1: #!/usr/bin/perl -w
2:
3: use strict;
4: use XML::SAX;
5: use XML::LibXML;
6: use DBI;
7:
8: use lib '/usr/local/mpiwg/archive';
9: use MPIWGStor;
10: use HarvestmetaHandler;
11:
12: # make output unbuffered
13: $|=1;
14:
15: #######################################################
16: # internal parameters
17: #
18:
19: # program version
20: my $version = "0.3 (27.9.2004)";
21:
22: # read command line parameters
23: my $args = MPIWGStor::parseargs;
24:
25: if (! scalar(%$args)) {
26: print "harvestmeta $version\n";
27: print "use: harvestmeta -path=dir\n";
28: print " reads all metadata info from directory dir into the database\n";
29: print "alternative sources:\n";
30: print " -indexurl=url : read XML index and follow links\n";
31: print " -singleurl=url : read single index file\n";
32: print "additional options:\n";
33: print " -baseurl=url : clean all URL sources relative to this base\n";
34: print " -debug : output debugging info\n";
35: print " -purgedb : clear whole database\n";
36: exit 1;
37: }
38:
39: # debug level
40: $debug = (exists $$args{'debug'}) ? $$args{'debug'} : 0;
41:
42: # XML namespace (not really implemented!)
43: my $namespace = "";
44:
45: # delete and rebuild database
46: my $purgeDB = (exists $$args{'purgedb'});
47:
48: # database connection
49: my $dbh = DBI->connect("dbi:Pg:dbname=storage", "archiver", "");
50: if (! $dbh) {
51: logger('ABORT', "unable to connect to database!");
52: exit 1;
53: }
54: $dbh->{AutoCommit} = 0;
55: my $dbNextFileId;
56: my $dbNewFile;
57: my $dbNewMeta;
58: my $dbClearMeta;
59: my $dbFindFileName;
60: my $dbFindFilePath;
61: my $dbClearFile;
62: my $dbFindFileFlag;
63: my $dbFindFileFlagPath;
64: my $dbSetFileFlag;
65: my $dbClearAllFileFlag;
66:
67: #######################################################
68: # check parameters that were passed to the program
69: #
70: my $baseurl;
71: my $indexurl;
72: my $singleurl;
73: my $basedir = $$args{'path'};
74: if ($basedir) {
75: # strip trailing slashes
76: $basedir =~ s/\/$//;
77: if (! -d $basedir) {
78: logger("ABORT", "document directory \'$basedir\' doesn't exist!");
79: exit 1;
80: }
81: } else {
82: # use URL
83: $baseurl = $$args{'baseurl'};
84: $indexurl = $$args{'indexurl'};
85: $singleurl = $$args{'url'};
86: if (! (($indexurl)||($singleurl))) {
87: logger("ABORT", "no document source given!");
88: exit 1;
89: }
90: }
91:
92: my $metaParserHandler = HarvestmetaHandler->new;
93: my $metaParser = XML::SAX::ParserFactory->parser(Handler => $metaParserHandler);
94:
95: #######################################################
96: # internal variables
97: #
98:
99: # number of errors
100: my $errcnt = 0;
101: # number of warnings
102: my $warncnt = 0;
103:
104: # number of files on fs
105: my $fcnt = 0;
106: # number of index files
107: my $idxcnt = 0;
108:
109: #######################################################
110: # subroutines
111: #
112:
113: #
114: # readAllFiles($realdir, $basedir, \%files, \%dirs)
115: #
116: # reads all files and directories below $realdir and puts the
117: # files in %files and directories in %dirs
118: # $basedir is only for recursion, it should be empty when called
119: # from outside
120: #
121: sub readAllFiles {
122: my ($directory, $basedir) = @_;
123: my $cnt = 0;
124:
125: if (! opendir DIR, $directory) {
126: return 0;
127: }
128: my @dirfiles = readdir DIR;
129: foreach my $fn (@dirfiles) {
130: # ignore names starting with a dot
131: next if ($fn =~ /^\./);
132: # ignore other silly files
133: next if ($junk_files{$fn});
134:
135: $cnt++;
136: $fcnt++;
137: my $f = "$directory/$fn";
138: my $docf = ($basedir) ? "$basedir/$fn" : $fn;
139: #logger('DEBUG', "fs_file: \"$f\"");
140: if (-f $f) {
141: #logger(" is file");
142: if ($fn eq "index.meta") {
143: harvestFile($fn, $directory);
144: }
145: } elsif (-d _) {
146: #logger(" is dir");
147: # recurse into directory
148: $cnt += readAllFiles($f, $docf);
149: }
150: }
151: return $cnt;
152: }
153:
154: #
155: # cleanUnmarkedFiles($basepath)
156: #
157: # deletes all unflagged file and meta entries.
158: #
159: sub cleanUnmarkedFiles {
160: my ($basepath) = @_;
161: my $rv = $dbFindFileFlagPath->execute("${basepath}%");
162: my $ids = $dbFindFileFlagPath->fetchall_arrayref;
163: for my $i (@$ids) {
164: my $id = $$i[0];
165: logger('DEBUG', "cleaning file and meta of id: $id");
166: $dbClearMeta->execute($id);
167: $dbClearFile->execute($id);
168: $dbh->commit;
169: }
170: }
171:
172: #
173: # harvestFile($filename, $filepath)
174: #
175: # reads the index file $filename at $filepath and puts the contents
176: # in the database.
177: #
178: sub harvestFile {
179: my ($filename, $filepath) = @_;
180: logger('DEBUG', "looking at file '$filename' at '$filepath'");
181: # get file time
182: my ($dev,$ino,$mode,$nlink,$uid,$gid,$rdev,$size,
183: $atime,$mtime,$ctime,$blksize,$blocks)
184: = stat("$filepath/$filename");
185: my $filetime = stime($mtime);
186: # register file in db
187: my $fid = registerFile("$filepath/$filename", $filetime);
188: if ($fid) {
189: # file is new/modified
190: # parse index file
191: my $ret = eval{$metaParser->parse_uri("$filepath/$filename")};
192: if ($@) {
193: my $errmsg = $@;
194: logger('ERROR', "error reading XML file '$filepath/$filename' ($errmsg)");
195: $errcnt++;
196: return;
197: }
198: my @data = $metaParserHandler->getData();
199: logger('DEBUG', "parsed $#data+1 elements");
200: if ($data[0][0] eq "html") {
201: # oops, wrong
202: logger('WARNING', "invalid HTML content in file $filepath/$filename");
203: return;
204: }
205: registerMeta($fid, @data);
206: }
207: $idxcnt++;
208: logger('INFO', "$idxcnt index files of $fcnt") if ($idxcnt % 10 == 0) ;
209: }
210:
211: #
212: # readURLIndex($baseurl)
213: #
214: # reads the XML index at $baseurl
215: # and processes all its entries
216: #
217: sub readURLIndex {
218: my ($baseurl) = @_;
219: my $cnt = 0;
220:
221: # parse index file
222: logger('DEBUG', "parsing $baseurl ...");
223: $metaParser->parse_uri($baseurl);
224: my @indexdata = $metaParserHandler->getData();
225: logger('INFO', "parsed $#indexdata+1 index entries");
226:
227: foreach my $me (@indexdata) {
228: $cnt++;
229: my ($tag, $val, $attr) = @$me;
230: my $meta = "";
231: my $file = "";
232: my $mtime = "";
233: if ($tag =~ /index\/resource$/) {
234: if ($attr =~ /metaLink=\"([^\"]+)\"/) {
235: $meta = $1;
236: }
237: if ($attr =~ /resourceLink=\"([^\"]+)\"/) {
238: $file = $1;
239: }
240: if ($attr =~ /modificationDate=\"([^\"]+)\"/) {
241: $mtime = $1;
242: }
243: if ($meta =~ /^http:/) {
244: harvestURL($meta, $file, $mtime);
245: }
246: }
247: }
248: return $cnt;
249: }
250:
251: #
252: # harvestURL($metaurl, $fileurl)
253: #
254: # reads the index file from $metaurl and puts the contents
255: # in the database (under $filepath)
256: #
257: sub harvestURL {
258: my ($metaurl, $fileurl, $filetime) = @_;
259: logger('DEBUG', "fetching from url '$metaurl' for '$fileurl'");
260: # if no filetime then now
261: $filetime = stime(time) unless ($filetime);
262: # register file in db
263: my $fid = registerFile("$fileurl", $filetime);
264: if ($fid) {
265: # try to parse index file
266: my $ret = eval{$metaParser->parse_uri($metaurl)};
267: if ($@) {
268: my $errmsg = $@;
269: logger('ERROR', "error reading XML from '$metaurl' ($errmsg)");
270: $errcnt++;
271: return;
272: }
273: my @data = $metaParserHandler->getData();
274: logger('DEBUG', "parsed $#data+1 elements");
275: if (lc $data[0][0] eq "html") {
276: # oops, wrong
277: logger('WARNING', "invalid HTML content from $metaurl");
278: $warncnt++;
279: return;
280: }
281: # file is new/modified
282: registerMeta($fid, @data);
283: }
284: $idxcnt++;
285: logger('INFO', "$idxcnt index files of $fcnt") if ($idxcnt % 10 == 0) ;
286: }
287:
288:
289: #
290: # $fileid = registerFile($filepath, $filetime)
291: #
292: # returns the file ID for the file $filepath. If necessary it
293: # will be added to the database. returns 0 if an update is not necessary.
294: #
295: sub registerFile {
296: my ($filepath, $filetime) = @_;
297: my $fileid = 0;
298: # look if file is in db
299: my $rv = $dbFindFileName->execute($filepath);
300: my $mtime;
301: ($fileid, $mtime) = $dbFindFileName->fetchrow_array;
302: if ($fileid) {
303: # file is in db
304: # update flag
305: $dbSetFileFlag->execute($fileid, 1);
306: $dbh->commit;
307: my $stime = s2stime($mtime);
308: if ($stime ge $filetime) {
309: # if its current return 0
310: logger('DEBUG', "file: $fileid is old! time: '$stime' (vs '$filetime')");
311: return 0;
312: } else {
313: logger('DEBUG', "file: $fileid is new! time: '$stime' (vs '$filetime')");
314: }
315: }
316: if (! $fileid) {
317: # get a new file id
318: my $rv = $dbNextFileId->execute;
319: ($fileid) = $dbNextFileId->fetchrow_array;
320: logger('DEBUG', "DB newfile: id=$fileid filename=$filepath mtime=$filetime");
321: $dbNewFile->execute($fileid, $filepath, $filetime);
322: # update flag
323: $dbSetFileFlag->execute($fileid, 1);
324: $dbh->commit;
325: }
326: return $fileid;
327: }
328:
329: #
330: # registerMeta($fileid, @meta)
331: #
332: # adds the metadata information @meta for $fileid to the database.
333: #
334: sub registerMeta {
335: my ($fileid, @meta) = @_;
336: logger('DEBUG', "DB newmeta: fileid=$fileid ($#meta)");
337: # clear out old data
338: $dbClearMeta->execute($fileid);
339: my $idx = 0;
340: foreach my $keyval (@meta) {
341: #logger('DEBUG', " DB meta: $$keyval[0]=$$keyval[1]");
342: $dbNewMeta->execute($fileid, $idx++, $$keyval[0], $$keyval[2], $$keyval[1]);
343: }
344: $dbh->commit;
345: logger('INFO', "added $idx elements (file $fileid)");
346: }
347:
348: #
349: # initdb()
350: #
351: # initialises the database connection.
352: #
353: sub initDB {
354: my $rv;
355: # clean tables
356: if ($purgeDB) {
357: $rv = $dbh->do("delete from files");
358: $rv = $dbh->do("delete from meta");
359: if ($dbh->err) {
360: logger('ABORT', "unable to clean table!");
361: exit 1;
362: }
363: $dbh->commit;
364: }
365:
366: # clear flags
367: $rv = $dbh->do("create temporary table file_flags ( fileid integer primary key, flag integer )");
368: $dbh->commit;
369:
370: # prepare statements
371: $dbNextFileId = $dbh->prepare("select nextval('files_id_seq')");
372: $dbNewFile = $dbh->prepare("insert into files (id, filename, mtime) values (?,?,?)");
373: $dbFindFileName = $dbh->prepare("select id,mtime from files where filename=?");
374: $dbFindFilePath = $dbh->prepare("select id,filename,flag from files where filename like ?");
375: $dbClearFile = $dbh->prepare("delete from files where id=?");
376: $dbFindFileFlag = $dbh->prepare("select fileid from file_flags where flag=?");
377: $dbFindFileFlagPath = $dbh->prepare("select id from files left outer join file_flags on files.id=file_flags.fileid where filename like ? and flag is null");
378: $dbSetFileFlag = $dbh->prepare("insert into file_flags (fileid, flag) values (?,?)");
379: $dbNewMeta = $dbh->prepare("insert into meta (fileid, idx, tags, attributes, content) values (?,?,?,?,?)");
380: $dbClearMeta = $dbh->prepare("delete from meta where fileid=?");
381:
382: }
383:
384: #######################################################
385: # main
386: #
387:
388: logger("INFO", "harvestmeta $version");
389:
390: initDB();
391: my $fnum = 0;
392:
393: if ($basedir) {
394: # read and process all files under $basedir
395: $fnum = readAllFiles($basedir, "");
396: # delete orphaned data (under $basedir)
397: cleanUnmarkedFiles($basedir);
398: } elsif ($indexurl) {
399: # read and process XML index
400: $fnum = readURLIndex($indexurl);
401: if ($baseurl) {
402: # delete orphaned data (under $baseurl)
403: cleanUnmarkedFiles($baseurl);
404: }
405: } elsif ($singleurl) {
406: # read and process single XML url
407: harvestURL($singleurl, $singleurl);
408: $fnum = 1;
409: if ($baseurl) {
410: # delete orphaned data (under $baseurl)
411: cleanUnmarkedFiles($baseurl);
412: }
413: }
414:
415: logger("INFO", "analysed $idxcnt of $fnum files!");
416: logger("INFO", "$warncnt warnings");
417: logger("INFO", "$errcnt errors");
418: if ($errcnt > 0) {
419: logger("ABORT", "there were errors!");
420: exit 1;
421: } else {
422: logger("DONE", "all index files read successfully!");
423: }
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