add WebDAV support(#1610)

[yixy]

#1610

WebDAV support by adding method : MKCOL,COPY ,MOVE ,LOCK,UNLOCK, PROPPATCH, no dependencies added.

Working code using echo & golang.org/x/net/webdav

package main

import (
	"flag"
	"fmt"
	"os"

	"github.com/labstack/echo/v4"
	"golang.org/x/net/webdav"
)

var (
	flagRootDir  = flag.String("dir", "", "webdav root dir")
	flagHttpAddr = flag.String("http", ":8080", "http or https address")
)

func init() {
	flag.Usage = func() {
		fmt.Fprintf(os.Stderr, "Usage of WebDAV Server\n")
		flag.PrintDefaults()
	}
}
func main() {
	flag.Parse()
	fs := &webdav.Handler{
		FileSystem: webdav.Dir(*flagRootDir),
		LockSystem: webdav.NewMemLS(),
	}

	e := echo.New()
	e.Pre(func(next echo.HandlerFunc) echo.HandlerFunc {
		return func(c echo.Context) error {
			fmt.Println(c.Request())
			return next(c)
		}
	})
	echoHandle := echo.WrapHandler(fs)
	e.Any("/*", echoHandle)
	fmt.Println(e.Start(*flagHttpAddr))
}

Signed-off-by: yixy youzhilane01@gmail.com

[aldas]

Note to self:

I think we should port v5 way of handling arbitrary methods to v4. See how routeMethods.anyOther is handled

echo/router.go

Line 224 in ed2888c

anyOther map[string]*routeMethod

[yixy]

Note to self:

I think we should port v5 way of handling arbitrary methods to v4. See how routeMethods.anyOther is handled

echo/router.go

Line 224 in ed2888c

anyOther map[string]*routeMethod

I tried using code in v5_alpha, WebDAV seems not supported.