1 | package org.greenstone.atea;
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2 |
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3 |
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4 | import java.io.*;
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5 | import java.nio.charset.StandardCharsets;
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6 | import java.util.Properties;
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7 | import java.util.zip.GZIPInputStream;
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8 | import java.util.Iterator;
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9 | import java.util.HashMap;
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10 | import java.util.Map;
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11 | import java.util.Set;
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12 | import java.util.TreeMap;
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13 | import java.util.TreeSet;
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14 |
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15 | import org.apache.commons.csv.*; // https://commons.apache.org/proper/commons-csv/download_csv.cgi
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16 | import org.apache.log4j.Logger;
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17 |
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18 |
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19 | /**
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20 | * The main() method of this class takes a folder of warc.wet(.gz) files and goes through
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21 | * the WET records in each, putting each WET record into a file. Each file is put into a
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22 | * keep or discard or greyListed folder, and its url listed written into a keep, discard
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23 | * or greylisted text file, based on based on
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24 | *
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25 | * 1. whether it's whitelisted, else greylisted else blacklisted
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26 | * 2. and if explicitly whitelisted or else not greylisted or blacklisted and there's
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27 | * enough content. Formerly, content-length and number of lines were used to determine if
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28 | * the content was sufficient. Now it's just word count and number of MAX characters
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29 | * (not MINIMUM characters) that determine a string is a word. These settings can be adjusted
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30 | * in conf/config.properties.
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31 | *
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32 | * Put a url-blacklist-filter.txt and/or url-greylist-filter.txt and/or url-whitelist-filter.txt
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33 | * into the conf folder to control any url patterns that are explicitly included or excluded or
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34 | * set aside for inspecting later. These filter text files don't use regexes, instead their
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35 | * format is:
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36 | * - precede URL by ^ to blacklist urls that match the given prefix
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37 | * - succeed URL by $ to blacklist urls that match the given suffix
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38 | * - ^url$ will blacklist urls that match the given url completely
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39 | * - Without either ^ or $ symbol, urls containing the given url will get blacklisted
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40 | *
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41 | * WETProcessor.java's current implementation is that explicit whitelisting has precedence
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42 | * over greylisting and which takes precedence over blacklisting in turn. However, even
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43 | * explicitly whitelisted urls still need to have sufficient content to end up in keepURLs.txt
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44 | * and in the seedURLs.txt file used for nutch, along with its domain in regex-urlfilter.txt
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45 | * also for nutch.
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46 | *
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47 | * A CCWETProcessor instance can be configured to process all the .warc.wet(.gz) files
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48 | * in the given input folder. Then use a single instance of the WETProcessor class to process
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49 | * each single unzipped warc.wet file.
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50 | *
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51 | * To compile, including the jars in lib/ for compiling.
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52 | * maori-lang-detection/src$ javac -cp ".:../lib/*" org/greenstone/atea/CCWETProcessor.java
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53 | *
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54 | * To run, passing the log4j and other properties files in conf/ folder:
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55 | * maori-lang-detection/src$ java -cp ".:../conf:../lib/*" org.greenstone.atea.CCWETProcessor <folder containing commoncrawls subfolders containing warc.wet(.gz) files> <outputFolder>
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56 | *
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57 | * e.g. (from maori-lang-detection/src)
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58 | *
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59 | * - java -cp ".:../conf:../lib/*" org.greenstone.atea.CCWETProcessor ../ccrawl-data /Scratch/ak19/gs3-extensions/maori-lang-detection/to_crawl
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60 | * - java -cp ".:../conf:../lib/*" org.greenstone.atea.CCWETProcessor ../ccrawl-data /Scratch/ak19/gs3-extensions/maori-lang-detection/to_crawl 2>&1 | less
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61 | *
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62 | */
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63 |
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64 | public class CCWETProcessor {
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65 | private static Logger logger = Logger.getLogger(org.greenstone.atea.CCWETProcessor.class.getName());
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66 |
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67 | // Properties shared across WETProcessor instances
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68 | public final int MAX_WORD_LENGTH;
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69 | public final int MIN_NUM_WORDS;
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70 | public final int MAX_WORDS_CAMELCASE;
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71 |
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72 | // constants for the possible fixed values in sites-too-big-to-exhaustively-crawl.txt file
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73 | public final String SUBDOMAIN_COPY = "SUBDOMAIN-COPY";
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74 | public final String SINGLEPAGE = "SINGLEPAGE";
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75 | public final String FOLLOW_LINKS_WITHIN_TOPSITE = "FOLLOW-LINKS-WITHIN-TOPSITE";
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76 |
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77 | /**
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78 | * Characters that need escaping if used as a string literal in a regex
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79 | * https://stackoverflow.com/questions/399078/what-special-characters-must-be-escaped-in-regular-expressions
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80 | * https://www.regular-expressions.info/refcharacters.html
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81 | * Put the \\ (escape char) at start so we don't double-escape chars already escaped,
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82 | * as would happen for any chars appearing earlier in this list than \\
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83 | */
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84 | public final String ESCAPE_CHARS_FOR_RE = "\\.^$*+?()[{|";
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85 | //public final String[] ESCAPE_CHARS_FOR_RE = ["\\", ".", "^", "$", "*", "+", "?", "(", ")", "[", "{", "|"];
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86 |
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87 | private Properties configProperties = new Properties();
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88 |
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89 | // File paths shared across WETProcessor instances
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90 | public final File commoncrawlDir;
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91 | public final File outputFolder;
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92 | public final File discardFolder;
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93 | public final File keepFolder;
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94 | public final File greyListedFolder;
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95 | public final File keepURLsFile;
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96 | public final File discardURLsFile;
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97 | public final File greyListedFile;
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98 |
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99 | /** Possible values stored in the blackList/whiteList/greyList Maps */
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100 | private final Integer LIST_ENTRY_CONTAINS = new Integer(0);
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101 | private final Integer LIST_ENTRY_STARTSWITH = new Integer(1);
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102 | private final Integer LIST_ENTRY_ENDSWITH = new Integer(2);
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103 | private final Integer LIST_ENTRY_MATCHES = new Integer(3);
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104 |
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105 | /**
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106 | * Store url patterns as keys and values indicated whether a url should
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107 | * match it exactly, start/end with it, or contain it
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108 | */
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109 | private HashMap<String, Integer> blackList;
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110 | private HashMap<String, Integer> greyList;
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111 | private HashMap<String, Integer> whiteList;
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112 |
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113 | /** map of topsites with allowable regexes: sites too big to exhaustively crawl
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114 | * with optional regex defining allowed exceptions, like subdomains or url suffixes
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115 | * off that top site. For example, wikipedia.org is a topsite, but mi.wikipedia.org
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116 | * is relevant. Or blogspot.com is a top site, but someone's pages in Maori off blogspot
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117 | * would be relevant.
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118 | * The map would store top site domain suffix and an optional regex string for allowable
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119 | * url patterns.
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120 | */
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121 | private HashMap<String, String> topSitesMap;
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122 |
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123 | /** Map of domains we keep and the full urls we're keeping that are of that domain.
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124 | * No need to use a TreeMap which preserves natural (alphabetical) ordering of keys,
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125 | * while a HashMap has no notion of ordering, because we just need to store urls with
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126 | * their domains. Whether the domains are sorted or the urls per domain are sorted becomes
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127 | * irrelevant. (Does it really? What if we have urls followed vs preceded by urls with the
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128 | * same prefix, e.g. pinky.com/toto/index.html and pinky.com/toto/nono/file.html
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129 | * Is there any benefit to nutch when crawling if these seedURLs are ordered or not?)
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130 | */
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131 | private Map<String, Set<String>> domainsToURLsMap;
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132 |
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133 | // Keep a count of all the records that all WETProcessors instantiated
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134 | // by our main method combined have processed
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135 | private int totalRecordCount = 0;
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136 |
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137 | private int wetFileCount = 0;
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138 |
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139 | private static ClassLoader MY_CLASSLOADER = org.greenstone.atea.CCWETProcessor.class.getClassLoader();
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140 |
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141 | public CCWETProcessor(File inFolder, File outFolder) throws Exception {
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142 | this.commoncrawlDir = inFolder;
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143 | this.outputFolder = outFolder;
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144 |
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145 | // load up the properties from the config file
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146 | try (InputStream infile = MY_CLASSLOADER.getResourceAsStream("config.properties")) {
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147 | configProperties = new Properties();
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148 | configProperties.load(infile);
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149 | //infile.close(); // not explicitly called in examples of try-with-resources
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150 |
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151 | } catch(Exception e) {
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152 | error("Exception attempting to read properties from config.properties.", e);
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153 | }
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154 |
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155 | if(configProperties.size() == 0) {
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156 | warn("*** Warning: no values read into config properties. Using defaults.");
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157 | }
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158 |
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159 | MAX_WORD_LENGTH = Integer.parseInt(configProperties.getProperty("WETprocessor.max.word.length", "15"));
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160 | MIN_NUM_WORDS = Integer.parseInt(configProperties.getProperty("WETprocessor.min.num.words", "20"));
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161 | MAX_WORDS_CAMELCASE = Integer.parseInt(configProperties.getProperty("WETprocessor.max.words.camelcase", "10"));
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162 |
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163 |
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164 | this.discardFolder = new File(outFolder, "discard");
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165 | if(!discardFolder.exists()) {
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166 | discardFolder.mkdir();
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167 | }
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168 | this.keepFolder = new File(outFolder, "keep");
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169 | if(!keepFolder.exists()) {
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170 | keepFolder.mkdir();
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171 | }
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172 |
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173 | this.greyListedFolder = new File(outFolder, "greylisted");
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174 | if(!greyListedFolder.exists()) {
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175 | greyListedFolder.mkdir();
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176 | }
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177 |
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178 | this.keepURLsFile = new File(outFolder, "keepURLs.txt");
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179 | if(keepURLsFile.exists() && !keepURLsFile.delete()) {
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180 | throw new Exception("Warning: Unable to delete " + this.keepURLsFile + ". Unable to proceed.");
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181 | }
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182 | this.discardURLsFile = new File(outFolder, "discardURLs.txt");
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183 | if(discardURLsFile.exists() && !discardURLsFile.delete()) {
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184 | throw new Exception ("Warning Unable to delete " + discardURLsFile + ". Unable to proceed.");
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185 | }
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186 | this.greyListedFile = new File(outFolder, "greyListed.txt");
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187 | if(greyListedFile.exists() && !greyListedFile.delete()) {
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188 | throw new Exception ("Warning Unable to delete " + greyListedFile + ". Unable to proceed.");
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189 | }
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190 |
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191 | // prepare our blacklist, greylist (for inspection) and whitelist
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192 | info("Loading blacklist.");
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193 | blackList = new HashMap<String, Integer>();
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194 | initURLFilterList(blackList, "url-blacklist-filter.txt");
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195 |
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196 | info("Loading greylist.");
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197 | greyList = new HashMap<String, Integer>();
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198 | initURLFilterList(greyList, "url-greylist-filter.txt");
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199 |
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200 | info("Loading whitelist.");
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201 | whiteList = new HashMap<String, Integer>();
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202 | initURLFilterList(whiteList, "url-whitelist-filter.txt");
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203 |
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204 | // Create the map of topSites
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205 | info("Loading map of topsites with regex of allowable url patterns for each topsite.");
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206 | topSitesMap = new HashMap<String, String>();
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207 |
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208 | // Read in our csv file of topsites and what to do when one hits a match with a seedURL
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209 | // and put these in our topSitesMap
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210 | // https://commons.apache.org/proper/commons-csv/apidocs/index.html
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211 | // https://commons.apache.org/proper/commons-csv/apidocs/org/apache/commons/csv/CSVParser.html
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212 | //https://commons.apache.org/proper/commons-csv/apidocs/org/apache/commons/csv/CSVFormat.html
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213 | CSVFormat customisedCSVFormat = CSVFormat.DEFAULT
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214 | .withCommentMarker('#')
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215 | .withSkipHeaderRecord()
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216 | .withIgnoreSurroundingSpaces();
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217 |
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218 | File topSitesCSVData = new File(MY_CLASSLOADER.getResource("sites-too-big-to-exhaustively-crawl.txt").getFile());
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219 | // CSVParser is AutoCloseable and throws exceptions, so putting it in a try-with-resources
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220 | try (
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221 | CSVParser parser = CSVParser.parse(topSitesCSVData, StandardCharsets.UTF_8, customisedCSVFormat);
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222 | ) {
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223 | for (CSVRecord csvRecord : parser) {
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224 | String topsite = csvRecord.get(0);
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225 | String allowed_url_pattern = (csvRecord.size() >= 2) ? csvRecord.get(1) : "";
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226 | topSitesMap.put(topsite, allowed_url_pattern);
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227 |
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228 | //debug("@@@@ topsite: " + topsite + " - " + allowed_url_pattern);
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229 |
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230 | }
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231 | } catch(Exception e) {
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232 | error("@@@@@@@@@ Error attempting to parse CSV format of text file " + topSitesCSVData, e);
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233 | }
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234 |
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235 | //debug("Prematurely terminating for testing purposes.");
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236 | //System.exit(-1);
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237 | }
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238 |
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239 | /** Work out the 'domain' for a given url.
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240 | * This retains any www. or subdomain prefix.
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241 | */
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242 | private String getDomainForURL(String url, boolean withProtocol) {
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243 | int startIndex = startIndex = url.indexOf("//"); // for http:// or https:// prefix
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244 | startIndex = (startIndex == -1) ? 0 : (startIndex+2); // skip past the protocol's // portion
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245 | // the keep the URL around in case param withProtocol=true
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246 | String protocol = (startIndex == -1) ? "" : url.substring(0, startIndex);
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247 |
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248 | String domain = url.substring(startIndex);
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249 | int endIndex = domain.indexOf("/");
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250 | if(endIndex == -1) endIndex = domain.length();
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251 | domain = domain.substring(0, endIndex);
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252 |
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253 | if(withProtocol) {
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254 | // now that we have the domain (everything to the first / when there is no protocol)
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255 | // can glue the protocol back on
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256 | domain = protocol + domain;
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257 | }
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258 |
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259 | return domain;
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260 | }
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261 |
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262 | /** Utility function to help escape regex characters in URL to go into regex-urlfilter.txt */
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263 | private String escapeStringForRegex(String str) {
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264 | for(int i = 0; i < ESCAPE_CHARS_FOR_RE.length(); i++) {
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265 | char c = ESCAPE_CHARS_FOR_RE.charAt(i);
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266 | str = str.replace(Character.toString(c), "\\"+c);
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267 | }
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268 | return str;
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269 | }
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270 |
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271 | /**
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272 | * Using the keepURLs.txt file generated by running WETProcessor instances, this produces
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273 | * as output the URL seed list and regex-urlfilter text files required by nutch, see
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274 | * https://cwiki.apache.org/confluence/display/nutch/NutchTutorial
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275 | */
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276 | public void createSeedURLsFiles(File seedURLsFile, File urlFilterFile,
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277 | File domainURLsFile, File topSiteMatchesFile) {
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278 | // Maintain a Map of unique domains mapped to seed urls at that domain
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279 | // TreeSet: by default, "the elements are ordered using their natural ordering"
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280 | // (or by a Comparator provided at set creation time).
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281 | // Whereas HashSet doesn't guarantee ordering.
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282 | // So we get alphabetic sorting for free. And guaranteed log(n) for basic operations.
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283 | // Would be a similar distinction for Maps.
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284 | domainsToURLsMap = new TreeMap<String, Set<String>>();
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285 |
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286 | final String PROTOCOL_REGEX_PREFIX = "+^https?://";
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287 | final String FILTER_REGEX_PREFIX = PROTOCOL_REGEX_PREFIX + "([a-z0-9-]+\\.)*"; // https?://([a-z0-9-]+\.)* for nutch's regex-urlfilter.txt
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288 |
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289 | try (
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290 | BufferedReader reader = new BufferedReader(new FileReader(this.keepURLsFile));
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291 | ) {
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292 |
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293 | // read a URL at a time from urlsFile
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294 | String url = null;
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295 | String domainWithProtocol = null;
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296 | while((url = reader.readLine()) != null) { // readLine removes newline separator
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297 |
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298 | // work out domain. This retains any www. or subdomain prefix
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299 | // passing true to further also retain the http(s) protocol
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300 | domainWithProtocol = getDomainForURL(url, true);
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301 |
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302 | Set<String> urlsSet;
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303 | if(!domainsToURLsMap.containsKey(domainWithProtocol)) {
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304 | urlsSet = new TreeSet<String>();
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305 | urlsSet.add(url);
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306 | domainsToURLsMap.put(domainWithProtocol, urlsSet);
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307 | } else {
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308 | urlsSet = domainsToURLsMap.get(domainWithProtocol);
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309 | urlsSet.add(url);
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310 | }
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311 |
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312 | }
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313 | } catch (IOException ioe) {
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314 | error("@@@@@@@@@ Error reading in urls from file " + this.keepURLsFile, ioe);
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315 | }
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316 |
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317 | // We'd have pruned out duplicates by now and have a sorted list of domains,
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318 | // each of which maps to seed URLs in the commoncrawl for that domain
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319 |
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320 | int domainCount = 0;
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321 | File sitesFolder = new File(outputFolder, "sites");
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322 | if(!sitesFolder.exists()) {
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323 | sitesFolder.mkdir();
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324 | }
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325 | final String FORMATSTR = "%05d";
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326 |
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327 | // write out each domain followed in sequence by all urls we found in that domain
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328 | // (urls with tab up front)
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329 | try (
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330 | // global lists of all domains, seedURLs and regex-urlfilters across all wet files of all commoncrawls
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331 | // Also a global file listing any urls that matched top sites that didn't specify
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332 | // allowed regex patterns
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333 | BufferedWriter domainURLsWriter = new BufferedWriter(new FileWriter(domainURLsFile));
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334 | BufferedWriter seedURLsWriter = new BufferedWriter(new FileWriter(seedURLsFile));
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335 | BufferedWriter urlFilterWriter = new BufferedWriter(new FileWriter(urlFilterFile));
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336 | BufferedWriter topSiteMatchesWriter = new BufferedWriter(new FileWriter(topSiteMatchesFile))
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337 | ) {
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338 |
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339 | // initialise topSiteMatchesFile with some instructional text.
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340 | topSiteMatchesWriter.write("The following domain with seedURLs are on a major/top 500 site\n");
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341 | topSiteMatchesWriter.write("for which no allowed URL pattern regex has been specified.\n");
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342 | topSiteMatchesWriter.write("Specify one for this domain in the tab-spaced sites-too-big-to-exhaustively-crawl.txt file\n");
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343 |
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344 | //Set<Map.Entry<String, Set<String>>> domainsSet = domainsToURLsMap.keySet();
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345 | Set<String> domainsSet = domainsToURLsMap.keySet();
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346 | Iterator<String> domainIterator = domainsSet.iterator();
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347 |
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348 | /*
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349 | // DEBUG
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350 | String value = topSitesMap.get("wikipedia.org");
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351 | if(value == null) {
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352 | debug("### wikipedia.org had null value");
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353 | } else {
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354 | debug("### wikipedia.org had value: " + value);
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355 | } // DEBUG
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356 | */
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357 |
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358 | while(domainIterator.hasNext()) {
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359 | String domainWithProtocol = domainIterator.next();
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360 | // Also get domain without protocol prefix
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361 | int startIndex = domainWithProtocol.indexOf("//"); // http:// or https:// prefix
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362 | startIndex = (startIndex == -1) ? 0 : (startIndex+2); // skip past the protocol's // portion
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363 | String domain = domainWithProtocol.substring(startIndex);
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364 |
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365 | /*if(domain.contains("docs.google.com")) {
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366 | debug("domain with protocol: " + domainWithProtocol);
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367 | debug("domain: " + domain);
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368 | }*/
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369 |
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370 | String allowedURLPatternRegex = isURLinTopSitesMap(domain);
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371 | // If the domain is of a topsite for which no allowed URL pattern has been provided
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372 | // in sites-too-big-to-exhaustively-crawl.txt,
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373 | // then we don't know how to crawl the site. Warn the user by writing the affected
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374 | // domain and seedURLs to the topSiteMatchesFile.
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375 | if(allowedURLPatternRegex != null && allowedURLPatternRegex.equals("")) {
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376 |
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377 | // topsite, but we don't (yet) know what portion can be crawled
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378 | // Append the top site and url to a global/toplevel file that
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379 | // the user needs to check later and we're done with this domain as it
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380 | // won't go into any other file hereafter
|
---|
381 |
|
---|
382 | Set<String> urlsForDomainSet = domainsToURLsMap.get(domainWithProtocol);
|
---|
383 | for(String url : urlsForDomainSet) {
|
---|
384 | topSiteMatchesWriter.write("\t" + url + "\n");
|
---|
385 | }
|
---|
386 |
|
---|
387 | continue; // done with this domain
|
---|
388 | }
|
---|
389 |
|
---|
390 | // start counting the domains we're actually going to process
|
---|
391 | domainCount++;
|
---|
392 |
|
---|
393 | String siteID = String.format(FORMATSTR, domainCount);
|
---|
394 | File domainFolder = new File(sitesFolder, siteID);
|
---|
395 | domainFolder.mkdir();
|
---|
396 |
|
---|
397 | // write out the domain
|
---|
398 | //seedURLsWriter.write(domainWithProtocol + "\n");
|
---|
399 |
|
---|
400 |
|
---|
401 | // for every domain, we need a sites/0000x/ folder, where x is domain#, containing
|
---|
402 | // its own INDIVIDUAL seedURLs.txt and regex-urlfilter.txt
|
---|
403 | // We still have a global seedURLs.txt and regex-urlfilter.txt too.
|
---|
404 | File siteSeedsFile = new File(domainFolder, "seedURLs.txt"); // e.g. sites/00001/seedURLs.txt
|
---|
405 | File siteRegexFile = new File(domainFolder, "regex-urlfilter.txt"); // e.g. sites/00001/regex-urlfilter.txt
|
---|
406 | try (
|
---|
407 | BufferedWriter siteURLsWriter = new BufferedWriter(new FileWriter(siteSeedsFile));
|
---|
408 | BufferedWriter siteRegexWriter = new BufferedWriter(new FileWriter(siteRegexFile));
|
---|
409 | ) {
|
---|
410 |
|
---|
411 | // write all sorted unique domains into global domains file
|
---|
412 | // Using the domain withuot protocol since the global domains file is for
|
---|
413 | // informational purposes
|
---|
414 | domainURLsWriter.write(domain + "\n");
|
---|
415 |
|
---|
416 | // Only write urls and no domain into single global seedurls file
|
---|
417 | // But write domain and tabbed urls into individual sites/0000#/seedURLs.txt
|
---|
418 | // files (and write regexed domain into each sites/0000#/regex-urlfilter.txt)
|
---|
419 | // If we ever run nutch on a single seedURLs listing containing
|
---|
420 | // all seed pages to crawl sites from, the above two files will work for that.
|
---|
421 |
|
---|
422 | // first write out the urls for the domain into the sites/0000x/seedURLs.txt file
|
---|
423 | // also write into the global seeds file (with a tab prefixed to each?)
|
---|
424 | Set<String> urlsForDomainSet = domainsToURLsMap.get(domainWithProtocol);
|
---|
425 | for(String url : urlsForDomainSet) {
|
---|
426 | seedURLsWriter.write(url + "\n"); // global seedURLs file
|
---|
427 | siteURLsWriter.write(url + "\n");
|
---|
428 | }
|
---|
429 |
|
---|
430 |
|
---|
431 | if(allowedURLPatternRegex == null) { // entire site can be crawled
|
---|
432 | siteURLsWriter.write(domainWithProtocol + "\n");
|
---|
433 |
|
---|
434 | // Write out filter in the following form for a site, e.g. for nutch.apache.org:
|
---|
435 | // nutch.apache.org => +^https?://([a-z0-9-]+\.)*nutch\.apache\.org/
|
---|
436 | String regexed_domain = FILTER_REGEX_PREFIX + escapeStringForRegex(domain) + "/";
|
---|
437 | //String regexed_domain = FILTER_REGEX_PREFIX + domain.replace(".", "\\.") + "/";
|
---|
438 | urlFilterWriter.write(regexed_domain + "\n"); //global file
|
---|
439 | siteRegexWriter.write(regexed_domain + "\n"); // site file
|
---|
440 | }
|
---|
441 | else { // domain belongs to a top site where only portion of site can be crawled
|
---|
442 |
|
---|
443 | if(allowedURLPatternRegex.equals(SUBDOMAIN_COPY)) { // COPY existing domain as url-filter
|
---|
444 | siteURLsWriter.write(domainWithProtocol + "\n");
|
---|
445 | // e.g. pinky.blogspot.com will add a filter for pinky.blogspot.com
|
---|
446 | // and not for all of blogspot.com
|
---|
447 |
|
---|
448 | String regexed_domain = PROTOCOL_REGEX_PREFIX+escapeStringForRegex(domain) + "/";
|
---|
449 | //String regexed_domain = PROTOCOL_REGEX_PREFIX+domain.replace(".", "\\.") + "/";
|
---|
450 | urlFilterWriter.write(regexed_domain + "\n");
|
---|
451 | siteRegexWriter.write(regexed_domain + "\n");
|
---|
452 |
|
---|
453 | } else if(allowedURLPatternRegex.equals(SINGLEPAGE)) {
|
---|
454 | // don't write out domain. We want individual pages
|
---|
455 | //DON'T DO THIS HERE: siteURLsWriter.write(domainWithProtocol + "\n");
|
---|
456 |
|
---|
457 | // don't write out domain as a regex expression url filter either,
|
---|
458 | // write out the individual seed urls for the domain instead
|
---|
459 | // since we will only be downloading the single page
|
---|
460 |
|
---|
461 | urlsForDomainSet = domainsToURLsMap.get(domainWithProtocol);
|
---|
462 | for(String urlInDomain : urlsForDomainSet) {
|
---|
463 | // don't append slash to end this time
|
---|
464 | String regexed_url = "+^"+escapeStringForRegex(urlInDomain);
|
---|
465 | //String regexed_url = "+^"+urlInDomain.replace(".", "\\.");
|
---|
466 | urlFilterWriter.write(regexed_url + "\n");
|
---|
467 | siteRegexWriter.write(regexed_url + "\n");
|
---|
468 | }
|
---|
469 | } else if(allowedURLPatternRegex.equals(FOLLOW_LINKS_WITHIN_TOPSITE)) {
|
---|
470 |
|
---|
471 | // DON'T write out domain into siteURLs file,
|
---|
472 | // BUT DO write it into urlFilter file
|
---|
473 | String regexed_domain = PROTOCOL_REGEX_PREFIX + escapeStringForRegex(domain) + "/";
|
---|
474 |
|
---|
475 | urlFilterWriter.write(regexed_domain + "\n");
|
---|
476 | siteRegexWriter.write(regexed_domain + "\n");
|
---|
477 | } else { // allowedURLPatternRegex is a url-form - convert to regex
|
---|
478 | if(!allowedURLPatternRegex.endsWith("/")) {
|
---|
479 | allowedURLPatternRegex += "/";
|
---|
480 | }
|
---|
481 | String regexed_pattern = PROTOCOL_REGEX_PREFIX+escapeStringForRegex(allowedURLPatternRegex);
|
---|
482 | //String regexed_pattern = PROTOCOL_REGEX_PREFIX+allowedURLPatternRegex.replace(".", "\\.");
|
---|
483 | siteURLsWriter.write(domainWithProtocol + "\n");
|
---|
484 | urlFilterWriter.write(regexed_pattern + "\n");
|
---|
485 | siteRegexWriter.write(regexed_pattern + "\n");
|
---|
486 |
|
---|
487 | }
|
---|
488 | }
|
---|
489 |
|
---|
490 | } catch (IOException ioe) {
|
---|
491 | error("@@@@@@@@@ Error writing to one of:" + siteSeedsFile + " or " + siteRegexFile, ioe);
|
---|
492 | }
|
---|
493 |
|
---|
494 | }
|
---|
495 |
|
---|
496 | } catch (IOException ioe) {
|
---|
497 | error("\n@@@@@@@@@ Error writing to one of:\n\t" + seedURLsFile
|
---|
498 | + "\n\t" + urlFilterFile
|
---|
499 | + "\n\t" + domainURLsFile
|
---|
500 | + "\n\t" + topSiteMatchesFile, ioe);
|
---|
501 | }
|
---|
502 |
|
---|
503 | /*
|
---|
504 | // BEGIN DEBUG
|
---|
505 | debug("@@@@ TopSitesMap contains: ");
|
---|
506 | for(Map.Entry<String, String> entry : topSitesMap.entrySet()) {
|
---|
507 | String topSite = entry.getKey();
|
---|
508 | String urlPattern = entry.getValue();
|
---|
509 | debug(topSite + " - " + urlPattern);
|
---|
510 | } // END DEBUG
|
---|
511 | */
|
---|
512 | }
|
---|
513 |
|
---|
514 | private String stripSubDomain(String url) {
|
---|
515 | int index = url.indexOf(".");
|
---|
516 | if(index != -1) {
|
---|
517 | url = url.substring(index+1);
|
---|
518 | }
|
---|
519 | return url;
|
---|
520 | }
|
---|
521 |
|
---|
522 |
|
---|
523 | /**
|
---|
524 | * @return true when a seedURL's domain exactly matches a topsite such as blogspot.com,
|
---|
525 | * with or without www. prefix. This method tests for such as case as it would be dangerous
|
---|
526 | * to do a SUBDOMAIN-COPY on such a site and thereby crawl that entire domain.
|
---|
527 | */
|
---|
528 | private boolean isExactDomainMatch(String seedURLDomain, String domain) {
|
---|
529 | // check for an exact match as-is
|
---|
530 | if(seedURLDomain.equals(domain)) {
|
---|
531 | return true;
|
---|
532 | }
|
---|
533 |
|
---|
534 | // else check if with or without a www. prefix we have an exact match with domain
|
---|
535 | if(seedURLDomain.startsWith("www.")) {
|
---|
536 | if(seedURLDomain.substring(4).equals(domain)) {
|
---|
537 | return true;
|
---|
538 | }
|
---|
539 | } else {
|
---|
540 | if(domain.equals("www."+seedURLDomain)) {
|
---|
541 | return true;
|
---|
542 | }
|
---|
543 | }
|
---|
544 |
|
---|
545 | return false;
|
---|
546 | }
|
---|
547 |
|
---|
548 |
|
---|
549 | /**
|
---|
550 | * Check if the domain of the seedurl, either in its entirety or when stripped of
|
---|
551 | * www/subdomains, is in the list of top sites.
|
---|
552 | * If it is, and the given url matches the regex for that topsite, then add the url to the
|
---|
553 | * whitelist and a regex disallowing the rest of the topsite to the url regex filter file.
|
---|
554 | * @param fullSeedDomain: domain of seedURL without the protocol. May include www. prefix.
|
---|
555 | * @return one of the following values:
|
---|
556 | * - This function returns null if the seedURL's domain does not match any of the topsites.
|
---|
557 | * - The empty String is returned if the seedURL's domain matched a topsite but no (allowed-
|
---|
558 | * url-pattern) value was defined for it. The empty String is also returned if the seedURL's
|
---|
559 | * domain exactly matched a topsite and had a value of SUBDOMAIN-COPY, because we still don't
|
---|
560 | * want to blindly crawl a topsite (as would happen with SUBDOMAIN-COPY).
|
---|
561 | * - A non-emptry String is returned if the seedURL's domain matched a topsite and a value
|
---|
562 | * was defined for it. (The value will be one of "SUBDOMAIN-COPY", "SINGLEPAGE" or an allowed
|
---|
563 | * URL pattern.
|
---|
564 | */
|
---|
565 | private String isURLinTopSitesMap(String fullSeedDomain) {
|
---|
566 | boolean keepLooping = true;
|
---|
567 |
|
---|
568 | String domain = fullSeedDomain;
|
---|
569 |
|
---|
570 | // domain aprameter will have retained www or subdomains, but is stripped of protocol
|
---|
571 |
|
---|
572 | // keep looping, stripping subdomains from url and checking if it matches a topsite domain
|
---|
573 | // if it does, return the value for that topsite domain in the topSitesMap
|
---|
574 | // If no match at all, return null.
|
---|
575 | do {
|
---|
576 |
|
---|
577 | String allowed_url_pattern = topSitesMap.get(domain);
|
---|
578 | if(allowed_url_pattern != null) { // if topSitesMap.containsKey(domain);
|
---|
579 | // there's an entry for the URL in the topSitesMap
|
---|
580 | debug("##### A top site matches URL domain " + domain);
|
---|
581 |
|
---|
582 | // if we're dealing with SUBDOMAIN-COPY, then the fullSeedDomain, with or without
|
---|
583 | // www prefix, should not exactly match the topSitesMap domain
|
---|
584 | // e.g. we don't want to crawl a seed URL with domain www.blogspot.com
|
---|
585 | // despite it matching topsite blogspot.com with a value of SUBDOMAIN-COPY.
|
---|
586 |
|
---|
587 | if(allowed_url_pattern.equals(SUBDOMAIN_COPY) && isExactDomainMatch(fullSeedDomain, domain)) {
|
---|
588 | return ""; // means don't crawl site, write url into unprocessed-topsite-matches file
|
---|
589 | }
|
---|
590 | return allowed_url_pattern;
|
---|
591 | }
|
---|
592 | // else, no entry for the URL in the topSitesMap
|
---|
593 | // We're not done yet: strip subDomain from URL and check it against topSitesMap again
|
---|
594 |
|
---|
595 | String newDomain = stripSubDomain(domain);
|
---|
596 | if(domain.equals(newDomain)) {
|
---|
597 | keepLooping = false;
|
---|
598 | } else {
|
---|
599 | domain = newDomain;
|
---|
600 | }
|
---|
601 | } while(keepLooping);
|
---|
602 |
|
---|
603 | // url in entirety or stripped of subdomains did not match any of the topsites
|
---|
604 | return null;
|
---|
605 | }
|
---|
606 |
|
---|
607 | private boolean isListedInFilterList(Map<String, Integer> filterListMap, String url) {
|
---|
608 | //Set<Map.Entry<String,Integer>> entries = filterListMap.entrySet();
|
---|
609 | //Iterator<Map.Entry<String, Integer>> i = entries.iterator();
|
---|
610 | //while(i.hasNext()) {
|
---|
611 | // Map.Entry<String, Integer> entry = i.next();
|
---|
612 | for(Map.Entry<String,Integer> entry : filterListMap.entrySet()) {
|
---|
613 | String urlPattern = entry.getKey();
|
---|
614 | Integer matchRule = entry.getValue();
|
---|
615 |
|
---|
616 | if(matchRule == LIST_ENTRY_CONTAINS && url.contains(urlPattern)) {
|
---|
617 | return true;
|
---|
618 | }
|
---|
619 | else if(matchRule == LIST_ENTRY_STARTSWITH && url.startsWith(urlPattern)) {
|
---|
620 | return true;
|
---|
621 | }
|
---|
622 | else if(matchRule == LIST_ENTRY_ENDSWITH && url.endsWith(urlPattern)) {
|
---|
623 | return true;
|
---|
624 | }
|
---|
625 | else if(matchRule == LIST_ENTRY_MATCHES && url.equals(urlPattern)) {
|
---|
626 | return true;
|
---|
627 | }
|
---|
628 | // else check the rest of the filter list against this url
|
---|
629 | // before returning false to be certain it's not been listed in the filter list
|
---|
630 | }
|
---|
631 |
|
---|
632 | return false;
|
---|
633 | }
|
---|
634 |
|
---|
635 | /**
|
---|
636 | * Returns true if the url or pattern is found in the blacklist file.
|
---|
637 | * Note that if eventually the same url pattern is found in the greylist or whitelist too,
|
---|
638 | * it won't get blacklisted after all. But that's not implemented here.
|
---|
639 | */
|
---|
640 | public boolean isBlacklisted(String url) {
|
---|
641 | boolean isBlackListed = isListedInFilterList(blackList, url);
|
---|
642 |
|
---|
643 | // if any portion of the URL contains the word "livejasmin", or even "jasmin" actually,
|
---|
644 | // then it's an adult site, so blacklist the entire domain if it wasn't already blacklisted
|
---|
645 | String domainWithoutProtocol = getDomainForURL(url, false); // remove protocol
|
---|
646 | if(!isBlackListed && url.contains("jasmin")) {
|
---|
647 | warn("### Blacklisting additional domain (likely an adult site): " + domainWithoutProtocol);
|
---|
648 | blackList.put(domainWithoutProtocol, LIST_ENTRY_CONTAINS);
|
---|
649 | }
|
---|
650 | return isBlackListed;
|
---|
651 | }
|
---|
652 |
|
---|
653 | /**
|
---|
654 | * Returns true if the url or pattern is explicitly mentioned in the greylist file.
|
---|
655 | * Will eventually take precedence over if the same URL pattern was mentioned in the blacklist.
|
---|
656 | * Will eventually be pre-empted into the whitelist if mentioned in the whitelist.
|
---|
657 | */
|
---|
658 | public boolean isGreylisted(String url) {
|
---|
659 | // auto-translated product sites
|
---|
660 | return isListedInFilterList(greyList, url);
|
---|
661 | }
|
---|
662 |
|
---|
663 | /**
|
---|
664 | * Returns true if the url or pattern is explicitly mentioned in the whitelist file
|
---|
665 | * Its mention in a whitelist moreover overrides any mention in the blacklist and greylist.
|
---|
666 | */
|
---|
667 | public boolean isWhitelisted(String url) {
|
---|
668 | return isListedInFilterList(whiteList, url);
|
---|
669 | }
|
---|
670 |
|
---|
671 | /**
|
---|
672 | * Checks URL parameter against each line ("filter") of conf/url-black|grey|whitelist-filter.txt to decide
|
---|
673 | * whether it is in the mentioned black|grey|white list.
|
---|
674 | * Filters don't represent actual regex, just ^ and $ as start and end terminators.
|
---|
675 | * By not having this method deal with actual regex for filters, this has the advantage that
|
---|
676 | * we don't have to remember to escape or double escape each filter to turn it into a regex.
|
---|
677 | */
|
---|
678 | public void initURLFilterList(Map<String, Integer> list, String filterListFilename) {
|
---|
679 |
|
---|
680 | // if filterListFilename does not exist in the conf folder, just return
|
---|
681 | if(MY_CLASSLOADER.getResource(filterListFilename) == null) {
|
---|
682 | warn("Filter list filename: " + filterListFilename + " does not exist");
|
---|
683 | return;
|
---|
684 | }
|
---|
685 |
|
---|
686 | try (
|
---|
687 | BufferedReader reader = new BufferedReader(new InputStreamReader(MY_CLASSLOADER.getResourceAsStream(filterListFilename), "UTF-8"));
|
---|
688 | ) {
|
---|
689 | String filter = null;
|
---|
690 | while((filter = reader.readLine()) != null) {
|
---|
691 | // skip comments and empty lines
|
---|
692 | filter = filter.trim();
|
---|
693 | if(filter.equals("") || filter.startsWith("#")) {
|
---|
694 | continue;
|
---|
695 | }
|
---|
696 |
|
---|
697 | if(filter.startsWith("^") && filter.endsWith("$")) {
|
---|
698 | filter = filter.substring(1, filter.length()-1);
|
---|
699 | list.put(filter, LIST_ENTRY_MATCHES);
|
---|
700 | }
|
---|
701 | else if(filter.startsWith("^")) {
|
---|
702 | filter = filter.substring(1);
|
---|
703 | list.put(filter, LIST_ENTRY_STARTSWITH);
|
---|
704 | //debug("Match filter startswith: " + filter);
|
---|
705 | }
|
---|
706 | else if(filter.endsWith("$")) {
|
---|
707 | filter = filter.substring(0, filter.length()-1);
|
---|
708 | list.put(filter, LIST_ENTRY_ENDSWITH);
|
---|
709 | //debug("@@@ Match filter endswith: " + filter);
|
---|
710 | }
|
---|
711 | else {
|
---|
712 | list.put(filter, LIST_ENTRY_CONTAINS);
|
---|
713 | }
|
---|
714 | //debug("Got filter: " + filter);
|
---|
715 | }
|
---|
716 |
|
---|
717 | } catch (IOException ioe) {
|
---|
718 | error("@@@@@@@@@ Error reading into map from file " + filterListFilename, ioe);
|
---|
719 | }
|
---|
720 |
|
---|
721 | }
|
---|
722 |
|
---|
723 | /** Maintain a count of all WET files processed. */
|
---|
724 | public void setWETFileCount(int count) { this.wetFileCount = count; }
|
---|
725 |
|
---|
726 | /** Maintain a count of all WET records processed. */
|
---|
727 | //public int getRecordCount() { return this.totalRecordCount; }
|
---|
728 | //public void addToRecordCount(int count) { this.totalRecordCount += count; }
|
---|
729 | public void setRecordCount(int count) { this.totalRecordCount = count; }
|
---|
730 |
|
---|
731 | public void processAllWETFilesOfCrawl(File ccrawlWETFileDir) {
|
---|
732 |
|
---|
733 | // Will list all the warc.wet files in the input directory or else their gzipped versions
|
---|
734 | File[] WETFiles = ccrawlWETFileDir.listFiles(new WETFilenameFilter());
|
---|
735 |
|
---|
736 | int wetRecordCount = 0;
|
---|
737 | int wetFileCount = 0;
|
---|
738 |
|
---|
739 | for(int i = 0; i < WETFiles.length; i++) {
|
---|
740 | File WETFile = WETFiles[i];
|
---|
741 | debug("Processing WETfile: " + WETFile);
|
---|
742 |
|
---|
743 | // Any .gz files listed means they haven't been unzipped yet. So unzip.
|
---|
744 | String WETFilename = WETFile.toString();
|
---|
745 | if(WETFilename.endsWith(".gz")) {
|
---|
746 | File GZippedWETFile = WETFile;
|
---|
747 | String WETGZippedFilename = WETFilename;
|
---|
748 | WETFilename = WETFilename.substring(0, WETFilename.lastIndexOf(".gz"));
|
---|
749 |
|
---|
750 | WETFile = new File(WETFilename);
|
---|
751 | Utility.unzipFile(GZippedWETFile, WETFile);
|
---|
752 | }
|
---|
753 | // hereafter all WETFiles should refer to the unzipped version
|
---|
754 | // Check the unzipped WETFile exists
|
---|
755 |
|
---|
756 | if(!WETFile.exists() || !WETFile.isFile()) {
|
---|
757 | error("Error: " + WETFile + " does not exist (failure to unzip?)");
|
---|
758 | return;
|
---|
759 | }
|
---|
760 |
|
---|
761 | // Finally, we can process this WETFile's records into the keep and discard pile
|
---|
762 | wetFileCount++;
|
---|
763 | debug("Off to process " + WETFile);
|
---|
764 | String crawlID = ccrawlWETFileDir.getName(); // something like CC-MAIN-YYYY-##-wet-files
|
---|
765 | crawlID = crawlID.substring("CC-MAIN-".length(), crawlID.indexOf("-wet-files")); // YYYY-##
|
---|
766 | WETProcessor wetFileProcessor = new WETProcessor(WETFile, crawlID, this);
|
---|
767 | wetFileProcessor.processWETFile();
|
---|
768 | wetRecordCount += wetFileProcessor.getRecordCount();
|
---|
769 | }
|
---|
770 |
|
---|
771 | // for information purposes
|
---|
772 | this.setWETFileCount(wetFileCount);
|
---|
773 | this.setRecordCount(wetRecordCount);
|
---|
774 | }
|
---|
775 |
|
---|
776 |
|
---|
777 | // --------------- STATIC METHODS AND INNER CLASSED USED BY MAIN -------------- //
|
---|
778 | public static void info(String msg) {
|
---|
779 | System.err.println(msg);
|
---|
780 | logger.info(msg);
|
---|
781 | }
|
---|
782 | public static void debug(String msg) {
|
---|
783 | System.err.println(msg);
|
---|
784 | logger.debug(msg);
|
---|
785 | }
|
---|
786 | public static void warn(String msg) {
|
---|
787 | System.err.println(msg);
|
---|
788 | logger.warn(msg);
|
---|
789 | }
|
---|
790 | public static void error(String msg) {
|
---|
791 | System.err.println(msg);
|
---|
792 | logger.error(msg);
|
---|
793 | }
|
---|
794 | public static void error(String msg, Exception e) {
|
---|
795 | logger.error(msg, e);
|
---|
796 | System.err.println("\n"+msg);
|
---|
797 | e.printStackTrace();
|
---|
798 | }
|
---|
799 |
|
---|
800 | public static void printUsage() {
|
---|
801 | info("Run this program as:");
|
---|
802 | info("\tWetProcessor <folder containing wet(.gz) files> <output folder path>");
|
---|
803 | }
|
---|
804 |
|
---|
805 | /** Filename filter to only list warc.wet files or else warc.wet.gz files
|
---|
806 | * for which unzipped warc.wet equivalents don't yet exist.
|
---|
807 | */
|
---|
808 | private static class WETFilenameFilter implements FilenameFilter {
|
---|
809 |
|
---|
810 | public boolean accept(File dir, String name) {
|
---|
811 | if(name.endsWith(".warc.wet")) {
|
---|
812 | debug("Will include " + name + " for processing.");
|
---|
813 | return true;
|
---|
814 | }
|
---|
815 |
|
---|
816 | if(name.endsWith(".warc.wet.gz")) {
|
---|
817 | String nameWithoutGZext = name.substring(0, name.lastIndexOf(".gz"));
|
---|
818 | File unzippedVersion = new File(dir, nameWithoutGZext);
|
---|
819 | if(unzippedVersion.exists()) {
|
---|
820 | debug("--- Unzipped version " + unzippedVersion + " exists.");
|
---|
821 | debug("Skipping " + name);
|
---|
822 | return false; // don't count gzipped version if unzipped version exists.
|
---|
823 | }
|
---|
824 | else {
|
---|
825 | debug("Only zipped version " + name + " exists.");
|
---|
826 | return true; // No unzipped version, so have to work with gzipped version
|
---|
827 | }
|
---|
828 | }
|
---|
829 |
|
---|
830 | // we're not even interested in any other file extensions
|
---|
831 | debug("Not a WET file. Skipping " + name);
|
---|
832 | return false;
|
---|
833 | }
|
---|
834 | }
|
---|
835 |
|
---|
836 |
|
---|
837 | private static class CCrawlWETFolderFilenameFilter implements FilenameFilter {
|
---|
838 |
|
---|
839 | public boolean accept(File dir, String name) {
|
---|
840 | File f = new File (dir, name);
|
---|
841 | if(f.isDirectory()) {
|
---|
842 | if(name.matches("CC-MAIN-\\d{4}-\\d{2}-wet-files")) {
|
---|
843 | return true;
|
---|
844 | }
|
---|
845 | }
|
---|
846 | else {
|
---|
847 | info("File " + f + " is not a directory");
|
---|
848 | }
|
---|
849 | return false;
|
---|
850 | }
|
---|
851 | }
|
---|
852 |
|
---|
853 | public static void main(String[] args) {
|
---|
854 | if(args.length != 2) {
|
---|
855 | printUsage();
|
---|
856 | return;
|
---|
857 | }
|
---|
858 |
|
---|
859 | File commoncrawlDir = new File(args[0]);
|
---|
860 | if(!commoncrawlDir.exists() || !commoncrawlDir.isDirectory()) {
|
---|
861 | error("Error: " + args[0] + " does not exist or is not a directory");
|
---|
862 | return;
|
---|
863 | }
|
---|
864 |
|
---|
865 | File outFolder = new File(args[1]);
|
---|
866 | if(!outFolder.exists() || !outFolder.isDirectory()) {
|
---|
867 | error("Error: " + args[1] + " does not exist or is not a directory.");
|
---|
868 | return;
|
---|
869 | }
|
---|
870 |
|
---|
871 | try {
|
---|
872 | CCWETProcessor ccWETFilesProcessor = new CCWETProcessor(commoncrawlDir, outFolder);
|
---|
873 |
|
---|
874 | File[] ccrawlFolders = commoncrawlDir.listFiles(new CCrawlWETFolderFilenameFilter());
|
---|
875 |
|
---|
876 | for(int i = 0; i < ccrawlFolders.length; i++) {
|
---|
877 | File ccrawlFolder = ccrawlFolders[i];
|
---|
878 | info("About to process commoncrawl WET files folder: " + ccrawlFolder);
|
---|
879 | ccWETFilesProcessor.processAllWETFilesOfCrawl(ccrawlFolder);
|
---|
880 | }
|
---|
881 |
|
---|
882 | // create the global files of all domains, seedURLs and regex-urlfilters across all wet files of all commoncrawls
|
---|
883 | // The former is the only unique one. seedURLs and regex-urlfilters are
|
---|
884 | // repeated on a per site/domain basis too, stored in the sites folder
|
---|
885 | File seedURLsFile = new File(outFolder, "seedURLs.txt");
|
---|
886 | File urlFilterFile = new File(outFolder, "regex-urlfilter.txt");
|
---|
887 | File domainURLsFile = new File(outFolder, "all-domain-urls.txt");
|
---|
888 | File topSitesMatchedFile = new File(outFolder, "unprocessed-topsite-matches.txt");
|
---|
889 |
|
---|
890 | ccWETFilesProcessor.createSeedURLsFiles(seedURLsFile, urlFilterFile, domainURLsFile, topSitesMatchedFile);
|
---|
891 |
|
---|
892 | info("\n*** Inspect urls in greylist at " + ccWETFilesProcessor.greyListedFile + "\n");
|
---|
893 |
|
---|
894 | info("\n*** Check " + topSitesMatchedFile + " for sites not prepared for crawling because they matched top sites for which no regex of allowed url patterns were specified in sites-too-big-to-exhaustively-crawl.txt.\n");
|
---|
895 |
|
---|
896 |
|
---|
897 | } catch(Exception e) {
|
---|
898 | // can get an exception when instantiating CCWETProcessor instance
|
---|
899 | error(e.getMessage(), e);
|
---|
900 | }
|
---|
901 |
|
---|
902 | return;
|
---|
903 |
|
---|
904 | }
|
---|
905 | }
|
---|