How to convert string to json in Angular? - node.js

Question

Starting to the following kind of string:
const json = '{"list":"[{"additionalInformation": {"source": "5f645d7d94-c6ktd"}, "alarmName": "data", "description": "Validation Error. Fetching info has been skipped.", "eventTime": "2020-01-27T14:42:44.143200 UTC", "expires": 2784, "faultyResource": "Data", "name": "prisco", "severity": "Major"}]"}'
How can I manage this as a JSON? The following approach doesn't work
const obj = JSON.parse(json );
unuspected result
How can I parse it correctly?
In conclusion, I should extract the part relative to the first item list and then parse the JSON that it contains.

Answer 1

Your JSON is invalid. The following is the valid version of your JSON:
const json= {
"list": [ {
"additionalInformation": {
"source": "5f645d7d94-c6ktd"
},
"alarmName": "data",
"description": "Validation Error. Fetching info has been skipped.",
"eventTime": "2020-01-27T14:42:44.143200 UTC",
"expires": 2784,
"faultyResource": "Data",
"name": "prisco",
"severity": "Major"
}
]
}
The above is already a JSON and parsing it as JSON again throws an error.
JSON.parse() parse string/ text and turn it into JavaScript object. The string/ text should be in a JSON format or it will throw an error.
Update:
Create a function to clean your string and prepare it for JSON.parse():
cleanString(str) {
str = str.replace('"[', '[');
str = str.replace(']"', ']');
return str;
}
And use it like:
json = this.cleanString(json);
console.log(JSON.parse(json));
Demo:
let json = '{"list":"[{"additionalInformation": {"source": "5f645d7d94-c6ktd"}, "alarmName": "data", "description": "Validation Error. Fetching info has been skipped.", "eventTime": "2020-01-27T14:42:44.143200 UTC", "expires": 2784, "faultyResource": "Data", "name": "prisco", "severity": "Major"}]"}';
json = cleanString(json);
console.log(JSON.parse(json));
function cleanString(str) {
str = str.replace('"[', '[');
str = str.replace(']"', ']');
return str;
}

Answer 2

Remove the double quotes from around the array brackets to make the json valid:
const json = '{"list":[{"additionalInformation": {"source": "5f645d7d94-c6ktd"}, "alarmName": "data", "description": "Validation Error. Fetching info has been skipped.", "eventTime": "2020-01-27T14:42:44.143200 UTC", "expires": 2784, "faultyResource": "Data", "name": "prisco", "severity": "Major"}]}'