/* Returns false if content can't/needn't be indexed.
* If AlreadyFiltered, then we don't return a filter but return true.
*/
static public bool FilterIndexable(Indexable indexable, TextCache text_cache, out Filter filter)
{
filter = null;
ICollection filters = null;
if (indexable.Filtering == IndexableFiltering.AlreadyFiltered)
{
return(true);
}
if (!ShouldWeFilterThis(indexable))
{
return(false);
}
string path = null;
// First, figure out which filter we should use to deal with
// the indexable.
// If a specific mime type is specified, try to index as that type.
if (indexable.MimeType != null)
{
filters = CreateFiltersFromMimeType(indexable.MimeType);
}
if (indexable.ContentUri.IsFile)
{
path = indexable.ContentUri.LocalPath;
// Otherwise, set the mime type for a directory,
// or sniff it from the file.
if (indexable.MimeType == null)
{
if (Directory.Exists(path))
{
indexable.MimeType = "inode/directory";
indexable.NoContent = true;
}
else if (File.Exists(path))
{
indexable.MimeType = XdgMime.GetMimeType(path);
}
else
{
Log.Warn("Unable to filter {0}. {1} not found.", indexable.DisplayUri, path);
return(false);
}
}
// Set the timestamp to the last write time, if it isn't
// set by the backend.
if (!indexable.ValidTimestamp && indexable.IsNonTransient)
{
indexable.Timestamp = FileSystem.GetLastWriteTimeUtc(path);
}
// Check the timestamp to make sure the file hasn't
// disappeared from underneath us.
if (!FileSystem.ExistsByDateTime(indexable.Timestamp))
{
Log.Warn("Unable to filter {0}. {1} appears to have disappeared from underneath us", indexable.DisplayUri, path);
return(false);
}
if (filters == null || filters.Count == 0)
{
filters = CreateFiltersFromIndexable(indexable);
}
}
// We don't know how to filter this, so there is nothing else to do.
if (filters.Count == 0)
{
if (!indexable.NoContent)
{
Logger.Log.Debug("No filter for {0} ({1}) [{2}]", indexable.DisplayUri, path, indexable.MimeType);
}
return(false);
}
foreach (Filter candidate_filter in filters)
{
if (Debug)
{
Logger.Log.Debug("Testing filter: {0}", candidate_filter);
}
// Hook up the snippet writer.
if (candidate_filter.SnippetMode && text_cache != null)
{
if (candidate_filter.OriginalIsText && indexable.IsNonTransient)
{
text_cache.MarkAsSelfCached(indexable.Uri);
}
else if (indexable.CacheContent)
{
TextWriter writer = text_cache.GetWriter(indexable.Uri);
candidate_filter.AttachSnippetWriter(writer);
}
}
// Set the indexable on the filter.
candidate_filter.Indexable = indexable;
// Open the filter, copy the file's properties to the indexable,
// and hook up the TextReaders.
bool successful_open = false;
TextReader text_reader;
Stream binary_stream;
if (path != null)
{
successful_open = candidate_filter.Open(path);
}
else if ((text_reader = indexable.GetTextReader()) != null)
{
successful_open = candidate_filter.Open(text_reader);
}
else if ((binary_stream = indexable.GetBinaryStream()) != null)
{
successful_open = candidate_filter.Open(binary_stream);
}
if (successful_open)
{
// Set FileType
indexable.AddProperty(Property.NewKeyword("beagrep:FileType", candidate_filter.FileType));
indexable.SetTextReader(candidate_filter.GetTextReader());
indexable.SetHotTextReader(candidate_filter.GetHotTextReader());
if (Debug)
{
Logger.Log.Debug("Successfully filtered {0} with {1}", path, candidate_filter);
}
filter = candidate_filter;
return(true);
}
else
{
Log.Warn("Error in filtering {0} with {1}, falling back", path, candidate_filter);
candidate_filter.Cleanup();
}
}
if (Debug)
{
Logger.Log.Debug("None of the matching filters could process the file: {0}", path);
}
return(false);
}
/* Returns false if content can't/needn't be indexed.
* If AlreadyFiltered, then we don't return a filter but return true.
*/
static public bool FilterIndexable (Indexable indexable, TextCache text_cache, out Filter filter)
{
filter = null;
ICollection filters = null;
if (indexable.Filtering == IndexableFiltering.AlreadyFiltered)
return true;
if (! ShouldWeFilterThis (indexable))
return false;
string path = null;
// First, figure out which filter we should use to deal with
// the indexable.
// If a specific mime type is specified, try to index as that type.
if (indexable.MimeType != null)
filters = CreateFiltersFromMimeType (indexable.MimeType);
if (indexable.ContentUri.IsFile) {
path = indexable.ContentUri.LocalPath;
// Otherwise, set the mime type for a directory,
// or sniff it from the file.
if (indexable.MimeType == null) {
if (Directory.Exists (path)) {
indexable.MimeType = "inode/directory";
indexable.NoContent = true;
} else if (File.Exists (path)) {
indexable.MimeType = XdgMime.GetMimeType (path);
} else {
Log.Warn ("Unable to filter {0}. {1} not found.", indexable.DisplayUri, path);
return false;
}
}
// Set the timestamp to the last write time, if it isn't
// set by the backend.
if (! indexable.ValidTimestamp && indexable.IsNonTransient)
indexable.Timestamp = FileSystem.GetLastWriteTimeUtc (path);
// Check the timestamp to make sure the file hasn't
// disappeared from underneath us.
if (! FileSystem.ExistsByDateTime (indexable.Timestamp)) {
Log.Warn ("Unable to filter {0}. {1} appears to have disappeared from underneath us", indexable.DisplayUri, path);
return false;
}
if (filters == null || filters.Count == 0) {
filters = CreateFiltersFromIndexable (indexable);
}
}
// We don't know how to filter this, so there is nothing else to do.
if (filters.Count == 0) {
if (! indexable.NoContent)
Logger.Log.Debug ("No filter for {0} ({1}) [{2}]", indexable.DisplayUri, path, indexable.MimeType);
return false;
}
foreach (Filter candidate_filter in filters) {
if (Debug)
Logger.Log.Debug ("Testing filter: {0}", candidate_filter);
// Hook up the snippet writer.
if (candidate_filter.SnippetMode && text_cache != null) {
if (candidate_filter.OriginalIsText && indexable.IsNonTransient) {
text_cache.MarkAsSelfCached (indexable.Uri);
} else if (indexable.CacheContent) {
TextWriter writer = text_cache.GetWriter (indexable.Uri);
candidate_filter.AttachSnippetWriter (writer);
}
}
// Set the indexable on the filter.
candidate_filter.Indexable = indexable;
// Open the filter, copy the file's properties to the indexable,
// and hook up the TextReaders.
bool successful_open = false;
TextReader text_reader;
Stream binary_stream;
if (path != null)
successful_open = candidate_filter.Open (path);
else if ((text_reader = indexable.GetTextReader ()) != null)
successful_open = candidate_filter.Open (text_reader);
else if ((binary_stream = indexable.GetBinaryStream ()) != null)
successful_open = candidate_filter.Open (binary_stream);
if (successful_open) {
// Set FileType
indexable.AddProperty (Property.NewKeyword ("beagrep:FileType", candidate_filter.FileType));
indexable.SetTextReader (candidate_filter.GetTextReader ());
indexable.SetHotTextReader (candidate_filter.GetHotTextReader ());
if (Debug)
Logger.Log.Debug ("Successfully filtered {0} with {1}", path, candidate_filter);
filter = candidate_filter;
return true;
} else {
Log.Warn ("Error in filtering {0} with {1}, falling back", path, candidate_filter);
candidate_filter.Cleanup ();
}
}
if (Debug)
Logger.Log.Debug ("None of the matching filters could process the file: {0}", path);
return false;
}