Vendor dependencies with dep

vendor/github.com/kurin/blazer/examples/simple/simple.go

@@ -0,0 +1,134 @@
+// Copyright 2017, Google
+//
+// 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
+//
+//     http://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.
+
+// This is a simple program that will copy named files into or out of B2.
+//
+// To copy a file into B2:
+//
+//     B2_ACCOUNT_ID=foo B2_ACCOUNT_KEY=bar simple /path/to/file b2://bucket/path/to/dst
+//
+// To copy a file out:
+//
+//     B2_ACCOUNT_ID=foo B2_ACCOUNT_KEY=bar simple b2://bucket/path/to/file /path/to/dst
+package main
+
+import (
+	"context"
+	"flag"
+	"fmt"
+	"io"
+	"net/url"
+	"os"
+	"strings"
+
+	"github.com/kurin/blazer/b2"
+)
+
+func main() {
+	flag.Parse()
+	b2id := os.Getenv("B2_ACCOUNT_ID")
+	b2key := os.Getenv("B2_ACCOUNT_KEY")
+
+	args := flag.Args()
+	if len(args) != 2 {
+		fmt.Printf("Usage:\n\nsimple [src] [dst]\n")
+		return
+	}
+	src, dst := args[0], args[1]
+
+	ctx := context.Background()
+	c, err := b2.NewClient(ctx, b2id, b2key)
+	if err != nil {
+		fmt.Println(err)
+		return
+	}
+
+	var r io.ReadCloser
+	var w io.WriteCloser
+
+	if strings.HasPrefix(src, "b2://") {
+		reader, err := b2Reader(ctx, c, src)
+		if err != nil {
+			fmt.Println(err)
+			return
+		}
+		r = reader
+	} else {
+		f, err := os.Open(src)
+		if err != nil {
+			fmt.Println(err)
+			return
+		}
+		r = f
+	}
+	// Readers do not need their errors checked on close.  (Also it's a little
+	// silly to defer this in main(), but.)
+	defer r.Close()
+
+	if strings.HasPrefix(dst, "b2://") {
+		writer, err := b2Writer(ctx, c, dst)
+		if err != nil {
+			fmt.Println(err)
+			return
+		}
+		w = writer
+	} else {
+		f, err := os.Create(dst)
+		if err != nil {
+			fmt.Println(err)
+			return
+		}
+		w = f
+	}
+
+	// Copy and check error.
+	if _, err := io.Copy(w, r); err != nil {
+		fmt.Println(err)
+		return
+	}
+
+	// It is very important to check the error of the writer.
+	if err := w.Close(); err != nil {
+		fmt.Println(err)
+	}
+}
+
+func b2Reader(ctx context.Context, c *b2.Client, path string) (io.ReadCloser, error) {
+	o, err := b2Obj(ctx, c, path)
+	if err != nil {
+		return nil, err
+	}
+	return o.NewReader(ctx), nil
+}
+
+func b2Writer(ctx context.Context, c *b2.Client, path string) (io.WriteCloser, error) {
+	o, err := b2Obj(ctx, c, path)
+	if err != nil {
+		return nil, err
+	}
+	return o.NewWriter(ctx), nil
+}
+
+func b2Obj(ctx context.Context, c *b2.Client, path string) (*b2.Object, error) {
+	uri, err := url.Parse(path)
+	if err != nil {
+		return nil, err
+	}
+	bucket, err := c.Bucket(ctx, uri.Host)
+	if err != nil {
+		return nil, err
+	}
+	// B2 paths must not begin with /, so trim it here.
+	return bucket.Object(strings.TrimPrefix(uri.Path, "/")), nil
+}