I have a webservice class that will be in a managed package and distributed to multiple clients. The class currently has a variable with the hardcoded value of the server it's hitting.
The problem: the server will be different for each client, so a hardcoded value will not work.
I figured since each client will have to add their server to their remote site settings, the easiest way might be to grab the correct URL from their setting. Is this possible? Or is there another "right" way to accomplish this? Thanks
The best way I've found to save configuration values is to use Apex Custom Settings. To set the Remote Site settings programmatically you could use the Metadata API.
来源：https://stackoverflow.com/questions/6832695/reference-a-remote-site-setting-url-in-apex-class