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Use JSON-P in gf-server-jsapi.js

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bjorn
2008-10-17 11:14:46 +00:00
parent 3df821efd7
commit 0eaef4a5b5
1 changed files with 32 additions and 2 deletions
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34
src/server/gf-server-jsapi.js
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@@ -26,11 +26,41 @@ gf.callFunction = function (fun, args, callback) {
var query = "";
for (var i in args) {
query += (query == "") ? "?" : "&";
query += i + "=" + escape(args[i]);
query += i + "=" + encodeURIComponent(args[i]);
}
gf.httpGetText(pgf_base_url + "/" + fun + query, function (output) { callback(gf.readJSON(output)); });
var url = pgf_base_url + "/" + fun + query;
// FIXME: if same domain, use gf.httpGetText
gf.httpGetJSONP(url, callback);
}
gf.httpGetJSONP = function (url, callback) {
var script = document.createElement("script");
if (!window.jsonCallbacks) {
window.jsonCallbacks = new Array();
}
var callbackIndex = window.jsonCallbacks.length;
window.jsonCallbacks.push(function (output) {
document.getElementsByTagName("head")[0].removeChild(script);
callback(output);
window.jsonCallbacks[callbackIndex] = null; // let the function be garbage-collected
// FIXME: there will be lots of nulls in that array, we should purge it
});
var callbackName = "jsonCallbacks[" + callbackIndex + "]";
var questionMarkPos = url.indexOf("?");
if (questionMarkPos > -1) {
url += (questionMarkPos < url.length-1) ? "&" : "";
} else {
url += "?";
}
url += "jsonp=" + callbackName;
script.setAttribute("src", url);
script.setAttribute("type", "text/javascript");
document.getElementsByTagName("head")[0].appendChild(script);
};
gf.httpGetText = function (url, callback) {
var XMLHttpRequestObject = false;