libcurl - curl_easy_setopt() (original) (raw)

curl_easy_setopt - set options for a curl easy handle

Name

curl_easy_setopt - set options for a curl easy handle

Synopsis

#include <curl/curl.h> CURLcode curl_easy_setopt(CURL *handle, CURLoption option, parameter);

Description

curl_easy_setopt is used to tell libcurl how to behave. By setting the appropriate options, the application can change libcurl's behavior. All options are set with an option followed by a parameter. That parameter can be a long, a function pointer, an object pointer or a curl_off_t, depending on what the specific option expects. Read this manual carefully as bad input values may cause libcurl to behave badly. You can only set one option in each function call. A typical application uses many curl_easy_setopt calls in the setup phase.

Options set with this function call are valid for all forthcoming transfers performed using this handle. The options are not in any way reset between transfers, so if you want subsequent transfers with different options, you must change them between the transfers. You can optionally reset all options back to internal default with curl_easy_reset.

Strings passed to libcurl as 'char *' arguments, are copied by the library; the string storage associated to the pointer argument may be discarded or reused after curl_easy_setopt returns. The only exception to this rule is really CURLOPT_POSTFIELDS, but the alternative that copies the string CURLOPT_COPYPOSTFIELDS has some usage characteristics you need to read up on. This function does not accept input strings longer than CURL_MAX_INPUT_LENGTH (8 MB).

The order in which the options are set does not matter.

Before version 7.17.0, strings were not copied. Instead the user was forced keep them available until libcurl no longer needed them.

The handle is the return code from a curl_easy_init or curl_easy_duphandle call.

Options

CURLOPT_ABSTRACT_UNIX_SOCKET

Path to an abstract Unix domain socket. See CURLOPT_ABSTRACT_UNIX_SOCKET

CURLOPT_ACCEPTTIMEOUT_MS

Timeout for waiting for the server's connect back to be accepted. See CURLOPT_ACCEPTTIMEOUT_MS

CURLOPT_ACCEPT_ENCODING

Accept-Encoding and automatic decompressing data. See CURLOPT_ACCEPT_ENCODING

CURLOPT_ADDRESS_SCOPE

IPv6 scope for local addresses. See CURLOPT_ADDRESS_SCOPE

CURLOPT_ALTSVC

Specify the Alt-Svc: cache filename. See CURLOPT_ALTSVC

CURLOPT_ALTSVC_CTRL

Enable and configure Alt-Svc: treatment. See CURLOPT_ALTSVC_CTRL

CURLOPT_APPEND

Append to remote file. See CURLOPT_APPEND

CURLOPT_AUTOREFERER

Automatically set Referer: header. See CURLOPT_AUTOREFERER

CURLOPT_AWS_SIGV4

AWS HTTP V4 Signature. See CURLOPT_AWS_SIGV4

CURLOPT_BUFFERSIZE

Ask for alternate buffer size. See CURLOPT_BUFFERSIZE

CURLOPT_CAINFO

CA cert bundle. See CURLOPT_CAINFO

CURLOPT_CAINFO_BLOB

CA cert bundle memory buffer. See CURLOPT_CAINFO_BLOB

CURLOPT_CAPATH

Path to CA cert bundle. See CURLOPT_CAPATH

CURLOPT_CA_CACHE_TIMEOUT

Timeout for CA cache. See CURLOPT_CA_CACHE_TIMEOUT

CURLOPT_CERTINFO

Extract certificate info. See CURLOPT_CERTINFO

CURLOPT_CHUNK_BGN_FUNCTION

Callback for wildcard download start of chunk. See CURLOPT_CHUNK_BGN_FUNCTION

CURLOPT_CHUNK_DATA

Data pointer to pass to the chunk callbacks. See CURLOPT_CHUNK_DATA

CURLOPT_CHUNK_END_FUNCTION

Callback for wildcard download end of chunk. See CURLOPT_CHUNK_END_FUNCTION

CURLOPT_CLOSESOCKETDATA

Data pointer to pass to the close socket callback. See CURLOPT_CLOSESOCKETDATA

CURLOPT_CLOSESOCKETFUNCTION

Callback for closing socket. See CURLOPT_CLOSESOCKETFUNCTION

CURLOPT_CONNECTTIMEOUT

Timeout for the connection phase. See CURLOPT_CONNECTTIMEOUT

CURLOPT_CONNECTTIMEOUT_MS

Millisecond timeout for the connection phase. See CURLOPT_CONNECTTIMEOUT_MS

CURLOPT_CONNECT_ONLY

Only connect, nothing else. See CURLOPT_CONNECT_ONLY

CURLOPT_CONNECT_TO

Connect to a specific host and port. See CURLOPT_CONNECT_TO

CURLOPT_CONV_FROM_NETWORK_FUNCTION

OBSOLETE Callback for code base conversion. See CURLOPT_CONV_FROM_NETWORK_FUNCTION

CURLOPT_CONV_FROM_UTF8_FUNCTION

OBSOLETE Callback for code base conversion. See CURLOPT_CONV_FROM_UTF8_FUNCTION

CURLOPT_CONV_TO_NETWORK_FUNCTION

OBSOLETE Callback for code base conversion. See CURLOPT_CONV_TO_NETWORK_FUNCTION

CURLOPT_COOKIE

Cookie(s) to send. See CURLOPT_COOKIE

CURLOPT_COOKIEFILE

File to read cookies from. See CURLOPT_COOKIEFILE

CURLOPT_COOKIEJAR

File to write cookies to. See CURLOPT_COOKIEJAR

CURLOPT_COOKIELIST

Add or control cookies. See CURLOPT_COOKIELIST

CURLOPT_COOKIESESSION

Start a new cookie session. See CURLOPT_COOKIESESSION

CURLOPT_COPYPOSTFIELDS

Send a POST with this data - and copy it. See CURLOPT_COPYPOSTFIELDS

CURLOPT_CRLF

Convert newlines. See CURLOPT_CRLF

CURLOPT_CRLFILE

Certificate Revocation List. See CURLOPT_CRLFILE

CURLOPT_CURLU

Set URL to work on with a URL handle. See CURLOPT_CURLU

CURLOPT_CUSTOMREQUEST

Custom request/method. See CURLOPT_CUSTOMREQUEST

CURLOPT_DEBUGDATA

Data pointer to pass to the debug callback. See CURLOPT_DEBUGDATA

CURLOPT_DEBUGFUNCTION

Callback for debug information. See CURLOPT_DEBUGFUNCTION

CURLOPT_DEFAULT_PROTOCOL

Default protocol. See CURLOPT_DEFAULT_PROTOCOL

CURLOPT_DIRLISTONLY

List only. See CURLOPT_DIRLISTONLY

CURLOPT_DISALLOW_USERNAME_IN_URL

Do not allow username in URL. See CURLOPT_DISALLOW_USERNAME_IN_URL

CURLOPT_DNS_CACHE_TIMEOUT

Timeout for DNS cache. See CURLOPT_DNS_CACHE_TIMEOUT

CURLOPT_DNS_INTERFACE

Bind name resolves to this interface. See CURLOPT_DNS_INTERFACE

CURLOPT_DNS_LOCAL_IP4

Bind name resolves to this IP4 address. See CURLOPT_DNS_LOCAL_IP4

CURLOPT_DNS_LOCAL_IP6

Bind name resolves to this IP6 address. See CURLOPT_DNS_LOCAL_IP6

CURLOPT_DNS_SERVERS

Preferred DNS servers. See CURLOPT_DNS_SERVERS

CURLOPT_DNS_SHUFFLE_ADDRESSES

Shuffle addresses before use. See CURLOPT_DNS_SHUFFLE_ADDRESSES

CURLOPT_DNS_USE_GLOBAL_CACHE

OBSOLETE Enable global DNS cache. See CURLOPT_DNS_USE_GLOBAL_CACHE

CURLOPT_DOH_SSL_VERIFYHOST

Verify the hostname in the DoH (DNS-over-HTTPS) SSL certificate. See CURLOPT_DOH_SSL_VERIFYHOST

CURLOPT_DOH_SSL_VERIFYPEER

Verify the DoH (DNS-over-HTTPS) SSL certificate. See CURLOPT_DOH_SSL_VERIFYPEER

CURLOPT_DOH_SSL_VERIFYSTATUS

Verify the DoH (DNS-over-HTTPS) SSL certificate's status. See CURLOPT_DOH_SSL_VERIFYSTATUS

CURLOPT_DOH_URL

Use this DoH server for name resolves. See CURLOPT_DOH_URL

CURLOPT_ECH

Set the configuration for ECH. See CURLOPT_ECH

CURLOPT_EGDSOCKET

OBSOLETE Identify EGD socket for entropy. See CURLOPT_EGDSOCKET

CURLOPT_ERRORBUFFER

Error message buffer. See CURLOPT_ERRORBUFFER

CURLOPT_EXPECT_100_TIMEOUT_MS

100-continue timeout. See CURLOPT_EXPECT_100_TIMEOUT_MS

CURLOPT_FAILONERROR

Fail on HTTP 4xx errors. CURLOPT_FAILONERROR

CURLOPT_FILETIME

Request file modification date and time. See CURLOPT_FILETIME

CURLOPT_FNMATCH_DATA

Data pointer to pass to the wildcard matching callback. See CURLOPT_FNMATCH_DATA

CURLOPT_FNMATCH_FUNCTION

Callback for wildcard matching. See CURLOPT_FNMATCH_FUNCTION

CURLOPT_FOLLOWLOCATION

Follow HTTP redirects. See CURLOPT_FOLLOWLOCATION

CURLOPT_FORBID_REUSE

Prevent subsequent connections from reusing this. See CURLOPT_FORBID_REUSE

CURLOPT_FRESH_CONNECT

Use a new connection. CURLOPT_FRESH_CONNECT

CURLOPT_FTPPORT

Use active FTP. See CURLOPT_FTPPORT

CURLOPT_FTPSSLAUTH

Control how to do TLS. See CURLOPT_FTPSSLAUTH

CURLOPT_FTP_ACCOUNT

Send ACCT command. See CURLOPT_FTP_ACCOUNT

CURLOPT_FTP_ALTERNATIVE_TO_USER

Alternative to USER. See CURLOPT_FTP_ALTERNATIVE_TO_USER

CURLOPT_FTP_CREATE_MISSING_DIRS

Create missing directories on the remote server. See CURLOPT_FTP_CREATE_MISSING_DIRS

CURLOPT_FTP_FILEMETHOD

Specify how to reach files. See CURLOPT_FTP_FILEMETHOD

CURLOPT_FTP_SKIP_PASV_IP

Ignore the IP address in the PASV response. See CURLOPT_FTP_SKIP_PASV_IP

CURLOPT_FTP_SSL_CCC

Back to non-TLS again after authentication. See CURLOPT_FTP_SSL_CCC

CURLOPT_FTP_USE_EPRT

Use EPRT. See CURLOPT_FTP_USE_EPRT

CURLOPT_FTP_USE_EPSV

Use EPSV. See CURLOPT_FTP_USE_EPSV

CURLOPT_FTP_USE_PRET

Use PRET. See CURLOPT_FTP_USE_PRET

CURLOPT_GSSAPI_DELEGATION

Disable GSS-API delegation. See CURLOPT_GSSAPI_DELEGATION

CURLOPT_HAPPY_EYEBALLS_TIMEOUT_MS

Timeout for happy eyeballs. See CURLOPT_HAPPY_EYEBALLS_TIMEOUT_MS

CURLOPT_HAPROXYPROTOCOL

Send an HAProxy PROXY protocol v1 header. See CURLOPT_HAPROXYPROTOCOL

CURLOPT_HAPROXY_CLIENT_IP

Spoof the client IP in an HAProxy PROXY protocol v1 header. See CURLOPT_HAPROXY_CLIENT_IP

CURLOPT_HEADER

Include the header in the body output. See CURLOPT_HEADER

CURLOPT_HEADERDATA

Data pointer to pass to the header callback. See CURLOPT_HEADERDATA

CURLOPT_HEADERFUNCTION

Callback for writing received headers. See CURLOPT_HEADERFUNCTION

CURLOPT_HEADEROPT

Control custom headers. See CURLOPT_HEADEROPT

CURLOPT_HSTS

Set HSTS cache file. See CURLOPT_HSTS

CURLOPT_HSTSREADDATA

Pass pointer to the HSTS read callback. See CURLOPT_HSTSREADDATA

CURLOPT_HSTSREADFUNCTION

Set HSTS read callback. See CURLOPT_HSTSREADFUNCTION

CURLOPT_HSTSWRITEDATA

Pass pointer to the HSTS write callback. See CURLOPT_HSTSWRITEDATA

CURLOPT_HSTSWRITEFUNCTION

Set HSTS write callback. See CURLOPT_HSTSWRITEFUNCTION

CURLOPT_HSTS_CTRL

Enable HSTS. See CURLOPT_HSTS_CTRL

CURLOPT_HTTP09_ALLOWED

Allow HTTP/0.9 responses. CURLOPT_HTTP09_ALLOWED

CURLOPT_HTTP200ALIASES

Alternative versions of 200 OK. See CURLOPT_HTTP200ALIASES

CURLOPT_HTTPAUTH

HTTP server authentication methods. See CURLOPT_HTTPAUTH

CURLOPT_HTTPGET

Do an HTTP GET request. See CURLOPT_HTTPGET

CURLOPT_HTTPHEADER

Custom HTTP headers. See CURLOPT_HTTPHEADER

CURLOPT_HTTPPOST

Deprecated option Multipart formpost HTTP POST. See CURLOPT_HTTPPOST

CURLOPT_HTTPPROXYTUNNEL

Tunnel through the HTTP proxy. CURLOPT_HTTPPROXYTUNNEL

CURLOPT_HTTP_CONTENT_DECODING

Disable Content decoding. See CURLOPT_HTTP_CONTENT_DECODING

CURLOPT_HTTP_TRANSFER_DECODING

Disable Transfer decoding. See CURLOPT_HTTP_TRANSFER_DECODING

CURLOPT_HTTP_VERSION

HTTP version to use. CURLOPT_HTTP_VERSION

CURLOPT_IGNORE_CONTENT_LENGTH

Ignore Content-Length. See CURLOPT_IGNORE_CONTENT_LENGTH

CURLOPT_INFILESIZE

Size of file to send. CURLOPT_INFILESIZE

CURLOPT_INFILESIZE_LARGE

Size of file to send. CURLOPT_INFILESIZE_LARGE

CURLOPT_INTERFACE

Bind connection locally to this. See CURLOPT_INTERFACE

CURLOPT_INTERLEAVEDATA

Data pointer to pass to the RTSP interleave callback. See CURLOPT_INTERLEAVEDATA

CURLOPT_INTERLEAVEFUNCTION

Callback for RTSP interleaved data. See CURLOPT_INTERLEAVEFUNCTION

CURLOPT_IOCTLDATA

Deprecated option Data pointer to pass to the I/O callback. See CURLOPT_IOCTLDATA

CURLOPT_IOCTLFUNCTION

Deprecated option Callback for I/O operations. See CURLOPT_IOCTLFUNCTION

CURLOPT_IPRESOLVE

IP version to use. See CURLOPT_IPRESOLVE

CURLOPT_ISSUERCERT

Issuer certificate. See CURLOPT_ISSUERCERT

CURLOPT_ISSUERCERT_BLOB

Issuer certificate memory buffer. See CURLOPT_ISSUERCERT_BLOB

CURLOPT_KEEP_SENDING_ON_ERROR

Keep sending on HTTP >= 300 errors. CURLOPT_KEEP_SENDING_ON_ERROR

CURLOPT_KEYPASSWD

Client key password. See CURLOPT_KEYPASSWD

CURLOPT_KRBLEVEL

Kerberos security level. See CURLOPT_KRBLEVEL

CURLOPT_LOCALPORT

Bind connection locally to this port. See CURLOPT_LOCALPORT

CURLOPT_LOCALPORTRANGE

Bind connection locally to port range. See CURLOPT_LOCALPORTRANGE

CURLOPT_LOGIN_OPTIONS

CURLOPT_LOW_SPEED_LIMIT

Low speed limit to abort transfer. See CURLOPT_LOW_SPEED_LIMIT

CURLOPT_LOW_SPEED_TIME

Time to be below the speed to trigger low speed abort. See CURLOPT_LOW_SPEED_TIME

CURLOPT_MAIL_AUTH

Authentication address. See CURLOPT_MAIL_AUTH

CURLOPT_MAIL_FROM

Address of the sender. See CURLOPT_MAIL_FROM

CURLOPT_MAIL_RCPT

Address of the recipients. See CURLOPT_MAIL_RCPT

CURLOPT_MAIL_RCPT_ALLOWFAILS

Allow RCPT TO command to fail for some recipients. See CURLOPT_MAIL_RCPT_ALLOWFAILS

CURLOPT_MAXAGE_CONN

Limit the age (idle time) of connections for reuse. See CURLOPT_MAXAGE_CONN

CURLOPT_MAXCONNECTS

Maximum number of connections in the connection pool. See CURLOPT_MAXCONNECTS

CURLOPT_MAXFILESIZE

Maximum file size to get. See CURLOPT_MAXFILESIZE

CURLOPT_MAXFILESIZE_LARGE

Maximum file size to get. See CURLOPT_MAXFILESIZE_LARGE

CURLOPT_MAXLIFETIME_CONN

Limit the age (since creation) of connections for reuse. See CURLOPT_MAXLIFETIME_CONN

CURLOPT_MAXREDIRS

Maximum number of redirects to follow. See CURLOPT_MAXREDIRS

CURLOPT_MAX_RECV_SPEED_LARGE

Cap the download speed to this. See CURLOPT_MAX_RECV_SPEED_LARGE

CURLOPT_MAX_SEND_SPEED_LARGE

Cap the upload speed to this. See CURLOPT_MAX_SEND_SPEED_LARGE

CURLOPT_MIMEPOST

Post/send MIME data. See CURLOPT_MIMEPOST

CURLOPT_MIME_OPTIONS

Set MIME option flags. See CURLOPT_MIME_OPTIONS

CURLOPT_NETRC

Enable .netrc parsing. See CURLOPT_NETRC

CURLOPT_NETRC_FILE

.netrc filename. See CURLOPT_NETRC_FILE

CURLOPT_NEW_DIRECTORY_PERMS

Mode for creating new remote directories. See CURLOPT_NEW_DIRECTORY_PERMS

CURLOPT_NEW_FILE_PERMS

Mode for creating new remote files. See CURLOPT_NEW_FILE_PERMS

CURLOPT_NOBODY

Do not get the body contents. See CURLOPT_NOBODY

CURLOPT_NOPROGRESS

Shut off the progress meter. See CURLOPT_NOPROGRESS

CURLOPT_NOPROXY

Filter out hosts from proxy use. CURLOPT_NOPROXY

CURLOPT_NOSIGNAL

Do not install signal handlers. See CURLOPT_NOSIGNAL

CURLOPT_OPENSOCKETDATA

Data pointer to pass to the open socket callback. See CURLOPT_OPENSOCKETDATA

CURLOPT_OPENSOCKETFUNCTION

Callback for socket creation. See CURLOPT_OPENSOCKETFUNCTION

CURLOPT_PASSWORD

Password. See CURLOPT_PASSWORD

CURLOPT_PATH_AS_IS

Disable squashing /../ and /./ sequences in the path. See CURLOPT_PATH_AS_IS

CURLOPT_PINNEDPUBLICKEY

Set pinned SSL public key . See CURLOPT_PINNEDPUBLICKEY

CURLOPT_PIPEWAIT

Wait on connection to pipeline on it. See CURLOPT_PIPEWAIT

CURLOPT_PORT

Port number to connect to. See CURLOPT_PORT

CURLOPT_POST

Make an HTTP POST. See CURLOPT_POST

CURLOPT_POSTFIELDSIZE

The POST data is this big. See CURLOPT_POSTFIELDSIZE

CURLOPT_POSTFIELDSIZE_LARGE

The POST data is this big. See CURLOPT_POSTFIELDSIZE_LARGE

CURLOPT_POSTQUOTE

Commands to run after transfer. See CURLOPT_POSTQUOTE

CURLOPT_POSTREDIR

How to act on redirects after POST. See CURLOPT_POSTREDIR

CURLOPT_PREQUOTE

Commands to run just before transfer. See CURLOPT_PREQUOTE

CURLOPT_PREREQDATA

Data pointer to pass to the CURLOPT_PREREQFUNCTION callback. See CURLOPT_PREREQDATA

CURLOPT_PREREQFUNCTION

Callback to be called after a connection is established but before a request is made on that connection. See CURLOPT_PREREQFUNCTION

CURLOPT_PRE_PROXY

Socks proxy to use. See CURLOPT_PRE_PROXY

CURLOPT_PRIVATE

Private pointer to store. See CURLOPT_PRIVATE

CURLOPT_PROGRESSDATA

Data pointer to pass to the progress meter callback. See CURLOPT_PROGRESSDATA

CURLOPT_PROGRESSFUNCTION

OBSOLETE callback for progress meter. See CURLOPT_PROGRESSFUNCTION

CURLOPT_PROTOCOLS

Deprecated option Allowed protocols. See CURLOPT_PROTOCOLS

CURLOPT_PROTOCOLS_STR

Allowed protocols. See CURLOPT_PROTOCOLS_STR

CURLOPT_PROXY

Proxy to use. See CURLOPT_PROXY

CURLOPT_PROXYAUTH

HTTP proxy authentication methods. See CURLOPT_PROXYAUTH

CURLOPT_PROXYHEADER

Custom HTTP headers sent to proxy. See CURLOPT_PROXYHEADER

CURLOPT_PROXYPASSWORD

Proxy password. See CURLOPT_PROXYPASSWORD

CURLOPT_PROXYPORT

Proxy port to use. See CURLOPT_PROXYPORT

CURLOPT_PROXYTYPE

Proxy type. See CURLOPT_PROXYTYPE

CURLOPT_PROXYUSERNAME

Proxy username. See CURLOPT_PROXYUSERNAME

CURLOPT_PROXYUSERPWD

Proxy username and password. See CURLOPT_PROXYUSERPWD

CURLOPT_PROXY_CAINFO

Proxy CA cert bundle. See CURLOPT_PROXY_CAINFO

CURLOPT_PROXY_CAINFO_BLOB

Proxy CA cert bundle memory buffer. See CURLOPT_PROXY_CAINFO_BLOB

CURLOPT_PROXY_CAPATH

Path to proxy CA cert bundle. See CURLOPT_PROXY_CAPATH

CURLOPT_PROXY_CRLFILE

Proxy Certificate Revocation List. See CURLOPT_PROXY_CRLFILE

CURLOPT_PROXY_ISSUERCERT

Proxy issuer certificate. See CURLOPT_PROXY_ISSUERCERT

CURLOPT_PROXY_ISSUERCERT_BLOB

Proxy issuer certificate memory buffer. See CURLOPT_PROXY_ISSUERCERT_BLOB

CURLOPT_PROXY_KEYPASSWD

Proxy client key password. See CURLOPT_PROXY_KEYPASSWD

CURLOPT_PROXY_PINNEDPUBLICKEY

Set the proxy's pinned SSL public key. See CURLOPT_PROXY_PINNEDPUBLICKEY

CURLOPT_PROXY_SERVICE_NAME

Proxy authentication service name. CURLOPT_PROXY_SERVICE_NAME

CURLOPT_PROXY_SSLCERT

Proxy client cert. See CURLOPT_PROXY_SSLCERT

CURLOPT_PROXY_SSLCERTTYPE

Proxy client cert type. See CURLOPT_PROXY_SSLCERTTYPE

CURLOPT_PROXY_SSLCERT_BLOB

Proxy client cert memory buffer. See CURLOPT_PROXY_SSLCERT_BLOB

CURLOPT_PROXY_SSLKEY

Proxy client key. See CURLOPT_PROXY_SSLKEY

CURLOPT_PROXY_SSLKEYTYPE

Proxy client key type. See CURLOPT_PROXY_SSLKEYTYPE

CURLOPT_PROXY_SSLKEY_BLOB

Proxy client key. See CURLOPT_PROXY_SSLKEY_BLOB

CURLOPT_PROXY_SSLVERSION

Proxy SSL version to use. See CURLOPT_PROXY_SSLVERSION

CURLOPT_PROXY_SSL_CIPHER_LIST

Proxy ciphers to use. See CURLOPT_PROXY_SSL_CIPHER_LIST

CURLOPT_PROXY_SSL_OPTIONS

Control proxy SSL behavior. See CURLOPT_PROXY_SSL_OPTIONS

CURLOPT_PROXY_SSL_VERIFYHOST

Verify the hostname in the proxy SSL certificate. See CURLOPT_PROXY_SSL_VERIFYHOST

CURLOPT_PROXY_SSL_VERIFYPEER

Verify the proxy SSL certificate. See CURLOPT_PROXY_SSL_VERIFYPEER

CURLOPT_PROXY_TLS13_CIPHERS

Proxy TLS 1.3 cipher suites to use. See CURLOPT_PROXY_TLS13_CIPHERS

CURLOPT_PROXY_TLSAUTH_PASSWORD

Proxy TLS authentication password. See CURLOPT_PROXY_TLSAUTH_PASSWORD

CURLOPT_PROXY_TLSAUTH_TYPE

Proxy TLS authentication methods. See CURLOPT_PROXY_TLSAUTH_TYPE

CURLOPT_PROXY_TLSAUTH_USERNAME

Proxy TLS authentication username. See CURLOPT_PROXY_TLSAUTH_USERNAME

CURLOPT_PROXY_TRANSFER_MODE

Add transfer mode to URL over proxy. See CURLOPT_PROXY_TRANSFER_MODE

CURLOPT_PUT

Deprecated option Issue an HTTP PUT request. See CURLOPT_PUT

CURLOPT_QUICK_EXIT

To be set by toplevel tools like "curl" to skip lengthy cleanups when they are about to call exit() anyway. See CURLOPT_QUICK_EXIT

CURLOPT_QUOTE

Commands to run before transfer. See CURLOPT_QUOTE

CURLOPT_RANDOM_FILE

OBSOLETE Provide source for entropy random data. See CURLOPT_RANDOM_FILE

CURLOPT_RANGE

Range requests. See CURLOPT_RANGE

CURLOPT_READDATA

Data pointer to pass to the read callback. See CURLOPT_READDATA

CURLOPT_READFUNCTION

Callback for reading data. See CURLOPT_READFUNCTION

CURLOPT_REDIR_PROTOCOLS

Deprecated option Protocols to allow redirects to. See CURLOPT_REDIR_PROTOCOLS

CURLOPT_REDIR_PROTOCOLS_STR

Protocols to allow redirects to. See CURLOPT_REDIR_PROTOCOLS_STR

CURLOPT_REFERER

Referer: header. See CURLOPT_REFERER

CURLOPT_REQUEST_TARGET

Set the request target. CURLOPT_REQUEST_TARGET

CURLOPT_RESOLVE

Provide fixed/fake name resolves. See CURLOPT_RESOLVE

CURLOPT_RESOLVER_START_DATA

Data pointer to pass to resolver start callback. See CURLOPT_RESOLVER_START_DATA

CURLOPT_RESOLVER_START_FUNCTION

Callback to be called before a new resolve request is started. See CURLOPT_RESOLVER_START_FUNCTION

CURLOPT_RESUME_FROM

Resume a transfer. See CURLOPT_RESUME_FROM

CURLOPT_RESUME_FROM_LARGE

Resume a transfer. See CURLOPT_RESUME_FROM_LARGE

CURLOPT_RTSP_CLIENT_CSEQ

Client CSEQ number. See CURLOPT_RTSP_CLIENT_CSEQ

CURLOPT_RTSP_REQUEST

RTSP request. See CURLOPT_RTSP_REQUEST

CURLOPT_RTSP_SERVER_CSEQ

CSEQ number for RTSP Server->Client request. See CURLOPT_RTSP_SERVER_CSEQ

CURLOPT_RTSP_SESSION_ID

RTSP session-id. See CURLOPT_RTSP_SESSION_ID

CURLOPT_RTSP_STREAM_URI

RTSP stream URI. See CURLOPT_RTSP_STREAM_URI

CURLOPT_RTSP_TRANSPORT

RTSP Transport: header. See CURLOPT_RTSP_TRANSPORT

CURLOPT_SASL_AUTHZID

SASL authorization identity (identity to act as). See CURLOPT_SASL_AUTHZID

CURLOPT_SASL_IR

Enable SASL initial response. See CURLOPT_SASL_IR

CURLOPT_SEEKDATA

Data pointer to pass to the seek callback. See CURLOPT_SEEKDATA

CURLOPT_SEEKFUNCTION

Callback for seek operations. See CURLOPT_SEEKFUNCTION

CURLOPT_SERVER_RESPONSE_TIMEOUT

Timeout for server responses. See CURLOPT_SERVER_RESPONSE_TIMEOUT

CURLOPT_SERVER_RESPONSE_TIMEOUT_MS

Timeout for server responses. See CURLOPT_SERVER_RESPONSE_TIMEOUT_MS

CURLOPT_SERVICE_NAME

Authentication service name. CURLOPT_SERVICE_NAME

CURLOPT_SHARE

Share object to use. See CURLOPT_SHARE

CURLOPT_SOCKOPTDATA

Data pointer to pass to the sockopt callback. See CURLOPT_SOCKOPTDATA

CURLOPT_SOCKOPTFUNCTION

Callback for sockopt operations. See CURLOPT_SOCKOPTFUNCTION

CURLOPT_SOCKS5_AUTH

Socks5 authentication methods. See CURLOPT_SOCKS5_AUTH

CURLOPT_SOCKS5_GSSAPI_NEC

Socks5 GSSAPI NEC mode. See CURLOPT_SOCKS5_GSSAPI_NEC

CURLOPT_SOCKS5_GSSAPI_SERVICE

Deprecated option Socks5 GSSAPI service name. See CURLOPT_SOCKS5_GSSAPI_SERVICE

CURLOPT_SSH_AUTH_TYPES

SSH authentication types. See CURLOPT_SSH_AUTH_TYPES

CURLOPT_SSH_COMPRESSION

Enable SSH compression. See CURLOPT_SSH_COMPRESSION

CURLOPT_SSH_HOSTKEYDATA

Custom pointer to pass to ssh host key callback. See CURLOPT_SSH_HOSTKEYDATA

CURLOPT_SSH_HOSTKEYFUNCTION

Callback for checking host key handling. See CURLOPT_SSH_HOSTKEYFUNCTION

CURLOPT_SSH_HOST_PUBLIC_KEY_MD5

MD5 of host's public key. See CURLOPT_SSH_HOST_PUBLIC_KEY_MD5

CURLOPT_SSH_HOST_PUBLIC_KEY_SHA256

SHA256 of host's public key. See CURLOPT_SSH_HOST_PUBLIC_KEY_SHA256

CURLOPT_SSH_KEYDATA

Custom pointer to pass to ssh key callback. See CURLOPT_SSH_KEYDATA

CURLOPT_SSH_KEYFUNCTION

Callback for known hosts handling. See CURLOPT_SSH_KEYFUNCTION

CURLOPT_SSH_KNOWNHOSTS

Filename with known hosts. See CURLOPT_SSH_KNOWNHOSTS

CURLOPT_SSH_PRIVATE_KEYFILE

Filename of the private key. See CURLOPT_SSH_PRIVATE_KEYFILE

CURLOPT_SSH_PUBLIC_KEYFILE

Filename of the public key. See CURLOPT_SSH_PUBLIC_KEYFILE

CURLOPT_SSLCERT

Client cert. See CURLOPT_SSLCERT

CURLOPT_SSLCERTTYPE

Client cert type. See CURLOPT_SSLCERTTYPE

CURLOPT_SSLCERT_BLOB

Client cert memory buffer. See CURLOPT_SSLCERT_BLOB

CURLOPT_SSLENGINE

Use identifier with SSL engine. See CURLOPT_SSLENGINE

CURLOPT_SSLENGINE_DEFAULT

Default SSL engine. See CURLOPT_SSLENGINE_DEFAULT

CURLOPT_SSLKEY

Client key. See CURLOPT_SSLKEY

CURLOPT_SSLKEYTYPE

Client key type. See CURLOPT_SSLKEYTYPE

CURLOPT_SSLKEY_BLOB

Client key memory buffer. See CURLOPT_SSLKEY_BLOB

CURLOPT_SSLVERSION

SSL version to use. See CURLOPT_SSLVERSION

CURLOPT_SSL_CIPHER_LIST

Ciphers to use. See CURLOPT_SSL_CIPHER_LIST

CURLOPT_SSL_CTX_DATA

Data pointer to pass to the SSL context callback. See CURLOPT_SSL_CTX_DATA

CURLOPT_SSL_CTX_FUNCTION

Callback for SSL context logic. See CURLOPT_SSL_CTX_FUNCTION

CURLOPT_SSL_EC_CURVES

Set key exchange curves. See CURLOPT_SSL_EC_CURVES

CURLOPT_SSL_ENABLE_ALPN

Enable use of ALPN. See CURLOPT_SSL_ENABLE_ALPN

CURLOPT_SSL_ENABLE_NPN

OBSOLETE Enable use of NPN. See CURLOPT_SSL_ENABLE_NPN

CURLOPT_SSL_FALSESTART

Enable TLS False Start. See CURLOPT_SSL_FALSESTART

CURLOPT_SSL_OPTIONS

Control SSL behavior. See CURLOPT_SSL_OPTIONS

CURLOPT_SSL_SESSIONID_CACHE

Disable SSL session-id cache. See CURLOPT_SSL_SESSIONID_CACHE

CURLOPT_SSL_VERIFYHOST

Verify the hostname in the SSL certificate. See CURLOPT_SSL_VERIFYHOST

CURLOPT_SSL_VERIFYPEER

Verify the SSL certificate. See CURLOPT_SSL_VERIFYPEER

CURLOPT_SSL_VERIFYSTATUS

Verify the SSL certificate's status. See CURLOPT_SSL_VERIFYSTATUS

CURLOPT_STDERR

Redirect stderr to another stream. See CURLOPT_STDERR

CURLOPT_STREAM_DEPENDS

This HTTP/2 stream depends on another. See CURLOPT_STREAM_DEPENDS

CURLOPT_STREAM_DEPENDS_E

This HTTP/2 stream depends on another exclusively. See CURLOPT_STREAM_DEPENDS_E

CURLOPT_STREAM_WEIGHT

Set this HTTP/2 stream's weight. See CURLOPT_STREAM_WEIGHT

CURLOPT_SUPPRESS_CONNECT_HEADERS

Suppress proxy CONNECT response headers from user callbacks. See CURLOPT_SUPPRESS_CONNECT_HEADERS

CURLOPT_TCP_FASTOPEN

Enable TCP Fast Open. See CURLOPT_TCP_FASTOPEN

CURLOPT_TCP_KEEPALIVE

Enable TCP keep-alive. See CURLOPT_TCP_KEEPALIVE

CURLOPT_TCP_KEEPCNT

Maximum number of keep-alive probes. See CURLOPT_TCP_KEEPCNT

CURLOPT_TCP_KEEPIDLE

Idle time before sending keep-alive. See CURLOPT_TCP_KEEPIDLE

CURLOPT_TCP_KEEPINTVL

Interval between keep-alive probes. See CURLOPT_TCP_KEEPINTVL

CURLOPT_TCP_NODELAY

Disable the Nagle algorithm. See CURLOPT_TCP_NODELAY

CURLOPT_TELNETOPTIONS

TELNET options. See CURLOPT_TELNETOPTIONS

CURLOPT_TFTP_BLKSIZE

TFTP block size. See CURLOPT_TFTP_BLKSIZE

CURLOPT_TFTP_NO_OPTIONS

Do not send TFTP options requests. See CURLOPT_TFTP_NO_OPTIONS

CURLOPT_TIMECONDITION

Make a time conditional request. See CURLOPT_TIMECONDITION

CURLOPT_TIMEOUT

Timeout for the entire request. See CURLOPT_TIMEOUT

CURLOPT_TIMEOUT_MS

Millisecond timeout for the entire request. See CURLOPT_TIMEOUT_MS

CURLOPT_TIMEVALUE

Time value for the time conditional request. See CURLOPT_TIMEVALUE

CURLOPT_TIMEVALUE_LARGE

Time value for the time conditional request. See CURLOPT_TIMEVALUE_LARGE

CURLOPT_TLS13_CIPHERS

TLS 1.3 cipher suites to use. See CURLOPT_TLS13_CIPHERS

CURLOPT_TLSAUTH_PASSWORD

TLS authentication password. See CURLOPT_TLSAUTH_PASSWORD

CURLOPT_TLSAUTH_TYPE

TLS authentication methods. See CURLOPT_TLSAUTH_TYPE

CURLOPT_TLSAUTH_USERNAME

TLS authentication username. See CURLOPT_TLSAUTH_USERNAME

CURLOPT_TRAILERDATA

Custom pointer passed to the trailing headers callback. See CURLOPT_TRAILERDATA

CURLOPT_TRAILERFUNCTION

Set callback for sending trailing headers. See CURLOPT_TRAILERFUNCTION

CURLOPT_TRANSFERTEXT

Use text transfer. See CURLOPT_TRANSFERTEXT

CURLOPT_TRANSFER_ENCODING

Request Transfer-Encoding. See CURLOPT_TRANSFER_ENCODING

CURLOPT_UNIX_SOCKET_PATH

Path to a Unix domain socket. See CURLOPT_UNIX_SOCKET_PATH

CURLOPT_UNRESTRICTED_AUTH

Do not restrict authentication to original host. CURLOPT_UNRESTRICTED_AUTH

CURLOPT_UPKEEP_INTERVAL_MS

Sets the interval at which connection upkeep are performed. See CURLOPT_UPKEEP_INTERVAL_MS

CURLOPT_UPLOAD

Upload data. See CURLOPT_UPLOAD

CURLOPT_UPLOAD_BUFFERSIZE

Set upload buffer size. See CURLOPT_UPLOAD_BUFFERSIZE

CURLOPT_URL

URL to work on. See CURLOPT_URL

CURLOPT_USERAGENT

User-Agent: header. See CURLOPT_USERAGENT

CURLOPT_USERNAME

Username. See CURLOPT_USERNAME

CURLOPT_USERPWD

Username and password. See CURLOPT_USERPWD

CURLOPT_USE_SSL

Use TLS/SSL. See CURLOPT_USE_SSL

CURLOPT_VERBOSE

Display verbose information. See CURLOPT_VERBOSE

CURLOPT_WILDCARDMATCH

Transfer multiple files according to a filename pattern. See CURLOPT_WILDCARDMATCH

CURLOPT_WRITEDATA

Data pointer to pass to the write callback. See CURLOPT_WRITEDATA

CURLOPT_WRITEFUNCTION

Callback for writing data. See CURLOPT_WRITEFUNCTION

CURLOPT_WS_OPTIONS

Set WebSocket options. See CURLOPT_WS_OPTIONS

CURLOPT_XFERINFODATA

Data pointer to pass to the progress meter callback. See CURLOPT_XFERINFODATA

CURLOPT_XFERINFOFUNCTION

Callback for progress meter. See CURLOPT_XFERINFOFUNCTION

CURLOPT_XOAUTH2_BEARER

OAuth2 bearer token. See CURLOPT_XOAUTH2_BEARER

Protocols

This functionality affects all supported protocols

Example

int main(void) { CURL *curl = curl_easy_init(); if(curl) { CURLcode res; curl_easy_setopt(curl, CURLOPT_URL, "https://example.com"); res = curl_easy_perform(curl); curl_easy_cleanup(curl); } }

Availability

Added in curl 7.1

Return value

CURLE_OK (zero) means that the option was set properly, non-zero means an error occurred as <curl/curl.h> defines. See the libcurl-errors man page for the full list with descriptions.

Strings passed on to libcurl must be shorter than 8000000 bytes, otherwise curl_easy_setopt returns CURLE_BAD_FUNCTION_ARGUMENT (added in 7.65.0).

CURLE_BAD_FUNCTION_ARGUMENT is returned when the argument to an option is invalid, like perhaps out of range.

If you try to set an option that libcurl does not know about, perhaps because the library is too old to support it or the option was removed in a recent version, this function returns CURLE_UNKNOWN_OPTION. If support for the option was disabled at compile-time, it returns CURLE_NOT_BUILT_IN.

libcurl - curl_easy_setopt() (original) (raw)

curl_easy_setopt - set options for a curl easy handle

Name

Synopsis

Description

Options

Protocols

Example

Availability

Return value

See also