Node.js JSON.parse Unexpected token error

Question

I have to import content for Json url in other site. (its almost more than 100K content)

here code i use (i am using requset for download josn file, and mongodb for saving data)

request(options, function (error, response, body) {
if (!error && response.statusCode == 200) {
var content = JSON.parse(body);
    // ....
    }
})

Everything work well but after 50K content imoprted i got this error

SyntaxError: Unexpected token <
    at Object.parse (native)
    at Request._callback (/home/app/app.js:58:30)
    at Request.self.callback (/home/app/node_modules/request/request.js:360:22)
    at Request.emit (events.js:98:17)
    at Request.<anonymous> (/home/app/node_modules/request/request.js:1202:14)
    at Request.emit (events.js:117:20)
    at IncomingMessage.<anonymous> (/home/app/node_modules/request/request.js:1150:12)
    at IncomingMessage.emit (events.js:117:20)
    at _stream_readable.js:944:16
    at process._tickCallback (node.js:448:13)

i will be appreciated if tell where i am wrong.

Just a wild guess, but maybe there's an unexpected token ">" in your JSON. — user663031
– user663031, Commented May 26, 2015 at 6:23
@torazaburo i found cause problem , in my source some page JSON is broken and have this error Malformed JSON , now i just need to know how i can prevent node from exiting my app — alireza
– alireza, Commented May 26, 2015 at 17:51

dthree · Accepted Answer · 2015-05-26 06:04:49Z

1

What is the source of the JSON file? Is it reliable? Review the JSON that is being parsed - "<" is very unusual for JSON, so it's probably not properly escaped.

I would also put a try { } catch(e) { } statement around your JSON.parse(body);

answered May 26, 2015 at 6:04

dthree

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10 Comments

alireza Over a year ago

here is my source wikiseda.com/dapp/… Is it reliable? well its only option i have.

dthree Over a year ago

Hmm.. are you sure that's what you are pulling? It was 2.6kb in size and when I ran JSON.parse() in my browser console, it parsed fine. You are saying what you are downloading is 100K. Is that 100Kb? Please clarifyi

alireza Over a year ago

i using request for downloading and using JSON.parse() method , i dont think be any different.

alireza Over a year ago

i found cause problem , in my source some page JSON is broken and have this error Malformed JSON , now i just need to know how i can prevent node from exiting my app.

dthree Over a year ago

Aha - I was right! try catch shouldn't end process btw - did you use it right?

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