fix: add HTTP timeout configuration to prevent indefinite hangs

The UniFi controller HTTP client was created without a timeout, causing
unpoller to hang indefinitely when the controller becomes unresponsive.
This resulted in random stops where polling would cease until the
container was restarted.

Changes:
- Add Timeout field to Controller struct (cnfg.Duration)
- Set default timeout of 60 seconds
- Pass timeout to unifi.Config when creating the client
- Log timeout value on startup for visibility

The timeout can be configured via:
- Config file: timeout = "60s"
- Environment: UP_UNIFI_DEFAULT_TIMEOUT=60s

Fixes issue where container would hang overnight:
  2025/12/22 22:29:27 - Requesting https://unifi/.../stat/sta
  [~2 hour gap - request hung indefinitely]
  2025/12/23 00:17:57 - Unmarshalling Device Type: udm...

pkg/inputunifi/input.go

@@ -11,6 +11,7 @@ import (
 
 	"github.com/unpoller/unifi/v5"
 	"github.com/unpoller/unpoller/pkg/poller"
+	"golift.io/cnfg"
 )
 
 // PluginName is the name of this input plugin.
@@ -21,6 +22,7 @@ const (
 	defaultUser    = "unifipoller"
 	defaultPass    = "unifipoller"
 	defaultSite    = "all"
+	defaultTimeout = 60 * time.Second
 )
 
 // InputUnifi contains the running data.
@@ -47,6 +49,7 @@ type Controller struct {
 	HashPII                 *bool         `json:"hash_pii"                   toml:"hash_pii"                   xml:"hash_pii"                   yaml:"hash_pii"`
 	DropPII                 *bool         `json:"drop_pii"                   toml:"drop_pii"                   xml:"drop_pii"                   yaml:"drop_pii"`
 	SaveSites               *bool         `json:"save_sites"                 toml:"save_sites"                 xml:"save_sites"                 yaml:"save_sites"`
+	Timeout                 cnfg.Duration `json:"timeout"                    toml:"timeout"                    xml:"timeout"                    yaml:"timeout"`
 	CertPaths               []string      `json:"ssl_cert_paths"             toml:"ssl_cert_paths"             xml:"ssl_cert_path"              yaml:"ssl_cert_paths"`
 	User                    string        `json:"user"                       toml:"user"                       xml:"user"                       yaml:"user"`
 	Pass                    string        `json:"pass"                       toml:"pass"                       xml:"pass"                       yaml:"pass"`
@@ -134,6 +137,7 @@ func (u *InputUnifi) getUnifi(c *Controller) error {
 		URL:       c.URL,
 		SSLCert:   certs,
 		VerifySSL: *c.VerifySSL,
+		Timeout:   c.Timeout.Duration,
 		ErrorLog:  u.LogErrorf, // Log all errors.
 		DebugLog:  u.LogDebugf, // Log debug messages.
 	})
@@ -296,6 +300,10 @@ func (u *InputUnifi) setDefaults(c *Controller) { //nolint:cyclop
 	if len(c.Sites) == 0 {
 		c.Sites = []string{defaultSite}
 	}
+
+	if c.Timeout.Duration == 0 {
+		c.Timeout.Duration = defaultTimeout
+	}
 }
 
 // setControllerDefaults sets defaults for the for controllers.
@@ -393,6 +401,10 @@ func (u *InputUnifi) setControllerDefaults(c *Controller) *Controller { //nolint
 		c.DefaultSiteNameOverride = u.Default.DefaultSiteNameOverride
 	}
 
+	if c.Timeout.Duration == 0 {
+		c.Timeout = u.Default.Timeout
+	}
+
 	return c
 }
 

pkg/inputunifi/interface.go

@@ -114,7 +114,7 @@ func (u *InputUnifi) DebugInput() (bool, error) {
 }
 
 func (u *InputUnifi) logController(c *Controller) {
-	u.Logf("   => URL: %s (verify SSL: %v)", c.URL, *c.VerifySSL)
+	u.Logf("   => URL: %s (verify SSL: %v, timeout: %v)", c.URL, *c.VerifySSL, c.Timeout.Duration)
 
 	if len(c.CertPaths) > 0 {
 		u.Logf("   => Cert Files: %s", strings.Join(c.CertPaths, ", "))