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Because the mountain was there
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Request modifying with Servlet Filter 1

Request modifying with Servlet Filter 1

一、创建MyMvcConfig 继承WebMvcConfigurationSupport

        
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package com.greattao.egtcp.web.foreign.util; import org.springframework.context.annotation.Configuration; import org.springframework.web.servlet.config.annotation.InterceptorRegistry; import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport; import javax.annotation.Resource; @Configuration public class MyMvcConfig extends WebMvcConfigurationSupport { @Resource private MyInterCeptor myInterCeptor; @Override protected void addInterceptors(InterceptorRegistry registry) { // addPathPatterns("/**") 表示拦截所有的请求, // excludePathPatterns("/login", "/register") 表示除了登陆与注册之外,因为登陆注册不需要登陆也可以访问 //注册自己的拦截器,并设置拦截路径,拦截多个可以全一个list集合 registry.addInterceptor(myInterCeptor).addPathPatterns("/**").excludePathPatterns("/actuator/**","/login", "/index"); } /** * 配置静态访问资源 * @param registry */ @Override public void addResourceHandlers(ResourceHandlerRegistry registry) { registry.addResourceHandler("/static/**").addResourceLocations("classpath:/static/"); } }

二、创建ParameterRequestWrapper 继承HttpServletRequestWrapper

        
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package com.greattao.egtcp.web.foreign.util; import lombok.extern.slf4j.Slf4j; import javax.servlet.http.Cookie; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletRequestWrapper; import java.util.*; @Slf4j public class ParameterRequestWrapper extends HttpServletRequestWrapper { private Map<String, String[]> params = new HashMap<>(); private Map<String, String> mapCookies; /** * Constructs a request object wrapping the given request. * * @param request * @throws IllegalArgumentException if the request is null */ public ParameterRequestWrapper(HttpServletRequest request) { super(request); //将参数表,赋予给当前的Map以便于持有request中的参数 this.params.putAll(request.getParameterMap()); this.mapCookies = new HashMap<>(); } /** * 重载构造方法 */ public ParameterRequestWrapper(HttpServletRequest request, Map<String, Object> extendParams) { this(request); //这里将扩展参数写入参数表 addAllParameters(extendParams); } /** * 在获取所有的参数名,必须重写此方法,否则对象中参数值映射不上 * * @return */ @Override public Enumeration<String> getParameterNames() { return new Vector(params.keySet()).elements(); } /** * 重写getParameter方法 * * @param name 参数名 * @return 返回参数值 */ @Override public String getParameter(String name) { String[] values = params.get(name); if (values == null || values.length == 0) { return null; } return values[0]; } @Override public String[] getParameterValues(String name) { String[] values = params.get(name); if (values == null || values.length == 0) { return null; } return values; } /** * 增加多个参数 * * @param otherParams 增加的多个参数 */ public void addAllParameters(Map<String, Object> otherParams) { for (Map.Entry<String, Object> entry : otherParams.entrySet()) { addParameter(entry.getKey(), entry.getValue()); } } /** * 增加参数 * * @param name 参数名 * @param value 参数值 */ public void addParameter(String name, Object value) { if (value != null) { if (value instanceof String[]) { params.put(name, (String[]) value); } else if (value instanceof String) { params.put(name, new String[]{(String) value}); } else { params.put(name, new String[]{String.valueOf(value)}); } } } /** * 本类 存入 Cookie * @return */ public void putCookie(String name, String value) { this.mapCookies.put(name, value); } /** * 获取request中的cookie * @param key */ public String getCookieForRequest(String key) { Cookie[] cookies = getCookieArrForRequest(); if (cookies == null || cookies.length == 0) { return null; } List<Cookie> cookieList = new ArrayList<>(Arrays.asList(cookies)); for (int i = 0; i < cookieList.size(); i++) { if(cookieList.get(i).getName().equals(key)){ return cookieList.get(i).getValue(); } } return null; } /** * 获取request中的cookie[] */ public Cookie[] getCookieArrForRequest() { HttpServletRequest request = (HttpServletRequest) getRequest(); return request.getCookies(); } /** * 获取本类存放的和request中的Cookie * @return */ public Cookie[] getCookies() { Cookie[] cookies = getCookieArrForRequest(); if (mapCookies == null || mapCookies.isEmpty()) { return cookies; } if (cookies == null || cookies.length == 0) { List<Cookie> cookieList = new LinkedList<>(); for (Map.Entry<String, String> entry : mapCookies.entrySet()) { String key = entry.getKey(); if (key != null && !"".equals(key)) { cookieList.add(new Cookie(key, entry.getValue())); } } if (cookieList.isEmpty()) { return cookies; } return cookieList.toArray(new Cookie[cookieList.size()]); } else { List<Cookie> cookieList = new ArrayList<>(Arrays.asList(cookies)); for (Map.Entry<String, String> entry : mapCookies.entrySet()) { String key = entry.getKey(); if (key != null && !"".equals(key)) { for (int i = 0; i < cookieList.size(); i++) { if(cookieList.get(i).getName().equals(key)){ cookieList.remove(i); } } cookieList.add(new Cookie(key, entry.getValue())); } } return cookieList.toArray(new Cookie[cookieList.size()]); } } }

三、创建MyInterCeptor实现HandlerInterceptor

        
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package com.greattao.egtcp.web.foreign.util; import com.cy.framework.util.storage.DataStorage; import lombok.extern.slf4j.Slf4j; import org.apache.commons.lang.StringUtils; import org.springframework.stereotype.Component; import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; @Slf4j @Component public class MyInterCeptor implements HandlerInterceptor { /** * 过滤路径 */ // static final String AUTH_PATH = "/static/"; private DataStorage dataStorage = DataStorage.getInstance(); @Override public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception { // String authToken = "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.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.WuB_z-OVuj28ITsodT9hqL4DoXTCYHkR61lUptcdkQE"; ParameterRequestWrapper wrapper = new ParameterRequestWrapper(request); //TODO 上线注释放开 String authToken=wrapper.getCookieForRequest(CommonParamt.TKOEN_NAME); if(StringUtils.isNotEmpty(authToken)){ wrapper.addParameter(CommonParamt.TKOEN_NAME, "Bearer " + authToken); this.dataStorage.put("REQUEST_ATTRIBUTES", wrapper); return true; } return true; } @Override public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception { } @Override public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception { } }