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net/http: document Dir behavior with symlinks

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Based on CL 229377.

Change-Id: I016eec20672c909e8fabe799c277f4d2540fc555
Reviewed-on: https://go-review.googlesource.com/c/go/+/238698
Run-TryBot: Katie Hockman <katie@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Filippo Valsorda <filippo@golang.org>
This commit is contained in:
Katie Hockman 2020-06-18 11:26:07 -04:00
parent 968e18eebd
commit 18bcc7c285
1 changed files with 7 additions and 5 deletions
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12
src/net/http/fs.go
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@ -30,11 +30,13 @@ import (
// value is a filename on the native file system, not a URL, so it is separated
// by filepath.Separator, which isn't necessarily '/'.
//
// Note that Dir will allow access to files and directories starting with a
// period, which could expose sensitive directories like a .git directory or
// sensitive files like .htpasswd. To exclude files with a leading period,
// remove the files/directories from the server or create a custom FileSystem
// implementation.
// Note that Dir could expose sensitive files and directories. Dir will follow
// symlinks pointing out of the directory tree, which can be especially dangerous
// if serving from a directory in which users are able to create arbitrary symlinks.
// Dir will also allow access to files and directories starting with a period,
// which could expose sensitive directories like .git or sensitive files like
// .htpasswd. To exclude files with a leading period, remove the files/directories
// from the server or create a custom FileSystem implementation.
//
// An empty Dir is treated as ".".
type Dir string