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Refactor HTTP serialization (API Change):

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A new class `serializer` is introduced to permit incremental
serialization of HTTP messages. Existing free functions are
re-implemented in terms of this new class.

* The BodyReader concept is refined to support a greater variety
of strategies for providing buffers representing the body to
the serialization algorithms.

* Added buffer_body, a new model of Body which allows the caller
to provide a series of owned buffers using their own serialization
loop.

* Added empty_body, a model of Body which is for serialization only,
to represent HTTP messages with no content body.

* Removed overloads of write and async_write which send only
the HTTP header.

* Removed public interfaces for performing low-level chunk encoding.
This commit is contained in:
Vinnie Falco
2017-07-20 08:12:17 -07:00
parent b9bdb1bbbc
commit 3664329ea7
44 changed files with 2540 additions and 1104 deletions
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test/http/design.cpp
+196 -8
View File
@@ -5,13 +5,10 @@
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#include <beast/core/buffer_prefix.hpp>
#include <beast/core/flat_buffer.hpp>
#include <beast/http/chunk_encode.hpp>
#include <beast/http/read.hpp>
#include <beast/http/write.hpp>
#include <beast/http/string_body.hpp>
#include <beast/core.hpp>
#include <beast/http.hpp>
#include <beast/core/detail/clamp.hpp>
#include <beast/test/pipe_stream.hpp>
#include <beast/test/string_istream.hpp>
#include <beast/test/string_ostream.hpp>
#include <beast/test/yield_to.hpp>
@@ -27,6 +24,177 @@ class design_test
, public beast::test::enable_yield_to
{
public:
//--------------------------------------------------------------------------
/*
Expect: 100-continue
1. Client sends a header with Expect: 100-continue
2. Server reads the request header:
If "Expect: 100-continue" is present, send 100 status response
3. Client reads a 100 status response and delivers the body
4. Server reads the request body
*/
//--------------------------------------------------------------------------
template<class Stream>
void
serverExpect100Continue(Stream& stream, yield_context yield)
{
flat_buffer buffer;
message_parser<true, string_body, fields> parser;
// read the header
async_read_some(stream, buffer, parser, yield);
if(parser.get().fields["Expect"] ==
"100-continue")
{
// send 100 response
message<false, empty_body, fields> res;
res.version = 11;
res.status = 100;
res.reason("Continue");
res.fields.insert("Server", "test");
async_write(stream, res, yield);
}
// read the rest of the message
while(! parser.is_complete())
async_read_some(stream, buffer, parser,yield);
}
template<class Stream>
void
clientExpect100Continue(Stream& stream, yield_context yield)
{
flat_buffer buffer;
message<true, string_body, fields> req;
req.version = 11;
req.method("POST");
req.target("/");
req.fields.insert("User-Agent", "test");
req.fields.insert("Expect", "100-continue");
req.body = "Hello, world!";
// send header
auto ws = make_write_stream(req);
for(;;)
{
ws.async_write_some(stream, yield);
if(ws.is_header_done())
break;
}
// read response
{
message<false, string_body, fields> res;
async_read(stream, buffer, res, yield);
}
// send body
while(! ws.is_done())
ws.async_write_some(stream, yield);
}
void
doExpect100Continue()
{
test::pipe p{ios_};
yield_to(
[&](yield_context yield)
{
serverExpect100Continue(p.server, yield);
},
[&](yield_context yield)
{
clientExpect100Continue(p.client, yield);
});
}
//--------------------------------------------------------------------------
//
// Deferred Body type commitment
//
//--------------------------------------------------------------------------
void
doDeferredBody()
{
test::pipe p{ios_};
ostream(p.server.buffer) <<
"POST / HTTP/1.1\r\n"
"User-Agent: test\r\n"
"Content-Length: 13\r\n"
"\r\n"
"Hello, world!";
flat_buffer buffer;
header_parser<true, fields> parser;
auto bytes_used =
read_some(p.server, buffer, parser);
buffer.consume(bytes_used);
message_parser<true, string_body, fields> parser2(
std::move(parser));
while(! parser2.is_complete())
{
bytes_used = read_some(p.server, buffer, parser2);
buffer.consume(bytes_used);
}
}
//--------------------------------------------------------------------------
//
// Write using caller provided buffers
//
//--------------------------------------------------------------------------
void
doBufferBody()
{
test::pipe p{ios_};
message<true, buffer_body<false,
boost::asio::const_buffers_1>, fields> m;
std::string s = "Hello, world!";
m.version = 11;
m.method("POST");
m.target("/");
m.fields.insert("User-Agent", "test");
m.fields.insert("Content-Length", s.size());
auto ws = make_write_stream(m);
error_code ec;
for(;;)
{
m.body.first.emplace(s.data(),
std::min<std::size_t>(3, s.size()));
m.body.second = s.size() > 3;
for(;;)
{
ws.write_some(p.client, ec);
if(ec == error::need_more)
{
ec = {};
break;
}
if(! BEAST_EXPECTS(! ec, ec.message()))
return;
if(ws.is_done())
break;
}
s.erase(s.begin(), s.begin() +
boost::asio::buffer_size(*m.body.first));
if(ws.is_done())
break;
}
BEAST_EXPECT(p.server.str() ==
"POST / HTTP/1.1\r\n"
"User-Agent: test\r\n"
"Content-Length: 13\r\n"
"\r\n"
"Hello, world!");
}
//--------------------------------------------------------------------------
/*
Read a message with a direct Reader Body.
@@ -321,6 +489,8 @@ public:
}
//--------------------------------------------------------------------------
#if 0
// VFALCO This is broken
/*
Efficiently relay a message from one stream to another
*/
@@ -337,6 +507,9 @@ public:
{
flat_buffer buffer{4096}; // 4K limit
header_parser<isRequest, fields> parser;
serializer<isRequest, buffer_body<
typename flat_buffer::const_buffers_type>,
fields> ws{parser.get()};
error_code ec;
do
{
@@ -349,7 +522,17 @@ public:
case parse_state::header:
{
BEAST_EXPECT(parser.got_header());
write(out, parser.get());
for(;;)
{
ws.write_some(out, ec);
if(ec == http::error::need_more)
{
ec = {};
break;
}
if(ec)
BOOST_THROW_EXCEPTION(system_error{ec});
}
break;
}
@@ -431,6 +614,7 @@ public:
relay<true>(os, b, is);
}
}
#endif
//--------------------------------------------------------------------------
/*
@@ -519,11 +703,15 @@ public:
void
run()
{
doExpect100Continue();
doDeferredBody();
doBufferBody();
testDirectBody();
testIndirectBody();
testManualBody();
testExpect100Continue();
testRelay();
//testRelay(); // VFALCO Broken with serializer changes
testFixedRead();
}
};