HTTP Downloader. More...

Collaboration diagram for Downloader:

Modules
	DownloaderCache
	HTTP Downloader Cache.

Data Structures
struct	GF_URL_Info_Struct

struct	GF_NETIO_Parameter

Typedefs
typedef struct __gf_download_manager	GF_DownloadManager

typedef struct __gf_download_session	GF_DownloadSession

typedef struct __gf_filter_session	GF_DownloadFilterSession

typedef void(*	gf_dm_on_usr_pass) (void usr_cbk, const char usr_name, const char *password, Bool store_info)
	callback function for authentication More...

typedef Bool(*	gf_dm_get_usr_pass) (void usr_cbk, const char site_url, char usr_name, char password, gf_dm_on_usr_pass async_pass, void *async_udta)
	function for authentication More...

typedef void(*	gf_dm_user_io) (void usr_cbk, GF_NETIO_Parameter parameter)
	callback function for data reception and state signaling More...

Enumerations
enum	GF_NetIOStatus { GF_NETIO_SETUP = 0, GF_NETIO_CONNECTED, GF_NETIO_GET_METHOD, GF_NETIO_GET_HEADER, GF_NETIO_GET_CONTENT, GF_NETIO_WAIT_FOR_REPLY, GF_NETIO_PARSE_HEADER, GF_NETIO_PARSE_REPLY, GF_NETIO_DATA_EXCHANGE, GF_NETIO_DATA_TRANSFERED, GF_NETIO_DISCONNECTED, GF_NETIO_STATE_ERROR, GF_NETIO_REQUEST_SESSION, GF_NETIO_CANCEL_STREAM }

enum	GF_NetIOFlags { GF_NETIO_SESSION_NOT_THREADED = 1, GF_NETIO_SESSION_NOT_CACHED = 1<<1, GF_NETIO_SESSION_NOTIFY_DATA = 1<<2, GF_NETIO_SESSION_PERSISTENT = 1<<3, GF_NETIO_SESSION_MEMORY_CACHE = 1<<4, GF_NETIO_SESSION_KEEP_CACHE = 1<<5, GF_NETIO_SESSION_KEEP_FIRST_CACHE = 1<<6 }

enum	{ GF_HTTP_UNKNOWN = 0, GF_HTTP_GET, GF_HTTP_HEAD, GF_HTTP_OPTIONS, GF_HTTP_CONNECT, GF_HTTP_TRACE, GF_HTTP_PUT, GF_HTTP_POST, GF_HTTP_DELETE }

Functions
GF_Err	gf_dm_get_url_info (const char url, GF_URL_Info info, const char *baseURL)

void	gf_dm_url_info_init (GF_URL_Info *info)

void	gf_dm_url_info_del (GF_URL_Info *info)

GF_DownloadManager *	gf_dm_new (GF_DownloadFilterSession *fsess)
	download manager constructor More...

void	gf_dm_del (GF_DownloadManager *dm)
	download manager destructor More...

void	gf_dm_set_auth_callback (GF_DownloadManager dm, gf_dm_get_usr_pass get_pass, void usr_cbk)
	password retrieval assignment More...

GF_DownloadSession *	gf_dm_sess_new (GF_DownloadManager dm, const char url, u32 dl_flags, gf_dm_user_io user_io, void usr_cbk, GF_Err error)
	download session constructor More...

GF_DownloadSession *	gf_dm_sess_new_simple (GF_DownloadManager dm, const char url, u32 dl_flags, gf_dm_user_io user_io, void usr_cbk, GF_Err e)
	download session simple constructor More...

void	gf_dm_sess_del (GF_DownloadSession *sess)
	downloader session destructor More...

void	gf_dm_sess_abort (GF_DownloadSession *sess)
	aborts downloading More...

GF_Err	gf_dm_sess_last_error (GF_DownloadSession *sess)
	gets last session error More...

GF_Err	gf_dm_sess_fetch_data (GF_DownloadSession sess, char buffer, u32 buffer_size, u32 *read_size)
	fetches data on session More...

const char *	gf_dm_sess_mime_type (GF_DownloadSession *sess)
	get mime type as lower case More...

GF_Err	gf_dm_sess_set_range (GF_DownloadSession *sess, u64 start_range, u64 end_range, Bool discontinue_cache)
	sets session range More...

const char *	gf_dm_sess_get_cache_name (GF_DownloadSession *sess)
	get cache file name More...

void	gf_dm_delete_cached_file_entry (const GF_DownloadManager dm, const char url)
	Marks the cache file to be deleted once the file is not used anymore by any session. More...

void	gf_dm_delete_cached_file_entry_session (const GF_DownloadSession sess, const char url)

GF_Err	gf_dm_sess_get_stats (GF_DownloadSession sess, const char server, const char path, u64 total_size, u64 bytes_done, u32 bytes_per_sec, GF_NetIOStatus *net_status)
	get statistics More...

u64	gf_dm_sess_get_utc_start (GF_DownloadSession *sess)
	get start time More...

GF_Err	gf_dm_sess_process (GF_DownloadSession *sess)
	fetch session object More...

GF_Err	gf_dm_sess_process_headers (GF_DownloadSession *sess)
	fetch session object headers More...

const char *	gf_dm_sess_get_resource_name (GF_DownloadSession *sess)
	Get session resource url. More...

GF_Err	gf_dm_wget_with_cache (GF_DownloadManager dm, const char url, const char filename, u64 start_range, u64 end_range, char *redirected_url)

GF_Err	gf_dm_wget (const char url, const char filename, u64 start_range, u64 end_range, char **redirected_url)
	Same as gf_dm_wget_with_cache, but initializes the GF_DownloadManager by itself. More...

GF_Err	gf_dm_sess_setup_from_url (GF_DownloadSession sess, const char url, Bool allow_direct_reuse)

const char *	gf_dm_sess_get_header (GF_DownloadSession sess, const char name)
	retrieves the HTTP header value for the given name More...

GF_Err	gf_dm_sess_enum_headers (GF_DownloadSession sess, u32 idx, const char hdr_name, const char hdr_val)
	enumerates the HTTP headers for a session More...

void	gf_dm_set_data_rate (GF_DownloadManager *dm, u32 rate_in_bits_per_sec)
	sets download manager max rate per session More...

u32	gf_dm_get_data_rate (GF_DownloadManager *dm)
	gets download manager max rate per session More...

u32	gf_dm_get_global_rate (GF_DownloadManager *dm)
	gets cumultaed download rate for all sessions More...

GF_Err	gf_dm_sess_get_header_sizes_and_times (GF_DownloadSession sess, u32 req_hdr_size, u32 rsp_hdr_size, u32 connect_time, u32 reply_time, u32 download_time)
	Get header sizes and times stats for the session. More...

void	gf_dm_sess_force_memory_mode (GF_DownloadSession *sess, u32 force_cache_type)
	Forces session to use memory storage. More...

GF_Err	gf_dm_set_localcache_provider (GF_DownloadManager dm, Bool(local_cache_url_provider_cbk)(void udta, char url, Bool is_cache_destroy), void *lc_udta)

DownloadedCacheEntry	gf_dm_add_cache_entry (GF_DownloadManager dm, const char szURL, GF_Blob blob, u64 start_range, u64 end_range, const char mime, Bool clone_memory, u32 download_time_ms)

GF_Err	gf_dm_force_headers (GF_DownloadManager dm, const DownloadedCacheEntry entry, const char headers)

Detailed Description

This section documents the file downloading tools the GPAC framework. Currently HTTP and HTTPS are supported. HTTPS may not be supported depending on GPAC compilation options (HTTPS in GPAC needs OpenSSL installed on the system).

Data Structure Documentation

◆ GF_URL_Info_Struct

struct GF_URL_Info_Struct

URL information object

Data Fields
const char *	protocol
char *	server_name
char *	remotePath
char *	canonicalRepresentation
char *	userName
char *	password
u16	port

◆ GF_NETIO_Parameter

struct GF_NETIO_Parameter

protocol I/O parameter

Data Fields
GF_NetIOStatus	msg_type	parameter message type
GF_Err	error
const u8 *	data	data received or data to send. Only valid for GF_NETIO_GET_CONTENT and GF_NETIO_DATA_EXCHANGE (when no cache is setup) messages
u32	size	size of associated data. Only valid for GF_NETIO_GET_CONTENT and GF_NETIO_DATA_EXCHANGE messages
const char *	name
char *	value
u32	reply
GF_DownloadSession *	sess

Typedef Documentation

◆ GF_DownloadManager

typedef struct __gf_download_manager GF_DownloadManager

the download manager object. This is usually not used by GPAC modules

◆ GF_DownloadSession

typedef struct __gf_download_session GF_DownloadSession

the download manager session.

◆ GF_DownloadFilterSession

typedef struct __gf_filter_session GF_DownloadFilterSession

the optional filter session.

◆ gf_dm_on_usr_pass

typedef void(* gf_dm_on_usr_pass) (void *usr_cbk, const char *usr_name, const char *password, Bool store_info)

This function is called back after user and password has been entered

Parameters

usr_cbk	opaque user data passed by download manager
usr_name	the user name for the desired site, or NULL if the authentication was canceled
password	the password for the desired site and user, or NULL if the authentication was canceled
store_info	if TRUE, credentials will be stored in gpac config

◆ gf_dm_get_usr_pass

typedef Bool(* gf_dm_get_usr_pass) (void *usr_cbk, const char *site_url, char *usr_name, char *password, gf_dm_on_usr_pass async_pass, void *async_udta)

The gf_dm_get_usr_pass type is the type for the callback of the gf_dm_set_auth_callback function used for password retrieval

Parameters

usr_cbk	opaque user data
site_url	url of the site the user and password are requested for
usr_name	the user name for this site. The allocated space for this buffer is 50 bytes.

Note: this varaibale may already be formatted.

Parameters

password	the password for this site and user. The allocated space for this buffer is 50 bytes.
async_pass	async function to call back when user and pass have been entered. If NULL, sync call will be performed
async_udta	async user data to pass back to the async function. If NULL, sync call will be performed

Returns: GF_FALSE if user didn't fill in the information which will result in an authentication failure, GF_TRUE otherwise (info was filled if not async, or request was posted).

◆ gf_dm_user_io

typedef void(* gf_dm_user_io) (void *usr_cbk, GF_NETIO_Parameter *parameter)

The gf_dm_user_io type is the type for the data callback function of a download session

Parameters

usr_cbk	opaque user data
parameter	the input/output parameter structure

Enumeration Type Documentation

◆ GF_NetIOStatus

enum GF_NetIOStatus

downloader session message types

Enumerator
GF_NETIO_SETUP	signal that session is setup and waiting for connection request
GF_NETIO_CONNECTED	signal that session connection is done
GF_NETIO_GET_METHOD	request a protocol method from the user. Default value is "GET" for HTTP
GF_NETIO_GET_HEADER	request a header from the user.
GF_NETIO_GET_CONTENT	requesting content from the user, if any. Content is appended to the request
GF_NETIO_WAIT_FOR_REPLY	signal that request is sent and waiting for server reply
GF_NETIO_PARSE_HEADER	signal a header to user.
GF_NETIO_PARSE_REPLY	signal request reply to user. The reply is always sent after the headers
GF_NETIO_DATA_EXCHANGE	send data to the user
GF_NETIO_DATA_TRANSFERED	all data has been transfered
GF_NETIO_DISCONNECTED	signal that the session has been deconnected
GF_NETIO_STATE_ERROR	downloader session failed (error code set) or done/destroyed (no error code)
GF_NETIO_REQUEST_SESSION	signal that a new session is being requested on that same connection (h2, h3) This is only used for server sessions
GF_NETIO_CANCEL_STREAM	stream has been canceled by remote peer

◆ GF_NetIOFlags

enum GF_NetIOFlags

session download flags

Enumerator
GF_NETIO_SESSION_NOT_THREADED	session is not threaded, the user must explicitly fetch the data , either with the function gf_dm_sess_fetch_data or the function gf_dm_sess_process- if the session is threaded, the user must call gf_dm_sess_process to start the session
GF_NETIO_SESSION_NOT_CACHED	session data is cached or not
GF_NETIO_SESSION_NOTIFY_DATA	forces data notification even when session is threaded
GF_NETIO_SESSION_KEEP_CACHE	do not delete files after download
GF_NETIO_SESSION_KEEP_FIRST_CACHE	do not delete files after download of first resource (used for init segments)

◆ anonymous enum

anonymous enum

HTTP methods

Enumerator
GF_HTTP_UNKNOWN	unsupported
GF_HTTP_GET	GET
GF_HTTP_HEAD	HEAD
GF_HTTP_OPTIONS	OPTIONS
GF_HTTP_CONNECT	CONNECT
GF_HTTP_TRACE	TRACE
GF_HTTP_PUT	PUT
GF_HTTP_POST	POST
GF_HTTP_DELETE	DELETE

Function Documentation

◆ gf_dm_get_url_info()

GF_Err gf_dm_get_url_info	(	const char *	url,
		GF_URL_Info *	info,
		const char *	baseURL
	)

Extracts the information from an URL. A call to gf_dm_url_info_init() must have been issue before calling this method.

Parameters

url	The URL to fill
info	This structure will be initialized properly and filled with the data
baseURL	The baseURL to use if any (can be null)

Returns: GF_OK if URL is well formed and supported by GPAC

◆ gf_dm_url_info_init()

void gf_dm_url_info_init ( GF_URL_Info * info )

Inits the GF_URL_Info structure before it can be used

Parameters

info	The structure to initialize

◆ gf_dm_url_info_del()

void gf_dm_url_info_del ( GF_URL_Info * info )

Frees the inner structures of a GF_URL_Info_Struct

Parameters

info	The info to free

◆ gf_dm_new()

GF_DownloadManager* gf_dm_new ( GF_DownloadFilterSession * fsess )

Creates a new download manager object.

Parameters

fsess optional filter session. If not NULL, the filter session will be used for async downloads. Otherwise, threads will be created

Returns: the download manager object

◆ gf_dm_del()

void gf_dm_del ( GF_DownloadManager * dm )

Deletes the download manager. All running sessions are aborted

Parameters

dm	the download manager object

◆ gf_dm_set_auth_callback()

void gf_dm_set_auth_callback	(	GF_DownloadManager *	dm,
		gf_dm_get_usr_pass	get_pass,
		void *	usr_cbk
	)

Assigns the callback function used for user password retrieval. If no such function is assigned to the download manager, all downloads requiring authentication will fail.

Parameters

dm	the download manager object
get_pass	specifies gf_dm_get_usr_pass callback function for user and password retrieval.
usr_cbk	opaque user data passed to callback function

◆ gf_dm_sess_new()

GF_DownloadSession* gf_dm_sess_new	(	GF_DownloadManager *	dm,
		const char *	url,
		u32	dl_flags,
		gf_dm_user_io	user_io,
		void *	usr_cbk,
		GF_Err *	error
	)

Creates a new download session

Parameters

dm	the download manager object
url	file to retrieve (no PUT/POST yet, only downloading is supported)
dl_flags	combination of session download flags
user_io	specifies gf_dm_user_io callback function for data reception and service messages
usr_cbk	opaque user data passed to callback function
error	error for failure cases

Returns: the session object or NULL if error. If no error is indicated and a NULL session is returned, this means the file is local

◆ gf_dm_sess_new_simple()

GF_DownloadSession* gf_dm_sess_new_simple	(	GF_DownloadManager *	dm,
		const char *	url,
		u32	dl_flags,
		gf_dm_user_io	user_io,
		void *	usr_cbk,
		GF_Err *	e
	)

Creates a new download session

Parameters

dm	The download manager used to create the download session
url	file to retrieve (no PUT/POST yet, only downloading is supported)
dl_flags	combination of session download flags
user_io	specifies gf_dm_user_io callback function for data reception and service messages
usr_cbk	opaque user data passed to callback function
e	error for failure cases

Returns: the session object or NULL if error. If no error is indicated and a NULL session is returned, this means the file is local

◆ gf_dm_sess_del()

void gf_dm_sess_del ( GF_DownloadSession * sess )

Deletes the download session, cleaning the cache if indicated in the configuration file of the download manager (section "Downloader", key "CleanCache")

Parameters

sess	the download session

◆ gf_dm_sess_abort()

void gf_dm_sess_abort ( GF_DownloadSession * sess )

Aborts all operations in the session, regardless of its state. The session cannot be reused once this is called.

Parameters

sess	the download session

◆ gf_dm_sess_last_error()

GF_Err gf_dm_sess_last_error ( GF_DownloadSession * sess )

Gets the last error that occured in the session

Parameters

sess	the download session

Returns: the last error

◆ gf_dm_sess_fetch_data()

GF_Err gf_dm_sess_fetch_data	(	GF_DownloadSession *	sess,
		char *	buffer,
		u32	buffer_size,
		u32 *	read_size
	)

Fetches data from the server. This will also performs connections and all needed exchange with server.

Parameters

sess	the download session
buffer	destination buffer
buffer_size	destination buffer allocated size
read_size	amount of data actually fetched

Note: this can only be used when the session is not threaded

Returns: error if any

◆ gf_dm_sess_mime_type()

const char* gf_dm_sess_mime_type ( GF_DownloadSession * sess )

Fetches the mime type of the URL this session is fetching, value will be returned lower case, so application/x-mpegURL will be returned as application/x-mpegurl

Parameters

sess	the download session

Returns: the mime type of the URL, or NULL if error. You should get the error with gf_dm_sess_last_error

◆ gf_dm_sess_set_range()

GF_Err gf_dm_sess_set_range	(	GF_DownloadSession *	sess,
		u64	start_range,
		u64	end_range,
		Bool	discontinue_cache
	)

Sets the session byte range. This shll be called before processing the session.

Parameters

sess	the download session
start_range	HTTP download start range in byte
end_range	HTTP download end range in byte
discontinue_cache	If set, forces a new cache entry if byte range are not continuous. Otherwise a single cache entry is used to reconstruct the file

Note: this can only be used when the session is not threaded

Returns: error if any

◆ gf_dm_sess_get_cache_name()

const char* gf_dm_sess_get_cache_name ( GF_DownloadSession * sess )

Gets the cache file name for the session.

Parameters

sess	the download session

Returns: the absolute path of the cache file, or NULL if the session is not cached

◆ gf_dm_delete_cached_file_entry()

void gf_dm_delete_cached_file_entry	(	const GF_DownloadManager *	dm,
		const char *	url
	)

Parameters

dm	the download manager
url	The URL associate to the cache entry to be deleted

◆ gf_dm_delete_cached_file_entry_session()

void gf_dm_delete_cached_file_entry_session	(	const GF_DownloadSession *	sess,
		const char *	url
	)

Marks the cache file for this session to be deleted once the file is not used anymore by any session

Parameters

sess	the download session
url	The URL associate to the cache entry to be deleted

◆ gf_dm_sess_get_stats()

GF_Err gf_dm_sess_get_stats	(	GF_DownloadSession *	sess,
		const char **	server,
		const char **	path,
		u64 *	total_size,
		u64 *	bytes_done,
		u32 *	bytes_per_sec,
		GF_NetIOStatus *	net_status
	)

Gets download statistics for the session. All output parameters are optional and may be set to NULL.

Parameters

sess	the download session
server	the remote server address
path	the path on the remote server
total_size	the total size in bytes the file fetched, 0 if unknown.
bytes_done	the amount of bytes received from the server
bytes_per_sec	the average data rate in bytes per seconds
net_status	the session status

Returns: error if any

◆ gf_dm_sess_get_utc_start()

u64 gf_dm_sess_get_utc_start ( GF_DownloadSession * sess )

Gets session start time in UTC. If chunk-transfer is used, the start time is reset at each chunk start

Parameters

sess	the download session

Returns: UTC start time

◆ gf_dm_sess_process()

GF_Err gf_dm_sess_process ( GF_DownloadSession * sess )

Fetches the session object (process all headers and data transfer). This is only usable if the session is not threaded

Parameters

sess	the download session

Returns: the last error in the session or 0 if none

◆ gf_dm_sess_process_headers()

GF_Err gf_dm_sess_process_headers ( GF_DownloadSession * sess )

Fetch the session object headers and stops after that. This is only usable if the session is not threaded

Parameters

sess	the download session

Returns: the last error in the session or 0 if none

◆ gf_dm_sess_get_resource_name()

const char* gf_dm_sess_get_resource_name ( GF_DownloadSession * sess )

Returns the original resource URL associated with the session

Parameters

sess	the download session

Returns: the associated URL

◆ gf_dm_wget_with_cache()

GF_Err gf_dm_wget_with_cache	(	GF_DownloadManager *	dm,
		const char *	url,
		const char *	filename,
		u64	start_range,
		u64	end_range,
		char **	redirected_url
	)

Downloads a file over the network using a download manager

Parameters

dm	The download manager to use, function will use all associated cache resources
url	The url to download
filename	The filename to download
start_range	start position of a byte range
end_range	end position of a byte range
redirected_url	If not NULL, `redirected_url` will be allocated and filled with the URL after redirection. Caller takes ownership

Returns: GF_OK if everything went fine, an error otherwise

◆ gf_dm_wget()

GF_Err gf_dm_wget	(	const char *	url,
		const char *	filename,
		u64	start_range,
		u64	end_range,
		char **	redirected_url
	)

This function is deprecated, please use gf_dm_wget_with_cache instead

Parameters

url	The url to download
filename	The filename to download
start_range	start position of a byte range
end_range	end position of a byte range
redirected_url	If not NULL, `redirected_url` will be allocated and filled with the URL after redirection. Caller takes ownership

Returns: GF_OK if everything went fine, an error otherwise

◆ gf_dm_sess_setup_from_url()

GF_Err gf_dm_sess_setup_from_url	(	GF_DownloadSession *	sess,
		const char *	url,
		Bool	allow_direct_reuse
	)

Re-setup an existing, completed session to download a new URL. If same server/port/protocol is used, the same socket will be reused if the session has the GF_NETIO_SESSION_PERSISTENT flag set. This is only possible if the session is not threaded.

Parameters

sess	The session
url	The new url for the session
allow_direct_reuse	Allow reuse of cache entry without checking cache directives

Returns: GF_OK or error

◆ gf_dm_sess_get_header()

const char* gf_dm_sess_get_header	(	GF_DownloadSession *	sess,
		const char *	name
	)

Retrieves the HTTP header value for the given header name.

Parameters

sess	the current session
name	the target header name

Returns: header value or NULL if not found

◆ gf_dm_sess_enum_headers()

GF_Err gf_dm_sess_enum_headers	(	GF_DownloadSession *	sess,
		u32 *	idx,
		const char **	hdr_name,
		const char **	hdr_val
	)

Retrieves the HTTP header name and value for the given header index.

Parameters

sess	the current session
idx	index for the enumeration, must be initialized to 0 for the first call
hdr_name	where name of header is stored - do not free
hdr_val	where value of header is stored - do not free

Returns: error code, GF_OK or GF_EOS if no more headers

◆ gf_dm_set_data_rate()

void gf_dm_set_data_rate	(	GF_DownloadManager *	dm,
		u32	rate_in_bits_per_sec
	)

Sets the maximum rate (per session only at the current time).

Parameters

dm	the download manager object
rate_in_bits_per_sec	the new rate in bits per sec. If 0, HTTP rate will not be limited

◆ gf_dm_get_data_rate()

u32 gf_dm_get_data_rate ( GF_DownloadManager * dm )

Sets the maximum rate (per session only at the current time).

Parameters

dm	the download manager object

Returns: the rate in bits per sec. If 0, HTTP rate is not limited

◆ gf_dm_get_global_rate()

u32 gf_dm_get_global_rate ( GF_DownloadManager * dm )

Gets the cumultated bitrate in of all active sessions.

Parameters

dm	the download manager object

Returns: the cumulated rate in bits per sec.

◆ gf_dm_sess_get_header_sizes_and_times()

GF_Err gf_dm_sess_get_header_sizes_and_times	(	GF_DownloadSession *	sess,
		u32 *	req_hdr_size,
		u32 *	rsp_hdr_size,
		u32 *	connect_time,
		u32 *	reply_time,
		u32 *	download_time
	)

Get header sizes and times stats for the session

Parameters

sess	the current session
req_hdr_size	request header size in bytes. May be NULL.
rsp_hdr_size	response header size in bytes. May be NULL.
connect_time	connection time in micro seconds. May be NULL.
reply_time	elapsed time between request sent and response header received, in micro seconds. May be NULL.
download_time	download time since request sent, in micro seconds. May be NULL.

Returns: error code if any

◆ gf_dm_sess_force_memory_mode()

void gf_dm_sess_force_memory_mode	(	GF_DownloadSession *	sess,
		u32	force_cache_type
	)

Forces session to use memory storage for future downloads

Parameters

sess	the current session
force_cache_type	if 1, cache will be kept even if session is reassigned. If 2, cache will ne kept for next resource downloaded, then no caching for subsequent resources (used for init segments)

◆ gf_dm_set_localcache_provider()

GF_Err gf_dm_set_localcache_provider	(	GF_DownloadManager *	dm,
		Bool()(void udta, char *url, Bool is_cache_destroy)	local_cache_url_provider_cbk,
		void *	lc_udta
	)

Registers a local cache provider (bypassing the http session), used when populating cache from input data (ROUTE for example)

Parameters

dm	the download manager
local_cache_url_provider_cbk	callback function to the cache provider. The callback function shall return GF_TRUE if the requested URL is provided by this local cache
lc_udta	opaque pointer passed to the callback function

Returns: error code if any

◆ gf_dm_add_cache_entry()

DownloadedCacheEntry gf_dm_add_cache_entry	(	GF_DownloadManager *	dm,
		const char *	szURL,
		GF_Blob *	blob,
		u64	start_range,
		u64	end_range,
		const char *	mime,
		Bool	clone_memory,
		u32	download_time_ms
	)

Adds a local entry in the cache

Parameters

dm	the download manager
szURL	the URL this resource is caching
blob	blob object holding the data of the resource
start_range	start range of the data in the resource
end_range	start range of the data in the resource. If both start_range and end_range are 0, the data is the complete resource
mime	associated MIME type if any
clone_memory	indicates that the data shall be cloned in the cache because the caller will discard it
download_time_ms	indicates the download time of the associated resource, if known, 0 otherwise.

Returns: a cache entry structure

◆ gf_dm_force_headers()

GF_Err gf_dm_force_headers	(	GF_DownloadManager *	dm,
		const DownloadedCacheEntry	entry,
		const char *	headers
	)

Forces HTTP headers for a given cache entry

Parameters

dm	the download manager
entry	the cache entry to update
headers	the header string, including CRLF delimiters, to force

Returns: error code if any

Modules

Data Structures

Typedefs

Enumerations

Functions

Detailed Description

Data Structure Documentation

◆ GF_URL_Info_Struct

◆ GF_NETIO_Parameter

Typedef Documentation

◆ GF_DownloadManager

◆ GF_DownloadSession

◆ GF_DownloadFilterSession

◆ gf_dm_on_usr_pass

◆ gf_dm_get_usr_pass

◆ gf_dm_user_io

Enumeration Type Documentation

◆ GF_NetIOStatus

◆ GF_NetIOFlags

◆ anonymous enum

Function Documentation

◆ gf_dm_get_url_info()

◆ gf_dm_url_info_init()

◆ gf_dm_url_info_del()

◆ gf_dm_new()

◆ gf_dm_del()

◆ gf_dm_set_auth_callback()

◆ gf_dm_sess_new()

◆ gf_dm_sess_new_simple()

◆ gf_dm_sess_del()

◆ gf_dm_sess_abort()

◆ gf_dm_sess_last_error()

◆ gf_dm_sess_fetch_data()

◆ gf_dm_sess_mime_type()

◆ gf_dm_sess_set_range()

◆ gf_dm_sess_get_cache_name()

◆ gf_dm_delete_cached_file_entry()

◆ gf_dm_delete_cached_file_entry_session()

◆ gf_dm_sess_get_stats()

◆ gf_dm_sess_get_utc_start()

◆ gf_dm_sess_process()

◆ gf_dm_sess_process_headers()

◆ gf_dm_sess_get_resource_name()

◆ gf_dm_wget_with_cache()

◆ gf_dm_wget()

◆ gf_dm_sess_setup_from_url()

◆ gf_dm_sess_get_header()

◆ gf_dm_sess_enum_headers()

◆ gf_dm_set_data_rate()

◆ gf_dm_get_data_rate()

◆ gf_dm_get_global_rate()

◆ gf_dm_sess_get_header_sizes_and_times()

◆ gf_dm_sess_force_memory_mode()

◆ gf_dm_set_localcache_provider()

◆ gf_dm_add_cache_entry()

◆ gf_dm_force_headers()