zipack

go get -u github.com/chilledoj/zipack

Package zipack provides a simple object to read files directly from a zip file and cache the results.

The struct utilises a sync.Map instead of the built-in map as the cache will only increase and will not be deleting keys. This also means that it should be safe for concurrent use.

Care should be taken when creating a zip file. For instance, the sqlfiles.zip file in the testdata folder was created on a Mac by selecting the folder in the finder, and then selecting the compress option on the context menu. This creates the zip file with the folder included in the file structure. Therefore, all of your paths must include this folder. See below and the tests for examples.

UPDATE: It is now possible to use the manager directly as a fs.FS (filesystem) and hence can be used as a file server within an http server.

Examples

Normal usage:

mgr := NewManager(Options{ZipFileName: "./testdata/sqlfiles.zip"})
fileKey := filepath.Join("sqlfiles","default", "selectDual.sql")
res, err := mgr.GetFileContents(fileKey)
if err != nil {
    panic(fmt.Errorf("Unexpected error: %v", err))
}
fmt.Printf("%s", res)
// Output:
// select
//   *
// from
//   DUAL

HTTP usage:

mgr := NewManager(Options{ZipFileName: "./testdata/sqlfiles.zip"})
mux := http.NewServeMux()
mux.Handle("/", http.FileServer(http.FS(mgr)))