Download.file fails in RStudio

Question

file<-tempfile(fileext=\".csv\")
download.file(url=\"ftp://pubftp.spp.org/Markets/DA/LMP_By_SETTLEMENT_LOC/2014/03/28/DA-LMP-SL-201403280100.csv\",destfile=file,m         


        

Answer 1

This works!

file<-'http://data.baltimorecity.gov/api/views/dz54-2aru/rows.csv?accessType=DOWNLOAD' download.file(file, destfile="camera1.csv")

Answer 2

I had a similar issue using R's download.file in a for loop in RStudio. It would download the url for the first several links and then I'd get "InternetOpenUrl failed: 'The operation timed out'" for all subsequent downloads. I tried the the suggestion by sssheridan to unselect the Internet Explorer option in R global options which did not work. I also tried setInternet2(use=T) but this is no longer available in R.

What worked for me was to remove the cache by including cacheOK = F as an argument in download.file. I think this is because I had previously hit the links that were timing out.

Answer 3

I have the same problem when I download a file in RStudio when using

> source("http://www.statmethods.net/RiA/wmc.txt")
Error in file(filename, "r", encoding = encoding) : 
  cannot open the connection
In addition: Warning message:
In file(filename, "r", encoding = encoding) :
  InternetOpenUrl failed: '安全频道支持出错'

Then I try

> options(download.file.method="libcurl", url.method="libcurl")
> source("http://www.statmethods.net/RiA/wmc.txt")
> wmc

It worked

Answer 4

I found two solutions.

1) Go to Tools > Global Options > Packages, and unselect "Use Internet Explorer library/proxy for HTTP".

2) This worked for another user, but not for me: setInternet2(use=FALSE)

(https://support.rstudio.com/hc/communities/public/questions/200656136-Issue-With-RStudio-and-GEOquery)

Note: when in RGUI I entered setInternet2(use=TRUE), then tried the download, it gave the "using Synchronous WinInet calls" messages and hung; but then Windows Firewall popped up, and when I allowed RGUI through it, the download began.

Answer 5

Go to Tools > Global Option > Packages > uncheck "Use secure download method for HTTP".