Examples with FileResourceStorageStatus org.hisp.dhis.fileresource.FileResourceStorageStatus used on opensource projects

Example 1 with FileResourceStorageStatus

use of org.hisp.dhis.fileresource.FileResourceStorageStatus in project dhis2-core by dhis2.

the class DataValueController method getDataValueFile.

// ---------------------------------------------------------------------
// GET file
// ---------------------------------------------------------------------
@RequestMapping(value = "/files", method = RequestMethod.GET)
public void getDataValueFile(@RequestParam String de, @RequestParam(required = false) String co, @RequestParam(required = false) String cc, @RequestParam(required = false) String cp, @RequestParam String pe, @RequestParam String ou, HttpServletResponse response, HttpServletRequest request) throws WebMessageException {
    // ---------------------------------------------------------------------
    // Input validation
    // ---------------------------------------------------------------------
    DataElement dataElement = getAndValidateDataElement(de);
    if (!dataElement.isFileType()) {
        throw new WebMessageException(WebMessageUtils.conflict("DataElement must be of type file"));
    }
    DataElementCategoryOptionCombo categoryOptionCombo = getAndValidateCategoryOptionCombo(co, false);
    DataElementCategoryOptionCombo attributeOptionCombo = getAndValidateAttributeOptionCombo(cc, cp);
    Period period = getAndValidatePeriod(pe);
    OrganisationUnit organisationUnit = getAndValidateOrganisationUnit(ou);
    // ---------------------------------------------------------------------
    // Get data value
    // ---------------------------------------------------------------------
    DataValue dataValue = dataValueService.getDataValue(dataElement, period, organisationUnit, categoryOptionCombo, attributeOptionCombo);
    if (dataValue == null) {
        throw new WebMessageException(WebMessageUtils.conflict("Data value does not exist"));
    }
    // ---------------------------------------------------------------------
    // Get file resource
    // ---------------------------------------------------------------------
    String uid = dataValue.getValue();
    FileResource fileResource = fileResourceService.getFileResource(uid);
    if (fileResource == null || fileResource.getDomain() != FileResourceDomain.DATA_VALUE) {
        throw new WebMessageException(WebMessageUtils.notFound("A data value file resource with id " + uid + " does not exist."));
    }
    FileResourceStorageStatus storageStatus = fileResource.getStorageStatus();
    if (storageStatus != FileResourceStorageStatus.STORED) {
        // Special case:
        //  The FileResource exists and has been tied to this DataValue, however, the underlying file
        //  content is still not stored to the (most likely external) file store provider.
        // HTTP 409, for lack of a more suitable status code
        WebMessage webMessage = WebMessageUtils.conflict("The content is being processed and is not available yet. Try again later.", "The content requested is in transit to the file store and will be available at a later time.");
        webMessage.setResponse(new FileResourceWebMessageResponse(fileResource));
        throw new WebMessageException(webMessage);
    }
    ByteSource content = fileResourceService.getFileResourceContent(fileResource);
    if (content == null) {
        throw new WebMessageException(WebMessageUtils.notFound("The referenced file could not be found"));
    }
    // ---------------------------------------------------------------------
    // Attempt to build signed URL request for content and redirect
    // ---------------------------------------------------------------------
    URI signedGetUri = fileResourceService.getSignedGetFileResourceContentUri(uid);
    if (signedGetUri != null) {
        response.setStatus(HttpServletResponse.SC_TEMPORARY_REDIRECT);
        response.setHeader(HttpHeaders.LOCATION, signedGetUri.toASCIIString());
        return;
    }
    // ---------------------------------------------------------------------
    // Build response and return
    // ---------------------------------------------------------------------
    response.setContentType(fileResource.getContentType());
    response.setContentLength(new Long(fileResource.getContentLength()).intValue());
    response.setHeader(HttpHeaders.CONTENT_DISPOSITION, "filename=" + fileResource.getName());
    // ---------------------------------------------------------------------
    // Request signing is not available, stream content back to client
    // ---------------------------------------------------------------------
    InputStream inputStream = null;
    try {
        inputStream = content.openStream();
        IOUtils.copy(inputStream, response.getOutputStream());
    } catch (IOException e) {
        throw new WebMessageException(WebMessageUtils.error("Failed fetching the file from storage", "There was an exception when trying to fetch the file from the storage backend. " + "Depending on the provider the root cause could be network or file system related."));
    } finally {
        IOUtils.closeQuietly(inputStream);
    }
}