Create a data URI string — dataURI • base64enc

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>

References

RFC 2397 The "data" URL scheme

Author

Simon Urbanek

Examples

  dataURI(as.raw(1:10)) # default is base64
#> [1] "data:;base64,AQIDBAUGBwgJCg=="
  dataURI(as.raw(1:10), encoding=NULL) # URI
#> [1] "data:,%01%02%03%04%05%06%07%08%09%0A"
  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")
  }