Add asynchronous filereader, fix python3 lockups

fdroidserver/asynchronousfilereader/__init__.py

@@ -0,0 +1,64 @@
+"""
+AsynchronousFileReader
+======================
+
+Simple thread based asynchronous file reader for Python.
+
+see https://github.com/soxofaan/asynchronousfilereader
+
+MIT License
+Copyright (c) 2014 Stefaan Lippens
+"""
+
+__version__ = '0.2.1'
+
+import threading
+try:
+    # Python 2
+    from Queue import Queue
+except ImportError:
+    # Python 3
+    from queue import Queue
+
+
+class AsynchronousFileReader(threading.Thread):
+    """
+    Helper class to implement asynchronous reading of a file
+    in a separate thread. Pushes read lines on a queue to
+    be consumed in another thread.
+    """
+
+    def __init__(self, fd, queue=None, autostart=True):
+        self._fd = fd
+        if queue is None:
+            queue = Queue()
+        self.queue = queue
+
+        threading.Thread.__init__(self)
+
+        if autostart:
+            self.start()
+
+    def run(self):
+        """
+        The body of the tread: read lines and put them on the queue.
+        """
+        while True:
+            line = self._fd.readline()
+            if not line:
+                break
+            self.queue.put(line)
+
+    def eof(self):
+        """
+        Check whether there is no more content to expect.
+        """
+        return not self.is_alive() and self.queue.empty()
+
+    def readlines(self):
+        """
+        Get currently available lines.
+        """
+        while not self.queue.empty():
+            yield self.queue.get()
+