Fix: static file routing path rewrite.

[fufuok]

Please provide enough information so that others can review your pull request:

Fixes: #1537

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[renanbastos93]

Can you create a unit test for this?

[fufuok]

Sure.

[fufuok]

go test -v -run=^Test_Route_Static
=== RUN   Test_Route_Static_Root
--- PASS: Test_Route_Static_Root (0.01s)
=== RUN   Test_Route_Static_HasPrefix
--- PASS: Test_Route_Static_HasPrefix (0.00s)
PASS
ok      github.com/gofiber/fiber/v2     0.077s

[renanbastos93]

Congrats, you made a good job.

[ReneWerner87]

@fufuok please correct the imports

[fufuok]

@fufuok please correct the imports

Done.

ioutil.TempFile instead of os.CreateTemp
ioutil.ReadAll instead of io.ReadAll

Tested in go1.14 and go1.17.

# go version
go version go1.14.15 windows/amd64

# go test -v -run=^Test_Route_Static
=== RUN   Test_Route_Static_Root
--- PASS: Test_Route_Static_Root (0.22s)
=== RUN   Test_Route_Static_HasPrefix
--- PASS: Test_Route_Static_HasPrefix (0.01s)
PASS
ok      github.com/gofiber/fiber/v2     1.633s

# go version
go version go1.17 linux/amd64

# go test -v -run=^Test_Route_Static
=== RUN   Test_Route_Static_Root
--- PASS: Test_Route_Static_Root (0.02s)
=== RUN   Test_Route_Static_HasPrefix
--- PASS: Test_Route_Static_HasPrefix (0.01s)
PASS
ok      github.com/gofiber/fiber/v2     0.088s

[ReneWerner87]

@fufuok please check

the existing tests should actually still work as they were without error

[fufuok]

https://github.com/gofiber/fiber/blob/master/app_test.go#L738
Why does the trailing slash here expect the result to be 404.

Please view this question gif and code: #1537

[ReneWerner87]

I think you are right, you can change the expectations

[fufuok]

Sorry, I rechecked the test case, because there is the default index.html in the directory, so it should be 200. I want to add another directory test case without index.html.

Unlike #1537 , it has option Browse: true

If possible, I would like to submit the above code, please approve it.