Some HTTP servers (i.e. TDS) report a 0 value for Content-Length header.

[cofinoa]

This workaround guess the real value size, making a request with
a range heaer.

[DennisHeimbigner]

Can you tell me what problems arise from the 0 length value?
=Dennis Heimbigner
Unidata

cofinoa wrote:

This commit guess the real value for the URL size, making a request with
a range.
You can merge this Pull Request by running:

git pull https://github.com/cofinoa/thredds target-4.3.22

Or you can view, comment on it, or merge it online at:

#66

-- Commit Summary --

• Some HTTP servers (i.e. TDS) a 0 value for Content-Length header.

-- File Changes --

M cdm/src/main/java/ucar/unidata/io/http/HTTPRandomAccessFile.java (8)

-- Patch Links --

https://github.com/Unidata/thredds/pull/66.patch
https://github.com/Unidata/thredds/pull/66.diff

---

Reply to this email directly or view it on GitHub:
#66

[cofinoa]

For Example this URL
http:https://opendap.bom.gov.au:8080/thredds/fileServer/poama/m24a/hindcasts/e00/dag_20111211.nc

is reporting a Content-Length value of 0, making the netcdf-java failing
to open it. This a excerpt from the ToolsUI's exception trying to open
the dataset:
java.io.EOFException: Reading
http:https://opendap.bom.gov.au:8080/thredds/fileServer/poama/m24a/hindcasts/e00/dag_20111211.nc
at 0 file length = 0
at ucar.unidata.io.RandomAccessFile.readFully(RandomAccessFile.java:747)
at ucar.unidata.io.RandomAccessFile.readFully(RandomAccessFile.java:726)
at ucar.nc2.grib.grib2.Grib2Iosp.isValidFile(Grib2Iosp.java:271)
at ucar.nc2.NetcdfFile.open(NetcdfFile.java:860)
at ucar.nc2.NetcdfFile.open(NetcdfFile.java:496)
........................................

With this workaround, the netcdf-java is able to process the dataset

Browsers or wget and curl tools are able to guess the size of the remote
file and download it with no problem.

Regards

Antonio

P.S: This a common issue with the HTTP service from TDS which I have
seen before but I haven't been able to track down the bug

El 03/08/2014 22:42, DennisHeimbigner escribió:

Can you tell me what problems arise from the 0 length value?
=Dennis Heimbigner
Unidata

cofinoa wrote:

This commit guess the real value for the URL size, making a request with
a range.
You can merge this Pull Request by running:

git pull https://github.com/cofinoa/thredds target-4.3.22

Or you can view, comment on it, or merge it online at:

#66

-- Commit Summary --

• Some HTTP servers (i.e. TDS) a 0 value for Content-Length header.

-- File Changes --

M cdm/src/main/java/ucar/unidata/io/http/HTTPRandomAccessFile.java (8)

-- Patch Links --

https://github.com/Unidata/thredds/pull/66.patch
https://github.com/Unidata/thredds/pull/66.diff

---

Reply to this email directly or view it on GitHub:
#66

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