Factor all the common thread starting/stopping into a common Thread class.

[cubemap] / input.h

diff --git a/input.h b/input.h
index 508eb59ae68cac1ba029c88caae5f67bbff73000..14537c85c6010900b8cb6c096cd8f48606ac648b 100644 (file)
--- a/input.h
+++ b/input.h
@@ -4,37 +4,66 @@
 #include <vector>
 #include <string>
 
-class Input {
+#include "thread.h"
+
+class InputProto;
+
+class Input : public Thread {
 public:
        Input(const std::string &stream_id, const std::string &url);
 
-       // Connect to the given URL and start streaming.
-       void run();
+       // Serialization/deserialization.
+       Input(const InputProto &serialized);
+       InputProto serialize() const;
 
-       // Stop streaming. NOTE: Does not currently work!
-       void stop();
+       std::string get_url() const { return url; }
 
 private:
-       // Recovers the this pointer and calls do_work().
-       static void *do_work_thunk(void *arg);
-
        // Actually does the download.
-       void do_work();
+       virtual void do_work();
+       
+       // Open a socket that connects to the given host and port. Does DNS resolving.
+       int lookup_and_connect(const std::string &host, const std::string &port);
 
-       // Recovers the this pointer and calls curl_callback().
-       static size_t curl_callback_thunk(char *ptr, size_t size, size_t nmemb, void *userdata);
+       // Parses a HTTP response. Returns false if it not a 200.
+       bool parse_response(const std::string &response);
 
        // Stores the given data, looks for Metacube blocks (skipping data if needed),
        // and calls process_block() for each one.
-       void curl_callback(char *ptr, size_t bytes);
-       void process_block(const char *data, uint32_t size, uint32_t flags);
+       void process_data(char *ptr, size_t bytes);
 
        // Drops <num_bytes> bytes from the head of <pending_data>,
        // and outputs a warning.
        void drop_pending_data(size_t num_bytes);
 
+       enum State {
+               NOT_CONNECTED,
+               SENDING_REQUEST,
+               RECEIVING_HEADER,
+               RECEIVING_DATA,
+               CLOSING_SOCKET,  // Due to error.
+       };
+       State state;
+
        std::string stream_id;
+
+       // The URL and its parsed components.
        std::string url;
+       std::string host, port, path;
+
+       // The HTTP request, with headers and all.
+       // Only relevant for SENDING_REQUEST.
+       std::string request;
+
+       // How many bytes we've sent of the request so far.
+       // Only relevant for SENDING_REQUEST.
+       size_t request_bytes_sent;
+
+       // The HTTP response we've received so far. Only relevant for RECEIVING_HEADER.
+       std::string response;
+
+       // The HTTP respones headers we want to give clients for this input.
+       std::string http_header;
 
        // Data we have received but not fully processed yet.
        std::vector<char> pending_data;
@@ -43,10 +72,8 @@ private:
        // this is true.
        bool has_metacube_header;
 
-       pthread_t worker_thread;
-
-       // Whether we should stop or not.
-       volatile bool should_stop;
+       // The socket we are downloading on (or -1).
+       int sock;       
 };
 
 #endif  // !defined(_INPUT_H)