404 if `static/` filename contains %

[Timer]

Bug report

Describe the bug

Static assets served from the static/ folder will 404 if they contain URL-encodable symbols.

Note: This issue is identical to #10004, but pertains to the static/ folder instead of the public/ folder.

To Reproduce

1. Create a new Next.js Application

   yarn create next-app test-static
   cd test-static
   

2. Create a static file with a unique name:

   mkdir static/
   echo "hello world" > static/hello%20copy.txt
   

3. Start the development server and issue a request for the file:

   yarn dev
   curl http://localhost:3000/static/hello%2520copy.txt
   

4. See a 404 instead of file contents.

Expected behavior

Running the following:

curl http://localhost:3000/static/hello%2520copy.txt

Should respond with the file contents, not a 404.

Screenshots

System information

• OS: macOS
• Version of Next.js: 9.3.2

Additional Context

Related issue: #9705
Related PR: #10022

[balazsorban44]

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