Add FileIter to iwla, allowing to specify multiple files to analyse

iwla.py

@@ -720,6 +720,38 @@ class IWLA(object):
         else:
             self.logger.info('==> Analyse not started : nothing new')
 
+
+class FileIter(object):
+    def __init__(self, filenames):
+        self.filenames = [f for f in filenames.split(',') if f]
+        for f in self.filenames:
+            if not os.path.exists(f):
+                print 'No such file \'%s\'' % (f)
+                sys.exit(-1)
+        self.cur_file = None
+        self._openNextFile()
+
+    def __iter__(self):
+        return self
+
+    def __next__(self):
+        return self.next()
+
+    def _openNextFile(self):
+        if self.cur_file:
+            self.cur_file.close()
+            self.cur_file = None
+        if not self.filenames:
+            raise StopIteration()
+        self.cur_file = open(self.filenames.pop(0))
+
+    def next(self):
+        l = self.cur_file.readline()
+        if not l:
+            self._openNextFile()
+            l = self.cur_file.readline()
+        return l[:-1]
+    
 if __name__ == '__main__':
     parser = argparse.ArgumentParser(description='Intelligent Web Log Analyzer')
 
@@ -775,8 +807,4 @@ if __name__ == '__main__':
         iwla.start(sys.stdin)
     else:
         filename = args.file or conf.analyzed_filename
-        if not os.path.exists(filename):
-            print 'No such file \'%s\'' % (filename)
-            sys.exit(-1)
-        with open(filename) as f:
-            iwla.start(f)
+        iwla.start(FileIter(filename))