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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 (
"bytes"
"encoding/json"
"flag"
"fmt"
"io"
"io/ioutil"
"log"
"mime"
"net/http"
"os"
"path/filepath"
"strings"
)
func main() {
var (
bzzapiFlag = flag.String("bzzapi", "http://127.0.0.1:8500", "Swarm HTTP endpoint")
recursiveFlag = flag.Bool("recursive", false, "Upload directories recursively")
manifestFlag = flag.Bool("manifest", true, "Skip automatic manifest upload")
)
log.SetOutput(os.Stderr)
log.SetFlags(0)
flag.Parse()
if flag.NArg() != 1 {
log.Fatal("need filename as the first and only argument")
}
var (
file = flag.Arg(0)
client = &client{api: *bzzapiFlag}
mroot manifest
)
fi, err := os.Stat(file)
if err != nil {
log.Fatal(err)
}
if fi.IsDir() {
if !*recursiveFlag {
log.Fatal("argument is a directory and recursive upload is disabled")
}
mroot, err = client.uploadDirectory(file)
} else {
mroot, err = client.uploadFile(file, fi)
if *manifestFlag {
// Wrap the raw file entry in a proper manifest so both hashes get printed.
mroot = manifest{Entries: []manifest{mroot}}
}
}
if err != nil {
log.Fatalln("upload failed:", err)
}
if *manifestFlag {
hash, err := client.uploadManifest(mroot)
if err != nil {
log.Fatalln("manifest upload failed:", err)
}
mroot.Hash = hash
}
// Print the manifest. This is the only output to stdout.
mrootJSON, _ := json.MarshalIndent(mroot, "", " ")
fmt.Println(string(mrootJSON))
}
// client wraps interaction with the swarm HTTP gateway.
type client struct {
api string
}
// manifest is the JSON representation of a swarm manifest.
type manifest struct {
Hash string `json:"hash,omitempty"`
ContentType string `json:"contentType,omitempty"`
Path string `json:"path,omitempty"`
Entries []manifest `json:"entries,omitempty"`
}
func (c *client) uploadFile(file string, fi os.FileInfo) (manifest, error) {
hash, err := c.uploadFileContent(file, fi)
m := manifest{
Hash: hash,
ContentType: mime.TypeByExtension(filepath.Ext(fi.Name())),
}
return m, err
}
func (c *client) uploadDirectory(dir string) (manifest, error) {
dirm := manifest{}
prefix := filepath.ToSlash(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)
}
entry, err := c.uploadFile(path, fi)
entry.Path = strings.TrimPrefix(filepath.ToSlash(path), prefix)
dirm.Entries = append(dirm.Entries, entry)
return err
})
return dirm, 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) 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
}
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