【发布时间】：2022-01-03 20:47:35
【问题描述】：
我在我的平台 (LMS) 中实现了一个 scorm api，为此我使用了 Ruby on rails、Scorm gem 和 javascript api。 一切正常，scorm 内容显示满意。我对 Scorm 内容没有太多经验，但是他们发给我一个 scorm 类型的 zip 文件，当它上传到我正在使用的平台时，加载和执行需要很长时间。当我在 Scorm 云上测试这个文件时，内容运行正常。问题是平台不会产生任何错误。
为什么会发生这种情况？ 我的代码中的错误？或 Scorm zip 文件的优化？ 其他scorm内容正常工作，但是这个特定的，我不知道为什么。我什么都想不出来
有什么想法吗？谢谢
这是de api js：
<html>
<head>
<title>VS SCORM - RTE API</title>
<script language="javascript">
function createRequest() {
// this is the object that we're going to (try to) create
var request;
// does the browser have native support for
// the XMLHttpRequest object
try {
request = new XMLHttpRequest();
}
// it failed so it's likely to be Internet Explorer which
// uses a different way to do this
catch (tryIE) {
// try to see if it's a newer version of Internet Explorer
try {
request = new ActiveXObject("Msxml2.XMLHTTP");
}
// that didn't work so ...
catch (tryOlderIE) {
// maybe it's an older version of Internet Explorer
try {
request = new ActiveXObject("Microsoft.XMLHTTP");
}
// even that didn't work (sigh)
catch (failed) {
alert("Error creating XMLHttpRequest");
}
}
}
return request;
}
//var debug = true;
var debug = false;
function sleep(milliseconds) {
var start = new Date().getTime();
for (var i = 0; i < 1e7; i++) {
if ((new Date().getTime() - start) > milliseconds){
break;
}
}
}
// ------------------------------------------
// SCORM RTE Functions - Initialization
// ------------------------------------------
function LMSInitialize(dummyString) {
// create request object
var req = createRequest();
// code to prevent caching
var d = new Date();
// set up request parameters - uses GET method
req.open('GET','/scorm/initializesco?code='+d.getTime(),false);
// submit to the server for processing
req.send(null);
// process returned data - error condition
if (req.status != 200) {
alert('Problem with Request');
return "";
}
// process returned data - OK
else {
return "true";
}
}
// ------------------------------------------
// SCORM RTE Functions - Getting and Setting Values
// ------------------------------------------
//function LMSGetValue(varname) {
// if (debug) {
// alert('*** LMSGetValue varname='+varname
// +' varvalue=value ***');
// }
// return "value";
//}
function LMSGetValue(varname) {
// create request object
var req = createRequest();
// set up request parameters - uses GET method
req.open('GET','/scorm/getValue?varname='+urlencode(varname)
+'&code='+Math.random(),false);
// submit to the server for processing
req.send(null);
//alert('LMSGetValue() - ' + req.responseText);
// process returned data - error condition
if (req.status != 200) {
alert('LMSGetValue() - Problem with Request');
return "";
}
// process returned data - OK
else {
return req.responseText.replace("\n","");
}
}
/*
function LMSSetValue(varname,varvalue) {
if (debug) {
alert('*** LMSSetValue varname='+varname
+' varvalue='+varvalue+' ***');
}
return "true";
}
*/
function LMSSetValue(varname,varvalue) {
// create request object
var req = createRequest();
// set up request parameters - uses combined GET and POST
//req.open('POST','nav/setValue?varname='+urlencode(varname)
// +'&code='+Math.random(),false);
// set up request parameters - uses combined GET and POST
req.open('POST','/scorm/setValue?varname='+urlencode(varname)
+'&code='+Math.random(),false);
// send header information along with the POST data
var params = 'varvalue='+urlencode(varvalue);
req.setRequestHeader("Content-type",
"application/x-www-form-urlencoded");
//req.setRequestHeader("Content-length", params.length);
//req.setRequestHeader("Connection", "close");
// submit to the server for processing
req.send(params);
// process returned data - error condition
if (req.status != 200) {
alert('LMSSetValue() - Problem with Request');
return "false";
}
// process returned data - OK
else {
return "true";
}
}
function LMSCommit(dummyString) {
LMSGetValue('');
if (debug)
{
//alert('*** LMSCommit ***');
}
return "true";
}
function LMSFinish(dummyString) {
// create request object
var req = createRequest();
// code to prevent caching
var d = new Date();
// set up request parameters - uses GET method
req.open('GET','/scorm/finishsco?code='+d.getTime(),false);
// submit to the server for processing
req.send(null);
// process returned data - error condition
if (req.status != 200) {
alert('Problem with Request');
return "";
}
// process returned data - OK
else {
return "true";
}
}
// ------------------------------------------
// SCORM RTE Functions - Error Handling
// ------------------------------------------
function LMSGetLastError() {
if (debug) { alert('*** LMSGetLastError ***'); }
sleep(1000);
return 0;
}
function LMSGetDiagnostic(errorCode) {
if (debug) {
alert('*** LMSGetDiagnostic errorCode='+errorCode+' ***');
}
return "diagnostic string";
}
function LMSGetErrorString(errorCode) {
if (debug) {
alert('*** LMSGetErrorString errorCode='+errorCode+' ***');
}
return "error string";
}
function urlencode( str ) {
//
// Ref: http://kevin.vanzonneveld.net/techblog/article/javascript_equivalent_for_phps_urlencode/
//
var histogram = {}, unicodeStr='', hexEscStr='';
var ret = (str+'').toString();
var replacer = function(search, replace, str) {
var tmp_arr = [];
tmp_arr = str.split(search);
return tmp_arr.join(replace);
};
// The histogram is identical to the one in urldecode.
histogram["'"] = '%27';
histogram['('] = '%28';
histogram[')'] = '%29';
histogram['*'] = '%2A';
histogram['~'] = '%7E';
histogram['!'] = '%21';
histogram['%20'] = '+';
histogram['\u00DC'] = '%DC';
histogram['\u00FC'] = '%FC';
histogram['\u00C4'] = '%D4';
histogram['\u00E4'] = '%E4';
histogram['\u00D6'] = '%D6';
histogram['\u00F6'] = '%F6';
histogram['\u00DF'] = '%DF';
histogram['\u20AC'] = '%80';
histogram['\u0081'] = '%81';
histogram['\u201A'] = '%82';
histogram['\u0192'] = '%83';
histogram['\u201E'] = '%84';
histogram['\u2026'] = '%85';
histogram['\u2020'] = '%86';
histogram['\u2021'] = '%87';
histogram['\u02C6'] = '%88';
histogram['\u2030'] = '%89';
histogram['\u0160'] = '%8A';
histogram['\u2039'] = '%8B';
histogram['\u0152'] = '%8C';
histogram['\u008D'] = '%8D';
histogram['\u017D'] = '%8E';
histogram['\u008F'] = '%8F';
histogram['\u0090'] = '%90';
histogram['\u2018'] = '%91';
histogram['\u2019'] = '%92';
histogram['\u201C'] = '%93';
histogram['\u201D'] = '%94';
histogram['\u2022'] = '%95';
histogram['\u2013'] = '%96';
histogram['\u2014'] = '%97';
histogram['\u02DC'] = '%98';
histogram['\u2122'] = '%99';
histogram['\u0161'] = '%9A';
histogram['\u203A'] = '%9B';
histogram['\u0153'] = '%9C';
histogram['\u009D'] = '%9D';
histogram['\u017E'] = '%9E';
histogram['\u0178'] = '%9F';
// Begin with encodeURIComponent, which most resembles PHP's encoding functions
ret = encodeURIComponent(ret);
for (unicodeStr in histogram) {
hexEscStr = histogram[unicodeStr];
ret = replacer(unicodeStr, hexEscStr, ret); // Custom replace. No regexing
}
// Uppercase for full PHP compatibility
return ret.replace(/(\%([a-z0-9]{2}))/g, function(full, m1, m2) {
return "%"+m2.toUpperCase();
});
}
</script>
</head>
<body>
<p>
</body>
</html>
【问题讨论】：
标签： ruby-on-rails scorm