fix: added comments in getIP and client/config.go

Author: ishanjain28

client/config.go

@@ -60,6 +60,8 @@ type Config struct {
 	// Expected format is {protocol}://{host}:{port}, e.g. tcp://8.8.8.8:53
 	DNSResolver string `yaml:"dns-resolver,omitempty"`
 
+	// DNSResolverConfig is parsed DNSResolver
+	// We do this to avoid parsing DNSResolver every time it is needed
 	DNSResolverConfig *DNSResolverConfig `yaml:"-"`
 
 	// OAuth2Config is the OAuth2 configuration used for the client.

config/endpoint/endpoint.go

@@ -433,9 +433,9 @@ func (e *Endpoint) getParsedBody() string {
 }
 
 func (e *Endpoint) getIP(result *Result) {
-
 	resolver := net.DefaultResolver
-
+	// Create a custom DNS resolver for use in looking up the IP address
+	// if the configuration specifies a custom DNS resolver address
 	if e.ClientConfig.HasCustomDNSResolver() {
 		dnsResolver := e.ClientConfig.DNSResolverConfig
 		resolver = &net.Resolver{