Example usage for org.springframework.http HttpHeaders setContentType

List of usage examples for org.springframework.http HttpHeaders setContentType

  1. HOME
  2. Java
  3. org.springframework
  4. org.springframework.http.*
  5. HttpHeaders
  6. setContentType

Introduction

In this page you can find the example usage for org.springframework.http HttpHeaders setContentType.

Prototype

public void setContentType(@Nullable MediaType mediaType)

Source Link

Document

Set the MediaType media type of the body, as specified by the Content-Type header.

Usage

From source file:gateway.controller.EventController.java

/**
 * Proxies an ElasticSearch DSL query to the Pz-Workflow component to return a list of Event items.
 * //from   w ww  .  j av  a 2  s.c  o  m
 * @see TBD
 * 
 * @return The list of Event items matching the query.
 */
@RequestMapping(value = "/event/query", method = RequestMethod.POST, produces = MediaType.APPLICATION_JSON_VALUE)
@ResponseStatus(HttpStatus.OK)
@ApiOperation(value = "Query Events in Piazza Workflow", notes = "Sends a complex query message to the Piazza Workflow component, that allow users to search for Events. Searching is capable of filtering by keywords or other dynamic information.", tags = {
        "Event", "Workflow", "Search" })
@ApiResponses(value = {
        @ApiResponse(code = 200, message = "The list of Event results that match the query string.", response = EventListResponse.class),
        @ApiResponse(code = 400, message = "Bad Request", response = ErrorResponse.class),
        @ApiResponse(code = 401, message = "Unauthorized", response = ErrorResponse.class),
        @ApiResponse(code = 500, message = "Internal Error", response = ErrorResponse.class) })
public ResponseEntity<PiazzaResponse> searchEvents(
        @ApiParam(value = "The Query string for the Workflow component.", required = true) @Valid @RequestBody SearchRequest query,
        @ApiParam(value = "Paginating large datasets. This will determine the starting page for the query.") @RequestParam(value = "page", required = false) Integer page,
        @ApiParam(value = "The number of results to be returned per query.") @RequestParam(value = "perPage", required = false) Integer perPage,
        @ApiParam(value = "Indicates ascending or descending order.") @RequestParam(value = "order", required = false) String order,
        @ApiParam(value = "The data field to sort by.") @RequestParam(value = "sortBy", required = false) String sortBy,
        Principal user) {
    try {
        // Log the request
        logger.log(String.format("User %s sending a complex query for Workflow.",
                gatewayUtil.getPrincipalName(user)), PiazzaLogger.INFO);

        // Send the query to the Pz-Workflow component
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);
        HttpEntity<Object> entity = new HttpEntity<Object>(query, headers);

        String paramPage = (page == null) ? "" : "page=" + page.toString();
        String paramPerPage = (perPage == null) ? "" : "perPage=" + perPage.toString();
        String paramOrder = (order == null) ? "" : "order=" + order;
        String paramSortBy = (sortBy == null) ? "" : "sortBy=" + sortBy;

        EventListResponse searchResponse = restTemplate.postForObject(String.format("%s/%s/%s?%s&%s&%s&%s",
                WORKFLOW_URL, "event", "query", paramPage, paramPerPage, paramOrder, paramSortBy), entity,
                EventListResponse.class);
        // Respond
        return new ResponseEntity<PiazzaResponse>(searchResponse, HttpStatus.OK);
    } catch (Exception exception) {
        String error = String.format("Error Querying Data by user %s: %s", gatewayUtil.getPrincipalName(user),
                exception.getMessage());
        LOGGER.error(error, exception);
        logger.log(error, PiazzaLogger.ERROR);
        return new ResponseEntity<PiazzaResponse>(new ErrorResponse(error, "Gateway"),
                HttpStatus.INTERNAL_SERVER_ERROR);
    }
}

From source file:gateway.controller.EventController.java

/**
 * Proxies an ElasticSearch DSL query to the Pz-Workflow component to return a list of EventType items.
 * //w  ww. ja  v  a  2s. c  o  m
 * @see TBD
 * 
 * @return The list of EventType items matching the query.
 */
@RequestMapping(value = "/eventType/query", method = RequestMethod.POST, produces = MediaType.APPLICATION_JSON_VALUE)
@ResponseStatus(HttpStatus.OK)
@ApiOperation(value = "Query EventTypes in Piazza Workflow", notes = "Sends a complex query message to the Piazza Workflow component, that allow users to search for EventTypes. Searching is capable of filtering by keywords or other dynamic information.", tags = {
        "EventType", "Workflow", "Search" })
@ApiResponses(value = {
        @ApiResponse(code = 200, message = "The list of EventType results that match the query string.", response = EventTypeListResponse.class),
        @ApiResponse(code = 400, message = "Bad Request", response = ErrorResponse.class),
        @ApiResponse(code = 401, message = "Unauthorized", response = ErrorResponse.class),
        @ApiResponse(code = 500, message = "Internal Error", response = ErrorResponse.class) })
public ResponseEntity<PiazzaResponse> searchEventTypes(
        @ApiParam(value = "The Query string for the Workflow component.", required = true) @Valid @RequestBody SearchRequest query,
        @ApiParam(value = "Paginating large datasets. This will determine the starting page for the query.") @RequestParam(value = "page", required = false) Integer page,
        @ApiParam(value = "The number of results to be returned per query.") @RequestParam(value = "perPage", required = false) Integer perPage,
        @ApiParam(value = "Indicates ascending or descending order.") @RequestParam(value = "order", required = false) String order,
        @ApiParam(value = "The data field to sort by.") @RequestParam(value = "sortBy", required = false) String sortBy,
        Principal user) {
    try {
        // Log the request
        logger.log(String.format("User %s sending a complex query for Workflow.",
                gatewayUtil.getPrincipalName(user)), PiazzaLogger.INFO);

        // Send the query to the Pz-Workflow component
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);
        HttpEntity<Object> entity = new HttpEntity<Object>(query, headers);

        String paramPage = (page == null) ? "" : "page=" + page.toString();
        String paramPerPage = (perPage == null) ? "" : "perPage=" + perPage.toString();
        String paramOrder = (order == null) ? "" : "order=" + order;
        String paramSortBy = (sortBy == null) ? "" : "sortBy=" + sortBy;

        EventTypeListResponse searchResponse = restTemplate.postForObject(String.format("%s/%s/%s?%s&%s&%s&%s",
                WORKFLOW_URL, "eventType", "query", paramPage, paramPerPage, paramOrder, paramSortBy), entity,
                EventTypeListResponse.class);
        // Respond
        return new ResponseEntity<PiazzaResponse>(searchResponse, HttpStatus.OK);
    } catch (Exception exception) {
        String error = String.format("Error Querying Data by user %s: %s", gatewayUtil.getPrincipalName(user),
                exception.getMessage());
        LOGGER.error(error, exception);
        logger.log(error, PiazzaLogger.ERROR);
        return new ResponseEntity<PiazzaResponse>(new ErrorResponse(error, "Gateway"),
                HttpStatus.INTERNAL_SERVER_ERROR);
    }
}

From source file:io.seldon.client.services.ApiServiceImpl.java

private ResourceBean getTokenResource(String url) {
    ResourceBean bean;/*from   w w w.ja  va 2  s.c o  m*/
    HttpHeaders headers = new HttpHeaders();
    headers.setContentType(MediaType.APPLICATION_JSON);
    HttpEntity<String> entity = new HttpEntity<String>(headers);
    try {
        ResponseEntity<TokenBean> res = new RestTemplate().exchange(url, HttpMethod.GET, entity,
                TokenBean.class);
        bean = res.getBody();
    } catch (Exception e) {
        HttpEntity<ErrorBean> res = new RestTemplate().exchange(url, HttpMethod.GET, entity, ErrorBean.class);
        bean = res.getBody();
    }
    return bean;
}

From source file:org.apigw.authserver.web.controller.ApplicationManagementController.java

@RequestMapping(value = "/app/image", method = RequestMethod.GET, params = { "id" })
public ResponseEntity<byte[]> getIcon(@RequestParam("id") Long id) {
    Application application = appManagement.getApplication(id);

    if (application == null) {
        throw new IllegalArgumentException("No application found with id " + id);
    }/*from  www .jav a 2s  . c om*/
    byte[] content = application.getIcon();
    HttpHeaders headers = new HttpHeaders();
    headers.setContentType(MediaType.IMAGE_JPEG);
    return new ResponseEntity<byte[]>(content, headers, HttpStatus.OK);
}

From source file:io.seldon.client.services.ApiServiceImpl.java

private ResourceBean performPostGet(final String endpointUrl, final ResourceBean resourceBean, Class c) {
    ResourceBean bean;//w w  w  .  j a  v a  2 s  .com
    if (token == null) {
        ResourceBean r = getToken();
        if (r instanceof ErrorBean)
            return r;
    }
    String url = endpointUrl + "&oauth_token=" + token;
    //header
    HttpHeaders headers = new HttpHeaders();
    headers.setContentType(MediaType.APPLICATION_JSON);
    HttpEntity<ResourceBean> entity = new HttpEntity<ResourceBean>(resourceBean, headers);
    RestTemplate template = createRestTemplate();
    try {
        logger.debug("* Posting: " + resourceBean);
        logger.debug("** Endpoint: " + url);
        // API return types for posts vary: Map on success, ErrorBean on failure -- we're forced to use Object here:
        ResponseEntity<ResourceBean> responseEntity;
        responseEntity = template.postForEntity(url, entity, c);
        bean = responseEntity.getBody();
    } catch (Exception e) {
        if (e.getCause() instanceof SocketTimeoutException) {
            return createTimeoutBean();
        }
        logger.error("Exception class: " + e.getClass());
        //logger.error("Failed Api Call for url: " + urlWithToken + " : " + e.toString());
        logger.error("*** NOK (" + url + "): " + e.getMessage());
        HttpEntity<ErrorBean> res;
        try {
            res = template.postForEntity(url, entity, ErrorBean.class);
        } catch (ResourceAccessException rae) {
            return createTimeoutBean();
        }
        bean = res.getBody();
    }
    if (bean instanceof ErrorBean) {
        if (((ErrorBean) bean).getError_id() != Constants.TOKEN_EXPIRED) {
            return bean;
        } else {
            logger.info("Token expired; fetching a new one.");
            ResourceBean r = getToken();
            if (r instanceof ErrorBean) {
                return r;
            } else {
                return performPostGet(endpointUrl, resourceBean, c);
            }
        }
    } else {
        return bean;
    }
}

From source file:io.seldon.client.services.ApiServiceImpl.java

private ResourceBean getResource(final String url, Class<?> c) {
    logger.info("* GET Endpoint: " + url);
    ResourceBean bean;//from  w  ww .j  av  a2  s .c om
    if (token == null) {
        ResourceBean r = getToken();
        if (r instanceof ErrorBean)
            return r;
    }

    String urlWithToken = url + "&oauth_token=" + token;
    logger.debug("** Token: " + token);
    logger.debug("** Class: " + c.getName());
    HttpHeaders headers = new HttpHeaders();
    headers.setContentType(MediaType.APPLICATION_JSON);
    HttpEntity<String> entity = new HttpEntity<String>(headers);
    RestTemplate restTemplate = createRestTemplate();
    try {
        //logger.info("Calling end point: " + urlWithToken + " for class: " + c.getName());
        @SuppressWarnings("unchecked")
        HttpEntity<ResourceBean> res = (HttpEntity<ResourceBean>) restTemplate.exchange(urlWithToken,
                HttpMethod.GET, entity, c);
        logger.debug("Result: " + res.toString() + " : " + res.getBody());
        bean = res.getBody();
        logger.debug("*** OK (" + urlWithToken + ")");
    } catch (Exception e) {
        if (e.getCause() instanceof SocketTimeoutException) {
            return createTimeoutBean();
        }
        logger.error("Exception class: " + e.getClass());
        //logger.error("Failed Api Call for url: " + urlWithToken + " : " + e.toString());
        logger.error("*** NOK (" + urlWithToken + "): " + e.getMessage());
        HttpEntity<ErrorBean> res = null;
        try {
            res = restTemplate.exchange(urlWithToken, HttpMethod.GET, entity, ErrorBean.class);
        } catch (RestClientException e1) {
            if (e1.getCause() instanceof SocketTimeoutException) {
                return createTimeoutBean();
            }
        }
        bean = res.getBody();
    }
    if (bean instanceof ErrorBean) {
        if (((ErrorBean) bean).getError_id() != Constants.TOKEN_EXPIRED) {
            return bean;
        } else {
            logger.info("Token expired; fetching a new one.");
            ResourceBean r = getToken();
            if (r instanceof ErrorBean) {
                return r;
            } else {
                return getResource(url, c);
            }
        }
    } else {
        return bean;
    }
}

From source file:com.javafxpert.wikibrowser.WikiVisGraphController.java

/**
 * Calls the Neo4j Transactional Cypher service and returns an object that holds results
 * @param neoCypherUrl/*from  w  ww. j a  v a 2  s  .  c  o  m*/
 * @param postString
 * @return
 */
private VisGraphResponseNear queryProcessSearchResponse(String neoCypherUrl, String postString) {
    log.info("neoCypherUrl: " + neoCypherUrl);
    log.info("postString: " + postString);

    RestTemplate restTemplate = new RestTemplate();

    HttpHeaders httpHeaders = WikiBrowserUtils.createHeaders(wikiBrowserProperties.getCypherUsername(),
            wikiBrowserProperties.getCypherPassword());

    httpHeaders.setContentType(MediaType.APPLICATION_JSON);
    httpHeaders.setAccept(Arrays.asList(MediaType.APPLICATION_JSON));

    HttpEntity request = new HttpEntity(postString, httpHeaders);

    GraphResponseFar graphResponseFar = null;
    VisGraphResponseNear visGraphResponseNear = new VisGraphResponseNear();
    try {
        ResponseEntity<GraphResponseFar> result = restTemplate.exchange(neoCypherUrl, HttpMethod.POST, request,
                GraphResponseFar.class);
        graphResponseFar = result.getBody();
        log.info("graphResponseFar: " + graphResponseFar);

        // Populate VisGraphResponseNear instance from GraphResponseFar instance
        HashMap<String, VisGraphNodeNear> visGraphNodeNearMap = new HashMap<>();
        HashMap<String, VisGraphEdgeNear> visGraphEdgeNearMap = new HashMap<>();

        List<ResultFar> resultFarList = graphResponseFar.getResultFarList();
        if (resultFarList.size() > 0) {
            List<DataFar> dataFarList = resultFarList.get(0).getDataFarList();
            Iterator<DataFar> dataFarIterator = dataFarList.iterator();

            while (dataFarIterator.hasNext()) {
                GraphFar graphFar = dataFarIterator.next().getGraphFar();

                List<GraphNodeFar> graphNodeFarList = graphFar.getGraphNodeFarList();
                Iterator<GraphNodeFar> graphNodeFarIterator = graphNodeFarList.iterator();

                while (graphNodeFarIterator.hasNext()) {
                    GraphNodeFar graphNodeFar = graphNodeFarIterator.next();
                    VisGraphNodeNear visGraphNodeNear = new VisGraphNodeNear();

                    //visGraphNodeNear.setDbId(graphNodeFar.getId());  // Database ID for this node
                    visGraphNodeNear.setDbId(graphNodeFar.getGraphNodePropsFar().getItemId().substring(1));

                    visGraphNodeNear.setTitle(graphNodeFar.getGraphNodePropsFar().getTitle());
                    visGraphNodeNear.setLabelsList(graphNodeFar.getLabelsList());
                    visGraphNodeNear.setItemId(graphNodeFar.getGraphNodePropsFar().getItemId());

                    String itemId = visGraphNodeNear.getItemId();
                    String articleTitle = visGraphNodeNear.getTitle();

                    // Retrieve the article's image
                    String thumbnailUrl = null;

                    String articleLang = "en";
                    // TODO: Add a language property to Item nodes stored in Neo4j that aren't currently in English,
                    //       and use that property to mutate articleTitleLang

                    // First, try to get the thumbnail by ID from cache
                    thumbnailUrl = ThumbnailCache.getThumbnailUrlById(itemId, articleLang);

                    if (thumbnailUrl == null) {
                        // If not available, try to get thumbnail by ID from ThumbnailService
                        try {
                            String thumbnailByIdUrl = this.wikiBrowserProperties
                                    .getThumbnailByIdServiceUrl(itemId, articleLang);
                            thumbnailUrl = new RestTemplate().getForObject(thumbnailByIdUrl, String.class);

                            if (thumbnailUrl != null) {
                                visGraphNodeNear.setImageUrl(thumbnailUrl);
                            } else {
                                // If thumbnail isn't available by ID, try to get thumbnail by article title
                                try {
                                    String thumbnailByTitleUrl = this.wikiBrowserProperties
                                            .getThumbnailByTitleServiceUrl(articleTitle, articleLang);
                                    thumbnailUrl = new RestTemplate().getForObject(thumbnailByTitleUrl,
                                            String.class);

                                    if (thumbnailUrl != null) {
                                        visGraphNodeNear.setImageUrl(thumbnailUrl);
                                    } else {
                                        visGraphNodeNear.setImageUrl("");
                                    }
                                    //log.info("thumbnailUrl:" + thumbnailUrl);
                                } catch (Exception e) {
                                    e.printStackTrace();
                                    log.info("Caught exception when calling /thumbnail?title=" + articleTitle
                                            + " : " + e);
                                }
                            }
                            //log.info("thumbnailUrl:" + thumbnailUrl);
                        } catch (Exception e) {
                            e.printStackTrace();
                            log.info("Caught exception when calling /thumbnail?id=" + itemId + " : " + e);
                        }
                    } else {
                        visGraphNodeNear.setImageUrl(thumbnailUrl);
                    }

                    /*
                    // Check cache for thumbnail
                    thumbnailUrl = ThumbnailCache.getThumbnailUrlById(itemId, articleLang);
                            
                    if (thumbnailUrl != null && thumbnailUrl.length() > 0) {
                      // Thumbnail image found in cache by ID, which is the preferred location
                      visGraphNodeNear.setImageUrl(thumbnailUrl);
                    }
                    else {
                      // Thumbnail image not found in cache by ID, so look with Wikimedia API by article title
                      log.info("Thumbnail not found in cache for itemId: " + itemId + ", lang: " + articleLang + " so looking with Wikimedia API by article title");
                            
                      try {
                        String url = this.wikiBrowserProperties.getThumbnailByTitleServiceUrl(articleTitle, articleLang);
                        thumbnailUrl = new RestTemplate().getForObject(url,
                            String.class);
                            
                        if (thumbnailUrl != null && thumbnailUrl.length() > 0) {
                          visGraphNodeNear.setImageUrl(thumbnailUrl);
                        }
                        else {
                          log.info("Thumbnail not found for articleTitle: " + articleTitle + ", trying by itemId: " + itemId);
                            
                          try {
                            String url = this.wikiBrowserProperties.getThumbnailByIdServiceUrl(itemId, articleLang);
                            thumbnailUrl = new RestTemplate().getForObject(url,
                                String.class);
                            
                            if (thumbnailUrl != null) {
                              visGraphNodeNear.setImageUrl(thumbnailUrl);
                            
                              // Because successful, cache by article title
                              ThumbnailCache.setThumbnailUrlByTitle(articleTitle, articleLang, thumbnailUrl);
                            }
                            else {
                              visGraphNodeNear.setImageUrl("");
                            }
                            //log.info("thumbnailUrl:" + thumbnailUrl);
                          }
                          catch (Exception e) {
                            e.printStackTrace();
                            log.info("Caught exception when calling /thumbnail?id=" + itemId + " : " + e);
                          }
                            
                        }
                        //log.info("thumbnailUrl:" + thumbnailUrl);
                      } catch (Exception e) {
                        e.printStackTrace();
                        log.info("Caught exception when calling /thumbnail?title=" + articleTitle + " : " + e);
                      }
                    }
                    */

                    // Note: The key in the graphNodeNearMap is the Neo4j node id, not the Wikidata item ID
                    visGraphNodeNearMap.put(graphNodeFar.getId(), visGraphNodeNear);
                }

                List<GraphRelationFar> graphRelationFarList = graphFar.getGraphRelationFarList();
                Iterator<GraphRelationFar> graphRelationFarIterator = graphRelationFarList.iterator();

                while (graphRelationFarIterator.hasNext()) {
                    GraphRelationFar graphRelationFar = graphRelationFarIterator.next();
                    VisGraphEdgeNear visGraphEdgeNear = new VisGraphEdgeNear();

                    // Use the Neo4j node ids from the relationship to retrieve the Wikidata Item IDs from the graphNodeNearMap
                    String neo4jStartNodeId = graphRelationFar.getStartNode();
                    String wikidataStartNodeItemId = visGraphNodeNearMap.get(neo4jStartNodeId).getItemId();
                    String neo4jEndNodeId = graphRelationFar.getEndNode();
                    String wikidataEndNodeItemId = visGraphNodeNearMap.get(neo4jEndNodeId).getItemId();

                    //visGraphEdgeNear.setFromDbId(neo4jStartNodeId);
                    visGraphEdgeNear.setFromDbId(wikidataStartNodeItemId.substring(1));

                    //visGraphEdgeNear.setToDbId(neo4jEndNodeId);
                    visGraphEdgeNear.setToDbId(wikidataEndNodeItemId.substring(1));

                    visGraphEdgeNear.setLabel(graphRelationFar.getType());
                    visGraphEdgeNear.setArrowDirection("to");
                    visGraphEdgeNear.setPropId(graphRelationFar.getGraphRelationPropsFar().getPropId());

                    visGraphEdgeNear.setFromItemId(wikidataStartNodeItemId);
                    visGraphEdgeNear.setToItemId(wikidataEndNodeItemId);

                    // Note: The key in the graphLinkNearMap is the Neo4j node id, not the Wikidata item ID
                    visGraphEdgeNearMap.put(graphRelationFar.getId(), visGraphEdgeNear);
                }
            }

            // Create and populate a List of nodes to set into the graphResponseNear instance
            List<VisGraphNodeNear> visGraphNodeNearList = new ArrayList<>();
            visGraphNodeNearMap.forEach((k, v) -> {
                visGraphNodeNearList.add(v);
            });
            visGraphResponseNear.setVisGraphNodeNearList(visGraphNodeNearList);

            // Create and populate a List of links to set into the graphResponseNear instance
            List<VisGraphEdgeNear> visGraphEdgeNearList = new ArrayList<>();
            visGraphEdgeNearMap.forEach((k, v) -> {
                visGraphEdgeNearList.add(v);
            });
            visGraphResponseNear.setVisGraphEdgeNearList(visGraphEdgeNearList);
        }
    } catch (Exception e) {
        e.printStackTrace();
        log.info("Caught exception when calling Neo Cypher service " + e);
    }

    return visGraphResponseNear;
}

From source file:it.geosolutions.opensdi.operations.FolderManagerOperationController.java

/**
 * Download a file with a stream/*www .  ja  v  a 2  s . co m*/
 * 
 * @param resp
 * @param fileName
 * @param filePath
 * @return
 */
@SuppressWarnings("resource")
private ResponseEntity<byte[]> download(HttpServletResponse resp, String fileName, String filePath) {

    final HttpHeaders headers = new HttpHeaders();
    File toServeUp = new File(filePath);
    InputStream inputStream = null;

    try {
        inputStream = new FileInputStream(toServeUp);
    } catch (FileNotFoundException e) {

        // Also useful, this is a good was to serve down an error message
        String msg = "ERROR: Could not find the file specified.";
        headers.setContentType(MediaType.TEXT_PLAIN);
        return new ResponseEntity<byte[]>(msg.getBytes(), headers, HttpStatus.NOT_FOUND);

    }

    resp.setContentType("application/octet-stream");
    resp.setHeader("Content-Disposition", "attachment; filename=\"" + fileName + "\"");

    Long fileSize = toServeUp.length();
    resp.setContentLength(fileSize.intValue());

    OutputStream outputStream = null;

    try {
        outputStream = resp.getOutputStream();
    } catch (IOException e) {
        String msg = "ERROR: Could not generate output stream.";
        headers.setContentType(MediaType.TEXT_PLAIN);
        return new ResponseEntity<byte[]>(msg.getBytes(), headers, HttpStatus.NOT_FOUND);
    }

    byte[] buffer = new byte[1024];

    int read = 0;
    try {

        while ((read = inputStream.read(buffer)) != -1) {
            outputStream.write(buffer, 0, read);
        }

        // close the streams to prevent memory leaks
        outputStream.flush();
        outputStream.close();
        inputStream.close();

    } catch (Exception e) {
        String msg = "ERROR: Could not read file.";
        headers.setContentType(MediaType.TEXT_PLAIN);
        return new ResponseEntity<byte[]>(msg.getBytes(), headers, HttpStatus.NOT_FOUND);
    }

    return null;
}