Import wpt@ed94c51f3dfaa5ff4c9c311add1a560408059c51

third_party/WebKit/LayoutTests/imported/wpt/common/large.py

+def main(request, response):
+    """Code for generating large responses where the actual response data
+    isn't very important.
+
+    Two request parameters:
+    size (required): An integer number of bytes (no suffix) or kilobytes
+                     ("kb" suffix) or megabytes ("Mb" suffix).
+    string (optional): The string to repeat in the response. Defaults to "a".
+
+    Example:
+        /resources/large.py?size=32Mb&string=ab
+    """
+    if not "size" in request.GET:
+        400, "Need an integer bytes parameter"
+
+    bytes_value = request.GET.first("size")
+
+    chunk_size = 1024
+
+    multipliers = {"kb": 1024,
+                   "Mb": 1024*1024}
+
+    suffix = bytes_value[-2:]
+    if suffix in multipliers:
+        multiplier = multipliers[suffix]
+        bytes_value = bytes_value[:-2] * multiplier
+
+    try:
+        num_bytes = int(bytes_value)
+    except ValueError:
+        return 400, "Bytes must be an integer possibly with a kb or Mb suffix"
+
+    string = str(request.GET.first("string", "a"))
+
+    chunk = string * chunk_size
+
+    def content():
+        bytes_sent = 0
+        while bytes_sent < num_bytes:
+            if num_bytes - bytes_sent < len(chunk):
+                yield chunk[num_bytes - bytes_sent]
+            else:
+                yield chunk
+            bytes_sent += len(chunk)
+    return [("Content-Type", "text/plain")], content()