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Preface

Virtuoso Functions Guide

Administration
Aggregate Functions
Array Manipulation
BPEL APIs
Backup
Compression
Cursor
Date & Time Manipulation
Debug
Dictionary Manipulation
Encoding & Decoding
File Manipulation
Free Text
Hashing / Cryptographic
LDAP
Locale
Mail
Miscellaneous
Number
Phrases
RDF data
Remote SQL Data Source
Replication
SOAP
SQL
String
Transaction
Type Mapping
UDDI
User Defined Types & The CLR
VAD
Virtuoso Java PL API
Virtuoso Server Extension Interface (VSEI)
Web & Internet
dav add & update fun...
dav lock manipulatio...
dav manipulation fun...
dav search functions
dav_exp
lfs_exp
serv_queue_top
urlrewrite_create_re...
user_key_load
vhost_define
vhost_remove
webdav users & group...
client_attr
connection_get
connection_id
connection_is_dirty
connection_set
connection_vars
connection_vars_set
dbname
ftp_get
ftp_ls
ftp_put
get_certificate_info
get_keyword
get_keyword_ucase
http
http_acl_get
http_acl_remove
http_acl_set
http_body_read
http_client
http_client_ext
http_client_ip
http_debug_log
http_enable_gz
http_file
http_flush
http_get
http_header
http_header_get
http_kill
http_listen_host
http_map_get
http_map_table
http_param
http_path
http_pending_req
http_physical_path
http_proxy
http_request_get
http_request_header
http_request_status
http_rewrite
http_root
http_url
http_value
http_xslt
ses_connect
ses_disconnect
ses_read_line
ses_write
tcpip_gethostbyaddr
tcpip_gethostbyname
vsp_calculate_digest
wsdl_import_udt
XML
XPATH & XQUERY

Functions Index

http_client

returns a varchar containing the body of the request uri
varchar http_client (in url varchar, [in uid varchar], [in pwd varchar], [in http_method varchar], [in http_headers varchar], [in body varchar], [in cert_file varchar], [in cert_pwd varchar], [in timeout varchar], [in proxy varchar], [in ca_certs varchar], [in insecure integer], [in n_redirects integer]);
Description

This function is used to perform HTTP operations to retrieve generic content and/or to perform generic operations over HTTP/HTTPS protocols. It also supports HTTP authentication based on username/password credentials.

If the URL is https: an no x509 certificate given then it will operate as https client w/o client certificate.

Parameters
url – target URL (http: or https: are supported)
uid – user name
pwd – user password
http_method – 'GET', 'POST', 'HEAD' or 'PUT'
http_headers – a string containing a HTTP headers supplied by application
body – content to be sent
cert_file – cpath to the certificate file where is stored x509 certificate, private key and CA certificates Can accept 'db:' notation, i.e. can use also keys stored in Virtuoso PKI repository.
cert_pwd – password for opening the certificate file.
timeout – use to set how many seconds to wait for reply from the client
proxy – supports:
http://[user:pass@]host:port - user & pass are optional
socks4://[user:pass@]host:port - user & pass are optional
socks5://[user:pass@]host:port - user & pass are optional
socks5-host://[user:pass@]host:port - user & pass are optional
In the INI file, in section HTTPServer should be set:
HTTPProxyServer       = proxytest:3128
HTTPProxyExceptions   = localhost:8890, 127.0.0.1:8890
Exception could be also 127.0.0.* i.e. there could have also wildcard.
ca_certs – Certificate CA. Default is null.
insecure – Sets secure or not. Default is 0.
n_redirects – By default int zero. If is given value greater than zero, so many redirects will be followed by client. Thus in pl no need to look at 30x response, just can add this number to follow the redirects.