Multi tool use

Unexpected end of json input in Node.js

I have Json data which I receive it as post data in my node.js server.

But the problem is, its not able to parse the string I sent.Here is my node.js server code.

res.header("Access-Control-Allow-Origin", "*");
req.on('data',function(data)
{
var done=false;
console.log(data);
var schema;

schema=JSON.parse(data);
}


Here I get the error when I parse the json data(data).

undefined:776



SyntaxError: Unexpected end of JSON input
at JSON.parse (<anonymous>)
at IncomingMessage.<anonymous> (/Users/as6/Documents/test/server.js:206:17)
at emitOne (events.js:115:13)
at IncomingMessage.emit (events.js:210:7)
at IncomingMessage.Readable.read (_stream_readable.js:462:10)
at flow (_stream_readable.js:833:34)
at resume_ (_stream_readable.js:815:3)
at _combinedTickCallback (internal/process/next_tick.js:102:11)
at process._tickCallback (internal/process/next_tick.js:161:9)


I verified JSON data using JSONLint for syntax errors.But it was absolutely fine. I dont know what's wrong and how to correct it.

2 Answers
2

data events can be fired multiple times, so you have to collect all the data values and concatenate them together when the end event has fires:

data

data

end

let chunks = ;

req.on('data', function(data) {
chunks.push(data);
}).on('end', function() {
let data = Buffer.concat(chunks);
let schema = JSON.parse(data);
...
});


However, perhaps you should consider using body-parser.

body-parser

Do change the line

schema = JSON.parse(data);


into

schema = JSON.parse(JSON.stringify(data));


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