<div dir="ltr">Yep, i had a lot of fun learning mime database details.<div>This is a real contest to the programmer, even to qualified one. And i'm not belong to those group :)</div><div>So, i will try to eviscerate the Windows registry to find MIME info storage. And how are Windows users lives without such MIME database... i don't understand this. Just extension gives too limited information to software.</div> </div><div class="gmail_extra"> <div class="gmail_quote">2013/12/16 Jerome Leclanche <<a href="mailto:adys.wh@gmail.com" target="_blank">adys.wh@gmail.com</a>> <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"> Mime types are interesting to know about, so if you want to learn more about them why not. A windows-compatible lib would be interesting. But all in all, Qt already has a mime type solution. J. Leclanche <div class="HOEnZb"><div class="h5"> On Mon, Dec 16, 2013 at 9:55 AM, Alexander Kamyshnikov <<a href="mailto:axill777@gmail.com">axill777@gmail.com</a>> wrote: > Oh thanks, Kevin! This library is exactly i need for. > However, yet-another-implementation-of MIME loader might be useful for > somebody, or i'm just wasted my time? :) > This was funny and interesting quest. > > > 2013/12/16 Kevin Krammer <<a href="mailto:krammer@kde.org">krammer@kde.org</a>> >> >> On Monday, 2013-12-16, 12:45:47, Alexander Kamyshnikov wrote: >> > I'm confused a bit. >> > So, you want to say that QMimeDatabase from Qt5 can be separately used >> > in >> > Qt4? >> > I.e. i can just include this code in mine. >> >> Not the Qt5 based code obviously. But Jerome said that there is a Qt4 port >> of >> the Qt5 code. >> >> I guess he is referring to >> <a href="https://github.com/pasnox/mimetypes-qt4" target="_blank">https://github.com/pasnox/mimetypes-qt4</a> >> >> Cheers, >> Kevin >> >> > Also, i'm trying to google "qmimedatabase qt4", but find nothing >> > appropriate. >> > A more concrete search direction will be welcome. >> > P.S. Sorry, if i don't understand simple things. My english is not >> > perfect >> > yet. >> > >> > >> > 2013/12/16 Kevin Krammer <<a href="mailto:krammer@kde.org">krammer@kde.org</a>> >> > >> > > On Monday, 2013-12-16, 11:41:34, Alexander Kamyshnikov wrote: >> > > > Hi Kevin. I'm glad to see KDE developer here because i'm KDE fan for >> > > > many >> > > > years :) >> > > > But this KDE MIME-support code hardly depend from other KDE stuff, >> > > > isn't >> > > >> > > it? >> > > >> > > > I need "pure" Qt code - this is our software client requirement :/ >> > > > So >> > > > i'm >> > > > wrote CMimeDatabase class. And just want to make it fully compliant >> > > > with >> > > > freedesktop standart. >> > > >> > > Just wanted to point out that the Qt5 implementation was contributed >> > > by >> > > KDE >> > > developers, so additional to the Qt4 port of that code there is also >> > > "the >> > > original" Qt4 code available. >> > > >> > > But of course if you need a pure C++ implementation without Qt then >> > > writing a >> > > new one is your only choice. >> > > >> > > Cheers, >> > > Kevin >> > > >> > > > (see >> > > >> > > >> > > <a href="http://api.kde.org/4.0-api/kdelibs-apidocs/kdecore/html/kmimetype_8h_sourc" target="_blank">http://api.kde.org/4.0-api/kdelibs-apidocs/kdecore/html/kmimetype_8h_sourc</a> >> > > e >> > > . >> > > >> > > > html - >> > > > KUrl, KServiceType etc.) >> > > > >> > > > >> > > > 2013/12/14 Kevin Krammer <<a href="mailto:krammer@kde.org">krammer@kde.org</a>> >> > > > >> > > > > On Friday, 2013-12-13, 20:11:34, Jerome Leclanche wrote: >> > > > > > There is a Qt 4 port of this. >> > > > > >> > > > > And there should also be the original Qt4 based code in the >> > > > > kdelibs >> > > > > repository. >> > > > > >> > > > > Cheers, >> > > > > Kevin >> > > > > >> > > > > > As for windows support... I've been down that road, trying to >> > > > > > provide >> > > > > > it. Windows' feature set doesn't even sort of come close; it >> > > > > > only >> > > > > > provides real mime types for a limited set of registered >> > > > > > extensions, >> > > > > > and it doesn't provide any of the very useful features such as >> > > > > > subclassing, etc. In the end, I gave up and am only providing >> > > > > > xdg-based mime types. I think Qt made an excellent choice in >> > > >> > > providing >> > > >> > > > > > the xdg database itself. But if you choose against that, good >> > > > > > luck. >> > > > > > >> > > > > > Anyway you can have a look at my python-based mimetype lib. >> > > > > > Magic >> > > > > > matches are implemented on line 192 onwards. >> > > > > > >> > > > > > <a href="https://github.com/Adys/python-xdg/blob/master/xdg/mime.py" target="_blank">https://github.com/Adys/python-xdg/blob/master/xdg/mime.py</a> >> > > > > > >> > > > > > J. Leclanche >> > > > > > >> > > > > > >> > > > > > On Fri, Dec 13, 2013 at 7:56 PM, Alexander Kamyshnikov >> > > > > > >> > > > > > <<a href="mailto:axill777@gmail.com">axill777@gmail.com</a>> wrote: >> > > > > > > Yes, i had. But i decided to write my own implementation >> > > > > > > because: >> > > > > > > a) my project is forced to use Qt4 only (clients have very old >> > > > > >> > > > > versions of >> > > > > >> > > > > > > modified Red Hat with XDG_DATA_DIRS undefined); >> > > > > > > b) Windows support (through reading registry HKCR/.ext keys) >> > > > > > > is >> > > > > >> > > > > required; >> > > > > >> > > > > > > c) I'm very curious :) >> > > > > > > >> > > > > > > You think i'm should look deeply at the qmimedatabase.cpp >> > > > > > > however? >> > > > > > > >> > > > > > > >> > > > > > > 2013/12/13 Jerome Leclanche <<a href="mailto:adys.wh@gmail.com">adys.wh@gmail.com</a>> >> > > > > > > >> > > > > > >> Have you had a look at the Qt 5 mimetype module? >> > > > > > >> >> > > > > > >> <a href="http://qt-project.org/doc/qt-5.0/qtcore/qmimedatabase.html" target="_blank">http://qt-project.org/doc/qt-5.0/qtcore/qmimedatabase.html</a> >> > > > > > >> J. Leclanche >> > > > > > >> >> > > > > > >> >> > > > > > >> On Fri, Dec 13, 2013 at 7:35 PM, Alexander Kamyshnikov >> > > > > > >> >> > > > > > >> <<a href="mailto:axill777@gmail.com">axill777@gmail.com</a>> wrote: >> > > > > > >> > Hi all! >> > > > > > >> > I'm developing the implementation of MIME database in >> > > > > > >> > C++/Qt >> > > > > > >> > for >> > > > > > >> > one >> > > > > > >> > commercial program (requirement managment tool, if one will >> > > > > > >> > be >> > > > > > >> > interested). >> > > > > > >> > So my question is: the format of magic values to compare >> > > > > > >> > file >> > > > > > >> > header >> > > > > > >> > data >> > > > > > >> > with is not specified exactly in the spec. I mean the >> > > > > >> > > > > magic/match/value >> > > > > >> > > > > > >> > attribute. >> > > > > > >> > What exactly mean those magic strings from >> > > > > > >> > /usr/share/mime/packages/freedesktop.org.xml from my >> > > > > > >> > Kubuntu? >> > > > > > >> > 1) "\1\9" >> > > > > > >> > 2) "\376\067\0\043" >> > > > > > >> > 3) "\x8AMNG\x0D\x0A\x1A\x0A" >> > > > > > >> > Second is looks like octal number in C notation, third - >> > > > > >> > > > > hexadecimal, >> > > > > >> > > > > > >> > but >> > > > > > >> > about first i'm not sure. It is just "usual" decimal value? >> > > > > > >> > What format exactly should use magic values? >> > > > > > >> > Thanks for your help. WBR, Alexander >> > > >> > > > > > >> > P.S. Spec i'm using living here: >> > > >> > > <a href="http://standards.freedesktop.org/shared-mime-info-spec/shared-mime-info" target="_blank">http://standards.freedesktop.org/shared-mime-info-spec/shared-mime-info</a> >> > > >> > > > > > >> > -spec-latest.html#id2661973 P.S. <match> items can be >> > > > > > >> > nested. >> > > >> > > But i >> > > >> > > > > > >> > can't find yet the clear way to implement their storage >> > > > > > >> > programmatically. Some kind of tree, or reverse polish >> > > > > > >> > notation >> > > > > >> > > > > should >> > > > > >> > > > > > >> > be used here? nevermind >> > > > > > >> > >> > > > > > >> > _______________________________________________ >> > > > > > >> > xdg mailing list >> > > > > > >> > <a href="mailto:xdg@lists.freedesktop.org">xdg@lists.freedesktop.org</a> >> > > > > > >> > <a href="http://lists.freedesktop.org/mailman/listinfo/xdg" target="_blank">http://lists.freedesktop.org/mailman/listinfo/xdg</a> >> > > > > > >> > > > > > _______________________________________________ >> > > > > > xdg mailing list >> > > > > > <a href="mailto:xdg@lists.freedesktop.org">xdg@lists.freedesktop.org</a> >> > > > > > <a href="http://lists.freedesktop.org/mailman/listinfo/xdg" target="_blank">http://lists.freedesktop.org/mailman/listinfo/xdg</a> >> > > > > >> > > > > -- >> > > > > Kevin Krammer, KDE developer, xdg-utils developer >> > > > > KDE user support, developer mentoring >> > > > > >> > > > > _______________________________________________ >> > > > > xdg mailing list >> > > > > <a href="mailto:xdg@lists.freedesktop.org">xdg@lists.freedesktop.org</a> >> > > > > <a href="http://lists.freedesktop.org/mailman/listinfo/xdg" target="_blank">http://lists.freedesktop.org/mailman/listinfo/xdg</a> >> > > >> > > -- >> > > Kevin Krammer, KDE developer, xdg-utils developer >> > > KDE user support, developer mentoring >> > > >> > > _______________________________________________ >> > > xdg mailing list >> > > <a href="mailto:xdg@lists.freedesktop.org">xdg@lists.freedesktop.org</a> >> > > <a href="http://lists.freedesktop.org/mailman/listinfo/xdg" target="_blank">http://lists.freedesktop.org/mailman/listinfo/xdg</a> >> -- >> Kevin Krammer, KDE developer, xdg-utils developer >> KDE user support, developer mentoring >> >> _______________________________________________ >> xdg mailing list >> <a href="mailto:xdg@lists.freedesktop.org">xdg@lists.freedesktop.org</a> >> <a href="http://lists.freedesktop.org/mailman/listinfo/xdg" target="_blank">http://lists.freedesktop.org/mailman/listinfo/xdg</a> >> > > > _______________________________________________ > xdg mailing list > <a href="mailto:xdg@lists.freedesktop.org">xdg@lists.freedesktop.org</a> > <a href="http://lists.freedesktop.org/mailman/listinfo/xdg" target="_blank">http://lists.freedesktop.org/mailman/listinfo/xdg</a> > </div></div></blockquote></div> </div>