Add configuration parameter for listen address

You can now specify :8080, 127.0.0.1:5555 or whatever

README.md

@@ -27,6 +27,7 @@ scp temp-gopher <raspberrypi>:~/somepath
 Create a `config.yml` file like this:
 
 ```
+listenaddr: ":8080" # Address:port to listen on. If not specified, defaults to ":8080"
 baseurl: http://<pihostname>:8080 # Base URL to find the app at. Usually your Pi's IP address or hostname, unless using a reverse proxy
 sensors:
 - id: 28-000008083108 # Id of the DS18b120 sensor

config.go

@@ -24,8 +24,9 @@ type Sensor struct {
 
 // Config contains the applications configuration
 type Config struct {
-	Sensors []Sensor `yaml:"sensors"`
-	BaseURL string   `yaml:"baseurl"`
+	Sensors    []Sensor `yaml:"sensors"`
+	BaseURL    string   `yaml:"baseurl"`
+	ListenAddr string   `yaml:"listenaddr"`
 }
 
 // LoadConfig will loads a file and parses it into a Config struct
@@ -38,6 +39,12 @@ func LoadConfig(path string) (*Config, error) {
 	var config Config
 	yaml.Unmarshal(data, &config)
 
+	// Set a default listen address if not define.
+	if config.ListenAddr == "" {
+		config.ListenAddr = ":8080"
+	}
+
+	// Check for Duplicates
 	ids := make(map[string]bool)
 	aliases := make(map[string]bool)
 	for _, v := range config.Sensors {

config_test.go

@@ -22,8 +22,9 @@ func Test_LoadConfig(t *testing.T) {
 	}
 
 	testConfig := Config{
-		Sensors: []Sensor{testSensor},
-		BaseURL: "https://foo.bar",
+		Sensors:    []Sensor{testSensor},
+		BaseURL:    "https://foo.bar",
+		ListenAddr: "127.0.0.1:8080",
 	}
 
 	loadedConfig, err := LoadConfig("tests/test_config.yml")

tests/duplicate_alias.yml

@@ -22,3 +22,4 @@ sensors:
   coolminutes: 10
   verbose: true
 baseurl: https://foo.bar
+listenaddr: 127.0.0.1:8080

tests/duplicate_id.yml

@@ -22,3 +22,4 @@ sensors:
   coolminutes: 10
   verbose: true
 baseurl: https://foo.bar
+listenaddr: 127.0.0.1:8080

tests/test_config.yml

@@ -11,3 +11,4 @@ sensors:
   coolminutes: 10
   verbose: true
 baseurl: https://foo.bar
+listenaddr: 127.0.0.1:8080

web.go

@@ -118,7 +118,7 @@ func RunWeb(configpath string, sc <-chan State, wg *sync.WaitGroup) {
 	// Launch the web server
 	r := SetupRouter(config, &states)
 	srv := &http.Server{
-		Addr:    ":8080",
+		Addr:    config.ListenAddr,
 		Handler: r,
 	}