The data mimemap is a named character vector that stores the filename
extensions and the corresponding MIME types, e.g. c(html = 'text/html', pdf = 'application/pdf', ...). The character vector mime:::mimeextra stores
some additional types that we know, such as Markdown files (.md), or R
scripts (.R).
The file /etc/mime.types on Debian.
str(as.list(mimemap))
#> List of 1548
#> $ % : chr "application/x-trash"
#> $ ~ : chr "application/x-trash"
#> $ 123 : chr "application/vnd.lotus-1-2-3"
#> $ 1905.1 : chr "application/vnd.ieee.1905"
#> $ 1clr : chr "application/clr"
#> $ 1km : chr "application/vnd.1000minds.decision-model+xml"
#> $ 210 : chr "application/p21"
#> $ 3dm : chr "text/vnd.in3d.3dml"
#> $ 3dml : chr "text/vnd.in3d.3dml"
#> $ 3mf : chr "application/vnd.ms-3mfdocument"
#> $ 3tz : chr "application/vnd.maxar.archive.3tz+zip"
#> $ 726 : chr "audio/32kadpcm"
#> $ 7z : chr "application/x-7z-compressed"
#> $ a : chr "text/vnd.a"
#> $ a2l : chr "application/A2L"
#> $ aa3 : chr "audio/ATRAC3"
#> $ aac : chr "audio/aac"
#> $ aal : chr "audio/ATRAC-ADVANCED-LOSSLESS"
#> $ abc : chr "text/vnd.abc"
#> $ abw : chr "application/x-abiword"
#> $ ac : chr "application/pkix-attr-cert"
#> $ ac2 : chr "application/vnd.banana-accounting"
#> $ ac3 : chr "audio/ac3"
#> $ acc : chr "application/vnd.americandynamics.acc"
#> $ acn : chr "audio/asc"
#> $ acu : chr "application/vnd.acucobol"
#> $ acutc : chr "application/vnd.acucorp"
#> $ adts : chr "audio/aac"
#> $ aep : chr "application/vnd.audiograph"
#> $ afp : chr "application/vnd.afpc.modca"
#> $ age : chr "application/vnd.age"
#> $ ahead : chr "application/vnd.ahead.space"
#> $ ai : chr "application/postscript"
#> $ aif : chr "audio/x-aiff"
#> $ aifc : chr "audio/x-aiff"
#> $ aiff : chr "audio/x-aiff"
#> $ aion : chr "application/vnd.veritone.aion+json"
#> $ ait : chr "application/vnd.dvb.ait"
#> $ alc : chr "chemical/x-alchemy"
#> $ ami : chr "application/vnd.amiga.ami"
#> $ aml : chr "application/AML"
#> $ amlx : chr "application/automationml-amlx+zip"
#> $ amr : chr "audio/AMR"
#> $ AMR : chr "audio/AMR"
#> $ anx : chr "application/annodex"
#> $ apex : chr "application/vnd.apexlang"
#> $ apexlang : chr "application/vnd.apexlang"
#> $ apk : chr "application/vnd.android.package-archive"
#> $ apkg : chr "application/vnd.anki"
#> $ apng : chr "image/apng"
#> $ appcache : chr "text/cache-manifest"
#> $ apr : chr "application/vnd.lotus-approach"
#> $ apxml : chr "application/auth-policy+xml"
#> $ arrow : chr "application/vnd.apache.arrow.file"
#> $ arrows : chr "application/vnd.apache.arrow.stream"
#> $ art : chr "image/x-jg"
#> $ artisan : chr "application/vnd.artisan+json"
#> $ asc : chr "application/pgp-keys"
#> $ ascii : chr "text/vnd.ascii-art"
#> $ asf : chr "application/vnd.ms-asf"
#> $ asice : chr "application/vnd.etsi.asic-e+zip"
#> $ asics : chr "application/vnd.etsi.asic-s+zip"
#> $ asn : chr "chemical/x-ncbi-asn1"
#> $ aso : chr "application/vnd.accpac.simply.aso"
#> $ ass : chr "audio/aac"
#> $ at3 : chr "audio/ATRAC3"
#> $ atc : chr "application/vnd.acucorp"
#> $ atf : chr "application/ATF"
#> $ atfx : chr "application/ATFX"
#> $ atom : chr "application/atom+xml"
#> $ atomcat : chr "application/atomcat+xml"
#> $ atomdeleted : chr "application/atomdeleted+xml"
#> $ atomsrv : chr "application/atomserv+xml"
#> $ atomsvc : chr "application/atomsvc+xml"
#> $ atx : chr "audio/ATRAC-X"
#> $ atxml : chr "application/ATXML"
#> $ au : chr "audio/basic"
#> $ auc : chr "application/tamp-apex-update-confirm"
#> $ avci : chr "image/avci"
#> $ avcs : chr "image/avcs"
#> $ avi : chr "video/x-msvideo"
#> $ avif : chr "image/avif"
#> $ awb : chr "audio/AMR-WB"
#> $ AWB : chr "audio/AMR-WB"
#> $ axa : chr "audio/annodex"
#> $ axv : chr "video/annodex"
#> $ azf : chr "application/vnd.airzip.filesecure.azf"
#> $ azs : chr "application/vnd.airzip.filesecure.azs"
#> $ azv : chr "image/vnd.airzip.accelerator.azv"
#> $ azw3 : chr "application/vnd.amazon.mobi8-ebook"
#> $ b : chr "chemical/x-molconn-Z"
#> $ b16 : chr "image/vnd.pco.b16"
#> $ bak : chr "application/x-trash"
#> $ bar : chr "application/vnd.qualcomm.brew-app-res"
#> $ bary : chr "model/vnd.bary"
#> $ bat : chr "application/x-msdos-program"
#> $ bcpio : chr "application/x-bcpio"
#> $ bdm : chr "application/vnd.syncml.dm+wbxml"
#> $ bed : chr "application/vnd.realvnc.bed"
#> [list output truncated]
mimemap["pdf"]
#> pdf
#> "application/pdf"
mimemap[c("html", "js", "css")]
#> html js css
#> "text/html" "text/javascript" "text/css"
# additional MIME types (not exported)
mime:::mimeextra
#> jsonp r rd
#> "application/javascript" "text/plain" "text/plain"
#> rmd rnw rproj
#> "text/x-markdown" "text/x-sweave" "text/rstudio"
#> scss
#> "text/css"