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a3770523c0
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>
116 lines
4.7 KiB
C
116 lines
4.7 KiB
C
/* GStreamer
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* Copyright (C) 2011 Andoni Morales Alastruey <ylatuya@gmail.com>
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* Copyright (C) 2021-2022 Jan Schmidt <jan@centricular.com>
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*
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* downloadrequest.h:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __DOWNLOAD_REQUEST_H__
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#define __DOWNLOAD_REQUEST_H__
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#include <gst/gst.h>
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G_BEGIN_DECLS
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#define DOWNLOAD_REQUEST(obj) ((DownloadRequest *)(obj))
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typedef struct _DownloadRequest DownloadRequest;
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typedef enum _DownloadRequestState DownloadRequestState;
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typedef void (*DownloadRequestEventCallback) (DownloadRequest *request, DownloadRequestState state, void *cb_data);
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enum _DownloadRequestState {
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DOWNLOAD_REQUEST_STATE_UNSENT,
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DOWNLOAD_REQUEST_STATE_OPEN, /* Request sent, but no response yet */
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DOWNLOAD_REQUEST_STATE_HEADERS_RECEIVED, /* Response headers received, awaiting body */
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DOWNLOAD_REQUEST_STATE_LOADING, /* Content loading in progress */
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DOWNLOAD_REQUEST_STATE_COMPLETE, /* Request processing finished successfully - check status_code for completion 200-399 codes */
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DOWNLOAD_REQUEST_STATE_ERROR, /* Request generated an http error - check status_code */
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};
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struct _DownloadRequest
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{
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gint ref_count;
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gboolean in_use; /* TRUE if this request is being serviced */
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gboolean send_progress; /* TRUE if this request wants progress events */
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DownloadRequestState state;
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guint status_code; /* HTTP status code */
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/* Request parameters */
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gchar * uri; /* URI of the request */
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gint64 range_start;
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gint64 range_end;
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/* possibly populated during a download */
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gchar * redirect_uri; /* Redirect target if any */
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gboolean redirect_permanent; /* If the redirect is permanent */
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GstStructure *headers; /* HTTP request/response headers */
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guint64 content_length; /* Response content length, if known (or 0) */
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guint64 content_received; /* Response content received so far */
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guint64 download_request_time; /* Epoch time when the download started */
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guint64 download_start_time; /* Epoch time when the first data for the download arrived */
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guint64 download_newest_data_time; /* Epoch time when the most recent data for the download arrived */
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guint64 download_end_time; /* Epoch time when the download finished */
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};
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void download_request_set_uri (DownloadRequest *request, const gchar *uri,
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gint64 range_start, gint64 range_end);
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/* Reset the request state back to UNSENT and clear any stored info. The request must not be in use */
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void download_request_reset (DownloadRequest *request);
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void download_request_begin_download (DownloadRequest *request);
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void download_request_set_caps (DownloadRequest * request, GstCaps * caps);
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GstCaps * download_request_get_caps (DownloadRequest * request);
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GstClockTime download_request_get_age (DownloadRequest *request);
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void download_request_add_buffer (DownloadRequest *request, GstBuffer *buffer);
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GstBuffer * download_request_take_buffer (DownloadRequest *request);
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GstBuffer * download_request_take_buffer_range (DownloadRequest *request, gint64 range_start, gint64 range_end);
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guint64 download_request_get_bytes_available (DownloadRequest *request);
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guint64 download_request_get_cur_offset (DownloadRequest *request);
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DownloadRequest * download_request_new (void);
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DownloadRequest * download_request_new_uri (const gchar * uri);
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DownloadRequest * download_request_new_uri_range (const gchar * uri, gint64 range_start, gint64 range_end);
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void download_request_set_callbacks (DownloadRequest *request,
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DownloadRequestEventCallback on_completion,
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DownloadRequestEventCallback on_error,
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DownloadRequestEventCallback on_cancellation,
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DownloadRequestEventCallback on_progress,
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void *cb_data);
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DownloadRequest *download_request_ref (DownloadRequest *request);
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void download_request_unref (DownloadRequest *request);
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void download_request_lock (DownloadRequest *request);
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void download_request_unlock (DownloadRequest *request);
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void download_request_despatch_progress (DownloadRequest *request);
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void download_request_despatch_completion (DownloadRequest *request);
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G_END_DECLS
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#endif /* __DOWNLOAD_REQUEST_H__ */
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