func (a *BuyActivity) sendMissingChunksAndReturnResult(log bitwrk.Logger, client *http.Client, wishList []byte) (io.ReadCloser, error) {
// Send data of missing chunks to seller
pipeIn, pipeOut := io.Pipe()
defer pipeIn.Close()
mwriter := multipart.NewWriter(pipeOut)
// Write work chunks into pipe for HTTP request
go func() {
defer pipeOut.Close()
if part, err := mwriter.CreateFormFile("chunkdata", "chunkdata.bin"); err != nil {
pipeOut.CloseWithError(err)
return
} else if err := cafs.WriteRequestedChunks(a.workFile, wishList, part); err != nil {
pipeOut.CloseWithError(err)
return
}
if err := mwriter.Close(); err != nil {
pipeOut.CloseWithError(err)
return
}
log.Printf("Missing chunk data transmitted successfully.")
}()
if r, err := a.postToSeller(pipeIn, mwriter.FormDataContentType(), client); err != nil {
return nil, fmt.Errorf("Error sending work chunk data to seller: %v", err)
} else {
return r, nil
}
}
func (a *BuyActivity) sendMissingChunksAndReturnResult(log bitwrk.Logger, client *http.Client, wishList []byte, compressed bool) (io.ReadCloser, error) {
// Send data of missing chunks to seller
pipeIn, pipeOut := io.Pipe()
defer pipeIn.Close()
// Setup compression layer with dummy impl in case of uncompressed transmisison
var compressor io.Writer
var closeCompressor func() error
if compressed {
c := gzip.NewWriter(pipeOut)
compressor = c
closeCompressor = c.Close
} else {
compressor = pipeOut
closeCompressor = func() error { return nil }
}
mwriter := multipart.NewWriter(compressor)
// Communicate status back
progressCallback := func(bytesToTransfer, bytesTransferred uint64) {
a.execSync(func() {
a.bytesToTransfer = bytesToTransfer
a.bytesTransferred = bytesTransferred
})
}
// Write work chunks into pipe for HTTP request
go func() {
defer pipeOut.Close()
if part, err := mwriter.CreateFormFile("chunkdata", "chunkdata.bin"); err != nil {
pipeOut.CloseWithError(err)
return
} else if err := cafs.WriteRequestedChunks(a.workFile, wishList, part, progressCallback); err != nil {
pipeOut.CloseWithError(err)
return
}
if err := mwriter.Close(); err != nil {
pipeOut.CloseWithError(err)
return
}
if err := closeCompressor(); err != nil {
pipeOut.CloseWithError(err)
return
}
log.Printf("Missing chunk data transmitted successfully.")
}()
if r, err := a.postToSeller(pipeIn, mwriter.FormDataContentType(), compressed, client); err != nil {
return nil, fmt.Errorf("Error sending work chunk data to seller: %v", err)
} else {
return r, nil
}
}