Add project files.

env/Lib/site-packages/gunicorn/http/unreader.py

@@ -0,0 +1,78 @@
+#
+# This file is part of gunicorn released under the MIT license.
+# See the NOTICE for more information.
+
+import io
+import os
+
+# Classes that can undo reading data from
+# a given type of data source.
+
+
+class Unreader:
+    def __init__(self):
+        self.buf = io.BytesIO()
+
+    def chunk(self):
+        raise NotImplementedError()
+
+    def read(self, size=None):
+        if size is not None and not isinstance(size, int):
+            raise TypeError("size parameter must be an int or long.")
+
+        if size is not None:
+            if size == 0:
+                return b""
+            if size < 0:
+                size = None
+
+        self.buf.seek(0, os.SEEK_END)
+
+        if size is None and self.buf.tell():
+            ret = self.buf.getvalue()
+            self.buf = io.BytesIO()
+            return ret
+        if size is None:
+            d = self.chunk()
+            return d
+
+        while self.buf.tell() < size:
+            chunk = self.chunk()
+            if not chunk:
+                ret = self.buf.getvalue()
+                self.buf = io.BytesIO()
+                return ret
+            self.buf.write(chunk)
+        data = self.buf.getvalue()
+        self.buf = io.BytesIO()
+        self.buf.write(data[size:])
+        return data[:size]
+
+    def unread(self, data):
+        self.buf.seek(0, os.SEEK_END)
+        self.buf.write(data)
+
+
+class SocketUnreader(Unreader):
+    def __init__(self, sock, max_chunk=8192):
+        super().__init__()
+        self.sock = sock
+        self.mxchunk = max_chunk
+
+    def chunk(self):
+        return self.sock.recv(self.mxchunk)
+
+
+class IterUnreader(Unreader):
+    def __init__(self, iterable):
+        super().__init__()
+        self.iter = iter(iterable)
+
+    def chunk(self):
+        if not self.iter:
+            return b""
+        try:
+            return next(self.iter)
+        except StopIteration:
+            self.iter = None
+            return b""