Add example to build single binary with templates (#1328)

2018-04-22 16:04:38 +09:00 · 2018-04-22 16:04:38 +09:00 · 814ac9490a
parent dfe37ea6f1
commit 814ac9490a
8 changed files with 175 additions and 1 deletions
--- a/.travis.yml
+++ b/.travis.yml
@ -9,7 +9,7 @@ go:
  - master

 git:
-  depth: 3
+  depth: 10

 install:
  - make install
--- a/README.md
+++ b/README.md
@ -49,6 +49,7 @@ Gin is a web framework written in Go (Golang). It features a martini-like API wi
    - [Support Let's Encrypt](#support-lets-encrypt)
    - [Run multiple service using Gin](#run-multiple-service-using-gin)
    - [Graceful restart or stop](#graceful-restart-or-stop)
+    - [Build a single binary with templates](#build-a-single-binary-with-templates)
 - [Testing](#testing)
 - [Users](#users--)

@ -1393,6 +1394,50 @@ func main() {
 }
 ```

+### Build a single binary with templates
+
+You can build a server into a single binary containing templates by using [go-assets][].
+
+[go-assets]: https://github.com/jessevdk/go-assets
+
+```go
+func main() {
+	r := gin.New()
+
+	t, err := loadTemplate()
+	if err != nil {
+		panic(err)
+	}
+	r.SetHTMLTemplate(t)
+
+	r.GET("/", func(c *gin.Context) {
+		c.HTML(http.StatusOK, "/html/index.tmpl",nil)
+	})
+	r.Run(":8080")
+}
+
+// loadTemplate loads templates embedded by go-assets-builder
+func loadTemplate() (*template.Template, error) {
+	t := template.New("")
+	for name, file := range Assets.Files {
+		if file.IsDir() || !strings.HasSuffix(name, ".tmpl") {
+			continue
+		}
+		h, err := ioutil.ReadAll(file)
+		if err != nil {
+			return nil, err
+		}
+		t, err = t.New(name).Parse(string(h))
+		if err != nil {
+			return nil, err
+		}
+	}
+	return t, nil
+}
+```
+
+See a complete example in the `examples/assets-in-binary` directory.
+
 ## Testing

 The `net/http/httptest` package is preferable way for HTTP testing.
--- a/examples/assets-in-binary/README.md
+++ b/examples/assets-in-binary/README.md
@ -0,0 +1,33 @@
+# Building a single binary containing templates
+
+This is a complete example to create a single binary with the
+[gin-gonic/gin][gin] Web Server with HTML templates.
+
+[gin]: https://github.com/gin-gonic/gin
+
+## How to use
+
+### Prepare Packages
+
+```
+go get github.com/gin-gonic/gin
+go get github.com/jessevdk/go-assets-builder
+```
+
+### Generate assets.go
+
+```
+go-assets-builder html -o assets.go
+```
+
+### Build the server
+
+```
+go build -o assets-in-binary
+```
+
+### Run
+
+```
+./assets-in-binary
+```
--- a/examples/assets-in-binary/assets.go
+++ b/examples/assets-in-binary/assets.go
@ -0,0 +1,34 @@
+package main
+
+import (
+	"time"
+
+	"github.com/jessevdk/go-assets"
+)
+
+var _Assetsbfa8d115ce0617d89507412d5393a462f8e9b003 = "<!doctype html>\n<body>\n  <p>Can you see this? → {{.Bar}}</p>\n</body>\n"
+var _Assets3737a75b5254ed1f6d588b40a3449721f9ea86c2 = "<!doctype html>\n<body>\n  <p>Hello, {{.Foo}}</p>\n</body>\n"
+
+// Assets returns go-assets FileSystem
+var Assets = assets.NewFileSystem(map[string][]string{"/": {"html"}, "/html": {"bar.tmpl", "index.tmpl"}}, map[string]*assets.File{
+	"/": {
+		Path:     "/",
+		FileMode: 0x800001ed,
+		Mtime:    time.Unix(1524365738, 1524365738517125470),
+		Data:     nil,
+	}, "/html": {
+		Path:     "/html",
+		FileMode: 0x800001ed,
+		Mtime:    time.Unix(1524365491, 1524365491289799093),
+		Data:     nil,
+	}, "/html/bar.tmpl": {
+		Path:     "/html/bar.tmpl",
+		FileMode: 0x1a4,
+		Mtime:    time.Unix(1524365491, 1524365491289611557),
+		Data:     []byte(_Assetsbfa8d115ce0617d89507412d5393a462f8e9b003),
+	}, "/html/index.tmpl": {
+		Path:     "/html/index.tmpl",
+		FileMode: 0x1a4,
+		Mtime:    time.Unix(1524365491, 1524365491289995821),
+		Data:     []byte(_Assets3737a75b5254ed1f6d588b40a3449721f9ea86c2),
+	}}, "")
--- a/examples/assets-in-binary/html/bar.tmpl
+++ b/examples/assets-in-binary/html/bar.tmpl
@ -0,0 +1,4 @@
+<!doctype html>
+<body>
+  <p>Can you see this? → {{.Bar}}</p>
+</body>
--- a/examples/assets-in-binary/html/index.tmpl
+++ b/examples/assets-in-binary/html/index.tmpl
@ -0,0 +1,4 @@
+<!doctype html>
+<body>
+  <p>Hello, {{.Foo}}</p>
+</body>
--- a/examples/assets-in-binary/main.go
+++ b/examples/assets-in-binary/main.go
@ -0,0 +1,48 @@
+package main
+
+import (
+	"html/template"
+	"io/ioutil"
+	"net/http"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+)
+
+func main() {
+	r := gin.New()
+	t, err := loadTemplate()
+	if err != nil {
+		panic(err)
+	}
+	r.SetHTMLTemplate(t)
+	r.GET("/", func(c *gin.Context) {
+		c.HTML(http.StatusOK, "/html/index.tmpl", gin.H{
+			"Foo": "World",
+		})
+	})
+	r.GET("/bar", func(c *gin.Context) {
+		c.HTML(http.StatusOK, "/html/bar.tmpl", gin.H{
+			"Bar": "World",
+		})
+	})
+	r.Run(":8080")
+}
+
+func loadTemplate() (*template.Template, error) {
+	t := template.New("")
+	for name, file := range Assets.Files {
+		if file.IsDir() || !strings.HasSuffix(name, ".tmpl") {
+			continue
+		}
+		h, err := ioutil.ReadAll(file)
+		if err != nil {
+			return nil, err
+		}
+		t, err = t.New(name).Parse(string(h))
+		if err != nil {
+			return nil, err
+		}
+	}
+	return t, nil
+}
--- a/vendor/vendor.json
+++ b/vendor/vendor.json
@ -33,6 +33,12 @@
 			"revision": "5a0f697c9ed9d68fef0116532c6e05cfeae00e55",
 			"revisionTime": "2017-06-01T23:02:30Z"
 		},
+		{
+			"checksumSHA1": "Cq9h7eDNXXyR/qJPvO8/Rk4pmFg=",
+			"path": "github.com/jessevdk/go-assets",
+			"revision": "4f4301a06e153ff90e17793577ab6bf79f8dc5c5",
+			"revisionTime": "2016-09-21T14:41:39Z"
+		},
 		{
 			"checksumSHA1": "Ajh8TemnItg4nn+jKmVcsMRALBc=",
 			"path": "github.com/json-iterator/go",