11 #include "metacube2.h"
16 // Despite the name, covers input over both HTTP and pipes, both typically
17 // wrapped in Metacube.
18 class HTTPInput : public Input {
20 HTTPInput(const std::string &url, Input::Encoding encoding);
22 // Serialization/deserialization.
23 HTTPInput(const InputProto &serialized);
24 virtual InputProto serialize() const;
26 virtual void close_socket();
28 virtual std::string get_url() const { return url; }
30 virtual void add_destination(int stream_index);
32 virtual InputStats get_stats() const;
35 // Actually does the download.
36 virtual void do_work();
38 // Open a socket that connects to the given host and port. Does DNS resolving.
39 int lookup_and_connect(const std::string &host, const std::string &port);
41 // Open a child process with the given command line (given to /bin/sh).
42 // Returns a pipe to its standard output.
43 int open_child_process(const std::string &cmdline);
45 // Parses a HTTP response. Returns false if it not a 200.
46 bool parse_response(const std::string &response);
48 // Stores the given data, looks for Metacube blocks (skipping data if needed),
49 // and calls process_block() for each one.
50 void process_data(char *ptr, size_t bytes);
52 // Drops <num_bytes> bytes from the head of <pending_data>,
53 // and outputs a warning.
54 void drop_pending_data(size_t num_bytes);
56 void process_metacube_metadata_block(const metacube2_block_header &hdr, const char *payload, uint32_t payload_size);
63 CLOSING_SOCKET, // Due to error.
67 std::vector<int> stream_indices;
69 // The URL and its parsed components.
71 std::string host, port, path;
73 // What the input stream is to be interpreted as (normally Metacube).
74 Input::Encoding encoding;
76 // The HTTP request, with headers and all.
77 // Only relevant for SENDING_REQUEST.
80 // How many bytes we've sent of the request so far.
81 // Only relevant for SENDING_REQUEST.
82 size_t request_bytes_sent;
84 // The HTTP response we've received so far. Only relevant for RECEIVING_HEADER.
87 // The HTTP response headers we want to give clients for this input.
88 std::string http_header;
90 // The stream heder we want to give clients for this input.
91 std::string stream_header;
93 // Data we have received but not fully processed yet.
94 std::vector<char> pending_data;
96 // If <pending_data> starts with a Metacube header,
98 bool has_metacube_header = false;
100 // The socket we are downloading on (or -1).
103 // pid of the child process (or -1).
104 pid_t child_pid = -1;
106 // Mutex protecting <stats>.
107 mutable std::mutex stats_mutex;
109 // The current statistics for this connection. Protected by <stats_mutex>.
112 // Number of (started) connection attempts since last data byte was successfully read.
113 unsigned num_connection_attempts = 0;
115 // If set, don't log anything related to connections.
116 // (Only set if we've had enough unsuccessful connection attempts.)
117 bool suppress_logging = false;
119 // Last time we made a connection with logging enabled.
120 // (Initially at some point before the epoch.)
121 timespec last_verbose_connection { -3600, 0 };
123 // If we've received a Metacube2 PTS metadata block, it belongs to the
124 // next regular block we receive, and is stored here in the meantime.
125 // If we haven't received one yet (or we've already received the
126 // corresponding data block), this is empty, ie., timebase_num == 0.
127 RationalPTS next_block_pts;
130 #endif // !defined(_HTTPINPUT_H)