[DAS] Re: Hello Jim

Jim Kent jim_kent@pacbell.net
Fri, 15 Mar 2002 10:43:46 -0800


I finally remembered how to check this with telnet.  It looks like
we are and always have been putting in the X-DAS-Version
stuff:

hgwdev% telnet genome.cse.ucsc.edu 80
Trying 128.114.50.188...
Connected to genome.cse.ucsc.edu.
Escape character is '^]'.
GET /cgi-bin/das/dsn HTTP/1.0

HTTP/1.1 200 OK
Date: Fri, 15 Mar 2002 18:24:38 GMT
Server: Apache/1.3.20 (Unix)
X-DAS-Status: 200
X-DAS-Version: DAS/0.95
Connection: close
Content-Type: text/plain; charset=iso-8859-1

<?xml version="1.0" standalone="no"?>
 <DASDSN>
   <DSN>
     <SOURCE id="hg6" version="1.00">Dec. 12, 2000 Human Genome at UCSC</SOURCE>
     <MAPMASTER>http://genome.cse.ucsc.edu:80/cgi-bin/das/hg6</MAPMASTER>
     <DESCRIPTION>Dec. 12, 2000 Human Genome at UCSC</DESCRIPTION>
   </DSN>
   <DSN>
     <SOURCE id="hg7" version="1.00">April 1, 2001 Human Genome at UCSC</SOURCE>
     <MAPMASTER>http://genome.cse.ucsc.edu:80/cgi-bin/das/hg7</MAPMASTER>
     <DESCRIPTION>April 1, 2001 Human Genome at UCSC</DESCRIPTION>
   </DSN>
   <DSN>
     <SOURCE id="hg8" version="1.00">Aug. 6, 2001 Human Genome at UCSC</SOURCE>
     <MAPMASTER>http://genome.cse.ucsc.edu:80/cgi-bin/das/hg8</MAPMASTER>
     <DESCRIPTION>Aug. 6, 2001 Human Genome at UCSC</DESCRIPTION>
   </DSN>
   <DSN>
     <SOURCE id="hg10" version="1.00">Dec. 22, 2001 (NCBI) Human Genome at UCSC</SOURCE>
     <MAPMASTER>http://genome.cse.ucsc.edu:80/cgi-bin/das/hg10</MAPMASTER>
     <DESCRIPTION>Dec. 22, 2001 (NCBI) Human Genome at UCSC</DESCRIPTION>
   </DSN>
 </DASDSN>
Connection closed by foreign host.




Jim Kent  
Genome Bioinformatics Group
University of California at Santa Cruz
http://www.soe.ucsc.edu/~kent/

----- Original Message ----- 
From: "Brian Gilman" <gilmanb@harpo.wi.mit.edu>
To: "Jim Kent" <jim_kent@pacbell.net>
Cc: <das@biodas.org>
Sent: Tuesday, March 12, 2002 2:07 PM
Subject: Re: Hello Jim


> Code looks great!
> 
> My app doesn't care where the header appears. I just need to see
> it when I hit the server at http://genome.ucsc.edu/cgi-bin/das. If I hit
> the server at http://genome.ucsc.edu/cgi-bin/das/dsn I don't see this
> header either. Looks like an HTTP GET is not outputting these
> headers...Thanks Jim!! I really appreciate this!
> 
> -B
> 
> -----------------------
> Brian Gilman <gilmanb@genome.wi.mit.edu>
> Sr. Software Engineer MIT/Whitehead Inst. Center for Genome Research
> One Kendall Square, Bldg. 300 / Cambridge, MA 02139-1561 USA
> phone +1 617  252 1069 / fax +1 617 252 1902
> 
> 
> On Tue, 12 Mar 2002, Jim Kent wrote:
> 
> > Here's the code I have now.  It looks like it has the X-DAS-Status
> > and so forth in it, but not in the order you're expecting.  Isn't the
> > order supposed to be flexible on your side though?
> > 
> > void dasHeader(int err)
> > /* Write out very start of DAS header */
> > {
> > printf("Content-Type:text/plain\n");
> > printf("X-DAS-Version: DAS/0.95\n");
> > printf("X-DAS-Status: %d\n", err);
> > printf("\n");
> > if (err != 200)
> >     exit(-1);
> > printf("<?xml version=\"1.0\" standalone=\"no\"?>\n");
> > }
> > 
> > +++++++++++++++++++++++++++++++++++++++++++++++
> > Jim Kent.  Zahler Lab.  University of California at Santa Cruz
> > http://www.cse.ucsc.edu/~kent/
> > 
> > ----- Original Message ----- 
> > From: "Brian Gilman" <gilmanb@harpo.wi.mit.edu>
> > To: "Jim Kent" <jim_kent@pacbell.net>
> > Cc: <das@biodas.org>
> > Sent: Wednesday, March 06, 2002 11:20 AM
> > Subject: Re: Hello Jim
> > 
> > 
> > > Hello Jim,
> > > 
> > > Here is the current output from your server:
> > > HTTP/1.1 200 OK
> > > Date Wed, 06 Mar 2002 19:19:09 GMT
> > > Server Apache/1.3.20 (Unix)
> > > Keep-Alive timeout=15, max=100
> > > Connection Keep-Alive
> > > Transfer-Encoding chunked
> > > Content-Type text/plain; charset=iso-8859-1
> > > content-length 79
> > > 
> > > 
> > > 
> > > Here is what we are looking for:
> > > 
> > > HTTP/1.1 200 OK
> > > Date Wed, 06 Mar 2002 19:17:44 GMT
> > > Server Apache/1.3.20 (Unix)
> > > X-DAS-Status 200
> > > X-DAS-Version DAS/0.95
> > > Keep-Alive timeout=15, max=100
> > > Connection Keep-Alive
> > > Transfer-Encoding chunked
> > > Content-Type text/plain; charset=iso-8859-1
> > > content-length 1037
> > > 
> > > 
> > > This will allow clients to know what version of the spec you are
> > > supporting at an early stage and reduce the # of round trips we need to
> > > make to figure this out.
> > > 
> > > 
> > > Thanks Jim!!
> > > 
> > > -Brian 
> > > 
> > > 
> > > -----------------------
> > > Brian Gilman <gilmanb@genome.wi.mit.edu>
> > > Sr. Software Engineer MIT/Whitehead Inst. Center for Genome Research
> > > One Kendall Square, Bldg. 300 / Cambridge, MA 02139-1561 USA
> > > phone +1 617  252 1069 / fax +1 617 252 1902
> > > 
> > > 
> > > On Wed, 6 Mar 2002, Jim Kent wrote:
> > > 
> > > > Could you grab the current response from 
> > > > http://genome.ucsc.edu/cgi-bin/das
> > > > put the change you want in, and send it to
> > > > me via email?  I'm not sure where to put it.
> > > > 
> > > > 
> > > > Then, could you please stop changing DAS
> > > > so often?  Double digit version numbers in
> > > > a *standard* are really a sign something is
> > > > broken in the process....
> > > > 
> > > > +++++++++++++++++++++++++++++++++++++++++++++++
> > > > Jim Kent.  Zahler Lab.  University of California at Santa Cruz
> > > > http://www.cse.ucsc.edu/~kent/
> > > > 
> > > > ----- Original Message ----- 
> > > > From: "Brian Gilman" <gilmanb@harpo.wi.mit.edu>
> > > > To: <jim_kent@pacbell.net>
> > > > Cc: <das@biodas.org>
> > > > Sent: Wednesday, March 06, 2002 7:57 AM
> > > > Subject: Hello Jim
> > > > 
> > > > 
> > > > > Hello Jim, 
> > > > > 
> > > > > Long time no talk. As you may know a few of my developers have
> > > > > been pinging you about your DAS server. The spec has changed quite a bit
> > > > > but and there are certain portions that remain ambiguous. One of these
> > > > > ambiguities have caused havok with our DAS API. The specification defines
> > > > > a header called "X-DAS-Version" this header should be available to the
> > > > > requester upon each and every request to the server. However, we have
> > > > > found that if you ping a DAS server without a specific das request ie.
> > > > > 
> > > > > http://genome.ucsc.edu/cgi-bin/das 
> > > > > 
> > > > > We do not see an "X-DAS-Status" header which causes our API to
> > > > > break. I know this is being very nit picky but, with all the versions of
> > > > > DAS laying around, we find that having this header present at the most top
> > > > > level request allows us to handle all these versions seemlessly. 
> > > > > 
> > > > > To that end, could you please add the "X-DAS-Version" header to
> > > > > your DAS server when querying the top most URL
> > > > > (genome.ucsc.edu/cgi-bin/das)? 
> > > > > 
> > > > > 
> > > > > Thank You!!
> > > > > 
> > > > > -Brian Gilman
> > > > > 
> > > > > 
> > > > > -----------------------
> > > > > Brian Gilman <gilmanb@genome.wi.mit.edu>
> > > > > Sr. Software Engineer MIT/Whitehead Inst. Center for Genome Research
> > > > > One Kendall Square, Bldg. 300 / Cambridge, MA 02139-1561 USA
> > > > > phone +1 617  252 1069 / fax +1 617 252 1902
> > > > > 
> > > > > 
> > > > > 
> > > > 
> > > > 
> > > 
> > > 
> > 
> > 
> 
>