From 05ac08d1b0f87de02d5d6c3144673994f2e2cb4b Mon Sep 17 00:00:00 2001
From: Kali Kaneko <kali@leap.se (leap communications)>
Date: Thu, 13 Jun 2019 12:43:30 +0200
Subject: some error handling

---
 Makefile            |  8 ++++++++
 main.go             | 32 ++++++++++++++++++++++++++++++--
 public/2            |  1 +
 test/1/configs.json |  1 +
 test/1/service.json |  1 +
 5 files changed, 41 insertions(+), 2 deletions(-)
 create mode 100644 Makefile
 create mode 120000 public/2
 create mode 100644 test/1/configs.json
 create mode 100644 test/1/service.json

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..918b612
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,8 @@
+build:
+	go build
+demo:
+	./vpnweb -caCrt test/files/ca.crt -caKey test/files/ca.key
+clean:
+	rm -f public/1/*
+populate:
+	cp test/1/* public/1/
diff --git a/main.go b/main.go
index 233a26d..ffa9c5c 100644
--- a/main.go
+++ b/main.go
@@ -2,12 +2,21 @@ package main
 
 import (
 	"flag"
+	"fmt"
+	"log"
 	"net/http"
+	"os"
+	"strconv"
 )
 
 const keySize = 2048
 const expiryDays = 28
 
+func errExit(errmsg string) {
+	fmt.Printf("ERROR: %s\n", errmsg)
+	os.Exit(1)
+}
+
 type certHandler struct {
 	cainfo caInfo
 }
@@ -16,15 +25,34 @@ func (ch *certHandler) certResponder(w http.ResponseWriter, r *http.Request) {
 	ch.cainfo.CertWriter(w)
 }
 
+func doFilesSanityCheck(caCrt string, caKey string) {
+	if _, err := os.Stat(caCrt); os.IsNotExist(err) {
+		errExit("cannot find caCrt file")
+	}
+	if _, err := os.Stat(caKey); os.IsNotExist(err) {
+		errExit("cannot find caKey file")
+	}
+}
+
 func main() {
 	var caCrt = flag.String("caCrt", "", "path to the CA public key")
 	var caKey = flag.String("caKey", "", "path to the CA private key")
+	var port = flag.Int("port", 8000, "port where the server will listen")
 
 	flag.Parse()
 
+	if *caCrt == "" {
+		errExit("missing caCrt parameter")
+	}
+	if *caKey == "" {
+		errExit("missing caKey parameter")
+	}
+
+	doFilesSanityCheck(*caCrt, *caKey)
+
 	ci := newCaInfo(*caCrt, *caKey)
 	ch := certHandler{ci}
 
-	http.HandleFunc("/cert", ch.certResponder)
-	http.ListenAndServe(":8000", nil)
+	http.HandleFunc("/1/cert", ch.certResponder)
+	log.Fatal(http.ListenAndServe(":"+strconv.Itoa(*port), nil))
 }
diff --git a/public/2 b/public/2
new file mode 120000
index 0000000..56a6051
--- /dev/null
+++ b/public/2
@@ -0,0 +1 @@
+1
\ No newline at end of file
diff --git a/test/1/configs.json b/test/1/configs.json
new file mode 100644
index 0000000..2eb61a6
--- /dev/null
+++ b/test/1/configs.json
@@ -0,0 +1 @@
+{"services":{"eip":"/1/configs/eip-service.json"}}
diff --git a/test/1/service.json b/test/1/service.json
new file mode 100644
index 0000000..fa8a8cb
--- /dev/null
+++ b/test/1/service.json
@@ -0,0 +1 @@
+{"name":"anonymous","description":"anonymous access to the VPN","eip_rate_limit":false}
\ No newline at end of file
-- 
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