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// Copyright 2016 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/>.
// Command bzzup uploads files to the swarm HTTP API.
package main
import (
"errors"
"fmt"
"io"
"io/ioutil"
"mime"
"net/http"
"os"
"os/user"
"path"
"path/filepath"
"strings"
"github.com/ethereum/go-ethereum/cmd/utils"
swarm "github.com/ethereum/go-ethereum/swarm/api/client"
"gopkg.in/urfave/cli.v1"
)
func upload(ctx *cli.Context) {
args := ctx.Args()
var (
bzzapi = strings.TrimRight(ctx.GlobalString(SwarmApiFlag.Name), "/")
recursive = ctx.GlobalBool(SwarmRecursiveUploadFlag.Name)
wantManifest = ctx.GlobalBoolT(SwarmWantManifestFlag.Name)
defaultPath = ctx.GlobalString(SwarmUploadDefaultPath.Name)
fromStdin = ctx.GlobalBool(SwarmUpFromStdinFlag.Name)
mimeType = ctx.GlobalString(SwarmUploadMimeType.Name)
client = swarm.NewClient(bzzapi)
file string
)
if len(args) != 1 {
if fromStdin {
tmp, err := ioutil.TempFile("", "swarm-stdin")
if err != nil {
utils.Fatalf("error create tempfile: %s", err)
}
defer os.Remove(tmp.Name())
n, err := io.Copy(tmp, os.Stdin)
if err != nil {
utils.Fatalf("error copying stdin to tempfile: %s", err)
} else if n == 0 {
utils.Fatalf("error reading from stdin: zero length")
}
file = tmp.Name()
} else {
utils.Fatalf("Need filename as the first and only argument")
}
} else {
file = expandPath(args[0])
}
if !wantManifest {
f, err := swarm.Open(file)
if err != nil {
utils.Fatalf("Error opening file: %s", err)
}
defer f.Close()
hash, err := client.UploadRaw(f, f.Size)
if err != nil {
utils.Fatalf("Upload failed: %s", err)
}
fmt.Println(hash)
return
}
stat, err := os.Stat(file)
if err != nil {
utils.Fatalf("Error opening file: %s", err)
}
// define a function which either uploads a directory or single file
// based on the type of the file being uploaded
var doUpload func() (hash string, err error)
if stat.IsDir() {
doUpload = func() (string, error) {
if !recursive {
return "", errors.New("Argument is a directory and recursive upload is disabled")
}
return client.UploadDirectory(file, defaultPath, "")
}
} else {
doUpload = func() (string, error) {
f, err := swarm.Open(file)
if err != nil {
return "", fmt.Errorf("error opening file: %s", err)
}
defer f.Close()
if mimeType == "" {
mimeType = detectMimeType(file)
}
f.ContentType = mimeType
return client.Upload(f, "")
}
}
hash, err := doUpload()
if err != nil {
utils.Fatalf("Upload failed: %s", err)
}
fmt.Println(hash)
}
// Expands a file path
// 1. replace tilde with users home dir
// 2. expands embedded environment variables
// 3. cleans the path, e.g. /a/b/../c -> /a/c
// Note, it has limitations, e.g. ~someuser/tmp will not be expanded
func expandPath(p string) string {
if strings.HasPrefix(p, "~/") || strings.HasPrefix(p, "~\\") {
if home := homeDir(); home != "" {
p = home + p[1:]
}
}
return path.Clean(os.ExpandEnv(p))
}
func homeDir() string {
if home := os.Getenv("HOME"); home != "" {
return home
}
if usr, err := user.Current(); err == nil {
return usr.HomeDir
}
return ""
}
func detectMimeType(file string) string {
if ext := filepath.Ext(file); ext != "" {
return mime.TypeByExtension(ext)
}
f, err := os.Open(file)
if err != nil {
return ""
}
defer f.Close()
buf := make([]byte, 512)
if n, _ := f.Read(buf); n > 0 {
return http.DetectContentType(buf)
}
return ""
}
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