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annotate mxtool/URLConnectionDownload.java @ 19960:999430bcc941

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Small fix for memory schedule verification. The begin node is not always the first node in the block if it is at the same time also the end node.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Thu, 19 Mar 2015 15:38:33 +0100
parents 07462ba5a12a
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /*
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2 * Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 */
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23 import java.io.*;
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24 import java.net.*;
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25 import java.util.*;
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26 import java.util.regex.*;
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27
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28 /**
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29 * Downloads content from a given URL to a given file.
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30 *
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31 * @param path where to write the content
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32 * @param urls the URLs to try, stopping after the first successful one
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33 */
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34 public class URLConnectionDownload {
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35 /**
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36 * Iterate over list of environment variable to find one that correctly specify an proxy.
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37 *
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38 * @param propPrefix indicates which proxy property to set (i.e., http or https)
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39 * @param proxyEnvVariableNames list of environment variable
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40 * @return a string specifying the proxy url
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41 */
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42 private static String setProxy(String[] proxyEnvVariableNames, String propPrefix) {
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43 String proxy = null;
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44 String proxyEnvVar = "";
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45 for (String envvar : proxyEnvVariableNames) {
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46 proxy = System.getenv(envvar);
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47 if (proxy != null) {
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48 proxyEnvVar = envvar;
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49 break;
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50 }
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51 }
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52 if (proxy != null) {
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53 Pattern p = Pattern.compile("(?:http://)?([^:]+)(:\\d+)?");
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54 Matcher m = p.matcher(proxy);
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55 if (m.matches()) {
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56 String host = m.group(1);
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57 String port = m.group(2);
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58 System.setProperty(propPrefix + ".proxyHost", host);
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59 if (port != null) {
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60 port = port.substring(1); // strip ':'
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61 System.setProperty(propPrefix + ".proxyPort", port);
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62 }
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63 return proxy;
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64 } else {
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65 System.err.println("Value of " + proxyEnvVar + " is not valid: " + proxy);
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66 }
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67 } else {
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68 System.err.println("** If behind a firewall without direct internet access, use the " + proxyEnvVariableNames[0] + " environment variable (e.g. 'env " + proxyEnvVariableNames[0] +
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69 "=proxy.company.com:80 max ...') or download manually with a web browser.");
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70 }
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71 return "";
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72 }
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73
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74 /**
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75 * Downloads content from a given URL to a given file.
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76 *
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77 * @param args arg[0] is the path where to write the content. The remainder of args are the URLs
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78 * to try, stopping after the first successful one
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79 */
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80 public static void main(String[] args) {
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81 File path = new File(args[0]);
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82 boolean verbose = args[1].equals("-v");
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83 int offset = verbose ? 2 : 1;
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84 String[] urls = new String[args.length - offset];
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85 System.arraycopy(args, offset, urls, 0, urls.length);
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86
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87 File parent = path.getParentFile();
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88 makeDirectory(parent);
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89
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90 // Enable use of system proxies
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91 System.setProperty("java.net.useSystemProxies", "true");
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92
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93 // Set standard proxy if any
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94 String proxy = setProxy(new String[]{"HTTP_PROXY", "http_proxy"}, "http");
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95 // Set proxy for secure http if explicitely set, default to http proxy otherwise
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96 String secureProxy = setProxy(new String[]{"HTTPS_PROXY", "https_proxy", "HTTP_PROXY", "http_proxy"}, "https");
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97 String proxyMsg = "";
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98 if (secureProxy.length() > 0 && proxy.length() > 0 && !secureProxy.equals(proxy)) {
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99 proxyMsg = " via " + proxy + " / " + secureProxy;
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100 } else if (proxy.length() > 0) {
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101 proxyMsg = " via " + proxy;
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102 } else if (secureProxy.length() > 0) {
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103 proxyMsg = " via " + secureProxy;
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104 }
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105
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106 for (String s : urls) {
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107 try {
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108 while (true) {
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109 System.err.println("Downloading " + s + " to " + path + proxyMsg);
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110 URL url = new URL(s);
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111 URLConnection conn = url.openConnection();
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112 // 10 second timeout to establish connection
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113 conn.setConnectTimeout(10000);
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114
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115 if (conn instanceof HttpURLConnection) {
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116 // HttpURLConnection per default follows redirections,
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117 // but not if it changes the protocol (e.g. http ->
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118 // https). While this is a sane default, in our
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119 // situation it's okay to follow a protocol transition.
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120 HttpURLConnection httpconn = (HttpURLConnection) conn;
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121 switch (httpconn.getResponseCode()) {
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122 case HttpURLConnection.HTTP_MOVED_PERM:
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123 case HttpURLConnection.HTTP_MOVED_TEMP:
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124 System.err.println("follow redirect...");
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125 s = httpconn.getHeaderField("Location");
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126 continue;
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127 }
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128 }
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129 InputStream in = conn.getInputStream();
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130 int size = conn.getContentLength();
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131 FileOutputStream out = new FileOutputStream(path);
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132 int read = 0;
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133 byte[] buf = new byte[8192];
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134 int n = 0;
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135 while ((read = in.read(buf)) != -1) {
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136 n += read;
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137 if (verbose) {
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138 long percent = ((long) n * 100 / size);
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139 System.err.print("\r " + n + " bytes " + (size == -1 ? "" : " (" + percent + "%)"));
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140 }
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141 out.write(buf, 0, read);
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142 }
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143 System.err.println();
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144 out.close();
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145 in.close();
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146 return;
3723
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147 }
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148 } catch (MalformedURLException e) {
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149 throw new Error("Error in URL " + s, e);
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150 } catch (IOException e) {
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151 System.err.println("Error reading from " + s + ": " + e);
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152 path.delete();
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153 }
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154 }
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155 throw new Error("Could not download content to " + path + " from " + Arrays.toString(urls));
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156 }
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157
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158 private static void makeDirectory(File directory) {
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159 if (!directory.exists() && !directory.mkdirs()) {
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160 throw new Error("Could not make directory " + directory);
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161 }
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162 }
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163 }