[R] curl options?

Rasmus Liland jr@| @end|ng |rom po@teo@no
Fri Jul 24 01:20:38 CEST 2020

On 2020-07-23 14:56 -0700, Roy Mendelssohn - NOAA Federal via R-help wrote:
> I am trying to get the following command to work:
> > sshInfo <- rerddap::info('hawaii_soest_f75b_adc6_12ab', url = 'https://apdrc.soest.hawaii.edu/erddap/') 
> On a Mac at least (but I know for a 
> fact not necessarily on other OSes) I 
> get:
> > Error in curl::curl_fetch_memory(x$url$url, handle = x$url$handle) : 
> >   SSL certificate problem: certificate has expired
> Parenthetically,  this also happened 
> with R itself awhile back  where an 
> intermediate cert on the search path 
> had expired,  not the cert of the 
> service itself,  and depending on 
> which implementation of ssl was used,  
> it either ignored it or threw an 
> error,  as  in this case.  Someone I 
> am working with on another OS can 
> indeed run the same command,  so if 
> your particular OS may not have an 
> issue

I can download the dataset without 
problems on my Linux thinkpad.  Perhaps 
you can provide some more info (but I do 
not know what ...) so I/others can 
reproduce this strange error ... 

Have you checked the time on the laptop 
being correct and not set to e.g. 
1970-01-01 01:29?  In the past, I have 
found ssl errors are caused by the time 
being off on my laptop, as in the case 
of a flat cmos battery.

> Anyhow, for a problem a I am working 
> on I need to access this server with 
> that and related commands.  
> 'rerddap::info()' allows me to pass 
> curl options,  and normally with Curl 
> you can get around the expired 
> certificate using the  '-k' or 
> '--insecure' option.  When I look at:
> > curl::curl_options()
> I do not see this option. I do not 
> understand all the options listed 
> there,  so maybe that option is in a 
> different form that I am missing. Or 
> is there another way around this still 
> using 'curl' .  Using another function 
> that does similar to 'curl'  is not an 
> option, because I need the 
> 'rerddap::info()' call which calls a 
> package called "crul" which ultimately 
> calls 'curl'.
> Thanks,
> -Roy
> PS - And yes I informed the owner of 
> the site about the expired 
> certificate,  that was a couple of 
> weeks ago.

Perhaps setting

	options("ssl_verifyhost"=0, "ssl_verifypeer"=0) 

helps? [1]


[1] https://stackoverflow.com/questions/47715918/how-to-pass-the-curl-insecure-alternative-when-using-r

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