Re: FW: Java Error

1) What version of netcdf-java library? An older version requires Accept-Ranges
header, latest
version (4.0.31) will tolerate not seeing it.

2) I have seen a previous case where some intermediary was stripping HTTP
headers (!) You might test
in the following way:

1. Add Live HTTP Headers plug-in to Firefox.

2. Try the URL in firefox:
http://motherlode.ucar.edu:8080/thredds/fileServer/fmrc/NCEP/NAM/Alaska_11km/files/NAM_Alaska_11km_20090204_1200.grib2

You should get something the following in the Live Headers window:

http://motherlode.ucar.edu:8080/thredds/fileServer/fmrc/NCEP/NAM/Alaska_11km/files/NAM_Alaska_11km_20090204_1200.grib2

GET
/thredds/fileServer/fmrc/NCEP/NAM/Alaska_11km/files/NAM_Alaska_11km_20090204_1200.grib2
HTTP/1.1
Host: motherlode.ucar.edu:8080
User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.2; en-US; rv:1.9.0.6)
Gecko/2009011913
Firefox/3.0.6 (.NET CLR 3.5.30729)
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-us,en;q=0.5
Accept-Encoding: gzip,deflate
Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7
Keep-Alive: 300
Connection: keep-alive

HTTP/1.x 200 OK
Server: Apache-Coyote/1.1
Last-Modified: Wed, 04 Feb 2009 14:56:37 GMT
Accept-Ranges: bytes
Content-Type: application/octet-stream
Transfer-Encoding: chunked
Content-Encoding: gzip
Vary: Accept-Encoding
Date: Mon, 09 Feb 2009 20:44:20 GMT

In particular you should see

  Accept-Ranges: bytes

----------------------------------------------------------


David Stuebe wrote:
>
> As an example, I just hit this file on thredds motherlode and I get the
> same response:
>
> HTTPServer:http://motherlode.ucar.edu:8080/thredds/fileServer/fmrc/NCEP/
> NAM/Alaska_11km/files/NAM_Alaska_11km_20090204_1200.grib2
>
> java.io.IOException: Server does not support byte Ranges
>       at
> ucar.unidata.io.http.HTTPRandomAccessFile.<init>(HTTPRandomAccessFile.ja
> va:123)
>       at
> ucar.unidata.io.http.HTTPRandomAccessFile.<init>(HTTPRandomAccessFile.ja
> va:94)
>       at ucar.nc2.NetcdfFile.getRaf(NetcdfFile.java:441)
>       at ucar.nc2.NetcdfFile.open(NetcdfFile.java:347)
>       at
> ucar.nc2.dataset.NetcdfDataset.openOrAcquireFile(NetcdfDataset.java:622)
>       at
> ucar.nc2.dataset.NetcdfDataset.openFile(NetcdfDataset.java:500)
>       at ucar.nc2.ui.ToolsUI$NCdumpPanel.run(ToolsUI.java:1214)
>       at ucar.nc2.ui.ToolsUI$GetDataTask.run(ToolsUI.java:3098)
>       at java.lang.Thread.run(Unknown Source)
>
>
>
>
> -----Original Message-----
> From: John Caron [mailto:address@hidden]
> Sent: Wednesday, February 04, 2009 12:21 PM
> To: David Stuebe
> Cc: Jennifer Read; Guy De Wardener; address@hidden
> Subject: Re: FW: Java Error
>
> see
>
> http://www.unidata.ucar.edu/software/netcdf-java/reference/HTTPservice.h
> tml
>
> David Stuebe wrote:
>> Hi John
>>
>> CC Jenn, Guy
>>
>> I have run into a problem accessing files on HTTP servers using netcdf
>
>> Java. I get this error: Server does not support byte Ranges
>>
>> The strange part is that the error only occurs when accessing the
>> files from ASA. Specifically when I take my laptop home and make the
>> same NETCDF JAVA request from my house it works fine. Similarly local
>> files, or files hosted inside the ASA network are fine. There is
>> something funny about the fire wall or our service provider but we
>> can't seem to figure out what. Have you run into this before?
>>
>> Let me know if you have any ideas
>>
>> Thanks
>>
>> David Stuebe
>>
>> *From:* Jennifer Read
>> *Sent:* Tuesday, February 03, 2009 10:33 AM
>> *To:* Jennifer Read; Guy De Wardener
>> *Cc:* David Stuebe
>> *Subject:* RE: Java Error
>>
>> We tested with this address:
>>
> http://science.whoi.edu/users/kestons/redtide_2005_hindcast/OUT/avg_gom_
> 0014.nc
>> using java NetCDF (One ring to bind them).
>>
>> *From:* Jennifer Read
>> *Sent:* Tuesday, February 03, 2009 10:22 AM
>> *To:* Guy De Wardener
>> *Cc:* David Stuebe
>> *Subject:* Java Error
>>
>> So, Dave is getting this error:
>>
>> java.io.IOException: Server does not support byte Ranges
>>
>> at
>>
> ucar.unidata.io.http.HTTPRandomAccessFile.<init>(HTTPRandomAccessFile.ja
> va:123)
>> at
>>
> ucar.unidata.io.http.HTTPRandomAccessFile.<init>(HTTPRandomAccessFile.ja
> va:94)
>> at ucar.nc2.NetcdfFile.getRaf(NetcdfFile.java:441)
>>
>> at ucar.nc2.NetcdfFile.open(NetcdfFile.java:347)
>>
>> at
>>
> ucar.nc2.dataset.NetcdfDataset.openOrAcquireFile(NetcdfDataset.java:622)
>> at ucar.nc2.dataset.NetcdfDataset.openFile(NetcdfDataset.java:500)
>>
>> at ucar.nc2.ui.ToolsUI$NCdumpPanel.run(ToolsUI.java:1214)
>>
>> at ucar.nc2.ui.ToolsUI$GetDataTask.run(ToolsUI.java:3098)
>>
>> at java.lang.Thread.run(Unknown Source)
>>
>> When he tries to connect from inside ASA to another source. It works
>> outside (at home) and it works inside if he's connecting inside. I'm
>> having him see what happens if he uses wireless and tries to connect.
>> It isn't a firewall issue- there have been no firewall changes in the
>> past long time.
>>