Difference between revisions of "User:Void Singer/Teacup"

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(v0.3 Upgrade - Redo revision 1141105 by Void Singer (Talk))
m (Replaced old <LSL> block with <source lang="lsl2">, also for <javascript>)
 
(6 intermediate revisions by one other user not shown)
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{{void-box
{{void-box
|title=Teacup/Saucer
|title=Teacup
|content=
|content=
=== [[File:Teacup.png|frameless|left|256px|alt=Teacup/Saucer]]What is it? ===
=== [[File:Teacup.png|frameless|left|256px|alt=Teacup/Saucer]]What is it? ===
----
----
Teapot is an open source webserver front end for LSL's HTTP-in + {{HoverText|MOAP|Media On A Prim}} functionality. It builds on the work of several other people including but not limited to, [[User:Kelly_Linden|Kelly Linden]], [[User:Torley_Linden|Torley Linden]], [[User:Tali_Rosca|Tali Rosca]], [[User:Vegas_Silverweb|Vegas Silverweb]], and special mentions to [[User:Kate_Linden|Kate]] and/or [[User:Edelman_Linden|Edelman]] Linden. The idea is to make it easy to serve web content from within SL, with a minimum of work or understanding, in the most standards compliant and flexible way possible.
Teacup is an open source webserver front end for LSL's HTTP-in + {{HoverText|MOAP|Media On A Prim}} functionality. It builds on the work of several other people including but not limited to, [[User:Kelly_Linden|Kelly Linden]], [[User:Torley_Linden|Torley Linden]], [[User:Tali_Rosca|Tali Rosca]], [[User:Vegas_Silverweb|Vegas Silverweb]], and special mentions to [[User:Kate_Linden|Kate]] and/or [[User:Edelman_Linden|Edelman]] Linden. The idea is to make it easy to serve web content from within SL, with a minimum of work or understanding, in the most standards compliant and flexible way possible.


=== How does it work? ===
=== How does it work? ===
----
----
Externally, when Teacup starts, it gets a URL and creates a Micro HTML page, which it bootstraps onto the prim face with a "data:" URN. Once loaded, that page requests a JavaScript library, which loads normally. Once loaded, the library bootstraps the specially prepared ".tsp" HTML content onto the current page, and captures all links targeting other ".tsp" pages, so that it can do the same when they are requested. Internally the server broadcasts a message when it gets a page request, and any installed File Service scripts can reply with content, or the server will simply report back that it doesn't have the file requested if it doesn't receive a reply in a set time.
Externally, when Teacup starts, it gets a URL and creates a Micro HTML page, which it bootstraps onto the prim face with a "data:" URN. Once loaded, that page requests a JavaScript library, which loads normally. Once loaded, the library bootstraps the specially prepared {{HoverText|".tsp"|Teacup Server Page}} HTML content onto the current page, and captures all links targeting other {{HoverText|".tsp"|Teacup Server Page}} files, so that it can do the same when they are requested. Internally the server broadcasts a message when it gets a page request, and any installed File Service scripts can reply with content, or the server will simply report back that it doesn't have the file requested if it doesn't receive a reply in a set time.


=== Why all the tea jokes? ===
=== Why all the tea jokes? ===
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Well I happen to like steam punk stuff, and it has a sort of pseudo-Victorian-era feel to it, but in all truth it was sparked by a bit of geek humor. There was an old [http://en.wikipedia.org/wiki/April_Fools%27_Day_RFC april fool's joke] passed around as an [http://tools.ietf.org/html/rfc2324 official sounding memo] about creating a protocol for [http://en.wikipedia.org/wiki/Hyper_Text_Coffee_Pot_Control_Protocol controlling coffee pots with HTTP] (back before they actually started making net enabled appliances) and part of that proposal was that teapots should return an error response '''418 "I'm a teapot"''' if you tried to make it brew coffee... since these servers are small, and 418 is safe to use internally because it wouldn't normally be encountered, I figured hey, Teapot --> Teacup --> Victorian Imagery --> Steam Punk --> teacup that is it's own teapot --> {{HoverText|SIP|Server In a Prim}} --> many different types of tea --> Success!
Well I happen to like steam punk stuff, and it has a sort of pseudo-Victorian-era feel to it, but in all truth it was sparked by a bit of geek humor. There was an old [http://en.wikipedia.org/wiki/April_Fools%27_Day_RFC april fool's joke] passed around as an [http://tools.ietf.org/html/rfc2324 official sounding memo] about creating a protocol for [http://en.wikipedia.org/wiki/Hyper_Text_Coffee_Pot_Control_Protocol controlling coffee pots with HTTP] (back before they actually started making net enabled appliances) and part of that proposal was that teapots should return an error response '''418 "I'm a teapot"''' if you tried to make it brew coffee... since these servers are small, and 418 is safe to use internally because it wouldn't normally be encountered, I figured hey, Teapot --> Teacup --> Victorian Imagery --> Steam Punk --> teacup that is it's own teapot --> {{HoverText|SIP|Server In a Prim}} --> many different types of tea --> Success!


... And thus was born the [[Server In a Prim|SIP]], [[User:Void_Singer/Teacup|Teacup]] server, and [[User:Void_Singer/Red_Tea|Red Tea]] File Service<br>(developers are encouraged to keep the theme, but it's not a requirement)
... And thus was born the [[Server_In_a_Prim|SIP]], [[User:Void_Singer/Teacup|Teacup]] server, and [[User:Void_Singer/Red_Tea|Red Tea]] File Service<br>(developers are encouraged to keep the theme, but it's not a requirement)
:[[User:Void Singer/Teacup#Return_to_Void_Singers_user_page|Return to top]]
:[[User:Void Singer/Teacup#Return_to_Void_Singers_user_page|Return to top]]
}}
}}
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|content=
|content=
So you don't want to read a bunch of tech babble, you just want to make a website in a prim right? Well I can sympathize so here are some (mostly) easy steps to get you up and running fast...
So you don't want to read a bunch of tech babble, you just want to make a website in a prim right? Well I can sympathize so here are some (mostly) easy steps to get you up and running fast...
# Rez a box and name it something creative, like "My website"
# Follow the instructions on [[User:Void_Singer/Red_Tea|This Page]] or choose a File Service from the [[User:Void_Singer/Teacup#Compatible_File_Services_and_Extensions|Compatible File Services and Extensions]] and follow those instructions.
# Follow the instructions on [[User:Void_Singer/Red_Tea|This Page]] or choose a File Service from the [[User:Void_Singer/Teacup#Compatible_File_Services_and_Extensions|Compatible File Services and Extensions]] and follow those instructions.
# Copy the text in the grey box below [[User:Void_Singer/Teacup#Saucer|Code: Saucer]] into a script named "Saucer v0.3", save it, and drop it in your rezzed box
# Optional: Copy the text in the grey box below [[User:Void_Singer/Region_Stats#Region_Stats|Code: Region Stats]] into a script named "Region Stats", save it, and drop it into your rezzed box.
# Copy the text in the grey box below [[User:Void_Singer/Teacup#Teacup|Code: Teacup]] into a script named "Teacup v0.3", save it, and drop it in your rezzed box
# Optional: Copy the text in the grey box below [[User:Void_Singer/Saucer#Saucer|Code: Saucer]] into a script named "Saucer", save it, and drop it in your rezzed box.
# Optional: Copy the text in the grey box below [[User:Void_Singer/Tea_Strainer#Tea_Strainer|Code: Tea Strainer]] into a script named "Tea_Strainer", save it, and drop it in your rezzed box.
# Copy the text in the grey box below [[User:Void_Singer/Teacup#Teacup|Code: Teacup]] into a script named "Teacup v0.5", save it, and drop it in your rezzed box.
# Click on the top of your box if your webpage isn't already showing.
# Click on the top of your box if your webpage isn't already showing.
#* At this point you may want to rotate and/or resize your box.
#* At this point you may want to rotate and/or resize your box.
#* If you like, you have my express permission to download (right click, "save as") and edit (with whatever image editor you like) the [[:File:Teacup.png|Teacup.png]] file to use as the default texture of your website prim.
#* If you like, you have my express permission to download (right click, "save as") and edit (with whichever image editor you prefer) the [[:File:Teacup.png|Teacup.png]] file to use as the default texture of your website prim.
# Show it off to your friends with {{HoverText|MOAP|Media On A Prim}} enabled viewers
# Show it off to your friends with {{HoverText|MOAP|Media On A Prim}} enabled viewers.




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=== Teacup ===
=== Teacup ===
----
----
* Save in a script named "Teacup"
* Save in a [[Mono#How_to_use_Mono|MONO]] script named '''"Teacup v0.5"'''
<lsl>/*( Teacup Server v0.3 )*/
<source lang="lsl2">/*( Teacup Server v0.5 )*/


//-- stores the entire bootstrap or error page for touch handling
string gStrErr0 = "data:text/html;charset=utf-8,
<html>
    <body>
        <h1 style='align: center;'>Out of Service</h1>
        <hr/>
        <p>Url Interface Unavailable or a Server script failed to respond</p>
        <hr/>
        <p style='text-align:center;font-size:50%;'>Teacup/Saucer v0.3<br/>
          <a href='secondlife:///app/agent/";
string gStrErr1 = "/about'>Contact Owner</a></p>
    </body>
</html>";


//-- pending request queue for pages waiting to be served
/*//-- Teacup Boot Strap Variables --//*/
//-- this (hopefully) prevents reponding after SL send a timeout.
//-- Server Default page start (always loads)
list  gLstPndKey;
string  gStrTBS1xx = "data:text/html;charset:utf-8,<html>\n";
list  gLstPndTim;
//-- Head Section start: loads with URL_REQUEST_GRANTED
string  gStrTBS1a1 = " <head>\n <base href='";
//-- Head Section end & Address intsertion point: loads with URL_REQUEST_GRANTED
string  gStrTBS1a2 = "'/>\n <script type='text/javascript' defer='' src='teacup.js'></script>\n </head>\n";
//-- Server Default message (always loads)
string  gStrTBS2xx = " <body>\n <h1>Teacup Server</h1>\n <hr/>\n <h2>If you are reading this, the <em>server</em> is working</h2>\n";
//-- Default Error message: loads with URL_REQUEST_GRANTED
string  gStrTBS2a1 = " <h3>(But the File Service may not be)</h3>\n";
//-- URL Failure MessageL included for URL_REQUEST_DENIED
string  gStrTBS2b1 = " <h3>(But the region failed to provide a URL)</h3>\n";
//-- Server Default Footer start (always loads)
string  gStrTBS3xx = " <hr/>\n <p>Teacup/Saucer v0.3<br/><a href='secondlife:///app/agent/";
//-- Server Default Footer end & Contact Owner key insertion point (always loads)
string  gStrTBS4xx = "/about'>Contact Owner?</a></p>\n </body>\n</html>";
 
/*//-- Pending Request Variables --//*/
list    gLstPndKey; //-- Key queue (pages waiting to be served)
list    gLstPndTim; //-- Timeout Value queue (Request Timeout)
//-- These (hopefully) prevent multiple responses if SL sends a timeout.


key    gKeyRqs;
integer gIntRqs;


default{
default{
    state_entry(){
state_entry(){ //-- Request URL on start up
        //-- Request URL on start up
llRequestURL();
        llRequestURL();
}
    }
   
on_rez( integer vIntBgn ){ //-- Clear pending and request new URL on rez
    on_rez( integer vIntBgn ){
gLstPndKey = gLstPndTim = [];
        //-- Clear pending and request URL on rez
llRequestURL();
        gLstPndKey = gLstPndTim = [];
}
        llRequestURL();
    }
changed( integer vBitChg ){ //-- Clear pending and re-request URL on region change/restart
   
if ((CHANGED_REGION_START | CHANGED_REGION) & vBitChg){
    changed( integer vBitChg ){
gLstPndKey = gLstPndTim = []; //-- Consider sending custom 404's or 205's here instead
        if ((CHANGED_REGION_START | CHANGED_REGION) & vBitChg){
llRequestURL();
            //-- Clear pending and request URL on region restart, or region change
}
            gLstPndKey = gLstPndTim = [];
}
            llRequestURL();
        }
http_request( key vKeySrc, string vStrMth, string vStrBdy ){
    }
integer vIntMth = llListFindList( [URL_REQUEST_DENIED, URL_REQUEST_GRANTED, "POST", "GET"], [vStrMth] );
   
if (4 & vIntMth){
    touch_end( integer vIntTch ){
//-- trap unused here, check we hasve a valid non root file name on the next line
        if (!llDetectedTouchFace( 0 )){
}else if (2 & vIntMth){ if (vStrMth = llUnescapeURL( llDeleteSubString( llGetHTTPHeader( vKeySrc, "x-path-info" ), 0, 0 ) )){
            llMessageLinked( llGetLinkNumber(), 418, "", gKeyRqs  = llDetectedKey( 0 ));
llMessageLinked( LINK_SET,
            if (!~llListFindList( gLstPndKey, [gKeyRqs = " " + (string)gKeyRqs] )){
                418,
                ++gIntRqs;
                vStrMth + "?" + llGetHTTPHeader( vKeySrc, "x-query-string" ) +
                gLstPndKey = [gKeyRqs] + gLstPndKey;
                "#ip=" + llGetHTTPHeader( vKeySrc, "x-remote-ip" ) + "&" + vStrBdy,
                gLstPndTim = [llGetUnixTime() + 2] + gLstPndTim;
                vKeySrc );
                llSetTimerEvent( 3.0 );
if (gLstPndTim == []){
            }
llSetTimerEvent( 3.0 );
        }
}
    }
gLstPndKey += [vKeySrc];
   
gLstPndTim += [llGetUnixTime() + 20];
    http_request( key vKeySrc, string vStrMth, string vStrBdy ){
}//-- can handle root requests here later if we want
        if (URL_REQUEST_GRANTED == vStrMth){ //-- Got a url, push the bootsrap page
}else{ //-- URL request response: set hover text, push proper page format to prim face
            llSetPrimitiveParams( [PRIM_TEXT, vStrBdy + "/", ZERO_VECTOR, 0.0] );
if (vIntMth || llList2String( llGetPrimitiveParams( [PRIM_TEXT] ), 0 ) != "No URL"){
            llMessageLinked( llGetLinkNumber(), 418, "", gKeyRqs = llGetKey() );
llSetPrimitiveParams( [PRIM_TEXT, llList2String( ["No URL", (vStrBdy += "/")], vIntMth ), <(float)(!vIntMth), 0.5, 0.5>, 0.0] );
            ++gIntRqs;
vStrBdy = gStrTBS1xx + llList2String( ["", gStrTBS1a1 + vStrBdy + gStrTBS1a2], vIntMth ) + gStrTBS2xx +
            gLstPndKey = [gKeyRqs = " " + (string)gKeyRqs] + gLstPndKey;
  llList2String( [gStrTBS2a1, gStrTBS2a1], vIntMth ) + gStrTBS3xx + (string)llGetOwner() + gStrTBS4xx;
            gLstPndTim = [llGetUnixTime() + 2] + gLstPndTim;
llSetPrimMediaParams( 0, [PRIM_MEDIA_HOME_URL, vStrBdy, PRIM_MEDIA_CURRENT_URL, vStrBdy] );
            llSetTimerEvent( 3.0 );
llMessageLinked( LINK_SET, 418, "Teacup URL changed", NULL_KEY );
        }else if (URL_REQUEST_DENIED == vStrMth){ //-- didn't get a url, push a warning page
} //-- Next Line: abuse Sensor Repeat to retry on no URL in 5 mins
            llSetPrimitiveParams( [PRIM_TEXT, "", ZERO_VECTOR, 0.0] );
llSensorRepeat( "", llGetKey(), AGENT, 0.0001 * !vIntMth, PI, 300.0 * !vIntMth );
            vStrBdy = gStrErr0 + (string)llGetOwner() + gStrErr1;
}
            llSetPrimMediaParams( 0, [PRIM_MEDIA_HOME_URL, vStrBdy, PRIM_MEDIA_CURRENT_URL, vStrBdy] );
}
        }else if ("GET" == vStrMth){ //-- got a page request
            //-- reuse the method string to see if it's a valid file path or the root
link_message( integer vIntSrc, integer vIntDta, string vStrDta, key vKeyDta ){
            //-- if the request has already timed out, it'll be blank and ignored
if (~vIntSrc = llListFindList( [200, 201, 202, 204, 403, 404], [vIntDta] )){ //-- valid return code?
            if (vStrMth = llUnescapeURL( llDeleteSubString( llGetHTTPHeader( vKeySrc, "x-path-info" ), 0, 0 ) )){
if (~vIntSrc = llListFindList( gLstPndKey, [vKeyDta] )){ //-- request still pending?
                //-- send a request for the content we want
llHTTPResponse( vKeyDta, vIntDta, vStrDta ); //-- Serve request & remove from pending queue
                llMessageLinked( LINK_SET, 418, vStrMth, vKeySrc );
gLstPndKey = llDeleteSubList( gLstPndKey, vIntSrc, vIntSrc );
                //-- store the request and a timeout value so we don't try to send pages after SL has already sent a timeout
gLstPndTim = llDeleteSubList( gLstPndTim, vIntSrc, vIntSrc );
                gLstPndKey += [vKeySrc];
}
                gLstPndTim += [llGetUnixTime() + 20];
}
                if (gLstPndTim == [""]){
}
                    llSetTimerEvent( 3.0 );
                }
timer(){ //-- Optimally, runs once on an empty list for 3sec worth requests
            }
if (gLstPndTim != []){ //-- Pending requests?
        }
while (llList2Integer( gLstPndTim, 0 ) < llGetUnixTime()){ //-- are any expired?
    }
gLstPndTim = llDeleteSubList( gLstPndTim, 0, 0 ); //-- remove expired
   
gLstPndKey = llDeleteSubList( gLstPndKey, 0, 0 );
    link_message( integer vIntSrc, integer vIntDta, string vStrDta, key vKeyDta ){
if (gLstPndTim == []){ //-- Pending Queue empty?
        //-- only accept return status codes we understand.
llSetTimerEvent( 0.0 ); //-- Stop timer, and exit
        if (~vIntSrc = llListFindList( [101, 200, 201, 202, 203, 404], [vIntDta] )){
return;
            if (!vIntSrc){ //-- 101 is special handling
}
                vKeyDta = " " + (string)(gKeyRqs = vKeyDta);
}
            }
}else{ //-- No pending requests, turn off the timer
            //-- is the request still waiting to be served?
llSetTimerEvent( 0.0 );
            if (~vIntSrc = llListFindList( gLstPndKey, [vKeyDta] )){
}
                if (vKeyDta){
}
                    //-- server the request, remove it from the pending queue
                    llHTTPResponse( vKeyDta, vIntDta, vStrDta );
sensor( integer vIntNul ){
                }else{
//-- Dummy Sensor event required by SCR-53
                    if (llGetKey() == gKeyRqs){
}
                        llSetPrimMediaParams( 0, [PRIM_MEDIA_HOME_URL, vStrDta, PRIM_MEDIA_CURRENT_URL, vStrDta] );
                    }else{
no_sensor(){ //-- URL re-request 5 mins after failure
                        llLoadURL( gKeyRqs, "Teacup Server: " + llGetObjectName(), vStrDta );
llSensorRemove();
                    }
llRequestURL();
                }
}
                gLstPndKey = llDeleteSubList( gLstPndKey, vIntSrc, vIntSrc );
                gLstPndTim = llDeleteSubList( gLstPndTim, vIntSrc, vIntSrc );
            }
        }
    }
   
    timer(){ //-- optimally, this runs once on an empty list for 3sec worth of server requests
        if (gLstPndTim != []){ //-- are there items in the pending queue?
            while (llList2Integer( gLstPndTim, 0 ) < llGetUnixTime()){
                if (gIntRqs){
                    if (gKeyRqs = llDeleteSubString( llList2String( gLstPndKey, 0 ), 0, 0 )){
                        if (llGetKey() == gKeyRqs){
                            llSetPrimMediaParams( 0, [PRIM_MEDIA_HOME_URL, gStrErr0 + (string)llGetOwner() + gStrErr1,
                                                      PRIM_MEDIA_CURRENT_URL, gStrErr0 + (string)llGetOwner() + gStrErr1] );
                        }else{
                            llLoadURL( gKeyRqs, "Teacup Server: " + llGetObjectName(), gStrErr0 + (string)llGetOwner() + gStrErr1 );
                        }
                        --gIntRqs;
                    }
                } //--loop through and remove expired pending requests
                gLstPndTim = llDeleteSubList( gLstPndTim, 0, 0 );
                gLstPndKey = llDeleteSubList( gLstPndKey, 0, 0 );
                if (gLstPndTim == []){ //-- if the queue is emptied, stop the timer and exit
                    llSetTimerEvent( (float)(gIntRqs = 0) );
                    return;
                }
            }
        }else{
            llSetTimerEvent( 0.0 );
        }
    }
}
}
/*//--                          License Text                          --//*/
/*//--                          License Text                          --//*/
Line 186: Line 159:
/*//  Void Singer [ https://wiki.secondlife.com/wiki/User:Void_Singer ]  //*/
/*//  Void Singer [ https://wiki.secondlife.com/wiki/User:Void_Singer ]  //*/
/*//  All usages must contain a plain text copy of the previous 2 lines.  //*/
/*//  All usages must contain a plain text copy of the previous 2 lines.  //*/
/*//--                                                                  --//*/</lsl>
/*//--                                                                  --//*/</source>
^ [[User:Void Singer/Teacup#Return_to_Void_Singers_user_page|Return to top]]
^ [[User:Void Singer/Teacup#Return_to_Void_Singers_user_page|Return to top]]
=== Saucer ===
----
* Save in a script named "Saucer"
<lsl>/*( Saucer v0.3_ )*/
/*//-- Server Default Page Variables --//*/
string  gStrTS0 = "data:text/html;charset:utf-8,
<html>
    <head>
        <base href='"; //-- Insertion point: Base server address (pulled from prim description)
string gStrTS1 = "/'>
        <title>"; //-- Insertion point: Title (pulled from prim name)
string gStrTS2 = "</title>
        <script type='text/javascript' defer='1' src='teacup.js'></script>"; //-- Insertion point: site js/css if present (unsupported as of yet)
string  gStrTS3 = "
    </head>
    <body>
        <h1>Teacup Server Test Page</h1>
        <hr/>
        <p>ZOMG it works. If you are Still reading this, The File Service failed to respond or there is no index page available</p>
        <hr/>
        <p style='text-align:center;font-size:50%;'>"; //-- Insertion point: Known installed services
string  gStrTS4 = "<br/><a href='secondlife:///app/agent/"; //-- Insertion point:  Owners key for contact
string  gStrTS5 = "/about'>Contact Owner</a>
    </body>
</html>";
list    gLstSvc = ["Teacup/Saucer v0.3"]; //-- Known Services (only partially implemented)
/*//-- Request Handler variables --//*/
list    gLstPag = [""]; //-- List of known pages
list    gLst404Tim; //-- 404 timeout
list    gLst404Key; //-- 404 request key
list    gLst404Pag; //-- 404 page name (used for discovery only)
integer gIntLnk;    //-- link number to save on function calls


default{
    state_entry(){
        gIntLnk = llGetLinkNumber();
        llMessageLinked( LINK_SET, 418, " Server Start", NULL_KEY );
    }
   
    link_message( integer vIntSrc, integer vIntDta, string vStrDta, key vKeyDta ){
        if (vKeyDta){ //-- server traffic?
            if (418 == vIntDta && gIntLnk == vIntSrc){ //-- server request?
                if (!~vIntDta = llListFindList( gLstPag, [vStrDta = llList2String( llParseStringKeepNulls( vStrDta, ["?", "#"], [] ), 0 )] )){ //-- is that an invalid page?
                    gLst404Key += [vKeyDta];
                    gLst404Pag += [vStrDta];
                    gLst404Tim += [llGetUnixTime() + 2]; //-- this actually amount to a ~2.25sec timeout
                    if (gLst404Tim == [""]){ //-- only bump the timer if this is the only 404 pending.
                        llSetTimerEvent( 0.75 ); //-- give unadvertised backend services time to respond
                    }
                }else if (!vIntDta){
                    llMessageLinked( vIntSrc,
                                    101, //-- Server Push Root Mode //-- Next line: -- Insert Address
                                    gStrTS0 + llList2String( llGetPrimitiveParams( [PRIM_TEXT] ), 0 ) +
                                    gStrTS1 + llGetObjectName() +                //-- Insert Title
                                    gStrTS2 + //-- not yet implemented            //-- Insert site js/css
                                    gStrTS3 + llDumpList2String( gLstSvc, " " ) + //-- Insert Known Services
                                    gStrTS4 + (string)llGetOwner() +              //-- Insert Owner
                                    gStrTS5,                                      //-- End Default file
                                    vKeyDta );
                }
            }else if (~vIntSrc = llListFindList( gLst404Key, [vKeyDta] )){
                if (200 == vIntDta){ //-- auto discovery of  unadvertised pages
                    gLstPag += [llList2String( gLst404Pag, vIntSrc )];
                }
                gLst404Tim = llDeleteSubList( gLst404Tim, vIntSrc, vIntSrc );
                gLst404Key = llDeleteSubList( gLst404Key, vIntSrc, vIntSrc );
                gLst404Pag = llDeleteSubList( gLst404Pag, vIntSrc, vIntSrc );
            }
        }else if (22 == llAbs( vIntDta ) && NULL_KEY == (string)vKeyDta){
            //-- add handler for svc string and site js/css
            if (vIntDta & 0x800000){ //-- negative = remove
                if (~vIntDta = llListFindList( gLstPag, [vStrDta] )){
                    gLstPag = llDeleteSubList( gLstPag, vIntDta, vIntDta );
                }
            }else{ //-- positive == add
                if (!~vIntDta = llListFindList( gLstPag, [vStrDta] )){
                    //-- add handling for default js/css injection.
                    gLstPag += [vStrDta];
                }
            }
        }
    }
   
    timer(){
        //-- timer for 404 messages
        if (gLst404Tim != []){ //-- are there items in the pending queue?
            while (llList2Integer( gLst404Tim, 0 ) < llGetUnixTime()){
                //--send 404 then loop through and remove expired pending 404s
                llMessageLinked( llGetLinkNumber(), 404, "Not Found", llList2Key( gLst404Key, 0 ) );
                gLst404Tim = llDeleteSubList( gLst404Tim, 0, 0 );
                gLst404Key = llDeleteSubList( gLst404Key, 0, 0 );
                gLst404Pag = llDeleteSubList( gLst404Pag, 0, 0 );
                if (gLst404Tim == []){ //-- if the queue is emptied, stop the timer and exit
                    llSetTimerEvent( 0.0 );
                    return;
                }
            }
        }else{
            llSetTimerEvent( 0.0 );
        }
    }
}
/*//--                          License Text                          --//*/
/*//  Free to copy, use, modify, distribute, or sell, with attribution.  //*/
/*//    (C)2011 (CC-BY) [ http://creativecommons.org/licenses/by/3.0 ]    //*/
/*//  Void Singer [ https://wiki.secondlife.com/wiki/User:Void_Singer ]  //*/
/*//  All usages must contain a plain text copy of the previous 2 lines.  //*/
/*//--                                                                  --//*/</lsl>
^ [[User:Void Singer/Teacup#Return_to_Void_Singers_user_page|Return to top]]
=== teacup.js ===
=== teacup.js ===
----
----
* [[User:Void_Singer/Red_Tea|Red Tea]] expects this file saved in a notecard named "teacup.js"
* [[User:Void_Singer/Red_Tea|Red Tea]] expects this file saved in a notecard named "'''teacup.js'''"
* Other File systems may have different expectations for loading plain text files; Consult their documentation for details.
* Other File systems may have different expectations for loading plain text files; Consult their documentation for details.
  <nowiki>/*  teacup.js v0.3 <!-- */
  <source lang="javascript">/*  teacup.js v0.5 <!-- */
                   
function addEventListener( instance, eventName, listener ){
    var listenerFn = listener;
    if (instance.addEventListener){
        instance.addEventListener( eventName, listenerFn, false );
    }else if (instance.attachEvent){
        listenerFn = function(){ listener( window.event ); }
        instance.attachEvent( 'on' + eventName, listenerFn );
    }
}
 
function uBoil( vEvent ){
    if (vEvent.preventDefault){
        vEvent.preventDefault();
    }
    if (typeof( this.href ) != 'undefined'){
        uSteep( this.href );
    }else{
        var vSugar = document.createElement( 'link' );
        vSugar.setAttribute( 'rel', 'stylesheet' );
        vSugar.setAttribute( 'type', 'text/css' );
        document.getElementsByTagName( 'head' )[ 0 ].appendChild( vSugar );
        vSugar.href = 'teacup.css';
        uSteep( 'index.tsp' );
    }
}


function uSteep( vPage ){
var u0=function(){//-- faster!
    vTeabag = document.createElement( 'script' );
if(window.addEventListener){
    vTeabag.setAttribute( 'type', 'text/javascript' );
return function(l0,l1,l2){
    document.getElementsByTagName( 'head' )[ 0 ].appendChild( vTeabag );
l0.addEventListener(l1,l2,false);
    vEggTimer = setTimeout( 'uPour( \\'504 Gateway Timeout\\' )', 23000 );
};
    addEventListener( vTeabag, 'load', uPour );
}else if(window.attachEvent){
    vTeabag.src = vPage;
return function(l0,l1,l2){
}
l0.attachEvent('on'+l1,l2);
};
}
}();


function uPour( vErr ){
function u1(l0){
    clearTimeout( vEggTimer );
if (l0.preventDefault){
    if (typeof( vTea ) == 'undefined'){
l0.preventDefault();
        if (typeof( vErr ) != 'text'){
}//-- cross-compat?
            vErr == '000 Malformed Page';
v1=document.createElement('script');
        }
document.head.appendChild(v1);
        alert( vErr + '\\n' + vTeabag.src.substring( 81 ) );
u0(v1,'load',u2);//-- no 'type' breaks standards
    }else{
v1.src=(typeof(this.href)!='undefined')?this.href:l0;
        document.getElementsByTagName( 'body' )[ 0 ].innerHTML = vTea;
v2=setTimeout('u2(\'504 Gateway Timeout or 404 Not Found\')',23000);
        for (i = 0; i < document.links.length; i++){
            if (~document.links[ i ].href.indexOf( '.tsp' )){
                addEventListener( document.links[ i ], 'click', uBoil );
            }
        }
    }
    document.getElementsByTagName( 'head' )[ 0 ].removeChild( vTeabag );
    vTeabag = vTea = vEggTimer = (function(){})();
}
}
//-- v0,v1,v2 exist here
function u2(l0){//-- Achtung Baby!
clearTimeout(v2);
if(typeof(v0)=='undefined'){
if (typeof(l0)!='object'){
alert(l0+'\n'+v1.src.substring(81)+'\n');
}//-- catches timeouts, send js to alert others
}else{
document.body.innerHTML=v0;
for(var l1=0;l1<document.links.length;l1++){
if (~document.links[l1].href.indexOf('.tsp')){
u0(document.links[l1],'click',u1);
}
}//-- the double split seemed more effective than the regex
document.title=decodeURI(v1.src.split(document.head.getElementsByTagName('base')[0].href)[1].split('.tsp')[0]);
var l2;
v2=document.body.getElementsByTagName('script');
for(l1=0;l1<v2.length;l1++){
l2=document.createElement('script');
if(~v2[l1].src.indexOf('.js')){
l2.src=v2[l1].src;//-- no 'type' breaks standards
}else if(v2[l1].childNodes.length){
l2.appendChild(v2[l1].childNodes[0]);
}
v2[l1].parentNode.replaceChild(l2,v2[l1]);
}//-- extend script jumpstarter to link/css?
}//-- next line: clean up; aisle 2
document.head.removeChild(v1);
v0=v1=v2=(function(){})();
}//-- like that evil 'undefined' hack?


uBoil( '' );
window.onload=function(){//-- webkit is stupid and doesn't obey script tag defer/async attributes
document.head=document.head||document.getElementsByTagName('head')[0];
document.body=document.body||document.getElementsByTagName('body')[0];
u1('index.tsp');//-- default page name
};


/* --> */</nowiki>
/* -->
  (C)2011 (CC-BY) [ http://creativecommons.org/licenses/by/3.0 ]
Void Singer [ https://wiki.secondlife.com/wiki/User:Void_Singer ] */</source>
'''NOTE''': I recommend removing all the comments to make the file smaller (anything starting with '''//--''' to the end of the line)
:[[User:Void Singer/Teacup#Return_to_Void_Singers_user_page|Return to top]]
:[[User:Void Singer/Teacup#Return_to_Void_Singers_user_page|Return to top]]
}}
}}


{{void-box
{{void-box
|title=Protocol
|title=Protocols
|content=
|content=
This section is not required reading for users, it is really only of use to scripters looking understand of extend it.
This section is not required reading for users, it is really only of use to scripters looking understand or extend it.
=== Server Protocols ===
=== Server Protocols ===
----
----
==== File Requests ====
==== Outgoing Messages ====
The server communicates it's needs in the following format
----
<lsl>llMessageLinked( LINK_SET, REQUEST_CODE, REQUEST_PAGE, REQUEST_KEY );</lsl>
The server has only two outgoing message formats. The first is general advertisement, and can be used by any File Service or extension to advertise information about itself.
* LINK_SET: Request is broadacst to all prims (exception, the root page "" is requested in the local prim only)
<source lang="lsl2">llMessageLinked( LINK_SET, TEACUP_MESSAGE, "Message", NULL_KEY );</source>
* REQUEST_CODE: at this time, for simplicity, there is only one request code, 418
Where "Message" is anything the script wants to advertise
* REQUEST_PAGE: the format is [<page name>?<search string>]
The server only sends one such message "'''Teacup URL Changed'''", and ignores messages sent by other scripts using this format.
** this will be extended for POST pages, format is undecided at this time
:When this message is sent, The current Address of the Server is placed in the prims hover text, other scripts may use the following to retrieve it<source lang="lsl2">string vStrAddress = llList2String( llGetLinkPrimitiveParams( SERVER_LINK_NUMBER, [PRIM_TEXT] ), 0 );</source>
::The text will either be the servers URL, the text "'''No URL'''".
 
The second Outgoing Message is a file request and has the format
<source lang="lsl2">llMessageLinked( LINK_SET, TEACUP_MESSAGE, REQUEST_PAGE, REQUEST_KEY );</source>
* TEACUP_MESSAGE: '''418'''
* REQUEST_PAGE: the format is <nowiki>"<page name>?<search string>#ip=<decimal IP Address>&<post data>]</nowiki>
** Ex: "'''index.tsp?#ip=127.0.0.1&'''" ''<-- file has no search string or post data''
** the page name can be parsed with<source lang="lsl2">string vStrPageName = llList2String( llParseStringKeepNulls( REQUEST_PAGE, [], ["?","#"] ), 0 );</source>
* REQUEST_KEY: the return key for the requested data.
* REQUEST_KEY: the return key for the requested data.
** NULL_KEY and a page name of " Server Start" will be sent when the server file availability handler resets.
valid Server Requests can be detected by checking that REQUEST_KEY is a valid key, and that TEACUP_MESSAGE is 418.
 
==== Server Notes ====
* The server takes the site title from the Prim name it's in
* The hovertext of the prim the server is in will contain it's base address (invisibly)
* The Server is '''2''' scripts (Teacup & Saucer) and 2 default files (teacup.js & teacup.css)
** The default files require a File Service (Like [[Red Tea]]) to load
* The Server includes a quick 404 handler to prevent missing or unknown files from slowing down page loading. It accepts some special commands listed below in the "File Service Protocol: Advanced" section. Any unknown page received with a 200 code for a pending request will automatically be added to the known list.
^ [[User:Void Singer/Teacup#Return_to_Void_Singers_user_page|Return to top]]


=== File Service Protocol ===
==== Incoming Messages ====
----
----
==== Basics ====
The server expects it will receive a return message in the following format for any file request made...
File Services receive data via link messages, in the following manner
<source lang="lsl2">llMessageLinked( REQUEST_SOURCE, RESPONSE_CODE, FILE_TEXT, REQUEST_KEY ); //-- sent from the File Service</source>
<lsl>link_message( integer REQUEST_SOURCE, integer REQUEST_CODE, string REQUEST_PAGE, key REQUEST_KEY )</lsl>
* REQUEST_SOURCE: The link number of the Teacup server that sent the request
File Services should minimally check that REQUEST_CODE is 418 (file request), and that REQUEST_KEY is a valid key to confirm it's a valid server request.
* RESPONSE_CODE: the following standard HTTP Response codes are currently recognized
: REQUEST_PAGE can be parsed with <lsl>list vLstPage = llParseStringKeepNulls( REQUEST_PAGE, ["?"], [] ); //-- The page name will be contained in: llList2String( vLstPage, 0 )</lsl>
** '''100''' "Continue": The server ignores this, make sure you send a normal response code as a follow up (see [[Saucer]] for details)
If the page name is ''NOT'' a page that this File Service handles, ''it should do nothing''. Otherwise it should return it's data in the following format:
** '''200''' "Success": Basic "yes we have it, here you go". anything that returns data can return this
<lsl>llMessageLinked( REQUEST_SOURCE, RESPONSE_CODE, FILE_TEXT, REQUEST_KEY );</lsl>
** '''201''' "Created": File was created for this request. probably best if the file was created for the request
* REQUEST_SOURCE: the link number that the server request came from.
** '''202''' "Accepted": Request acknowledged/received (content optional) probably best for commands that generate in world actions
* RESPONSE_CODE: one of the following integer values (they are all normal HTTP RESPONSE CODES)
** '''204''' "No Content": We got the request/data, but don't need to return anything. probably best for form data, FILE_TEXT should be blank.
** 200 (Success: default value, can be used for anything that returns content)
** '''403''' "Forbidden": We got the request, but aren't allowed to serve it. Expansion space for per user access (unused as of this writing).
** 201 (Created: optional alternative, probably best if the file was created for the request)
** '''404''' "Not Found": The file does not exist. Avoid using this unless you are reasonably sure the file isn't being served from another script.
** 202 (Accepted: optional alternative, probably best for commands that generate in world actions)
** 204 (No Content: optional alternative, probably best for form data, FILE_TEXT should be blank)
* FILE_TEXT: text of the file that was requested.
* FILE_TEXT: text of the file that was requested.
* REQUEST_KEY: server request key for this file.
* REQUEST_KEY: server request key for this file.
: Any return should be done within 20 seconds or it's results will be ignored.
: Any return should be done within 20 seconds or it's results will be ignored (Mostly an LSL limitation)


==== Advanced ====
==== Special Ranges and limitations ====
There are two style in which a File System can behave. Passive, and Active. Active is preferred.
----
 
:To promote predictable data flows within a scripted object, The following are "Official" limits for scripts to be included as compatible resources
Active File System services should advertise each file as soon as it's available using
# The '''0xx''' Range is off limits and may not be used (for compatibility with scripts that may use low numbers)
: ''File Added'': Sent when file is available in the file system<lsl>llMessageLinked( LINK_SET, 22, "name of the file", NULL_KEY ); //-- key MUST be the constant NULL_KEY</lsl>
# All normal [http://en.wikipedia.org/wiki/List_of_HTTP_status_codes HTTP Response codes] and ranges ('''1xx-5xx''') are reserved... do not use them unless they make sense or the server can actually send them properly.
When a file is removed from the file system it should send
# the Range of 6xx codes is reserved for use by File System scripts, limited to no more than 10 per range per script and will be registered by request, first (working script) come, first served. if you reasonably need more than 10, use the 8xx-9xx range
: ''File Removed'':Sent when a file is removed from the file system<lsl>llMessageLinked( LINK_SET, -22, "name of the file", NULL_KEY ); //-- key MUST be the constant NULL_KEY</lsl>
#* the following '''6xx''' codes are are registered at this time
Additionally, if and Active File System receives the " Server Start" message (418 code, plus " Server Start" text, and NULL_KEY), it should resend "File Added" for each of the files still available, but no faster than 10/second for file system.
#** [[Saucer]]
: Alternatively, if the file system can respond to normal requests in under 2 seconds, any file that is sent with response code 200 will automatically be added, and those would not need to be sent.
#*** '''600''' "File Removed" (sent with a file name and NULL_KEY)
 
#*** '''601''' "File Added" (sent with a file name and NULL_KEY)
 
# '''7xx''' codes are reserved for future expansion
Passive File Systems do not need to advertise their available files, but if they receive a request that they might reasonably expect to take more than 2 seconds to fill, they should immediately send
# '''8xx-9xx''' are unregulated, use at your own risk
: '''File Exists (Continue)''': Sent to prevent a 404 message for a file from slow passive file system elements. <lsl>llMessageLinked( REQUEST_SOURCE, 100, "", REQUEST_KEY );</lsl>
# All Codes must be below 1000 (this is to guarantee safe data transfer for other unrelated scripts)
and then follow up with their normal response. the 20 second return limit is still in effect.
:To Promote Maximum Stability and Flexibility
: Passive systems should ''NOT'' use response code 200, or if they do, ''MUST'' send "File Removed" messages when the file is removed. Use codes 201, 202, and 204 instead.
# Any Script that resides in the server prim should expect link messages of up to 40KiB
#* File Service Scripts should attempt to send files 30KiB or smaller
# File Service Scripts should not broadcast any link message larger than 4KiB using [[LINK_THIS]]
#* Responses to requests should be targeted to the Server prim that requested the data for larger data sizes (optimally for ALL responses)
# Scripts residing outside of the server prim should expect link messages with up to 4KiB of data (the max the server is able to request with normally)
# {{HoverText|".tsp"|Teacup Server Page}} pages with inline scripts should avoid using the following variable/function names
#* v0, v1, v2, v3 - v9 (these variables are used to: wrap the page for transport, serve as a loading container for pages, handle timeout messages for non-loading pages, and the rest being reserved for future support)
#* u0, u1, u2, u3 - u9 (these functions handle: watching for {{HoverText|".tsp"|Teacup Server Page}} links to intercept, setting up the container for new {{HoverText|".tsp"|Teacup Server Page}} requests, loading the {{HoverText|".tsp"|Teacup Server Page}} files, and the rest being reserved for future support)
#** you can request a new page from javascript by calling '''u1('PageName.tsp');''', however you may want to include some random info in the search string if refreshing the same page
^ [[User:Void Singer/Teacup#Return_to_Void_Singers_user_page|Return to top]]
^ [[User:Void Singer/Teacup#Return_to_Void_Singers_user_page|Return to top]]


=== Teacup Server Page (".tsp") Format ===
=== Teacup Server Page (".tsp") Format ===
----
----
Teacup serves a modified html page called a Teacup Server Page (.tsp), to overcome limitations in the LSL HTTP-in behavior.
Teacup serves a modified html page called a Teacup Server Page (".tsp"), to overcome limitations in the LSL HTTP-in behavior.
: if a requested filename ends with ".tsp" it needs to conform to a specific format that is similar but not identical to the contents of a normal html webpage. To convert an html page into a tsp page, the follow actions must take place (an example of all of them may be found in the [[Red Tea]] file system.
: if a requested filename ends with {{HoverText|".tsp"|Teacup Server Page}} it needs to conform to a specific format that is similar but not identical to the contents of a normal html webpage. To convert an html page into a tsp page, the follow actions must take place (an example of all of them may be found in the [[User:Void_Singer/Red Tea|Red Tea]] File Service)
* The file name should end with ".tsp" (Teacup server page)
* The file name should end with {{HoverText|".tsp"|Teacup Server Page}}
* The contents are limited to what's valid ''inside'' a normal html "body" tag.
* The contents are limited to what's valid ''inside'' a normal html "body" tag.
* It also requires the following minor changes, made in order:
* It also requires the following minor changes, made in order:
*# all backslash characters must be converted to double backslashes (may be applied on a line by line basis)
*# all backslash characters must be converted to double backslashes (may be applied on a line by line basis)
*#* eg:<div style="font-family:monospace;font-size:12px;background-color:#EEE;">&nbsp;file_string <span style="color: rgb(102, 204, 102);">=</span> [[llDumpList2String|<span style="color: rgb(160, 0, 0); font-weight: bold; text-decoration: none;">llDumpList2String</span>]]<span style="color: rgb(102, 204, 102);">(</span> [[llParseStringKeepNulls|<span style="color: rgb(160, 0, 0); font-weight: bold; text-decoration: none;">llParseStringKeepNulls</span>]]<span style="color: rgb(102, 204, 102);">(</span> file_string, <span style="color: rgb(102, 204, 102);">[<span style="color: rgb(0, 160, 0);">"\\"</span>]</span>, <span style="color: rgb(102, 204, 102);">[] )</span>, <span style="color: rgb(0, 160, 0);">"\\\\"</span> <span style="color: rgb(102, 204, 102);">)</span>;</div>
*#* eg:<div style="font-family:monospace;font-size:12px;background-color:#EEE;">&nbsp;file_string <span style="color: rgb(102, 204, 102);">=</span> [[llDumpList2String|<span style="color: rgb(160, 0, 0); font-weight: bold; text-decoration: none;">llDumpList2String</span>]]<span style="color: rgb(102, 204, 102);">(</span> [[llParseStringKeepNulls|<span style="color: rgb(160, 0, 0); font-weight: bold; text-decoration: none;">llParseStringKeepNulls</span>]]<span style="color: rgb(102, 204, 102);">(</span> file_string, <span style="color: rgb(102, 204, 102);">[<span style="color: rgb(0, 160, 0);">"\\"</span>]</span>, <span style="color: rgb(102, 204, 102);">[] )</span>, <span style="color: rgb(0, 160, 0);">"\\\\"</span> <span style="color: rgb(102, 204, 102);">)</span>;</div>
*# all single quote characters must be prefixed with a backslash (may be applied on a line by line basis)
*# all single quote characters must be prefixed with a literal backslash (may be applied on a line by line basis)
*#* eg:<div style="font-family:monospace;font-size:12px;background-color:#EEE;">&nbsp;file_string <span style="color: rgb(102, 204, 102);">=</span> [[llDumpList2String|<span style="color: rgb(160, 0, 0); font-weight: bold; text-decoration: none;">llDumpList2String</span>]]<span style="color: rgb(102, 204, 102);">(</span> [[llParseStringKeepNulls|<span style="color: rgb(160, 0, 0); font-weight: bold; text-decoration: none;">llParseStringKeepNulls</span>]]<span style="color: rgb(102, 204, 102);">(</span> file_string, <span style="color: rgb(102, 204, 102);">[<span style="color: rgb(0, 160, 0);">"'"</span>]</span>, <span style="color: rgb(102, 204, 102);">[] )</span>, <span style="color: rgb(0, 160, 0);">"\\'"</span> <span style="color: rgb(102, 204, 102);">)</span>;</div>
*#* eg:<div style="font-family:monospace;font-size:12px;background-color:#EEE;">&nbsp;file_string <span style="color: rgb(102, 204, 102);">=</span> [[llDumpList2String|<span style="color: rgb(160, 0, 0); font-weight: bold; text-decoration: none;">llDumpList2String</span>]]<span style="color: rgb(102, 204, 102);">(</span> [[llParseStringKeepNulls|<span style="color: rgb(160, 0, 0); font-weight: bold; text-decoration: none;">llParseStringKeepNulls</span>]]<span style="color: rgb(102, 204, 102);">(</span> file_string, <span style="color: rgb(102, 204, 102);">[<span style="color: rgb(0, 160, 0);">"'"</span>]</span>, <span style="color: rgb(102, 204, 102);">[] )</span>, <span style="color: rgb(0, 160, 0);">"\\'"</span> <span style="color: rgb(102, 204, 102);">)</span>;</div>
*# all line breaks should be converted to "\n" literals (may be applied on a line by line basis)
*# all line breaks should be converted to "'''\n'''" literals (may be applied on a line by line basis)
*#* eg:<div style="font-family:monospace;font-size:12px;background-color:#EEE;">&nbsp;file_string <span style="color: rgb(102, 204, 102);">=</span> [[llDumpList2String|<span style="color: rgb(160, 0, 0); font-weight: bold; text-decoration: none;">llDumpList2String</span>]]<span style="color: rgb(102, 204, 102);">(</span> [[llParseStringKeepNulls|<span style="color: rgb(160, 0, 0); font-weight: bold; text-decoration: none;">llParseStringKeepNulls</span>]]<span style="color: rgb(102, 204, 102);">(</span> file_string, <span style="color: rgb(102, 204, 102);">[<span style="color: rgb(0, 160, 0);">"\n"</span>]</span>, <span style="color: rgb(102, 204, 102);">[] )</span>, <span style="color: rgb(0, 160, 0);">"\\n"</span> <span style="color: rgb(102, 204, 102);">)</span>;</div>
*#* eg:<div style="font-family:monospace;font-size:12px;background-color:#EEE;">&nbsp;file_string <span style="color: rgb(102, 204, 102);">=</span> [[llDumpList2String|<span style="color: rgb(160, 0, 0); font-weight: bold; text-decoration: none;">llDumpList2String</span>]]<span style="color: rgb(102, 204, 102);">(</span> [[llParseStringKeepNulls|<span style="color: rgb(160, 0, 0); font-weight: bold; text-decoration: none;">llParseStringKeepNulls</span>]]<span style="color: rgb(102, 204, 102);">(</span> file_string, <span style="color: rgb(102, 204, 102);">[<span style="color: rgb(0, 160, 0);">"\n"</span>]</span>, <span style="color: rgb(102, 204, 102);">[] )</span>, <span style="color: rgb(0, 160, 0);">"\\n"</span> <span style="color: rgb(102, 204, 102);">)</span>;</div>
*# The page should be prefixed with "vTea='" and suffixed with "';" (applies only to the whole page)
*# The page should be prefixed with "'''<nowiki>v0='</nowiki>''''" and suffixed with "'''<nowiki>';</nowiki>'''" (applies only to the whole page)
*#* eg:<div style="font-family:monospace;font-size:12px;background-color:#EEE;">&nbsp;file_string <span style="color: rgb(102, 204, 102);">=</span> <span style="color: rgb(0, 160, 0);">"vTea='"</span> <span style="color: rgb(102, 204, 102);">+</span> file_string <span style="color: rgb(102, 204, 102);">+</span> <span style="color: rgb(0, 160, 0);">"';"</span>;</div>
*#* eg:<div style="font-family:monospace;font-size:12px;background-color:#EEE;">&nbsp;file_string <span style="color: rgb(102, 204, 102);">=</span> <span style="color: rgb(0, 160, 0);">"v0='"</span> <span style="color: rgb(102, 204, 102);">+</span> file_string <span style="color: rgb(102, 204, 102);">+</span> <span style="color: rgb(0, 160, 0);">"';"</span>;</div>
:[[User:Void Singer/Teacup#Return_to_Void_Singers_user_page|Return to top]]
:[[User:Void Singer/Teacup#Return_to_Void_Singers_user_page|Return to top]]
}}
}}
Line 448: Line 323:
=== Compatible File Systems and Extensions ===
=== Compatible File Systems and Extensions ===
----
----
[[User:Void_Singer/Red_Tea|Red Tea]] - A very simple File Service System for a starting point.
* [[User:Void_Singer/Red_Tea|Red Tea]] - A very simple [[Server_In_a_Prim|SIP]] back end File Service for a starting point.
* [[User:Void_Singer/Region_Stats|Region Stats]] - A single page Extension that gets live data from the region and refreshes every minute
* [[User:Void_Singer/Saucer|Saucer]] - Optional Fast 404 Extension for preventing long timeouts for missing/bad pages
* [[User:Void_Singer/Tea_Strainer|Tea Strainer]] - Optional Troubleshooting Monitor for checking messages being sent and received.
* [[User:Void_Singer/To_Go_Cup|To Go Cup]] - Experimental Loader for Internal Browsers on v1x viewers (v1.23, Snowglobe, Cool, Phoenix, Imprudence, Ascent, Singularity, and others without {{HoverText|MOAP|Media On A Prim}} support)


=== Known Bugs ===
=== Known Bugs ===
----
----
* inline script/style elements are not evaluated at load time (inline attributes should work normally)
* inline style ''elements'' are not evaluated at load time (inline ''attributes'' should work normally)
** images have their own events, and can be used to trigger page load javascript
** using JavaScript to write these is a viable workaround at the moment
* document/body onload events are not triggered for .tsp pages
* document/body onload events are not triggered for page loads
** images have their own events, and can be used to trigger page load javascript
** images have their own events, and can be used to trigger page load JavaScript
* Fails to load on external browsers (jira pending)
** may not support this now that inline scripts work, but it's still under consideration
** This is a viewer problem right now, some of the internal browsers will load it
* Fails to load directly to external browsers ([http://jira.secondlife.com/browse/VWR-25555 VWR-25555])
*** Phoenix will not load it in the internal browser, because they limit the webkit address field to 255 characters, I'm going to see if I can't work around this with cramped formatting, or get the phoenix devs to work on it
** v2 internal browsers will only load it from the shared media bar "Load URL in browser" button ([http://jira.secondlife.com/browse/VWR-25554 VWR-25554])
*** v2 viewers should load the index page fine to the internal browser. if you copy the address and paste it into an external browser it will work from there
*** Workaround for v2 is to load it via the shared media button, to the internal browser, then cut and paste into an external browser (should work with everything but IE)
**** confirmed on Firefox 3.6, unknown on any others at this time.
* POST from forms is wonky, it forces a page load, which we can only serve text to.
** There isn't any way via JavaScript to intecept form POST data, nor a way to call it from the container we use
** It may be possible to rework the server to use Frames and detect plain text loads of pages... will look into this.
* normal onLoad event for the pages scripts are unsupported
** unfortunately the webkit browser is stupid and doesn't obey async/defer script attributes so we have to use onload for the main page
** fortunately, scripts will get refreshed in page order, so just calling the code is a viable alternative


=== Requested Feature Upgrades ===
=== Requested Feature Upgrades ===
----
----
* Add handling for POST action
* see about faking support for defer/async behavior in the tsp inline script tags
** ''Accepted'': would like feedback on how to handle this internally though.
** this will require supporting page onLoad events
* Add support per page javascript and css
* Trigger at least the normal load events manually
* Find a simple way to serve base64 encoded content such as images or sounds.
* Find a simple way to serve base64 encoded content such as images or sounds.
** '''NEED ASSISTANCE''': I can (probably) do it the same way we load pages, but this makes it hard for page writers.
** '''NEED ASSISTANCE''': I can (probably) do it the same way we load pages, but this makes it hard for page writers.
* Find a convenient way to set title on per page basis... probably use the page name
** considering a double-tap method where the server js library parses img tags for failures and bootstraps them with a modified name
** ''Accepted'': Page titles should match the internal file name minus the ".tsp" extension
** may be able to partially support this via css, but it's ugly for page writers =(


=== Change Log / Old Versions ===
=== Change Log / Old Versions ===
----
----
Most Recent Changes are at the top, old version links below.
Most Recent Changes are at the top, old version links below.
* [[User:Void_Singer/Teacup|Teacup/Saucer v0.3]]
* Code will be considered stable when it reaches 1.0
* [[User:Void_Singer/Teacup|Teacup v0.5]]
** Added support for inline script elements for .tsp files
** Added IP Address to File Service Requests, to work towards authentication
** Tweaked the teacup.js to run a bit faster, and condensed it to take a little less space.
** Added Page Titles (matches the file name minus the {{HoverText|".tsp"|Teacup Server Page}} extension (only visible in external browsers)
** Removed default CSS, this should be loadable per page now by JavaScript if nothing else.
* [http://wiki.secondlife.com/w/index.php?title=User:Void_Singer/Teacup&oldid=1141627 Teacup v0.3.1]
** Reabsorbed the bootstrap html page into this script and limited it's size for compatibility due to feedback
** Moved Saucer to it's own page, as an option resource
** Removed dead touch code due to incompatibility with llLoadURL ([http://jira.secondlife.com/browse/VWR-25554 VWR-25554] and [http://jira.secondlife.com/browse/VWR-25555 VWR-25555])
** Added handling for POST data. Page request format should be stable now.
* [http://wiki.secondlife.com/w/index.php?title=User:Void_Singer/Teacup&oldid=1141137 Teacup/Saucer v0.3]
** Server Test Page moved to saucer file availability handler
** Server Test Page moved to saucer file availability handler
** Server javascript page loader library (Teacup.js) moved to File Service System
** Server JavaScript page loader library (Teacup.js) moved to File Service System
*** Users should have less trouble editing the file now and can include their own functions in the same file
*** Users should have less trouble editing the file now and can include their own functions in the same file
** Sitewide CSS supported via Teacup.css
** Sitewide CSS supported via "teacup.css"
** Saucer Script now handles page availability for quick 404 returns to speed page loading.
** Saucer Script now handles page availability for quick 404 returns to speed page loading.
** Site Title is pulled from the object name
** Site Title is pulled from the object name
** Site address is discoverable by object scripts in the (hidden) prim hovertext
** Site address is discoverable by object scripts in the (hidden) prim hovertext
** Server now runs from any prim, not just the root.
** Server now runs from any prim, not just the root.
* [https://wiki.secondlife.com/w/index.php?title=User:Void_Singer/Teacup&oldid=1140984|Teacup v0.2]
* [http://wiki.secondlife.com/w/index.php?title=User:Void_Singer/Teacup&oldid=1140984 Teacup v0.2]
** Initial Public Release
** Initial Public Release


Latest revision as of 14:57, 22 January 2015

Teacup

Teacup/Saucer
What is it?

Teacup is an open source webserver front end for LSL's HTTP-in + MOAP functionality. It builds on the work of several other people including but not limited to, Kelly Linden, Torley Linden, Tali Rosca, Vegas Silverweb, and special mentions to Kate and/or Edelman Linden. The idea is to make it easy to serve web content from within SL, with a minimum of work or understanding, in the most standards compliant and flexible way possible.

How does it work?

Externally, when Teacup starts, it gets a URL and creates a Micro HTML page, which it bootstraps onto the prim face with a "data:" URN. Once loaded, that page requests a JavaScript library, which loads normally. Once loaded, the library bootstraps the specially prepared ".tsp" HTML content onto the current page, and captures all links targeting other ".tsp" files, so that it can do the same when they are requested. Internally the server broadcasts a message when it gets a page request, and any installed File Service scripts can reply with content, or the server will simply report back that it doesn't have the file requested if it doesn't receive a reply in a set time.

Why all the tea jokes?

Well I happen to like steam punk stuff, and it has a sort of pseudo-Victorian-era feel to it, but in all truth it was sparked by a bit of geek humor. There was an old april fool's joke passed around as an official sounding memo about creating a protocol for controlling coffee pots with HTTP (back before they actually started making net enabled appliances) and part of that proposal was that teapots should return an error response 418 "I'm a teapot" if you tried to make it brew coffee... since these servers are small, and 418 is safe to use internally because it wouldn't normally be encountered, I figured hey, Teapot --> Teacup --> Victorian Imagery --> Steam Punk --> teacup that is it's own teapot --> SIP --> many different types of tea --> Success!

... And thus was born the SIP, Teacup server, and Red Tea File Service
(developers are encouraged to keep the theme, but it's not a requirement)

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Quick Start

So you don't want to read a bunch of tech babble, you just want to make a website in a prim right? Well I can sympathize so here are some (mostly) easy steps to get you up and running fast...

  1. Follow the instructions on This Page or choose a File Service from the Compatible File Services and Extensions and follow those instructions.
  2. Optional: Copy the text in the grey box below Code: Region Stats into a script named "Region Stats", save it, and drop it into your rezzed box.
  3. Optional: Copy the text in the grey box below Code: Saucer into a script named "Saucer", save it, and drop it in your rezzed box.
  4. Optional: Copy the text in the grey box below Code: Tea Strainer into a script named "Tea_Strainer", save it, and drop it in your rezzed box.
  5. Copy the text in the grey box below Code: Teacup into a script named "Teacup v0.5", save it, and drop it in your rezzed box.
  6. Click on the top of your box if your webpage isn't already showing.
    • At this point you may want to rotate and/or resize your box.
    • If you like, you have my express permission to download (right click, "save as") and edit (with whichever image editor you prefer) the Teacup.png file to use as the default texture of your website prim.
  7. Show it off to your friends with MOAP enabled viewers.


If you run into any problems, simply start a thread with the problem you are having here, and I or some other technical wizard will assist you.

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Code

Teacup

  • Save in a MONO script named "Teacup v0.5"
/*( Teacup Server v0.5 )*/


 /*//-- Teacup Boot Strap Variables --//*/
 //-- Server Default page start (always loads)
string  gStrTBS1xx = "data:text/html;charset:utf-8,<html>\n";
 //-- Head Section start: loads with URL_REQUEST_GRANTED
string  gStrTBS1a1 = "	<head>\n		<base href='";
 //-- Head Section end & Address intsertion point: loads with URL_REQUEST_GRANTED
string  gStrTBS1a2 = "'/>\n		<script type='text/javascript' defer='' src='teacup.js'></script>\n	</head>\n";
 //-- Server Default message (always loads)
string  gStrTBS2xx = "	<body>\n		<h1>Teacup Server</h1>\n		<hr/>\n		<h2>If you are reading this, the <em>server</em> is working</h2>\n";
 //-- Default Error message: loads with URL_REQUEST_GRANTED
string  gStrTBS2a1 = "		<h3>(But the File Service may not be)</h3>\n";
 //-- URL Failure MessageL included for URL_REQUEST_DENIED
string  gStrTBS2b1 = "		<h3>(But the region failed to provide a URL)</h3>\n";
 //-- Server Default Footer start (always loads)
string  gStrTBS3xx = "		<hr/>\n		<p>Teacup/Saucer v0.3<br/><a href='secondlife:///app/agent/";
 //-- Server Default Footer end & Contact Owner key insertion point (always loads)
string  gStrTBS4xx = "/about'>Contact Owner?</a></p>\n	</body>\n</html>";

 /*//-- Pending Request Variables --//*/
list    gLstPndKey; //-- Key queue (pages waiting to be served)
list    gLstPndTim; //-- Timeout Value queue (Request Timeout)
//-- These (hopefully) prevent multiple responses if SL sends a timeout.


default{
	state_entry(){ //-- Request URL on start up
		llRequestURL();
	}
	
	on_rez( integer vIntBgn ){ //-- Clear pending and request new URL on rez
		gLstPndKey = gLstPndTim = [];
		llRequestURL();
	}
	
	changed( integer vBitChg ){ //-- Clear pending and re-request URL on region change/restart
		if ((CHANGED_REGION_START | CHANGED_REGION) & vBitChg){
			gLstPndKey = gLstPndTim = []; //-- Consider sending custom 404's or 205's here instead
			llRequestURL();
		}
	}
	
	http_request( key vKeySrc, string vStrMth, string vStrBdy ){
		integer vIntMth = llListFindList( [URL_REQUEST_DENIED, URL_REQUEST_GRANTED, "POST", "GET"], [vStrMth] );
		if (4 & vIntMth){
			//-- trap unused here, check we hasve a valid non root file name on the next line
		}else if (2 & vIntMth){ if (vStrMth = llUnescapeURL( llDeleteSubString( llGetHTTPHeader( vKeySrc, "x-path-info" ), 0, 0 ) )){
			llMessageLinked( LINK_SET,
			                 418,
			                 vStrMth + "?" + llGetHTTPHeader( vKeySrc, "x-query-string" ) +
			                 "#ip=" + llGetHTTPHeader( vKeySrc, "x-remote-ip" ) + "&" + vStrBdy,
			                 vKeySrc );
			if (gLstPndTim == []){
				llSetTimerEvent( 3.0 );
			}
			gLstPndKey += [vKeySrc];
			gLstPndTim += [llGetUnixTime() + 20];
		}//-- can handle root requests here later if we want
		}else{ //-- URL request response: set hover text, push proper page format to prim face
			if (vIntMth || llList2String( llGetPrimitiveParams( [PRIM_TEXT] ), 0 ) != "No URL"){
				llSetPrimitiveParams( [PRIM_TEXT, llList2String( ["No URL", (vStrBdy += "/")], vIntMth ), <(float)(!vIntMth), 0.5, 0.5>, 0.0] );
				vStrBdy = gStrTBS1xx + llList2String( ["", gStrTBS1a1 + vStrBdy + gStrTBS1a2], vIntMth ) + gStrTBS2xx +
				  llList2String( [gStrTBS2a1, gStrTBS2a1], vIntMth ) + gStrTBS3xx + (string)llGetOwner() + gStrTBS4xx;
				llSetPrimMediaParams( 0, [PRIM_MEDIA_HOME_URL, vStrBdy, PRIM_MEDIA_CURRENT_URL, vStrBdy] );
				llMessageLinked( LINK_SET, 418, "Teacup URL changed", NULL_KEY );
			} //-- Next Line: abuse Sensor Repeat to retry on no URL in 5 mins
			llSensorRepeat( "", llGetKey(), AGENT, 0.0001 * !vIntMth, PI, 300.0 * !vIntMth );
		}
	}
	
	link_message( integer vIntSrc, integer vIntDta, string vStrDta, key vKeyDta ){
		if (~vIntSrc = llListFindList( [200, 201, 202, 204, 403, 404], [vIntDta] )){ //-- valid return code?
			if (~vIntSrc = llListFindList( gLstPndKey, [vKeyDta] )){ //-- request still pending?
				llHTTPResponse( vKeyDta, vIntDta, vStrDta ); //-- Serve request & remove from pending queue
				gLstPndKey = llDeleteSubList( gLstPndKey, vIntSrc, vIntSrc );
				gLstPndTim = llDeleteSubList( gLstPndTim, vIntSrc, vIntSrc );
			}
		}
	}
	
	timer(){ //-- Optimally, runs once on an empty list for 3sec worth requests
		if (gLstPndTim != []){ //-- Pending requests?
			while (llList2Integer( gLstPndTim, 0 ) < llGetUnixTime()){ //-- are any expired?
				gLstPndTim = llDeleteSubList( gLstPndTim, 0, 0 ); //-- remove expired
				gLstPndKey = llDeleteSubList( gLstPndKey, 0, 0 );
				if (gLstPndTim == []){ //-- Pending Queue empty?
					llSetTimerEvent( 0.0 ); //-- Stop timer, and exit
					return;
				}
			}
		}else{ //-- No pending requests, turn off the timer
			llSetTimerEvent( 0.0 );
		}
	}
	
	sensor( integer vIntNul ){
		//-- Dummy Sensor event required by SCR-53
	}
	
	no_sensor(){ //-- URL re-request 5 mins after failure
		llSensorRemove();
		llRequestURL();
	}
}
/*//--                           License Text                           --//*/
/*//  Free to copy, use, modify, distribute, or sell, with attribution.   //*/
/*//    (C)2011 (CC-BY) [ http://creativecommons.org/licenses/by/3.0 ]    //*/
/*//   Void Singer [ https://wiki.secondlife.com/wiki/User:Void_Singer ]  //*/
/*//  All usages must contain a plain text copy of the previous 2 lines.  //*/
/*//--                                                                  --//*/

^ Return to top

teacup.js

  • Red Tea expects this file saved in a notecard named "teacup.js"
  • Other File systems may have different expectations for loading plain text files; Consult their documentation for details.
/*  teacup.js v0.5 <!-- */

var u0=function(){//-- faster!
	if(window.addEventListener){
		return function(l0,l1,l2){
			l0.addEventListener(l1,l2,false);
		};
	}else if(window.attachEvent){
		return function(l0,l1,l2){
			l0.attachEvent('on'+l1,l2);
		};
	}
}();

function u1(l0){
	if (l0.preventDefault){
		l0.preventDefault();
	}//-- cross-compat?
	v1=document.createElement('script');
	document.head.appendChild(v1);
	u0(v1,'load',u2);//-- no 'type' breaks standards
	v1.src=(typeof(this.href)!='undefined')?this.href:l0;
	v2=setTimeout('u2(\'504 Gateway Timeout or 404 Not Found\')',23000);
}
//-- v0,v1,v2 exist here
function u2(l0){//-- Achtung Baby!
	clearTimeout(v2);
	if(typeof(v0)=='undefined'){
		if (typeof(l0)!='object'){
			alert(l0+'\n'+v1.src.substring(81)+'\n');
		}//-- catches timeouts, send js to alert others
	}else{
		document.body.innerHTML=v0;
		for(var l1=0;l1<document.links.length;l1++){
			if (~document.links[l1].href.indexOf('.tsp')){
				u0(document.links[l1],'click',u1);
			}
		}//-- the double split seemed more effective than the regex
		document.title=decodeURI(v1.src.split(document.head.getElementsByTagName('base')[0].href)[1].split('.tsp')[0]);
		var l2;
		v2=document.body.getElementsByTagName('script');
		for(l1=0;l1<v2.length;l1++){
			l2=document.createElement('script');
			if(~v2[l1].src.indexOf('.js')){
				l2.src=v2[l1].src;//-- no 'type' breaks standards
			}else if(v2[l1].childNodes.length){
				l2.appendChild(v2[l1].childNodes[0]);
			}
			v2[l1].parentNode.replaceChild(l2,v2[l1]);
		}//-- extend script jumpstarter to link/css?
	}//-- next line: clean up; aisle 2
	document.head.removeChild(v1);
	v0=v1=v2=(function(){})();
}//-- like that evil 'undefined' hack?

window.onload=function(){//-- webkit is stupid and doesn't obey script tag defer/async attributes
	document.head=document.head||document.getElementsByTagName('head')[0];
	document.body=document.body||document.getElementsByTagName('body')[0];
	u1('index.tsp');//-- default page name
};

/* -->
  (C)2011 (CC-BY) [ http://creativecommons.org/licenses/by/3.0 ]
 Void Singer [ https://wiki.secondlife.com/wiki/User:Void_Singer ] */

NOTE: I recommend removing all the comments to make the file smaller (anything starting with //-- to the end of the line)

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Protocols

This section is not required reading for users, it is really only of use to scripters looking understand or extend it.

Server Protocols

Outgoing Messages

The server has only two outgoing message formats. The first is general advertisement, and can be used by any File Service or extension to advertise information about itself. 

llMessageLinked( LINK_SET, TEACUP_MESSAGE, "Message", NULL_KEY );

Where "Message" is anything the script wants to advertise The server only sends one such message "Teacup URL Changed", and ignores messages sent by other scripts using this format.

When this message is sent, The current Address of the Server is placed in the prims hover text, other scripts may use the following to retrieve it
string vStrAddress = llList2String( llGetLinkPrimitiveParams( SERVER_LINK_NUMBER, [PRIM_TEXT] ), 0 );
The text will either be the servers URL, the text "No URL".

The second Outgoing Message is a file request and has the format 

llMessageLinked( LINK_SET, TEACUP_MESSAGE, REQUEST_PAGE, REQUEST_KEY );
  • TEACUP_MESSAGE: 418
  • REQUEST_PAGE: the format is "<page name>?<search string>#ip=<decimal IP Address>&<post data>]
    • Ex: "index.tsp?#ip=127.0.0.1&" <-- file has no search string or post data
    • the page name can be parsed with
      string vStrPageName = llList2String( llParseStringKeepNulls( REQUEST_PAGE, [], ["?","#"] ), 0 );
  • REQUEST_KEY: the return key for the requested data.

valid Server Requests can be detected by checking that REQUEST_KEY is a valid key, and that TEACUP_MESSAGE is 418.

Incoming Messages

The server expects it will receive a return message in the following format for any file request made... 

llMessageLinked( REQUEST_SOURCE, RESPONSE_CODE, FILE_TEXT, REQUEST_KEY ); //-- sent from the File Service
  • REQUEST_SOURCE: The link number of the Teacup server that sent the request
  • RESPONSE_CODE: the following standard HTTP Response codes are currently recognized
    • 100 "Continue": The server ignores this, make sure you send a normal response code as a follow up (see Saucer for details)
    • 200 "Success": Basic "yes we have it, here you go". anything that returns data can return this
    • 201 "Created": File was created for this request. probably best if the file was created for the request
    • 202 "Accepted": Request acknowledged/received (content optional) probably best for commands that generate in world actions
    • 204 "No Content": We got the request/data, but don't need to return anything. probably best for form data, FILE_TEXT should be blank.
    • 403 "Forbidden": We got the request, but aren't allowed to serve it. Expansion space for per user access (unused as of this writing).
    • 404 "Not Found": The file does not exist. Avoid using this unless you are reasonably sure the file isn't being served from another script.
  • FILE_TEXT: text of the file that was requested.
  • REQUEST_KEY: server request key for this file.
Any return should be done within 20 seconds or it's results will be ignored (Mostly an LSL limitation)

Special Ranges and limitations

To promote predictable data flows within a scripted object, The following are "Official" limits for scripts to be included as compatible resources
  1. The 0xx Range is off limits and may not be used (for compatibility with scripts that may use low numbers)
  2. All normal HTTP Response codes and ranges (1xx-5xx) are reserved... do not use them unless they make sense or the server can actually send them properly.
  3. the Range of 6xx codes is reserved for use by File System scripts, limited to no more than 10 per range per script and will be registered by request, first (working script) come, first served. if you reasonably need more than 10, use the 8xx-9xx range
    • the following 6xx codes are are registered at this time
      • Saucer
        • 600 "File Removed" (sent with a file name and NULL_KEY)
        • 601 "File Added" (sent with a file name and NULL_KEY)
  4. 7xx codes are reserved for future expansion
  5. 8xx-9xx are unregulated, use at your own risk
  6. All Codes must be below 1000 (this is to guarantee safe data transfer for other unrelated scripts)
To Promote Maximum Stability and Flexibility
  1. Any Script that resides in the server prim should expect link messages of up to 40KiB
    • File Service Scripts should attempt to send files 30KiB or smaller
  2. File Service Scripts should not broadcast any link message larger than 4KiB using LINK_THIS
    • Responses to requests should be targeted to the Server prim that requested the data for larger data sizes (optimally for ALL responses)
  3. Scripts residing outside of the server prim should expect link messages with up to 4KiB of data (the max the server is able to request with normally)
  4. ".tsp" pages with inline scripts should avoid using the following variable/function names
    • v0, v1, v2, v3 - v9 (these variables are used to: wrap the page for transport, serve as a loading container for pages, handle timeout messages for non-loading pages, and the rest being reserved for future support)
    • u0, u1, u2, u3 - u9 (these functions handle: watching for ".tsp" links to intercept, setting up the container for new ".tsp" requests, loading the ".tsp" files, and the rest being reserved for future support)
      • you can request a new page from javascript by calling u1('PageName.tsp');, however you may want to include some random info in the search string if refreshing the same page

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Teacup Server Page (".tsp") Format

Teacup serves a modified html page called a Teacup Server Page (".tsp"), to overcome limitations in the LSL HTTP-in behavior.

if a requested filename ends with ".tsp" it needs to conform to a specific format that is similar but not identical to the contents of a normal html webpage. To convert an html page into a tsp page, the follow actions must take place (an example of all of them may be found in the Red Tea File Service)
  • The file name should end with ".tsp"
  • The contents are limited to what's valid inside a normal html "body" tag.
  • It also requires the following minor changes, made in order:
    1. all backslash characters must be converted to double backslashes (may be applied on a line by line basis)
    2. all single quote characters must be prefixed with a literal backslash (may be applied on a line by line basis)
    3. all line breaks should be converted to "\n" literals (may be applied on a line by line basis)
    4. The page should be prefixed with "v0=''" and suffixed with "';" (applies only to the whole page)
      • eg:
         file_string = "v0='" + file_string + "';";
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Notes

Compatible File Systems and Extensions

  • Red Tea - A very simple SIP back end File Service for a starting point.
  • Region Stats - A single page Extension that gets live data from the region and refreshes every minute
  • Saucer - Optional Fast 404 Extension for preventing long timeouts for missing/bad pages
  • Tea Strainer - Optional Troubleshooting Monitor for checking messages being sent and received.
  • To Go Cup - Experimental Loader for Internal Browsers on v1x viewers (v1.23, Snowglobe, Cool, Phoenix, Imprudence, Ascent, Singularity, and others without MOAP support)

Known Bugs

  • inline style elements are not evaluated at load time (inline attributes should work normally)
    • using JavaScript to write these is a viable workaround at the moment
  • document/body onload events are not triggered for page loads
    • images have their own events, and can be used to trigger page load JavaScript
    • may not support this now that inline scripts work, but it's still under consideration
  • Fails to load directly to external browsers (VWR-25555)
    • v2 internal browsers will only load it from the shared media bar "Load URL in browser" button (VWR-25554)
      • Workaround for v2 is to load it via the shared media button, to the internal browser, then cut and paste into an external browser (should work with everything but IE)
  • POST from forms is wonky, it forces a page load, which we can only serve text to.
    • There isn't any way via JavaScript to intecept form POST data, nor a way to call it from the container we use
    • It may be possible to rework the server to use Frames and detect plain text loads of pages... will look into this.
  • normal onLoad event for the pages scripts are unsupported
    • unfortunately the webkit browser is stupid and doesn't obey async/defer script attributes so we have to use onload for the main page
    • fortunately, scripts will get refreshed in page order, so just calling the code is a viable alternative

Requested Feature Upgrades

  • see about faking support for defer/async behavior in the tsp inline script tags
    • this will require supporting page onLoad events
  • Find a simple way to serve base64 encoded content such as images or sounds.
    • NEED ASSISTANCE: I can (probably) do it the same way we load pages, but this makes it hard for page writers.
    • considering a double-tap method where the server js library parses img tags for failures and bootstraps them with a modified name
    • may be able to partially support this via css, but it's ugly for page writers =(

Change Log / Old Versions

Most Recent Changes are at the top, old version links below.

  • Code will be considered stable when it reaches 1.0
  • Teacup v0.5
    • Added support for inline script elements for .tsp files
    • Added IP Address to File Service Requests, to work towards authentication
    • Tweaked the teacup.js to run a bit faster, and condensed it to take a little less space.
    • Added Page Titles (matches the file name minus the ".tsp" extension (only visible in external browsers)
    • Removed default CSS, this should be loadable per page now by JavaScript if nothing else.
  • Teacup v0.3.1
    • Reabsorbed the bootstrap html page into this script and limited it's size for compatibility due to feedback
    • Moved Saucer to it's own page, as an option resource
    • Removed dead touch code due to incompatibility with llLoadURL (VWR-25554 and VWR-25555)
    • Added handling for POST data. Page request format should be stable now.
  • Teacup/Saucer v0.3
    • Server Test Page moved to saucer file availability handler
    • Server JavaScript page loader library (Teacup.js) moved to File Service System
      • Users should have less trouble editing the file now and can include their own functions in the same file
    • Sitewide CSS supported via "teacup.css"
    • Saucer Script now handles page availability for quick 404 returns to speed page loading.
    • Site Title is pulled from the object name
    • Site address is discoverable by object scripts in the (hidden) prim hovertext
    • Server now runs from any prim, not just the root.
  • Teacup v0.2
    • Initial Public Release

NOTE TO WIKI EDITORS

I have kept this page as a sub page of my user page to denote that it should NOT be edited except to correct errors, add confirmed bugs, or add related resources.
The intent is to ensure executive control is in one person's hands to retain a cohesive vision of it's development.
If you have an improvement suggestion, or request, please use the discussion page.

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Questions or Comments?

Feel free to leave me a note on the discussion page.
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