Re: [Sugar-devel] activities using zip files (was: Re: [IAEP] Journal criticism)
On Thu, May 28, 2009 at 22:53, Sascha Silbe sascha-ml-ui-sugar-de...@silbe.org wrote: On Wed, May 27, 2009 at 12:34:03PM -0500, James Simmons wrote: 5). When several Activities support the same MIME type (Zip files are BOUND to be popular) then there needs to be a way of specifying that a particular Journal entry should be resumed by a particular Activity by default. Actually zip is just a container format and should be handled as such (if possible at all). I.e. zips created by activities should use a MIME type identifying the _contents_, not the generic application/zip. File formats can be - and often are - nested: OpenOffice documents are xml-inside-zip, some other application might be using xml-inside-tar-inside-gz and source tarballs are (C+Makefile+...)-inside-tar-inside-bz2. Unfortunately, most software using MIME types has very little support for such complexity (only gzip/bzip/compress as encodings). While it would be nice for the Journal to handle the full (i.e. nested) type, we'll need to cope with the lack of support in other software (like web servers) for quite some time. The journal and browse are able to sniff the types of these formats, so activity authors are encourage to use this scheme and ship a mimetypes.ml file inside their bundles. Regards, Tomeu CU Sascha -- http://sascha.silbe.org/ http://www.infra-silbe.de/ -BEGIN PGP SIGNATURE- Version: GnuPG v1.4.9 (GNU/Linux) iQEcBAEBAgAGBQJKHvm9AAoJELpz82VMF3Da2m0IAIys+LuTpmJ1V9HFOHbW9PuU B6DpPj2i7SFkcdJ+8Rn4M/aSrslvV1f+3vFXeHhiFzYXFteWd2Vmc7zZCKRYLvxo 6IaFqIGWIFTViLbq1rJNtHu7ZBm5zS5bzRTRP2PKZ9rHCdfLzDM3lfLdKkAeOHX+ u+MzC+YLAPGp7Va4o9jov1qXJm1QH0dxzt80z2r5cI9ihoXuK90B9TmckGXU+MxO kbbdFSW2RVogix7btAZZQyQmx0rbNgqVTzQW8nkRLAIheJ2yBGGGWxs9YdzNmPUv JDeg5lTuoCGfW1kgzIPBRZNdsXSntaen1gCvwjFZCrwr5BBXr37y83KVmq5LBlk= =c5vn -END PGP SIGNATURE- ___ Sugar-devel mailing list Sugar-devel@lists.sugarlabs.org http://lists.sugarlabs.org/listinfo/sugar-devel ___ Sugar-devel mailing list Sugar-devel@lists.sugarlabs.org http://lists.sugarlabs.org/listinfo/sugar-devel
Re: [Sugar-devel] activities using zip files (was: Re: [IAEP] Journal criticism)
On Fri, May 29, 2009 at 13:50, Walter Bender walter.ben...@gmail.com wrote: On Fri, May 29, 2009 at 7:32 AM, Tomeu Vizoso to...@sugarlabs.org wrote: [snip] The journal and browse are able to sniff the types of these formats, so activity authors are encourage to use this scheme and ship a mimetypes.ml file inside their bundles. Is there an example of what this should look like and where in the bundle it should go? The closest I was able to find I found this example in ClassroomPresenter. ClassroomPresenter.activity/activity/mimetypes.xml ?xml version=1.0 encoding=UTF-8? mime-info xmlns=http://www.freedesktop.org/standards/shared-mime-info; mime-type type=application/x-classroompresenter commentClassroom Presenter Slide Deck/comment glob pattern=*.cpxo/ /mime-type /mime-info From /usr/share/mime/packages/freedesktop.org.xml : mime-type type=application/vnd.oasis.opendocument.text commentODT document/comment comment xml:lang=b...@latinDakument ODT/comment ... comment xml:lang=viTài liệu ODT/comment acronymODT/acronym expanded-acronymOpenDocument Text/expanded-acronym sub-class-of type=application/zip/ generic-icon name=x-office-document/ magic priority=50 match value=PK\003\004 type=string offset=0 match value=mimetype type=string offset=30 match value=application/vnd.oasis.opendocument.text type=string offset=38/ /match /match /magic glob pattern=*.odt/ /mime-type This works for .odt files because at the beginning of the zip file there's an uncompressed file named mimetype that contains the mime type. That's why at the offset 38 we should find the string application/vnd.oasis.opendocument.text. Some info here: http://books.evc-cit.info/odbook/ch01.html Regards, Tomeu -walter -- Walter Bender Sugar Labs http://www.sugarlabs.org ___ Sugar-devel mailing list Sugar-devel@lists.sugarlabs.org http://lists.sugarlabs.org/listinfo/sugar-devel
Re: [Sugar-devel] activities using zip files
On Fri, May 29, 2009 at 00:24, James Simmons jim.simm...@walgreens.com wrote: Sascha, If the Activity creates a Zip file then the Journal automatically resumes it in that Activity. Making Activities use a special MIME type when creating a Journal entry doesn't give me anything I don't have already. Well, if the file has its own file extension, then when you move files across computers it will be still resumable with your activity (and will use its icon). Not critically important but may be handy in some cases. Where we have problems is in downloading Zip files from Gutenberg and other places that don't do anything special with the MIME type. For instance, Gutenberg has zipped up text files as well as zipped up websites (multiple html pages plus illustrations). Somebody mentioned that Browse will eventually be able to save web pages with illustrations, etc. as zipfiles for offline reading. If Browse could handle that, you'd also want it to be able to open these Gutenberg zip files if they are saved in the Journal, and it would be nice to do it with one click. Yeah, Browse could grow some generic support for zip files, but anyway the worst problem is that people are using zip files as a generic container but without signaling its contents with an specific file extension :/ The format I use for View Slides is sometimes called CBZ. It's just a Zip file containing images with a .cbz suffix rather than .zip. The GNOME desktop recognizes this file type and displays the first image in the file as the file's icon. I don't think there is a MIME type for that though. View Slides could register a mime type for that extension. This way, when someone downloads or copies a file ending in .cbz, ir would open with VS and would use its icon. More info: http://wiki.sugarlabs.org/go/Development_Team/Almanac/Activity_Bundles#Bundle_structure Regards, Tomeu James Simmons Sascha Silbe wrote: On Wed, May 27, 2009 at 12:34:03PM -0500, James Simmons wrote: 5). When several Activities support the same MIME type (Zip files are BOUND to be popular) then there needs to be a way of specifying that a particular Journal entry should be resumed by a particular Activity by default. Actually zip is just a container format and should be handled as such (if possible at all). I.e. zips created by activities should use a MIME type identifying the _contents_, not the generic application/zip. File formats can be - and often are - nested: OpenOffice documents are xml-inside-zip, some other application might be using xml-inside-tar-inside-gz and source tarballs are (C+Makefile+...)-inside-tar-inside-bz2. Unfortunately, most software using MIME types has very little support for such complexity (only gzip/bzip/compress as encodings). While it would be nice for the Journal to handle the full (i.e. nested) type, we'll need to cope with the lack of support in other software (like web servers) for quite some time. CU Sascha ___ Sugar-devel mailing list Sugar-devel@lists.sugarlabs.org http://lists.sugarlabs.org/listinfo/sugar-devel ___ Sugar-devel mailing list Sugar-devel@lists.sugarlabs.org http://lists.sugarlabs.org/listinfo/sugar-devel
Re: [Sugar-devel] activities using zip files
Sascha, If the Activity creates a Zip file then the Journal automatically resumes it in that Activity. Making Activities use a special MIME type when creating a Journal entry doesn't give me anything I don't have already. Where we have problems is in downloading Zip files from Gutenberg and other places that don't do anything special with the MIME type. For instance, Gutenberg has zipped up text files as well as zipped up websites (multiple html pages plus illustrations). Somebody mentioned that Browse will eventually be able to save web pages with illustrations, etc. as zipfiles for offline reading. If Browse could handle that, you'd also want it to be able to open these Gutenberg zip files if they are saved in the Journal, and it would be nice to do it with one click. The format I use for View Slides is sometimes called CBZ. It's just a Zip file containing images with a .cbz suffix rather than .zip. The GNOME desktop recognizes this file type and displays the first image in the file as the file's icon. I don't think there is a MIME type for that though. James Simmons Sascha Silbe wrote: On Wed, May 27, 2009 at 12:34:03PM -0500, James Simmons wrote: 5). When several Activities support the same MIME type (Zip files are BOUND to be popular) then there needs to be a way of specifying that a particular Journal entry should be resumed by a particular Activity by default. Actually zip is just a container format and should be handled as such (if possible at all). I.e. zips created by activities should use a MIME type identifying the _contents_, not the generic application/zip. File formats can be - and often are - nested: OpenOffice documents are xml-inside-zip, some other application might be using xml-inside-tar-inside-gz and source tarballs are (C+Makefile+...)-inside-tar-inside-bz2. Unfortunately, most software using MIME types has very little support for such complexity (only gzip/bzip/compress as encodings). While it would be nice for the Journal to handle the full (i.e. nested) type, we'll need to cope with the lack of support in other software (like web servers) for quite some time. CU Sascha ___ Sugar-devel mailing list Sugar-devel@lists.sugarlabs.org http://lists.sugarlabs.org/listinfo/sugar-devel
Re: [Sugar-devel] activities using zip files
On Fri, May 29, 2009 at 3:54 AM, James Simmons jim.simm...@walgreens.com wrote: Sascha, If the Activity creates a Zip file then the Journal automatically resumes it in that Activity. Making Activities use a special MIME type when creating a Journal entry doesn't give me anything I don't have already. Where we have problems is in downloading Zip files from Gutenberg and other places that don't do anything special with the MIME type. For instance, Gutenberg has zipped up text files as well as zipped up websites (multiple html pages plus illustrations). Somebody mentioned that Browse will eventually be able to save web pages with illustrations, etc. as zipfiles for offline reading. If Browse could handle that, you'd also want it to be able to open these Gutenberg zip files if they are saved in the Journal, and it would be nice to do it with one click. The format I use for View Slides is sometimes called CBZ. It's just a Zip file containing images with a .cbz suffix rather than .zip. The GNOME desktop recognizes this file type and displays the first image in the file as the file's icon. I don't think there is a MIME type for that though. The version of Read that is associated with OLPC 8.2.1 release (as well as newer versions of Read) should be able to handle CBZ files. application/x-cbz is what I used in the activity.info file. Thanks, Sayamindu -- Sayamindu Dasgupta [http://sayamindu.randomink.org/ramblings] ___ Sugar-devel mailing list Sugar-devel@lists.sugarlabs.org http://lists.sugarlabs.org/listinfo/sugar-devel
