Hi Dave, > It sounds (from an email that you sent after the one above) that you > are seeing the same behavior on Unidata's server as I see on mine. > Below is a sample of the type of error I'm getting anyway. It occurs > when I try to access NOAA MADIS UrbaNet point data in NetCDF format: > http://funnel.sfsu.edu/data/LDAD/urbanet/200806010_1200.nc > > Note that the error occurs AFTER I added the entry below to the > httpd.conf file and restarted the Web server: > > <Directory "/opt/local_htdocs"> > Options FollowSymLinks Indexes > AllowOverride None > Order allow,deny > Allow from all > Header set Accept-Ranges bytes > </Directory> > > (There's no Content-Length specification; I see from a later email > that you're wondering whether that matters or not, too.) > > In contrast, I don't have any problem reading and plotting the same > data as a local file (from the same server) (see attached JPEG). > > -- Dave Well, I'm back to thinking that Apache by default will do byte range subsetting. Below is what I see if I telnet to your web server and construct a byte range request by hand. The request is just three lines of text: GET /data/LDAD/urbanet/20080610_1200.nc HTTP/1.1 HOST: funnel.sfsu.edu Range: bytes=0-2000 followed by two blank lines and indicates it only wants the first 2001 bytes of the file. The result is a 206 Partial Content which is what we would expect and it looks like the response breaks in the middle (I snipped out a bunch of stuff). When I try the URL (http://funnel.sfsu.edu/data/LDAD/urbanet/20080610_1200.nc) in the netCDF-Java 4.0 ToolsUI, it opens it just fine. It also opens fine in the netCDF-Java 2.2 ToolsUI (which should be the same underlying netCDF-Java library the IDV is using). However, for the dataset URL http://www.unidata.ucar.edu/software/netcdf-java/testdata/20010721.nc, I can telnet to the unidata web server and can get a byte range but it fails in netCDF-Java ToolsUI with the exception shown below. So, I think something other than byte range problems is going on here. John, any ideas? Ethan --------------------------------------------------------------------------- zero.unidata.ucar.edu: telnet funnel.sfsu.edu 80 Trying 22.214.171.124... Connected to funnel.sfsu.edu. Escape character is '^]'. GET /data/LDAD/urbanet/20080610_1200.nc HTTP/1.1 HOST: funnel.sfsu.edu Range: bytes=0-2000 HTTP/1.1 206 Partial Content Date: Thu, 12 Jun 2008 20:11:03 GMT Server: Apache/2.2.8 (Unix) mod_ssl/2.2.8 OpenSSL/0.9.7l DAV/2 PHP/5.2.5 Last-Modified: Tue, 10 Jun 2008 14:19:39 GMT ETag: "5e9620-96c41c-44f509e5214c0" Accept-Ranges: bytes Content-Length: 2001 MS-Author-Via: DAV Content-Range: bytes 0-2000/9880604 Content-Type: application/x-netcdf CDF ... [snip] ... Conventions MADIS surface observations, v1.0title3MADIS - Meteorological Surface - Integrated Mesonet startTime2008-06-10T12:00:00ZendTime2008-06-10T12:59:59ZstationIdVariable stationIdstationDescriptionVariable stationNamestatioMADIS_MESONETnaming_authoritnoaa.govthredds_data_typeStationhistory.revision: 1.1; date: 2007/01/19; author: barth creator_nameMichael F. Barth address@hidden ...[snip]... includes quality-controlled reports from many observing netw Connection to funnel.sfsu.edu closed by foreign host. zero.unidata.ucar.edu: --------------------------------------------------------------------------- Exception in thread "AWT-EventQueue-0" opendap.dap.parser.TokenMgrError: Lexical error at line 1, column 3. Encountered: "<" (60), after : "" at opendap.dap.parser.DDSParserTokenManager.getNextToken(DDSParserTokenManager.java:1085) at opendap.dap.parser.DDSParser.jj_ntk(DDSParser.java:824) at opendap.dap.parser.DDSParser.Dataset(DDSParser.java:93) at opendap.dap.DDS.parse(DDS.java:1063) at opendap.dap.DConnect2$DDSCommand.process(DConnect2.java:452) at opendap.dap.DConnect2.openConnection(DConnect2.java:267) at opendap.dap.DConnect2.getDDS(DConnect2.java:444) at opendap.dap.DConnect2.getDDS(DConnect2.java:424) at ucar.nc2.dods.DODSNetcdfFile.<init>(DODSNetcdfFile.java:178) at ucar.nc2.dataset.NetcdfDataset.openDODS(NetcdfDataset.java:378) at ucar.nc2.dataset.NetcdfDataset.access$000(NetcdfDataset.java:78) at ucar.nc2.dataset.NetcdfDataset$2.open(NetcdfDataset.java:368) at ucar.nc2.NetcdfFileCache.acquire(NetcdfFileCache.java:188) at ucar.nc2.dataset.NetcdfDataset.acquireDODS(NetcdfDataset.java:366) at ucar.nc2.dataset.NetcdfDataset.acquireFile(NetcdfDataset.java:257) at ucar.nc2.ui.ToolsUI.openFile(ToolsUI.java:760) at ucar.nc2.ui.ToolsUI.access$3600(ToolsUI.java:67) Ticket Details =================== Ticket ID: KOO-280301 Department: Support THREDDS Priority: Normal Status: Open
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