| Why NowSMS adds .dm to FL content? |  Search
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NowSMS Support Forums ⬆ NowSMS Support - MMS & Advanced Issues ⬆ Archive through July 28, 2006 ⬆ |
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| Author | Message | |||
| Alex New member Username: Morm Post Number: 1 Registered: 05-2006 |
Moving my question here from http://support.nowsms.com/discus/messages/12/15453.html If compose an MMS with any content and use Forward Lock option from NowSMS web interface (I use 2006 edition) A content file received with '.dm' added to its name (e.g. 'pic.jpg' file used and 'pic.jpg.dm' received). As far as FL mechanism does not change the file and specified by "Content-type: application/vnd.oma.drm.message" option, file should not be changed. Note: I downloaded file 'pic.jpg.dm' from mobile FS, compared it to initial 'pic.jpg' and found it binary identical, so file is not changed indeed - why extension added? Note2: Some time ago I tried previous version of NowSMS without CD/SD mechanisms and only FL available - it didn't add this ext. | |||
| Bryce Norwood - NowSMS Support Board Administrator Username: Bryce Post Number: 5959 Registered: 10-2002 |
Hi Alex, I thought we always added this extension. "pic.jpg.dm" is the content with the forward lock wrapper. "pic.jpg" is the content without the wrapper. I assume this is causing a problem for you, maybe you could provide some detail on that. -bn | |||
| Alex New member Username: Morm Post Number: 2 Registered: 05-2006 |
Hi Bryce, It's unclear why files pic.jpg and pic.jpg.dm sent by NowSMS are REALLY (checked binary) same. I tried to make a FL protected file using 3 tools: Motorola DRM Tool (2.70) Nokia Content Publishing Toolkit 2.0 and Sony Ericsson DRM Packager and found that those files different added header: --mime_content_boundary Content-Type: image/gif Content-Transfer-Encoding: binary and some more stuff (different for each DRM tool). In other point of view (meaning current NowSMS processing) - FL flag is a part of MMS message, when file is saved to file system - this flag is set on file properties. Also known that one MMS message can contain only one forward-locked content. I'm not an expert, but if take into account that FL flag is kept by phone's file system - not clear why .dm extension is necessary. | |||
| Alex New member Username: Morm Post Number: 3 Registered: 05-2006 |
yeah, thanks for your response. happy to get your answers to my (probably stupid) questions. sorry Alex | |||
