312
311
if (("path" in obj) && obj.path != null)
314
313
var path = urlencode_path(obj.path.toString());
315
if (url.length > 0 && path.length > 0 && path[0] != "/")
314
if (url.length > 0 && path.length > 0 && path.charAt(0) != "/")
316
315
path = "/" + path;
321
320
else if (("args" in obj) && obj.args != null)
322
321
query_string = make_query_string(obj.args);
324
if (query_string != null)
323
if (query_string != "" && query_string != null)
325
324
url += "?" + query_string;
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);
346
379
/** Given an argument map, as output in the args parameter of the return of
347
380
* parseurl, gets the first occurence of an argument in the URL string.
348
381
* If the argument was not found, returns null.
458
491
function pathlist_to_path(pathlist)
460
493
ret = path_join.apply(null, pathlist);
461
if (ret[ret.length-1] != '/')
494
if (ret.charAt(ret.length-1) != '/')
479
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));
482
523
/** Given a path, gets the "basename" (the last path segment).
484
525
function path_basename(path)
497
538
return str.substr(str.length - substring.length) == substring;
500
/** Equivalent to Python's repr.
501
* Gets the JavaScript string representation.
502
* Actually just calls JSON.stringify.
506
return JSON.stringify(str);
509
541
/** Removes all occurences of a value from an array.
511
543
Array.prototype.removeall = function(val)
521
553
arr.splice(j, i-j);
524
/** Makes an XMLHttpRequest call to the server. Waits (synchronously) for a
525
* response, and returns an XMLHttpRequest object containing the completed
556
/** Shallow-clones an object */
557
function shallow_clone_object(obj)
565
/** Returns a new XMLHttpRequest object, in a somewhat browser-agnostic
568
function new_xmlhttprequest()
573
return new XMLHttpRequest();
577
/* Internet Explorer */
580
return new ActiveXObject("Msxml2.XMLHTTP");
586
return new ActiveXObject("Microsoft.XMLHTTP");
590
throw("Your browser does not support AJAX. "
591
+ "IVLE requires a modern browser.");
597
/** Creates a random string of length length,
598
* consisting of alphanumeric characters.
600
var rand_chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZ"
601
+ "abcdefghiklmnopqrstuvwxyz";
602
function random_string(length)
604
var str = Array(length);
606
for (var i=0; i<length; i++)
608
v = Math.floor(Math.random() * rand_chars.length);
609
str[i] = rand_chars.charAt(v);
614
/** Makes an XMLHttpRequest call to the server.
615
* Sends the XMLHttpRequest object containing the completed response to a
616
* specified callback function.
618
* \param callback A callback function. Will be called when the response is
619
* complete. Passed 1 parameter, an XMLHttpRequest object containing the
620
* completed response. If callback is null this is a syncronous request
621
* otherwise this is an asynchronous request.
528
622
* \param app IVLE app to call (such as "fileservice").
529
623
* \param path URL path to make the request to, within the application.
530
624
* \param args Argument object, as described in parse_url and friends.
532
626
* \param content_type String, optional. Only applies if method is "POST".
533
627
* May be "application/x-www-form-urlencoded" or "multipart/form-data".
534
628
* Defaults to "application/x-www-form-urlencoded".
535
* \return An XMLHttpRequest object containing the completed response.
537
function ajax_call(app, path, args, method, content_type)
630
function ajax_call(callback, app, path, args, method, content_type)
539
632
if (content_type != "multipart/form-data")
540
633
content_type = "application/x-www-form-urlencoded";
543
636
/* A random string, for multipart/form-data
544
637
* (This is not checked against anywhere else, it is solely defined and
545
638
* used within this function) */
546
var boundary = "48234n334nu7n4n2ynonjn234t683jyh80j";
547
var xhr = new XMLHttpRequest();
639
var boundary = random_string(20);
640
var xhr = new_xmlhttprequest();
641
var asyncronous = callback != null;
644
xhr.onreadystatechange = function()
646
if (xhr.readyState == 4)
548
652
if (method == "GET")
550
654
/* GET sends the args in the URL */
551
655
url = build_url({"path": path, "args": args});
552
/* open's 3rd argument = false -> SYNCHRONOUS (wait for response)
553
* (No need for a callback function) */
554
xhr.open(method, url, false);
656
/* open's 3rd argument = true -> asynchronous */
657
xhr.open(method, url, asyncronous);
559
662
/* POST sends the args in application/x-www-form-urlencoded */
560
663
url = encodeURI(path);
561
xhr.open(method, url, false);
664
xhr.open(method, url, asyncronous);
563
666
if (content_type == "multipart/form-data")
565
668
xhr.setRequestHeader("Content-Type",
566
"multipart/form-data, boundary=" + boundary);
669
"multipart/form-data; boundary=" + boundary);
567
670
message = make_multipart_formdata(args, boundary);
574
677
xhr.send(message);
679
/* Only return the XHR for syncronous requests */
686
/** Attempts to JSON decodes a response object
687
* If a non-200 response or the JSON decode fails then returns null
689
function decode_response(response)
691
if (response.status == 200)
695
var responseText = response.responseText;
696
return JSON.parse(responseText);