httpfs: github.com/shurcooL/httpfs/union Index | Examples | Files

package union

import "github.com/shurcooL/httpfs/union"

Package union offers a simple http.FileSystem that can unify multiple filesystems at various mount points.

Code:

fs0 := httpfs.New(mapfs.New(map[string]string{
    "zzz-last-file.txt":   "It should be visited last.",
    "a-file.txt":          "It has stuff.",
    "another-file.txt":    "Also stuff.",
    "folderA/entry-A.txt": "Alpha.",
    "folderA/entry-B.txt": "Beta.",
}))
fs1 := httpfs.New(mapfs.New(map[string]string{
    "sample-file.txt":                "This file compresses well. Blaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaah!",
    "not-worth-compressing-file.txt": "Its normal contents are here.",
    "folderA/file1.txt":              "Stuff 1.",
    "folderA/file2.txt":              "Stuff 2.",
    "folderB/folderC/file3.txt":      "Stuff C-3.",
}))

fs := union.New(map[string]http.FileSystem{
    "/fs0": fs0,
    "/fs1": fs1,
})

err := vfsutil.Walk(fs, "/", walk)
if err != nil {
    panic(err)
}

Output:

/
/fs0
/fs0/a-file.txt
/fs0/another-file.txt
/fs0/folderA
/fs0/folderA/entry-A.txt
/fs0/folderA/entry-B.txt
/fs0/zzz-last-file.txt
/fs1
/fs1/folderA
/fs1/folderA/file1.txt
/fs1/folderA/file2.txt
/fs1/folderB
/fs1/folderB/folderC
/fs1/folderB/folderC/file3.txt
/fs1/not-worth-compressing-file.txt
/fs1/sample-file.txt

Code:

empty := union.New(nil)

err := vfsutil.Walk(empty, "/", walk)
if err != nil {
    panic(err)
}

Output:

/

Code:

empty := union.New(nil)

_, err := empty.Open("/does-not-exist")
fmt.Println("os.IsNotExist:", os.IsNotExist(err))
fmt.Println(err)

Output:

os.IsNotExist: true
open /does-not-exist: file does not exist

Index

Examples

Package Files

union.go

func New Uses

func New(mapping map[string]http.FileSystem) http.FileSystem

New creates an union filesystem with the provided mapping of mount points to filesystems.

Each mount point must be of form "/mydir". It must start with a '/', and contain a single directory name.

Package union imports 6 packages (graph) and is imported by 3 packages. Updated 2017-01-01. Refresh now. Tools for package owners.