gstreamer/subprojects/gst-plugins-good/ext/adaptivedemux2/downloadrequest.h
Jan Schmidt a3770523c0 adaptivedemux2/downloadrequest: add a helper to retrieve the Age header
Add a method to look at HTTP response headers and parse and return any Age
header, provided by caching proxy servers if the data was provided from a cache.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/3883>
2023-02-03 16:52:22 +00:00

116 lines
4.7 KiB
C

/* GStreamer
* Copyright (C) 2011 Andoni Morales Alastruey <ylatuya@gmail.com>
* Copyright (C) 2021-2022 Jan Schmidt <jan@centricular.com>
*
* downloadrequest.h:
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __DOWNLOAD_REQUEST_H__
#define __DOWNLOAD_REQUEST_H__
#include <gst/gst.h>
G_BEGIN_DECLS
#define DOWNLOAD_REQUEST(obj) ((DownloadRequest *)(obj))
typedef struct _DownloadRequest DownloadRequest;
typedef enum _DownloadRequestState DownloadRequestState;
typedef void (*DownloadRequestEventCallback) (DownloadRequest *request, DownloadRequestState state, void *cb_data);
enum _DownloadRequestState {
DOWNLOAD_REQUEST_STATE_UNSENT,
DOWNLOAD_REQUEST_STATE_OPEN, /* Request sent, but no response yet */
DOWNLOAD_REQUEST_STATE_HEADERS_RECEIVED, /* Response headers received, awaiting body */
DOWNLOAD_REQUEST_STATE_LOADING, /* Content loading in progress */
DOWNLOAD_REQUEST_STATE_COMPLETE, /* Request processing finished successfully - check status_code for completion 200-399 codes */
DOWNLOAD_REQUEST_STATE_ERROR, /* Request generated an http error - check status_code */
};
struct _DownloadRequest
{
gint ref_count;
gboolean in_use; /* TRUE if this request is being serviced */
gboolean send_progress; /* TRUE if this request wants progress events */
DownloadRequestState state;
guint status_code; /* HTTP status code */
/* Request parameters */
gchar * uri; /* URI of the request */
gint64 range_start;
gint64 range_end;
/* possibly populated during a download */
gchar * redirect_uri; /* Redirect target if any */
gboolean redirect_permanent; /* If the redirect is permanent */
GstStructure *headers; /* HTTP request/response headers */
guint64 content_length; /* Response content length, if known (or 0) */
guint64 content_received; /* Response content received so far */
guint64 download_request_time; /* Epoch time when the download started */
guint64 download_start_time; /* Epoch time when the first data for the download arrived */
guint64 download_newest_data_time; /* Epoch time when the most recent data for the download arrived */
guint64 download_end_time; /* Epoch time when the download finished */
};
void download_request_set_uri (DownloadRequest *request, const gchar *uri,
gint64 range_start, gint64 range_end);
/* Reset the request state back to UNSENT and clear any stored info. The request must not be in use */
void download_request_reset (DownloadRequest *request);
void download_request_begin_download (DownloadRequest *request);
void download_request_set_caps (DownloadRequest * request, GstCaps * caps);
GstCaps * download_request_get_caps (DownloadRequest * request);
GstClockTime download_request_get_age (DownloadRequest *request);
void download_request_add_buffer (DownloadRequest *request, GstBuffer *buffer);
GstBuffer * download_request_take_buffer (DownloadRequest *request);
GstBuffer * download_request_take_buffer_range (DownloadRequest *request, gint64 range_start, gint64 range_end);
guint64 download_request_get_bytes_available (DownloadRequest *request);
guint64 download_request_get_cur_offset (DownloadRequest *request);
DownloadRequest * download_request_new (void);
DownloadRequest * download_request_new_uri (const gchar * uri);
DownloadRequest * download_request_new_uri_range (const gchar * uri, gint64 range_start, gint64 range_end);
void download_request_set_callbacks (DownloadRequest *request,
DownloadRequestEventCallback on_completion,
DownloadRequestEventCallback on_error,
DownloadRequestEventCallback on_cancellation,
DownloadRequestEventCallback on_progress,
void *cb_data);
DownloadRequest *download_request_ref (DownloadRequest *request);
void download_request_unref (DownloadRequest *request);
void download_request_lock (DownloadRequest *request);
void download_request_unlock (DownloadRequest *request);
void download_request_despatch_progress (DownloadRequest *request);
void download_request_despatch_completion (DownloadRequest *request);
G_END_DECLS
#endif /* __DOWNLOAD_REQUEST_H__ */