Full support of the http.FileSystem on all view engines as requested at #1575

Also, the HandleDir accepts both string and http.FileSystem (interface{}) (like the view's fs)
2026-01-02 17:57:11 +00:00 · 2020-09-05 08:34:09 +03:00
parent 7e6d453dad
commit e1f25eb098
50 changed files with 1613 additions and 1226 deletions
--- a/_examples/view/template_jet_1_embedded/README.md
+++ b/_examples/view/template_jet_1_embedded/README.md
@@ -1,25 +0,0 @@
-# Jet Engine Example (Embedded)
-
-Take a look at the [../template_jet_0](../template_jet_0)'s README first.
-
-This example teaches you how to use jet templates embedded in your applications with ease using the Iris built-in Jet view engine.
-
-This example is a customized fork of https://github.com/CloudyKit/jet/tree/master/examples/asset_packaging, so you can
-notice the differences side by side. For example, you don't have to use any external package inside your application,
-Iris manually builds the template loader for binary data when Asset and AssetNames are available through tools like the [go-bindata](github.com/go-bindata/go-bindata).
-
-Note that you can still use any custom loaders through the `JetEngine.SetLoader`
-which overrides any previous loaders like `JetEngine.Binary` we use on this example.
-
-## How to run
-
-```sh
-$ go get -u github.com/go-bindata/go-bindata/v3/go-bindata
-$ go-bindata ./views/...
-$ go build
-$ ./template_jet_0_embedded
-```
-
-Repeat the above steps on any `./views` changes.
-
-> html files are not used, only binary data. You can move or delete the `./views` folder.
--- a/_examples/view/template_jet_1_embedded/bindata.go
+++ b/_examples/view/template_jet_1_embedded/bindata.go
@@ -1,5 +1,6 @@
-// Code generated by go-bindata. DO NOT EDIT.
-// sources:
+// Code generated by go-bindata. (@generated) DO NOT EDIT.
+
+// Package main generated by go-bindata.// sources:
 // views/includes/_partial.jet
 // views/includes/blocks.jet
 // views/index.jet
@@ -12,6 +13,7 @@ import (
 	"fmt"
 	"io"
 	"io/ioutil"
+	"net/http"
 	"os"
 	"path/filepath"
 	"strings"
@@ -21,7 +23,7 @@ import (
 func bindataRead(data []byte, name string) ([]byte, error) {
 	gz, err := gzip.NewReader(bytes.NewBuffer(data))
 	if err != nil {
-		return nil, fmt.Errorf("Read %q: %v", name, err)
+		return nil, fmt.Errorf("read %q: %v", name, err)
 	}

 	var buf bytes.Buffer
@@ -29,7 +31,7 @@ func bindataRead(data []byte, name string) ([]byte, error) {
 	clErr := gz.Close()

 	if err != nil {
-		return nil, fmt.Errorf("Read %q: %v", name, err)
+		return nil, fmt.Errorf("read %q: %v", name, err)
 	}
 	if clErr != nil {
 		return nil, err
@@ -50,101 +52,198 @@ type bindataFileInfo struct {
 	modTime time.Time
 }

+// Name return file name
 func (fi bindataFileInfo) Name() string {
 	return fi.name
 }
+
+// Size return file size
 func (fi bindataFileInfo) Size() int64 {
 	return fi.size
 }
+
+// Mode return file mode
 func (fi bindataFileInfo) Mode() os.FileMode {
 	return fi.mode
 }
+
+// ModTime return file modify time
 func (fi bindataFileInfo) ModTime() time.Time {
 	return fi.modTime
 }
+
+// IsDir return file whether a directory
 func (fi bindataFileInfo) IsDir() bool {
-	return false
+	return fi.mode&os.ModeDir != 0
 }
+
+// Sys return file is sys mode
 func (fi bindataFileInfo) Sys() interface{} {
 	return nil
 }

-var _viewsIncludes_partialJet = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\xb2\x29\xb0\xf3\xcc\x4b\xce\x29\x4d\x49\x4d\x51\x28\x48\x2c\x2a\xc9\x4c\xcc\xb1\xd1\x2f\xb0\xe3\xe5\x02\x04\x00\x00\xff\xff\x90\x62\x4f\xfb\x19\x00\x00\x00")
+type assetFile struct {
+	*bytes.Reader
+	name            string
+	childInfos      []os.FileInfo
+	childInfoOffset int
+}

-func viewsIncludes_partialJetBytes() ([]byte, error) {
+type assetOperator struct{}
+
+// Open implement http.FileSystem interface
+func (f *assetOperator) Open(name string) (http.File, error) {
+	var err error
+	if len(name) > 0 && name[0] == '/' {
+		name = name[1:]
+	}
+	content, err := Asset(name)
+	if err == nil {
+		return &assetFile{name: name, Reader: bytes.NewReader(content)}, nil
+	}
+	children, err := AssetDir(name)
+	if err == nil {
+		childInfos := make([]os.FileInfo, 0, len(children))
+		for _, child := range children {
+			childPath := filepath.Join(name, child)
+			info, errInfo := AssetInfo(filepath.Join(name, child))
+			if errInfo == nil {
+				childInfos = append(childInfos, info)
+			} else {
+				childInfos = append(childInfos, newDirFileInfo(childPath))
+			}
+		}
+		return &assetFile{name: name, childInfos: childInfos}, nil
+	} else {
+		// If the error is not found, return an error that will
+		// result in a 404 error. Otherwise the server returns
+		// a 500 error for files not found.
+		if strings.Contains(err.Error(), "not found") {
+			return nil, os.ErrNotExist
+		}
+		return nil, err
+	}
+}
+
+// Close no need do anything
+func (f *assetFile) Close() error {
+	return nil
+}
+
+// Readdir read dir's children file info
+func (f *assetFile) Readdir(count int) ([]os.FileInfo, error) {
+	if len(f.childInfos) == 0 {
+		return nil, os.ErrNotExist
+	}
+	if count <= 0 {
+		return f.childInfos, nil
+	}
+	if f.childInfoOffset+count > len(f.childInfos) {
+		count = len(f.childInfos) - f.childInfoOffset
+	}
+	offset := f.childInfoOffset
+	f.childInfoOffset += count
+	return f.childInfos[offset : offset+count], nil
+}
+
+// Stat read file info from asset item
+func (f *assetFile) Stat() (os.FileInfo, error) {
+	if len(f.childInfos) != 0 {
+		return newDirFileInfo(f.name), nil
+	}
+	return AssetInfo(f.name)
+}
+
+// newDirFileInfo return default dir file info
+func newDirFileInfo(name string) os.FileInfo {
+	return &bindataFileInfo{
+		name:    name,
+		size:    0,
+		mode:    os.FileMode(2147484068), // equal os.FileMode(0644)|os.ModeDir
+		modTime: time.Time{}}
+}
+
+// AssetFile return a http.FileSystem instance that data backend by asset
+func AssetFile() http.FileSystem {
+	return &assetOperator{}
+}
+
+var _includes_partialJet = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\xb2\x29\xb0\xf3\xcc\x4b\xce\x29\x4d\x49\x4d\x51\x28\x48\x2c\x2a\xc9\x4c\xcc\xb1\xd1\x2f\xb0\xe3\xe5\x02\x04\x00\x00\xff\xff\x90\x62\x4f\xfb\x19\x00\x00\x00")
+
+func includes_partialJetBytes() ([]byte, error) {
 	return bindataRead(
-		_viewsIncludes_partialJet,
-		"views/includes/_partial.jet",
+		_includes_partialJet,
+		"includes/_partial.jet",
 	)
 }

-func viewsIncludes_partialJet() (*asset, error) {
-	bytes, err := viewsIncludes_partialJetBytes()
+func includes_partialJet() (*asset, error) {
+	bytes, err := includes_partialJetBytes()
 	if err != nil {
 		return nil, err
 	}

-	info := bindataFileInfo{name: "views/includes/_partial.jet", size: 25, mode: os.FileMode(438), modTime: time.Unix(1565946441, 0)}
+	info := bindataFileInfo{name: "includes/_partial.jet", size: 25, mode: os.FileMode(438), modTime: time.Unix(1599156854, 0)}
 	a := &asset{bytes: bytes, info: info}
 	return a, nil
 }

-var _viewsIncludesBlocksJet = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\xaa\xae\x4e\xca\xc9\x4f\xce\x56\xc8\x4d\xcd\x2b\xd5\xd0\xac\xad\xe5\xe5\x52\x50\xb0\x29\xb0\x0b\xc9\x48\x05\x0b\x29\x40\x64\xcb\x13\x8b\x15\x32\xf3\xca\xf2\xb3\x53\x53\xf4\x6c\xf4\x0b\xec\x78\xb9\xaa\xab\x53\xf3\x52\x40\xca\x01\x01\x00\x00\xff\xff\xa0\xd9\xd9\x5d\x41\x00\x00\x00")
+var _includesBlocksJet = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\xaa\xae\x4e\xca\xc9\x4f\xce\x56\xc8\x4d\xcd\x2b\xd5\xd0\xac\xad\xe5\xe5\x52\x50\xb0\x29\xb0\x0b\xc9\x48\x05\x0b\x29\x40\x64\xcb\x13\x8b\x15\x32\xf3\xca\xf2\xb3\x53\x53\xf4\x6c\xf4\x0b\xec\x78\xb9\xaa\xab\x53\xf3\x52\x40\xca\x01\x01\x00\x00\xff\xff\xa0\xd9\xd9\x5d\x41\x00\x00\x00")

-func viewsIncludesBlocksJetBytes() ([]byte, error) {
+func includesBlocksJetBytes() ([]byte, error) {
 	return bindataRead(
-		_viewsIncludesBlocksJet,
-		"views/includes/blocks.jet",
+		_includesBlocksJet,
+		"includes/blocks.jet",
 	)
 }

-func viewsIncludesBlocksJet() (*asset, error) {
-	bytes, err := viewsIncludesBlocksJetBytes()
+func includesBlocksJet() (*asset, error) {
+	bytes, err := includesBlocksJetBytes()
 	if err != nil {
 		return nil, err
 	}

-	info := bindataFileInfo{name: "views/includes/blocks.jet", size: 65, mode: os.FileMode(438), modTime: time.Unix(1565946441, 0)}
+	info := bindataFileInfo{name: "includes/blocks.jet", size: 65, mode: os.FileMode(438), modTime: time.Unix(1599156854, 0)}
 	a := &asset{bytes: bytes, info: info}
 	return a, nil
 }

-var _viewsIndexJet = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x64\x90\xb1\x6a\xf3\x30\x14\x85\xf7\x1f\xfe\x77\x38\xf5\xd2\x74\xa9\xc9\x5a\x8c\x87\x42\x86\x2e\x5d\xfa\x00\x45\xb6\x6e\xb0\x1a\x59\x57\xf8\x5e\xd7\x36\x22\xef\x5e\x2c\x9b\x10\xda\xed\x48\xe7\x3b\xe8\x43\x29\xd1\xac\x14\xac\xa0\xf0\x66\xe1\x51\xa5\x34\x31\x7a\xd7\x1a\x75\x1c\x9e\xbf\x48\x8b\xeb\xf5\xff\xbf\x94\x5c\x1f\x79\x50\x14\x2e\xb4\x7e\xb4\x24\x65\xe3\xb9\xbd\xc8\x8d\x58\x99\x7c\x05\xcb\xed\xd8\x53\xd0\x57\xb6\xcb\xe1\x69\xed\x80\xaa\x3b\xd6\xa7\xbe\x21\x6b\xc9\x82\x66\xd3\x47\x4f\x55\xd9\x1d\xeb\x75\x08\x54\xc1\x7c\xd7\x6b\x00\x52\x5a\x1c\x79\x8b\x9e\xc2\x78\x5b\x97\x5b\xbf\xe6\x94\x76\x83\x3b\x95\xcf\x68\x06\x75\xc6\xdf\xc9\x64\xf0\x8c\x87\x9d\x79\x3b\x9f\x66\x27\x2a\x87\xc2\x32\xc9\x3b\x6b\x3e\x66\x7e\x7f\x03\xa8\x62\xfd\xd1\xf1\x24\xe8\x78\xfa\x33\xc4\xc4\xc3\x45\x5e\xf0\x7b\x8e\xc9\x08\x02\x2b\x76\xde\xa2\xa1\xd6\x8c\x42\x70\x9a\xe1\xf0\xa8\xa0\x4c\x57\x65\xac\x37\x31\x0a\x76\xfb\xd4\x3d\xfc\x04\x00\x00\xff\xff\x28\x5a\x9d\x42\x85\x01\x00\x00")
+var _indexJet = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x64\x90\xb1\x6a\xf3\x30\x14\x85\xf7\x1f\xfe\x77\x38\xf5\xd2\x74\xa9\xc9\x5a\x8c\x87\x42\x86\x2e\x5d\xfa\x00\x45\xb6\x6e\xb0\x1a\x59\x57\xf8\x5e\xd7\x36\x22\xef\x5e\x2c\x9b\x10\xda\xed\x48\xe7\x3b\xe8\x43\x29\xd1\xac\x14\xac\xa0\xf0\x66\xe1\x51\xa5\x34\x31\x7a\xd7\x1a\x75\x1c\x9e\xbf\x48\x8b\xeb\xf5\xff\xbf\x94\x5c\x1f\x79\x50\x14\x2e\xb4\x7e\xb4\x24\x65\xe3\xb9\xbd\xc8\x8d\x58\x99\x7c\x05\xcb\xed\xd8\x53\xd0\x57\xb6\xcb\xe1\x69\xed\x80\xaa\x3b\xd6\xa7\xbe\x21\x6b\xc9\x82\x66\xd3\x47\x4f\x55\xd9\x1d\xeb\x75\x08\x54\xc1\x7c\xd7\x6b\x00\x52\x5a\x1c\x79\x8b\x9e\xc2\x78\x5b\x97\x5b\xbf\xe6\x94\x76\x83\x3b\x95\xcf\x68\x06\x75\xc6\xdf\xc9\x64\xf0\x8c\x87\x9d\x79\x3b\x9f\x66\x27\x2a\x87\xc2\x32\xc9\x3b\x6b\x3e\x66\x7e\x7f\x03\xa8\x62\xfd\xd1\xf1\x24\xe8\x78\xfa\x33\xc4\xc4\xc3\x45\x5e\xf0\x7b\x8e\xc9\x08\x02\x2b\x76\xde\xa2\xa1\xd6\x8c\x42\x70\x9a\xe1\xf0\xa8\xa0\x4c\x57\x65\xac\x37\x31\x0a\x76\xfb\xd4\x3d\xfc\x04\x00\x00\xff\xff\x28\x5a\x9d\x42\x85\x01\x00\x00")

-func viewsIndexJetBytes() ([]byte, error) {
+func indexJetBytes() ([]byte, error) {
 	return bindataRead(
-		_viewsIndexJet,
-		"views/index.jet",
+		_indexJet,
+		"index.jet",
 	)
 }

-func viewsIndexJet() (*asset, error) {
-	bytes, err := viewsIndexJetBytes()
+func indexJet() (*asset, error) {
+	bytes, err := indexJetBytes()
 	if err != nil {
 		return nil, err
 	}

-	info := bindataFileInfo{name: "views/index.jet", size: 389, mode: os.FileMode(438), modTime: time.Unix(1594059793, 0)}
+	info := bindataFileInfo{name: "index.jet", size: 389, mode: os.FileMode(438), modTime: time.Unix(1599156854, 0)}
 	a := &asset{bytes: bytes, info: info}
 	return a, nil
 }

-var _viewsLayoutsApplicationJet = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x3c\x8e\xbd\xae\xc2\x30\x0c\x85\xf7\x4a\x7d\x07\xdf\x4c\x97\x01\x75\x65\x70\x3b\x00\x65\x85\xa1\x0c\x8c\x69\x6d\x11\x44\x7e\x10\x18\x89\x2a\xca\xbb\x23\xda\xc0\x64\xcb\x3e\xdf\xa7\x83\x7f\xdb\xfd\xa6\x3b\x1d\x5a\x30\xe2\x6c\x53\x16\xf8\x99\x60\xb5\x3f\xd7\x8a\xbd\x6a\xca\x02\x00\x0d\x6b\x9a\x36\x00\x74\x2c\x1a\x06\xa3\xef\x0f\x96\x5a\x1d\xbb\xdd\x72\xa5\xbe\x3f\xb9\x88\xe5\xa6\x75\x3d\x13\x31\x01\xbf\xb4\xbb\x59\xc6\x6a\xbe\x4f\xaa\xea\xe7\xc2\x3e\xd0\x98\xc9\x18\x7b\x1b\x86\x2b\x50\x18\x9e\x8e\xbd\xac\x03\x8d\xff\x8b\x94\x62\x64\x4f\x29\xcd\x64\xce\x63\x95\xab\xbe\x03\x00\x00\xff\xff\xee\xc2\x94\xa4\xbc\x00\x00\x00")
+var _layoutsApplicationJet = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x3c\x8e\xbd\xae\xc2\x30\x0c\x85\xf7\x4a\x7d\x07\xdf\x4c\x97\x01\x75\x65\x70\x3b\x00\x65\x85\xa1\x0c\x8c\x69\x6d\x11\x44\x7e\x10\x18\x89\x2a\xca\xbb\x23\xda\xc0\x64\xcb\x3e\xdf\xa7\x83\x7f\xdb\xfd\xa6\x3b\x1d\x5a\x30\xe2\x6c\x53\x16\xf8\x99\x60\xb5\x3f\xd7\x8a\xbd\x6a\xca\x02\x00\x0d\x6b\x9a\x36\x00\x74\x2c\x1a\x06\xa3\xef\x0f\x96\x5a\x1d\xbb\xdd\x72\xa5\xbe\x3f\xb9\x88\xe5\xa6\x75\x3d\x13\x31\x01\xbf\xb4\xbb\x59\xc6\x6a\xbe\x4f\xaa\xea\xe7\xc2\x3e\xd0\x98\xc9\x18\x7b\x1b\x86\x2b\x50\x18\x9e\x8e\xbd\xac\x03\x8d\xff\x8b\x94\x62\x64\x4f\x29\xcd\x64\xce\x63\x95\xab\xbe\x03\x00\x00\xff\xff\xee\xc2\x94\xa4\xbc\x00\x00\x00")

-func viewsLayoutsApplicationJetBytes() ([]byte, error) {
+func layoutsApplicationJetBytes() ([]byte, error) {
 	return bindataRead(
-		_viewsLayoutsApplicationJet,
-		"views/layouts/application.jet",
+		_layoutsApplicationJet,
+		"layouts/application.jet",
 	)
 }

-func viewsLayoutsApplicationJet() (*asset, error) {
-	bytes, err := viewsLayoutsApplicationJetBytes()
+func layoutsApplicationJet() (*asset, error) {
+	bytes, err := layoutsApplicationJetBytes()
 	if err != nil {
 		return nil, err
 	}

-	info := bindataFileInfo{name: "views/layouts/application.jet", size: 188, mode: os.FileMode(438), modTime: time.Unix(1565946441, 0)}
+	info := bindataFileInfo{name: "layouts/application.jet", size: 188, mode: os.FileMode(438), modTime: time.Unix(1599156854, 0)}
 	a := &asset{bytes: bytes, info: info}
 	return a, nil
 }
@@ -153,8 +252,8 @@ func viewsLayoutsApplicationJet() (*asset, error) {
 // It returns an error if the asset could not be found or
 // could not be loaded.
 func Asset(name string) ([]byte, error) {
-	cannonicalName := strings.Replace(name, "\\", "/", -1)
-	if f, ok := _bindata[cannonicalName]; ok {
+	canonicalName := strings.Replace(name, "\\", "/", -1)
+	if f, ok := _bindata[canonicalName]; ok {
 		a, err := f()
 		if err != nil {
 			return nil, fmt.Errorf("Asset %s can't read by error: %v", name, err)
@@ -179,8 +278,8 @@ func MustAsset(name string) []byte {
 // It returns an error if the asset could not be found or
 // could not be loaded.
 func AssetInfo(name string) (os.FileInfo, error) {
-	cannonicalName := strings.Replace(name, "\\", "/", -1)
-	if f, ok := _bindata[cannonicalName]; ok {
+	canonicalName := strings.Replace(name, "\\", "/", -1)
+	if f, ok := _bindata[canonicalName]; ok {
 		a, err := f()
 		if err != nil {
 			return nil, fmt.Errorf("AssetInfo %s can't read by error: %v", name, err)
@@ -201,10 +300,10 @@ func AssetNames() []string {

 // _bindata is a table, holding each asset generator, mapped to its name.
 var _bindata = map[string]func() (*asset, error){
-	"views/includes/_partial.jet":   viewsIncludes_partialJet,
-	"views/includes/blocks.jet":     viewsIncludesBlocksJet,
-	"views/index.jet":               viewsIndexJet,
-	"views/layouts/application.jet": viewsLayoutsApplicationJet,
+	"includes/_partial.jet":   includes_partialJet,
+	"includes/blocks.jet":     includesBlocksJet,
+	"index.jet":               indexJet,
+	"layouts/application.jet": layoutsApplicationJet,
 }

 // AssetDir returns the file names below a certain
@@ -218,13 +317,13 @@ var _bindata = map[string]func() (*asset, error){
 //         b.png
 // then AssetDir("data") would return []string{"foo.txt", "img"}
 // AssetDir("data/img") would return []string{"a.png", "b.png"}
-// AssetDir("foo.txt") and AssetDir("notexist") would return an error
+// AssetDir("foo.txt") and AssetDir("nonexistent") would return an error
 // AssetDir("") will return []string{"data"}.
 func AssetDir(name string) ([]string, error) {
 	node := _bintree
 	if len(name) != 0 {
-		cannonicalName := strings.Replace(name, "\\", "/", -1)
-		pathList := strings.Split(cannonicalName, "/")
+		canonicalName := strings.Replace(name, "\\", "/", -1)
+		pathList := strings.Split(canonicalName, "/")
 		for _, p := range pathList {
 			node = node.Children[p]
 			if node == nil {
@@ -248,15 +347,13 @@ type bintree struct {
 }

 var _bintree = &bintree{nil, map[string]*bintree{
-	"views": {nil, map[string]*bintree{
-		"includes": {nil, map[string]*bintree{
-			"_partial.jet": {viewsIncludes_partialJet, map[string]*bintree{}},
-			"blocks.jet":   {viewsIncludesBlocksJet, map[string]*bintree{}},
-		}},
-		"index.jet": {viewsIndexJet, map[string]*bintree{}},
-		"layouts": {nil, map[string]*bintree{
-			"application.jet": {viewsLayoutsApplicationJet, map[string]*bintree{}},
-		}},
+	"includes": {nil, map[string]*bintree{
+		"_partial.jet": {includes_partialJet, map[string]*bintree{}},
+		"blocks.jet":   {includesBlocksJet, map[string]*bintree{}},
+	}},
+	"index.jet": {indexJet, map[string]*bintree{}},
+	"layouts": {nil, map[string]*bintree{
+		"application.jet": {layoutsApplicationJet, map[string]*bintree{}},
 	}},
 }}

@@ -303,6 +400,6 @@ func RestoreAssets(dir, name string) error {
 }

 func _filePath(dir, name string) string {
-	cannonicalName := strings.Replace(name, "\\", "/", -1)
-	return filepath.Join(append([]string{dir}, strings.Split(cannonicalName, "/")...)...)
+	canonicalName := strings.Replace(name, "\\", "/", -1)
+	return filepath.Join(append([]string{dir}, strings.Split(canonicalName, "/")...)...)
 }
--- a/_examples/view/template_jet_1_embedded/main.go
+++ b/_examples/view/template_jet_1_embedded/main.go
@@ -6,29 +6,31 @@ package main

 import (
 	"os"
-	"strings"

 	"github.com/kataras/iris/v12"
 )

-// $ go get -u github.com/go-bindata/go-bindata/v3/go-bindata
-// $ go-bindata ./views/...
+// $ go get -u github.com/go-bindata/go-bindata
+// # OR: go get -u github.com/go-bindata/go-bindata/v3/go-bindata
+// # to save it to your go.mod file
+//
+// $ go-bindata -fs -prefix "views" ./views/...
 // $ go run .
+//
+// System files are not used, you can optionally delete the folder and run the example now.
 func main() {
 	app := iris.New()
-	tmpl := iris.Jet("./views", ".jet").Binary(Asset, AssetNames)
+	tmpl := iris.Jet(AssetFile(), ".jet")
 	app.RegisterView(tmpl)

 	app.Get("/", func(ctx iris.Context) {
 		ctx.View("index.jet")
 	})

-	port := os.Getenv("PORT")
-	if len(port) == 0 {
-		port = ":8080"
-	} else if !strings.HasPrefix(":", port) {
-		port = ":" + port
+	addr := ":8080"
+	if port := os.Getenv("PORT"); port != "" {
+		addr = ":" + port
 	}

-	app.Listen(port)
+	app.Listen(addr)
 }