未找到特定请求时如何退出PhantomJS？

Question

The problem is, some sites contain the request to test.com/test.aspx and some don't.

If the request exists, it should print the JSON and exit. If the request does not exist, it should exit too - at the moment, it stays open in this case.

Also, how could I make the code better? Maybe even faster if that's possible?

My JS code:

var Url = "http://www.test.de";
var params = new Array();
var webPage = require('webpage');
var page = webPage.create();
var targetJSON = {};
page.open(Url);
page.onResourceRequested = function(requestData, networkRequest) {
var match = requestData.url.match(/test.com\/test.aspx/g);
if (match != null) {
    var targetString = decodeURI(JSON.stringify(requestData.url));
    var klammerauf = targetString.indexOf("{");
    var jsonobjekt = targetString.substr(klammerauf,     (targetString.indexOf("}") - klammerauf) + 1);
    targetJSON = (decodeURIComponent(jsonobjekt));
    console.log(targetJSON);
    phantom.exit();
} 

};

I tried to add

} else {
  phantom.exit();
}

and

} if (match == null) {
phantom.exit();
}

but nothing solves my problem.

Answer 1

If you want to check whether something doesn't exist, then you need to check all things to see if they are not it or as first-order logic : .

You first need to see all requests to see whether your intended request was there. For example like this:

var found = false;
page.onResourceRequested = function(requestData, networkRequest) {
    var match = requestData.url.match(/test.com\/test.aspx/g);
    if (match != null) {
        var targetString = decodeURI(JSON.stringify(requestData.url));
        var klammerauf = targetString.indexOf("{");
        var jsonobjekt = targetString.substr(klammerauf,     (targetString.indexOf("}") - klammerauf) + 1);
        targetJSON = (decodeURIComponent(jsonobjekt));
        console.log(targetJSON);
        found = true;
        phantom.exit();
    } 
};
page.open(Url, function(){
    setTimeout(function(){
        console.log("found: " + found); // will always print "false"
        phantom.exit();
    }, 1000);
});

I solved this with a global variable which denotes whether the request was found. If it wasn't, then you can exit PhantomJS. If wait until the page is loaded and an additional waiting time in case there are Ajax requests.