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| 1 | /* | ||
| 2 | * Copyright (c) 2009, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package sun.net.www.http; | ||
| 27 | |||
| 28 | import java.io.*; | ||
| 29 | import java.util.ArrayList; | ||
| 30 | import java.util.regex.*; | ||
| 31 | import sun.net.NetProperties; | ||
| 32 | import sun.util.logging.PlatformLogger; | ||
| 33 | |||
| 34 | /** | ||
| 35 | * Main class of the HTTP traffic capture tool. | ||
| 36 | * Captures are triggered by the sun.net.http.captureRules system property. | ||
| 37 | * If set, it should point to a file containing the capture rules. | ||
| 38 | * Format for the file is simple: | ||
| 39 | * - 1 rule per line | ||
| 40 | * - Lines starting with a # are considered comments and ignored | ||
| 41 | * - a rule is a pair of a regular expression and file pattern, separated by a comma | ||
| 42 | * - The regular expression is applied to URLs, if it matches, the traffic for | ||
| 43 | * that URL will be captured in the associated file. | ||
| 44 | * - if the file name contains a '%d', then that sequence will be replaced by a | ||
| 45 | * unique random number for each URL. This allow for multi-threaded captures | ||
| 46 | * of URLs matching the same pattern. | ||
| 47 | * - Rules are checked in sequence, in the same order as in the file, until a | ||
| 48 | * match is found or the end of the list is reached. | ||
| 49 | * | ||
| 50 | * Examples of rules: | ||
| 51 | * www\.sun\.com , sun%d.log | ||
| 52 | * yahoo\.com\/.*asf , yahoo.log | ||
| 53 | * | ||
| 54 | * @author jccollet | ||
| 55 | */ | ||
| 56 | public class HttpCapture { | ||
| 57 | private File file = null; | ||
| 58 | private boolean incoming = true; | ||
| 59 | private BufferedWriter out = null; | ||
| 60 | private static boolean initialized = false; | ||
| 61 | private static volatile ArrayList<Pattern> patterns = null; | ||
| 62 | private static volatile ArrayList<String> capFiles = null; | ||
| 63 | |||
| 64 | private static synchronized void init() { | ||
| 65 | initialized = true; | ||
| 66 | String rulesFile = java.security.AccessController.doPrivileged( | ||
| 67 | new java.security.PrivilegedAction<String>() { | ||
| 68 | public String run() { | ||
| 69 | return NetProperties.get("sun.net.http.captureRules"); | ||
| 70 | } | ||
| 71 | }); | ||
| 72 | if (rulesFile != null && !rulesFile.isEmpty()) { | ||
| 73 | BufferedReader in; | ||
| 74 | try { | ||
| 75 | in = new BufferedReader(new FileReader(rulesFile)); | ||
| 76 | } catch (FileNotFoundException ex) { | ||
| 77 | return; | ||
| 78 | } | ||
| 79 | try { | ||
| 80 | String line = in.readLine(); | ||
| 81 | while (line != null) { | ||
| 82 | line = line.trim(); | ||
| 83 | if (!line.startsWith("#")) { | ||
| 84 | // skip line if it's a comment | ||
| 85 | String[] s = line.split(","); | ||
| 86 | if (s.length == 2) { | ||
| 87 | if (patterns == null) { | ||
| 88 | patterns = new ArrayList<Pattern>(); | ||
| 89 | capFiles = new ArrayList<String>(); | ||
| 90 | } | ||
| 91 | patterns.add(Pattern.compile(s[0].trim())); | ||
| 92 | capFiles.add(s[1].trim()); | ||
| 93 | } | ||
| 94 | } | ||
| 95 | line = in.readLine(); | ||
| 96 | } | ||
| 97 | } catch (IOException ioe) { | ||
| 98 | |||
| 99 | } finally { | ||
| 100 | try { | ||
| 101 | in.close(); | ||
| 102 | } catch (IOException ex) { | ||
| 103 | } | ||
| 104 | } | ||
| 105 | } | ||
| 106 | } | ||
| 107 | |||
| 108 | private static synchronized boolean isInitialized() { | ||
| 109 | return initialized; | ||
| 110 | } | ||
| 111 | |||
| 112 | private HttpCapture(File f, java.net.URL url) { | ||
| 113 | file = f; | ||
| 114 | try { | ||
| 115 | out = new BufferedWriter(new FileWriter(file, true)); | ||
| 116 | out.write("URL: " + url + "\n"); | ||
| 117 | } catch (IOException ex) { | ||
| 118 | PlatformLogger.getLogger(HttpCapture.class.getName()).severe(null, ex); | ||
| 119 | } | ||
| 120 | } | ||
| 121 | |||
| 122 | public synchronized void sent(int c) throws IOException { | ||
| 123 | if (incoming) { | ||
| 124 | out.write("\n------>\n"); | ||
| 125 | incoming = false; | ||
| 126 | out.flush(); | ||
| 127 | } | ||
| 128 | out.write(c); | ||
| 129 | } | ||
| 130 | |||
| 131 | public synchronized void received(int c) throws IOException { | ||
| 132 | if (!incoming) { | ||
| 133 | out.write("\n<------\n"); | ||
| 134 | incoming = true; | ||
| 135 | out.flush(); | ||
| 136 | } | ||
| 137 | out.write(c); | ||
| 138 | } | ||
| 139 | |||
| 140 | public synchronized void flush() throws IOException { | ||
| 141 | out.flush(); | ||
| 142 | } | ||
| 143 | |||
| 144 | public static HttpCapture getCapture(java.net.URL url) { | ||
| 145 | if (!isInitialized()) { | ||
| 146 | init(); | ||
| 147 | } | ||
| 148 | if (patterns == null || patterns.isEmpty()) { | ||
| 149 | return null; | ||
| 150 | } | ||
| 151 | String s = url.toString(); | ||
| 152 | for (int i = 0; i < patterns.size(); i++) { | ||
| 153 | Pattern p = patterns.get(i); | ||
| 154 | if (p.matcher(s).find()) { | ||
| 155 | String f = capFiles.get(i); | ||
| 156 | File fi; | ||
| 157 | if (f.indexOf("%d") >= 0) { | ||
| 158 | java.util.Random rand = new java.util.Random(); | ||
| 159 | do { | ||
| 160 | String f2 = f.replace("%d", Integer.toString(rand.nextInt())); | ||
| 161 | fi = new File(f2); | ||
| 162 | } while (fi.exists()); | ||
| 163 | } else { | ||
| 164 | fi = new File(f); | ||
| 165 | } | ||
| 166 | return new HttpCapture(fi, url); | ||
| 167 | } | ||
| 168 | } | ||
| 169 | return null; | ||
| 170 | } | ||
| 171 | } | ||