[vlc-devel] [vlc-commits] UPnP discovery: Evaluate "TotalMatches" and "NumberReturned"

Felix Paul Kühne fkuehne at videolan.org
Sat Jun 13 11:44:56 CEST 2020


Hello,

Any objection not to back-port this to 3.0?

Best regards,

Felix

> On 12. Jun 2020, at 14:41, Andreas Krug <git at videolan.org> wrote:
> 
> vlc | branch: master | Andreas Krug <akrug at arcor.de> | Fri May  1 12:21:34 2020 +0200| [a1ef204f51c9b7bd3881931305c140c519081a6e] | committer: Hugo Beauzée-Luyssen
> 
> UPnP discovery: Evaluate "TotalMatches" and "NumberReturned"
> 
> Browse again with increased "StartingIndex" and adapted "RequestCount".
>    Solves
>    #21381 Panasonic Viera returns maximal 20 items on uPnP
>    #22496 DLNA/UPnP - Panasonic recorder 12 records limit
> 
> Fixes #15876
> 
> Signed-off-by: Felix Paul Kühne <felix at feepk.net>
> Signed-off-by: Hugo Beauzée-Luyssen <hugo at beauzee.fr>
> 
>> http://git.videolan.org/gitweb.cgi/vlc.git/?a=commit;h=a1ef204f51c9b7bd3881931305c140c519081a6e
> ---
> 
> modules/services_discovery/upnp.cpp | 94 ++++++++++++++++++++++---------------
> modules/services_discovery/upnp.hpp |  2 +-
> 2 files changed, 58 insertions(+), 38 deletions(-)
> 
> diff --git a/modules/services_discovery/upnp.cpp b/modules/services_discovery/upnp.cpp
> index 357d03be6d..054a5d1910 100644
> --- a/modules/services_discovery/upnp.cpp
> +++ b/modules/services_discovery/upnp.cpp
> @@ -1174,6 +1174,7 @@ int MediaServer::sendActionCb( Upnp_EventType eventType,
> IXML_Document* MediaServer::_browseAction( const char* psz_object_id_,
>                                            const char* psz_browser_flag_,
>                                            const char* psz_filter_,
> +                                           const char* psz_starting_index,
>                                            const char* psz_requested_count_,
>                                            const char* psz_sort_criteria_ )
> {
> @@ -1218,7 +1219,7 @@ IXML_Document* MediaServer::_browseAction( const char* psz_object_id_,
>     }
> 
>     i_res = UpnpAddToAction( &p_action, "Browse",
> -            CONTENT_DIRECTORY_SERVICE_TYPE, "StartingIndex", "0" );
> +            CONTENT_DIRECTORY_SERVICE_TYPE, "StartingIndex", psz_starting_index );
>     if ( i_res != UPNP_E_SUCCESS )
>     {
>         msg_Dbg( m_access, "AddToAction 'StartingIndex' failed: %s",
> @@ -1274,52 +1275,71 @@ browseActionCleanup:
>  */
> bool MediaServer::fetchContents()
> {
> -    IXML_Document* p_response = _browseAction( m_psz_objectId,
> -                                      "BrowseDirectChildren",
> -                                      "*",
> -                                      // Some servers don't understand "0" as "no-limit"
> -                                      "5000", /* RequestedCount */
> -                                      "" /* SortCriteria */
> -                                      );
> -    if ( !p_response )
> +    std::string StartingIndex = "0";
> +    std::string RequestedCount = "5000";
> +    const char* psz_TotalMatches = "0";
> +    const char* psz_NumberReturned = "0";
> +    long  l_reqCount = 0;
> +
> +    do
>     {
> -        msg_Err( m_access, "No response from browse() action" );
> -        return false;
> -    }
> +        IXML_Document* p_response = _browseAction( m_psz_objectId,
> +                                                  "BrowseDirectChildren",
> +                                                  "*",
> +                                                  StartingIndex.c_str(),
> +                                                  // Some servers don't understand "0" as "no-limit"
> +                                                  RequestedCount.c_str(), /* RequestedCount */
> +                                                  "" /* SortCriteria */
> +                                                  );
> +        if ( !p_response )
> +        {
> +            msg_Err( m_access, "No response from browse() action" );
> +            return false;
> +        }
> 
> -    IXML_Document* p_result = parseBrowseResult( p_response );
> +        psz_TotalMatches = xml_getChildElementValue( (IXML_Element*)p_response, "TotalMatches" );
> +        psz_NumberReturned = xml_getChildElementValue( (IXML_Element*)p_response, "NumberReturned" );
> 
> -    ixmlDocument_free( p_response );
> +        StartingIndex = std::to_string(  std::stol(psz_NumberReturned) + std::stol(StartingIndex) );
> +        l_reqCount = std::stol(psz_TotalMatches) - std::stol(StartingIndex) ;
> +        RequestedCount = std::to_string(l_reqCount);
> 
> -    if ( !p_result )
> -    {
> -        msg_Err( m_access, "browse() response parsing failed" );
> -        return false;
> -    }
> +        IXML_Document* p_result = parseBrowseResult( p_response );
> +
> +        ixmlDocument_free( p_response );
> +
> +        if ( !p_result )
> +        {
> +            msg_Err( m_access, "browse() response parsing failed" );
> +            return false;
> +        }
> 
> -    if( var_InheritInteger(m_access, "verbose") >= 4 )
> +#ifndef NDEBUG
>         msg_Dbg( m_access, "Got DIDL document: %s", ixmlPrintDocument( p_result ) );
> +#endif
> 
> -    IXML_NodeList* containerNodeList =
> -                ixmlDocument_getElementsByTagName( p_result, "container" );
> +        IXML_NodeList* containerNodeList =
> +        ixmlDocument_getElementsByTagName( p_result, "container" );
> 
> -    if ( containerNodeList )
> -    {
> -        for ( unsigned int i = 0; i < ixmlNodeList_length( containerNodeList ); i++ )
> -            addContainer( (IXML_Element*)ixmlNodeList_item( containerNodeList, i ) );
> -        ixmlNodeList_free( containerNodeList );
> -    }
> +        if ( containerNodeList )
> +        {
> +            for ( unsigned int i = 0; i < ixmlNodeList_length( containerNodeList ); i++)
> +                addContainer( (IXML_Element*)ixmlNodeList_item( containerNodeList, i ) );
> +            ixmlNodeList_free( containerNodeList );
> +        }
> 
> -    IXML_NodeList* itemNodeList = ixmlDocument_getElementsByTagName( p_result,
> -                                                                     "item" );
> -    if ( itemNodeList )
> -    {
> -        for ( unsigned int i = 0; i < ixmlNodeList_length( itemNodeList ); i++ )
> -            addItem( (IXML_Element*)ixmlNodeList_item( itemNodeList, i ) );
> -        ixmlNodeList_free( itemNodeList );
> -    }
> +        IXML_NodeList* itemNodeList = ixmlDocument_getElementsByTagName( p_result,
> +                                                                        "item" );
> +        if ( itemNodeList )
> +        {
> +            for ( unsigned int i = 0; i < ixmlNodeList_length( itemNodeList ); i++)
> +                addItem( (IXML_Element*)ixmlNodeList_item( itemNodeList, i ) );
> +            ixmlNodeList_free( itemNodeList );
> +        }
> 
> -    ixmlDocument_free( p_result );
> +        ixmlDocument_free( p_result );
> +    }
> +    while( l_reqCount );
>     return true;
> }
> 
> diff --git a/modules/services_discovery/upnp.hpp b/modules/services_discovery/upnp.hpp
> index cf291395cb..ae5894bca5 100644
> --- a/modules/services_discovery/upnp.hpp
> +++ b/modules/services_discovery/upnp.hpp
> @@ -112,7 +112,7 @@ private:
>     bool addContainer( IXML_Element* containerElement );
>     bool addItem( IXML_Element* itemElement );
> 
> -    IXML_Document* _browseAction(const char*, const char*,
> +    IXML_Document* _browseAction(const char*, const char*, const char*,
>             const char*, const char*, const char* );
>     static int sendActionCb( Upnp_EventType, UpnpEventPtr, void *);
> 
> 
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