Json Parse Error on sending a JSON string from IOS Native to Javascript (JSON.Parse)

Question

Below is my JSON string which am sending from my iOS native code to java script, by calling evaluateJavaScript on WKWebView. But when I run the project I am getting an error stated below(am using WKWebview to show my html file).

JSON:

{
"config": {
    "APIUrl": "https:some Url",
    "provider": "ActiveDirectory",
    "UserDetails": {
        "UserName": "Test User",
        "FullName": "",
        "EMailAddress": ""
    },
    "formdata": [{
        "postData": "{\"args\":[{\"Name\":\"ProcessName\",\"Value\":\"offlineformios\"},{\"Name\":\"isSubmitForm\",\"Value\":true}}]}",
        "url": "https:Get Url",
        "type": "POST",
        "responseStatus": 200
    },{
        "postData": "{\"args\":[{\"Name\":\"ProcessName\",\"Value\":\"offlineformios\"},{\"Name\":\"isSubmitForm\",\"Value\":true}}]}",
        "url": "https:Get Url",
        "type": "POST",
        "responseStatus": 200
    }],
    "CDNURL": "file: Local file path",
    "queryString": {
        "PROCESS": "offlineformios"
    },
    "auth": "Basic test auth",
    "culture": "en-US"
  }
}

Error:

WKJavaScriptExceptionMessage=SyntaxError: JSON Parse error: Expected '}', WKJavaScriptExceptionColumnNumber=32,

I have tried with jsonlint.com to check whether my JSON string is valid or not but it showing as valid. So I could not find any solutions,if anyone can help me out this that would be greate and I would expect the solution for this!Thanks.

_“which am sending from my iOS native code to java script”_ - and that means what exactly? How are you “sending” it, and who receives it where and how? — CBroe, Feb 01 '18 at 09:53

score 0 · Answer 1 · answered Feb 01 '18 at 09:52

0

It may be an Issue with the escape char of PostData

"postData": "{\"args\":[{\"Name\":\"ProcessName\",\"Value\":\"offlineformios\"},{\"Name\":\"isSubmitForm\",\"Value\":true}}]}",

answered Feb 01 '18 at 09:52

Stathis Papalefkas

121
6

what you mean by escape char of PostData? – Aneesh Feb 01 '18 at 10:09
For example \" . (https://en.wikipedia.org/wiki/Escape_character) Try with empty PostData and see if the error happens again. – Stathis Papalefkas Feb 01 '18 at 12:30

mplungjan · Answer 2 · 2018-02-01T10:14:05.590

Unexpected token at 235 which is

{\"args\":[{\"Name\":\"ProcessName\",\"Value\":\"offlineformios\"},{\"Name\":\"isSubmitForm\",\"Value\":true}}]}

So it may help to be run through the stringify and back:

var JSObject = {
"config": {
    "APIUrl": "https:some Url",
    "provider": "ActiveDirectory",
    "UserDetails": {
        "UserName": "Test User",
        "FullName": "",
        "EMailAddress": ""
    },
    "formdata": [{
        "postData": "{\"args\":[{\"Name\":\"ProcessName\",\"Value\":\"offlineformios\"},{\"Name\":\"isSubmitForm\",\"Value\":true}}]}",
        "url": "https:Get Url",
        "type": "POST",
        "responseStatus": 200
    },{
        "postData": "{\"args\":[{\"Name\":\"ProcessName\",\"Value\":\"offlineformios\"},{\"Name\":\"isSubmitForm\",\"Value\":true}}]}",
        "url": "https:Get Url",
        "type": "POST",
        "responseStatus": 200
    }],
    "CDNURL": "file: Local file path",
    "queryString": {
        "PROCESS": "offlineformios"
    },
    "auth": "Basic test auth",
    "culture": "en-US"
  }
};
var JSString = JSON.stringify(JSObject)
var newObject = JSON.parse(JSString) 
console.log(newObject);

Json Parse Error on sending a JSON string from IOS Native to Javascript (JSON.Parse)

2 Answers2