Bump github.com/valyala/fasthttp from 1.35.0 to 1.37.0 (gofiber#1882)

* Bump github.com/valyala/fasthttp from 1.35.0 to 1.36.0

Bumps [github.com/valyala/fasthttp](https://github.com/valyala/fasthttp) from 1.35.0 to 1.36.0.
- [Release notes](https://github.com/valyala/fasthttp/releases)
- [Commits](valyala/fasthttp@v1.35.0...v1.36.0)

---
updated-dependencies:
- dependency-name: github.com/valyala/fasthttp
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

* Bump github.com/valyala/fasthttp from 1.35.0 to 1.36.0 gofiber#1882

* Bump github.com/valyala/fasthttp from 1.35.0 to 1.36.0 gofiber#1882

* Bump github.com/valyala/fasthttp from 1.35.0 to 1.36.0 gofiber#1882

* Bump github.com/valyala/fasthttp from 1.35.0 to 1.36.0 gofiber#1882

* Bump github.com/valyala/fasthttp from 1.35.0 to 1.36.0 gofiber#1882

* Bump github.com/valyala/fasthttp from 1.35.0 to 1.37.0 gofiber#1882

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: wernerr <rene@gofiber.io>

ctx.go

@@ -1350,10 +1350,11 @@ func (c *Ctx) SendFile(file string, compress ...bool) error {
 	// Save the filename, we will need it in the error message if the file isn't found
 	filename := file
 
-	// https://github.com/valyala/fasthttp/blob/master/fs.go#L81
+	// https://github.com/valyala/fasthttp/blob/c7576cc10cabfc9c993317a2d3f8355497bea156/fs.go#L129-L134
 	sendFileOnce.Do(func() {
 		sendFileFS = &fasthttp.FS{
-			Root:                 "/",
+			Root:                 "",
+			AllowEmptyRoot:       true,
 			GenerateIndexPages:   false,
 			AcceptByteRange:      true,
 			Compress:             true,
@@ -1371,20 +1372,27 @@ func (c *Ctx) SendFile(file string, compress ...bool) error {
 	c.pathOriginal = utils.CopyString(c.pathOriginal)
 	// Disable compression
 	if len(compress) == 0 || !compress[0] {
-		// https://github.com/valyala/fasthttp/blob/master/fs.go#L46
+		// https://github.com/valyala/fasthttp/blob/7cc6f4c513f9e0d3686142e0a1a5aa2f76b3194a/fs.go#L55
 		c.fasthttp.Request.Header.Del(HeaderAcceptEncoding)
 	}
-	// https://github.com/valyala/fasthttp/blob/master/fs.go#L85
-	if len(file) == 0 || file[0] != '/' {
-		hasTrailingSlash := len(file) > 0 && file[len(file)-1] == '/'
+	// copy of https://github.com/valyala/fasthttp/blob/7cc6f4c513f9e0d3686142e0a1a5aa2f76b3194a/fs.go#L103-L121 with small adjustments
+	if len(file) == 0 || !filepath.IsAbs(file) {
+		// extend relative path to absolute path
+		hasTrailingSlash := len(file) > 0 && (file[len(file)-1] == '/' || file[len(file)-1] == '\\')
+
 		var err error
+		file = filepath.FromSlash(file)
 		if file, err = filepath.Abs(file); err != nil {
 			return err
 		}
 		if hasTrailingSlash {
 			file += "/"
 		}
 	}
+	// convert the path to forward slashes regardless the OS in order to set the URI properly
+	// the handler will convert back to OS path separator before opening the file
+	file = filepath.ToSlash(file)
+
 	// Restore the original requested URL
 	originalURL := utils.CopyString(c.OriginalURL())
 	defer c.fasthttp.Request.SetRequestURI(originalURL)

ctx_test.go

@@ -20,6 +20,7 @@ import (
 	"net/http/httptest"
 	"net/url"
 	"os"
+	"path/filepath"
 	"reflect"
 	"strconv"
 	"strings"
@@ -1908,7 +1909,7 @@ func Test_Ctx_SendFile_404(t *testing.T) {
 	t.Parallel()
 	app := New()
 	app.Get("/", func(c *Ctx) error {
-		err := c.SendFile("./john_dow.go/")
+		err := c.SendFile(filepath.FromSlash("john_dow.go/"))
 		utils.AssertEqual(t, false, err == nil)
 		return err
 	})
@@ -1922,22 +1923,44 @@ func Test_Ctx_SendFile_404(t *testing.T) {
 func Test_Ctx_SendFile_Immutable(t *testing.T) {
 	t.Parallel()
 	app := New()
-	app.Get("/:file", func(c *Ctx) error {
-		file := c.Params("file")
-		if err := c.SendFile("./.github/" + file + ".html"); err != nil {
+	var endpointsForTest []string
+	addEndpoint := func(file, endpoint string) {
+		endpointsForTest = append(endpointsForTest, endpoint)
+		app.Get(endpoint, func(c *Ctx) error {
+			if err := c.SendFile(file); err != nil {
+				utils.AssertEqual(t, nil, err)
+				return err
+			}
+			return c.SendStatus(200)
+		})
+	}
+
+	// relative paths
+	addEndpoint("./.github/index.html", "/relativeWithDot")
+	addEndpoint(filepath.FromSlash("./.github/index.html"), "/relativeOSWithDot")
+	addEndpoint(".github/index.html", "/relative")
+	addEndpoint(filepath.FromSlash(".github/index.html"), "/relativeOS")
+
+	// absolute paths
+	if path, err := filepath.Abs(".github/index.html"); err != nil {
+		utils.AssertEqual(t, nil, err)
+	} else {
+		addEndpoint(path, "/absolute")
+		addEndpoint(filepath.FromSlash(path), "/absoluteOS") // os related
+	}
+
+	for _, endpoint := range endpointsForTest {
+		t.Run(endpoint, func(t *testing.T) {
+			// 1st try
+			resp, err := app.Test(httptest.NewRequest("GET", endpoint, nil))
 			utils.AssertEqual(t, nil, err)
-		}
-		utils.AssertEqual(t, "index", file)
-		return c.SendString(file)
-	})
-	// 1st try
-	resp, err := app.Test(httptest.NewRequest("GET", "/index", nil))
-	utils.AssertEqual(t, nil, err)
-	utils.AssertEqual(t, StatusOK, resp.StatusCode)
-	// 2nd try
-	resp, err = app.Test(httptest.NewRequest("GET", "/index", nil))
-	utils.AssertEqual(t, nil, err)
-	utils.AssertEqual(t, StatusOK, resp.StatusCode)
+			utils.AssertEqual(t, StatusOK, resp.StatusCode)
+			// 2nd try
+			resp, err = app.Test(httptest.NewRequest("GET", endpoint, nil))
+			utils.AssertEqual(t, nil, err)
+			utils.AssertEqual(t, StatusOK, resp.StatusCode)
+		})
+	}
 }
 
 // go test -race -run Test_Ctx_SendFile_RestoreOriginalURL

go.mod

@@ -3,6 +3,6 @@ module github.com/gofiber/fiber/v2
 go 1.16
 
 require (
-	github.com/valyala/fasthttp v1.35.0
+	github.com/valyala/fasthttp v1.37.0
 	golang.org/x/sys v0.0.0-20220227234510-4e6760a101f9
 )

go.sum

@@ -4,8 +4,8 @@ github.com/klauspost/compress v1.15.0 h1:xqfchp4whNFxn5A4XFyyYtitiWI8Hy5EW59jEwc
 github.com/klauspost/compress v1.15.0/go.mod h1:/3/Vjq9QcHkK5uEr5lBEmyoZ1iFhe47etQ6QUkpK6sk=
 github.com/valyala/bytebufferpool v1.0.0 h1:GqA5TC/0021Y/b9FG4Oi9Mr3q7XYx6KllzawFIhcdPw=
 github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc=
-github.com/valyala/fasthttp v1.35.0 h1:wwkR8mZn2NbigFsaw2Zj5r+xkmzjbrA/lyTmiSlal/Y=
-github.com/valyala/fasthttp v1.35.0/go.mod h1:t/G+3rLek+CyY9bnIE+YlMRddxVAAGjhxndDB4i4C0I=
+github.com/valyala/fasthttp v1.37.0 h1:7WHCyI7EAkQMVmrfBhWTCOaeROb1aCBiTopx63LkMbE=
+github.com/valyala/fasthttp v1.37.0/go.mod h1:t/G+3rLek+CyY9bnIE+YlMRddxVAAGjhxndDB4i4C0I=
 github.com/valyala/tcplisten v1.0.0 h1:rBHj/Xf+E1tRGZyWIWwJDiRY0zc1Js+CV5DqwacVSA8=
 github.com/valyala/tcplisten v1.0.0/go.mod h1:T0xQ8SeCZGxckz9qRXTfG43PvQ/mcWh7FwZEA7Ioqkc=
 golang.org/x/crypto v0.0.0-20220214200702-86341886e292/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=

router.go

@@ -134,7 +134,7 @@ func (app *App) next(c *Ctx) (match bool, err error) {
 	}
 
 	// If c.Next() does not match, return 404
-	err = NewError(StatusNotFound, "Cannot " + c.method + " " + c.pathOriginal)
+	err = NewError(StatusNotFound, "Cannot "+c.method+" "+c.pathOriginal)
 
 	// If no match, scan stack again if other methods match the request
 	// Moved from app.handler because middleware may break the route chain
@@ -326,6 +326,7 @@ func (app *App) registerStatic(prefix, root string, config ...Static) Router {
 	// Fileserver settings
 	fs := &fasthttp.FS{
 		Root:                 root,
+		AllowEmptyRoot:       true,
 		GenerateIndexPages:   false,
 		AcceptByteRange:      false,
 		Compress:             false,