Basic HTML email rendering

Messages with a MIME text/html MIME part will now be displayed with an
`HTML` button above them that will open another window and render the
HTML when clicked.

There is no sanitization performed, and inline attachment display is
not support.

This closes #2

app/controllers/mailbox.go

@@ -3,6 +3,7 @@ package controllers
 import (
 	"github.com/jhillyerd/inbucket/app/inbucket"
 	"github.com/robfig/revel"
+	"html/template"
 )
 
 type Mailbox struct {
@@ -69,9 +70,10 @@ func (c Mailbox) Show(name string, id string) rev.Result {
 		return c.RenderError(err)
 	}
 	body := mime.Text
+	htmlAvailable := mime.Html != ""
 
 	c.Response.Out.Header().Set("Expires", "-1")
-	return c.Render(name, message, body)
+	return c.Render(name, message, body, htmlAvailable)
 }
 
 func (c Mailbox) Delete(name string, id string) rev.Result {
@@ -97,9 +99,41 @@ func (c Mailbox) Delete(name string, id string) rev.Result {
 	if err != nil {
 		return c.RenderError(err)
 	}
+	c.Response.Out.Header().Set("Expires", "-1")
 	return c.RenderText("OK")
 }
 
+func (c Mailbox) Html(name string, id string) rev.Result {
+	c.Validation.Required(name).Message("Account name is required")
+	c.Validation.Required(id).Message("Message ID is required")
+
+	if c.Validation.HasErrors() {
+		c.Validation.Keep()
+		c.FlashParams()
+		return c.Redirect(Application.Index)
+	}
+
+	ds := inbucket.NewDataStore()
+	mb, err := ds.MailboxFor(name)
+	if err != nil {
+		return c.RenderError(err)
+	}
+	message, err := mb.GetMessage(id)
+	if err != nil {
+		return c.RenderError(err)
+	}
+	_, mime, err := message.ReadBody()
+	if err != nil {
+		return c.RenderError(err)
+	}
+	// Mark as safe to render HTML
+	// TODO: It is not really safe to render, need to sanitize.
+	body := template.HTML(mime.Html)
+
+	c.Response.Out.Header().Set("Expires", "-1")
+	return c.Render(name, message, body)
+}
+
 func (c Mailbox) Source(name string, id string) rev.Result {
 	c.Validation.Required(name).Message("Account name is required")
 	c.Validation.Required(id).Message("Message ID is required")

app/views/Mailbox/Html.html

@@ -0,0 +1 @@
+{{.body}}

app/views/Mailbox/Index.html

@@ -44,6 +44,12 @@
     })
   }
 
+  function htmlView(id) {
+    window.open('/mailbox/html/{{$name}}/' + id, '_blank',
+    'width=800,height=600,' +
+    'menubar=yes,resizable=yes,scrollbars=yes,status=yes,toolbar=yes')
+  }
+
   function messageSource(id) {
     window.open('/mailbox/source/{{$name}}/' + id, '_blank',
     'width=800,height=600,' +

app/views/Mailbox/Show.html

@@ -1,6 +1,9 @@
 <div id="emailActions">
 	<a href="javascript:deleteMessage('{{.message.Id}}');">Delete</a>
 	<a href="javascript:messageSource('{{.message.Id}}');">Source</a>
+	{{if .htmlAvailable}}
+	<a href="javascript:htmlView('{{.message.Id}}');">HTML</a>
+	{{end}}
 </div>
 <table id="emailHeader">
 	<tr>

conf/routes

@@ -8,6 +8,7 @@ GET     /mailbox                                Mailbox.Index
 GET     /mailbox/list/{name}                    Mailbox.List
 GET     /mailbox/show/{name}/{id}               Mailbox.Show
 GET     /mailbox/source/{name}/{id}             Mailbox.Source
+GET     /mailbox/html/{name}/{id}               Mailbox.Html
 POST    /mailbox/delete/{name}/{id}             Mailbox.Delete
 
 # Ignore favicon requests