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12 KiB
12 KiB
wand
Lightweight File ‘MIME’ Type Detection Based On Contents or Extension
Description
‘MIME’ types are shorthand descriptors for file contents and can be determined from “magic” bytes in file headers, file contents or intuited from file extensions. Tools are provided to perform curated “magic” tests as well as mapping ‘MIME’ types from a database of over 1,500 extension mappings.
Provides a more portable/ligtweight alternative to the wand package.
SOME IMPORTANT DETAILS
The header checking is minimal (i.e. nowhere near as comprehensive as
libmagic) but covers quite a bit of ground. If there are content-check
types from magic sources
that you would like coded into the package, please file an issue and
include the full line(s) from that linked magic.tab that you would
like mapped.
What’s Inside The Tin
get_content_type: Discover MIME type of a file based on contentsguess_content_type: Guess MIME type from filename (extension)simplemagic_mime_db: File extension-to-MIME mapping data frame
The following functions are implemented:
Installation
devtools::install_git("https://gitlab.com/hrbrmstr/wand")
Usage
library(wand)
library(tidyverse)
# current verison
packageVersion("wand")
## [1] '0.3.0'
list.files(system.file("extdat", package="wand"), full.names=TRUE) %>%
map_df(~{
data_frame(
fil = basename(.x),
mime = list(get_content_type(.x))
)
}) %>%
unnest() %>%
print(n=100)
## # A tibble: 85 x 2
## fil mime
## <chr> <chr>
## 1 actions.csv application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
## 2 actions.txt application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
## 3 actions.xlsx application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
## 4 test_1.2.class application/java-vm
## 5 test_1.3.class application/java-vm
## 6 test_1.4.class application/java-vm
## 7 test_1.5.class application/java-vm
## 8 test_128_44_jstereo.mp3 audio/mp3
## 9 test_excel_2000.xls application/msword
## 10 test_excel_spreadsheet.xml application/xml
## 11 test_excel_web_archive.mht message/rfc822
## 12 test_excel.xlsm application/zip
## 13 test_excel.xlsx application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
## 14 test_nocompress.tif image/tiff
## 15 test_powerpoint.pptm application/zip
## 16 test_powerpoint.pptx application/vnd.openxmlformats-officedocument.presentationml.presentation
## 17 test_word_2000.doc application/msword
## 18 test_word_6.0_95.doc application/msword
## 19 test_word.docm application/zip
## 20 test_word.docx application/vnd.openxmlformats-officedocument.wordprocessingml.document
## 21 test.au audio/basic
## 22 test.bin application/mac-binary
## 23 test.bin application/macbinary
## 24 test.bin application/octet-stream
## 25 test.bin application/x-binary
## 26 test.bin application/x-macbinary
## 27 test.bmp image/bmp
## 28 test.dtd application/xml-dtd
## 29 test.emf application/x-msmetafile
## 30 test.eps application/postscript
## 31 test.fli video/flc
## 32 test.fli video/fli
## 33 test.fli video/x-fli
## 34 test.gif image/gif
## 35 test.ico image/x-icon
## 36 test.java text/plain
## 37 test.java text/x-java
## 38 test.java text/x-java-source
## 39 test.jpg image/jpeg
## 40 test.mp3 audio/mp3
## 41 test.odt application/vnd.oasis.opendocument.text
## 42 test.ogg application/ogg
## 43 test.ogg audio/ogg
## 44 test.pcx image/pcx
## 45 test.pcx image/x-pcx
## 46 test.pdf application/pdf
## 47 test.pl text/plain
## 48 test.pl text/x-perl
## 49 test.pl text/x-script.perl
## 50 test.png image/png
## 51 test.pnm application/x-portable-anymap
## 52 test.pnm image/x-portable-anymap
## 53 test.ppm image/x-portable-pixmap
## 54 test.ppt application/msword
## 55 test.ps application/postscript
## 56 test.psd image/photoshop
## 57 test.py text/x-python
## 58 test.py text/x-script.phyton
## 59 test.rtf application/rtf
## 60 test.rtf application/x-rtf
## 61 test.rtf text/richtext
## 62 test.rtf text/rtf
## 63 test.sh application/x-bsh
## 64 test.sh application/x-sh
## 65 test.sh application/x-shar
## 66 test.sh text/x-script.sh
## 67 test.sh text/x-sh
## 68 test.tar application/pax
## 69 test.tar.gz application/octet-stream
## 70 test.tar.gz application/x-compressed
## 71 test.tar.gz application/x-gzip
## 72 test.tga image/x-tga
## 73 test.txt text/plain
## 74 test.txt.gz application/octet-stream
## 75 test.txt.gz application/x-compressed
## 76 test.txt.gz application/x-gzip
## 77 test.wav audio/x-wav
## 78 test.wmf application/x-msmetafile
## 79 test.wmf windows/metafile
## 80 test.xcf application/x-xcf
## 81 test.xml application/xml
## 82 test.xpm image/x-xbitmap
## 83 test.xpm image/x-xpixmap
## 84 test.xpm image/xpm
## 85 test.zip application/zip
Code of Conduct
Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms.