private Source getTransferStream(Response response) throws IOException {
if (!HttpEngine.hasBody(response)) {
return httpConnection.newFixedLengthSource(0);
}
if ("chunked".equalsIgnoreCase(response.header("Transfer-Encoding"))) {
return httpConnection.newChunkedSource(httpEngine);
}
long contentLength = OkHeaders.contentLength(response);
if (contentLength != -1) {
return httpConnection.newFixedLengthSource(contentLength);
}
// Wrap the input stream from the connection (rather than just returning
// "socketIn" directly here), so that we can control its use after the
// reference escapes.
return httpConnection.newUnknownLengthSource();
}
@Override
public ResponseBody openResponseBody(Response response) throws IOException {
Source source = getTransferStream(response);
return new RealResponseBody(response.headers(), Okio.buffer(source));
}