Trouble with JSON parsing

Thor Kristian Valderhaug

Vote:

Hi,

We are in the process of upgrating a site from Episerver 6 R2 to EPiServer 7. The site uses

ElencySolutions.MultipleProperty, when editing the properties in Episerver 7 we sometimes get the following error:

Value cannot be null.
Parameter name: s

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.ArgumentNullException: Value cannot be null.
Parameter name: s

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:

[ArgumentNullException: Value cannot be null.Parameter name: s] 
System.IO.StringReader..ctor(String s) +14418294 
EPiServer.UI.Edit.EditProperty.ApplyPostedValue() +335 
EPiServer.UI.Edit.EditProperty.Page_Init(Object sender, EventArgs e) +183 
System.Web.UI.Page.OnInit(EventArgs e) +102 
EPiServer.UI.ContentBaseWebForm.OnInit(EventArgs e) +16 
System.Web.UI.Control.InitRecursive(Control namingContainer) +186 
System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +2098

We have figured out that the error result from Json Deserialization. It looks like single quotes " ' " is not escaped so the post request done to the server are missing data.

A sample post failing request:

value:

[{"heading":"Nyheter Europa","description":"<p>Les mer om Norge

The expected request should look like:

value:

[{"heading":"Nyheter Europa","description":"<p>Les mer om Norge\'s arbeid i Europa.</p>","link":null,"linkName":""}]

If I change the single quote with a double quote the request succeedes:

value:
[{"heading":"Nyheter Europa","description":"<p>Les mer om Norge\"s arbeid i Europa.</p>","link":null,"linkName":""}]
 
As we see when I replace the single quote with a double it gets escaped and all works fine.
So the single quotes dont get escaped correctly.
 
Does anyone know how to fix this?

#65839

Feb 12, 2013 9:26

Linus Ekström

Vote:

I have reported a bug for this:

Bug #95698: Legacy editor dialog does not escape single quotes

We will see if there is a possible fix/workaround for this and post if here.

#65840

Feb 12, 2013 9:49

Thor Kristian Valderhaug

Vote:

Linus Ekström thanks for the quick response. Just to clearify this error happens when we edit properties in EPiServer 7 form editor modus. Is this the same as the Legacy editor dialog you refere to

#65845

Edited, Feb 12, 2013 10:43

Linus Ekström

Vote:

When you edit in the new editing UI we have a specific legacy editor that uses a pop up to load forms based editors. I'm guessing that this is where you are having problems.

#65850

Feb 12, 2013 11:46

Thor Kristian Valderhaug

Vote:

Linus do you have any update on the progres on the bug you reported?

#66252

Edited, Feb 25, 2013 17:42

Linus Ekström

Vote:

Unfortunately it's still active so noone has fixed it yet.

#66253

Feb 25, 2013 17:46

Duong Nguyen

Vote:

Well, I don't see the necessity of escaping ' in this case. I tried LinkCollection property which worked fine. Could you please post the entire request body.

#66452

Feb 28, 2013 17:06

Thor Kristian Valderhaug

Vote:

Thanks for the response Duong Nguyen

I have a property defined like this

[Display(
Name = "Venstremeny",
Description = "Liste med linker som blir menyen til venstre på siden",
Order = 10)]
[BackingType(typeof(PropertyLinkCollection))]
[CultureSpecific]
[Required]
public virtual LinkItemCollection LeftMenuLinks { get; set; }

When I add a new link the request look like:

ctl00$FullRegion$propertyValueField:

ctl00$FullRegion$LeftMenuLinks$ctl00$LinkValue: -1|http://vg.no|||les's mer

ctl00$FullRegion$SaveButton: Lagre

So everithing looks ok, and im able to save the linklist.

But when I try to open the list to edit it i get the exception detailed above. This error also happens if I publish the page before editing the list

the request done when i open the link list for edit is:

value:[{"attributes":{"href":"https://yyy.xxxxx.no/DesktopDefault.aspx"},"text":"yyy","langauge":"no","href":"https://yyy.xxxxx.no/DesktopDefault.aspx","target":null,"title":null},{"attributes":{"href":"https://www.nettavregning.no/Logginn.aspx?ReturnUrl=%2fDefault.aspx"},"text":"Nettweb","langauge":"no","href":"https://www.nettavregning.no/Logginn.aspx?ReturnUrl=%2fDefault.aspx","target":null,"title":null},{"attributes":{"href":"https://ffff.xxxxx.no/ffff/"},"text":"ffff","langauge":"no","href":"https://ffff.xxxxx.no/ffff/","target":null,"title":null},{"attributes":{"href":"http://home.xxxxx.no/fasitweb/WebLoginPage.aspx?ReturnUrl=%2ffasitweb%2fDefault.aspx"},"text":"Fasitregistrering","langauge":"no","href":"http://home.xxxxx.no/fasitweb/WebLoginPage.aspx?ReturnUrl=%2ffasitweb%2fDefault.aspx","target":null,"title":null},{"attributes":{"href":"https://rkom.xxxxx.no/zzzz/pages/LogIn.aspx"},"text":"RK-opsjonsbud","langauge":"no","href":"https://rkom.xxxxx.no/zzzz/pages/LogIn.aspx","target":null,"title":null},{"attributes":{"href":"http://home.xxxxx.no/webrev/WebLogin/WebLoginPage.aspx?ReturnUrl=%2fwebrev%2fpages%2fRevisionOverview.aspx%3fmode%3dopen&mode=open"},"text":"WebRev","langauge":"no","href":"http://home.xxxxx.no/webrev/WebLogin/WebLoginPage.aspx?ReturnUrl=%2fwebrev%2fpages%2fRevisionOverview.aspx%3fmode%3dopen&mode=open","target":null,"title":null},{"attributes":{"href":"http://driftsdata.xxxxx.no/ddd"},"text":"Anleggsdata","langauge":"no","href":"http://driftsdata.xxxxx.no/ddd","target":null,"title":null},{"attributes":{"href":"http://driftsdata.xxxxx.no/ddd"},"text":"ddd","langauge":"no","href":"http://driftsdata.xxxxx.no/ddd","target":null,"title":null},{"attributes":{"href":"http://necs.xxxxx.no/default.aspx"},"text":"NECS","langauge":"no","href":"http://necs.xxxxx.no/default.aspx","target":null,"title":null},{"attributes":{"href":"~/link/c84c3a76e5e0408d86c397febe035a6c.aspx"},"text":"Kontaktinformasjon ved feil","langauge":"no","href":"~/link/c84c3a76e5e0408d86c397febe035a6c.aspx","target":null,"title":null},{"attributes":{"href":"http://vg.no"},"text":"les

#66456

Feb 28, 2013 17:39

Duong Nguyen

Vote:

Does the text property have a single quote right at the place where json string is terminated? My test with ' was ok, and my json looked like:

[{"name":"linkCollection","value":[{"attributes":{"href":"http://google.se","target":null,"title":null},"text":"Test's \" sadasd","langauge":"en","href":"http://google.se","target":null,"title":null}]

However, I am on latest development codebase. I will try on EPiServer 7 release to see if I can catch it.

#66462

Feb 28, 2013 18:06

Thor Kristian Valderhaug

Vote:

Yes you are right the text property had a ' at the place where the string is terminated.

#66463

Feb 28, 2013 18:10

Duong Nguyen

Vote:

Really strange. It works well on my EPiServer 7 release installation. One more question: The request content, where did you take it from? .NET request object or some http sniffer like Firebug or Fiddler?

#66477

Mar 01, 2013 10:45

Thor Kristian Valderhaug

Vote:

Hi,

The request content was taken from the developertool from Chrome

#66495

Mar 01, 2013 13:58

Kristine Fagerli

Vote:

Hi,

I have an AlloyTech demosite running locally. If I have a property of type LinkItemCollection and create a link with a name with a ' in it, then try to edit this property after it is saved, I get the error:" Newtonsoft.Json.JsonReaderException: Unterminated string. Expected delimiter: ". Path '[0].text', line 1, position 57."

I don't have the newest patch of Episerver installed, so I don't know if that will make a difference, but this will be an easy way to reproduce the error.

#66520

Mar 04, 2013 10:11

Duong Nguyen

Vote:

Hi, I can now reproduce on a fresh installation. I guess it was fixed sometime between 7.0 and 7.1. By the way, I am investigating what is exactly the cause and finding a work around if it is possible.

#66521

Mar 04, 2013 10:25

Thor Kristian Valderhaug

Vote:

Hi,

Nice that you where able to reproduce the the problem. On our site we use the Episerver 7 Patch from Jan 28 2013. I have used the (http://<site>/<UiPath>/shell/debug/showfileversions functionality to confirm that the correct dll hav been loaded. But we still experience the problem.

Is this patch what you refere to as version 7.1?

#66522

Mar 04, 2013 10:42

Duong Nguyen

Vote:

I confirm that it is a bug on EPiServer 7 release. You can find on our public bug list (#91190). It is fixed and will be available on the coming release.

Unfortunately, I cannot provide any workaround since the main cause is quite in the core part of our scripts.

Thor: Sorry, the patch doesn't help this case. The fix was done on client side. I would recommend you to wait for the very soon coming Sparrowhawk 7.1 release.

#66546

Edited, Mar 04, 2013 17:03

Thor Kristian Valderhaug

Vote:

Hi Duong,

I see that the releas you were talking about came out yesterday. http://world.episerver.com/Articles/Items/EPiServer-7--Patch-2/, but I cant seem to find the issue muber (91190) in the list of fixed bugs.

When is this bugfix going to be released?

#68241

Mar 19, 2013 14:16

Duong Nguyen

Vote:

Hi Thor,

I didn't mean the patch. There will be an update for EPiServer UI, which you can pull directly from EPiServer Add-on store. Not sure when it is out yet.

Regards.

#68242

Edited, Mar 19, 2013 14:26

Marie Pauline

Vote:

I am having the same issue we have currently upgrade to 7.13. is there a fix for this?

Thanks

#109715

Oct 13, 2014 15:36

Linus Ekström

Vote:

Hi Marie!

If you still have this issue I suggest that you open a support case and give a detailed explanation what's needed to reproduce the issue.

Regards
Linus

#111770

Oct 21, 2014 10:17

Jonas Salomonsson

Vote:

Hello Linus / Duong / anyone, sorry for reviving such an old thread but i ran in to exactly this bug the other day and after some searching found this. Now as far as I can see neither of the bugs mentioned here (#95698, #91190) are listed on your bug page http://world.episerver.com/support/Bug-list/ . Is it possible that any fix done to this was reverted or was it never fixed? In any case, if it should be possible to fix this by upgrading some module, then what exactly and is there a guide on how to do it? For some reason when I try upgrading different modules on my site using the Add-on store it just works for a while and then nothing happends.

#175502

Edited, Feb 22, 2017 9:47

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Trouble with JSON parsing

Value cannot be null.Parameter name: s

Value cannot be null.
Parameter name: s