Second Life: Talking to the outside world.

Hobbes

thought I'd document this here as I am finding it a pain to get information and I need somewhere to stick stuff I can find again.

Anyway, if your not familar with SL -> www.secondlife.com

They allow you to develop stuff in LSL code. The code is reasonable enough, but still trying to figure stuff out. If there is any SL experts out there let me know.

So I wanted to create an object in SL that would talk to a servlet and then respond back.

I created a basic servlet with the following doPost.

[PHP]
File file = new File("/SLHeaders.txt");

PrintWriter out = new PrintWriter(file);

out.println("**** SLTalkTo Begin ****");
out.println("Request headers:");

Enumeration headerNames = request.getHeaderNames();
while (headerNames.hasMoreElements()) {
String key = (String)headerNames.nextElement();
String value = request.getHeader(key);
out.println(" " + key + " = " + value);
}

out.println("**** SLTalkTo End ****");

out.close();

response.setContentType("text/plain");
PrintWriter body = response.getWriter();
body.println("Hello from the servlet!");
body.close();
[/PHP]

Simple enough servlet. It would save the HTTP headers to a file and tell the SL object Hello.

So in SL I then selected build, created a generic sphere and added the following script.

[PHP]
key http_request_id;
default
{

touch_start(integer total_number)
{
string url = "http://my.server.com/SLTest/SLTalkTo";
list parameters = [HTTP_METHOD, "POST", HTTP_MIMETYPE, "application/x-www-form-urlencoded"];

string body = "";

http_request_id = llHTTPRequest(url, parameters, body);
}

http_response(key request_id, integer status, list metadata, string body)
{
llSay(0,body);
}
}
[/PHP]

For obvious reasons I removed my test server name. But this appears to work fine. When I ran it I got the following in the text file.

**** SLTalkTo Begin ****
Request headers:
host = my.server.com
pragma = no-cache
accept-encoding = deflate, gzip
accept = text/*
accept-charset = utf-8;q=1.0, *;q=0.5
content-type = application/x-www-form-urlencoded
user-agent = Second Life LSL/1.13.4(8) (http://secondlife.com)
x-secondlife-shard = Production
x-secondlife-object-name = SLTalkToTest
x-secondlife-object-key = 6959247c-b3fd-dfc5-5aa0-a88422839040
x-secondlife-region = Sandbox Island (254464, 255488)
x-secondlife-local-position = (160.549347, 244.315796, 26.307798)
x-secondlife-local-rotation = (0.000000, 0.707107, 0.000000, 0.707107)
x-secondlife-local-velocity = (0.000000, 0.000000, 0.000000)
x-secondlife-owner-name = xxxxxxxx
x-secondlife-owner-key = e7c80d7d-aabd-4e6f-86ee-43520181812d
content-length = 25
via = 1.1 sim2445.agni.lindenlab.com:3128 (squid/2.5.STABLE9)
x-forwarded-for = 127.0.0.1
cache-control = max-age=259200
connection = keep-alive
**** SLTalkTo End ****

So now my next steps is to figure out how to pass data like attributes/parameters and return the same to the object so it can interact on it.

Hells_Belle

Ahh the joys of LSL

Actually, the folks in the scripting forum on the secondlife website are very nice people, especially when you're asking more interesting questions than "how do I hand out a notecard?"

Which is, err, about the level of question I normally ask