1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
package middleware
import (
"fmt"
"net/http"
"os"
"path"
"path/filepath"
"strings"
"github.com/labstack/echo"
)
type (
// StaticConfig defines the config for Static middleware.
StaticConfig struct {
// Skipper defines a function to skip middleware.
Skipper Skipper
// Root directory from where the static content is served.
// Required.
Root string `json:"root"`
// Index file for serving a directory.
// Optional. Default value "index.html".
Index string `json:"index"`
// Enable HTML5 mode by forwarding all not-found requests to root so that
// SPA (single-page application) can handle the routing.
// Optional. Default value false.
HTML5 bool `json:"html5"`
// Enable directory browsing.
// Optional. Default value false.
Browse bool `json:"browse"`
}
)
var (
// DefaultStaticConfig is the default Static middleware config.
DefaultStaticConfig = StaticConfig{
Skipper: DefaultSkipper,
Index: "index.html",
}
)
// Static returns a Static middleware to serves static content from the provided
// root directory.
func Static(root string) echo.MiddlewareFunc {
c := DefaultStaticConfig
c.Root = root
return StaticWithConfig(c)
}
// StaticWithConfig returns a Static middleware with config.
// See `Static()`.
func StaticWithConfig(config StaticConfig) echo.MiddlewareFunc {
// Defaults
if config.Root == "" {
config.Root = "." // For security we want to restrict to CWD.
}
if config.Skipper == nil {
config.Skipper = DefaultStaticConfig.Skipper
}
if config.Index == "" {
config.Index = DefaultStaticConfig.Index
}
return func(next echo.HandlerFunc) echo.HandlerFunc {
return func(c echo.Context) (err error) {
if config.Skipper(c) {
return next(c)
}
p := c.Request().URL.Path
if strings.HasSuffix(c.Path(), "*") { // When serving from a group, e.g. `/static*`.
p = c.Param("*")
}
p, err = echo.PathUnescape(p)
if err != nil {
return
}
name := filepath.Join(config.Root, path.Clean("/"+p)) // "/"+ for security
fi, err := os.Stat(name)
if err != nil {
if os.IsNotExist(err) {
if err = next(c); err != nil {
if he, ok := err.(*echo.HTTPError); ok {
if config.HTML5 && he.Code == http.StatusNotFound {
return c.File(filepath.Join(config.Root, config.Index))
}
}
return
}
}
return
}
if fi.IsDir() {
index := filepath.Join(name, config.Index)
fi, err = os.Stat(index)
if err != nil {
if config.Browse {
return listDir(name, c.Response())
}
if os.IsNotExist(err) {
return next(c)
}
return
}
return c.File(index)
}
return c.File(name)
}
}
}
func listDir(name string, res *echo.Response) (err error) {
dir, err := os.Open(name)
if err != nil {
return
}
dirs, err := dir.Readdir(-1)
if err != nil {
return
}
// Create a directory index
res.Header().Set(echo.HeaderContentType, echo.MIMETextHTMLCharsetUTF8)
if _, err = fmt.Fprintf(res, "<pre>\n"); err != nil {
return
}
for _, d := range dirs {
name := d.Name()
color := "#212121"
if d.IsDir() {
color = "#e91e63"
name += "/"
}
if _, err = fmt.Fprintf(res, "<a href=\"%s\" style=\"color: %s;\">%s</a>\n", name, color, name); err != nil {
return
}
}
_, err = fmt.Fprintf(res, "</pre>\n")
return
}
|
