Skip to content
lsl.devlsl.devLSL Dev

LlGetHTTPHeader

Looking for the current API? Open the llGetHTTPHeader reference →

Function notes

Returns an empty string if the header is not found, if the request_id is not a valid key received through the http_request event, or if the headers can no longer be accessed. Headers can only be accessed before llHTTPResponse is called and with-in the first 30 seconds after the http_request event is queued.

Return value notes

Returns a string that is the value for header for request_id.

Specification

Generated Headers

These headers are automatically generated by the simulator, they were not actually sent by the requesting client. They supply information about the request to make parsing easier.
Sample URL: https://sim3015.aditi.lindenlab.com:12043/cap/a7717681-2c04-e4ac-35e3-1f01c9861322/foo/bar?arg=gra
header description example
"x-script-url" The base url, as originally received from llRequestURL/llRequestSecureURL https://sim3015.aditi.lindenlab.com:12043/cap/a7717681-2c04-e4ac-35e3-1f01c9861322
"x-path-info" Any trailing path information from the requested url /foo/bar
"x-query-string" Any query arguments, the text past the first "?" in the url arg=gra
"x-remote-ip" IP address of the host that made the request

Common Headers

header description example
"user-agent" The user-agent header as reported by the requester

llHTTPRequest Headers

Headers sent by the simulator in the course of calling llHTTPRequest.
Header Description Example data
connection Connection options close
cache-control Maximum response age accepted. max-age=259200
x-forwarded-for Used to show the IP address connected to through proxies. 127.0.0.1
via Shows the recipients and protocols used between the User Agent and the server. 1.1 sim10115.agni.lindenlab.com:3128 (squid/2.7.STABLE9)
content-length The size of the entity-body, in decimal number of octets. 17
pragma The message should be forwarded to the server, even if it has a cached version of the data. no-cache
x-secondlife-shard The environment the object is in. "Production" is the main grid and "Testing" is the preview grid Production
x-secondlife-region The name of the region the object is in, along with the global coordinates of the region's south-west corner Jin Ho (264448, 233984)
x-secondlife-owner-name Legacy name of the owner of the object Zeb Wyler
x-secondlife-owner-key UUID of the owner of the object 01234567-89ab-cdef-0123-456789abcdef
x-secondlife-object-name The name of the object containing the script Object
x-secondlife-object-key The key of the object containing the script 01234567-89ab-cdef-0123-456789abcdef
x-secondlife-local-velocity The velocity of the object 0.000000, 0.000000, 0.000000
x-secondlife-local-rotation The rotation of the object containing the script 0.000000, 0.000000, 0.000000, 1.000000
x-secondlife-local-position The position of the object within the region (173.009827, 75.551231, 60.950001)
user-agent The user-agent header sent by LSL Scripts. Contains Server version. Second Life LSL/16.05.24.315768 (http://secondlife.com)
content-type The media type of the entity body. text/plain; charset=utf-8
accept-charset Acceptable character sets from the server. Q being the quality expected when sending the different character sets. utf-8;q=1.0, *;q=0.5
accept Media types the server will accept. text/*, application/xhtml+xml, application/atom+xml, application/json, application/xml, application/llsd+xml, application/x-javascript, application/javascript, application/x-www-form-urlencoded, application/rss+xml
accept-encoding Acceptable content encodings for the server. deflate, gzip
host The internet host being requested. secondlife.com

Caveats

  • Header information becomes inaccessible after 30 seconds or if llHTTPResponse is called.
  • Function returns an empty string in any context outside the http_request event. For instance, it cannot be used in the http_response event.
  • Custom headers are not supported, only the headers listed in the specification are supported.
  • LSL is not a CGI environment
    • "Content-Type" is an example of a normal header name, in a CGI environment the name would be "HTTP_CONTENT_TYPE".
  • header must be lower case (or it will match nothing). All header names are converted to lower case when they are received.
  • When making a request...
    • The path part of the URL must be prefixed with a forward slash
      • Good: https://sim3015.aditi.lindenlab.com:12043/cap/a7717681-2c04-e4ac-35e3-1f01c9861322/foo
      • Bad: https://sim3015.aditi.lindenlab.com:12043/cap/a7717681-2c04-e4ac-35e3-1f01c9861322foo
    • In order to use the query string, you must include a path (even if it is just a slash)
      • Good: https://sim3015.aditi.lindenlab.com:12043/cap/a7717681-2c04-e4ac-35e3-1f01c9861322/?arg=gra
      • Bad: https://sim3015.aditi.lindenlab.com:12043/cap/a7717681-2c04-e4ac-35e3-1f01c9861322?arg=gra

Examples

key url_request;

default
{
    state_entry()
    {
        url_request = llRequestURL();
    }

    http_request(key id, string method, string body)
    {
        if (url_request == id)
        {
        //  if you're usually not resetting the query ID
        //  now is a good time to start!
            url_request = "";

            if (method == URL_REQUEST_GRANTED)
            {
                llOwnerSay("URL: " + body);

                key owner = llGetOwner();
                vector ownerSize = llGetAgentSize(owner);

                if (ownerSize)//  != ZERO_VECTOR
                    llLoadURL(owner, "I got a new URL!", body);
            }

            else if (method == URL_REQUEST_DENIED)
                llOwnerSay("Something went wrong, no url:\n" + body);
        }

        else
        {
            list headerList = ["x-script-url",
                            "x-path-info", "x-query-string",
                            "x-remote-ip", "user-agent"];

            integer index = -llGetListLength(headerList);
            do
            {
                string header = llList2String(headerList, index);
                llOwnerSay(header + ": " + llGetHTTPHeader(id, header));
            }
            while (++index);

            llOwnerSay("body:\n" + body);
            llHTTPResponse(id, 200, body);
        }
    }
}

Notes

See also: functions

llGetFreeURLs
llRequestURL
llRequestSecureURL
llReleaseURL
llHTTPResponse

See also: events

http_request

See also: articles

LSL http server
Wikipedia:List of HTTP headers

History

  • SVN:1836 r112899 Trunk
Original wiki source

Some wiki templates and tables need their original context. View this article on the Second Life Wiki. Technical wording and examples are retained from the source; historical guidance may differ from current behavior.