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// Copyright 2018 The go-ethereum Authors
// This file is part of go-ethereum.
//
// go-ethereum is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// go-ethereum is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
package main
import (
"fmt"
"os"
"path/filepath"
"strings"
"github.com/ethereum/go-ethereum/cmd/utils"
"github.com/ethereum/go-ethereum/log"
"github.com/ethereum/go-ethereum/swarm/api"
swarm "github.com/ethereum/go-ethereum/swarm/api/client"
"gopkg.in/urfave/cli.v1"
)
var downloadCommand = cli.Command{
Action: download,
Name: "down",
Flags: []cli.Flag{SwarmRecursiveFlag, SwarmAccessPasswordFlag},
Usage: "downloads a swarm manifest or a file inside a manifest",
ArgsUsage: " <uri> [<dir>]",
Description: `Downloads a swarm bzz uri to the given dir. When no dir is provided, working directory is assumed. --recursive flag is expected when downloading a manifest with multiple entries.`,
}
func download(ctx *cli.Context) {
log.Debug("downloading content using swarm down")
args := ctx.Args()
dest := "."
switch len(args) {
case 0:
utils.Fatalf("Usage: swarm down [options] <bzz locator> [<destination path>]")
case 1:
log.Trace(fmt.Sprintf("swarm down: no destination path - assuming working dir"))
default:
log.Trace(fmt.Sprintf("destination path arg: %s", args[1]))
if absDest, err := filepath.Abs(args[1]); err == nil {
dest = absDest
} else {
utils.Fatalf("could not get download path: %v", err)
}
}
var (
bzzapi = strings.TrimRight(ctx.GlobalString(SwarmApiFlag.Name), "/")
isRecursive = ctx.Bool(SwarmRecursiveFlag.Name)
client = swarm.NewClient(bzzapi)
)
if fi, err := os.Stat(dest); err == nil {
if isRecursive && !fi.Mode().IsDir() {
utils.Fatalf("destination path is not a directory!")
}
} else {
if !os.IsNotExist(err) {
utils.Fatalf("could not stat path: %v", err)
}
}
uri, err := api.Parse(args[0])
if err != nil {
utils.Fatalf("could not parse uri argument: %v", err)
}
dl := func(credentials string) error {
// assume behaviour according to --recursive switch
if isRecursive {
if err := client.DownloadDirectory(uri.Addr, uri.Path, dest, credentials); err != nil {
if err == swarm.ErrUnauthorized {
return err
}
return fmt.Errorf("directory %s: %v", uri.Path, err)
}
} else {
// we are downloading a file
log.Debug("downloading file/path from a manifest", "uri.Addr", uri.Addr, "uri.Path", uri.Path)
err := client.DownloadFile(uri.Addr, uri.Path, dest, credentials)
if err != nil {
if err == swarm.ErrUnauthorized {
return err
}
return fmt.Errorf("file %s from address: %s: %v", uri.Path, uri.Addr, err)
}
}
return nil
}
if passwords := makePasswordList(ctx); passwords != nil {
password := getPassPhrase(fmt.Sprintf("Downloading %s is restricted", uri), 0, passwords)
err = dl(password)
} else {
err = dl("")
}
if err != nil {
utils.Fatalf("download: %v", err)
}
}
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