blob: 63448b3e56ef746adafae0eb0596746406bd50cf [file] [log] [blame]
#include <cstdint>
#include <string>
#include <utility>
#include "absl/strings/string_view.h"
#include "common/platform/api/quiche_export.h"
namespace http2 {
namespace adapter {
// Represents a source of DATA frames for transmission to the peer.
class QUICHE_EXPORT_PRIVATE DataFrameSource {
virtual ~DataFrameSource() {}
enum : int64_t { kBlocked = 0, kError = -1 };
// Returns the number of bytes to send in the next DATA frame, and whether
// this frame indicates the end of the data. Returns {kBlocked, false} if
// blocked, {kError, false} on error.
virtual std::pair<int64_t, bool> SelectPayloadLength(size_t max_length) = 0;
// This method is called with a frame header and a payload length to send. The
// source should send or buffer the entire frame and return true, or return
// false without sending or buffering anything.
virtual bool Send(absl::string_view frame_header, size_t payload_length) = 0;
// If true, the end of this data source indicates the end of the stream.
// Otherwise, this data will be followed by trailers.
virtual bool send_fin() const = 0;
// Represents a source of metadata frames for transmission to the peer.
class QUICHE_EXPORT_PRIVATE MetadataSource {
virtual ~MetadataSource() {}
// Returns the number of frames of at most |max_frame_size| required to
// serialize the metadata for this source. Only required by the nghttp2
// implementation.
virtual size_t NumFrames(size_t max_frame_size) const = 0;
// This method is called with a destination buffer and length. It should
// return the number of payload bytes copied to |dest|, or a negative integer
// to indicate an error, as well as a boolean indicating whether the metadata
// has been completely copied.
virtual std::pair<int64_t, bool> Pack(uint8_t* dest, size_t dest_len) = 0;
} // namespace adapter
} // namespace http2