310
311
if (("path" in obj) && obj.path != null)
312
313
var path = urlencode_path(obj.path.toString());
313
if (url.length > 0 && path.length > 0 && path[0] != "/")
314
if (url.length > 0 && path.length > 0 && path.charAt(0) != "/")
314
315
path = "/" + path;
345
/** Writes a JSONable object to the cookie under a particular key
346
* (JSON encoded and URL encoded).
348
function write_cookie(key, value)
350
var sendstr = encodeURIComponent(key) + "="
351
+ encodeURIComponent(JSON.stringify(value))
352
+ "; path=" + urlencode_path(root_dir);
353
/* This actually just assigns to the key, not replacing the whole cookie
354
* as it appears to. */
355
document.cookie = sendstr;
357
/** Reads a cookie which has a JSONable object encoded as its value.
358
* Returns the object, parsed from JSON.
360
function read_cookie(key)
362
var cookies = document.cookie.split(";");
363
var checkstart = encodeURIComponent(key) + "=";
364
var checklen = checkstart.length;
365
for (var i=0; i<cookies.length; i++)
367
var cookie = cookies[i];
368
while (cookie[0] == ' ')
369
cookie = cookie.substr(1);
370
if (cookie.substr(0, checklen) == checkstart)
372
var valstr = cookie.substr(checklen);
373
valstr = decodeURIComponent(valstr);
374
return JSON.parse(valstr);
344
379
/** Given an argument map, as output in the args parameter of the return of
345
380
* parseurl, gets the first occurence of an argument in the URL string.
346
381
* If the argument was not found, returns null.
456
491
function pathlist_to_path(pathlist)
458
493
ret = path_join.apply(null, pathlist);
459
if (ret[ret.length-1] != '/')
494
if (ret.charAt(ret.length-1) != '/')
477
512
return make_path(path_join.apply(null, arguments));
515
/** Generates an absolute URL to a public application
517
function public_app_path(app /*,...*/)
519
return location.protocol + "//" + public_host
520
+ make_path(path_join.apply(null, arguments));
480
523
/** Given a path, gets the "basename" (the last path segment).
482
525
function path_basename(path)
519
562
arr.splice(j, i-j);
522
/** Makes an XMLHttpRequest call to the server. Waits (synchronously) for a
523
* response, and returns an XMLHttpRequest object containing the completed
565
/** Shallow-clones an object */
566
function shallow_clone_object(obj)
574
/** Returns a new XMLHttpRequest object, in a somewhat browser-agnostic
577
function new_xmlhttprequest()
582
return new XMLHttpRequest();
586
/* Internet Explorer */
589
return new ActiveXObject("Msxml2.XMLHTTP");
595
return new ActiveXObject("Microsoft.XMLHTTP");
599
throw("Your browser does not support AJAX. "
600
+ "IVLE requires a modern browser.");
606
/** Creates a random string of length length,
607
* consisting of alphanumeric characters.
609
var rand_chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZ"
610
+ "abcdefghiklmnopqrstuvwxyz";
611
function random_string(length)
613
var str = Array(length);
615
for (var i=0; i<length; i++)
617
v = Math.floor(Math.random() * rand_chars.length);
618
str[i] = rand_chars.charAt(v);
623
/** Makes an asynchronous XMLHttpRequest call to the server.
624
* Sends the XMLHttpRequest object containing the completed response to a
625
* specified callback function.
627
* \param callback A callback function. Will be called when the response is
628
* complete. Passed 1 parameter, an XMLHttpRequest object containing the
629
* completed response.
526
630
* \param app IVLE app to call (such as "fileservice").
527
631
* \param path URL path to make the request to, within the application.
528
632
* \param args Argument object, as described in parse_url and friends.
530
634
* \param content_type String, optional. Only applies if method is "POST".
531
635
* May be "application/x-www-form-urlencoded" or "multipart/form-data".
532
636
* Defaults to "application/x-www-form-urlencoded".
533
* \return An XMLHttpRequest object containing the completed response.
535
function ajax_call(app, path, args, method, content_type)
638
function ajax_call(callback, app, path, args, method, content_type)
537
640
if (content_type != "multipart/form-data")
538
641
content_type = "application/x-www-form-urlencoded";
541
644
/* A random string, for multipart/form-data
542
645
* (This is not checked against anywhere else, it is solely defined and
543
646
* used within this function) */
544
var boundary = "48234n334nu7n4n2ynonjn234t683jyh80j";
545
var xhr = new XMLHttpRequest();
647
var boundary = random_string(20);
648
var xhr = new_xmlhttprequest();
649
xhr.onreadystatechange = function()
651
if (xhr.readyState == 4)
546
656
if (method == "GET")
548
658
/* GET sends the args in the URL */
549
659
url = build_url({"path": path, "args": args});
550
/* open's 3rd argument = false -> SYNCHRONOUS (wait for response)
551
* (No need for a callback function) */
552
xhr.open(method, url, false);
660
/* open's 3rd argument = true -> asynchronous */
661
xhr.open(method, url, true);
557
666
/* POST sends the args in application/x-www-form-urlencoded */
558
667
url = encodeURI(path);
559
xhr.open(method, url, false);
668
xhr.open(method, url, true);
561
670
if (content_type == "multipart/form-data")
563
672
xhr.setRequestHeader("Content-Type",
564
"multipart/form-data, boundary=" + boundary);
673
"multipart/form-data; boundary=" + boundary);
565
674
message = make_multipart_formdata(args, boundary);