llGetHTTPHeader
string llGetHTTPHeader(key request_id,// Unique key of the HTTP request.string header// Lowercase name of the HTTP header to retrieve.
);- Returns
string- Energy
- 10
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.
Returns a string that is the value for header for request_id.
string result = llGetHTTPHeader(NULL_KEY, "");Specification
Section titled “Specification”Generated Headers
Section titled “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
Section titled “Common Headers”| header | description | example |
|---|---|---|
| “user-agent” | The user-agent header as reported by the requester |
| 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
Section titled “Caveats”- Header information becomes inaccessible after 30 seconds or if
llHTTPResponseis called. - Function returns an empty string in any context outside the
http_requestevent. For instance, it cannot be used in thehttp_responseevent. - 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
Section titled “Examples”Example 1
40 collapsed lines
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);6 collapsed lines
llOwnerSay("body:\n" + body); llHTTPResponse(id, 200, body); } }}- There is no specific function to set HTTP headers. Use
llHTTPRequestwithHTTP_CUSTOM_HEADERfor requests. There is no way to set headers for responses.
History
Section titled “History”- SVN:1836 r112899 Trunk
See also
Section titled “See also”Functions
Section titled “Functions”Events
Section titled “Events”Articles
Section titled “Articles”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.