javax.ws.rs.core.Response#notModified()源码实例Demo

/**
 * Comparison for If-None-Match header and ETag.
 *
 * @param etag
 *         the ETag
 * @return ResponseBuilder with status 412 (precondition failed) if If-None-Match header is MATCH to ETag and HTTP method is not GET or
 * HEAD. If method is GET or HEAD and If-None-Match is MATCH to ETag then ResponseBuilder with status 304 (not modified) will be
 * returned.
 */
private ResponseBuilder evaluateIfNoneMatch(EntityTag etag) {
    String ifNoneMatch = getRequestHeaders().getFirst(IF_NONE_MATCH);

    if (Strings.isNullOrEmpty(ifNoneMatch)) {
        return null;
    }

    EntityTag otherEtag = EntityTag.valueOf(ifNoneMatch);
    String httpMethod = getMethod();
    if (httpMethod.equals(GET) || httpMethod.equals(HEAD)) {
        if (eTagsWeakEqual(etag, otherEtag)) {
            return Response.notModified(etag);
        }
    } else {
        if (eTagsStrongEqual(etag, otherEtag)) {
            return Response.status(PRECONDITION_FAILED);
        }
    }
    return null;
}
 

/**
 * Comparison for lastModified and modifiedSince times.
 *
 * @param lastModified
 *         the last modified time
 * @return ResponseBuilder with status 304 (not modified) if lastModified time is greater then modifiedSince otherwise return null. If
 * date format in header If-Modified-Since is wrong also null returned
 */
private ResponseBuilder evaluateIfModified(long lastModified) {
    String ifModified = getRequestHeaders().getFirst(IF_MODIFIED_SINCE);

    if (isNullOrEmpty(ifModified)) {
        return null;
    }
    try {
        long modifiedSince = HeaderHelper.parseDateHeader(ifModified).getTime();
        if (lastModified <= modifiedSince) {
            return Response.notModified();
        }
    } catch (IllegalArgumentException ignored) {
    }

    return null;
}
 

@Test
public void testPictureResponse() throws IOException, URISyntaxException {
    Request request = Mockito.mock(Request.class);
    doReturn(null).when(request).evaluatePreconditions(any(EntityTag.class));

    InlinePictureEntity mockImage = new InlinePictureEntity();
    byte[] imageContent = Files.readAllBytes(Paths.get(this.getClass().getClassLoader().getResource("media/logo.svg").toURI()));
    mockImage.setContent(imageContent);
    mockImage.setType("image/svg");

    Response response = pictureResourceForTest.createPictureResponse(request, mockImage);

    assertEquals(OK_200, response.getStatus());

    MultivaluedMap<String, Object> headers = response.getHeaders();
    MediaType mediaType = (MediaType) headers.getFirst(HttpHeader.CONTENT_TYPE.asString());
    String etag = ((EntityTag) headers.getFirst("ETag")).getValue();

    assertEquals(mockImage.getType(), mediaType.toString());

    ByteArrayOutputStream baos = (ByteArrayOutputStream)response.getEntity();
    byte[] fileContent = baos.toByteArray();
    assertTrue(Arrays.equals(fileContent, imageContent));

    String expectedTag = Integer.toString(new String(fileContent).hashCode());
    assertEquals(expectedTag, etag);


    // test Cache
    ResponseBuilder responseBuilder = Response.notModified();
    doReturn(responseBuilder).when(request).evaluatePreconditions(any(EntityTag.class));

    final Response cachedResponse = pictureResourceForTest.createPictureResponse(request, mockImage);
    assertEquals(NOT_MODIFIED_304, cachedResponse.getStatus());
}
 

@javax.ws.rs.GET public Response method() {
    Response.ResponseBuilder responseBuilder = Response.accepted();
    responseBuilder = Response.created(URI.create(""));
    responseBuilder = Response.noContent();
    responseBuilder = Response.notAcceptable(new LinkedList<>());
    responseBuilder = Response.notModified();
    responseBuilder = Response.ok();
    responseBuilder = Response.ok(1L, new Variant(MediaType.TEXT_PLAIN_TYPE, Locale.ENGLISH, "UTF-8"));
    responseBuilder = Response.seeOther(URI.create(""));
    responseBuilder = Response.serverError();
    responseBuilder = Response.temporaryRedirect(URI.create(""));

    return responseBuilder.build();
}
 

@javax.ws.rs.GET public Response method() {
    Response.ResponseBuilder responseBuilder = Response.accepted("Hello");
    responseBuilder = Response.notModified(new EntityTag(""));
    responseBuilder = Response.ok(1, MediaType.APPLICATION_XML);

    return responseBuilder.build();
}
 

@javax.ws.rs.GET
public Response method() {
    Response.ResponseBuilder responseBuilder = Response.notModified("");
    responseBuilder = Response.ok(1d, MediaType.APPLICATION_JSON_TYPE);
    responseBuilder = Response.ok(1L, new Variant(MediaType.TEXT_PLAIN_TYPE, Locale.ENGLISH, "UTF-8"));

    return responseBuilder.build();
}