HTTP Client VIs help or examples?

Question

I am trying to use the HTTP Client VIs to implement a version of the C# code found HERE. Unfortunately there are no NI examples of how the client VIs are to be used and my various attempts to string them together only seem to result in "Error 42" (LabVIEW: Generic Error) from the POST vi, rather than returning the headers and body text.
I have also tried using DOTNET calls and was at least able to get the login page returned but could not seem to trigger the login.
I switched to the HTTP Client VIs because they offered an alternate hope and I could at least see where to attach a cookie file with them (though a cookie file may not be the same as reserving space for a session cookie).
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Attachments:
HTTP_Client VI.jpg ‏61 KB
DotNet VI.jpg ‏120 KB

Answer 1

Hello Warren,
At this point, your best reference is probably the LabVIEW help documentation on the HTTP client VIs you are using, but here are a few examples that might offer some insight as well:
Easy HTTP Client VIs
https://decibel.ni.com/content/docs/DOC-22383
Reading Coordinates Information from Google Maps Web Services Using HTTP Client VIs
https://decibel.ni.com/content/docs/DOC-20762
Additionally, it looks like there was an issue addressed in LabVIEW 2011 related to the Post VI and Error 42 when downloading large files (see CAR 251094 in the 2011 release notes), which might apply in this situation.
I would recommend contacting our support directly to troubleshoot the error you are seeing, particularly as it is so generic.  If the lack of examples is a hindrance, definitely create a product suggestion at http://digital.ni.com/applications/psc.nsf/default​?OpenForm or by posting on the LabVIEW Idea Exchange (http://forums.ni.com/t5/LabVIEW-Idea-Exchange/idb-​p/labviewideas .)
Tom L.