filename = form_result['filename'] or 'gistfile1.txt'

                filename: {

                    'lexer': form_result['mimetype']  # None is autodetect

        mimetype = v.UnicodeString(required=False, if_missing=None)

MIME_TO_EXT = {

    'application/javascript': ['*.js'],

    'text/javascript': ['*.js'],

    'application/json': ['*.json'],

    'application/postscript': ['*.ps', '*.eps'],

    'application/x-actionscript': ['*.as'],

    'application/x-actionscript3': ['*.as'],

    'application/x-awk': ['*.awk'],

    'application/x-befunge': ['*.befunge'],

    'application/x-brainfuck': ['*.bf', '*.b'],

    'application/x-cheetah': ['*.tmpl', '*.spt'],

    'application/x-coldfusion': ['*.cfm', '*.cfml', '*.cfc'],

    'application/x-csh': ['*.tcsh', '*.csh'],

    'application/x-dos-batch': ['*.bat', '*.cmd'],

    'application/x-ecl': ['*.ecl'],

    'application/x-evoque': ['*.evoque'],

    'application/x-fantom': ['*.fan'],

    'application/x-genshi': ['*.kid'],

    'application/x-gettext': ['*.pot', '*.po'],

    'application/x-jsp': ['*.jsp'],

    'application/x-mako': ['*.mao'],

    'application/x-mason': ['*.m', '*.mhtml', '*.mc', '*.mi', 'autohandler', 'dhandler'],

    'application/x-myghty': ['*.myt', 'autodelegate'],

    'application/x-php': ['*.phtml'],

    'application/x-pypylog': ['*.pypylog'],

    'application/x-qml': ['*.qml'],

    'application/x-sh': ['*.sh', '*.ksh', '*.bash', '*.ebuild', '*.eclass', '.bashrc', 'bashrc', '.bash_*', 'bash_*'],

    'application/x-sh-session': ['*.shell-session'],

    'application/x-shell-session': ['*.sh-session'],

    'application/x-smarty': ['*.tpl'],

    'application/x-ssp': ['*.ssp'],

    'application/x-troff': ['*.[1234567]', '*.man'],

    'application/x-urbiscript': ['*.u'],

    'application/xml+evoque': ['*.xml'],

    'application/xml-dtd': ['*.dtd'],

    'application/xsl+xml': ['*.xsl', '*.xslt', '*.xpl'],

    'text/S-plus': ['*.S', '*.R', '.Rhistory', '.Rprofile'],

    'text/coffeescript': ['*.coffee'],

    'text/css': ['*.css'],

    'text/haxe': ['*.hx'],

    'text/html': ['*.html', '*.htm', '*.xhtml', '*.xslt'],

    'text/html+evoque': ['*.html'],

    'text/html+ruby': ['*.rhtml'],

    'text/idl': ['*.pro'],

    'text/livescript': ['*.ls'],

    'text/matlab': ['*.m'],

    'text/octave': ['*.m'],

    'text/plain': ['*.txt'],

    'text/scilab': ['*.sci', '*.sce', '*.tst'],

    'text/smali': ['*.smali'],

    'text/x-abap': ['*.abap'],

    'text/x-ada': ['*.adb', '*.ads', '*.ada'],

    'text/x-apacheconf': ['.htaccess', 'apache.conf', 'apache2.conf'],

    'text/x-aspectj': ['*.aj'],

    'text/x-asymptote': ['*.asy'],

    'text/x-autohotkey': ['*.ahk', '*.ahkl'],

    'text/x-autoit': ['*.au3'],

    'text/x-bmx': ['*.bmx'],

    'text/x-boo': ['*.boo'],

    'text/x-c++hdr': ['*.cpp', '*.hpp', '*.c++', '*.h++', '*.cc', '*.hh', '*.cxx', '*.hxx', '*.C', '*.H', '*.cp','*.CPP'],

    'text/x-c-objdump': ['*.c-objdump'],

    'text/x-ceylon': ['*.ceylon'],

    'text/x-chdr': ['*.c', '*.h', '*.idc'],

    'text/x-clojure': ['*.clj'],

    'text/x-cmake': ['*.cmake', 'CMakeLists.txt'],

    'text/x-cobol': ['*.cob', '*.COB', '*.cpy', '*.CPY'],

    'text/x-common-lisp': ['*.cl', '*.lisp', '*.el'],

    'text/x-coq': ['*.v'],

    'text/x-cpp-objdump': ['*.cpp-objdump', '*.c++-objdump', '*.cxx-objdump'],

    'text/x-crocsrc': ['*.croc'],

    'text/x-csharp': ['*.cs'],

    'text/x-cuda': ['*.cu', '*.cuh'],

    'text/x-cython': ['*.pyx', '*.pxd', '*.pxi'],

    'text/x-d-objdump': ['*.d-objdump'],

    'text/x-dart': ['*.dart'],

    'text/x-dg': ['*.dg'],

    'text/x-diff': ['*.diff', '*.patch'],

    'text/x-dsrc': ['*.d', '*.di'],

    'text/x-duel': ['*.duel', '*.jbst'],

    'text/x-dylan': ['*.dylan', '*.dyl', '*.intr'],

    'text/x-dylan-console': ['*.dylan-console'],

    'text/x-dylan-lid': ['*.lid', '*.hdp'],

    'text/x-echdr': ['*.ec', '*.eh'],

    'text/x-elixir': ['*.ex', '*.exs'],

    'text/x-erl-shellsession': ['*.erl-sh'],

    'text/x-erlang': ['*.erl', '*.hrl', '*.es', '*.escript'],

    'text/x-factor': ['*.factor'],

    'text/x-fancysrc': ['*.fy', '*.fancypack'],

    'text/x-felix': ['*.flx', '*.flxh'],

    'text/x-fortran': ['*.f', '*.f90', '*.F', '*.F90'],

    'text/x-fsharp': ['*.fs', '*.fsi'],

    'text/x-gas': ['*.s', '*.S'],

    'text/x-gherkin': ['*.feature'],

    'text/x-glslsrc': ['*.vert', '*.frag', '*.geo'],

    'text/x-gnuplot': ['*.plot', '*.plt'],

    'text/x-gooddata-cl': ['*.gdc'],

    'text/x-gooddata-maql': ['*.maql'],

    'text/x-gosrc': ['*.go'],

    'text/x-gosu': ['*.gs', '*.gsx', '*.gsp', '*.vark'],

    'text/x-gosu-template': ['*.gst'],

    'text/x-groovy': ['*.groovy'],

    'text/x-haml': ['*.haml'],

    'text/x-haskell': ['*.hs'],

    'text/x-hybris': ['*.hy', '*.hyb'],

    'text/x-ini': ['*.ini', '*.cfg'],

    'text/x-iokesrc': ['*.ik'],

    'text/x-iosrc': ['*.io'],

    'text/x-irclog': ['*.weechatlog'],

    'text/x-jade': ['*.jade'],

    'text/x-java': ['*.java'],

    'text/x-java-properties': ['*.properties'],

    'text/x-julia': ['*.jl'],

    'text/x-kconfig': ['Kconfig', '*Config.in*', 'external.in*', 'standard-modules.in'],

    'text/x-koka': ['*.kk', '*.kki'],

    'text/x-kotlin': ['*.kt'],

    'text/x-lasso': ['*.lasso', '*.lasso[89]'],

    'text/x-literate-haskell': ['*.lhs'],

    'text/x-llvm': ['*.ll'],

    'text/x-logos': ['*.x', '*.xi', '*.xm', '*.xmi'],

    'text/x-logtalk': ['*.lgt'],

    'text/x-lua': ['*.lua', '*.wlua'],

    'text/x-makefile': ['*.mak', 'Makefile', 'makefile', 'Makefile.*', 'GNUmakefile'],

    'text/x-minidsrc': ['*.md'],

    'text/x-markdown': ['*.md'],

    'text/x-modelica': ['*.mo'],

    'text/x-modula2': ['*.def', '*.mod'],

    'text/x-monkey': ['*.monkey'],

    'text/x-moocode': ['*.moo'],

    'text/x-moonscript': ['*.moon'],

    'text/x-nasm': ['*.asm', '*.ASM'],

    'text/x-nemerle': ['*.n'],

    'text/x-newlisp': ['*.lsp', '*.nl'],

    'text/x-newspeak': ['*.ns2'],

    'text/x-nimrod': ['*.nim', '*.nimrod'],

    'text/x-nsis': ['*.nsi', '*.nsh'],

    'text/x-objdump': ['*.objdump'],

    'text/x-objective-c': ['*.m', '*.h'],

    'text/x-objective-c++': ['*.mm', '*.hh'],

    'text/x-objective-j': ['*.j'],

    'text/x-ocaml': ['*.ml', '*.mli', '*.mll', '*.mly'],

    'text/x-ooc': ['*.ooc'],

    'text/x-opa': ['*.opa'],

    'text/x-openedge': ['*.p', '*.cls'],

    'text/x-pascal': ['*.pas'],

    'text/x-perl': ['*.pl', '*.pm'],

    'text/x-php': ['*.php', '*.php[345]', '*.inc'],

    'text/x-povray': ['*.pov', '*.inc'],

    'text/x-powershell': ['*.ps1'],

    'text/x-prolog': ['*.prolog', '*.pro', '*.pl'],

    'text/x-python': ['*.py', '*.pyw', '*.sc', 'SConstruct', 'SConscript', '*.tac', '*.sage'],

    'text/x-python-traceback': ['*.pytb'],

    'text/x-python3-traceback': ['*.py3tb'],

    'text/x-r-doc': ['*.Rd'],

    'text/x-racket': ['*.rkt', '*.rktl'],

    'text/x-rebol': ['*.r', '*.r3'],

    'text/x-robotframework': ['*.txt', '*.robot'],

    'text/x-rpm-spec': ['*.spec'],

    'text/x-rst': ['*.rst', '*.rest'],

    'text/x-ruby': ['*.rb', '*.rbw', 'Rakefile', '*.rake', '*.gemspec', '*.rbx', '*.duby'],

    'text/x-rustsrc': ['*.rs', '*.rc'],

    'text/x-sass': ['*.sass'],

    'text/x-scala': ['*.scala'],

    'text/x-scaml': ['*.scaml'],

    'text/x-scheme': ['*.scm', '*.ss'],

    'text/x-scss': ['*.scss'],

    'text/x-smalltalk': ['*.st'],

    'text/x-snobol': ['*.snobol'],

    'text/x-sourcepawn': ['*.sp'],

    'text/x-sql': ['*.sql'],

    'text/x-sqlite3-console': ['*.sqlite3-console'],

    'text/x-squidconf': ['squid.conf'],

    'text/x-standardml': ['*.sml', '*.sig', '*.fun'],

    'text/x-systemverilog': ['*.sv', '*.svh'],

    'text/x-tcl': ['*.tcl'],

    'text/x-tea': ['*.tea'],

    'text/x-tex': ['*.tex', '*.aux', '*.toc'],

    'text/x-typescript': ['*.ts'],

    'text/x-vala': ['*.vala', '*.vapi'],

    'text/x-vbnet': ['*.vb', '*.bas'],

    'text/x-verilog': ['*.v'],

    'text/x-vhdl': ['*.vhdl', '*.vhd'],

    'text/x-vim': ['*.vim', '.vimrc', '.exrc', '.gvimrc', '_vimrc', '_exrc', '_gvimrc', 'vimrc', 'gvimrc'],

    'text/x-windows-registry': ['*.reg'],

    'text/x-xtend': ['*.xtend'],

    'text/x-yaml': ['*.yaml', '*.yml'],

    'text/xml': ['*.xml', '*.xsl', '*.rss', '*.xslt', '*.xsd', '*.wsdl'],

    'text/xquery': ['*.xqy', '*.xquery', '*.xq', '*.xql', '*.xqm'],

    'text/apl': [],

    'text/x-asterisk': [],

    'text/x-csrc': [],

    'text/x-c++src': ['*.cpp'],

    'text/x-coffeescript': ['*.coffee'],

    'text/x-d': ["*.d"],

    'text/x-ecl': ['*.ecl'],

    'text/x-go': ['*.go'],

    'text/x-haxe': ['*.hx'],

    'application/x-aspx': ['*.aspx'],

    'application/x-ejs': [],

    'message/http': [],

    'application/x-json': ['*.json'],

    'application/typescript': ['*.ts'],

    'jinja2': ['.jinja2'],

    'text/x-less': ['*.less'],

    'text/x-livescript': ['*.ls'],

    'text/mirc': [],

    'text/n-triples': [],

    'application/x-httpd-php': ['*.php'],

    'text/x-pig': [],

    'text/x-properties': ['*.properties'],

    'text/x-rsrc': [],

    'text/x-sh': ['*.sh', '*.ksh', '*.bash', '*.ebuild', '*.eclass', '.bashrc', 'bashrc', '.bash_*', 'bash_*'],

    'application/sieve': [],

    'text/x-stsrc': ['*.rs', '*.rc'],

    'text/x-smarty': ['*.tpl'],

    'application/x-sparql-query': [],

    'text/x-mariadb': ['*.sql'],

    'text/x-stex': [],

    'text/x-latex': ["*.ltx"],

    'text/x-tiddlywiki': [],

    'text/tiki': [],

    'text/x-vb': ['*.vb'],

    'text/vbscript': ['*.vb'],

    'text/velocity': [],

    'application/xml': ['*.xml', '*.xsl', '*.rss', '*.xslt', '*.xsd', '*.wsdl'],

    'application/xquery': ['*.xqy', '*.xquery', '*.xq', '*.xql', '*.xqm'],

    'text/x-z80': [],

}

                <div style="padding:0px 0px 0px 42px">

                <label for='lifetime'>${_('Gist lifetime')}</label>

                ${h.select('lifetime', '', c.lifetime_options)}

                </div>

                    ${h.select('mimetype','plain',[('plain',_('plain'))])}

            var modes_select = YUD.get('mimetype');

                var opt = new Option(m.name, m.mime);

                YUD.setAttribute(opt, 'mode', m.mode)

                modes_select.options[i+1] = opt;

                var node = selected.options[selected.selectedIndex];

                var mimetype = node.value;

                var new_mode = YUD.getAttribute(node, 'mode')

                var proposed_mimetypes = MIME_TO_EXT[mimetype] || [];

                if(proposed_mimetypes.length < 1){

                    //fallback to text/plain

                    proposed_mimetypes = ['.txt']

                }

                var mt = proposed_mimetypes[0];

                if(mt[0] == '*'){

                    mt = mt.substr(1)

                }

                YUD.get('filename').value = 'filename1' + mt;