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LibHTTP: Don't copy payload slices in flush_received_buffers()

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Instead of using ByteBuffer::slice() to carve off the remaining part of
the payload every time we flush a part of it, we now keep a sliding
span (ReadonlyBytes) over it.
This commit is contained in:
Andreas Kling 2022-02-11 20:25:15 +01:00
parent ba5bbde7ee
commit 5f5fe103eb
2 changed files with 24 additions and 7 deletions
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12
Userland/Libraries/LibHTTP/Job.cpp
View file

@ -110,7 +110,7 @@ void Job::flush_received_buffers()
return;
dbgln_if(JOB_DEBUG, "Job: Flushing received buffers: have {} bytes in {} buffers for {}", m_buffered_size, m_received_buffers.size(), m_request.url());
for (size_t i = 0; i < m_received_buffers.size(); ++i) {
auto& payload = m_received_buffers[i];
auto& payload = m_received_buffers[i].pending_flush;
auto result = do_write(payload);
if (result.is_error()) {
if (!result.error().is_errno()) {
@ -127,7 +127,7 @@ void Job::flush_received_buffers()
m_buffered_size -= written;
if (written == payload.size()) {
// FIXME: Make this a take-first-friendly object?
m_received_buffers.take_first();
(void)m_received_buffers.take_first();
--i;
continue;
}
@ -506,7 +506,7 @@ void Job::on_socket_connected()
}
}
m_received_buffers.append(payload);
m_received_buffers.append(make<ReceivedBuffer>(payload));
m_buffered_size += payload.size();
m_received_size += payload.size();
flush_received_buffers();
@ -579,8 +579,8 @@ void Job::finish_up()
u8* flat_ptr = flattened_buffer.data();
for (auto& received_buffer : m_received_buffers) {
memcpy(flat_ptr, received_buffer.data(), received_buffer.size());
flat_ptr += received_buffer.size();
memcpy(flat_ptr, received_buffer.pending_flush.data(), received_buffer.pending_flush.size());
flat_ptr += received_buffer.pending_flush.size();
}
m_received_buffers.clear();
@ -595,7 +595,7 @@ void Job::finish_up()
}
m_buffered_size = flattened_buffer.size();
m_received_buffers.append(move(flattened_buffer));
m_received_buffers.append(make<ReceivedBuffer>(move(flattened_buffer)));
m_can_stream_response = true;
}

19
Userland/Libraries/LibHTTP/Job.h
View file

@ -8,6 +8,7 @@
#include <AK/FileStream.h>
#include <AK/HashMap.h>
#include <AK/NonnullOwnPtrVector.h>
#include <AK/Optional.h>
#include <LibCore/NetworkJob.h>
#include <LibHTTP/HttpRequest.h>
@ -54,7 +55,23 @@ protected:
int m_code { -1 };
HashMap<String, String, CaseInsensitiveStringTraits> m_headers;
Vector<String> m_set_cookie_headers;
Vector<ByteBuffer, 2> m_received_buffers;
struct ReceivedBuffer {
ReceivedBuffer(ByteBuffer d)
: data(move(d))
, pending_flush(data.bytes())
{
}
// The entire received buffer.
ByteBuffer data;
// The bytes we have yet to flush. (This is a slice of `data`)
ReadonlyBytes pending_flush;
};
NonnullOwnPtrVector<ReceivedBuffer> m_received_buffers;
size_t m_buffered_size { 0 };
size_t m_received_size { 0 };
Optional<u32> m_content_length;