldn't connect to server
CURLE_FTP_WEIRD_SERVER_REPLY, 8: FTP: weird server reply
CURLE_FTP_ACCESS_DENIED,
CURLE_FTP_USER_PASSWORD_INCORRECT, 10: unknown error
CURLE_FTP_WEIRD_PASS_REPLY, 11: FTP: unknown PASS reply
CURLE_FTP_WEIRD_USER_REPLY, 12: FTP: unknown USER reply
CURLE_FTP_WEIRD_PASV_REPLY, 13: FTP: unknown PASV reply
CURLE_FTP_WEIRD_227_FORMAT, 14: FTP: unknown 227 response format
CURLE_FTP_CANT_GET_HOST, 15: FTP: can't figure out the host in the PASV response
CURLE_FTP_CANT_RECONNECT, 16: FTP: can't connect to server the response code is unknown
CURLE_FTP_COULDNT_SET_BINARY, 17: FTP: couldn't set binary mode
CURLE_PARTIAL_FILE, 18: Transferred a partial file
CURLE_FTP_COULDNT_RETR_FILE, 19: FTP: couldn't retrieve (RETR failed) the specified file
CURLE_FTP_WRITE_ERROR, 20: FTP: the post-transfer acknowledge response was not OK
CURLE_FTP_QUOTE_ERROR, 21: FTP: a quote command returned error
CURLE_HTTP_RETURNED_ERROR, 22: HTTP response code said error
CURLE_WRITE_ERROR, 23: failed writing received data to disk/application
CURLE_MALFORMAT_USER, 24: unknown error
CURLE_UPLOAD_FAILED, 25: upload failed (at start/before it took off)
CURLE_READ_ERROR, 26: failed to open/read local data from file/application
CURLE_OUT_OF_MEMORY, 27: out of memory

CURLE_OPERATION_TIMEOUTED, 28: a timeout was reached
CURLE_FTP_COULDNT_SET_ASCII, 29: FTP could not set ASCII mode (TYPE A)
CURLE_FTP_PORT_FAILED, 30: FTP command PORT failed
CURLE_FTP_COULDNT_USE_REST, 31: FTP command REST failed
CURLE_FTP_COULDNT_GET_SIZE, 32: FTP command SIZE failed
CURLE_HTTP_RANGE_ERROR, 33: a range was requested but the server did not deliver it
CURLE_HTTP_POST_ERROR, 34: internal problem setting up the POST
CURLE_SSL_CONNECT_ERROR, 35: SSL connect error
CURLE_BAD_DOWNLOAD_RESUME, 36: couldn't resume download
CURLE_FILE_COULDNT_READ_FILE, 37: couldn't read a file:// file
CURLE_LDAP_CANNOT_BIND, 38: LDAP: cannot bind
CURLE_LDAP_SEARCH_FAILED, 39: LDAP: search failed
CURLE_LIBRARY_NOT_FOUND, 40: a required shared library was not found
>write的返回值

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