WIP - Refactor programmatic downloads

net/tools/testserver/testserver.py

Index: net/tools/testserver/testserver.py
diff --git a/net/tools/testserver/testserver.py b/net/tools/testserver/testserver.py
index e0317e8868524bece9b141f20b74a02c3faae673..e7de47367e34fc57997d2802e17b9ee9c3e28010 100755
--- a/net/tools/testserver/testserver.py
+++ b/net/tools/testserver/testserver.py
@@ -1478,6 +1478,8 @@ class TestPageHandler(testserver_base.BasePageHandler):
     if not self._ShouldHandleRequest('/rangereset'):
       return False
 
+    # HTTP/1.1 is required for ETag and range support.
+    self.protocol_version = 'HTTP/1.1'
     _, _, url_path, _, query, _ = urlparse.urlparse(self.path)
 
     # Defaults
@@ -1558,7 +1560,10 @@ class TestPageHandler(testserver_base.BasePageHandler):
     self.send_header('Content-Type', 'application/octet-stream')
     self.send_header('Content-Length', last_byte - first_byte + 1)
     if send_verifiers:
-      self.send_header('Etag', '"XYZZY"')
+      # If fail_precondition is non-zero, then the ETag for each request will be
+      # different.
+      etag = "%s%d" % (token, fail_precondition)
+      self.send_header('ETag', etag)
       self.send_header('Last-Modified', 'Tue, 19 Feb 2013 14:32 EST')
     self.end_headers()