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https://issues.apache.org/jira/browse/TAP5-1405?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13720185#comment-13720185
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Paul Stanton commented on TAP5-1405:
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does it handle encoding context parameters?
> XHR requests should be easily callable from javascript and not rely on a zone
> -----------------------------------------------------------------------------
>
> Key: TAP5-1405
> URL: https://issues.apache.org/jira/browse/TAP5-1405
> Project: Tapestry 5
> Issue Type: Improvement
> Components: tapestry-core
> Affects Versions: 5.2
> Reporter: Paul Stanton
> Assignee: Howard M. Lewis Ship
> Fix For: 5.4
>
>
> I quite often needed to initialise an XHR request-response from javascript. I
> think it would be a very useful feature for tapestry to expose to it's users.
> The ideal solution would
> 1. not require a zone for wiring (see #TAP5-1404)
> 2. encode context parameters as per server side
> EG
> I ended up writing a function to facilitate this. It handles:
> 1. the zone wiring
> 2. context parameters (unfortunately does not properly conform to encoding
> rules as per server side generated params)
> 3. query strings (sometimes useful)
> 4. url based session ids (for when cookies are disabled)
> note that the url is usually generated at the server side via
> ComponentResources.createEventLink.
> function multiZoneUpdate(url, params, zoneId)
> {
> // wire up zone, use dummy if none supplied
> if (typeof(zoneId) == "undefined")
> zoneId = "dummyZone";
> var zoneObject = Tapestry.findZoneManagerForZone(zoneId);
> if (!zoneObject)
> throw "unknown zone: " + zoneId;
> // context params must be an array
> if (!(params instanceof Array))
> params = [params];
> // include query string if supplied
> var qs = "";
> var qsInd = url.indexOf("?");
> if (qsInd != -1)
> {
> qs = url.substring(qsInd);
> url = url.substring(0, qsInd);
> }
> // include jsessionid if exists
> var jsId = "";
> var jsInd = url.indexOf(";");
> if (jsInd != -1)
> {
> jsId = url.substring(jsInd);
> url = url.substring(0, jsInd);
> }
> // build url
> if (params != null)
> for (var p = 0; p < params.length; p++)
> url += "/" + params[p];
> // request
> zoneObject.updateFromURL(url + jsId + qs);
> }
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