Spring create a GET Rest Call which downloads a file
How can I implement a simple GET call which downloads a file with Spring?
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1 Answer available
I think the easiest solution is to use the org.springframework.core.io.Resource class provided by Spring. If you wrap it in a ResponseEntity and fill everything with your needed parameters then you should be good to go.
Here is an example:
@GetMapping(value = "/api/file/download")
public ResponseEntity<Resource> downloadFile() {
/* getFileInputStream contains your logic for reading the file */
InputStreamResource resource = new InputStreamResource(getFileInputStream());
return ResponseEntity.ok()
.header("Content-Disposition", "attachment; filename=\"" + fileName + "\"")
.header("Content-Type", contentType) // the mimetype of your file e.g. image/png
.contentLength(contentLength) // the size of your file
.body(resource);
}