allows user to specify a custom admin port

config/configuration.go

@@ -17,6 +17,7 @@ import (
 type Config struct {
 	PIHoleProtocol string        `config:"pihole_protocol"`
 	PIHoleHostname string        `config:"pihole_hostname"`
+	PIHolePort     uint16        `config:"pihole_port"`
 	PIHolePassword string        `config:"pihole_password"`
 	PIHoleApiToken string        `config:"pihole_api_token"`
 	Port           string        `config:"port"`
@@ -27,6 +28,7 @@ func getDefaultConfig() *Config {
 	return &Config{
 		PIHoleProtocol: "http",
 		PIHoleHostname: "127.0.0.1",
+		PIHolePort:     80,
 		PIHolePassword: "",
 		PIHoleApiToken: "",
 		Port:           "9617",

go.sum

@@ -70,6 +70,7 @@ github.com/golang/mock v1.1.1/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfb
 github.com/golang/mock v1.2.0/go.mod h1:oTYuIxOrZwtPieC+H1uAHpcLFnEyAGVDL/k47Jfbm0A=
 github.com/golang/protobuf v1.2.0 h1:P3YflyNX/ehuJFLhxviNdFxQPkGK5cDcApsge1SqnvM=
 github.com/golang/protobuf v1.2.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
+github.com/golang/protobuf v1.3.1 h1:YF8+flBXS5eO826T4nzqPrxfhQThhXl0YzfuUPu4SBg=
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/snappy v0.0.0-20170215233205-553a64147049/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
 github.com/golang/snappy v0.0.0-20180518054509-2e65f85255db/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
@@ -262,6 +263,7 @@ golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn
 golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
 golang.org/x/net v0.0.0-20190503192946-f4e77d36d62c h1:uOCk1iQW6Vc18bnC13MfzScl+wdKBmM9Y9kU7Z83/lw=
 golang.org/x/net v0.0.0-20190503192946-f4e77d36d62c/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859 h1:R/3boaszxrf1GEUWTVDzSKVwLmSJpwZ1yqXm8j0v2QI=
 golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
 golang.org/x/oauth2 v0.0.0-20180821212333-d2e6202438be/go.mod h1:N/0e6XlmueqKjAGxoOufVs8QHGRruUQn6yWY3a++T0U=
 golang.org/x/oauth2 v0.0.0-20190226205417-e64efc72b421/go.mod h1:gOpvHmFTYa4IltrdGE7lF6nIHvwfUNPOp7c8zoXwtLw=

internal/pihole/client.go

@@ -16,8 +16,8 @@ import (
 )
 
 var (
-	loginURLPattern = "%s://%s/admin/index.php?login"
+	loginURLPattern = "%s://%s:%d/admin/index.php?login"
-	statsURLPattern = "%s://%s/admin/api.php?summaryRaw&overTimeData&topItems&recentItems&getQueryTypes&getForwardDestinations&getQuerySources&jsonForceObject"
+	statsURLPattern = "%s://%s:%d/admin/api.php?summaryRaw&overTimeData&topItems&recentItems&getQueryTypes&getForwardDestinations&getQuerySources&jsonForceObject"
 )
 
 // Client struct is a PI-Hole client to request an instance of a PI-Hole ad blocker.
@@ -26,13 +26,14 @@ type Client struct {
 	interval   time.Duration
 	protocol   string
 	hostname   string
+	port       uint16
 	password   string
 	sessionID  string
 	apiToken   string
 }
 
 // NewClient method initializes a new PI-Hole client.
-func NewClient(protocol, hostname, password, apiToken string, interval time.Duration) *Client {
+func NewClient(protocol, hostname string, port uint16, password, apiToken string, interval time.Duration) *Client {
 	if protocol != "http" && protocol != "https" {
 		log.Printf("protocol %s is invalid. Must be http or https.", protocol)
 		os.Exit(1)
@@ -41,6 +42,7 @@ func NewClient(protocol, hostname, password, apiToken string, interval time.Dura
 	return &Client{
 		protocol: protocol,
 		hostname: hostname,
+		port:     port,
 		password: password,
 		apiToken: apiToken,
 		interval: interval,
@@ -109,7 +111,7 @@ func (c *Client) setMetrics(stats *Stats) {
 }
 
 func (c *Client) getPHPSessionID() (sessionID string) {
-	loginURL := fmt.Sprintf(loginURLPattern, c.protocol, c.hostname)
+	loginURL := fmt.Sprintf(loginURLPattern, c.protocol, c.hostname, c.port)
 	values := url.Values{"pw": []string{c.password}}
 
 	req, err := http.NewRequest("POST", loginURL, strings.NewReader(values.Encode()))
@@ -138,7 +140,7 @@ func (c *Client) getPHPSessionID() (sessionID string) {
 func (c *Client) getStatistics() *Stats {
 	var stats Stats
 
-	statsURL := fmt.Sprintf(statsURLPattern, c.protocol, c.hostname)
+	statsURL := fmt.Sprintf(statsURLPattern, c.protocol, c.hostname, c.port)
 
 	if c.isUsingApiToken() {
 		statsURL = fmt.Sprintf("%s&auth=%s", statsURL, c.apiToken)

main.go

@@ -26,14 +26,14 @@ func main() {
 
 	metrics.Init()
 
-	initPiHoleClient(conf.PIHoleProtocol, conf.PIHoleHostname, conf.PIHolePassword, conf.PIHoleApiToken, conf.Interval)
+	initPiHoleClient(conf.PIHoleProtocol, conf.PIHoleHostname, conf.PIHolePort, conf.PIHolePassword, conf.PIHoleApiToken, conf.Interval)
 	initHttpServer(conf.Port)
 
 	handleExitSignal()
 }
 
-func initPiHoleClient(protocol, hostname, password, apiToken string, interval time.Duration) {
+func initPiHoleClient(protocol, hostname string, port uint16, password, apiToken string, interval time.Duration) {
-	client := pihole.NewClient(protocol, hostname, password, apiToken, interval)
+	client := pihole.NewClient(protocol, hostname, port, password, apiToken, interval)
 	go client.Scrape()
 }