1 | //
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2 | // $Id: DefaultUploadPolicy.java 289 2007-06-19 10:04:46 +0000 (mar., 19 juin
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3 | // 2007) etienne_sf $
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4 | //
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5 | // jupload - A file upload juploadContext.
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6 | // Copyright 2007 The JUpload Team
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7 | //
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8 | // Created: 2006-05-04
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9 | // Creator: etienne_sf
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10 | // Last modified: $Date: 2010-01-23 18:39:37 +0100 (sam., 23 janv. 2010) $
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11 | //
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12 | // This program is free software; you can redistribute it and/or modify it under
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13 | // the terms of the GNU General Public License as published by the Free Software
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14 | // Foundation; either version 2 of the License, or (at your option) any later
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15 | // version. This program is distributed in the hope that it will be useful, but
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16 | // WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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17 | // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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18 | // details. You should have received a copy of the GNU General Public License
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19 | // along with this program; if not, write to the Free Software Foundation, Inc.,
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20 | // 675 Mass Ave, Cambridge, MA 02139, USA.
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21 | package wjhk.jupload2.upload.helper;
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22 |
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23 | import wjhk.jupload2.policies.UploadPolicy;
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24 |
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25 | /**
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26 | * This Thread executes a HEAD request to the server. From the server response,
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27 | * the exact HTTP protocol, and any possible redirection are checked and used
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28 | * (if any) to update the uploadURL.<BR>
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29 | * The entry point for this method is the static
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30 | * {@link #computeServerProtocol(UploadPolicy, String)} method.
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31 | *
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32 | * @author etienne_sf
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33 | */
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34 | public class HttpProtocolFinderThread extends Thread {
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35 | /** The current upload policy */
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36 | UploadPolicy uploadPolicy;
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37 |
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38 | /** The given which should be analysed, to find the server protocol */
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39 | String givenServerProtocol;
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40 |
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41 | /**
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42 | * This static method is the entry point for this class. It creates a
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43 | * thread, and launch it, returning immediatly. The finding of the server
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44 | * protocol is then executed in a separated thread. So whenver long it is,
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45 | * the user won't see it. A default protocol is set immediatly, in the run
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46 | * method, to be sure that there will be no NullPointerException.
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47 | *
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48 | * @param uploadPolicy The current upload policy
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49 | * @param givenServerProtocol The protocol given as parameter. If valid it
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50 | * will be used. If not, the serverProtocol will be computed from
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51 | * the post URL (and from a HEAD request for HTTP URL).
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52 | */
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53 | static public void computeServerProtocol(UploadPolicy uploadPolicy,
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54 | String givenServerProtocol) {
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55 | new HttpProtocolFinderThread(uploadPolicy, givenServerProtocol).start();
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56 | }
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57 |
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58 | /**
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59 | * @param uploadPolicy The current upload policy
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60 | * @param givenServerProtocol The protocol given as parameter. If valid it
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61 | * will be used. If not, the serverProtocol will be computed from
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62 | * the post URL (and from a HEAD request for HTTP URL).
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63 | */
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64 | public HttpProtocolFinderThread(UploadPolicy uploadPolicy,
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65 | String givenServerProtocol) {
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66 | //Let's name this thread. It's easier for debugging.
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67 | super("HttpProtocolFinderThread");
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68 |
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69 | this.uploadPolicy = uploadPolicy;
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70 | this.givenServerProtocol = givenServerProtocol;
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71 | }
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72 |
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73 | /**
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74 | * The job itself. Will do a HEAD request if it's a HTTP URL. Will just note
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75 | * ftp if FTP. Otherwise: will throw an error.
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76 | */
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77 | public void run() {
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78 | String computedProtocol = null;
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79 | String postURL = this.uploadPolicy.getPostURL();
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80 |
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81 | if (null == givenServerProtocol || givenServerProtocol.equals("")) {
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82 | if (null == postURL || postURL.equals("")) {
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83 | this.uploadPolicy.displayErr("postURL not set");
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84 | computedProtocol = UploadPolicy.DEFAULT_SERVER_PROTOCOL;
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85 | } else if (postURL.substring(0, 3).equals("ftp")) {
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86 | computedProtocol = "ftp";
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87 | } else {
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88 | try {
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89 | this.uploadPolicy.displayDebug(
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90 | "Getting serverProtocol from HEAD request", 30);
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91 |
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92 | // Let's set a default protocol immediatly. It should be
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93 | // good, and avoid a NullPointerException if an upload
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94 | // starts immediatly.
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95 | this.uploadPolicy
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96 | .setServerProtocol(UploadPolicy.DEFAULT_SERVER_PROTOCOL);
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97 | // Then we do the head request to the server
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98 | computedProtocol = new HttpConnect(this.uploadPolicy)
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99 | .getProtocol();
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100 | } catch (Exception e) {
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101 | // If we throw an error here, we prevent the applet
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102 | // to
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103 | // start. So we just log it, and try the default protocol
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104 | this.uploadPolicy.displayErr(
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105 | "Unable to access to the postURL: '" + postURL
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106 | + "'", e);
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107 | // Let's try with default value.
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108 | computedProtocol = UploadPolicy.DEFAULT_SERVER_PROTOCOL;
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109 | }
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110 | }
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111 | } else if (this.givenServerProtocol.startsWith("HTTP")) {
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112 | try {
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113 | // In HTTP mode, we always give a try to HTTPConnect, to check
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114 | // if the page has moved, and other stuff.
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115 | // But we keep the parameter given when calling this method.
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116 | this.uploadPolicy.displayDebug(
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117 | "Checking any redirect, from HEAD request", 30);
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118 | // Let's set a default protocol immediatly. It should be
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119 | // good, and avoid a NullPointerException if an upload
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120 | // starts immediatly.
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121 | this.uploadPolicy
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122 | .setServerProtocol(UploadPolicy.DEFAULT_SERVER_PROTOCOL);
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123 | // Then we do the head request to the server
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124 | computedProtocol = new HttpConnect(this.uploadPolicy)
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125 | .getProtocol();
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126 | } catch (Exception e) {
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127 | // If we throw an error here, we prevent the applet to
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128 | // start. So we just log it, and try the default protocol
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129 | this.uploadPolicy.displayErr(
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130 | "Unknown to get protocol in the given postURL ("
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131 | + this.uploadPolicy.getPostURL()
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132 | + "), due to error: " + e.getMessage(), e);
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133 | }
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134 | }
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135 | this.uploadPolicy.setServerProtocol(computedProtocol);
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136 | }
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137 | }
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