ceph/src/Beast/include/beast/http/chunk_encode.hpp

   1 //
   2 // Copyright (c) 2013-2017 Vinnie Falco (vinnie dot falco at gmail dot com)
   3 //
   4 // Distributed under the Boost Software License, Version 1.0. (See accompanying
   5 // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   6 //
   7
   8 #ifndef BEAST_HTTP_CHUNK_ENCODE_HPP
   9 #define BEAST_HTTP_CHUNK_ENCODE_HPP
  10
  11 #include <beast/config.hpp>
  12 #include <beast/core/buffer_cat.hpp>
  13 #include <beast/http/detail/chunk_encode.hpp>
  14 #include <boost/asio/buffer.hpp>
  15 #include <boost/assert.hpp>
  16 #include <algorithm>
  17 #include <array>
  18 #include <cstddef>
  19 #include <iterator>
  20 #include <type_traits>
  21
  22 namespace beast {
  23 namespace http {
  24
  25 /** Returns a chunk-encoded ConstBufferSequence.
  26
  27     This returns a buffer sequence representing the
  28     first chunk of a chunked transfer coded body.
  29
  30     @param fin `true` if this is the last chunk.
  31
  32     @param buffers The input buffer sequence.
  33
  34     @return A chunk-encoded ConstBufferSequence representing the input.
  35
  36     @see <a href=https://tools.ietf.org/html/rfc7230#section-4.1.3>rfc7230 section 4.1.3</a>
  37 */
  38 template<class ConstBufferSequence>
  39 #if BEAST_DOXYGEN
  40 implementation_defined
  41 #else
  42 beast::detail::buffer_cat_helper<
  43     detail::chunk_encode_delim,
  44     ConstBufferSequence,
  45     boost::asio::const_buffers_1>
  46 #endif
  47 chunk_encode(bool fin, ConstBufferSequence const& buffers)
  48 {
  49     using boost::asio::buffer_size;
  50     return buffer_cat(
  51         detail::chunk_encode_delim{buffer_size(buffers)},
  52         buffers,
  53         fin ? boost::asio::const_buffers_1{"\r\n0\r\n\r\n", 7}
  54             : boost::asio::const_buffers_1{"\r\n", 2});
  55 }
  56
  57 /** Returns a chunked encoding final chunk.
  58
  59     @see <a href=https://tools.ietf.org/html/rfc7230#section-4.1.3>rfc7230 section 4.1.3</a>
  60 */
  61 inline
  62 #if BEAST_DOXYGEN
  63 implementation_defined
  64 #else
  65 boost::asio::const_buffers_1
  66 #endif
  67 chunk_encode_final()
  68 {
  69     return boost::asio::const_buffers_1{"0\r\n\r\n", 5};
  70 }
  71
  72 } // http
  73 } // beast
  74
  75 #endif