Examples of org.springframework.web.servlet.FlashMap

org.springframework.web.servlet.FlashMap
A FlashMap provides a way for one request to store attributes intended for use in another. This is most commonly needed when redirecting from one URL to another -- e.g. the Post/Redirect/Get pattern. A FlashMap is saved before the redirect (typically in the session) and is made available after the redirect and removed immediately.
A FlashMap can be set up with a request path and request parameters to help identify the target request. Without this information, a FlashMap is made available to the next request, which may or may not be the intended recipient. On a redirect, the target URL is known and for example {@code org.springframework.web.servlet.view.RedirectView} has theopportunity to automatically update the current FlashMap with target URL information.
Annotated controllers will usually not use this type directly. See {@code org.springframework.web.servlet.mvc.support.RedirectAttributes}for an overview of using flash attributes in annotated controllers. @author Rossen Stoyanchev @since 3.1 @see FlashMapManager

    assertEquals("/once upon a time", flashMap.getTargetRequestPath());
  }


  @Test
  public void saveOutputFlashMapNormalizeTargetPath() throws InterruptedException {
    FlashMap flashMap = new FlashMap();
    flashMap.put("key", "value");


    flashMap.setTargetRequestPath(".");
    this.request.setRequestURI("/once/upon/a/time");
    this.flashMapManager.saveOutputFlashMap(flashMap, this.request, this.response);


    assertEquals("/once/upon/a", flashMap.getTargetRequestPath());


    flashMap.setTargetRequestPath("./");
    this.request.setRequestURI("/once/upon/a/time");
    this.flashMapManager.saveOutputFlashMap(flashMap, this.request, this.response);


    assertEquals("/once/upon/a/", flashMap.getTargetRequestPath());


    flashMap.setTargetRequestPath("..");
    this.request.setRequestURI("/once/upon/a/time");
    this.flashMapManager.saveOutputFlashMap(flashMap, this.request, this.response);


    assertEquals("/once/upon", flashMap.getTargetRequestPath());


    flashMap.setTargetRequestPath("../");
    this.request.setRequestURI("/once/upon/a/time");
    this.flashMapManager.saveOutputFlashMap(flashMap, this.request, this.response);


    assertEquals("/once/upon/", flashMap.getTargetRequestPath());


    flashMap.setTargetRequestPath("../../only");
    this.request.setRequestURI("/once/upon/a/time");
    this.flashMapManager.saveOutputFlashMap(flashMap, this.request, this.response);


    assertEquals("/once/only", flashMap.getTargetRequestPath());
  }

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  @Test
  public void saveOutputFlashMapDecodeParameters() throws Exception {
    this.request.setCharacterEncoding("UTF-8");


    FlashMap flashMap = new FlashMap();
    flashMap.put("anyKey", "anyValue");


    flashMap.addTargetRequestParam("key", "%D0%90%D0%90");
    flashMap.addTargetRequestParam("key", "%D0%91%D0%91");
    flashMap.addTargetRequestParam("key", "%D0%92%D0%92");
    flashMap.addTargetRequestParam("%3A%2F%3F%23%5B%5D%40", "value");
    this.flashMapManager.saveOutputFlashMap(flashMap, this.request, this.response);


    MultiValueMap<String,String> targetRequestParams = flashMap.getTargetRequestParams();
    assertEquals(Arrays.asList("\u0410\u0410", "\u0411\u0411", "\u0412\u0412"), targetRequestParams.get("key"));
    assertEquals(Arrays.asList("value"), targetRequestParams.get(":/?#[]@"));
  }

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    this.handlerAdapter.setArgumentResolvers(Arrays.asList(redirectAttributesResolver, modelResolver));
    this.handlerAdapter.setReturnValueHandlers(Arrays.asList(viewHandler));
    this.handlerAdapter.setIgnoreDefaultModelOnRedirect(true);
    this.handlerAdapter.afterPropertiesSet();


    this.request.setAttribute(DispatcherServlet.OUTPUT_FLASH_MAP_ATTRIBUTE, new FlashMap());


    HandlerMethod handlerMethod = handlerMethod(new RedirectAttributeController(), "handle", Model.class);
    ModelAndView mav = this.handlerAdapter.handle(request, response, handlerMethod);


    assertTrue("Without RedirectAttributes arg, model should be empty", mav.getModel().isEmpty());

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    }
    for (String name : this.sessionAttributes.keySet()) {
      request.getSession().setAttribute(name, this.sessionAttributes.get(name));
    }


    FlashMap flashMap = new FlashMap();
    flashMap.putAll(this.flashAttributes);


    FlashMapManager flashMapManager = getFlashMapManager(request);
    flashMapManager.saveOutputFlashMap(flashMap, request, new MockHttpServletResponse());


    request.setAsyncSupported(true);

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  public void attribute_incorrectValue() throws Exception {
    new FlashAttributeResultMatchers().attribute("good", "not good").match(getStubMvcResult());
  }


  private StubMvcResult getStubMvcResult() {
    FlashMap flashMap = new FlashMap();
    flashMap.put("good", "good");
    StubMvcResult mvcResult = new StubMvcResult(null, null, null, null, null, flashMap, null);
    return mvcResult;
  }

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    assertValue("FlashMap", "Type", null);
  }


  @Test
  public void testFlashMap() throws Exception {
    FlashMap flashMap = new FlashMap();
    flashMap.put("attrName", "attrValue");
    this.request.setAttribute(DispatcherServlet.class.getName() + ".OUTPUT_FLASH_MAP", flashMap);


    this.handler.handle(this.mvcResult);


    assertValue("FlashMap", "Attribute", "attrName");

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  @Test
  public void flashAttribute() {
    this.builder.flashAttr("foo", "bar");
    MockHttpServletRequest request = this.builder.buildRequest(this.servletContext);


    FlashMap flashMap = new SessionFlashMapManager().retrieveAndUpdate(request, null);
    assertNotNull(flashMap);
    assertEquals("bar", flashMap.get("foo"));
  }

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