JSON.parse SyntaxError：使用JSON解析文件时出现意外令牌{

Question

I'm having problems trying to parse a file that has the following text in it:

{ "type": "header", "log_level": 3, "target_port": 80, "source_port_first": 32768, "source_port_last": 61000, "max_targets": -1, "max_runtime": 0, "max_results": 0, "iface": "en0", "rate": 0, "bandwidth": 0, "cooldown_secs": 8, "senders": 7, "use_seed": 0, "seed": 0, "generator": 0, "packet_streams": 1, "probe_module": "tcp_synscan", "output_module": "json", "gw_mac": "00:00:00:00:00:00", "source_ip_first": "127.0.0.1", "source_ip_last": "127.0.0.1", "output_filename": ".\/static\/results\/80.json", "whitelist_filename": ".\/static\/whitelist.conf", "dryrun": 0, "summary": 0, "quiet": 1, "recv_ready": 0 }
{ "type": "result", "saddr": "127.0.0.1" }

This is a Zmap output and node.js keeps choking on everything after the first line. If you remove the second line from the file, there are no errors and the program runs fine.

I want to be able to read the JSON data in the file and be able to reference each key and value and print them out in console.log.

Here's my current code:

var fs = require('fs');
var filename = './80.json';
var bufferString;

function ReadFile(callback) {
  fs.readFile(filename, 'utf-8', function(err, data) {
    bufferString = data;
    callback();
  }); 
}

function PrintLine() {
  console.log(JSON.parse(bufferString));
}

ReadFile(PrintLine)

Realistically, I would like to put all this data into a database, but I need to solve the problem of reading the file properly.

Answer 1

You can't have multiple JSON objects in a file like that. If you want to store 2 objects in JSON you need to add them to an array:

[
    { "type": "header", ..., "recv_ready": 0 },
    { "type": "result", "saddr": "127.0.0.1" }
]

You can access each object with their index:

var json = JSON.parse(bufferString);
json[0]; // this is the first object (defined on the first line)
json[1]; // this is the second object (defined on the second line)

Answer 2

Like mentioned, the JSON is invalid. But, instead of turning the JSON in the file into an array of objects, you can also process each line, if each object is on a new line:

However, be aware that, like @jsve pointed out, your file would then remain a JSON impostor.

function PrintLine() {
    var lines = bufferString.split('\n'),
        tmp = [],
        len = lines.length;
    for(var i = 0; i < len; i++) {
        // Check if the line isn't empty
        if(lines[i]) tmp.push( JSON.parse(lines[i]) );
    }
    lines = tmp;
    console.log(lines[0], lines[1]);
}

ReadFile(PrintLine);