// 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 (
"bytes"
"encoding/json"
"fmt"
"io"
"io/ioutil"
"log"
"mime"
"net/http"
"os"
"os/user"
"path"
"path/filepath"
"strings"
"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)
)
if len(args) != 1 {
log.Fatal("need filename as the first and only argument")
}
var (
file = args[0]
client = &client{api: bzzapi}
)
fi, err := os.Stat(expandPath(file))
if err != nil {
log.Fatal(err)
}
if fi.IsDir() {
if !recursive {
log.Fatal("argument is a directory and recursive upload is disabled")
}
if !wantManifest {
log.Fatal("manifest is required for directory uploads")
}
mhash, err := client.uploadDirectory(file, defaultPath)
if err != nil {
log.Fatal(err)
}
fmt.Println(mhash)
return
}
entry, err := client.uploadFile(file, fi)
if err != nil {
log.Fatalln("upload failed:", err)
}
mroot := manifest{[]manifestEntry{entry}}
if !wantManifest {
// Print the manifest. This is the only output to stdout.
mrootJSON, _ := json.MarshalIndent(mroot, "", " ")
fmt.Println(string(mrootJSON))
return
}
hash, err := client.uploadManifest(mroot)
if err != nil {
log.Fatalln("manifest upload failed:", 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 ""
}
// client wraps interaction with the swarm HTTP gateway.
type client struct {
api string
}
// manifest is the JSON representation of a swarm manifest.
type manifestEntry struct {
Hash string `json:"hash,omitempty"`
ContentType string `json:"contentType,omitempty"`
Path string `json:"path,omitempty"`
}
// manifest is the JSON representation of a swarm manifest.
type manifest struct {
Entries []manifestEntry `json:"entries,omitempty"`
}
func (c *client) uploadDirectory(dir string, defaultPath string) (string, error) {
mhash, err := c.postRaw("application/json", 2, ioutil.NopCloser(bytes.NewReader([]byte("{}"))))
if err != nil {
return "", fmt.Errorf("failed to upload empty manifest")
}
if len(defaultPath) > 0 {
fi, err := os.Stat(defaultPath)
if err != nil {
return "", err
}
mhash, err = c.uploadToManifest(mhash, "", defaultPath, fi)
if err != nil {
return "", err
}
}
prefix := filepath.ToSlash(filepath.Clean(dir)) + "/"
err = filepath.Walk(dir, func(path string, fi os.FileInfo, err error) error {
if err != nil || fi.IsDir() {
return err
}
if !strings.HasPrefix(path, dir) {
return fmt.Errorf("path %s outside directory %s", path, dir)
}
uripath := strings.TrimPrefix(filepath.ToSlash(filepath.Clean(path)), prefix)
mhash, err = c.uploadToManifest(mhash, uripath, path, fi)
return err
})
return mhash, err
}
func (c *client) uploadFile(file string, fi os.FileInfo) (manifestEntry, error) {
hash, err := c.uploadFileContent(file, fi)
m := manifestEntry{
Hash: hash,
ContentType: mime.TypeByExtension(filepath.Ext(fi.Name())),
}
return m, err
}
func (c *client) uploadFileContent(file string, fi os.FileInfo) (string, error) {
fd, err := os.Open(file)
if err != nil {
return "", err
}
defer fd.Close()
log.Printf("uploading file %s (%d bytes)", file, fi.Size())
return c.postRaw("application/octet-stream", fi.Size(), fd)
}
func (c *client) uploadManifest(m manifest) (string, error) {
jsm, err := json.Marshal(m)
if err != nil {
panic(err)
}
log.Println("uploading manifest")
return c.postRaw("application/json", int64(len(jsm)), ioutil.NopCloser(bytes.NewReader(jsm)))
}
func (c *client) uploadToManifest(mhash string, path string, fpath string, fi os.FileInfo) (string, error) {
fd, err := os.Open(fpath)
if err != nil {
return "", err
}
defer fd.Close()
log.Printf("uploading file %s (%d bytes) and adding path %v", fpath, fi.Size(), path)
req, err := http.NewRequest("PUT", c.api+"/bzz:/"+mhash+"/"+path, fd)
if err != nil {
return "", err
}
req.Header.Set("content-type", mime.TypeByExtension(filepath.Ext(fi.Name())))
req.ContentLength = fi.Size()
resp, err := http.DefaultClient.Do(req)
if err != nil {
return "", err
}
defer resp.Body.Close()
if resp.StatusCode >= 400 {
return "", fmt.Errorf("bad status: %s", resp.Status)
}
content, err := ioutil.ReadAll(resp.Body)
return string(content), err
}
func (c *client) postRaw(mimetype string, size int64, body io.ReadCloser) (string, error) {
req, err := http.NewRequest("POST", c.api+"/bzzr:/", body)
if err != nil {
return "", err
}
req.Header.Set("content-type", mimetype)
req.ContentLength = size
resp, err := http.DefaultClient.Do(req)
if err != nil {
return "", err
}
defer resp.Body.Close()
if resp.StatusCode >= 400 {
return "", fmt.Errorf("bad status: %s", resp.Status)
}
content, err := ioutil.ReadAll(resp.Body)
return string(content), err
}
func (c *client) downloadManifest(mhash string) (manifest, error) {
mroot := manifest{}
req, err := http.NewRequest("GET", c.api+"/bzzr:/"+mhash, nil)
if err != nil {
return mroot, err
}
resp, err := http.DefaultClient.Do(req)
if err != nil {
return mroot, err
}
defer resp.Body.Close()
if resp.StatusCode >= 400 {
return mroot, fmt.Errorf("bad status: %s", resp.Status)
}
content, err := ioutil.ReadAll(resp.Body)
err = json.Unmarshal(content, &mroot)
if err != nil {
return mroot, fmt.Errorf("Manifest %v is malformed: %v", mhash, err)
}
return mroot, err
}
