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Re: [netcdf-java] access opendap site over https

On 3/23/2010 9:20 AM, Jonathan Blower wrote:

Have you tried using http:\server\thredds\dodsC\TRL\temperature.nc and

allowing the https handshake to happen lower down?

The problem is that in this case we need to provide a client
certificate.  If we could get a handle to the HttpClient object (which I
think is used to make HTTP calls under the hood?) we could probably set
it up to perform the handshake.


ok, i think this is orthogonal to the https: issue.
Basically you have to make an HttpClient object and pass it in to various classes. You can use HttpClientManager to create one, or make it yourself. Here is the standarad init sequence used in ToolsUI (GUI):
CredentialsProvider provider = new thredds.ui.UrlAuthenticatorDialog(frame); 
    HttpClient client = HttpClientManager.init(provider, "ToolsUI");
    opendap.dap.DConnect2.setHttpClient(client);
    HTTPRandomAccessFile.setHttpClient(client);
    CdmRemote.setHttpClient(client);
    NetcdfDataset.setHttpClient(client);
    WmsViewer.setHttpClient(client);

caveats:

1) thredds.ui.UrlAuthenticatorDialog is for GUIs only.
2) we are in the midst of switching to use of HttpClient version 4, which will affect the API, since the above HttpClient class is from HttpClient 3.
we are considering how to make this easier to use, so suggestions are welcome. We also have been waiting for this switch to HttpClient 4 to tackle some outstanding problems, eg self-signed certificates, proxy credentials, etc. we expect to switch in CDM release 4.2 (about a month away). not sure how many issues we will have fixed, but at least we'll be on the right code base. 

I will add this info to the document at:

http://www.unidata.ucar.edu/software/netcdf-java/reference/HTTPauthentication.html

which is still useful as background.


Cheers, Jon

-----Original Message-----
From: netcdf-java-bounces@xxxxxxxxxxxxxxxx
[mailto:netcdf-java-bounces@xxxxxxxxxxxxxxxx] On Behalf Of John Caron
Sent: 23 March 2010 15:15
To: Adit Santokhee
Cc: netcdf-java@xxxxxxxxxxxxxxxx
Subject: Re: [netcdf-java] access opendap site over https

On 3/23/2010 9:00 AM, Adit Santokhee wrote:

Hi,

I am trying to access an opendap site over https using a certificate.
However, it is not working:

java.io.FileNotFoundException:
https:\server\thredds\dodsC\TRL\temperature.nc (The filename,
directory name, or volume label syntax is incorrect)
        at java.io.RandomAccessFile.open(Native Method)
        at java.io.RandomAccessFile.<init>(RandomAccessFile.java:212)
        at java.io.RandomAccessFile.<init>(RandomAccessFile.java:98)
        at
ucar.unidata.io.RandomAccessFile.<init>(RandomAccessFile.java:232)
        at ucar.nc2.NetcdfFile.getRaf(NetcdfFile.java:521)
        at ucar.nc2.NetcdfFile.open(NetcdfFile.java:386)
        at


ucar.nc2.dataset.NetcdfDataset.openOrAcquireFile(NetcdfDataset.java:679)

        at
ucar.nc2.dataset.NetcdfDataset.openDataset(NetcdfDataset.java:434)

What would you recommend trying?

Cheers,
Adit


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Have you tried using http:\server\thredds\dodsC\TRL\temperature.nc and
allowing the https handshake to happen lower down?

We are also modifying our code to allow https: in the dataset URLs.

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