rcurl

I am trying to install a package from github in R, however I am getting the following error: > install_github("jmp75/rClr", build_vignettes=TRUE) Downloading github repo jmp75/rClr@master Error in curl::curl_fetch_memory(url, handle = handle) : Peer certificate cannot be authenticated with given CA certificates I have set the RCurl options as such: options(RCurlOptions = c(getOption("RCurlOptions"), ssl.verifypeer = FALSE, ssl.verifyhost = FALSE ) ) After checking the setting: getOption("RCurlOptions") we see.... $cainfo [1] "C:/_CODE/R/Library/RCurl/etc/ca-bundle.crt" $ssl.verifypeer [1]

I am having a bit of trouble installing XML and RCurl on my Ubuntu machine 13.10. I performed all sudo update and upgrades today. I am trying to use rattle for R. I am unable to install 'XML' which is required for the use of rattle. This is pretty much the same question that was asked right here just a year later and a different OS. Here are the error messages that I am getting back: > install.packages("RCurl") Installing package into ‘/home/steven/R/x86_64-pc-linux-gnu-library/3.0’ (as ‘lib’ is unspecified) trying URL 'http://cran.rstudio.com/src/contrib/RCurl_1.95-4.1.tar.gz' Content type

I want to download data from this webpage The data can be easily scraped with rvest . The code maybe like this : library(rvest) library(pipeR) url <- "http://www.tradingeconomics.com/" css <- "#ctl00_ContentPlaceHolder1_defaultUC1_CurrencyMatrixAllCountries1_GridView1" data <- url %>>% html() %>>% html_nodes(css) %>>% html_table() But there is a problem for webpages like this. There is a + button to show the data of all the countries, but the default is just data of 50 countries. So if I use the code, I can just scrape data of 50 countries. The + button is made in javascript , so I want to

I am trying to extract the values of all the values in all tabs from this page. http://www.imd.gov.in/section/hydro/dynamic/rfmaps/weekrain.htm I first tried downloading as excel. But that was not possible. I am just able to download it as text file. If I try reading directly from webpage I get the raw html page. I am stuck as how to extract these values. Please find the code which I tried till now. library(RCurl) require(XML) url = "http://www.imd.gov.in/section/hydro/dynamic/rfmaps/weekrain.htm" download.file(url = url, destfile = "E:\\indiaprecip") Just use function "htmlTreeParse" from XML

As a way of exploring how to make a package in R for the Denver RUG, I decided that it would be a fun little project to write an R wrapper around the datasciencetoolkit API. The basic R tools come from the RCurl package as you might imagine. I am stuck on a seemingly simple problem and I'm hoping that somebody in this forum might be able to point me in the right direction. The basic problem is that I can't seem to use postForm() to pass an un-keyed string as part of the data option in curl, i.e. curl -d "string" "address_to_api". For example, from the command line I might do $ curl -d "Tim O

I am trying to download a file from an https page that requires an "I Agree" button be pushed and then stores a cookie. My apologies if this answer is obvious somewhere.. When I open up the web page directly in Chrome and click "I Agree" - the file starts to download automatically. http://www.icpsr.umich.edu/cgi-bin/bob/zipcart2?path=SAMHDA&study=32722&bundle=delimited&ds=1&dups=yes I tried to replicate this example , but I don't think that hangseng website actually stores the cookie/authentication, so I don't know if that example should be all I need. Beyond that, I believe the SSL

I am trying to write an R package that accesses some data via a REST API. The API, however, doesn't use http authentication, but rather relies on cookies to keep credentials with the session. Essentially, I'd like to replace the following two lines from a bash script with two R functions: One to perform the login, and store the session cookie, and the second to GET the data. curl -X POST -c cookies.txt -d"username=xxx&password=yyy" http://api.my.url/login curl -b cookies.txt http://api.my.url/data I'm clearly not understanding how RCurl works with curl options. My script as it stands has: