Updating examples for 'go build', run it in each example dir

Author: paulbellamy

examples/Makefile

@@ -1,17 +1,42 @@
 package main
 
 import (
-  "mango"
-  "cats_middleware"
+  "../../" // Point this to mango
   "net/http"
   "os"
   "io/ioutil"
+	"math/rand"
+	"regexp"
 )
 
+// Our custom middleware
+func Cats(cat_images []string) mango.Middleware {
+	// Initial setup stuff here
+	// Done on application setup
+
+	// Initialize our regex for finding image links
+	regex := regexp.MustCompile("[^\"']+(.jpg|.png|.gif)")
+
+	// This is our middleware's request handler
+	return func(env mango.Env, app mango.App) (mango.Status, mango.Headers, mango.Body) {
+		// Call the upstream application
+		status, headers, body := app(env)
+
+		// Pick a random cat image
+		image_url := cat_images[rand.Int()%len(cat_images)]
+
+		// Substitute in our cat picture
+		body = mango.Body(regex.ReplaceAllString(string(body), image_url))
+
+		// Send the modified response onwards
+		return status, headers, body
+	}
+}
+
 func Hello(env mango.Env) (mango.Status, mango.Headers, mango.Body) {
-  env.Logger().Println("Got a", env.Request().Method, "request for", env.Request().RawURL)
+  env.Logger().Println("Got a", env.Request().Method, "request for", env.Request().URL)
 
-  response, err := http.Get("http://www.weddinggalleryweb.com/")
+  response, err := http.Get("http://www.example.com/")
   if err != nil {
   	env.Logger().Printf("%s", err)
     os.Exit(1)
@@ -34,7 +59,7 @@ func main() {
 
   // Initialize our cats middleware with our list of cat_images
   cat_images := []string{"http://images.cheezburger.com/completestore/2010/7/4/9440dc57-52a6-4122-9ab3-efd4daa0ff60.jpg", "http://images.icanhascheezburger.com/completestore/2008/12/10/128733944185267668.jpg"}
-  cats_middleware := cats.Cats(cat_images)
+  cats_middleware := Cats(cat_images)
 
   stack.Middleware(cats_middleware) // Include the Cats middleware in our stack
 

examples/cats.go renamed to examples/cats/cats.go

@@ -1,7 +1,7 @@
 package main
 
 import (
-	"mango"
+	"../../" // Point this to mango
 )
 
 func Hello(env mango.Env) (mango.Status, mango.Headers, mango.Body) {

examples/cats_middleware.go

@@ -1,12 +1,13 @@
 package main
 
 import (
-	"mango"
+	"../../" // Point this at mango
 	"log"
 	"os"
 )
 
 func Hello(env mango.Env) (mango.Status, mango.Headers, mango.Body) {
+  env.Logger().Println("Got a", env.Request().Method, "request for", env.Request().URL)
 	return 200, mango.Headers{}, mango.Body("Hello World!")
 }
 

examples/hello.go renamed to examples/hello/hello.go

@@ -1,7 +1,7 @@
 package main
 
 import (
-	"mango"
+  "../../" // Point this to mango
 )
 
 // Our default handler

examples/logger.go renamed to examples/logger/logger.go

@@ -1,7 +1,7 @@
 package main
 
 import (
-	"mango"
+  "../../" // Point this to mango
 )
 
 func Hello(env mango.Env) (mango.Status, mango.Headers, mango.Body) {

examples/routing.go renamed to examples/routing/routing.go

@@ -0,0 +1,37 @@
+package main
+
+import (
+  "../../" // Point this to mango
+)
+
+// Our custom middleware
+func SilenceErrors(env mango.Env, app mango.App) (mango.Status, mango.Headers, mango.Body) {
+	// Call our upstream app
+	status, headers, body := app(env)
+
+	// If we got an error
+	if status == 500 {
+		// Silence it!
+		status = 200
+		headers = mango.Headers{}
+		body = "Silence is golden!"
+	}
+
+	// Pass the response back to the client
+	return status, headers, body
+}
+
+// Our default handler
+func Hello(env mango.Env) (mango.Status, mango.Headers, mango.Body) {
+  //Return 500 to trigger the silence
+	return 500, mango.Headers{}, mango.Body("Hello World!")
+}
+
+func main() {
+  stack := new(mango.Stack)
+  stack.Address = ":3000"
+
+  stack.Middleware(SilenceErrors) // Include our custom middleware
+
+  stack.Run(Hello)
+}