#include <stddef.h>
#include <time.h>
+
+#include <memory>
#include <string>
+#include <unordered_map>
+#include <vector>
#include "tlse.h"
size_t bytes_sent;
size_t bytes_lost;
size_t num_loss_events;
+ std::string hls_zombie_key;
};
struct Client {
Client(int sock);
// Serialization/deserialization.
- Client(const ClientProto &serialized, Stream *stream);
- ClientProto serialize() const;
+ Client(const ClientProto &serialized, const std::vector<std::shared_ptr<const std::string>> &short_responses, Stream *stream);
+ ClientProto serialize(std::unordered_map<const std::string *, size_t> *short_response_pool) const;
ClientStats get_stats() const;
+ std::string get_hls_zombie_key() const {
+ if (x_playback_session_id.empty()) {
+ return remote_addr;
+ } else {
+ return x_playback_session_id;
+ }
+ }
+
// The file descriptor associated with this socket.
int sock;
- // When the client connected, in terms of CLOCK_MONOTONIC_COARSE.
+ // When the client connected (or went into keepalive), in terms of CLOCK_MONOTONIC_COARSE.
timespec connect_time;
// Some information only used for logging.
std::string remote_addr;
std::string referer;
std::string user_agent;
+ std::string x_playback_session_id;
enum State { READING_REQUEST, SENDING_HEADER, SENDING_DATA, SENDING_SHORT_RESPONSE, WAITING_FOR_KEYFRAME, PREBUFFERING };
State state = READING_REQUEST;
std::string url;
Stream *stream = nullptr;
+ // If true, we don't actually serve the stream, but its HLS playlist.
+ // TODO: Maybe this shouldn't be part of Client, since it's only
+ // really used in communicating once from parse_request() to
+ // process_client(); it's not permanent state (and is not serialized).
+ bool serving_hls_playlist = false;
+
+ // Whether we should close the connection after sending the response.
+ // Not relevant for READING_REQUEST. Must be true if http_11 is false.
+ bool close_after_response;
+
+ // Whether the request came in over HTTP/1.1 or higher.
+ bool http_11;
+
// The header we want to send, or the response with headers if we know
// it in its entirety after reading the request (typically an error).
// This is nominally a copy of Stream::header, but since that might
// change on reconnects etc., we keep a local copy here. Only relevant
// for SENDING_HEADER or SENDING_SHORT_RESPONSE; blank otherwise.
- std::string header_or_short_response;
+ //
+ // Must start with the string "HTTP/1.0 ", which will be changed to 1.1
+ // if relevant.
+ const std::string *header_or_short_response = nullptr;
+
+ // <header_or_short_response> can come from two distinct places; it can be
+ // local to the Client object, or it can be shared between many Clients
+ // (typically HLS playlists, that can be so large that they are expensive
+ // to hold in many copies). <header_or_short_response> will point to exactly
+ // one of these, which should be cleared out/dereferenced when it is
+ // no longer needed.
+ //
+ // The use of shared_ptr is somewhat overkill since we don't need
+ // to access the HLS playlists from multiple threads, but it's not a
+ // big deal for us.
+ std::string header_or_short_response_holder;
+ std::shared_ptr<const std::string> header_or_short_response_ref;
// Number of bytes we've sent of the header. Only relevant for SENDING_HEADER
// or SENDING_SHORT_RESPONSE.
// -1 means we want to send from the end of the backlog (the normal case),
// although only at a keyframe.
// -2 means we want to send from the _beginning_ of the backlog.
+ // -3 means we sent the header only.
+ static const uint64_t STREAM_POS_AT_END = -1;
+ static const uint64_t STREAM_POS_AT_START = -2;
+ static const uint64_t STREAM_POS_HEADER_ONLY = -3;
+
// Once we go into WAITING_FOR_KEYFRAME, PREBUFFERING or SENDING_DATA,
// these negative values will be translated to real numbers.
- size_t stream_pos = 0;
+ uint64_t stream_pos = 0;
+
+ // Position at which to end the stream (one-past-the-end, used for fragments).
+ // -1 means never to end; this is the common case.
+ static const uint64_t STREAM_POS_NO_END = -1;
+ uint64_t stream_pos_end = 0;
// Number of bytes we've sent of data. Only relevant for SENDING_DATA.
- size_t bytes_sent = 0;
+ uint64_t bytes_sent = 0;
// Number of times we've skipped forward due to the backlog being too big,
// and how many bytes we've skipped over in all. Only relevant for SENDING_DATA.
- size_t bytes_lost = 0, num_loss_events = 0;
+ uint64_t bytes_lost = 0, num_loss_events = 0;
TLSContext *tls_context = nullptr;
const unsigned char *tls_data_to_send = nullptr;
projects / cubemap / blobdiff