如何将字符串数组解析为JSON？

Question

I'm having the hardest time getting this string to be parseable. It may seem like a simple task, but it's driving me crazy. Infusionsoft returns this as their rest hook payload so I can't change the way it's recieved.

JSON.parse() doesn't work and I can't work with it as an object literal since the timestamp has no quotes. Is there a method or way I've just failed to see to parse this so I can easily get each id with a for loop as an example?

[{id:1049105, api_url:'', timestamp: 2017-07-12T00:34:36.000Z},{id:993221, api_url:'', timestamp: 2017-07-12T00:34:18.000Z}]

Any help would be greatly appreciated.

Answer 1

With some string manipulation and iterating over the string parts we can parse this response into an Array of valid JS objects.

I've run the code below and I get back an array of JS Objects that map to each "object" in the array string. It will also convert the invalid timestamp value to a JS Date Object.

let args = "[{id:1049105, api_url:'', timestamp: 2017-07-12T00:34:36.000Z},{id:993221, api_url:'', timestamp: 2017-07-12T00:34:18.000Z}]"

let splitArgs = args.split('},')
// Create an Array of parsed Objects
let objs = splitArgs.map(arg => {
    // remove whitespace
    let cleanArg = arg.trim()

    // Remove enclosing [ { } ] characters
    if (arg.startsWith('[')) {
        cleanArg = cleanArg.substr(1, arg.length)
    }
    if (cleanArg.startsWith('{')) {
        cleanArg = cleanArg.substr(1, arg.length)
    }
    if (cleanArg.endsWith(']')) {
        cleanArg = cleanArg.substr(0, arg.length - 1)
    }
    if (cleanArg.endsWith('}')) {
        cleanArg = cleanArg.substr(0, arg.length - 1)
    }

    // Remove any quotations and then split each of the properties out  
    let props = cleanArg.replace(/[\']+/, '').split(',')

    // For each prop, get the value and assign it to the new object
    // that will be returned by reduce()
    return props.reduce((obj, prop) => {
        let splitIndex = prop.indexOf(':')
        let key = prop.substr(0, splitIndex)
        let val = prop.substr(splitIndex + 1, prop.length)

        if (key.toLowerCase() === 'timestamp') {
            obj[key] = (new Date(val))
        } else {
            obj[key] = val
        }
        return obj
    }, {})
})

console.log(objs.map(obj => { return obj.id })) // [1049105, 993221]

Answer 2

The dates are in ISO format, so you can use a couple regexes to preprocess the string to JSON

string = "[...]"; 
string.replace(/(\d{4}-\d_2+-\d{2} ... /g, '"$1"'); // enclose dates in quotes
string.replace(/'/g, '"'); // replace single quotes with double quotes
string.replace(/id/g, '"id"'); // enclose id in double quotes
// repeat for api_url and timestamp

data = JSON.parse(string);

Answer 3

I'm the writer of scanf , would you like try this:

const {sscanf} = require('scanf');

let str = `[{id:1049105, api_url:'', timestamp: 2017-07-12T00:34:36.000Z},{id:993221, api_url:'', timestamp: 2017-07-12T00:34:18.000Z}]`;
let chunks = str.split('},{');

for (let chunk of chunks) {
  let obj = sscanf(chunk, "id:%d, api_url:%s, timestamp: %s}", 'id', 'api_url', 'timestamp')
  console.log(obj);
}

/*
{ id: 1049105,
  api_url: '\'\'',
  timestamp: '2017-07-12T00:34:36.000Z' }
{ id: 993221,
  api_url: '\'\'',
  timestamp: '2017-07-12T00:34:18.000Z' }
*/

There may by some problem with usage or BUG, you can submit issue for more.