URL Class #inSalesforce

URL Class #inSalesforce

Enables access to the base URL used to access your Salesforce org.

Example:

To retrieve the base URL and the full request URL of the current Salesforce server instance. Then a URL pointing to a specific account object is created.  Get components of the base and full URL.

// Insert Account named URLTRIALACCOUNT
Account myAccount = new Account(Name='URLTRIALACCOUNT');
insert myAccount;
// Get base URL.
String sfdcBaseURL = URL.getSalesforceBaseUrl().toExternalForm();
System.debug('Base URL:::::::::: ' + sfdcBaseURL );       
// Get URL for the current request.
String currentRequestURL = URL.getCurrentRequestUrl().toExternalForm();
System.debug('Current request URL:::::::::: ' + currentRequestURL);        
// Create account URL from the base URL.
String accountURL = URL.getSalesforceBaseUrl().toExternalForm() + '/' + myAccount.Id;
System.debug('URL of a particular account:::::::::: ' + accountURL); 
// Get parts of the base URL
System.debug('Host:::::::::: ' + URL.getSalesforceBaseUrl().getHost());   
System.debug('Protocol:::::::::: ' + URL.getSalesforceBaseUrl().getProtocol());
// Get the query string of the current request.
System.debug('Query:::::::::: ' + URL.getCurrentRequestUrl().getQuery());

Reference: https://developer.salesforce.com/docs/atlas.en-us.apexref.meta/apexref/apex_methods_system_url.htm