curl_version() shows the versions of libcurl, libssl and zlib and
supported protocols. curl_options() lists all options available in
the current version of libcurl. The dataset curl_symbols lists all
symbols (including options) provides more information about the symbols,
including when support was added/removed from libcurl.
curl_options(filter = "")
curl_symbols(filter = "")
curl_version()# Available options
curl_options()
#> abstract_unix_socket accepttimeout_ms
#> 10264 212
#> accept_encoding address_scope
#> 10102 171
#> altsvc altsvc_ctrl
#> 10287 286
#> append autoreferer
#> 50 58
#> aws_sigv4 buffersize
#> 10305 98
#> cainfo cainfo_blob
#> 10065 40309
#> capath certinfo
#> 10097 172
#> chunk_bgn_function chunk_data
#> 20198 10201
#> chunk_end_function closesocketdata
#> 20199 10209
#> closesocketfunction connecttimeout
#> 20208 78
#> connecttimeout_ms connect_only
#> 156 141
#> connect_to conv_from_network_function
#> 10243 20142
#> conv_from_utf8_function conv_to_network_function
#> 20144 20143
#> cookie cookiefile
#> 10022 10031
#> cookiejar cookielist
#> 10082 10135
#> cookiesession copypostfields
#> 96 10165
#> crlf crlfile
#> 27 10169
#> curlu customrequest
#> 10282 10036
#> debugdata debugfunction
#> 10095 20094
#> default_protocol dirlistonly
#> 10238 48
#> disallow_username_in_url dns_cache_timeout
#> 278 92
#> dns_interface dns_local_ip4
#> 10221 10222
#> dns_local_ip6 dns_servers
#> 10223 10211
#> dns_shuffle_addresses dns_use_global_cache
#> 275 91
#> doh_ssl_verifyhost doh_ssl_verifypeer
#> 307 306
#> doh_ssl_verifystatus doh_url
#> 308 10279
#> egdsocket errorbuffer
#> 10077 10010
#> expect_100_timeout_ms failonerror
#> 227 45
#> filetime fnmatch_data
#> 69 10202
#> fnmatch_function followlocation
#> 20200 52
#> forbid_reuse fresh_connect
#> 75 74
#> ftpport ftpsslauth
#> 10017 129
#> ftp_account ftp_alternative_to_user
#> 10134 10147
#> ftp_create_missing_dirs ftp_filemethod
#> 110 138
#> ftp_response_timeout ftp_skip_pasv_ip
#> 112 137
#> ftp_ssl_ccc ftp_use_eprt
#> 154 106
#> ftp_use_epsv ftp_use_pret
#> 85 188
#> gssapi_delegation happy_eyeballs_timeout_ms
#> 210 271
#> haproxyprotocol header
#> 274 42
#> headerdata headerfunction
#> 10029 20079
#> headeropt hsts
#> 229 10300
#> hstsreaddata hstsreadfunction
#> 10302 20301
#> hstswritedata hstswritefunction
#> 10304 20303
#> hsts_ctrl http09_allowed
#> 299 285
#> http200aliases httpauth
#> 10104 107
#> httpget httpheader
#> 80 10023
#> httppost httpproxytunnel
#> 10024 61
#> http_content_decoding http_transfer_decoding
#> 158 157
#> http_version ignore_content_length
#> 84 136
#> infilesize infilesize_large
#> 14 30115
#> interface interleavedata
#> 10062 10195
#> interleavefunction ioctldata
#> 20196 10131
#> ioctlfunction ipresolve
#> 20130 113
#> issuercert issuercert_blob
#> 10170 40295
#> keep_sending_on_error keypasswd
#> 245 10026
#> krblevel localport
#> 10063 139
#> localportrange login_options
#> 140 10224
#> low_speed_limit low_speed_time
#> 19 20
#> mail_auth mail_from
#> 10217 10186
#> mail_rcpt mail_rcpt_alllowfails
#> 10187 290
#> maxage_conn maxconnects
#> 288 71
#> maxfilesize maxfilesize_large
#> 114 30117
#> maxlifetime_conn maxredirs
#> 314 68
#> max_recv_speed_large max_send_speed_large
#> 30146 30145
#> mimepost mime_options
#> 10269 315
#> netrc netrc_file
#> 51 10118
#> new_directory_perms new_file_perms
#> 160 159
#> nobody noprogress
#> 44 43
#> noproxy nosignal
#> 10177 99
#> opensocketdata opensocketfunction
#> 10164 20163
#> password path_as_is
#> 10174 234
#> pinnedpublickey pipewait
#> 10230 237
#> port post
#> 3 47
#> postfields postfieldsize
#> 10015 60
#> postfieldsize_large postquote
#> 30120 10039
#> postredir prequote
#> 161 10093
#> prereqdata prereqfunction
#> 10313 20312
#> pre_proxy private
#> 10262 10103
#> progressfunction protocols
#> 20056 181
#> proxy proxyauth
#> 10004 111
#> proxyheader proxypassword
#> 10228 10176
#> proxyport proxytype
#> 59 101
#> proxyusername proxyuserpwd
#> 10175 10006
#> proxy_cainfo proxy_cainfo_blob
#> 10246 40310
#> proxy_capath proxy_crlfile
#> 10247 10260
#> proxy_issuercert proxy_issuercert_blob
#> 10296 40297
#> proxy_keypasswd proxy_pinnedpublickey
#> 10258 10263
#> proxy_service_name proxy_sslcert
#> 10235 10254
#> proxy_sslcerttype proxy_sslcert_blob
#> 10255 40293
#> proxy_sslkey proxy_sslkeytype
#> 10256 10257
#> proxy_sslkey_blob proxy_sslversion
#> 40294 250
#> proxy_ssl_cipher_list proxy_ssl_options
#> 10259 261
#> proxy_ssl_verifyhost proxy_ssl_verifypeer
#> 249 248
#> proxy_tls13_ciphers proxy_tlsauth_password
#> 10277 10252
#> proxy_tlsauth_type proxy_tlsauth_username
#> 10253 10251
#> proxy_transfer_mode put
#> 166 54
#> quote random_file
#> 10028 10076
#> range readdata
#> 10007 10009
#> readfunction redir_protocols
#> 20012 182
#> referer request_target
#> 10016 10266
#> resolve resolver_start_data
#> 10203 10273
#> resolver_start_function resume_from
#> 20272 21
#> resume_from_large rtsp_client_cseq
#> 30116 193
#> rtsp_request rtsp_server_cseq
#> 189 194
#> rtsp_session_id rtsp_stream_uri
#> 10190 10191
#> rtsp_transport sasl_authzid
#> 10192 10289
#> sasl_ir seekdata
#> 218 10168
#> seekfunction service_name
#> 20167 10236
#> share sockoptdata
#> 10100 10149
#> sockoptfunction socks5_auth
#> 20148 267
#> socks5_gssapi_nec socks5_gssapi_service
#> 180 10179
#> ssh_auth_types ssh_compression
#> 151 268
#> ssh_host_public_key_md5 ssh_host_public_key_sha256
#> 10162 10311
#> ssh_keydata ssh_keyfunction
#> 10185 20184
#> ssh_knownhosts ssh_private_keyfile
#> 10183 10153
#> ssh_public_keyfile sslcert
#> 10152 10025
#> sslcerttype sslcert_blob
#> 10086 40291
#> sslengine sslengine_default
#> 10089 90
#> sslkey sslkeytype
#> 10087 10088
#> sslkey_blob sslversion
#> 40292 32
#> ssl_cipher_list ssl_ctx_data
#> 10083 10109
#> ssl_ctx_function ssl_ec_curves
#> 20108 10298
#> ssl_enable_alpn ssl_enable_npn
#> 226 225
#> ssl_falsestart ssl_options
#> 233 216
#> ssl_sessionid_cache ssl_verifyhost
#> 150 81
#> ssl_verifypeer ssl_verifystatus
#> 64 232
#> stderr stream_depends
#> 10037 10240
#> stream_depends_e stream_weight
#> 10241 239
#> suppress_connect_headers tcp_fastopen
#> 265 244
#> tcp_keepalive tcp_keepidle
#> 213 214
#> tcp_keepintvl tcp_nodelay
#> 215 121
#> telnetoptions tftp_blksize
#> 10070 178
#> tftp_no_options timecondition
#> 242 33
#> timeout timeout_ms
#> 13 155
#> timevalue timevalue_large
#> 34 30270
#> tls13_ciphers tlsauth_password
#> 10276 10205
#> tlsauth_type tlsauth_username
#> 10206 10204
#> trailerdata trailerfunction
#> 10284 20283
#> transfertext transfer_encoding
#> 53 207
#> unix_socket_path unrestricted_auth
#> 10231 105
#> upkeep_interval_ms upload
#> 281 46
#> upload_buffersize url
#> 280 10002
#> useragent username
#> 10018 10173
#> userpwd use_ssl
#> 10005 119
#> verbose wildcardmatch
#> 41 197
#> writedata writefunction
#> 10001 20011
#> xferinfodata xferinfofunction
#> 10057 20219
#> xoauth2_bearer
#> 10220
# List proxy options
curl_options("proxy")
#> haproxyprotocol httpproxytunnel noproxy
#> 274 61 10177
#> pre_proxy proxy proxyauth
#> 10262 10004 111
#> proxyheader proxypassword proxyport
#> 10228 10176 59
#> proxytype proxyusername proxyuserpwd
#> 101 10175 10006
#> proxy_cainfo proxy_cainfo_blob proxy_capath
#> 10246 40310 10247
#> proxy_crlfile proxy_issuercert proxy_issuercert_blob
#> 10260 10296 40297
#> proxy_keypasswd proxy_pinnedpublickey proxy_service_name
#> 10258 10263 10235
#> proxy_sslcert proxy_sslcerttype proxy_sslcert_blob
#> 10254 10255 40293
#> proxy_sslkey proxy_sslkeytype proxy_sslkey_blob
#> 10256 10257 40294
#> proxy_sslversion proxy_ssl_cipher_list proxy_ssl_options
#> 250 10259 261
#> proxy_ssl_verifyhost proxy_ssl_verifypeer proxy_tls13_ciphers
#> 249 248 10277
#> proxy_tlsauth_password proxy_tlsauth_type proxy_tlsauth_username
#> 10252 10253 10251
#> proxy_transfer_mode
#> 166
# Symbol table
curl_symbols("proxy")
#> name introduced deprecated removed value
#> 157 CURL_VERSION_HTTPS_PROXY 7.52.0 <NA> <NA> 2097152
#> 221 CURLE_COULDNT_RESOLVE_PROXY 7.1 <NA> <NA> 5
#> 277 CURLE_PROXY 7.73.0 <NA> <NA> 97
#> 457 CURLINFO_PROXY_ERROR 7.73.0 <NA> <NA> 2097211
#> 458 CURLINFO_PROXY_SSL_VERIFYRESULT 7.52.0 <NA> <NA> 2097199
#> 459 CURLINFO_PROXYAUTH_AVAIL 7.10.8 <NA> <NA> 2097176
#> 498 CURLINFO_USED_PROXY 8.7.0 <NA> <NA> 2097218
#> 640 CURLOPT_HAPROXY_CLIENT_IP 8.2.0 <NA> <NA> 10323
#> 641 CURLOPT_HAPROXYPROTOCOL 7.60.0 <NA> <NA> 274
#> 661 CURLOPT_HTTPPROXYTUNNEL 7.3 <NA> <NA> 61
#> 706 CURLOPT_NOPROXY 7.19.4 <NA> <NA> 10177
#> 726 CURLOPT_PRE_PROXY 7.52.0 <NA> <NA> 10262
#> 735 CURLOPT_PROXY 7.1 <NA> <NA> 10004
#> 736 CURLOPT_PROXY_CAINFO 7.52.0 <NA> <NA> 10246
#> 737 CURLOPT_PROXY_CAINFO_BLOB 7.77.0 <NA> <NA> 40310
#> 738 CURLOPT_PROXY_CAPATH 7.52.0 <NA> <NA> 10247
#> 739 CURLOPT_PROXY_CRLFILE 7.52.0 <NA> <NA> 10260
#> 740 CURLOPT_PROXY_ISSUERCERT 7.71.0 <NA> <NA> 10296
#> 741 CURLOPT_PROXY_ISSUERCERT_BLOB 7.71.0 <NA> <NA> 40297
#> 742 CURLOPT_PROXY_KEYPASSWD 7.52.0 <NA> <NA> 10258
#> 743 CURLOPT_PROXY_PINNEDPUBLICKEY 7.52.0 <NA> <NA> 10263
#> 744 CURLOPT_PROXY_SERVICE_NAME 7.43.0 <NA> <NA> 10235
#> 745 CURLOPT_PROXY_SSL_CIPHER_LIST 7.52.0 <NA> <NA> 10259
#> 746 CURLOPT_PROXY_SSL_OPTIONS 7.52.0 <NA> <NA> 261
#> 747 CURLOPT_PROXY_SSL_VERIFYHOST 7.52.0 <NA> <NA> 249
#> 748 CURLOPT_PROXY_SSL_VERIFYPEER 7.52.0 <NA> <NA> 248
#> 749 CURLOPT_PROXY_SSLCERT 7.52.0 <NA> <NA> 10254
#> 750 CURLOPT_PROXY_SSLCERT_BLOB 7.71.0 <NA> <NA> 40293
#> 751 CURLOPT_PROXY_SSLCERTTYPE 7.52.0 <NA> <NA> 10255
#> 752 CURLOPT_PROXY_SSLKEY 7.52.0 <NA> <NA> 10256
#> 753 CURLOPT_PROXY_SSLKEY_BLOB 7.71.0 <NA> <NA> 40294
#> 754 CURLOPT_PROXY_SSLKEYTYPE 7.52.0 <NA> <NA> 10257
#> 755 CURLOPT_PROXY_SSLVERSION 7.52.0 <NA> <NA> 250
#> 756 CURLOPT_PROXY_TLS13_CIPHERS 7.61.0 <NA> <NA> 10277
#> 757 CURLOPT_PROXY_TLSAUTH_PASSWORD 7.52.0 <NA> <NA> 10252
#> 758 CURLOPT_PROXY_TLSAUTH_TYPE 7.52.0 <NA> <NA> 10253
#> 759 CURLOPT_PROXY_TLSAUTH_USERNAME 7.52.0 <NA> <NA> 10251
#> 760 CURLOPT_PROXY_TRANSFER_MODE 7.18.0 <NA> <NA> 166
#> 761 CURLOPT_PROXYAUTH 7.10.7 <NA> <NA> 111
#> 762 CURLOPT_PROXYHEADER 7.37.0 <NA> <NA> 10228
#> 763 CURLOPT_PROXYPASSWORD 7.19.1 <NA> <NA> 10176
#> 764 CURLOPT_PROXYPORT 7.1 <NA> <NA> 59
#> 765 CURLOPT_PROXYTYPE 7.10 <NA> <NA> 101
#> 766 CURLOPT_PROXYUSERNAME 7.19.1 <NA> <NA> 10175
#> 767 CURLOPT_PROXYUSERPWD 7.1 <NA> <NA> 10006
#> 953 CURLPROXY_HTTP 7.10 <NA> <NA> 0
#> 954 CURLPROXY_HTTP_1_0 7.19.4 <NA> <NA> 1
#> 955 CURLPROXY_HTTPS 7.52.0 <NA> <NA> 2
#> 956 CURLPROXY_HTTPS2 8.1.0 <NA> <NA> 3
#> 957 CURLPROXY_SOCKS4 7.10 <NA> <NA> 4
#> 958 CURLPROXY_SOCKS4A 7.18.0 <NA> <NA> 6
#> 959 CURLPROXY_SOCKS5 7.10 <NA> <NA> 5
#> 960 CURLPROXY_SOCKS5_HOSTNAME 7.18.0 <NA> <NA> 7
#> type
#> 157 <NA>
#> 221 <NA>
#> 277 <NA>
#> 457 <NA>
#> 458 <NA>
#> 459 <NA>
#> 498 <NA>
#> 640 string
#> 641 integer
#> 661 integer
#> 706 string
#> 726 string
#> 735 string
#> 736 string
#> 737 unknown
#> 738 string
#> 739 string
#> 740 string
#> 741 unknown
#> 742 string
#> 743 string
#> 744 string
#> 745 string
#> 746 integer
#> 747 integer
#> 748 integer
#> 749 string
#> 750 unknown
#> 751 string
#> 752 string
#> 753 unknown
#> 754 string
#> 755 integer
#> 756 string
#> 757 string
#> 758 string
#> 759 string
#> 760 integer
#> 761 integer
#> 762 string
#> 763 string
#> 764 integer
#> 765 integer
#> 766 string
#> 767 string
#> 953 <NA>
#> 954 <NA>
#> 955 <NA>
#> 956 <NA>
#> 957 <NA>
#> 958 <NA>
#> 959 <NA>
#> 960 <NA>
# Curl/ssl version info
curl_version()
#> $version
#> [1] "7.81.0"
#>
#> $headers
#> [1] "7.81.0"
#>
#> $ssl_version
#> [1] "OpenSSL/3.0.2"
#>
#> $libz_version
#> [1] "1.2.11"
#>
#> $libssh_version
#> [1] "libssh/0.9.6/openssl/zlib"
#>
#> $libidn_version
#> [1] "2.3.2"
#>
#> $host
#> [1] "x86_64-pc-linux-gnu"
#>
#> $protocols
#> [1] "dict" "file" "ftp" "ftps" "gopher" "gophers" "http"
#> [8] "https" "imap" "imaps" "ldap" "ldaps" "mqtt" "pop3"
#> [15] "pop3s" "rtmp" "rtsp" "scp" "sftp" "smb" "smbs"
#> [22] "smtp" "smtps" "telnet" "tftp"
#>
#> $ipv6
#> [1] TRUE
#>
#> $http2
#> [1] TRUE
#>
#> $idn
#> [1] TRUE
#>
#> $url_parser
#> [1] TRUE
#>