[core] Adding toggle for CORS, GZIP in admin/cms configuration (#30)

This PR enables admins to disable/enable CORS and GZIP from within the admin CMS configuration page. Both are enabled by default.

Note: currently, the GZIP implementation is 100% on the fly, for every qualifying API endpoint request. This could add significant CPU usage, but dramatically decreases bandwidth. Will be considering other better implementations, but for now YMMV.

Possible optimizations:
- pooling gzip Writers vs. creating a new one for each response
- caching gzipped responses (in memory? on disk?) 
- enforcing size threshold (only gzip content larger than N bytes) 

2 files changed, 28 insertions, 23 deletions

diff --git a/cmd/ponzu/main.go b/cmd/ponzu/main.go
index 90ad613..e90d318 100644
--- a/cmd/ponzu/main.go
+++ b/cmd/ponzu/main.go
@@ -80,7 +80,7 @@ func main() {
 
 	case "new":
 		if len(args) < 2 {
-			fmt.Println(usage)
+			fmt.Println(usageNew)
 			os.Exit(0)
 		}
 
@@ -91,15 +91,22 @@ func main() {
 		}
 
 	case "generate", "gen", "g":
-		if len(args) < 2 {
-			flag.PrintDefaults()
+		if len(args) < 3 {
+			fmt.Println(usageGenerate)
 			os.Exit(0)
 		}
 
-		err := generateContentType(args[1:])
-		if err != nil {
-			fmt.Println(err)
-			os.Exit(1)
+		// check what we are asked to generate
+		switch args[1] {
+		case "content", "c":
+			err := generateContentType(args[2:])
+			if err != nil {
+				fmt.Println(err)
+				os.Exit(1)
+			}
+		default:
+			msg := fmt.Sprintf("Generator '%s' is not implemented.", args[1])
+			fmt.Println(msg)
 		}
 
 	case "build":
@@ -163,8 +170,10 @@ func main() {
 			for i := range services {
 				if services[i] == "api" {
 					api.Run()
+
 				} else if services[i] == "admin" {
 					admin.Run()
+
 				} else {
 					fmt.Println("To execute 'ponzu serve', you must specify which service to run.")
 					fmt.Println("$ ponzu --help")
@@ -176,7 +185,7 @@ func main() {
 		// save the https port the system is listening on
 		err := db.PutConfig("https_port", fmt.Sprintf("%d", httpsport))
 		if err != nil {
-			log.Fatalln("System failed to save config. Please try to run again.")
+			log.Fatalln("System failed to save config. Please try to run again.", err)
 		}
 
 		// cannot run production HTTPS and development HTTPS together
@@ -193,16 +202,18 @@ func main() {
 			fmt.Println("Enabling HTTPS...")
 
 			go tls.Enable()
-			fmt.Printf("Server listening on :%s for HTTPS requests...\n", db.ConfigCache("https_port"))
+			fmt.Printf("Server listening on :%s for HTTPS requests...\n", db.ConfigCache("https_port").(string))
 		}
 
 		// save the https port the system is listening on so internal system can make
 		// HTTP api calls while in dev or production w/o adding more cli flags
 		err = db.PutConfig("http_port", fmt.Sprintf("%d", port))
 		if err != nil {
-			log.Fatalln("System failed to save config. Please try to run again.")
+			log.Fatalln("System failed to save config. Please try to run again.", err)
 		}
 
+		fmt.Printf("Server listening on :%d for HTTP requests...\n", port)
+		fmt.Println("\nvisit `/admin` to get started.")
 		log.Fatalln(http.ListenAndServe(fmt.Sprintf(":%d", port), nil))
 
 	case "":
diff --git a/cmd/ponzu/usage.go b/cmd/ponzu/usage.go
index 2dca46d..2d7a3b8 100644
--- a/cmd/ponzu/usage.go
+++ b/cmd/ponzu/usage.go
@@ -10,11 +10,10 @@ var year = fmt.Sprintf("%d", time.Now().Year())
 var usageHeader = `
 $ ponzu [flags] command <params>
 
-Ponzu is a powerful and efficient open-source "Content-as-a-Service" system 
-framework and CMS. It provides automatic, free, and secure HTTP/2 over TLS 
-(certificates obtained via Let's Encrypt - https://letsencrypt.org), a useful 
-CMS and  scaffolding to generate content editors, and a fast HTTP API on which 
-to build modern applications.
+Ponzu is a powerful and efficient open-source HTTP server framework and CMS. It 
+provides automatic, free, and secure HTTP/2 over TLS (certificates obtained via 
+[Let's Encrypt](https://letsencrypt.org)), a useful CMS and scaffolding to 
+generate content editors, and a fast HTTP API on which to build modern applications.
 
 Ponzu is released under the BSD-3-Clause license (see LICENSE).
 (c) ` + year + ` Boss Sauce Creative, LLC
@@ -55,17 +54,12 @@ new <directory>:
 `
 
 var usageGenerate = `
-generate, gen, g <type (,...fields)>:
+generate, gen, g <generator type (,...fields)>:
 
-	Generate a content type file with boilerplate code to implement
-	the editor.Editable interface. Must be given one (1) parameter of
-	the name of the type for the new content. The fields following a 
-	type determine the field names and types of the content struct to 
-	be generated. These must be in the following format:
-	fieldName:"T"
+	Generate boilerplate code for various Ponzu components, such as 'content'.
 
 	Example:
-	$ ponzu gen review title:"string" body:"string" rating:"int" tags:"[]string"
+	$ ponzu gen content review title:"string" body:"string" rating:"int" tags:"[]string"
 
 	The command above will generate a file 'content/review.go' with boilerplate
 	methods, as well as struct definition, and cooresponding field tags like: