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Question

PhantomJS is a headless WebKit browser. I can open a url with this and get content of a page that updates every second.

But I need to get the content of many (100) pages at the same time.

All pages must be opened concurrently and refresh every second.

It's possible for one page, but I don't know how to retrieve from multiple pages at once.

This is the example code from the PhantomJS website :

console.log('Loading a web page');
var page = require('webpage').create();
var url = 'http://www.phantomjs.org/';
page.open(url, function (status) {
  //Page is loaded!
  phantom.exit();
});

May I use many PhantomJS instances at one time ? I doesn't seem the best way. Does any body know how to open just one PhantomJS instance and get content from several pages?

Answer 1

Here is the code, I used before to parse the items for the E-shop and putting HTML code for each page of these items

I hope that it will help you!

var RenderUrlsToFile, system, url_string_for_array;
var arrayOfUrls = new Array();

system = require("system");

RenderUrlsToFile = function(urls, callbackPerUrl, callbackFinal) {
var getFilename, next, page, retrieve, urlIndex, webpage, link_name, sex;

var fs = {};
fs = require('fs');

urlIndex = 0;
webpage = require("webpage");
page = null;
// getFilename = function() {
//     return "parsed/" + urlIndex + ".png";
// };
next = function(status, url, file) {
    page.close();
    callbackPerUrl(status, url, file);
    return retrieve();
};
retrieve = function() {
    var url;
    if (urls.length > 0) {
        url = urls.shift();
        urlIndex++;
        page = webpage.create();
        page.viewportSize = {
            width: 800,
            height: 600
        };
        page.settings.userAgent = "Phantom.js bot";
        return page.open("http://" + url, function(status) {
            var file;
            // file = getFilename();
            if (status === "success") {
                return window.setTimeout((function() {
                    // page.render(file);

                    var js = page.evaluate(function () {
                            return document;
                        });

                    fs.write('your_file_path'.html', js.all[0].outerHTML, 'w');

                    return next(status, url, file);
                }), 100);
            } else {
                return next(status, url, file);
            }
        });

    } else {
        return callbackFinal();
    }
};
return retrieve();
};

if (system.args.length > 1) {
arrayOfUrls = Array.prototype.slice.call(system.args, 1);
} else {

------------MAIN PART OF CODE FOR YOUR QUESTION------

For example: I need to parse the items on the E-shop, so I take the first page and then I set "for" for the exactly numbe of pages

url_string_for_array = "www.lamoda.ru/c/559/accs-muzhskieaksessuary/?genders=men&page=1";

for(var k=2; k<20; k++)
    {
        url_string_for_array += ",www.lamoda.ru/c/559/accs-muzhskieaksessuary/?genders=men&page="+k;
    }

---

arrayOfUrls = url_string_for_array.split(',');
}

RenderUrlsToFile(arrayOfUrls, (function(status, url, file) {
if (status !== "success") {
    return console.log("Unable to render '" + url + "'");
} else {
    return console.log("Rendered '" + url + "'");
}
}), function() {
return phantom.exit();
});