I am looking for a way to get opened input stream from rest template - I was trying to used ResponseExtractor, but the stream is getting closed before returning, as written here:
https://jira.spring.io/browse/SPR-7357
"Note that you cannot simply return the InputStream from the extractor, because by the time the execute method returns, the underlying connection and stream are already closed"
I hope that there is a way and I will not have to write to my output stream directly in the rest template.
I didn't find a way to do it, the stream is always getting closed. As a workaround I created the following code:
public interface ResourceReader {
void read(InputStream content);
}
with the following implementation:
public class StreamResourceReader implements ResourceReader {
private HttpServletResponse response;
public StreamResourceReader(HttpServletResponse response) {
this.response = response;
}
@Override
public void read(InputStream content) {
try {
IOUtils.copy(content, response.getOutputStream());
} catch (IOException e) {
throw new IllegalStateException(e);
}
}
}
then in controller:
@RequestMapping(value = "document/{objectId}")
public void getDocumentContent(@PathVariable String objectId, HttpServletResponse response) {
ResourceReader reader = new StreamResourceReader(response);
service.readDocumentContent(objectId, reader);
}
call to rest template:
restTemplate.execute(uri, HttpMethod.GET, null,
new StreamResponseExtractor(reader));
and the string response extractor:
@Override
public ResponseEntity extractData(ClientHttpResponse response) throws IOException {
reader.read(response.getBody());
return null;
}
and it works like a charm! :)
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