webrick/httprequest: raise correct exception

"BadRequest" alone does not resolve correctly, it is in the
HTTPStatus namespace.

* lib/webrick/httprequest.rb (read_chunked): use correct exception
* test/webrick/test_httpserver.rb (test_eof_in_chunk): new test

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@62962 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/webrick/httprequest.rb

@@ -511,7 +511,7 @@ module WEBrick
       while chunk_size > 0
         data = read_data(socket, chunk_size) # read chunk-data
         if data.nil? || data.bytesize != chunk_size
-          raise BadRequest, "bad chunk data size."
+          raise HTTPStatus::BadRequest, "bad chunk data size."
         end
         read_line(socket)                    # skip CRLF
         block.call(data)

test/webrick/test_httpserver.rb

@@ -458,4 +458,21 @@ class TestWEBrickHTTPServer < Test::Unit::TestCase
       end
     }
   end
+
+  def test_eof_in_chunk
+    log_tester = lambda do |log, access_log|
+      assert_equal 1, log.size
+      assert log[0].include?('ERROR bad chunk data size')
+    end
+    TestWEBrick.start_httpserver({}, log_tester){|server, addr, port, log|
+      server.mount_proc('/', ->(req, res) { res.body = req.body })
+      TCPSocket.open(addr, port) do |c|
+        c.write("POST / HTTP/1.1\r\nHost: example.com\r\n" \
+                "Transfer-Encoding: chunked\r\n\r\n5\r\na")
+        c.shutdown(Socket::SHUT_WR) # trigger EOF in server
+        res = c.read
+        assert_match %r{\AHTTP/1\.1 400 }, res
+      end
+    }
+  end
 end