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feat: adds configuration mapping. (envoyproxy#79)
Co-authored-by: Anuraag Agrawal <anuraaga@gmail.com>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,58 @@ | ||
| // Copyright The OWASP Coraza contributors | ||
| // SPDX-License-Identifier: Apache-2.0 | ||
|
|
||
| package main | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "io/fs" | ||
| "strings" | ||
| ) | ||
|
|
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| type rulesFS struct { | ||
| fs fs.FS | ||
| filesMapping map[string]string | ||
| dirsMapping map[string]string | ||
| } | ||
|
|
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| func (r rulesFS) Open(name string) (fs.File, error) { | ||
| return r.fs.Open(r.mapPath(name)) | ||
| } | ||
|
|
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| func (r rulesFS) ReadDir(name string) ([]fs.DirEntry, error) { | ||
| for a, dst := range r.dirsMapping { | ||
| if a == name { | ||
| return fs.ReadDir(r.fs, dst) | ||
| } | ||
|
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| prefix := a + "/" | ||
| if strings.HasPrefix(name, prefix) { | ||
| return fs.ReadDir(r.fs, fmt.Sprintf("%s/%s", dst, name[len(prefix):])) | ||
| } | ||
| } | ||
| return fs.ReadDir(r.fs, name) | ||
| } | ||
|
|
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| func (r rulesFS) ReadFile(name string) ([]byte, error) { | ||
| return fs.ReadFile(r.fs, r.mapPath(name)) | ||
| } | ||
|
|
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| func (r rulesFS) mapPath(p string) string { | ||
| if strings.IndexByte(p, '/') != -1 { | ||
| // is not in root, hence we can do dir mapping | ||
| for a, dst := range r.dirsMapping { | ||
| prefix := a + "/" | ||
| if strings.HasPrefix(p, prefix) { | ||
| return fmt.Sprintf("%s/%s", dst, p[len(prefix):]) | ||
| } | ||
| } | ||
| } | ||
|
|
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| for a, dst := range r.filesMapping { | ||
| if a == p { | ||
| return dst | ||
| } | ||
| } | ||
|
|
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| return p | ||
| } |
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