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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 2 | daniel-mar | 1 | package de.viathinksoft.utils.http; |
| 2 | |||
| 3 | import java.io.IOException; |
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| 4 | import java.util.Random; |
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| 5 | |||
| 6 | import javax.xml.parsers.DocumentBuilder; |
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| 7 | import javax.xml.parsers.DocumentBuilderFactory; |
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| 8 | import javax.xml.parsers.ParserConfigurationException; |
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| 9 | |||
| 10 | import org.w3c.dom.Document; |
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| 11 | import org.w3c.dom.Element; |
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| 12 | import org.w3c.dom.Node; |
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| 13 | import org.w3c.dom.NodeList; |
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| 14 | import org.xml.sax.SAXException; |
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| 15 | |||
| 16 | /** |
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| 17 | * This factory produces a HttpUtil instance with faked user agents. |
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| 18 | * The instance is only created once. |
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| 19 | * @author Daniel Marschall |
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| 20 | */ |
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| 21 | |||
| 22 | public class SecretHttpFactory { |
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| 23 | |||
| 24 | static HttpUtils instance; |
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| 25 | static String userAgent; |
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| 26 | |||
| 27 | public static HttpUtils getInstance() { |
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| 28 | return instance; |
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| 29 | } |
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| 30 | |||
| 31 | public static String getUserAgent() { |
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| 32 | return userAgent; |
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| 33 | } |
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| 34 | |||
| 35 | private SecretHttpFactory() { |
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| 36 | } |
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| 37 | |||
| 38 | private static String getRandomUserAgent() { |
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| 39 | String userAgent = null; |
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| 40 | |||
| 41 | try { |
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| 42 | // Newest version here: http://www.user-agents.org/allagents.xml |
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| 43 | |||
| 44 | DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance(); |
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| 45 | DocumentBuilder db = dbf.newDocumentBuilder(); |
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| 46 | |||
| 47 | // File file = new File( |
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| 48 | // "src/de/viathinksoft/utils/http/allagents.xml"); |
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| 49 | // Document doc = db.parse(file); |
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| 50 | Document doc = db.parse(SecretHttpFactory.class.getResourceAsStream("allagents.xml")); |
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| 51 | doc.getDocumentElement().normalize(); |
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| 52 | NodeList nodeLst = doc.getElementsByTagName("user-agent"); |
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| 53 | |||
| 54 | if (nodeLst.getLength() == 0) { |
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| 55 | userAgent = null; |
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| 56 | } else { |
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| 57 | Random random = new Random(); |
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| 58 | int s = random.nextInt(nodeLst.getLength()); |
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| 59 | |||
| 60 | Node fstNode = nodeLst.item(s); |
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| 61 | |||
| 62 | if (fstNode.getNodeType() == Node.ELEMENT_NODE) { |
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| 63 | |||
| 64 | Element fstElmnt = (Element) fstNode; |
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| 65 | |||
| 66 | NodeList fstNmElmntLst = fstElmnt |
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| 67 | .getElementsByTagName("String"); |
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| 68 | Element fstNmElmnt = (Element) fstNmElmntLst.item(0); |
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| 69 | NodeList fstNm = fstNmElmnt.getChildNodes(); |
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| 70 | userAgent = ((Node) fstNm.item(0)).getNodeValue(); |
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| 71 | } |
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| 72 | } |
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| 73 | } catch (ParserConfigurationException e) { |
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| 74 | userAgent = null; |
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| 75 | } catch (SAXException e) { |
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| 76 | userAgent = null; |
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| 77 | } catch (IOException e) { |
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| 78 | e.printStackTrace(); |
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| 79 | userAgent = null; |
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| 80 | } |
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| 81 | |||
| 82 | return userAgent; |
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| 83 | } |
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| 84 | |||
| 85 | static { |
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| 86 | userAgent = getRandomUserAgent(); |
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| 87 | if (userAgent == null) { |
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| 88 | instance = new HttpUtils(); |
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| 89 | } else { |
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| 90 | instance = new HttpUtils(userAgent); |
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| 91 | } |
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| 92 | } |
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| 93 | |||
| 94 | } |