upnp-cmd and apostrophes

[Darren]

I have some automation that uses upnp-cmd to start video file playback, and all is working fine except for files that have apostrophes in their names.

I am using the command with both arguments "upnp-cmd SetAVTransportURI <URI> <URIMetaData>" because I found that specifying only the URI does not set the current file name/title on the wdtv playback gui, and it uses the name of the last file played instead. So I'm also including the URIMetaData in its <DIDL-Lite> tag to set the file's title to show correctly on the gui.

I can't find a way to properly escape the file URI inside the URIMetaData. It appears to require the file URI to be include in the child <res> tag, and I think this is where I need to escape that apostrophe. I've tried the typical methods, like &apos; or \' or %27 but then the wdtv either leaves those entities untouched or double-escapes them.

I looked inside the upnp-cmd php file and its passing the URIMetaData through htmlentities(), but that function doesn't do anything to apostrophes.

If I manually play the file using the regular wdtv remote, and then run "upnp-cmd GetMediaInfo" via telnet, it shows the apostrophe escaped as %27. But the question is, how do I format the URIMetaData so that the wdtv receives the apostrophe in the format it needs?

Thanks

Here's an example of the URIMetaData I'm testing with:

Code: Select all

$meta = '<DIDL-Lite xmlns="urn:schemas-upnp-org:metadata-1-0/DIDL-Lite/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:upnp="urn:schemas-upnp-org:metadata-1-0/upnp/"><item><dc:title>' . 'Test' . '</dc:title><upnp:class>object.item.videoItem</upnp:class><res  protocolInfo="file-get:*:video/x-matroska::DLNA.ORG_OP=01;DLNA.ORG_CI=0;DLNA.ORG_FLAGS=00000000001000000000000000000000">' . 'file:///tmp/media/usb/USB1/A02CCBB62CCF93BE/Video/A Midsummer\'s Nice Dreams.mkv' . '</res></item></DIDL-Lite>';


[recliq]

Code: Select all

' => '\''

[Darren]

Thanks, that's the first thing I had tried, and is in the example I included :-)

I guess using

Code: Select all

'\''

is equivalent to using

Code: Select all

"'"

and either one of those methods is sending the apostrophe as a "raw" character, which the wdtv apparently will not process. If I send such an unencoded apostrophe in the <res> tag then the wdtv does not process the SetAVTransportURI command at all. It just ignores the command.

Edit:
I just did some more testing:
In the <title> tag it does not like the escaped (\') apostrophe, but encoding it as &apos; works fine.
However, using either method in the <res> tag fails. And when I use &apos; in this tag then it gets converted to %26apos%3B

Btw, when I google for "xml apostrophe" it looks like plenty of people have (sometimes platform-specific) issues with properly encoding this character for xml consumption. It depends on the parsing engine.

[RMerlin]

Btw, when I google for "xml apostrophe" it looks like plenty of people have (sometimes platform-specific) issues with properly encoding this character for xml consumption. It depends on the parsing engine.

Yay for non-standard standards! Almost makes you think it was designed by Microsoft or something.

[recliq]

Thanks, that's the first thing I had tried, and is in the example I included

I guess using

Code: Select all

'\''

is equivalent to using

Code: Select all

"'"

and either one of those methods is sending the apostrophe as a "raw" character, which the wdtv apparently will not process. If I send such an unencoded apostrophe in the <res> tag then the wdtv does not process the SetAVTransportURI command at all. It just ignores the command.

Edit:
I just did some more testing:
In the <title> tag it does not like the escaped (\') apostrophe, but encoding it as &apos; works fine.
However, using either method in the <res> tag fails. And when I use &apos; in this tag then it gets converted to %26apos%3B

Btw, when I google for "xml apostrophe" it looks like plenty of people have (sometimes platform-specific) issues with properly encoding this character for xml consumption. It depends on the parsing engine.

Well

Code: Select all

'\''

obviously is different from

Code: Select all

"'"

and your example does not include my proposal.
try this:

Code: Select all

$meta = '<DIDL-Lite xmlns="urn:schemas-upnp-org:metadata-1-0/DIDL-Lite/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:upnp="urn:schemas-upnp-org:metadata-1-0/upnp/"><item><dc:title>A Midsummer'\''s Nice Dreams</dc:title><upnp:class>object.item.videoItem</upnp:class><res  protocolInfo="file-get:*:video/x-matroska::DLNA.ORG_OP=01;DLNA.ORG_CI=0;DLNA.ORG_FLAGS=00000000001000000000000000000000">file:///tmp/media/usb/USB1/A02CCBB62CCF93BE/Video/A Midsummer'\''s Nice Dreams.mkv</res></item></DIDL-Lite>';


[zoster]

How/where do you pass the $meta variable?
This works for aaa'bbb.avi :

Code: Select all

function _actionSetMeta($prmURI = '') {
    $meta  = '<DIDL-Lite xmlns="urn:schemas-upnp-org:metadata-1-0/DIDL-Lite/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:upnp="urn:schemas-upnp-org:metadata-1-0/upnp/">';
    $meta .= '<item id="dummy1" parentID="dummy0" restricted="0">';
    $meta .= '<dc:title>aaa\'bbb</dc:title>';
    $meta .= '<dc:date></dc:date>';
    $meta .= '<upnp:class>object.item.videoItem</upnp:class>';
    $meta .= '<dc:creator></dc:creator>';
    $meta .= '<upnp:genre></upnp:genre>';
    $meta .= '<upnp:album></upnp:album>';
    $meta .= '<res protocolInfo="*:*:video/x-msvideo:*"  resolution="512X384"  colorDepth="0" >file:///tmp/aaa\'bbb.avi</res>';
    $meta .= '</item>';
    $meta .= '</DIDL-Lite>';
   
    $action = 'SetAVTransportURI';
    $args   = '<InstanceID>0</InstanceID>' . "\r\n";
    $args  .= '<CurrentURI>' . $prmURI . '</CurrentURI>' . "\r\n";
    $args  .= '<CurrentURIMetaData>' . htmlentities($meta) . '</CurrentURIMetaData>' . "\r\n";
    $result = _sendUPnPCommand($action, $args, 'AVTransport');
}


[PaulF]

I am on vacation, posting on my phone so I can't test.
Try: $meta = htmlentities(xxx);

[Darren]

...your example does not include my proposal.
try this:

Code: Select all

$meta = '<DIDL-Lite xmlns="urn:schemas-upnp-org:metadata-1-0/DIDL-Lite/" xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:upnp="urn:schemas-upnp-org:metadata-1-0/upnp/"><item><dc:title>A Midsummer'\''s Nice Dreams</dc:title><upnp:class>object.item.videoItem</upnp:class><res  protocolInfo="file-get:*:video/x-matroska::DLNA.ORG_OP=01;DLNA.ORG_CI=0;DLNA.ORG_FLAGS=00000000001000000000000000000000">file:///tmp/media/usb/USB1/A02CCBB62CCF93BE/Video/A Midsummer'\''s Nice Dreams.mkv</res></item></DIDL-Lite>';


Sorry, I didn't understand what you meant when you suggested (' => '\''). Your proposal does not close the string properly. If I greatly simplify the example meta string, you'd get something like this:

Code: Select all

$meta = '<tag>Title'\''s Text</tag>';

which could be interpreted as

Code: Select all

$meta = '<tag>Title'
\'
's Text</tag>';

Its hard to say how it would be interpreted, but there should be only one string.

[Darren]

How/where do you pass the $meta variable?
This works for aaa'bbb.avi :

You're right! If I embed my strings directly inside the upnp-cmd php file then it works! So now I need to track down why the values are not getting there...

I'm passing the variables on the command for upnp-cmd SetAVTransportURI URI URIMeta

[Darren]

I am on vacation, posting on my phone so I can't test.
Try: $meta = htmlentities(xxx);

Thanks, I tried that too, although the SetAVTransportURI command already uses this for the meta value. It looks like htmlentities() only encodes for amp, quot, lt, gt. It does not do anything with apostrophes.