JSON string not recognised by LMS

[Andrew Poulos]

I'm creating a JSON string and passing it to a SCORM 1.2 compliant LMS thus:

var tmp = {};
tmp.assess = assessScore;
tmp.loc = location;
tmp.progress = notes.topics.to String();
fScormSetValue( "cmi.suspend_da ta", tmp.toJSONStrin g(), false);


alas the LMS complains with this error


Error: missing ; before statement

Line: 1104, Column: 35
Source Code:
this.cmi.suspen d_data.cmivalue
= "{"assess":{"0_ 1q":true},"loc" :"res_0_2.htm", "progress":"1"} ";
------^


Ok, the LMS sees the JSON string as more than one string. I can, though,
successfully read and write it to a cookie.

I'm not sure what's going on. How do I resolve this?

Andrew Poulos

[Randy Webb]

Re: JSON string not recognised by LMS

Andrew Poulos said the following on 12/18/2007 1:32 AM:

I'm creating a JSON string and passing it to a SCORM 1.2 compliant LMS
thus:
>
var tmp = {};
tmp.assess = assessScore;
tmp.loc = location;
tmp.progress = notes.topics.to String();
fScormSetValue( "cmi.suspend_da ta", tmp.toJSONStrin g(), false);
>
>
alas the LMS complains with this error
>
>
Error: missing ; before statement
>
Line: 1104, Column: 35
Source Code:
this.cmi.suspen d_data.cmivalue
= "{"assess":{"0_ 1q":true},"loc" :"res_0_2.htm", "progress":"1"} ";
------^

The first guess would that your problem is a quoting issue where it is
seeing the "{" and then assess and balking on the quotes. Try changing
the outer quotes to ' and see if it makes a difference.

this.cmi.suspen d_data.cmivalue ='{"assess":{"0 _1q":true},"loc ":"res_0_2.htm" ,"progress":"1" }';

--
Randy
Chance Favors The Prepared Mind
comp.lang.javas cript FAQ - http://jibbering.com/faq/index.html
Javascript Best Practices - http://www.JavascriptToolbox.com/bestpractices/

[Andrew Poulos]

Re: JSON string not recognised by LMS

Randy Webb wrote:

Andrew Poulos said the following on 12/18/2007 1:32 AM:

>I'm creating a JSON string and passing it to a SCORM 1.2 compliant LMS
>thus:
>>
>var tmp = {};
>tmp.assess = assessScore;
>tmp.loc = location;
>tmp.progress = notes.topics.to String();
>fScormSetValue ("cmi.suspend_d ata", tmp.toJSONStrin g(), false);
>>
>>
>alas the LMS complains with this error
>>
>>
>Error: missing ; before statement
>>
>Line: 1104, Column: 35
>Source Code:
>this.cmi.suspe nd_data.cmivalu e
>= "{"assess":{"0_ 1q":true},"loc" :"res_0_2.htm", "progress":"1"} ";
>------^

>
The first guess would that your problem is a quoting issue where it is
seeing the "{" and then assess and baulking on the quotes. Try changing
the outer quotes to ' and see if it makes a difference.
>
this.cmi.suspen d_data.cmivalue ='{"assess":{"0 _1q":true},"loc ":"res_0_2.htm" ,"progress":"1" }';
>

The error is being produced/reported by the LMS and is not something I
can edit. I call fScormSetValue which tells the LMS to update
cmi.suspendata with the value tmp.toJSONStrin g().

Andrew Poulos

[Andrew Poulos]

Re: JSON string not recognised by LMS

Andrew Poulos wrote:

Randy Webb wrote:

>Andrew Poulos said the following on 12/18/2007 1:32 AM:

>>I'm creating a JSON string and passing it to a SCORM 1.2 compliant
>>LMS thus:
>>>
>>var tmp = {};
>>tmp.assess = assessScore;
>>tmp.loc = location;
>>tmp.progres s = notes.topics.to String();
>>fScormSetValu e("cmi.suspend_ data", tmp.toJSONStrin g(), false);
>>>
>>>
>>alas the LMS complains with this error
>>>
>>>
>>Error: missing ; before statement
>>>
>>Line: 1104, Column: 35
>>Source Code:
>>this.cmi.susp end_data.cmival ue
>>= "{"assess":{"0_ 1q":true},"loc" :"res_0_2.htm", "progress":"1"} ";
>>------^

>>
>The first guess would that your problem is a quoting issue where it is
>seeing the "{" and then assess and baulking on the quotes. Try
>changing the outer quotes to ' and see if it makes a difference.
>>
>this.cmi.suspe nd_data.cmivalu e='{"assess":{" 0_1q":true},"lo c":"res_0_2.htm ","progress":"1 "}';
>>

>
The error is being produced/reported by the LMS and is not something I
can edit. I call fScormSetValue which tells the LMS to update
cmi.suspendata with the value tmp.toJSONStrin g().
>

I just tried this
mphLMS.scormSet Value("cmi.susp end_data","'"+t mp.toJSONString ()+"'",false);
in a wishful thinking frame of mind and got this error from the LMS:

Error: missing ; before statement

Line: 1104, Column: 36
Source Code:
this.cmi.suspen d_data.cmivalue
="'{"assess":{" 0_1q":true},"lo c":"res_0_2.htm ","progress":"1 "}'";
------^

It looks like the LMS is wrapping the value I send in double quotes.

Andrew Poulos

[Randy Webb]

Re: JSON string not recognised by LMS

Andrew Poulos said the following on 12/18/2007 6:07 AM:

Andrew Poulos wrote:

>Randy Webb wrote:

>>Andrew Poulos said the following on 12/18/2007 1:32 AM:
>>>I'm creating a JSON string and passing it to a SCORM 1.2 compliant
>>>LMS thus:
>>>>
>>>var tmp = {};
>>>tmp.assess = assessScore;
>>>tmp.loc = location;
>>>tmp.progre ss = notes.topics.to String();
>>>fScormSetVal ue("cmi.suspend _data", tmp.toJSONStrin g(), false);
>>>>
>>>>
>>>alas the LMS complains with this error
>>>>
>>>>
>>>Error: missing ; before statement
>>>>
>>>Line: 1104, Column: 35
>>>Source Code:
>>>this.cmi.sus pend_data.cmiva lue
>>>= "{"assess":{"0_ 1q":true},"loc" :"res_0_2.htm", "progress":"1"} ";
>>>------^
>>>
>>The first guess would that your problem is a quoting issue where it
>>is seeing the "{" and then assess and baulking on the quotes. Try
>>changing the outer quotes to ' and see if it makes a difference.
>>>
>>this.cmi.susp end_data.cmival ue='{"assess":{ "0_1q":true},"l oc":"res_0_2.ht m","progress":" 1"}';
>>>

>>
>The error is being produced/reported by the LMS and is not something I
>can edit. I call fScormSetValue which tells the LMS to update
>cmi.suspenda ta with the value tmp.toJSONStrin g().
>>

I just tried this
mphLMS.scormSet Value("cmi.susp end_data","'"+t mp.toJSONString ()+"'",false);
in a wishful thinking frame of mind and got this error from the LMS:
>
Error: missing ; before statement
>
Line: 1104, Column: 36
Source Code:
this.cmi.suspen d_data.cmivalue
="'{"assess":{" 0_1q":true},"lo c":"res_0_2.htm ","progress":"1 "}'";
------^
>
It looks like the LMS is wrapping the value I send in double quotes.

Then you either have to use ' in your value, escape it in your value, or
encode it.

--
Randy
Chance Favors The Prepared Mind
comp.lang.javas cript FAQ - http://jibbering.com/faq/index.html
Javascript Best Practices - http://www.JavascriptToolbox.com/bestpractices/

[Andrew Poulos]

Re: JSON string not recognised by LMS

Randy Webb wrote:

Andrew Poulos said the following on 12/18/2007 6:07 AM:

>Andrew Poulos wrote:

>>Randy Webb wrote:
>>>Andrew Poulos said the following on 12/18/2007 1:32 AM:
>>>>I'm creating a JSON string and passing it to a SCORM 1.2 compliant
>>>>LMS thus:
>>>>>
>>>>var tmp = {};
>>>>tmp.asses s = assessScore;
>>>>tmp.loc = location;
>>>>tmp.progres s = notes.topics.to String();
>>>>fScormSetVa lue("cmi.suspen d_data", tmp.toJSONStrin g(), false);
>>>>>
>>>>>
>>>>alas the LMS complains with this error
>>>>>
>>>>>
>>>>Error: missing ; before statement
>>>>>
>>>>Line: 1104, Column: 35
>>>>Source Code:
>>>>this.cmi.su spend_data.cmiv alue
>>>>= "{"assess":{"0_ 1q":true},"loc" :"res_0_2.htm", "progress":"1"} ";
>>>>------^
>>>>
>>>The first guess would that your problem is a quoting issue where it
>>>is seeing the "{" and then assess and baulking on the quotes. Try
>>>changing the outer quotes to ' and see if it makes a difference.
>>>>
>>>this.cmi.sus pend_data.cmiva lue='{"assess": {"0_1q":true}," loc":"res_0_2.h tm","progress": "1"}';
>>>>
>>>
>>The error is being produced/reported by the LMS and is not something
>>I can edit. I call fScormSetValue which tells the LMS to update
>>cmi.suspendat a with the value tmp.toJSONStrin g().
>>>

>I just tried this
>mphLMS.scormSe tValue("cmi.sus pend_data","'"+ tmp.toJSONStrin g()+"'",false);
>>
>in a wishful thinking frame of mind and got this error from the LMS:
>>
>Error: missing ; before statement
>>
>Line: 1104, Column: 36
>Source Code:
>this.cmi.suspe nd_data.cmivalu e
>="'{"assess":{ "0_1q":true},"l oc":"res_0_2.ht m","progress":" 1"}'";
>------^
>>
>It looks like the LMS is wrapping the value I send in double quotes.

>
Then you either have to use ' in your value, escape it in your value, or
encode it.
>

If I first convert apostrophes to ' and then quote to apostrophes
the LMS doesn't complain:

var tmp = {};
tmp.assess = assessScore;
tmp.loc = location;
tmp.progress = notes.topics.to String();

var str = tmp.toJSONStrin g();

str = str.replace(/'/g, "'");
str = str.replace(/\"/g, "'");

fScormSetValue( "cmi.suspend_da ta", str, false);

When I read back the value I reverse the process. It seems to be
working. Is this the "best" way to do it?

Andrew Poulos

[Randy Webb]

Re: JSON string not recognised by LMS

Andrew Poulos said the following on 12/18/2007 8:53 PM:

Randy Webb wrote:

<snip>

>Then you either have to use ' in your value, escape it in your value,
>or encode it.
>>

>
If I first convert apostrophes to &#39; and then quote to apostrophes
the LMS doesn't complain:
>
var tmp = {};
tmp.assess = assessScore;
tmp.loc = location;
tmp.progress = notes.topics.to String();
>
var str = tmp.toJSONStrin g();
>
str = str.replace(/'/g, "&#39;");
str = str.replace(/\"/g, "'");
>
fScormSetValue( "cmi.suspend_da ta", str, false);
>
When I read back the value I reverse the process. It seems to be
working. Is this the "best" way to do it?

Without knowing how the LMS works, nobody can tell you what way would be
"best". The only thing you can do is try different ways and see which
ones don't fail. If it isn't broke, don't fix it though :)

--
Randy
Chance Favors The Prepared Mind
comp.lang.javas cript FAQ - http://jibbering.com/faq/index.html
Javascript Best Practices - http://www.JavascriptToolbox.com/bestpractices/

[Andrew Poulos]

Re: JSON string not recognised by LMS

Randy Webb wrote:

Andrew Poulos said the following on 12/18/2007 8:53 PM:

>Randy Webb wrote:

>
<snip>
>

>>Then you either have to use ' in your value, escape it in your value,
>>or encode it.
>>>

>>
>If I first convert apostrophes to &#39; and then quote to apostrophes
>the LMS doesn't complain:
>>
>var tmp = {};
>tmp.assess = assessScore;
>tmp.loc = location;
>tmp.progress = notes.topics.to String();
>>
>var str = tmp.toJSONStrin g();
>>
>str = str.replace(/'/g, "&#39;");
>str = str.replace(/\"/g, "'");
>>
>fScormSetValue ("cmi.suspend_d ata", str, false);
>>
>When I read back the value I reverse the process. It seems to be
>working. Is this the "best" way to do it?

>
Without knowing how the LMS works, nobody can tell you what way would be
"best". The only thing you can do is try different ways and see which
ones don't fail. If it isn't broke, don't fix it though :)
>

Alas the LMS is a 3rd party product and so not open to inspection.
Thanks for your help.

Andrew Poulos