Make HTTP timeout configurable, raise default to 30s

cli/main.go

@@ -37,6 +37,7 @@ type Settings struct {
 	Debug    bool   `json:"debug"`
 	AcID     string `json:"acId"`
 	Campus   bool   `json:"campusOnly"`
+	Timeout  int    `json:"timeout"`
 }
 
 var logger = loggo.GetLogger("auth-thu")
@@ -99,7 +100,14 @@ func mergeCliSettings(c *cli.Command) {
 		merged.AcID = settings.AcID
 	}
 	merged.Campus = settings.Campus || c.Bool("campus-only")
+	merged.Timeout = c.Int("timeout")
+	if !c.IsSet("timeout") && settings.Timeout != 0 {
+		merged.Timeout = settings.Timeout
+	}
 	settings = merged
+	if settings.Timeout > 0 {
+		libauth.HttpTimeout = time.Duration(settings.Timeout) * time.Second
+	}
 	logger.Debugf("Settings Username: \"%s\"\n", settings.Username)
 	logger.Debugf("Settings Ip: \"%s\"\n", settings.Ip)
 	logger.Debugf("Settings Host: \"%s\"\n", settings.Host)
@@ -114,6 +122,7 @@ func mergeCliSettings(c *cli.Command) {
 	logger.Debugf("Settings Debug: %t\n", settings.Debug)
 	logger.Debugf("Settings AcID: \"%s\"\n", settings.AcID)
 	logger.Debugf("Settings Campus: %t\n", settings.Campus)
+	logger.Debugf("Settings Timeout: %d\n", settings.Timeout)
 }
 
 func requestUser() (err error) {
@@ -424,6 +433,7 @@ func main() {
 			&cli.StringFlag{Name: "config-file", Aliases: []string{"c"}, Usage: "`path` to your config file, default ~/.auth-thu"},
 			&cli.StringFlag{Name: "hook-success", Usage: "command line to be executed in shell after successful login/out"},
 			&cli.IntFlag{Name: "online-interval", Aliases: []string{"I"}, Usage: "the interval between each keepAlive request (s)", Value: 3},
+			&cli.IntFlag{Name: "timeout", Aliases: []string{"t"}, Usage: "HTTP request timeout in seconds for the auth server", Value: 2},
 			&cli.BoolFlag{Name: "daemonize", Aliases: []string{"D"}, Usage: "run without reading username/password from standard input; less log"},
 			&cli.BoolFlag{Name: "debug", Usage: "print debug messages"},
 			&cli.BoolFlag{Name: "help, h", Usage: "print the help"},

libauth/requests.go

@@ -16,6 +16,10 @@ import (
 
 var logger = loggo.GetLogger("libauth")
 
+// HttpTimeout is the timeout used for all HTTP requests issued by libauth.
+// It can be overridden by the caller (e.g. the CLI) before making requests.
+var HttpTimeout = 2 * time.Second
+
 func extractJSONFromJSONP(jsonp, callbackName string) (string, error) {
 	l := len(callbackName)
 	if len(jsonp) < l+2 {
@@ -90,7 +94,7 @@ func GetJSON(baseUrl string, params url.Values) (string, error) {
 	const CB = "C_a_l_l_b_a_c_k"
 	params.Set("callback", CB)
 	var netClient = &http.Client{
-		Timeout: time.Second * 2,
+		Timeout: HttpTimeout,
 	}
 	url := baseUrl + "?" + params.Encode()
 	logger.Debugf("GET \"%s\"\n", url)
@@ -109,7 +113,7 @@ func GetJSON(baseUrl string, params url.Values) (string, error) {
 func IsOnline(host *UrlProvider, acID string) (online bool, err error, username string) {
 	logger.Debugf("Check if online\n")
 	var netClient = &http.Client{
-		Timeout: time.Second * 2,
+		Timeout: HttpTimeout,
 	}
 	online = false
 	params := url.Values{
@@ -174,7 +178,7 @@ func GetNasID(IP, user, password string) (nasID string, err error) {
 func GetAcID(V6 bool) (acID string, err error) {
 	logger.Debugf("Get AC ID\n")
 	var netClient = &http.Client{
-		Timeout: time.Second * 2,
+		Timeout: HttpTimeout,
 		CheckRedirect: func(req *http.Request, via []*http.Request) error {
 			logger.Debugf("REDIRECT \"%v\"\n", req.URL)
 			return errors.New("should not redirect")