merge revision(s) 60584,62954-62959,63008:

	webrick: support Proc objects as body responses

	* lib/webrick/httpresponse.rb (send_body): call send_body_proc
	  (send_body_proc): new method
	  (class ChunkedWrapper): new class

	* test/webrick/test_httpresponse.rb (test_send_body_proc): new test
	  (test_send_body_proc_chunked): ditto
	  [Feature #855]

	webrick: favor .write over << method

	This will make the next change to use IO.copy_stream
	easier-to-read.  When we can drop Ruby 2.4 support in a few
	years, this will allow us to use writev(2) with multiple
	arguments for headers and chunked responses.

	* lib/webrick/cgi.rb (write): new wrapper method
	  lib/webrick/httpresponse.rb: (send_header): use socket.write
	  (send_body_io): ditto
	  (send_body_string): ditto
	  (send_body_proc): ditto
	  (_write_data): ditto
	  (ChunkedWrapper#write): ditto
	  (_send_file): ditto
	------------------------------------------------------------------------
	r62954 | normal | 2018-03-28 17:05:52 +0900 (水, 28 3 2018) | 14 lines

	webrick/httpresponse: IO.copy_stream for regular files

	Remove the redundant _send_file method since its functionality
	is unnecessary with IO.copy_stream.  IO.copy_stream also allows
	the use of sendfile under some OSes to speed up copies to
	non-TLS sockets.

	Testing with "curl >/dev/null" and "ruby -run -e httpd" to
	read a 1G file over Linux loopback reveals a reduction from
	around ~0.770 to ~0.490 seconds on the client side.

	* lib/webrick/httpresponse.rb (send_body_io): use IO.copy_stream
	  (_send_file): remove
	  [Feature #14237]
	------------------------------------------------------------------------
	r62955 | normal | 2018-03-28 17:05:57 +0900 (水, 28 3 2018) | 10 lines

	webrick: use IO.copy_stream for single range response

	This is also compatible with range responses generated
	by Rack::File (tested with rack 2.0.3).

	* lib/webrick/httpresponse.rb (send_body_io): use Content-Range
	* lib/webrick/httpservlet/filehandler.rb (make_partial_content):
	  use File object for the single range case
	* test/webrick/test_filehandler.rb (get_res_body): use send_body
	  to test result
	------------------------------------------------------------------------
	r62956 | normal | 2018-03-28 17:06:02 +0900 (水, 28 3 2018) | 7 lines

	test/webrick/test_filehandler.rb: stricter multipart range test

	We need to ensure we generate compatibile output in
	the face of future changes

	* test/webrick/test_filehandler.rb (test_make_partial_content):
	  check response body
	------------------------------------------------------------------------
	r62957 | normal | 2018-03-28 17:06:08 +0900 (水, 28 3 2018) | 8 lines

	webrick: quiet warning for multi-part ranges

	Content-Length is ignored by WEBrick::HTTPResponse even if we
	calculate it, so instead we chunk responses to HTTP/1.1 clients
	and terminate HTTP/1.0 connections.

	* lib/webrick/httpservlet/filehandler.rb (make_partial_content):
	  quiet warning
	------------------------------------------------------------------------
	r62958 | normal | 2018-03-28 17:06:13 +0900 (水, 28 3 2018) | 7 lines

	webrick/httpresponse: make ChunkedWrapper copy_stream-compatible

	The .write method needs to return the number of bytes written
	to avoid confusing IO.copy_stream.

	* lib/webrick/httpresponse.rb (ChunkedWrapper#write): return bytes written
	  (ChunkedWrapper#<<): return self
	------------------------------------------------------------------------
	r62959 | normal | 2018-03-28 17:06:18 +0900 (水, 28 3 2018) | 9 lines

	webrick: use IO.copy_stream for multipart response

	Use the new Proc response body feature to generate a multipart
	range response dynamically.  We use a flat array to minimize
	object overhead as much as possible; as many ranges may fit
	into an HTTP request header.

	* lib/webrick/httpservlet/filehandler.rb (multipart_body): new method
	  (make_partial_content): use multipart_body

	get rid of test error/failure on Windows introduced at r62955

	* lib/webrick/httpresponse.rb (send_body_io): use seek if NotImplementedError
	  is raised in IO.copy_stream with offset.

	* lib/webrick/httpservlet/filehandler.rb (multipart_body): ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@63014 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

6 files changed, 244 insertions, 53 deletions

diff --git a/ChangeLog b/ChangeLog
index b63477df3a..1d86dd5fed 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,101 @@
+Wed Mar 28 23:08:46 2018  NAKAMURA Usaku  <usa@ruby-lang.org>
+
+	get rid of test error/failure on Windows introduced at r62955
+
+	* lib/webrick/httpresponse.rb (send_body_io): use seek if
+	  NotImplementedError is raised in IO.copy_stream with offset.
+
+	* lib/webrick/httpservlet/filehandler.rb (multipart_body): ditto.
+
+Wed Mar 28 23:08:46 2018  Eric Wong  <normalperson@yhbt.net>
+
+	webrick: support Proc objects as body responses
+
+	* lib/webrick/httpresponse.rb (send_body): call send_body_proc
+	  (send_body_proc): new method
+	  (class ChunkedWrapper): new class
+
+	* test/webrick/test_httpresponse.rb (test_send_body_proc): new test
+	  (test_send_body_proc_chunked): ditto
+	  [Feature #855]
+
+	webrick: favor .write over << method
+
+	This will make the next change to use IO.copy_stream
+	easier-to-read.  When we can drop Ruby 2.4 support in a few
+	years, this will allow us to use writev(2) with multiple
+	arguments for headers and chunked responses.
+
+	* lib/webrick/cgi.rb (write): new wrapper method
+	  lib/webrick/httpresponse.rb: (send_header): use socket.write
+	  (send_body_io): ditto
+	  (send_body_string): ditto
+	  (send_body_proc): ditto
+	  (_write_data): ditto
+	  (ChunkedWrapper#write): ditto
+	  (_send_file): ditto
+
+	webrick/httpresponse: IO.copy_stream for regular files
+
+	Remove the redundant _send_file method since its functionality
+	is unnecessary with IO.copy_stream.  IO.copy_stream also allows
+	the use of sendfile under some OSes to speed up copies to
+	non-TLS sockets.
+
+	Testing with "curl >/dev/null" and "ruby -run -e httpd" to
+	read a 1G file over Linux loopback reveals a reduction from
+	around ~0.770 to ~0.490 seconds on the client side.
+
+	* lib/webrick/httpresponse.rb (send_body_io): use IO.copy_stream
+	  (_send_file): remove
+	  [Feature #14237]
+
+	webrick: use IO.copy_stream for single range response
+
+	This is also compatible with range responses generated
+	by Rack::File (tested with rack 2.0.3).
+
+	* lib/webrick/httpresponse.rb (send_body_io): use Content-Range
+	* lib/webrick/httpservlet/filehandler.rb (make_partial_content):
+	  use File object for the single range case
+	* test/webrick/test_filehandler.rb (get_res_body): use send_body
+	  to test result
+
+	test/webrick/test_filehandler.rb: stricter multipart range test
+
+	We need to ensure we generate compatibile output in
+	the face of future changes
+
+	* test/webrick/test_filehandler.rb (test_make_partial_content):
+	  check response body
+
+	webrick: quiet warning for multi-part ranges
+
+	Content-Length is ignored by WEBrick::HTTPResponse even if we
+	calculate it, so instead we chunk responses to HTTP/1.1 clients
+	and terminate HTTP/1.0 connections.
+
+	* lib/webrick/httpservlet/filehandler.rb (make_partial_content):
+	  quiet warning
+
+	webrick/httpresponse: make ChunkedWrapper copy_stream-compatible
+
+	The .write method needs to return the number of bytes written
+	to avoid confusing IO.copy_stream.
+
+	* lib/webrick/httpresponse.rb (ChunkedWrapper#write): return bytes written
+	  (ChunkedWrapper#<<): return self
+
+	webrick: use IO.copy_stream for multipart response
+
+	Use the new Proc response body feature to generate a multipart
+	range response dynamically.  We use a flat array to minimize
+	object overhead as much as possible; as many ranges may fit
+	into an HTTP request header.
+
+	* lib/webrick/httpservlet/filehandler.rb (multipart_body): new method
+	  (make_partial_content): use multipart_body
+
 Wed Mar 28 21:24:24 2018  Nobuyoshi Nakada  <nobu@ruby-lang.org>
 
 	unixsocket.c: abstract namespace
diff --git a/lib/webrick/httpresponse.rb b/lib/webrick/httpresponse.rb
index 34c1018287..c120cae09c 100644
--- a/lib/webrick/httpresponse.rb
+++ b/lib/webrick/httpresponse.rb
@@ -310,6 +310,8 @@ module WEBrick
     def send_body(socket) # :nodoc:
       if @body.respond_to? :readpartial then
         send_body_io(socket)
+      elsif @body.respond_to?(:call) then
+        send_body_proc(socket)
       else
         send_body_string(socket)
       end
@@ -428,9 +430,20 @@ module WEBrick
           end
           _write_data(socket, "0#{CRLF}#{CRLF}")
         else
-          size = @header['content-length'].to_i
-          _send_file(socket, @body, 0, size)
-          @sent_size = size
+          if %r{\Abytes (\d+)-(\d+)/\d+\z} =~ @header['content-range']
+            offset = $1.to_i
+            size = $2.to_i - offset + 1
+          else
+            offset = nil
+            size = @header['content-length']
+            size = size.to_i if size
+          end
+          begin
+            @sent_size = IO.copy_stream(@body, socket, size, offset)
+          rescue NotImplementedError
+            @body.seek(offset, IO::SEEK_SET)
+            @sent_size = IO.copy_stream(@body, socket, size)
+          end
         end
       ensure
         @body.close
@@ -459,24 +472,41 @@ module WEBrick
       end
     end
 
-    def _send_file(output, input, offset, size)
-      while offset > 0
-        sz = @buffer_size < size ? @buffer_size : size
-        buf = input.read(sz)
-        offset -= buf.bytesize
+    def send_body_proc(socket)
+      if @request_method == "HEAD"
+        # do nothing
+      elsif chunked?
+        @body.call(ChunkedWrapper.new(socket, self))
+        _write_data(socket, "0#{CRLF}#{CRLF}")
+      else
+        size = @header['content-length'].to_i
+        @body.call(socket)
+        @sent_size = size
+      end
+    end
+
+    class ChunkedWrapper
+      def initialize(socket, resp)
+        @socket = socket
+        @resp = resp
       end
 
-      if size == 0
-        while buf = input.read(@buffer_size)
-          _write_data(output, buf)
-        end
-      else
-        while size > 0
-          sz = @buffer_size < size ? @buffer_size : size
-          buf = input.read(sz)
-          _write_data(output, buf)
-          size -= buf.bytesize
-        end
+      def write(buf)
+        return 0 if buf.empty?
+        socket = @socket
+        @resp.instance_eval {
+          size = buf.bytesize
+          data = "#{size.to_s(16)}#{CRLF}#{buf}#{CRLF}"
+          _write_data(socket, data)
+          data.clear
+          @sent_size += size
+          size
+        }
+      end
+
+      def <<(*buf)
+        write(buf)
+        self
       end
     end
 
diff --git a/lib/webrick/httpservlet/filehandler.rb b/lib/webrick/httpservlet/filehandler.rb
index 068246c9d0..7aa0d9fb56 100644
--- a/lib/webrick/httpservlet/filehandler.rb
+++ b/lib/webrick/httpservlet/filehandler.rb
@@ -87,6 +87,35 @@ module WEBrick
         return false
       end
 
+      # returns a lambda for webrick/httpresponse.rb send_body_proc
+      def multipart_body(body, parts, boundary, mtype, filesize)
+        lambda do |socket|
+          begin
+            begin
+              first = parts.shift
+              last = parts.shift
+              socket.write(
+                "--#{boundary}#{CRLF}" \
+                "Content-Type: #{mtype}#{CRLF}" \
+                "Content-Range: bytes #{first}-#{last}/#{filesize}#{CRLF}" \
+                "#{CRLF}"
+              )
+
+              begin
+                IO.copy_stream(body, socket, last - first + 1, first)
+              rescue NotImplementedError
+                body.seek(first, IO::SEEK_SET)
+                IO.copy_stream(body, socket, last - first + 1)
+              end
+              socket.write(CRLF)
+            end while parts[0]
+            socket.write("--#{boundary}--#{CRLF}")
+          ensure
+            body.close
+          end
+        end
+      end
+
       def make_partial_content(req, res, filename, filesize)
         mtype = HTTPUtils::mime_type(filename, @config[:MimeTypes])
         unless ranges = HTTPUtils::parse_range_header(req['range'])
@@ -97,37 +126,27 @@ module WEBrick
           if ranges.size > 1
             time = Time.now
             boundary = "#{time.sec}_#{time.usec}_#{Process::pid}"
-            body = ''
-            ranges.each{|range|
-              first, last = prepare_range(range, filesize)
-              next if first < 0
-              io.pos = first
-              content = io.read(last-first+1)
-              body << "--" << boundary << CRLF
-              body << "Content-Type: #{mtype}" << CRLF
-              body << "Content-Range: bytes #{first}-#{last}/#{filesize}" << CRLF
-              body << CRLF
-              body << content
-              body << CRLF
+            parts = []
+            ranges.each {|range|
+              prange = prepare_range(range, filesize)
+              next if prange[0] < 0
+              parts.concat(prange)
             }
-            raise HTTPStatus::RequestRangeNotSatisfiable if body.empty?
-            body << "--" << boundary << "--" << CRLF
+            raise HTTPStatus::RequestRangeNotSatisfiable if parts.empty?
             res["content-type"] = "multipart/byteranges; boundary=#{boundary}"
-            res.body = body
+            if req.http_version < '1.1'
+              res['connection'] = 'close'
+            else
+              res.chunked = true
+            end
+            res.body = multipart_body(io.dup, parts, boundary, mtype, filesize)
           elsif range = ranges[0]
             first, last = prepare_range(range, filesize)
             raise HTTPStatus::RequestRangeNotSatisfiable if first < 0
-            if last == filesize - 1
-              content = io.dup
-              content.pos = first
-            else
-              io.pos = first
-              content = io.read(last-first+1)
-            end
             res['content-type'] = mtype
             res['content-range'] = "bytes #{first}-#{last}/#{filesize}"
             res['content-length'] = last - first + 1
-            res.body = content
+            res.body = io.dup
           else
             raise HTTPStatus::BadRequest
           end
diff --git a/test/webrick/test_filehandler.rb b/test/webrick/test_filehandler.rb
index 663b237a82..5b17e77fd5 100644
--- a/test/webrick/test_filehandler.rb
+++ b/test/webrick/test_filehandler.rb
@@ -15,16 +15,10 @@ class WEBrick::TestFileHandler < Test::Unit::TestCase
   end
 
   def get_res_body(res)
-    body = res.body
-    if defined? body.read
-      begin
-        body.read
-      ensure
-        body.close
-      end
-    else
-      body
-    end
+    sio = StringIO.new
+    sio.binmode
+    res.send_body(sio)
+    sio.string
   end
 
   def make_range_request(range_spec)
@@ -76,6 +70,23 @@ class WEBrick::TestFileHandler < Test::Unit::TestCase
 
     res = make_range_response(filename, "bytes=0-0, -2")
     assert_match(%r{^multipart/byteranges}, res["content-type"])
+    body = get_res_body(res)
+    boundary = /; boundary=(.+)/.match(res['content-type'])[1]
+    off = filesize - 2
+    last = filesize - 1
+
+    exp = "--#{boundary}\r\n" \
+          "Content-Type: text/plain\r\n" \
+          "Content-Range: bytes 0-0/#{filesize}\r\n" \
+          "\r\n" \
+          "#{IO.read(__FILE__, 1)}\r\n" \
+          "--#{boundary}\r\n" \
+          "Content-Type: text/plain\r\n" \
+          "Content-Range: bytes #{off}-#{last}/#{filesize}\r\n" \
+          "\r\n" \
+          "#{IO.read(__FILE__, 2, off)}\r\n" \
+          "--#{boundary}--\r\n"
+    assert_equal exp, body
   end
 
   def test_filehandler
diff --git a/test/webrick/test_httpresponse.rb b/test/webrick/test_httpresponse.rb
index 5c0e5d1753..6263e0a710 100644
--- a/test/webrick/test_httpresponse.rb
+++ b/test/webrick/test_httpresponse.rb
@@ -168,5 +168,38 @@ module WEBrick
       }
       assert_equal 0, logger.messages.length
     end
+
+    def test_send_body_proc
+      @res.body = Proc.new { |out| out.write('hello') }
+      IO.pipe do |r, w|
+        @res.send_body(w)
+        w.close
+        r.binmode
+        assert_equal 'hello', r.read
+      end
+      assert_equal 0, logger.messages.length
+    end
+
+    def test_send_body_proc_chunked
+      @res.body = Proc.new { |out| out.write('hello') }
+      @res.chunked = true
+      IO.pipe do |r, w|
+        @res.send_body(w)
+        w.close
+        r.binmode
+        assert_equal "5\r\nhello\r\n0\r\n\r\n", r.read
+      end
+      assert_equal 0, logger.messages.length
+    end
+
+    def test_set_error
+      status = 400
+      message = 'missing attribute'
+      @res.status = status
+      error = WEBrick::HTTPStatus[status].new(message)
+      body = @res.set_error(error)
+      assert_match(/#{@res.reason_phrase}/, body)
+      assert_match(/#{message}/, body)
+    end
   end
 end
diff --git a/version.h b/version.h
index 7ab4190d1b..a722695455 100644
--- a/version.h
+++ b/version.h
@@ -1,6 +1,6 @@
 #define RUBY_VERSION "2.3.7"
 #define RUBY_RELEASE_DATE "2018-03-28"
-#define RUBY_PATCHLEVEL 455
+#define RUBY_PATCHLEVEL 456
 
 #define RUBY_RELEASE_YEAR 2018
 #define RUBY_RELEASE_MONTH 3