使用javascript和CasperJS从JSON url中提取特定的键:值对

var casper = require('casper').create();
var utils = require('utils');
var fs = require('fs');

var jsonUrl = 'http://example.com/data.json';
var targetKey = 'name';

function extractData(jsonData, targetKey) {
    var data = JSON.parse(jsonData);
    var targetValue = data[targetKey];
    return targetValue;
}

casper.start(jsonUrl, function() {
    var jsonData = this.getPageContent();
    var targetValue = extractData(jsonData, targetKey);
    console.log(targetValue);
});

casper.run();