I am writing a spring boot app which has REST apis (using spring mvc framework) that stream audio/video to HTML5 player on the browser. These apis support range requests for the content.
I have run into an issue where the HTML5 video player complains with error ERR_CONTENT_LENGTH_MISMATCH periodically during streaming.
It seems that bytes received from server do not match bytes advertised by server in Content-Length header.
Please advise what could be the root cause of this.
Things that I have researched so far that could potentially solve the issue but haven't in my case:
No buffering in response. No apache in front of tomcat.
Here is my code:
@Api("Player API")
@RestController public class PlayerController {
@Autowired
FetchAssetService fetchAssetService;
@ApiOperation("Get video")
@RequestMapping(value = "player/video/{packageId}/{username}", method = RequestMethod.GET)
public ResponseEntity<StreamingResponseBody> getProxy(@RequestHeader(value="Range", required=false) String range, @PathVariable Long packageId, @PathVariable String username) throws Exception {
Optional<Stream> videoAssetMetaData = fetchAssetService.fetchVideoAssetMetaData(packageId);
if (!videoAssetMetaData.isPresent()) {
throw new AssetNotFoundException("Video asset not found in MPL for package: "+packageId);
}
HttpHeaders httpHeaders = new HttpHeaders();
HttpStatus status = HttpStatus.OK;
Optional<AssetRange> optionalAssetRange = AssetRange.create(range,videoAssetMetaData.get().getLength());
if (optionalAssetRange.isPresent()) {
if (optionalAssetRange.get().isSatisfiable()) {
setSuccessRangeHeaders(httpHeaders,optionalAssetRange.get());
status = HttpStatus.PARTIAL_CONTENT;
} else {
setErrorRangeHeaders(httpHeaders,optionalAssetRange.get());
status = HttpStatus.REQUESTED_RANGE_NOT_SATISFIABLE;
return new ResponseEntity(null,httpHeaders,status);
}
}
setContentHeaders(httpHeaders, “video.mp4");
try {
return new ResponseEntity(fetchAssetService.getStreamingResponseBody(packageId,videoAssetMetaData.get(),optionalAssetRange,username),
httpHeaders,
status);
} catch (Exception ex) {
log.error("Exception while video streaming: package={}, user={}, range={}",packageId,username,range,ex);
throw ex;
}
}
private void setContentHeaders(HttpHeaders httpHeaders, String fileName) {
httpHeaders.add(HttpHeaders.ACCEPT_RANGES,"bytes");
httpHeaders.add(HttpHeaders.CONTENT_TYPE, MediaType.APPLICATION_OCTET_STREAM_VALUE);
httpHeaders.add(HttpHeaders.CONTENT_DISPOSITION,"attachment; filename="+ fileName);
}
private void setSuccessRangeHeaders(HttpHeaders httpHeaders, AssetRange range) {
httpHeaders.add(HttpHeaders.CONTENT_LENGTH, Long.toString(range.getRangeLength()));
httpHeaders.add(HttpHeaders.CONTENT_RANGE, String.format("bytes %d-%d/%d", range.getStart(), range.getEnd(), range.getTotalLength()));
}
private void setErrorRangeHeaders(HttpHeaders httpHeaders, AssetRange range) {
httpHeaders.add(HttpHeaders.CONTENT_RANGE, String.format("bytes */%d", range.getTotalLength()));
}
@ExceptionHandler(AssetNotFoundException.class)
@ResponseStatus(HttpStatus.NOT_FOUND)
public String handleAppException(AssetNotFoundException ex) {
return ex.getMessage();
}
@ExceptionHandler(Exception.class)
@ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
public String handleAppException(Exception ex) {
return ex.getMessage();
}
}
