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Virtuoso Functions Guide

Administration
Aggregate Functions
Array Manipulation
BPEL APIs
Backup
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Cursor
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Encoding & Decoding
File Manipulation
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Type Mapping
UDDI
User Defined Types & The CLR
Virtuoso Java PL API
Virtuoso Server Extension Interface (VSEI)
Web Server & Internet
dav add & update fun...
dav manipulation fun...
dav search functions
dav_exp
lfs_exp
serv_queue_top
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_body_read
http_client
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

write to HTTP client or a string output stream
http (in val_expr any, [in stream any]);
Parameters
val_expr – A value expression. May be any scalar expression.
stream – Optional parameter. If omitted or is 0 and the function is executed within a VSP context, the val_expr will be written to the HTTP client. If present and non-zero, val_expr will be written to the specified stream. If non-zero, the value must be a valid stream obtained from function string_output
Description

http writes val_expr to HTTP client or, if parameter stream is given, to the given string output stream.

val_expr may be any scalar object, i.e. string, date or number and will automatically be cast to varchar before further processing. http will print out the string without escapes. http_value uses HTML escapes and http_url URL escapes.

Errors
SQLState Error Code Error Text Description
22023 HT007 An interactive blob can't be passed as argument to http
22023 HT008 http requires string, blob, or string session as argument 1
37000 HT006 http output function outside of http context and no stream specified: %s.

Examples
HTTP output

Output of various flavours of http. See string_output and string_output_string for examples how to use http to write to streams other than the HTTP output.

http (' % <b>')     ' <b>
http_value (' % <b>')   % &lt;b&gt;
http_url (' % <b>')  +%25+<b>
http_value (12, 'li')  <li>12</li>
See Also

http_value, http_url, string_output, http_rewrite.