Writing Curl POST in R - r

Question

What is the correct way of writing this Curl POST in R?
I would like to have R read the contents of a file as "values" in the post form.
curl -X POST https://api.priceapi.com/jobs \
-d "token=token" \
-d "country=country" \
-d "source=source" \
-d "currentness=currentness" \
-d "completeness=completeness" \
-d "key=key" \
-d 'values=<values>'
So far I have this-
library(RCurl)
library(RJSONIO)
url = "https://api.priceapi.com/jobs"
file.name = ".../output 1 .txt"
results = postForm(url, token="token",
country="country,
source="source",
currentness="currentness",
completeness="completeness,
key="key",
values=fileUpload(filename = file.name))
It returns "Error: Bad Request"
I also tried it using httr post request-
r = POST(url, body = list(token="token",
country="country,
source="source",
currentness="currentness",
completeness="completeness,
key="key",
values=upload_file(file.name)) )
Here upload_file is not uploading the contents of the file but, I am guessing it is passing the path to the file (as a string) into the "values" parmeter.
Naturally that does not return the correct results.
The result of the httr POST request is;
Response [https://api.priceapi.com/jobs]
Date: 2016-12-13 10:11
Status: 400
Content-Type: application/json; charset=utf-8
Size: 228 B
{
"success": false,
"reason": "parameter value invalid",
"parameter": "value",
"valid values": "An array or a string containing values separated by newline",
"comment": "Make sure the parameter 'value' has a valid value!"

Answer 1

I could solve this by using
file=readLines(".../output 1.txt")
inputValues <- paste(file,collapse="\n")
and then passing inputValues in the values parameter.