Examples of org.springframework.web.servlet.support.RequestContext

Package org.springframework.web.servlet.support

Examples of org.springframework.web.servlet.support.RequestContext

org.springframework.web.servlet.support.RequestContext
Context holder for request-specific state, like current web application context, current locale, current theme, and potential binding errors. Provides easy access to localized messages and Errors instances.
Suitable for exposition to views, and usage within JSP's "useBean" tag, JSP scriptlets, JSTL EL, Velocity templates, etc. Necessary for views that do not have access to the servlet request, like Velocity templates.
Can be instantiated manually, or automatically exposed to views as model attribute via AbstractView's "requestContextAttribute" property.
Will also work outside of DispatcherServlet requests, accessing the root WebApplicationContext and using an appropriate fallback for the locale (the HttpServletRequest's primary locale). @author Juergen Hoeller @since 03.03.2003 @see org.springframework.web.servlet.DispatcherServlet @see org.springframework.web.servlet.view.AbstractView#setRequestContextAttribute @see org.springframework.web.servlet.view.UrlBasedViewResolver#setRequestContextAttribute @see #getFallbackLocale()

   * @return the updated URL or the same as URL as the one passed in
   */
  protected String updateTargetUrl(String targetUrl, Map<String, Object> model,
      HttpServletRequest request, HttpServletResponse response) {


    RequestContext requestContext = null;
    if (getWebApplicationContext() != null) {
      requestContext = createRequestContext(request, response, model);
    }
    else {
      WebApplicationContext wac = ContextLoader.getCurrentWebApplicationContext();
      if (wac != null && wac.getServletContext() != null) {
        requestContext = new RequestContext(request, response, wac.getServletContext(), model);
      }
    }
    if (requestContext != null) {
      RequestDataValueProcessor processor = requestContext.getRequestDataValueProcessor();
      if (processor != null) {
        targetUrl = processor.processUrl(request, targetUrl);
      }
    }
    return targetUrl;

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            "Cannot expose bind macro helper '" + SPRING_MACRO_REQUEST_CONTEXT_ATTRIBUTE +
            "' because of an existing model object of the same name");
      }
      // Expose RequestContext instance for Spring macros.
      model.put(SPRING_MACRO_REQUEST_CONTEXT_ATTRIBUTE,
          new RequestContext(request, response, getServletContext(), model));
    }


    applyContentType(response);


    renderMergedTemplateModel(model, request, response);

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  protected void renderMergedOutputModel(Map<String, Object> model, HttpServletRequest request,
      HttpServletResponse response) throws Exception {


    exposeModelAsRequestAttributes(model, request);
    if (this.exposeJstlAttributes) {
      JstlUtils.exposeLocalizationContext(new RequestContext(request, getServletContext()));
    }
    if (this.alwaysInclude) {
      request.setAttribute(AbstractRequest.FORCE_INCLUDE_ATTRIBUTE_NAME, true);
    }

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    assertEquals("Correct doEndTag return value", Tag.EVAL_PAGE, tag.doEndTag());
  }


  public void testRequestContext() throws ServletException {
    PageContext pc = createPageContext();
    RequestContext rc = new RequestContext((HttpServletRequest) pc.getRequest(), pc.getServletContext());
    assertEquals("test message", rc.getMessage("test"));
    assertEquals("test message", rc.getMessage("test", (Object[]) null));
    assertEquals("test message", rc.getMessage("test", "default"));
    assertEquals("test message", rc.getMessage("test", (Object[]) null, "default"));
    assertEquals("test arg1 message arg2",
        rc.getMessage("testArgs", new String[] {"arg1", "arg2"}, "default"));
    assertEquals("test arg1 message arg2",
        rc.getMessage("testArgs", Arrays.asList(new String[] {"arg1", "arg2"}), "default"));
    assertEquals("default", rc.getMessage("testa", "default"));
    assertEquals("default", rc.getMessage("testa", (List) null, "default"));
    MessageSourceResolvable resolvable = new DefaultMessageSourceResolvable(new String[] {"test"});
    assertEquals("test message", rc.getMessage(resolvable));
  }

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      @Override
      protected void processTemplate(Template template, SimpleHash fmModel, HttpServletResponse response)
          throws TemplateException {
        Map model = fmModel.toMap();
        assertTrue(model.get(FreeMarkerView.SPRING_MACRO_REQUEST_CONTEXT_ATTRIBUTE) instanceof RequestContext);
        RequestContext rc = (RequestContext) model.get(FreeMarkerView.SPRING_MACRO_REQUEST_CONTEXT_ATTRIBUTE);
        BindStatus status = rc.getBindStatus("tb.name");
        assertEquals("name", status.getExpression());
        assertEquals("juergen", status.getValue());
      }
    };
    fv.setUrl(TEMPLATE_FILE);

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  public void testExposeSpringMacroHelpers() throws Exception {
    VelocityView vv = new VelocityView() {
      @Override
      protected void mergeTemplate(Template template, Context context, HttpServletResponse response) {
        assertTrue(context.get(VelocityView.SPRING_MACRO_REQUEST_CONTEXT_ATTRIBUTE) instanceof RequestContext);
        RequestContext rc = (RequestContext) context.get(VelocityView.SPRING_MACRO_REQUEST_CONTEXT_ATTRIBUTE);
        BindStatus status = rc.getBindStatus("tb.name");
        assertEquals("name", status.getExpression());
        assertEquals("juergen", status.getValue());
      }
    };
    vv.setUrl(TEMPLATE_FILE);

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    assertEquals("theme test message", message.toString());
  }


  public void testRequestContext() throws ServletException {
    PageContext pc = createPageContext();
    RequestContext rc = new RequestContext((HttpServletRequest) pc.getRequest());
    assertEquals("theme test message", rc.getThemeMessage("themetest"));
    assertEquals("theme test message", rc.getThemeMessage("themetest", (String[]) null));
    assertEquals("theme test message", rc.getThemeMessage("themetest", "default"));
    assertEquals("theme test message", rc.getThemeMessage("themetest", (Object[]) null, "default"));
    assertEquals("theme test message arg1",
        rc.getThemeMessage("themetestArgs", new String[] {"arg1"}));
    assertEquals("theme test message arg1",
        rc.getThemeMessage("themetestArgs", Arrays.asList(new String[] {"arg1"})));
    assertEquals("default", rc.getThemeMessage("themetesta", "default"));
    assertEquals("default", rc.getThemeMessage("themetesta", (List) null, "default"));
    MessageSourceResolvable resolvable = new DefaultMessageSourceResolvable(new String[] {"themetest"});
    assertEquals("theme test message", rc.getThemeMessage(resolvable));
  }

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    MockHttpServletRequest request = (MockHttpServletRequest) pageContext.getRequest();
    StaticWebApplicationContext wac = (StaticWebApplicationContext) RequestContextUtils.getWebApplicationContext(request);
    wac.registerSingleton("requestDataValueProcessor", RequestDataValueProcessorWrapper.class);
    extendRequest(request);
    extendPageContext(pageContext);
    RequestContext requestContext = new JspAwareRequestContext(pageContext);
    pageContext.setAttribute(RequestContextAwareTag.REQUEST_CONTEXT_PAGE_ATTRIBUTE, requestContext);
    return pageContext;
  }

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    Map model = new HashMap();
    model.put(BindingResult.MODEL_KEY_PREFIX + COMMAND_NAME, errors);


    // replace the request context with one containing the errors
    MockPageContext pageContext = getPageContext();
    RequestContext context = new RequestContext((HttpServletRequest) pageContext.getRequest(), model);
    pageContext.setAttribute(RequestContextAwareTag.REQUEST_CONTEXT_PAGE_ATTRIBUTE, context);
  }

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    Map model = new HashMap();
    model.put(BindingResult.MODEL_KEY_PREFIX + COMMAND_NAME, errors);


    // replace the request context with one containing the errors
    MockPageContext pageContext = getPageContext();
    RequestContext context = new RequestContext((HttpServletRequest) pageContext.getRequest(), model);
    pageContext.setAttribute(RequestContextAwareTag.REQUEST_CONTEXT_PAGE_ATTRIBUTE, context);
  }

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