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// Copyright 2018 The Go Cloud Development Kit Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package fileblob_test
import (
"context"
"fmt"
"io/ioutil"
"log"
"os"
"path/filepath"
"strings"
"gocloud.dev/blob"
"gocloud.dev/blob/fileblob"
)
func ExampleOpenBucket() {
// PRAGMA: This example is used on gocloud.dev; PRAGMA comments adjust how it is shown and can be ignored.
// The directory you pass to fileblob.OpenBucket must exist first.
const myDir = "path/to/local/directory"
if err := os.MkdirAll(myDir, 0777); err != nil {
log.Fatal(err)
}
// Create a file-based bucket.
bucket, err := fileblob.OpenBucket(myDir, nil)
if err != nil {
log.Fatal(err)
}
defer bucket.Close()
}
func Example_openBucketFromURL() {
// Create a temporary directory.
dir, err := ioutil.TempDir("", "go-cloud-fileblob-example")
if err != nil {
log.Fatal(err)
}
defer os.RemoveAll(dir)
// On Unix, append the dir to "file://".
// On Windows, convert "\" to "/" and add a leading "/":
dirpath := filepath.ToSlash(dir)
if os.PathSeparator != '/' && !strings.HasPrefix(dirpath, "/") {
dirpath = "/" + dirpath
}
// blob.OpenBucket creates a *blob.Bucket from a URL.
ctx := context.Background()
b, err := blob.OpenBucket(ctx, "file://"+dirpath)
if err != nil {
log.Fatal(err)
}
defer b.Close()
// Now we can use b to read or write files to the container.
err = b.WriteAll(ctx, "my-key", []byte("hello world"), nil)
if err != nil {
log.Fatal(err)
}
data, err := b.ReadAll(ctx, "my-key")
if err != nil {
log.Fatal(err)
}
fmt.Println(string(data))
// Output:
// hello world
}
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