From dbe57b21e5e9bb46129d471537eee85ef117c730 Mon Sep 17 00:00:00 2001
From: Ingo Oeser <ingo@jimdo.com>
Date: Wed, 8 Jul 2015 10:35:49 +0200
Subject: [PATCH] hacked up support for https URLs

since many real life services are behind SSL only
---
 main.go         |  3 +++
 service.go      |  3 +++
 string_array.go | 17 +++++++++++++++++
 3 files changed, 23 insertions(+)
 create mode 100644 string_array.go

diff --git a/main.go b/main.go
index bdf9503..0d0595e 100644
--- a/main.go
+++ b/main.go
@@ -12,6 +12,7 @@ import (
 )
 
 var (
+	urls     = &StringArray{}
 	interval = flag.Duration("i", 5*time.Second, "Polling interval")
 	portsArg = flag.String("ports", "", "Ports for accessing services expvars (start-end,port2,port3)")
 	varsArg  = flag.String("vars", "mem:memstats.Alloc,mem:memstats.Sys,mem:memstats.HeapAlloc,mem:memstats.HeapInuse,memstats.EnableGC,memstats.NumGC,duration:memstats.PauseTotalNs", "Vars to monitor (comma-separated)")
@@ -20,6 +21,7 @@ var (
 )
 
 func main() {
+	flag.Var(urls, "url", "urls to poll for expvars")
 	flag.Usage = Usage
 	flag.Parse()
 
@@ -31,6 +33,7 @@ func main() {
 			ports = append(ports, port)
 		}
 	}
+	ports = append(ports, *urls...)
 	if len(ports) == 0 {
 		fmt.Fprintln(os.Stderr, "no ports specified. Use -ports arg to specify ports of Go apps to monitor")
 		Usage()
diff --git a/service.go b/service.go
index ca5420a..a7681f7 100644
--- a/service.go
+++ b/service.go
@@ -112,6 +112,9 @@ func guessValue(value *jason.Value) interface{} {
 //
 // If host is not specified, 'localhost' is used.
 func (s Service) Addr() string {
+	if strings.HasPrefix(s.Port, "https://") {
+		return fmt.Sprintf("%s%s", s.Port, ExpvarsURL)
+	}
 	// Try as port only
 	_, err := strconv.Atoi(s.Port)
 	if err == nil {
diff --git a/string_array.go b/string_array.go
new file mode 100644
index 0000000..666789c
--- /dev/null
+++ b/string_array.go
@@ -0,0 +1,17 @@
+package main
+
+import (
+	"strings"
+)
+
+type StringArray []string
+
+func (a *StringArray) Set(s string) error {
+	s = strings.TrimSuffix(s, "/debug/vars")
+	*a = append(*a, s)
+	return nil
+}
+
+func (a *StringArray) String() string {
+	return strings.Join(*a, ",")
+}