1: #!/usr/local/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_devel';
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 = "0.2 (08.07.2004)";
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 $file;
232: if ($tag =~ /index\/resource$/) {
233: if ($attr =~ /metaLink=\"([^\"]+)\"/) {
234: $meta = $1;
235: }
236: if ($attr =~ /resourceLink=\"([^\"]+)\"/) {
237: $file = $1;
238: }
239: if ($meta =~ /^http:/) {
240: harvestURL($meta, $file);
241: }
242: }
243: }
244: return $cnt;
245: }
246:
247: #
248: # harvestURL($metaurl, $fileurl)
249: #
250: # reads the index file from $metaurl and puts the contents
251: # in the database (under $filepath)
252: #
253: sub harvestURL {
254: my ($metaurl, $fileurl) = @_;
255: logger('DEBUG', "fetching from url '$metaurl' for '$fileurl'");
256: # try to parse index file
257: my $ret = eval{$metaParser->parse_uri($metaurl)};
258: if ($@) {
259: my $errmsg = $@;
260: logger('ERROR', "error reading XML from '$metaurl' ($errmsg)");
261: $errcnt++;
262: return;
263: }
264: my @data = $metaParserHandler->getData();
265: logger('DEBUG', "parsed $#data+1 elements");
266: if ($data[0][0] eq "html") {
267: # oops, wrong
268: logger('WARNING', "invalid HTML content from $metaurl");
269: $warncnt++;
270: return;
271: }
272: # filetime is now
273: my $filetime = stime(time);
274: # register file in db
275: my $fid = registerFile("$fileurl", $filetime);
276: if ($fid) {
277: # file is new/modified
278: registerMeta($fid, @data);
279: }
280: $idxcnt++;
281: logger('INFO', "$idxcnt index files of $fcnt") if ($idxcnt % 10 == 0) ;
282: }
283:
284:
285: #
286: # $fileid = registerFile($filepath, $filetime)
287: #
288: # returns the file ID for the file $filepath. If necessary it
289: # will be added to the database. returns 0 if an update is not necessary.
290: #
291: sub registerFile {
292: my ($filepath, $filetime) = @_;
293: my $fileid = 0;
294: # look if file is in db
295: my $rv = $dbFindFileName->execute($filepath);
296: my $mtime;
297: ($fileid, $mtime) = $dbFindFileName->fetchrow_array;
298: if ($fileid) {
299: # file is in db
300: # update flag
301: $dbSetFileFlag->execute($fileid, 1);
302: $dbh->commit;
303: my $stime = s2stime($mtime);
304: if ($stime ge $filetime) {
305: # if its current return 0
306: logger('DEBUG', "file: $fileid is old! time: '$stime' (vs '$filetime')");
307: return 0;
308: } else {
309: logger('DEBUG', "file: $fileid is new! time: '$stime' (vs '$filetime')");
310: }
311: }
312: if (! $fileid) {
313: # get a new file id
314: my $rv = $dbNextFileId->execute;
315: ($fileid) = $dbNextFileId->fetchrow_array;
316: logger('DEBUG', "DB newfile: id=$fileid filename=$filepath mtime=$filetime");
317: $dbNewFile->execute($fileid, $filepath, $filetime);
318: # update flag
319: $dbSetFileFlag->execute($fileid, 1);
320: $dbh->commit;
321: }
322: return $fileid;
323: }
324:
325: #
326: # registerMeta($fileid, @meta)
327: #
328: # adds the metadata information @meta for $fileid to the database.
329: #
330: sub registerMeta {
331: my ($fileid, @meta) = @_;
332: logger('DEBUG', "DB newmeta: fileid=$fileid ($#meta)");
333: # clear out old data
334: $dbClearMeta->execute($fileid);
335: my $idx = 0;
336: foreach my $keyval (@meta) {
337: #logger('DEBUG', " DB meta: $$keyval[0]=$$keyval[1]");
338: $dbNewMeta->execute($fileid, $idx++, $$keyval[0], $$keyval[2], $$keyval[1]);
339: }
340: $dbh->commit;
341: logger('INFO', "added $idx elements (file $fileid)");
342: }
343:
344: #
345: # initdb()
346: #
347: # initialises the database connection.
348: #
349: sub initDB {
350: my $rv;
351: # clean tables
352: if ($purgeDB) {
353: $rv = $dbh->do("delete from files");
354: $rv = $dbh->do("delete from meta");
355: if ($dbh->err) {
356: logger('ABORT', "unable to clean table!");
357: exit 1;
358: }
359: $dbh->commit;
360: }
361:
362: # clear flags
363: $rv = $dbh->do("create temporary table file_flags ( fileid integer primary key, flag integer )");
364: $dbh->commit;
365:
366: # prepare statements
367: $dbNextFileId = $dbh->prepare("select nextval('files_id_seq')");
368: $dbNewFile = $dbh->prepare("insert into files (id, filename, mtime) values (?,?,?)");
369: $dbFindFileName = $dbh->prepare("select id,mtime from files where filename=?");
370: $dbFindFilePath = $dbh->prepare("select id,filename,flag from files where filename like ?");
371: $dbClearFile = $dbh->prepare("delete from files where id=?");
372: $dbFindFileFlag = $dbh->prepare("select fileid from file_flags where flag=?");
373: $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");
374: $dbSetFileFlag = $dbh->prepare("insert into file_flags (fileid, flag) values (?,?)");
375: $dbNewMeta = $dbh->prepare("insert into meta (fileid, idx, tags, attributes, content) values (?,?,?,?,?)");
376: $dbClearMeta = $dbh->prepare("delete from meta where fileid=?");
377:
378: }
379:
380: #######################################################
381: # main
382: #
383:
384: logger("INFO", "harvestmeta $version");
385:
386: initDB();
387: my $fnum;
388:
389: if ($basedir) {
390: # read and process all files under $basedir
391: $fnum = readAllFiles($basedir, "");
392: # delete orphaned data (under $basedir)
393: cleanUnmarkedFiles($basedir);
394: } elsif ($baseurl) {
395: # read and process XML index
396: $fnum = readURLIndex($indexurl);
397: if ($baseurl) {
398: # delete orphaned data (under $baseurl)
399: cleanUnmarkedFiles($baseurl);
400: }
401: } elsif ($singleurl) {
402: # read and process single XML url
403: harvestURL($singleurl, $singleurl);
404: $fnum = 1;
405: if ($baseurl) {
406: # delete orphaned data (under $baseurl)
407: cleanUnmarkedFiles($baseurl);
408: }
409: }
410:
411: logger("INFO", "analysed $idxcnt of $fnum files!");
412: logger("INFO", "$warncnt warnings");
413: logger("INFO", "$errcnt errors");
414: if ($errcnt > 0) {
415: logger("ABORT", "there were errors!");
416: exit 1;
417: } else {
418: logger("DONE", "all index files read successfully!");
419: }
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