A named credential specifies the URL of a callout endpoint and its required authentication parameters in one definition. To simplify the setup of authenticated callouts,…
HttpRequest req = new HttpRequest(); req.setEndpoint('callout:My_Named_Credential/some_path'); req.setMethod('GET'); Http http = new Http(); HTTPResponse res = http.send(req); System.debug(res.getBody());
HTTPCalloutService service= new HTTPCalloutService('GoatOrg'); System.debug(service.getRequest()); String query ='SELECT+Name+From+Student__c'; service.setURlParameter('q',query); System.debug(service.getRequest()); HTTPResponse response=service.sendRequest(); //System.debug(response.getstatuscode()); //System.debug(response.getHeader('Location')); System.debug(response.getBody());A named credential is a logical entity that can be thought of as a named connection to an external system. A developer can write Apex to make a callout to an external system. With named credentials, there’s no need to embed the physical URL into the Apex code and manage authentication tokens in unencrypted data stores. Instead, a variable in the code allows an administrator to provision the physical endpoint at deployment time and manage user credentials in the organization's encrypted credential store. The named credential URL is resolved at runtime to the configured physical endpoint, along with the credentials for the authorized user performing the callout. Named credentials support different types, with a default of Secure Endpoint. Advanced use cases can benefit from storing custom parameters, which are also supported. A parameter is essentially a name-value pair to capture arbitrary metadata, and the parameter values are stored securely. See the API documentation for more details. The named credential type can be one of the following. SecuredEndpoint - The named credential includes an endpoint’s transport protocol as secured through transport layer security (TLS). Legacy - A legacy named credential specifies the URL of a callout endpoint and its required authentication parameters in one definition.
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