inst/plumber/09-content-type/plumber.R
In trestletech/plumber: An API Generator for R
#* @serializer contentType list(type="application/pdf")
#* @get /pdf
function(){
tmp <- tempfile()
pdf(tmp)
plot(1:10, type="b")
text(4, 8, "PDF from plumber!")
dev.off()
readBin(tmp, "raw", n=file.info(tmp)$size)
}
#* @serializer contentType list(type="text/plain")
#* @get /text
function(){
"just plain text here..."
}
#* @serializer contentType list(type="text/html")
#* @get /html
function(){
"<html><h1>HTML!</h1>HTML here!</html>"
}
#* Download a binary file.
#* @serializer contentType list(type="application/octet-stream")
#* @get /download-binary
function(res){
# TODO: Stream the data into the response rather than loading it all in memory
# first.
# Create a temporary example RDS file
x <- list(a=123, b="hi!")
tmp <- tempfile(fileext=".rds")
saveRDS(x, tmp)
# This header is a convention that instructs browsers to present the response
# as a download named "mydata.Rds" rather than trying to render it inline.
res$setHeader("Content-Disposition", "attachment; filename=mydata.Rds")
# Read in the raw contents of the binary file
bin <- readBin(tmp, "raw", n=file.info(tmp)$size)
# Delete the temp file
file.remove(tmp)
# Return the binary contents
bin
}
trestletech/plumber documentation built on May 6, 2024, 6:17 p.m.
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#* @serializer contentType list(type="application/pdf")
#* @get /pdf
function(){
tmp <- tempfile()
pdf(tmp)
plot(1:10, type="b")
text(4, 8, "PDF from plumber!")
dev.off()
readBin(tmp, "raw", n=file.info(tmp)$size)
}
#* @serializer contentType list(type="text/plain")
#* @get /text
function(){
"just plain text here..."
}
#* @serializer contentType list(type="text/html")
#* @get /html
function(){
"<html><h1>HTML!</h1>HTML here!</html>"
}
#* Download a binary file.
#* @serializer contentType list(type="application/octet-stream")
#* @get /download-binary
function(res){
# TODO: Stream the data into the response rather than loading it all in memory
# first.
# Create a temporary example RDS file
x <- list(a=123, b="hi!")
tmp <- tempfile(fileext=".rds")
saveRDS(x, tmp)
# This header is a convention that instructs browsers to present the response
# as a download named "mydata.Rds" rather than trying to render it inline.
res$setHeader("Content-Disposition", "attachment; filename=mydata.Rds")
# Read in the raw contents of the binary file
bin <- readBin(tmp, "raw", n=file.info(tmp)$size)
# Delete the temp file
file.remove(tmp)
# Return the binary contents
bin
}
R Package Documentation
Browse R Packages
We want your feedback!
Note that we can't provide technical support on individual packages. You should contact the package authors for that.
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