debug traces: add is_unknown() method to filters to help with pointing out unhandled mime types

src/internfile/Filter.h

@@ -165,7 +165,7 @@ namespace Dijon
 	}
 
 	virtual void clear() {m_metaData.clear();}
-
+	virtual bool is_unknown() {return false;}
     protected:
 	/// The MIME type handled by the filter.
 	std::string m_mimeType;

src/internfile/internfile.cpp

@@ -254,9 +254,8 @@ void FileInterner::init(const string &f, const struct stat *stp, RclConfig *cnf,
     m_mimetype = l_mime;
     Dijon::Filter *df = getMimeHandler(l_mime, m_cfg, !m_forPreview);
 
-    if (!df) {
-	// No handler for this type, for now :( if indexallfilenames
-	// is set in the config, this normally wont happen (we get mh_unknown)
+    if (!df or df->is_unknown()) {
+	// No real handler for this type, for now :( 
 	LOGINFO(("FileInterner:: ignored: [%s] mime [%s]\n", 
                 f.c_str(), l_mime.c_str()));
 	return;

src/internfile/mh_unknown.h

@@ -45,9 +45,7 @@ class MimeHandlerUnknown : public RecollFilter {
 	m_metaData["mimetype"] = "text/plain";
 	return true;
     }
-    virtual void clear() {
-	RecollFilter::clear(); 
-    }
+    virtual bool is_unknown() {return true;}
 };
 
 #endif /* _MH_UNKNOWN_H_INCLUDED_ */

src/internfile/mimehandler.cpp

@@ -71,6 +71,11 @@ static Dijon::Filter *mhFactory(const string &mime)
         // exec) but still opening with a specific editor.
         return new MimeHandlerText(lmime); 
     } else {
+	// We should not get there. It means that "internal" was set
+	// as a handler in mimeconf for a mime type we actually can't
+	// handle.
+	LOGERR(("mhFactory: mime type [%s] set as internal but unknown\n", 
+		lmime.c_str()));
 	return new MimeHandlerUnknown(lmime);
     }
 }
@@ -222,7 +227,6 @@ Dijon::Filter *getMimeHandler(const string &mtype, RclConfig *cfg,
     bool indexunknown = false;
     cfg->getConfParam("indexallfilenames", &indexunknown);
     if (indexunknown) {
-	LOGDEB(("getMimeHandler: returning MimeHandlerUnknown\n"));
 	return new MimeHandlerUnknown("application/octet-stream");
     } else {
 	return 0;