[R] readHTMLTable (XML package)

Lopez, Dan lopez235 at llnl.gov
Tue Jan 15 23:31:47 CET 2013

Hi Ista,

It does exist. It’s a page in our company intranet.

It is https so it looks like I can't use RCurl either. I tried RCurl BTW and got the below error.

Do you have experience with pulling a table of an https site? If so how do I do that?

> tabs <- readHTMLTable(getURL("https://hr-workforce-analytics.llnl.gov/wf_pi_pop.html"))
Error in readHTMLTable(getURL("https://hr-workforce-analytics.llnl.gov/wf_pi_pop.html")) : 
  error in evaluating the argument 'doc' in selecting a method for function 'readHTMLTable': Error in function (type, msg, asError = TRUE)  : 
  SSL certificate problem, verify that the CA cert is OK. Details:
error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed


-----Original Message-----
From: Ista Zahn [mailto:istazahn at gmail.com] 
Sent: Tuesday, January 15, 2013 12:22 PM
To: Lopez, Dan
Cc: R help (r-help at r-project.org)
Subject: Re: [R] readHTMLTable (XML package)

Hi Dan,

A couple of things: first, I think that file really does not exist (at least I can't open it in my web browser). Second, even if it did,
url() cannot download from https, according to the details section of ?url, which points you to RCurl. So, once you verify that you url actually exists you can do something like

tabs <- readHTMLTable(getURL("http://en.wikipedia.org/wiki/List_of_countries_by_population"))


On Tue, Jan 15, 2013 at 2:59 PM, Lopez, Dan <lopez235 at llnl.gov> wrote:
> Hi,
> I am using XML::readHTMLTable and getting the below error. Does anyone know why? Does this function not work with https? I didn't see anything in help about that.
>> library(XML)
>> wampage<-readHTMLTable('https://hr-workforce-analytics.llnl.gov/wf_pi
>> _pop.html',1)
> Error in htmlParse(doc) :
>   File https://hr-workforce-analytics.llnl.gov/wf_pi_pop.html does not 
> exist
> Dan
>         [[alternative HTML version deleted]]
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