Configure CORS to allow any origin access to your WebVI resources.
This CORS configuration is the least secure configuration. Any origin can access your web
service and application resources. For example, any web page the browser visits could run
scripts that make requests to the web service.
Note
The following content only applies to LabVIEW Web Services deployed to
the LabVIEW Application Web Server. NI recommends deploying LabVIEW Web Services to the NI Web
Server instead.
What to Use
You can find the Web Services API on the Connectivity palette in LabVIEW.
Note
LabVIEW NXG does not support creating web
services.
- LabVIEW Web Service Request
- Set HTTP Header
What to Do
Create the following
diagram in a Web Resources VI to configure a LabVIEW Web Service to allow CORS from any
origin.
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A new Web Resources VI automatically adds the
LabVIEW Web Service Request class to the block diagram and
terminal pane. |
 |
Set HTTP Header sets the HTTP header value in response to a
request.
Use the header
Access-Control-Allow-Origin to indicate if the origin
making the request can access the response of your Web Service VI.
Use wildcard (*) as the header
value to allow any origin to access your WebVI resource.
|
Troubleshooting
If you encounter errors, try the following
troubleshooting strategy:
- Verify the header and header value
are correct.
