From ripley@stats.ox.ac.uk  Wed Jun 19 09:58:17 2002
From: ripley@stats.ox.ac.uk (Prof Brian D Ripley)
Date: Wed, 19 Jun 2002 09:58:17 +0100 (BST)
Subject: [R] Problems with url/download and http_proxy
In-Reply-To: <Pine.LNX.4.31.0206182020400.18450-100000@gannet.stats>
Message-ID: <Pine.GSO.4.44.0206190956050.15670-100000@auk.stats>

It's a bug in the libxml code causing the port to be set to zero.
Comment lines like

    /*if (proxyPort != 0) {
	proxyPort = 0;
	}*/

in nanohttp.c and nanoftp.c.  (The port has already been set in the
caller.)

Please confirm that this works.


On Tue, 18 Jun 2002 ripley@stats.ox.ac.uk wrote:

> The port is not supposed to be required, so rather than fix the docs can
> anyone fix the problem?
>
>
> On Tue, 18 Jun 2002, Warnes, Gregory R wrote:
>
> >
> > Just adding the trailing slash doesn't seem to help:
> >
> > 	> Sys.getenv('http_proxy')
> > 	                  http_proxy
> > 	"http://gproxy1.pfizer.com/"
> >
> > 	> url("http://cran.r-project.org/src/contrib/PACKAGES",'r')
> > 	connect: Cannot assign requested address
> > 	unable to connect to 'gproxy1.pfizer.com'.
> > 	Error in url("http://cran.r-project.org/src/contrib/PACKAGES", "r")
> > :
> > 	        cannot open URL
> > `http://cran.r-project.org/src/contrib/PACKAGES'
> >
> > But adding the port explicitly does:
> >
> > 	> Sys.getenv("http_proxy")
> > 	                     http_proxy
> > 	"http://gproxy1.pfizer.com:80/"
> > 	>  url("http://cran.r-project.org/src/contrib/PACKAGES",'r')
> > 	                                     description
> > 	"http://cran.r-project.org/src/contrib/PACKAGES"
> > 	                                           class
> > 	                                           "url"
> > 	                                            mode
> > 	                                             "r"
> > 	                                            text
> > 	                                          "text"
> > 	                                          opened
> > 	                                        "opened"
> > 	                                        can read
> > 	                                           "yes"
> > 	                                       can write
> > 	                                            "no"
> >
> >
> >
> > even if the trailing slash is not present:
> >
> > > Sys.getenv("http_proxy")
> >                     http_proxy
> > "http://gproxy1.pfizer.com:80"
> >
> > > url("http://cran.r-project.org/src/contrib/PACKAGES",'r')
> >                                      description
> > "http://cran.r-project.org/src/contrib/PACKAGES"
> >                                            class
> >                                            "url"
> >                                             mode
> >                                              "r"
> >                                             text
> >                                           "text"
> >                                           opened
> >                                         "opened"
> >                                         can read
> >                                            "yes"
> >                                        can write
> >                                             "no"
> >
> >
> > Perhaps the documentation for download.file should be changed to note the
> > requirement of the port.  The paragraph on proxies could be changed from
> >
> >
> >      Proxies can be specified via environment variables. Setting
> >      `"no_proxy"' stops any proxy being tried. Otherwise the setting of
> >      `"http_proxy"' or `"ftp_proxy"' (or failing that, the all
> >      upper-case version) is consulted and if non-empty used as a proxy
> >      site.  For FTP transfers, the username and password on the proxy
> >      can be specified by `"ftp_proxy_user"' and `"ftp_proxy_password"'.
> >
> >
> > to something like:
> >
> >      Proxies can be specified via the environment variables `"http_proxy"'
> >      or `"HTTP_PROXY"' and `"ftp_proxy'" or `"FTP_PROXY"'.  These variables
> >      must be of the form `protocol://machine.domain.tld:port'.  For FTP
> >      transfers, the username and password on the proxy can be specified by
> >     `"ftp_proxy_user"' and `"ftp_proxy_password"'.  Setting `"no_proxy"'
> >      prevents the use of any proxy.
> >
> >
> > -Greg
> >
> > > -----Original Message-----
> > > From: ripley@stats.ox.ac.uk [mailto:ripley@stats.ox.ac.uk]
> > > Sent: Tuesday, June 18, 2002 11:43 AM
> > > To: Warnes, Gregory R
> > > Cc: 'r-help@stat.math.ethz.ch'; 'bioconductor@stat.math.ethz.ch'
> > > Subject: Re: [R] Problems with url/download and http_proxy
> > >
> > >
> > > The code (which you do have available to you) says http_proxy
> > >
> > >  * Should be like http://myproxy/ or http://myproxy:3128/
> > >
> > > which yours is not, so please try that format.  The code suggests
> > > that the traling / can be omitted, but the words do not.
> > >
> > > --
> > > Brian D. Ripley,                  ripley@stats.ox.ac.uk
> > > Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
> > > University of Oxford,             Tel:  +44 1865 272861 (self)
> > > 1 South Parks Road,                     +44 1865 272860 (secr)
> > > Oxford OX1 3TG, UK                Fax:  +44 1865 272595
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> --
> Brian D. Ripley,                  ripley@stats.ox.ac.uk
> Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
> University of Oxford,             Tel:  +44 1865 272861 (self)
> 1 South Parks Road,                     +44 1865 272860 (secr)
> Oxford OX1 3TG, UK                Fax:  +44 1865 272595
>
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-- 
Brian D. Ripley,                  ripley@stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272860 (secr)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

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[R] Problems with url/download and http_proxy
Prof Brian D Ripley