dataURI {base64enc}

R Documentation

Create a data URI string

Description

dataURI creates URI with the data: scheme by encoding the payload either using base64 ot URI encoding.

Usage

dataURI(data, mime = "", encoding = "base64", file)

Arguments

data	raw vector, connection or character vector to use as payload. Character vectors of more than one element are collapsed using "\n" before encoding.
mime	MIME-type of the data (per standard "" is interpreted as "text/plain;charset=US-ASCII" without including it in the URI)
encoding	data encoding to use. Must be either "base64" or NULL
file	filename (string) to open as payload. file and data are mutually exclusive

Value

string of the form data:[mime][;base64],<encoded-payload>

Author(s)

Simon Urbanek

References

RFC 2397 The "data" URL scheme

Examples

  dataURI(as.raw(1:10)) # default is base64
  dataURI(as.raw(1:10), encoding=NULL) # URI
  if (require("png", quietly=TRUE)) {
    # let's say you have an image - e.g. from dev.capture(TRUE)
    img <- matrix(1:16/16, 4)
    dataURI(writePNG(img), "image/png")
    # or straight from a file
    dataURI(file=system.file("img", "Rlogo.png", package="png"), mime="image/png")
  }

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