How do you read the same inputstream twice? Is it possible to copy it somehow?
I need to get a image from web, save it locally and then return the saved image. I just tought it would be faster to use the same stream instead of starting a new stream to the downloaded content and then read it again.
You can use org.apache.commons.io.IOUtils.copy
to copy the contents of the InputStream to a byte array, and then repeatedly read from the byte array using a ByteArrayInputStream. E.g.:
ByteArrayOutputStream baos = new ByteArrayOutputStream();
org.apache.commons.io.IOUtils.copy(in, baos);
byte[] bytes = baos.toByteArray();
// either
while (needToReadAgain) {
ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
yourReadMethodHere(bais);
}
// or
ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
while (needToReadAgain) {
bais.reset();
yourReadMethodHere(bais);
}