1 |
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2 | sub readin_html
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3 | {
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4 | my ($html_fname) = @_;
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5 |
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6 | open(HIN,"<$html_fname")
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7 | || die "Unable to open $html_fname: $!\n";
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8 |
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9 | my $html_text;
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10 | my $line;
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11 | while (defined ($line=<HIN>)) {
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12 | $html_text .= $line;
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13 | }
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14 | close(HIN);
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15 |
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16 | return $html_text;
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17 | }
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18 |
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19 | sub stripout_anchortags
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20 | {
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21 | my ($html_text) = @_;
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22 |
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23 | my @anchor_tags = ($html_text =~ m/(<a\s+.*?>)+/gs);
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24 |
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25 | return @anchor_tags;
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26 | }
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27 |
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28 |
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29 | sub print_tags
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30 | {
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31 | my (@tags) = @_;
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32 |
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33 | my $a;
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34 | foreach $a ( @tags) {
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35 | print "$a\n";
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36 | }
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37 | }
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38 |
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39 | sub filter_tags
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40 | {
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41 | my ($filter_text,@tags) = @_;
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42 |
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43 | my @filtered_tags = ();
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44 |
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45 | my $t;
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46 | foreach $t (@tags) {
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47 | if ($t =~ m/$filter_text/x) {
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48 | push(@filtered_tags,$t);
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49 | }
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50 | }
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51 |
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52 | return @filtered_tags;
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53 | }
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54 |
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55 | sub extract_urls {
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56 | my (@tags) = @_;
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57 |
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58 | my @urls = ();
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59 |
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60 | my $t;
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61 | foreach $t (@tags) {
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62 | if ($t =~ m/href=([^ ]+)/i) {
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63 | my $url = $1;
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64 | $url =~ s/&/&/g;
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65 | push(@urls,$url);
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66 | }
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67 | }
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68 |
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69 | return @urls;
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70 | }
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71 |
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72 | sub get_gi_page
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73 | {
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74 | my ($cgi_base,$cgi_call,$downloadto_fname) = @_;
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75 |
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76 | my $full_url = "$cgi_base$cgi_call";
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77 |
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78 | if ((!-e $downloadto_fname) || (-z $downloadto_fname)) {
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79 | my $cmd = "wget -nv -T 10 -nc -U \"Mozilla\" -O \"$downloadto_fname\" \"$full_url\"";
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80 | `$cmd`;
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81 | }
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82 |
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83 | if (-z $downloadto_fname) {
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84 | print STDERR "Warning: downloaded file 0 bytes!\n";
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85 | }
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86 | }
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87 |
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88 |
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89 | sub parse_gi_search_page
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90 | {
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91 | my ($ga_base,$search_term_dir,$downloaded_fname,$currpage_url) = @_;
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92 |
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93 | my $nextpage_url = undef;
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94 |
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95 | my @imgref_urls = ();
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96 |
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97 | my $downloaded_text = readin_html($downloaded_fname);
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98 | if (defined $downloaded_text) {
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99 | my @anchor_tags = stripout_anchortags($downloaded_text);
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100 |
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101 | my @thumbimg_tags = filter_tags("imgres\\?",@anchor_tags);
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102 | my @nextpage_tags = filter_tags("images\\?.*?start=\\d+",@anchor_tags);
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103 |
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104 | my @thumbimg_urls = extract_urls(@thumbimg_tags);
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105 | my @nextpage_urls = extract_urls(@nextpage_tags);
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106 |
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107 | my $curr_start = 0;
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108 | if ($currpage_url =~ m/start=(\d+)/) {
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109 | $curr_start = $1;
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110 | }
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111 |
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112 | my $pot_url;
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113 | foreach $pot_url (@nextpage_urls) {
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114 |
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115 | my ($next_start) = ($pot_url =~ m/start=(\d+)/);
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116 | if ($next_start>$curr_start) {
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117 | $nextpage_url = $pot_url;
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118 | last;
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119 | }
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120 | }
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121 |
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122 | # print "-" x 40, "\n";
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123 | my $c = 1;
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124 | my $p = 1;
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125 |
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126 | foreach my $tvu (@thumbimg_urls) {
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127 | my ($img_url) = ($tvu =~ m/imgurl=([^&]*)/);
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128 | $img_url =~ s/%25/%/g;
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129 |
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130 | my ($imgref_url) = ($tvu =~ m/imgrefurl=([^&]*)/);
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131 | ## print STDERR "****imgref_url = $imgref_url\n";
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132 | $imgref_url =~ s/%25/%/g;
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133 |
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134 | my ($img_ext) = ($img_url =~ m/\.(\w+)$/);
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135 | $img_ext = lc($img_ext);
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136 |
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137 | # remove http:// if there, so later we can explicitly add it in
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138 | $img_url =~ s/^http:\/\///;
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139 |
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140 | print "Downloading image url http://$img_url\n";
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141 | my $output_fname = "$search_term_dir/img_$c.$img_ext";
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142 |
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143 | get_gi_page("http://",$img_url,$output_fname);
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144 |
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145 | if (-s $output_fname == 0) {
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146 | unlink $output_fname;
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147 | }
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148 | elsif (system("identify \"$output_fname\"") > 0 ) {
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149 | print STDERR "**** NOT JPEG: output_fname \n";
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150 | unlink $output_fname;
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151 | }
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152 | else {
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153 |
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154 | my $command = "identify \"$output_fname\" 2>&1";
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155 | my $result = `$command`;
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156 |
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157 | my $type = 'unknown';
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158 | my $width = 'unknown';
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159 | my $height = 'unknown';
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160 |
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161 | my $image_safe = quotemeta $output_fname;
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162 | if ($result =~ /^$image_safe (\w+) (\d+)x(\d+)/) {
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163 | $type = $1;
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164 | $width = $2;
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165 | $height = $3;
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166 | }
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167 |
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168 | if (($width ne "unknown") && ($height ne "unknown")) {
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169 | if (($width>200) || ($height>200)) {
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170 | `convert \"$output_fname\" -resize 200x200 /tmp/x.jpg`;
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171 | `/bin/mv /tmp/x.jpg \"$output_fname\"`;
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172 | }
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173 | }
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174 | $c++;
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175 | }
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176 |
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177 | push(@imgref_urls,$imgref_url);
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178 |
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179 | last if ($c==3); # Only take first 2
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180 |
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181 | $p++;
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182 |
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183 | if ($p==20) {
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184 | print STDERR "*** Unable to get enough images after 20 passes\n";
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185 | last;
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186 | }
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187 |
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188 |
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189 | }
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190 |
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191 | if (defined $nextpage_url) {
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192 | print "Next page URL:\n";
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193 | print_tags($nextpage_url);
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194 | }
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195 | # print "-" x 40, "\n";
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196 | }
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197 |
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198 | return ($nextpage_url, \@imgref_urls);
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199 | }
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200 |
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201 | sub make_search_term_safe
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202 | {
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203 | my ($search_terms) = @_;
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204 |
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205 | my $search_term_safe = join("+",@$search_terms);
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206 | $search_term_safe =~ s/\"/%22/g;
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207 | $search_term_safe =~ s/ /+/g;
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208 |
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209 | return $search_term_safe;
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210 | }
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211 |
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212 | sub gi_query_url
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213 | {
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214 | my ($search_term) = @_;
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215 |
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216 | my $search_term_safe = make_search_term_safe($search_term);
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217 |
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218 | my $nextpage_url
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219 | = "/images?as_filetype=jpg&imgc=color\&ie=UTF-8\&oe=UTF-8\&hl=en\&btnG=Google+Search";
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220 | $nextpage_url .= "\&q=$search_term_safe";
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221 |
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222 | return $nextpage_url;
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223 | }
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224 |
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225 | sub gi_url_base
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226 | {
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227 | return "http://images.google.com";
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228 | }
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229 |
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230 | sub giget
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231 | {
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232 | my ($search_terms,$output_dir) = @_;
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233 | my $imgref_urls = [];
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234 |
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235 | if (!-e $output_dir) {
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236 | mkdir($output_dir);
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237 |
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238 | }
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239 |
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240 | print STDERR "Searching Google Images for: ", join(" ",@$search_terms), "\n";
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241 |
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242 | my $gi_base = gi_url_base();
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243 | my $nextpage_url = gi_query_url($search_terms);
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244 |
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245 | $respage_fname = "$output_dir/respage1.html";
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246 | get_gi_page($gi_base,$nextpage_url,$respage_fname);
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247 |
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248 | ($nextpage_url, $imgref_urls)
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249 | = parse_gi_search_page($gi_base,$output_dir,
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250 | $respage_fname,$nextpage_url);
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251 | # else {
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252 | # print STDERR " Images already mirrored\n";
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253 | # }
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254 |
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255 | print STDERR "-" x 40, "\n";
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256 |
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257 | return $imgref_urls;
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258 | }
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259 |
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260 |
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261 | 1;
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