305 lines
8.6 KiB
C++
305 lines
8.6 KiB
C++
#ifndef lint
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static char rcsid[] = "@(#$Id: indexer.cpp,v 1.21 2006-01-09 16:53:31 dockes Exp $ (C) 2004 J.F.Dockes";
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#endif
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#include <stdio.h>
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#include <sys/stat.h>
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#include <unistd.h>
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#include <errno.h>
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#include <strings.h>
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#include <iostream>
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#include <list>
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#include <map>
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#include <algorithm>
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#include "pathut.h"
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#include "conftree.h"
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#include "rclconfig.h"
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#include "fstreewalk.h"
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#include "rcldb.h"
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#include "readfile.h"
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#include "indexer.h"
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#include "csguess.h"
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#include "transcode.h"
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#include "debuglog.h"
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#include "internfile.h"
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#include "smallut.h"
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#include "wipedir.h"
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#ifndef NO_NAMESPACES
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using namespace std;
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#endif /* NO_NAMESPACES */
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#ifndef deleteZ
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#define deleteZ(X) {delete X;X = 0;}
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#endif
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DbIndexer::~DbIndexer() {
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// Maybe clean up temporary directory
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if (tmpdir.length()) {
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wipedir(tmpdir);
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if (rmdir(tmpdir.c_str()) < 0) {
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LOGERR(("DbIndexer::~DbIndexer: cannot clear temp dir %s\n",
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tmpdir.c_str()));
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}
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}
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db.close();
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}
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bool DbIndexer::indexDb(bool resetbefore, list<string> *topdirs)
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{
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if (!init(resetbefore))
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return false;
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for (list<string>::const_iterator it = topdirs->begin();
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it != topdirs->end(); it++) {
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LOGDEB(("DbIndexer::index: Indexing %s into %s\n", it->c_str(),
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dbdir.c_str()));
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// Set the current directory in config so that subsequent
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// getConfParams() will get local values
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config->setKeyDir(*it);
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// Set up skipped patterns for this subtree. This probably should be
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// done in the directory change code in processone() instead.
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{
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walker.clearSkippedNames();
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string skipped;
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if (config->getConfParam("skippedNames", skipped)) {
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list<string> skpl;
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stringToStrings(skipped, skpl);
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list<string>::const_iterator it;
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for (it = skpl.begin(); it != skpl.end(); it++) {
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walker.addSkippedName(*it);
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}
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}
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}
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// Walk the directory tree
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if (walker.walk(*it, *this) != FsTreeWalker::FtwOk) {
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LOGERR(("DbIndexer::index: error while indexing %s\n",
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it->c_str()));
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return false;
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}
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}
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// Get rid of all database entries that don't exist in the
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// filesystem anymore.
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db.purge();
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// Create stemming databases. We also remove those which are not
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// configured.
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string slangs;
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if (config->getConfParam("indexstemminglanguages", slangs)) {
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list<string> langs;
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stringToStrings(slangs, langs);
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// Get the list of existing stem dbs from the database (some may have
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// been manually created, we just keep those from the config
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list<string> dblangs = db.getStemLangs();
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list<string>::const_iterator it;
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for (it = dblangs.begin(); it != dblangs.end(); it++) {
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if (find(langs.begin(), langs.end(), *it) == langs.end())
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db.deleteStemDb(*it);
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}
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for (it = langs.begin(); it != langs.end(); it++) {
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db.createStemDb(*it);
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}
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}
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// The close would be done in our destructor, but we want status here
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if (!db.close()) {
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LOGERR(("DbIndexer::index: error closing database in %s\n",
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dbdir.c_str()));
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return false;
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}
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return true;
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}
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bool DbIndexer::init(bool resetbefore)
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{
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if (!maketmpdir(tmpdir)) {
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LOGERR(("DbIndexer: cannot create temporary directory\n"));
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return false;
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}
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if (!db.open(dbdir, resetbefore ? Rcl::Db::DbTrunc : Rcl::Db::DbUpd)) {
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LOGERR(("DbIndexer: error opening database in %s\n", dbdir.c_str()));
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return false;
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}
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return true;
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}
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bool DbIndexer::createStemDb(const string &lang)
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{
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if (!init())
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return false;
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return db.createStemDb(lang);
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}
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/**
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Index individual files, out of a full tree run. No database purging
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*/
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bool DbIndexer::indexFiles(const list<string> &filenames)
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{
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if (!init())
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return false;
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list<string>::const_iterator it;
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for (it = filenames.begin(); it != filenames.end();it++) {
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config->setKeyDir(path_getfather(*it));
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struct stat stb;
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if (stat(it->c_str(), &stb) != 0) {
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LOGERR(("DbIndexer::indexFiles: stat(%s): %s", it->c_str(),
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strerror(errno)));
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continue;
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}
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if (!S_ISREG(stb.st_mode)) {
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LOGERR(("DbIndexer::indexFiles: %s: not a regular file\n",
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it->c_str()));
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continue;
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}
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if (processone(*it, &stb, FsTreeWalker::FtwRegular) !=
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FsTreeWalker::FtwOk) {
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LOGERR(("DbIndexer::indexFiles: Database error\n"));
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return false;
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}
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}
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// The close would be done in our destructor, but we want status here
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if (!db.close()) {
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LOGERR(("DbIndexer::indexfiles: error closing database in %s\n",
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dbdir.c_str()));
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return false;
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}
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return true;
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}
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/// This method gets called for every file and directory found by the
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/// tree walker.
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///
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/// It checks with the db if the file has changed and needs to be
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/// reindexed. If so, it calls internfile() which will identify the
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/// file type and call an appropriate handler to convert the document into
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/// internal format, which we then add to the database.
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///
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/// Accent and majuscule handling are performed by the db module when doing
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/// the actual indexing work. The Rcl::Doc created by internfile()
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/// contains pretty raw utf8 data.
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FsTreeWalker::Status
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DbIndexer::processone(const std::string &fn, const struct stat *stp,
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FsTreeWalker::CbFlag flg)
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{
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// If we're changing directories, possibly adjust parameters (set
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// the current directory in configuration object)
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if (flg == FsTreeWalker::FtwDirEnter ||
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flg == FsTreeWalker::FtwDirReturn) {
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config->setKeyDir(fn);
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return FsTreeWalker::FtwOk;
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}
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// Check db up to date ? Doing this before file type
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// identification means that, if usesystemfilecommand is switched
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// from on to off it may happen that some files which are now
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// without mime type will not be purged from the db, resulting
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// into possible 'cannot intern file' messages at query time...
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if (!db.needUpdate(fn, stp)) {
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LOGDEB(("indexfile: up to date: %s\n", fn.c_str()));
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return FsTreeWalker::FtwOk;
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}
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FileInterner interner(fn, config, tmpdir);
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FileInterner::Status fis = FileInterner::FIAgain;
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while (fis == FileInterner::FIAgain) {
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Rcl::Doc doc;
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string ipath;
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fis = interner.internfile(doc, ipath);
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if (fis == FileInterner::FIError)
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break;
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// Set the date if this was not done in the document handler
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if (doc.fmtime.empty()) {
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char ascdate[20];
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sprintf(ascdate, "%ld", long(stp->st_ctime));
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doc.fmtime = ascdate;
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}
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// Internal access path for multi-document files
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doc.ipath = ipath;
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// Do database-specific work to update document data
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if (!db.add(fn, doc))
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return FsTreeWalker::FtwError;
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}
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return FsTreeWalker::FtwOk;
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}
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////////////////////////////////////////////////////////////////////////////
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// ConIndexer methods: ConfIndexer is the top-level object, that can index
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// multiple directories to multiple databases.
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ConfIndexer::~ConfIndexer()
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{
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deleteZ(dbindexer);
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}
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bool ConfIndexer::index(bool resetbefore)
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{
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// Retrieve the list of directories to be indexed.
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string topdirs;
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if (!config->getConfParam("topdirs", topdirs)) {
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LOGERR(("ConfIndexer::index: no top directories in configuration\n"));
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return false;
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}
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list<string> tdl; // List of directories to be indexed
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if (!stringToStrings(topdirs, tdl)) {
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LOGERR(("ConfIndexer::index: parse error for directory list\n"));
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return false;
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}
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// Each top level directory to be indexed can be associated with a
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// different database. We first group the directories by database:
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// it is important that all directories for a database be indexed
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// at once so that deleted file cleanup works
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list<string>::iterator dirit;
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map<string, list<string> > dbmap;
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map<string, list<string> >::iterator dbit;
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for (dirit = tdl.begin(); dirit != tdl.end(); dirit++) {
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string dbdir;
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string doctopdir = path_tildexpand(*dirit);
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config->setKeyDir(doctopdir);
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if (!config->getConfParam("dbdir", dbdir)) {
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LOGERR(("ConfIndexer::index: no database directory in "
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"configuration for %s\n", doctopdir.c_str()));
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return false;
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}
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dbdir = path_tildexpand(dbdir);
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dbit = dbmap.find(dbdir);
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if (dbit == dbmap.end()) {
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list<string> l;
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l.push_back(doctopdir);
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dbmap[dbdir] = l;
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} else {
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dbit->second.push_back(doctopdir);
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}
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}
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config->setKeyDir("");
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// The dbmap now has dbdir as key and directory lists as values.
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// Index each directory group in turn
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for (dbit = dbmap.begin(); dbit != dbmap.end(); dbit++) {
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//cout << dbit->first << " -> ";
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//list<string>::const_iterator dit;
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//for (dit = dbit->second.begin(); dit != dbit->second.end(); dit++) {
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// cout << *dit << " ";
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//}
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//cout << endl;
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dbindexer = new DbIndexer(config, dbit->first);
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if (!dbindexer->indexDb(resetbefore, &dbit->second)) {
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deleteZ(dbindexer);
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return false;
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}
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deleteZ(dbindexer);
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}
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return true;
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}
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