Java Code Examples for javax.servlet.http.HttpServletRequest#getLocale()

@Override
public Locale resolveLocale(HttpServletRequest request) {
	Locale defaultLocale = getDefaultLocale();
	if (defaultLocale != null && request.getHeader("Accept-Language") == null) {
		return defaultLocale;
	}
	Locale requestLocale = request.getLocale();
	List<Locale> supportedLocales = getSupportedLocales();
	if (supportedLocales.isEmpty() || supportedLocales.contains(requestLocale)) {
		return requestLocale;
	}
	Locale supportedLocale = findSupportedLocale(request, supportedLocales);
	if (supportedLocale != null) {
		return supportedLocale;
	}
	return (defaultLocale != null ? defaultLocale : requestLocale);
}
 

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
    StringBuilder bodyHtml = new StringBuilder();
    Locale locale = req.getLocale();
    TimeZone tz = TimeZone.getDefault();
    bodyHtml.append("<table class=\"table table-striped table-bordered table-hover\" style=\"font-size:small;\">");
    bodyHtml.append("<tr><td>" + getMsg("label.timezone.id", req.getLocale()) + "</td>");
    bodyHtml.append("<td>" + tz.getID() + "</td></tr>");
    bodyHtml.append("<tr><td>" + getMsg("label.timezone.name", req.getLocale()) + "</td>");
    bodyHtml.append("<td>" + tz.getDisplayName() + "</td></tr>");
    bodyHtml.append("<tr><td>" + getMsg("label.timezone.offset", req.getLocale()) + "</td>");
    bodyHtml.append("<td>" + tz.getRawOffset() + "</td></tr>");
    bodyHtml.append("</table>");
    try {
        toDoRemove();
        
        bodyHtml.append(getInfoMsg("msg.note.memoryleak3", req.getLocale()));

    } catch (Exception e) {
        log.error("Exception occurs: ", e);
        bodyHtml.append(getErrMsg("msg.unknown.exception.occur", new String[] { e.getMessage() }, locale));
    } finally {
        responseToClient(req, res, getMsg("title.memoryleak3.page", locale), bodyHtml.toString());
    }
}
 

/**
 * 获得国际化信息
 * 
 * @param request
 *            HttpServletRequest
 * @param code
 *            国际化代码
 * @param args
 *            替换参数
 * @return
 * @see org.springframework.context.MessageSource#getMessage(String,
 *      Object[], Locale)
 */
public static String getMessage(HttpServletRequest request, String code,
		Object... args) {
	WebApplicationContext messageSource = RequestContextUtils
			.getWebApplicationContext(request);
	if (messageSource == null) {
		throw new IllegalStateException("WebApplicationContext not found!");
	}
	LocaleResolver localeResolver = RequestContextUtils
			.getLocaleResolver(request);
	Locale locale;
	if (localeResolver != null) {
		locale = localeResolver.resolveLocale(request);
	} else {
		locale = request.getLocale();
	}
	return messageSource.getMessage(code, args, locale);
}
 

@Override
public Locale resolveLocale(HttpServletRequest request) {
	BlogLanguage blogLanguage = (BlogLanguage) request.getAttribute(BlogLanguageMethodArgumentResolver.BLOG_LANGUAGE_ATTRIBUTE);
	if (blogLanguage == null) {
		Blog blog = blogService.getBlogById(Blog.DEFAULT_ID);
		blogLanguage = blog.getLanguage(blog.getDefaultLanguage());
	}

	return (blogLanguage != null) ? Locale.forLanguageTag(blogLanguage.getLanguage()) : request.getLocale();
}
 

public RequestData(final HttpServletRequest request) {
    method = request.getMethod();
    uri = request.getRequestURI();
    protocol = request.getProtocol();
    servletPath = request.getServletPath();
    pathInfo = request.getPathInfo();
    pathTranslated = request.getPathTranslated();
    characterEncoding = request.getCharacterEncoding();
    queryString = request.getQueryString();
    contentLength = request.getContentLength();
    contentType = request.getContentType();
    serverName = request.getServerName();
    serverPort = request.getServerPort();
    remoteUser = request.getRemoteUser();
    remoteAddress = request.getRemoteAddr();
    remoteHost = request.getRemoteHost();
    remotePort = request.getRemotePort();
    localAddress = request.getLocalAddr();
    localHost = request.getLocalName();
    localPort = request.getLocalPort();
    authorizationScheme = request.getAuthType();
    preferredClientLocale = request.getLocale();
    allClientLocales = Collections.list(request.getLocales());
    contextPath = request.getContextPath();
    userPrincipal = request.getUserPrincipal();
    requestHeaders = getRequestHeaders(request);
    cookies = getCookies(request.getCookies());
    requestAttributes = getRequestAttributes(request);
}
 

private Locale getLocale() {
    final WebContext context = WebContextThreadStack.get();
    if (context == null) {
        return Locale.getDefault();
    }
    final HttpServletRequest request = context.getHttpServletRequest();
    final ValidatorConfig validatorConfig = this.validatorFactory.getValidatorConfig();
    final String locale = request.getParameter(validatorConfig.getLanguageParameterName());
    if (StringUtils.hasText(locale)) {
        try {
            return LocaleUtils.toLocale(locale);
        } catch (IllegalArgumentException e) { }
    }
    return request.getLocale();
}
 

public Locale resolveLocale(final HttpServletRequest request) {

		if (Utils.isNotEmpty(request.getHeader("Accept-Language")))
			return request.getLocale();
		else
			return null;
	}
 

public static Locale getLocale(HttpServletRequest request, HttpSession session, Object appDefaultLocale) {
    // check session first, should override all if anything set there
    Object localeObject = session != null ? session.getAttribute("locale") : null;

    // next see if the userLogin has a value
    if (localeObject == null && session != null) { // SCIPIO: 2018-07-30: added null session check
        Map<?, ?> userLogin = (Map<?, ?>) session.getAttribute("userLogin");
        if (userLogin == null) {
            userLogin = (Map<?,?>) session.getAttribute("autoUserLogin");
        }

        if (userLogin != null) {
            localeObject = userLogin.get("lastLocale");
        }
    }

    // no user locale? before global default try appDefaultLocale if specified
    if (localeObject == null && UtilValidate.isNotEmpty(appDefaultLocale)) {
        localeObject = appDefaultLocale;
    }

    // finally request (w/ a fall back to default)
    if (localeObject == null) {
        localeObject = request != null ? request.getLocale() : null;
    }

    return UtilMisc.ensureLocale(localeObject);
}
 

@Override
protected void service(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {
    boolean isValid = true;
    Locale locale = req.getLocale();
    String strNumber = req.getParameter("number");
    double number = NumberUtils.toDouble(strNumber, Double.NaN);
    try {
        if (Double.isNaN(number) || number <= -1 || 1 <= number) {
            isValid = false;
        }

        StringBuilder bodyHtml = new StringBuilder();
        bodyHtml.append("<form action=\"lotd\" method=\"post\">");
        bodyHtml.append(getMsg("msg.enter.decimal.value", locale));
        bodyHtml.append("<br><br>");
        if (!Double.isNaN(number) && isValid) {
            bodyHtml.append("<input type=\"text\" name=\"number\" size=\"18\" maxlength=\"18\" value=" + strNumber + ">");
        } else {
            bodyHtml.append("<input type=\"text\" name=\"number\" size=\"18\" maxlength=\"18\">");
        }
        bodyHtml.append(" + 1 = ");
        if (!Double.isNaN(number) && isValid) {
            bodyHtml.append(String.valueOf(number + 1));
        }
        bodyHtml.append("<br><br>");
        bodyHtml.append("<input type=\"submit\" value=\"" + getMsg("label.calculate", locale) + "\">");
        bodyHtml.append("<br><br>");
        bodyHtml.append(getInfoMsg("msg.note.lossoftrailingdigits", locale));
        bodyHtml.append("</form>");
        responseToClient(req, res, getMsg("title.lossoftrailingdigits.page", locale), bodyHtml.toString());

    } catch (Exception e) {
        log.error("Exception occurs: ", e);
    }
}
 

@Override
protected void service(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {

    req.setCharacterEncoding("Shift_JIS");
    res.setContentType("text/html; charset=UTF-8");
    try {
        String string = req.getParameter("string");
        Locale locale = req.getLocale();

        StringBuilder bodyHtml = new StringBuilder();

        bodyHtml.append("<form action=\"mojibake\" method=\"post\">");
        bodyHtml.append(getMsg("description.capitalize.string", locale));
        bodyHtml.append("<br><br>");
        bodyHtml.append(getMsg("label.string", locale) + ": ");
        bodyHtml.append("<input type=\"text\" name=\"string\" size=\"100\" maxlength=\"100\">");
        bodyHtml.append("<br><br>");
        bodyHtml.append("<input type=\"submit\" value=\"" + getMsg("label.submit", locale) + "\">");
        bodyHtml.append("<br><br>");

        if (string != null && !"".equals(string)) {
            // Capitalize the given string
            String capitalizeName = WordUtils.capitalize(string);
            bodyHtml.append(getMsg("label.capitalized.string", locale) + " : " + encodeForHTML(capitalizeName));
        } else {
            bodyHtml.append(getMsg("msg.enter.string", locale));
        }
        bodyHtml.append("<br><br>");
        bodyHtml.append(getInfoMsg("msg.note.mojibake", locale));
        bodyHtml.append("</form>");

        responseToClient(req, res, getMsg("title.mojibake.page", locale), bodyHtml.toString());

    } catch (Exception e) {
        log.error("Exception occurs: ", e);
    }
}
 

/**
 * Returns the html code which represents the page content
 *
 * @param data
 *            The structure which contains the informations about the page
 * @param nMode
 *            The mode in which displaying the page : normal or administration
 * @param request
 *            The request
 * @return The html code of a page
 */
private static String buildPageContent( PageData data, int nMode, HttpServletRequest request )
{
    Locale locale = null;
    HashMap<String, Object> model = new HashMap<>( );

    if ( request != null )
    {
        locale = request.getLocale( );
    }

    List<PageInclude> listIncludes = PageIncludeService.getIncludes( );

    for ( PageInclude pic : listIncludes )
    {
        pic.fillTemplate( model, data, nMode, request );
    }

    model.put( Markers.PAGE_NAME, ( data.getName( ) == null ) ? "" : data.getName( ) );
    model.put( Markers.PAGE_TITLE, ( data.getName( ) == null ) ? "" : data.getName( ) );
    model.put( Markers.PAGE_CONTENT, ( data.getContent( ) == null ) ? "" : data.getContent( ) );

    String strBaseUrl = ( request != null ) ? AppPathService.getBaseUrl( request ) : ""; // request could be null (method called by daemons or batch)

    // for link service
    model.put( Markers.BASE_URL, strBaseUrl );

    HtmlTemplate template = AppTemplateService.getTemplate( TEMPLATE_PAGE_SITE_MESSAGE, locale, model );

    template.substitute( BOOKMARK_BASE_URL, ( request != null ) ? AppPathService.getBaseUrl( request ) : "" ); // request could be null (method called by
                                                                                                               // daemons or batch)

    return template.getHtml( );
}
 

@RequestMapping("/details/{goodsId}")
@ResponseBody
public String goodsDetails(Model model, MiaoshaUser user, @PathVariable("goodsId") long id, HttpServletResponse response, HttpServletRequest request) {
    model.addAttribute("user", user);

    String html = redisService.get(GoodsKey.getGoodDetails, "" + id, String.class);
    if (!StringUtils.isEmpty(html)) {
        return html;
    }
    GoodsVo goodsVo = goodsService.getGoodsVoById(id);
    model.addAttribute("goodVo", goodsVo);

    //判断秒杀状态
    Long startDate = goodsVo.getStartDate().getTime();
    Long endData = goodsVo.getEndDate().getTime();
    Long now = System.currentTimeMillis();

    int miaoshaStatus = 0;
    int remainSeconds = 0;
    if (now < startDate) {
        miaoshaStatus = 0;
        remainSeconds = (int) ((startDate - now) / 1000);
    } else if (now > endData) {
        miaoshaStatus = 2;
        remainSeconds = -1;
    } else {
        miaoshaStatus = 1;
        remainSeconds = 0;
    }

    model.addAttribute("miaoshaStatus", miaoshaStatus);
    model.addAttribute("remainSeconds", remainSeconds);

    //加入到缓存中
    WebContext ctx = new WebContext(request, response, request.getServletContext(), request.getLocale(), model.asMap());
    html = thymeleafViewResolver.getTemplateEngine().process("goods_details", ctx);

    if (!StringUtils.isEmpty(html)) {
        redisService.set(GoodsKey.getGoodDetails, "" + id, html);
    }
    return html;
}
 

@Override
public Locale resolveLocale(HttpServletRequest request) {
	Locale locale = resolveLocaleContext(request).getLocale();
	return (locale != null ? locale : request.getLocale());
}
 

/**
 * Build or get in the cache the page which contains the site map depending on the mode
 *
 * @param request
 *            The Http request
 * @param nMode
 *            The selected mode
 * @param plugin
 *            The plugin
 * @return The content of the site map
 */
@Override
public XPage getPage( HttpServletRequest request, int nMode, Plugin plugin )
{
    XPage page = new XPage( );
    String strKey = getKey( nMode, request );

    Locale locale = request.getLocale( );

    SiteMapCacheService siteMapCacheService = SiteMapCacheService.getInstance( );

    // Check the key in the cache
    String strCachedPage = siteMapCacheService.isCacheEnable( ) ? (String) siteMapCacheService.getFromCache( strKey ) : null;

    if ( strCachedPage == null )
    {
        // Build the HTML document
        String strPage = buildPageContent( nMode, request );

        // Add it to the cache
        if ( siteMapCacheService.isCacheEnable( ) )
        {
            synchronized( strKey )
            {
                siteMapCacheService.putInCache( strKey, strPage );
            }
        }

        page.setPathLabel( I18nService.getLocalizedString( PROPERTY_PATH_LABEL, locale ) );
        page.setTitle( I18nService.getLocalizedString( PROPERTY_PAGE_TITLE, locale ) );
        page.setContent( strPage );

        return page;
    }

    // The document exist in the cache
    page.setPathLabel( I18nService.getLocalizedString( PROPERTY_PATH_LABEL, locale ) );
    page.setTitle( I18nService.getLocalizedString( PROPERTY_PAGE_TITLE, locale ) );
    page.setContent( strCachedPage );

    return page;
}
 

private void putUserInfoInSession(HttpServletRequest httpRequest) {
	final HttpSession session = httpRequest.getSession(false);
	if (session == null) {
		// la session n'est pas encore créée (et ne le sera peut-être jamais)
		return;
	}
	// on ne met dans la session ces attributs que si ils n'y sont pas déjà
	// (pour que la session ne soit pas resynchronisée si serveur en cluster par exemple),
	// donc l'adresse ip est celle de la première requête créant une session,
	// et si l'adresse ip change ensuite c'est très étrange
	// mais elle n'est pas mise à jour dans la session
	if (session.getAttribute(SessionListener.SESSION_COUNTRY_KEY) == null) {
		// langue préférée du navigateur, getLocale ne peut être null
		final Locale locale = httpRequest.getLocale();
		if (!locale.getCountry().isEmpty()) {
			session.setAttribute(SessionListener.SESSION_COUNTRY_KEY, locale.getCountry());
		} else {
			session.setAttribute(SessionListener.SESSION_COUNTRY_KEY, locale.getLanguage());
		}
	}
	if (session.getAttribute(SessionListener.SESSION_REMOTE_ADDR) == null) {
		// adresse ip
		final String forwardedFor = httpRequest.getHeader("X-Forwarded-For");
		final String remoteAddr;
		if (forwardedFor == null) {
			remoteAddr = httpRequest.getRemoteAddr();
		} else {
			remoteAddr = httpRequest.getRemoteAddr() + " forwarded for " + forwardedFor;
		}
		session.setAttribute(SessionListener.SESSION_REMOTE_ADDR, remoteAddr);
	}
	if (session.getAttribute(SessionListener.SESSION_REMOTE_USER) == null) {
		// login utilisateur, peut être null
		final String remoteUser = httpRequest.getRemoteUser();
		if (remoteUser != null) {
			session.setAttribute(SessionListener.SESSION_REMOTE_USER, remoteUser);
		}
	}
	if (session.getAttribute(SessionListener.SESSION_USER_AGENT) == null) {
		final String userAgent = httpRequest.getHeader("User-Agent");
		session.setAttribute(SessionListener.SESSION_USER_AGENT, userAgent);
	}
}
 

@Override
protected void service(HttpServletRequest req, HttpServletResponse res) throws ServletException, IOException {

    try {
        String strLength = req.getParameter("length");
        int length = NumberUtils.toInt(strLength, 0);
        String[] characters = req.getParameterValues("characters");
        Locale locale = req.getLocale();

        StringBuilder bodyHtml = new StringBuilder();
        bodyHtml.append("<form action=\"strplusopr\" method=\"post\">");
        bodyHtml.append(getMsg("description.random.string.generator", locale));
        bodyHtml.append("<br><br>");
        bodyHtml.append(getMsg("label.character.count", locale) + ": ");
        bodyHtml.append("<br>");
        if (length > 0) {
            bodyHtml.append("<input type=\"text\" name=\"length\" size=\"6\" maxlength=\"6\" value=\"" + length
                    + "\">");
        } else {
            bodyHtml.append("<input type=\"text\" name=\"length\" size=\"6\" maxlength=\"6\">");
        }
        bodyHtml.append("<br><br>");
        bodyHtml.append("<p>" + getMsg("label.available.characters", locale) + "</p>");

        appendCheckBox(characters, locale, bodyHtml, ALL_NUMBERS, "label.numbers");
        appendCheckBox(characters, locale, bodyHtml, ALL_UPPER_CHARACTERS, "label.uppercase.characters");
        appendCheckBox(characters, locale, bodyHtml, ALL_LOWER_CHARACTERS, "label.lowercase.characters");
        appendCheckBox(characters, locale, bodyHtml, ALL_SIGNS, "label.signs");

        bodyHtml.append("<input type=\"submit\" value=\"" + getMsg("label.submit", locale) + "\">");
        bodyHtml.append("<br><br>");

        if (length > 0) {
            // StringBuilder builder = new StringBuilder();
            String s = "";
            if (characters != null) {
                java.util.Random rand = new java.util.Random();
                log.info("Start Date: {}", new Date());
                for (int i = 0; i < length && i < MAX_LENGTH; i++) {
                    s = s + characters[rand.nextInt(characters.length)];
                    // builder.append(characters[rand.nextInt(characters.length)]);
                }
                log.info("End Date: {}", new Date());
            }
            bodyHtml.append(getMsg("label.execution.result", locale));
            bodyHtml.append("<br><br>");
            // bodyHtml.append(encodeForHTML(builder.toString()));
            bodyHtml.append(encodeForHTML(s));
        } else {
            bodyHtml.append(getMsg("msg.enter.positive.number", locale));
        }
        bodyHtml.append("<br><br>");
        bodyHtml.append(getInfoMsg("msg.note.strplusopr", locale));
        bodyHtml.append("</form>");
        responseToClient(req, res, getMsg("title.strplusopr.page", locale), bodyHtml.toString());

    } catch (Exception e) {
        log.error("Exception occurs: ", e);
    }
}
 

/**
	 * 商品列表展示
	 * 
	 * QPS: 500
	 * 
	 * 模拟：5000个并发 * 10次循环 = 50000个请求
	 * 
	 * 耗时：1分40秒
	 * 
	 * 分析：在并发访问过程中，数据库服务器CPU占用率达到了95%，负载最高到了3(mysql装在单核cpu的虚拟机上，内存1GB)，
	 * 可见，并发访问中，造成QPS低的瓶颈在数据库。
	 * 
	 * 关于负载介绍: https://zhidao.baidu.com/question/186962244.html
	 * 
	 * @param model
	 * @param response
	 * @param miaoshaUserEntity
	 * @return
	 */
	@RequestMapping(value = "to_list", produces = "text/html")	// produces，指定返回thml页面
	@ResponseBody
	public String toList(
			Model model, HttpServletResponse response, HttpServletRequest request
//			@CookieValue(value = MiaoshaUserServiceImpl.COOKIE_NAME_TOKEN, required = false) String cookieToken,
//			@RequestParam(value = MiaoshaUserServiceImpl.COOKIE_NAME_TOKEN, required = false) String paramToken
//			MiaoshaUserEntity miaoshaUserEntity
			) {

//		String token = null;
//
//		if (StringUtils.isEmpty(paramToken)) {
//			if (!StringUtils.isEmpty(cookieToken)) {
//				token = cookieToken;
//			}
//		} else {
//			token = paramToken;
//		}
////		
//		if (StringUtils.isEmpty(token)) {
//			return "/login";
//		}
//
//		MiaoshaUserEntity miaoshaUserEntity = miaoshaUserService.getByToken(token, response);
//
//		if (miaoshaUserEntity == null) {
//			return "/login";
//		}
//
//		model.addAttribute("user", miaoshaUserEntity);
		
		// 添加html页面缓存到redis，也就是redis中缓存已经被渲染好的html静态页面
		// -------------------------------------------------
		
		// 取缓存redis缓存中的thymeleaf渲染好的html页面
		String html = redisService.get(GoodsKey.getGoodsList, "", String.class);
		if (!StringUtils.isEmpty(html)) {
			return html;
		}
		
		List<GoodsVo> list = goodsService.selectGoodsVoList();
		model.addAttribute("goodsList", list);
		
		// 手动渲染thymeleaf模板
		SpringWebContext swc = new SpringWebContext(request, response, request.getServletContext(), 
				request.getLocale(), model.asMap(), applicationContext);	// 将model中数据放到SpringWebContext
		SpringTemplateEngine templateEngine = thymeleafViewResolver.getTemplateEngine();	
		html = templateEngine.process("goods_list", swc);	// thymeleaf模板引擎手动渲染出html页面
//		if (!StringUtils.isEmpty(html)) {
//			redisService.set(GoodsKey.getGoodsList, "", html);	// 将渲染好的html页面放进缓存
//		}
		return html;
		
		// -------------------------------------------------
	}
 

/**
 * Determine the default locale for the given request,
 * Called if no locale cookie has been found.
 * <p>The default implementation returns the specified default locale,
 * if any, else falls back to the request's accept-header locale.
 * @param request the request to resolve the locale for
 * @return the default locale (never {@code null})
 * @see #setDefaultLocale
 * @see javax.servlet.http.HttpServletRequest#getLocale()
 */
protected Locale determineDefaultLocale(HttpServletRequest request) {
	Locale defaultLocale = getDefaultLocale();
	if (defaultLocale == null) {
		defaultLocale = request.getLocale();
	}
	return defaultLocale;
}
 

/**
 * Retrieve the current locale from the given request, using the
 * LocaleResolver bound to the request by the DispatcherServlet
 * (if available), falling back to the request's accept-header Locale.
 * <p>This method serves as a straightforward alternative to the standard
 * Servlet {@link javax.servlet.http.HttpServletRequest#getLocale()} method,
 * falling back to the latter if no more specific locale has been found.
 * <p>Consider using {@link org.springframework.context.i18n.LocaleContextHolder#getLocale()}
 * which will normally be populated with the same Locale.
 * @param request current HTTP request
 * @return the current locale for the given request, either from the
 * LocaleResolver or from the plain request itself
 * @see #getLocaleResolver
 * @see org.springframework.context.i18n.LocaleContextHolder#getLocale()
 */
public static Locale getLocale(HttpServletRequest request) {
	LocaleResolver localeResolver = getLocaleResolver(request);
	return (localeResolver != null ? localeResolver.resolveLocale(request) : request.getLocale());
}
 

/**
 * Retrieve the current locale from the given request, using the
 * LocaleResolver bound to the request by the DispatcherServlet
 * (if available), falling back to the request's accept-header Locale.
 * <p>This method serves as a straightforward alternative to the standard
 * Servlet {@link javax.servlet.http.HttpServletRequest#getLocale()} method,
 * falling back to the latter if no more specific locale has been found.
 * <p>Consider using {@link org.springframework.context.i18n.LocaleContextHolder#getLocale()}
 * which will normally be populated with the same Locale.
 * @param request current HTTP request
 * @return the current locale for the given request, either from the
 * LocaleResolver or from the plain request itself
 * @see #getLocaleResolver
 * @see org.springframework.context.i18n.LocaleContextHolder#getLocale()
 */
public static Locale getLocale(HttpServletRequest request) {
	LocaleResolver localeResolver = getLocaleResolver(request);
	return (localeResolver != null ? localeResolver.resolveLocale(request) : request.getLocale());
}