Thinky/scraper.js at master · JamesSwift/Thinky · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
/*
	This file listens to a list of URLs that users request
	and creates a cached version of them. The web server will
	then serve the cached version next time the URL is loaded.

	This has no real impact on normal users, but lets search
	engines see the actual page content.

	It's a bit messy, but it works.

*/

const viewsList = "cache/cachedViews.json";
const cachedSession = "cache/cachedSession.json";
const cacheDir = "cache/views/";

var fs = require('fs');
var views = {};
var session = {};
try {
	views = JSON.parse(fs.readFileSync(viewsList, 'utf8'));
	session = JSON.parse(fs.readFileSync(cachedSession, 'utf8'));
} catch(err){}
var save = Object.assign({}, views);

if (!fs.existsSync(cacheDir)){
    fs.mkdirSync(cacheDir);
}


var jsSHA = require('./www/js/sha256.js');

//Find correct hostname
const user = require("os").userInfo().username;
var host = "https://www.example.com/";
if (user === "test"){
	host = "https://test.example.com/";
}


const jsdom = require("jsdom");
const { JSDOM } = jsdom;

const dom = new JSDOM(`
	<!DOCTYPE html><html><head>
		<script src="/js/utils.js"></script>
		<script src="/js/swdapi-client.min.js"></script>
		<script src="/js/sha256.js"></script>
		<script src="/js/inputValidator.js"></script>
		<script src="/js/controller.js"></script>
		<script src="/js/views-www/"></script>
	</head><body>
		<div id="content"></div>
		<div id="mask" class="display-none"></div>
		<div id="modals"></div>
		<div id="loading" class="display-none"></div>
		<script src="/js/headless.js"></script>
	</body></html>`, {
	url: host,
	runScripts: "dangerously",
	resources: "usable",
	pretendToBeVisual: true,
	beforeParse(window){
		window.localStorage = window.sessionStorage = {
			getItem: function (key) {
				return session[key];
			},
			setItem: function (key, value) {
				session[key] = value;
			},
			removeItem: function(key){
				delete session[key];
			}
		};

		window.scrollTo = function(){ return true; }
	}
});

const { window } = dom;

window.onload = function(){

	window.u.waitForObjects([ [window, "controller", "htmlDataPreloaded"] ], function(){

		var view, i, controller = window.controller;

		for (i in views){
			view = views[i];
			controller.getRenderedViewHTML(view.url,
				saveView,
				deleteView
			);
		}

		window.setTimeout(saveThenClose, 5000);

	});

};

function saveView(url, title, html){

	var crypto = new jsSHA("SHA-256", "TEXT");
	crypto.update(url);
	var hash = crypto.getHash("HEX");

	//Update the DB
	save[hash] = {
		url: url,
		cached: Date.now(),
		file: cacheDir + hash + ".json"
	};

	fs.writeFile(cacheDir + hash + ".json", JSON.stringify({title: title, html: html}), 'utf8', function(err){
		if (err) throw err;
	});
}

function deleteView(url){

	var crypto = new jsSHA("SHA-256", "TEXT");
	crypto.update(url);
	var hash = crypto.getHash("HEX");

	delete save[hash];

}

function saveThenClose(){
	window.close();
	fs.writeFile(viewsList, JSON.stringify(save), 'utf8', function(err){
		if (err) throw err;
	});
	fs.writeFile(cachedSession, JSON.stringify(session), 'utf8', function(err){
		if (err) throw err;
	});
}