better error messages

config.go

@@ -165,27 +165,27 @@ func (config Config) validateResources() *Config {
 	for name := range config.Resources {
 		resourceMappings := config.Resources[name]
 		if len(resourceMappings) == 0 {
-			config.panic("resource needs to have at least one url, see https://j8a.io/docs")
+			config.panic(fmt.Sprintf("resource '%v' needs to have at least one url, see https://j8a.io/docs", name))
 		}
 		for _, r := range resourceMappings {
 			if r.URL.Port <= 1 || r.URL.Port > 65535 {
-				config.panic("resource needs to have port between 0 and 65535")
+				config.panic(fmt.Sprintf("resource '%v' needs to have port between 1 and 65535, was: %v", name, r.URL.Port))
 			}
 			if len(r.URL.Host) == 0 {
 				config.panic("resource needs to have host")
 			} else {
 				ie := validIpAddress(r)
 				he := validHostName(r)
 				if ie != nil && he != nil {
-					config.panic(fmt.Sprintf("resource host needs to be valid DNS name or IP address: %v", r.URL.Host))
+					config.panic(fmt.Sprintf("resource '%v' host needs to be valid DNS name or IP address, was: %v", name, r.URL.Host))
 				}
 			}
 
-			sm := "resource needs to have valid scheme: "
+			sm := "resource '%v' needs to have valid scheme, was: %v"
 			if len(r.URL.Scheme) == 0 {
-				config.panic(sm + r.URL.Scheme)
+				config.panic(fmt.Sprintf(sm, name, r.URL.Scheme))
 			} else if !validScheme(r.URL.Scheme) {
-				config.panic(sm + r.URL.Scheme)
+				config.panic(fmt.Sprintf(sm, name, r.URL.Scheme))
 			}
 		}
 	}

config_test.go

@@ -434,13 +434,15 @@ func TestResourceMappingValidUpstreamResource(t *testing.T) {
 		n string
 		s string
 		h string
-		p uint16
+		p int
 		v bool
 	}{
 		//ports
+		{"invalid port -1", "http", "host.com", -1, false},
 		{"invalid port 0", "http", "host.com", 0, false},
 		{"valid port", "http", "host.com", 80, true},
 		{"invalid port 65535", "http", "host.com", 65535, true},
+		{"invalid port 65536", "http", "host.com", 65536, false},
 
 		//schemes
 		{"valid scheme http", "Http", "host.com", 80, true},
@@ -489,7 +491,7 @@ func TestResourceMappingValidUpstreamResource(t *testing.T) {
 			n string
 			s string
 			h string
-			p uint16
+			p int
 			v bool
 		}{fmt.Sprintf("valid ipv4 %v", i), "http", ipv4, 80, true})
 	}
@@ -499,7 +501,7 @@ func TestResourceMappingValidUpstreamResource(t *testing.T) {
 			n string
 			s string
 			h string
-			p uint16
+			p int
 			v bool
 		}{fmt.Sprintf("valid ipv6 %v", i), "https", ipv6, 443, true})
 	}

stats.go

@@ -178,7 +178,7 @@ UpConn:
 		if c.PID == uint(proc.Pid) {
 			for _, v := range rt.Config.Resources {
 				for _, r := range v {
-					if c.RemotePort == r.URL.Port {
+					if c.RemotePort == uint16(r.URL.Port) {
 						for _, ip := range ips[r.URL.Host] {
 							if ip.Equal(c.RemoteAddress) {
 								d++
@@ -210,7 +210,7 @@ func (rt *Runtime) LookUpResourceIps() map[string][]net.IP {
 	return ips
 }
 
-//log proc samples infinite loop
+// log proc samples infinite loop
 func (rt *Runtime) logRuntimeStats(proc *process.Process) {
 	go func() {
 		for {

upstream.go

@@ -4,14 +4,14 @@ import (
 	"strconv"
 )
 
-//URL describes host mapping
+// URL describes host mapping
 type URL struct {
 	Scheme string
 	Host   string
-	Port   uint16
+	Port   int
 }
 
-//String representation of our URL struct
+// String representation of our URL struct
 func (u URL) String() string {
 	return u.Scheme + "://" + u.Host + ":" + strconv.Itoa(int(u.Port))
 }