uaiohttpclient: Add support for redirects.

uaiohttpclient/uaiohttpclient.py

@@ -59,10 +59,14 @@ def request_raw(method, url):
 
 
 def request(method, url):
+    redir_cnt = 0
+    redir_url = None
+    while redir_cnt < 2:
         reader = yield from request_raw(method, url)
         headers = []
         sline = yield from reader.readline()
-    protover, st, msg = sline.split(None, 2)
+        protover, status, msg = sline.split(None, 2)
+        status = int(status)
         chunked = False
         while True:
             line = yield from reader.readline()
@@ -72,11 +76,19 @@ def request(method, url):
             if line.startswith(b"Transfer-Encoding:"):
                 if b"chunked" in line:
                     chunked = True
+            elif line.startswith(b"Location:"):
+                url = line.rstrip().split(None, 1)[1].decode("latin-1")
+
+        if 301 <= status <= 303:
+            redir_cnt += 1
+            yield from reader.close()
+            continue
+        break
 
     if chunked:
         resp = ChunkedClientResponse(reader)
     else:
         resp = ClientResponse(reader)
-    resp.status = int(st)
+    resp.status = status
     resp.headers = headers
     return resp