Package ‘mime’
October 13, 2022
Type Package
Title Map Filenames to MIME Types
Version 0.12
Description Guesses the MIME type from a filename extension using the data
derived from /etc/mime.types in UNIX-type systems.
Imports tools
License GPL
URL https://github.com/yihui/mime
BugReports https://github.com/yihui/mime/issues
RoxygenNote 7.1.1
Encoding UTF-8
NeedsCompilation yes
Author Yihui Xie [aut, cre] (<https://orcid.org/0000-0003-0645-5666>),
Jeffrey Horner [ctb],
Beilei Bian [ctb]
Maintainer Yihui Xie <xie@yihui.name>
Repository CRAN
Date/Publication 2021-09-28 05:00:05 UTC
R topics documented:
guess_type . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
mimemap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
parse_multipart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Index 5
1
2 guess_type
guess_type Guess the MIME types from filenames
Description
Look up in the mimemap table for the MIME types based on the extensions of the given filenames.
Usage
guess_type(
file,
unknown = "application/octet-stream",
empty = "text/plain",
mime_extra = mimeextra,
subtype = ""
)
Arguments
file a character vector of filenames, or filename extensions
unknown the MIME type to return when the file extension was not found in the table
empty the MIME type for files that do not have extensions
mime_extra a named character vector of the form c(extension = type) providing extra
MIME types (by default, mimeextra); note this MIME table takes precedence
over the standard table mimemap
subtype a character vector of MIME subtypes, which should be of the same length as
file if provided (use an empty character string for a file if we do not want a
subtype for it)
Examples
library(mime)
# well-known file types
guess_type(c("a/b/c.html", "d.pdf", "e.odt", "foo.docx", "tex"))
# not in the standard table, but in mimeextra
guess_type(c("a.md", "b.R"), mime_extra = NULL)
guess_type(c("a.md", "b.R"))
# override the standard MIME table (tex is text/x-tex by default)
guess_type("tex", mime_extra = c(tex = "text/plain"))
# unknown extension 'bar'
guess_type("foo.bar")
# force unknown types to be plain text
guess_type("foo.bar", unknown = "text/plain")
# empty file extension
guess_type("Makefile")
mimemap 3
# we know it is a plain text file
guess_type("Makefile", empty = "text/plain")
# subtypes
guess_type(c("abc.html", "def.htm"), subtype = c("charset=UTF-8", ""))
mimemap Tables for mapping filename extensions to MIME types
Description
The data mimemap is a named character vector that stores the filename extensions and the corre-
sponding MIME types, e.g. c(html = 'text/html',pdf = 'application/pdf', ...). The char-
acter vector mimeextra stores some additional types that we know, such as Markdown files (‘.md’),
or R scripts (‘.R’).
Source
The file ‘/etc/mime.types’ on Debian.
Examples
str(as.list(mimemap))
mimemap["pdf"]
mimemap[c("html", "js", "css")]
# additional MIME types (not exported)
mime:::mimeextra
parse_multipart Parse multipart form data
Description
This function parses the HTML form data from a Rook environment (an HTTP POST request).
Usage
parse_multipart(env)
Arguments
env the HTTP request environment
Value
A named list containing the values of the form data, and the files uploaded are saved to temporary
files (the temporary filenames are returned). It may also be NULL if there is anything unexpected in
the form data, or the form is empty.
4 parse_multipart
References
This function was borrowed from https://github.com/jeffreyhorner/Rook/ with slight mod-
ifications.
Index
∗ datasets
mimemap, 3
guess_type, 2
mimeextra, 2
mimeextra (mimemap), 3
mimemap, 2, 3
parse_multipart, 3
