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// The hole command is a CLI uploader tool for the roseh.moe wormhole.
//
// # Magic wormhole
//
// The name is inspired by the original "magic wormhole" library. The goal is to
// get a file from one computer to another without a USB stick, Including cases
// where scp might not be available. This includes transferring files to your
// phone, for example, although a USB cord might still be more convenient when
// moving many files. It should also work over restrictive firewalls. You should
// be able to use the wormhole as long as you can access http://roseh.moe in
// a browser.
//
// # Usage example
//
// The following shows a typical interaction with the tool
//
// $ hole file.pdf
// https://roseh.moe/wormhole/dv-32-ethos-aztec-shako-spoils-2y-dwarf-sand-any
// Waiting for upload...
// <tool hangs, waiting to upload the file>
//
// Then, on another machine:
//
// $ curl https://roseh.moe/wormhole/dv-32-ethos-aztec-shako-spoils-2y-dwarf-sand-any > file.pdf
//
// # Web interface
//
// There's also a web interface available for the wormhole, available at
// https://roseh.moe/wormhole.
package main
import (
"flag"
"fmt"
"io"
"mime/multipart"
"net/http"
"os"
"gitlab.com/rhogenson/roseh.moe/internal/hole"
)
var url = flag.String("url", "https://roseh.moe", "server URL")
func upload() error {
args := flag.Args()
if len(args) == 0 {
return fmt.Errorf("usage error: missing filename")
}
if len(args) > 1 {
return fmt.Errorf("usage error: too many positional arguments")
}
fileName := args[0]
f, err := os.Open(fileName)
if err != nil {
return err
}
defer f.Close()
hole := hole.New()
fmt.Println(*url + "/wormhole/" + hole)
fmt.Fprintln(os.Stderr, "Waiting for upload...")
resp, err := http.Get(*url + "/wormhole/" + hole + "/ready")
if err != nil {
return fmt.Errorf("check wormhole ready: %s", err)
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return fmt.Errorf("check wormhole ready: status: %s", resp.Status)
}
if _, err := io.Copy(io.Discard, resp.Body); err != nil {
return fmt.Errorf("check wormhole ready: read response: %s", err)
}
pipeReader, pipeWriter := io.Pipe()
multipartWriter := multipart.NewWriter(pipeWriter)
go func() {
defer pipeWriter.Close()
part, err := multipartWriter.CreateFormFile("file", fileName)
if err != nil {
pipeWriter.CloseWithError(fmt.Errorf("create multipart reader: %s", err))
return
}
if _, err := io.Copy(part, f); err != nil {
pipeWriter.CloseWithError(fmt.Errorf("write body: %s", err))
return
}
if err := multipartWriter.Close(); err != nil {
pipeWriter.CloseWithError(fmt.Errorf("write trailer: %s", err))
return
}
}()
resp, err = http.Post(*url+"/wormhole/"+hole, multipartWriter.FormDataContentType(), pipeReader)
if err != nil {
return fmt.Errorf("upload: %s", err)
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return fmt.Errorf("upload: status: %s", resp.Status)
}
io.Copy(os.Stderr, resp.Body)
fmt.Fprintln(os.Stderr)
return nil
}
func main() {
flag.Usage = func() {
fmt.Fprint(os.Stderr, `Usage: hole FILE
Create a one-time wormhole that allows a specific client to download a
file. Prints the URL to download the file and then hangs until the file
is downloaded.
Example:
$ hole file.pdf
https://roseh.moe/wormhole/dv-32-ethos-aztec-shako-spoils-2y-dwarf-sand-any
Waiting for upload...
<tool hangs, waiting to upload the file>
Then, on another machine:
$ curl https://roseh.moe/wormhole/dv-32-ethos-aztec-shako-spoils-2y-dwarf-sand-any > file.pdf
Flags:
`)
flag.PrintDefaults()
}
flag.Parse()
if err := upload(); err != nil {
fmt.Fprintf(os.Stderr, "hole: %s\n", err)
os.Exit(1)
}
}
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