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package main | |
import ( | |
"io" | |
"log" | |
"mime/multipart" | |
"net/http" | |
"os" | |
"path/filepath" | |
"runtime" | |
"github.com/cheggaaa/pb" | |
) | |
func main() { | |
if len(os.Args) != 2 { | |
log.Println("Usage: pipeUp <filename>\n") | |
os.Exit(1) | |
} | |
input, err := os.Open(os.Args[1]) | |
check(err) | |
defer input.Close() | |
stat, err := input.Stat() | |
check(err) | |
pipeOut, pipeIn := io.Pipe() | |
fsize := stat.Size() | |
bar := pb.New(int(fsize)).SetUnits(pb.U_BYTES) | |
bar.ShowSpeed = true | |
writer := multipart.NewWriter(pipeIn) | |
// do the request concurrently | |
var resp *http.Response | |
done := make(chan error) | |
go func() { | |
// prepare request | |
req, err := http.NewRequest("POST", "http://localhost:9000/upload", pipeOut) | |
if err != nil { | |
done <- err | |
return | |
} | |
req.ContentLength = fsize // filesize | |
req.ContentLength += 227 // multipart header exclouding filename | |
req.ContentLength += int64(len(os.Args[1])) | |
req.ContentLength += 19 | |
req.Header.Set("Content-Type", writer.FormDataContentType()) | |
log.Println("Created Request") | |
bar.Start() | |
resp, err = http.DefaultClient.Do(req) | |
if err != nil { | |
done <- err | |
return | |
} | |
done <- nil | |
}() | |
part, err := writer.CreateFormFile("file", filepath.Base(os.Args[1])) | |
check(err) | |
out := io.MultiWriter(part, bar) | |
_, err = io.Copy(out, input) | |
check(err) | |
check(writer.Close()) | |
check(pipeIn.Close()) // need to close the pipe to | |
check(<-done) | |
bar.FinishPrint("Upload done!") | |
} | |
func check(err error) { | |
_, file, line, _ := runtime.Caller(1) | |
if err != nil { | |
log.Fatalf("Fatal from <%s:%d>\nError:%s", file, line, err) | |
} | |
} |
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