HTTP proxy written in Go to replace Tinyproxy (#269)

internal/settings/httpproxy.go

@@ -0,0 +1,71 @@
+package settings
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/qdm12/gluetun/internal/params"
+)
+
+// HTTPProxy contains settings to configure the HTTP proxy.
+type HTTPProxy struct { //nolint:maligned
+	Enabled  bool
+	Port     uint16
+	User     string
+	Password string
+	Stealth  bool
+	Log      bool
+}
+
+func (h *HTTPProxy) String() string {
+	if !h.Enabled {
+		return "HTTP Proxy settings: disabled"
+	}
+	auth, log, stealth := disabled, disabled, disabled
+	if h.User != "" {
+		auth = enabled
+	}
+	if h.Log {
+		log = enabled
+	}
+	if h.Stealth {
+		stealth = enabled
+	}
+	settingsList := []string{
+		"HTTP proxy settings:",
+		fmt.Sprintf("Port: %d", h.Port),
+		"Authentication: " + auth,
+		"Stealth: " + stealth,
+		"Log: " + log,
+	}
+	return strings.Join(settingsList, "\n |--")
+}
+
+// GetHTTPProxySettings obtains HTTPProxy settings from environment variables using the params package.
+func GetHTTPProxySettings(paramsReader params.Reader) (settings HTTPProxy, err error) {
+	settings.Enabled, err = paramsReader.GetHTTPProxy()
+	if err != nil || !settings.Enabled {
+		return settings, err
+	}
+	settings.Port, err = paramsReader.GetHTTPProxyPort()
+	if err != nil {
+		return settings, err
+	}
+	settings.User, err = paramsReader.GetHTTPProxyUser()
+	if err != nil {
+		return settings, err
+	}
+	settings.Password, err = paramsReader.GetHTTPProxyPassword()
+	if err != nil {
+		return settings, err
+	}
+	settings.Stealth, err = paramsReader.GetHTTPProxyStealth()
+	if err != nil {
+		return settings, err
+	}
+	settings.Log, err = paramsReader.GetHTTPProxyLog()
+	if err != nil {
+		return settings, err
+	}
+	return settings, nil
+}