static http::request_data assemble(http::request_data const& data, buffer_type& header)
{
namespace spirit = boost::spirit;
char const sp[] = " ";
char const ver[] = "HTTP/";
char const crlf[] = "\r\n";
//! собираем start-line
header.insert(header.end(), data.method.begin(), data.method.end());
header.insert(header.end(), sp, sp + sizeof(sp) - 1);
header.insert(header.end(), data.uri.begin(), data.uri.end());
header.insert(header.end(), sp, sp + sizeof(sp) - 1);
header.insert(header.end(), ver, ver + sizeof(ver) - 1);
header.insert(header.end(), data.ver.begin(), data.ver.end());
header.insert(header.end(), crlf, crlf + sizeof(crlf) - 1);
//! собираем message-header в плоский буфер
detail::assemble(data.hdrs, header);
//! разбираем сформированнй буфер и создаем структуру пакета
http::request_data req_data;
http::request req(&req_data);
char const* begin = &header[0];
char const* end = &header[0] + header.size();
spirit::parse_info<> info = spirit::parse(begin, end, req);
return req_data;
}
void instance::write(execution_unit* ctx, buffer_type& buf,
header& hdr, payload_writer* pw) {
CAF_LOG_TRACE(CAF_ARG(hdr));
try {
if (pw) {
auto pos = buf.size();
// write payload first (skip first 72 bytes and write header later)
char placeholder[basp::header_size];
buf.insert(buf.end(), std::begin(placeholder), std::end(placeholder));
binary_serializer bs{ctx, buf};
(*pw)(bs);
auto plen = buf.size() - pos - basp::header_size;
CAF_ASSERT(plen <= std::numeric_limits<uint32_t>::max());
hdr.payload_len = static_cast<uint32_t>(plen);
stream_serializer<charbuf> out{ctx, buf.data() + pos, basp::header_size};
out << hdr;
} else {
binary_serializer bs{ctx, buf};
bs << hdr;
}
}
catch (std::exception& e) {
CAF_LOG_ERROR(CAF_ARG(e.what()));
}
}
/// @pre `n <= buf_.size()`
static chunk_type get_chunk(buffer_type& buf, size_t n) {
CAF_LOG_TRACE(CAF_ARG(buf) << CAF_ARG(n));
chunk_type xs;
if (!buf.empty() && n > 0) {
xs.reserve(std::min(n, buf.size()));
if (n < buf.size()) {
auto first = buf.begin();
auto last = first + static_cast<ptrdiff_t>(n);
std::move(first, last, std::back_inserter(xs));
buf.erase(first, last);
} else {
std::move(buf.begin(), buf.end(), std::back_inserter(xs));
buf.clear();
}
}
return xs;
}
void instance::write(buffer_type& buf,
message_type operation,
uint32_t* payload_len,
uint64_t operation_data,
const node_id& source_node,
const node_id& dest_node,
actor_id source_actor,
actor_id dest_actor,
payload_writer* pw) {
if (! pw) {
binary_serializer bs{std::back_inserter(buf), &get_namespace()};
source_node.serialize(bs);
dest_node.serialize(bs);
bs.write(source_actor)
.write(dest_actor)
.write(uint32_t{0})
.write(static_cast<uint32_t>(operation))
.write(operation_data);
} else {
// reserve space in the buffer to write the payload later on
auto wr_pos = static_cast<ptrdiff_t>(buf.size());
char placeholder[basp::header_size];
buf.insert(buf.end(), std::begin(placeholder), std::end(placeholder));
auto pl_pos = buf.size();
{ // lifetime scope of first serializer (write payload)
binary_serializer bs1{std::back_inserter(buf), &get_namespace()};
(*pw)(bs1);
}
// write broker message to the reserved space
binary_serializer bs2{buf.begin() + wr_pos, &get_namespace()};
auto plen = static_cast<uint32_t>(buf.size() - pl_pos);
source_node.serialize(bs2);
dest_node.serialize(bs2);
bs2.write(source_actor)
.write(dest_actor)
.write(plen)
.write(static_cast<uint32_t>(operation))
.write(operation_data);
if (payload_len)
*payload_len = plen;
}
}
const_iterator end() const
{
return buf_.end();
}
iterator end()
{
return buf_.end();
}
void reset()
{
cur_ = buf_.begin();
end_ = buf_.end();
}
buffer(Elem const* from, size_t length)
: buf_(static_cast<value_type const*>(from), static_cast<value_type const*>(from)+length)
, cur_(buf_.begin())
, end_(buf_.end())
{ }
buffer(InputIterator begin, InputIterator end)
: buf_(begin, end)
, cur_(buf_.begin())
, end_(buf_.end())
{ }
buffer(Source const& source)
: buf_(source.begin(), source.end())
, cur_(buf_.begin())
, end_(buf_.end())
{ }
buffer(buffer&& source)
: buf_(std::move(source.buf_))
, cur_(buf_.begin())
, end_(buf_.end())
{ }
buffer()
: buf_()
, cur_(buf_.begin())
, end_(buf_.end())
{ }
/// fills the buffer using the generator
void fill_buffer(buffer_type& buffer)
{
for (typename buffer_type::iterator it=buffer.begin();it!=buffer.end();++it)
*it=generator_();
}