HTTP回调事件

typedef enum http_event_type {
    http_event_type_on_error = ~0x0,
    http_event_type_on_connect = 0x0001 << 0,
    http_event_type_on_request = 0x0001 << 1,
    http_event_type_on_response = 0x0001 << 2,
    http_event_type_on_headers = 0x0001 << 3,
    http_event_type_on_body = 0x0001 << 4,
    http_event_type_on_submit = 0x0001 << 5,
    http_event_type_on_release = 0x0001 << 6,
    http_event_type_all = 0x0001 << 7
} http_event_type_t;

typedef int (*http_event_cb_t)(void *e);

typedef struct http_event {
    http_event_type_t       type;           /* http_event_type_t type */
    void                    *context;
    void                    *data;
    size_t                  len;
    http_event_cb_t         cb;
} http_event_t;