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qinglong 4fce311dce Site updated: 2024-05-22 15:54:17
2024-05-22 15:54:20 +08:00

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class="ic i-angle-right"></i> <span itemprop="itemListElement" itemscope itemtype="https://schema.org/ListItem"><a href="/categories/%E5%B7%A5%E4%BD%9C/" itemprop="item" rel="index" title="分类于 工作"><span itemprop="name">工作</span></a><meta itemprop="position" content="1"></span><i class="ic i-angle-right"></i> <span class="current" itemprop="itemListElement" itemscope itemtype="https://schema.org/ListItem"><a href="/categories/%E5%B7%A5%E4%BD%9C/%E8%A7%A3%E5%86%B3%E9%97%AE%E9%A2%98/" itemprop="item" rel="index" title="分类于 解决问题"><span itemprop="name">解决问题</span></a><meta itemprop="position" content="2"></span></div><article itemscope itemtype="http://schema.org/Article" class="post block" lang="zh-CN"><link itemprop="mainEntityOfPage" href="https://hitoli.com/2024/04/30/Java%E5%90%8E%E7%AB%AF%E7%A6%81%E6%AD%A2%E6%8E%A5%E5%8F%A3%E7%9E%AC%E6%97%B6%E9%87%8D%E5%A4%8D%E8%B0%83%E7%94%A8/"><span hidden itemprop="author" itemscope itemtype="http://schema.org/Person"><meta itemprop="image" content="/images/avatar.jpg"><meta itemprop="name" content="Hito Li"><meta itemprop="description" content="天下事有难易乎？为之，则难者亦易矣, 天生我材必有用"></span><span hidden itemprop="publisher" itemscope itemtype="http://schema.org/Organization"><meta itemprop="name" content="涛声依旧"></span><div class="body md" itemprop="articleBody"><h6 id="简介"><a class="anchor" href="#简介">#</a> 简介</h6><p>由于前端会莫名其妙的对同一接口请求多次，从而占用后端资源造成浪费。所以采用了后端拦截相关重复请求的方案。此方案会将请求用户 id 加接口 url 加参数作为 key，请求时间作为 value，使用 ConcurrentHashMap 进行缓存。如果下次相同的请求和上次请求的时间在指定的范围内则认为此请求属于重复请求。</p><h6 id="自定义可重复读request"><a class="anchor" href="#自定义可重复读request">#</a> 自定义可重复读 Request</h6><p>request 的 body 只能读取一次，所以对其进行封装。<br></p><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br><span class="line">84</span><br><span class="line">85</span><br><span class="line">86</span><br><span class="line">87</span><br><span class="line">88</span><br><span class="line">89</span><br><span class="line">90</span><br><span class="line">91</span><br><span class="line">92</span><br><span class="line">93</span><br><span class="line">94</span><br><span class="line">95</span><br><span class="line">96</span><br><span class="line">97</span><br><span class="line">98</span><br><span class="line">99</span><br><span class="line">100</span><br><span class="line">101</span><br><span class="line">102</span><br><span class="line">103</span><br><span class="line">104</span><br><span class="line">105</span><br><span class="line">106</span><br><span class="line">107</span><br><span class="line">108</span><br><span class="line">109</span><br><span class="line">110</span><br><span class="line">111</span><br><span class="line">112</span><br><span class="line">113</span><br><span class="line">114</span><br><span class="line">115</span><br><span class="line">116</span><br><span class="line">117</span><br><span class="line">118</span><br><span class="line">119</span><br><span class="line">120</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> xxx.support;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> com.alibaba.fastjson.JSON;</span><br><span class="line"><span class="keyword">import</span> lombok.extern.slf4j.Slf4j;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> javax.servlet.ReadListener;</span><br><span class="line"><span class="keyword">import</span> javax.servlet.ServletInputStream;</span><br><span class="line"><span class="keyword">import</span> javax.servlet.http.HttpServletRequest;</span><br><span class="line"><span class="keyword">import</span> javax.servlet.http.HttpServletRequestWrapper;</span><br><span class="line"><span class="keyword">import</span> java.io.*;</span><br><span class="line"><span class="keyword">import</span> java.nio.charset.StandardCharsets;</span><br><span class="line"><span class="keyword">import</span> java.util.Enumeration;</span><br><span class="line"><span class="keyword">import</span> java.util.Map;</span><br><span class="line"><span class="keyword">import</span> java.util.Objects;</span><br><span class="line"><span class="keyword">import</span> java.util.TreeMap;</span><br><span class="line"></span><br><span class="line"><span class="meta">@Slf4j</span></span><br><span class="line"><span class="keyword">public</span> <span class="keyword">class</span> <span class="title class_">RepeatableReadHttpServletRequestWrapper</span> <span class="keyword">extends</span> <span class="title class_">HttpServletRequestWrapper</span> &#123;</span><br><span class="line"></span><br><span class="line"> <span class="keyword">private</span> <span class="keyword">final</span> <span class="type">byte</span>[] requestBody;</span><br><span class="line"></span><br><span class="line"> <span class="keyword">public</span> <span class="title function_">RepeatableReadHttpServletRequestWrapper</span><span class="params">(HttpServletRequest request)</span> <span class="keyword">throws</span> IOException &#123;</span><br><span class="line"> <span class="built_in">super</span>(request);</span><br><span class="line"> <span class="built_in">this</span>.requestBody = readRequestBody(request);</span><br><span class="line"> &#125;</span><br><span class="line"></span><br><span class="line"> <span class="keyword">private</span> <span class="type">byte</span>[] readRequestBody(HttpServletRequest request) <span class="keyword">throws</span> IOException &#123;</span><br><span class="line"> <span class="keyword">try</span> (<span class="type">InputStream</span> <span class="variable">inputStream</span> <span class="operator">=</span> request.getInputStream();</span><br><span class="line"> <span class="type">ByteArrayOutputStream</span> <span class="variable">result</span> <span class="operator">=</span> <span class="keyword">new</span> <span class="title class_">ByteArrayOutputStream</span>()) &#123;</span><br><span class="line"></span><br><span class="line"> <span class="type">byte</span>[] buffer = <span class="keyword">new</span> <span class="title class_">byte</span>[<span class="number">1024</span>];</span><br><span class="line"> <span class="type">int</span> length;</span><br><span class="line"> <span class="keyword">while</span> ((length = inputStream.read(buffer)) != -<span class="number">1</span>) &#123;</span><br><span class="line"> result.write(buffer, <span class="number">0</span>, length);</span><br><span class="line"> &#125;</span><br><span class="line"></span><br><span class="line"> <span class="keyword">return</span> result.toByteArray();</span><br><span class="line"> &#125;</span><br><span class="line"> &#125;</span><br><span class="line"></span><br><span class="line"> <span class="meta">@Override</span></span><br><span class="line"> <span class="keyword">public</span> ServletInputStream <span class="title function_">getInputStream</span><span class="params">()</span> <span class="keyword">throws</span> IOException &#123;</span><br><span class="line"> <span class="comment">// 直接使用 ByteArrayInputStream，它提供可重复读取的输入流</span></span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">new</span> <span class="title class_">ServletInputStream</span>() &#123;</span><br><span class="line"> <span class="keyword">private</span> <span class="keyword">final</span> <span class="type">ByteArrayInputStream</span> <span class="variable">byteArrayInputStream</span> <span class="operator">=</span> <span class="keyword">new</span> <span class="title class_">ByteArrayInputStream</span>(requestBody);</span><br><span class="line"></span><br><span class="line"> <span class="meta">@Override</span></span><br><span class="line"> <span class="keyword">public</span> <span class="type">int</span> <span class="title function_">read</span><span class="params">()</span> <span class="keyword">throws</span> IOException &#123;</span><br><span class="line"> <span class="keyword">return</span> byteArrayInputStream.read();</span><br><span class="line"> &#125;</span><br><span class="line"></span><br><span class="line"> <span class="meta">@Override</span></span><br><span class="line"> <span class="keyword">public</span> <span class="type">boolean</span> <span class="title function_">isFinished</span><span class="params">()</span> &#123;</span><br><span class="line"> <span class="keyword">return</span> byteArrayInputStream.available() == <span class="number">0</span>;</span><br><span class="line"> &#125;</span><br><span class="line"></span><br><span class="line"> <span class="meta">@Override</span></span><br><span class="line"> <span class="keyword">public</span> <span class="type">boolean</span> <span class="title function_">isReady</span><span class="params">()</span> &#123;</span><br><span class="line"> <span class="keyword">return</span> <span class="literal">true</span>;</span><br><span class="line"> &#125;</span><br><span class="line"></span><br><span class="line"> <span class="meta">@Override</span></span><br><span class="line"> <span class="keyword">public</span> <span class="keyword">void</span> <span class="title function_">setReadListener</span><span class="params">(ReadListener readListener)</span> &#123;</span><br><span class="line"> <span class="comment">// 不需要实现，可以留空</span></span><br><span class="line"> &#125;</span><br><span class="line"> &#125;;</span><br><span class="line"> &#125;</span><br><span class="line"></span><br><span class="line"> <span class="meta">@Override</span></span><br><span class="line"> <span class="keyword">public</span> BufferedReader <span class="title function_">getReader</span><span class="params">()</span> <span class="keyword">throws</span> IOException &#123;</span><br><span class="line"> <span class="comment">// 使用 InputStreamReader 包装 ByteArrayInputStream，提供可重复读取的字符流</span></span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">new</span> <span class="title class_">BufferedReader</span>(<span class="keyword">new</span> <span class="title class_">InputStreamReader</span>(<span class="keyword">new</span> <span class="title class_">ByteArrayInputStream</span>(requestBody)));</span><br><span class="line"> &#125;</span><br><span class="line"></span><br><span class="line"> <span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 获取json格式的参数</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@return</span></span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="keyword">public</span> String <span class="title function_">getParamsToJSONString</span><span class="params">()</span> &#123;</span><br><span class="line"> <span class="type">String</span> <span class="variable">jsonStr</span> <span class="operator">=</span> <span class="string">&quot;&quot;</span>;</span><br><span class="line"> <span class="keyword">if</span> (<span class="string">&quot;POST&quot;</span>.equals(<span class="built_in">this</span>.getMethod().toUpperCase()) &amp;&amp; <span class="built_in">this</span>.isJsonRequest()) &#123;</span><br><span class="line"> <span class="keyword">try</span> &#123;</span><br><span class="line"> jsonStr = <span class="built_in">this</span>.readJsonData();</span><br><span class="line"> &#125; <span class="keyword">catch</span> (Exception e) &#123;</span><br><span class="line"> log.error(e.getMessage());</span><br><span class="line"> &#125;</span><br><span class="line"> &#125; <span class="keyword">else</span> &#123;</span><br><span class="line"> Enumeration&lt;String&gt; parameterNames = <span class="built_in">this</span>.getParameterNames();</span><br><span class="line"> <span class="keyword">if</span> (Objects.nonNull(parameterNames) &amp;&amp; parameterNames.hasMoreElements()) &#123;</span><br><span class="line"> <span class="comment">// 将参数排序后转为json</span></span><br><span class="line"> Map&lt;String, String&gt; paramsMap = <span class="keyword">new</span> <span class="title class_">TreeMap</span>&lt;&gt;();</span><br><span class="line"> <span class="keyword">while</span> (parameterNames.hasMoreElements()) &#123;</span><br><span class="line"> <span class="type">String</span> <span class="variable">paramName</span> <span class="operator">=</span> parameterNames.nextElement();</span><br><span class="line"> paramsMap.put(paramName, <span class="built_in">this</span>.getParameter(paramName));</span><br><span class="line"> &#125;</span><br><span class="line"> jsonStr = JSON.toJSONString(paramsMap);</span><br><span class="line"> &#125;</span><br><span class="line"> &#125;</span><br><span class="line"> <span class="keyword">return</span> jsonStr;</span><br><span class="line"> &#125;</span><br><span class="line"></span><br><span class="line"> <span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 判断是否json请求</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@return</span></span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="keyword">private</span> <span class="type">boolean</span> <span class="title function_">isJsonRequest</span><span class="params">()</span> &#123;</span><br><span class="line"> <span class="type">String</span> <span class="variable">contentType</span> <span class="operator">=</span> <span class="built_in">this</span>.getContentType();</span><br><span class="line"> <span class="keyword">return</span> contentType != <span class="literal">null</span> &amp;&amp; contentType.toLowerCase().contains(<span class="string">&quot;application/json&quot;</span>);</span><br><span class="line"> &#125;</span><br><span class="line"></span><br><span class="line"> <span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 获取json格式的参数</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@return</span></span></span><br><span class="line"><span class="comment"> * <span class="doctag">@throws</span> IOException</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="keyword">private</span> String <span class="title function_">readJsonData</span><span class="params">()</span> <span class="keyword">throws</span> IOException &#123;</span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">new</span> <span class="title class_">String</span>(<span class="built_in">this</span>.readRequestBody(<span class="built_in">this</span>), StandardCharsets.UTF_8);</span><br><span class="line"> &#125;</span><br><span class="line"></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure><p></p><h6 id="重复请求过滤器"><a class="anchor" href="#重复请求过滤器">#</a> 重复请求过滤器</h6><p></p><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br><span class="line">84</span><br><span class="line">85</span><br><span class="line">86</span><br><span class="line">87</span><br><span class="line">88</span><br><span class="line">89</span><br><span class="line">90</span><br><span class="line">91</span><br><span class="line">92</span><br><span class="line">93</span><br><span class="line">94</span><br><span class="line">95</span><br><span class="line">96</span><br><span class="line">97</span><br><span class="line">98</span><br><span class="line">99</span><br><span class="line">100</span><br><span class="line">101</span><br><span class="line">102</span><br><span class="line">103</span><br><span class="line">104</span><br><span class="line">105</span><br><span class="line">106</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> xxx.filter;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> cn.hutool.core.collection.CollectionUtil;</span><br><span class="line"><span class="keyword">import</span> xxx.RepeatableReadHttpServletRequestWrapper;</span><br><span class="line"><span class="keyword">import</span> org.springframework.boot.actuate.endpoint.web.WebEndpointResponse;</span><br><span class="line"><span class="keyword">import</span> org.springframework.security.web.util.matcher.RequestMatcher;</span><br><span class="line"><span class="keyword">import</span> org.springframework.web.filter.OncePerRequestFilter;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> javax.servlet.FilterChain;</span><br><span class="line"><span class="keyword">import</span> javax.servlet.ServletException;</span><br><span class="line"><span class="keyword">import</span> javax.servlet.http.HttpServletRequest;</span><br><span class="line"><span class="keyword">import</span> javax.servlet.http.HttpServletResponse;</span><br><span class="line"><span class="keyword">import</span> java.io.IOException;</span><br><span class="line"><span class="keyword">import</span> java.util.List;</span><br><span class="line"><span class="keyword">import</span> java.util.Map;</span><br><span class="line"><span class="keyword">import</span> java.util.Objects;</span><br><span class="line"><span class="keyword">import</span> java.util.concurrent.ConcurrentHashMap;</span><br><span class="line"></span><br><span class="line"><span class="keyword">public</span> <span class="keyword">class</span> <span class="title class_">DuplicateRequestFilter</span> <span class="keyword">extends</span> <span class="title class_">OncePerRequestFilter</span> &#123;</span><br><span class="line">    <span class="comment">// 是否启用</span></span><br><span class="line">    <span class="keyword">private</span> Boolean duplicateRequestFilter;</span><br><span class="line">    <span class="comment">// 间隔时间（毫秒）</span></span><br><span class="line">    <span class="keyword">private</span> Long intervalTime;</span><br><span class="line">    <span class="comment">// 清除缓存时间（毫秒）</span></span><br><span class="line"> <span class="keyword">private</span> Long clearCachetime;</span><br><span class="line">    <span class="comment">// 放行url</span></span><br><span class="line">    <span class="keyword">private</span> List&lt;RequestMatcher&gt; permitAll;</span><br><span class="line"></span><br><span class="line"> <span class="keyword">public</span> <span class="title function_">DuplicateRequestFilter</span><span class="params">(Boolean duplicateRequestFilter, List&lt;RequestMatcher&gt; permitAll, Long intervalTime,</span></span><br><span class="line"><span class="params"> Long clearCachetime)</span> &#123;</span><br><span class="line"> <span class="built_in">this</span>.duplicateRequestFilter = duplicateRequestFilter;</span><br><span class="line"> <span class="built_in">this</span>.permitAll = permitAll;</span><br><span class="line"> <span class="built_in">this</span>.intervalTime = intervalTime;</span><br><span class="line"> <span class="built_in">this</span>.clearCachetime = clearCachetime;</span><br><span class="line"> &#125;</span><br><span class="line"></span><br><span class="line"> <span class="comment">// 存储参数和请求时间</span></span><br><span class="line"> <span class="keyword">private</span> Map&lt;String, Long&gt; requestCache = <span class="keyword">new</span> <span class="title class_">ConcurrentHashMap</span>&lt;&gt;();</span><br><span class="line"></span><br><span class="line"> <span class="meta">@Override</span></span><br><span class="line"> <span class="keyword">protected</span> <span class="keyword">void</span> <span class="title function_">doFilterInternal</span><span class="params">(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain)</span></span><br><span class="line"> <span class="keyword">throws</span> ServletException, IOException &#123;</span><br><span class="line"> <span class="type">boolean</span> <span class="variable">doFilter</span> <span class="operator">=</span> <span class="literal">true</span>;</span><br><span class="line"> <span class="comment">// 使用 ContentCachingRequestWrapper 包装原始请求</span></span><br><span class="line"> <span class="type">RepeatableReadHttpServletRequestWrapper</span> <span class="variable">wrappedRequest</span> <span class="operator">=</span> <span class="literal">null</span>;</span><br><span class="line"> <span class="keyword">if</span> (<span class="built_in">this</span>.duplicateRequestFilter) &#123;</span><br><span class="line"> <span class="comment">// 判断请求路径是否需要放行</span></span><br><span class="line"> <span class="type">boolean</span> <span class="variable">permit</span> <span class="operator">=</span> <span class="literal">false</span>;</span><br><span class="line"> <span class="keyword">if</span> (CollectionUtil.isNotEmpty(<span class="built_in">this</span>.permitAll)) &#123;</span><br><span class="line"> <span class="keyword">for</span> (RequestMatcher matcher: <span class="built_in">this</span>.permitAll) &#123;</span><br><span class="line"> <span class="keyword">if</span> (matcher.matches(request)) &#123;</span><br><span class="line"> permit = <span class="literal">true</span>;</span><br><span class="line"> <span class="keyword">break</span>;</span><br><span class="line"> &#125;</span><br><span class="line"> &#125;</span><br><span class="line"> &#125;</span><br><span class="line"> <span class="keyword">if</span> (!permit) &#123;</span><br><span class="line"> <span class="keyword">if</span> (request <span class="keyword">instanceof</span> RepeatableReadHttpServletRequestWrapper) &#123;</span><br><span class="line"> wrappedRequest = (RepeatableReadHttpServletRequestWrapper) request;</span><br><span class="line"> &#125; <span class="keyword">else</span> &#123;</span><br><span class="line"> wrappedRequest = <span class="keyword">new</span> <span class="title class_">RepeatableReadHttpServletRequestWrapper</span>(request);</span><br><span class="line"> &#125;</span><br><span class="line"> doFilter = <span class="built_in">this</span>.isValid(wrappedRequest);</span><br><span class="line"> &#125;</span><br><span class="line"> &#125;</span><br><span class="line"> <span class="keyword">if</span> (doFilter) &#123;</span><br><span class="line"> <span class="comment">// 继续处理请求</span></span><br><span class="line"> filterChain.doFilter(Objects.nonNull(wrappedRequest) ? wrappedRequest : request, response);</span><br><span class="line"> &#125; <span class="keyword">else</span> &#123;</span><br><span class="line"> response.setContentType(<span class="string">&quot;application/json&quot;</span>);</span><br><span class="line"> response.setStatus(WebEndpointResponse.STATUS_TOO_MANY_REQUESTS);</span><br><span class="line"><span class="comment">// response.setStatus(HttpServletResponse.SC_OK);</span></span><br><span class="line"><span class="comment">// ObjectMapper mapper = new ObjectMapper();</span></span><br><span class="line"><span class="comment">// mapper.writeValue(response.getOutputStream(), R.error(WebEndpointResponse.STATUS_TOO_MANY_REQUESTS, &quot;重复的请求&quot;));</span></span><br><span class="line"> &#125;</span><br><span class="line"> &#125;</span><br><span class="line"></span><br><span class="line"> <span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 验证请求的有效性（判断是否重复请求）</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@param</span> request</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@return</span></span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="keyword">private</span> <span class="type">boolean</span> <span class="title function_">isValid</span><span class="params">(RepeatableReadHttpServletRequestWrapper request)</span> &#123;</span><br><span class="line"> <span class="type">boolean</span> <span class="variable">valid</span> <span class="operator">=</span> <span class="literal">true</span>;</span><br><span class="line"> <span class="comment">// 缓存的key</span></span><br><span class="line"> <span class="type">String</span> <span class="variable">key</span> <span class="operator">=</span> TokenUtil.getUidByToken() + <span class="string">&quot;_&quot;</span> + request.getServletPath() + <span class="string">&quot;_&quot;</span> + request.getParamsToJSONString();</span><br><span class="line"> <span class="comment">// 获取之前的请求时间</span></span><br><span class="line"> <span class="type">Long</span> <span class="variable">previousRequestTime</span> <span class="operator">=</span> requestCache.get(key);</span><br><span class="line"> <span class="keyword">if</span> (previousRequestTime != <span class="literal">null</span>) &#123;</span><br><span class="line"> <span class="comment">// 如果距离上次请求时间很短（例如1秒），则拒绝当前请求</span></span><br><span class="line"> <span class="keyword">if</span> (System.currentTimeMillis() - previousRequestTime &lt; <span class="built_in">this</span>.intervalTime) &#123;</span><br><span class="line"> valid = <span class="literal">false</span>;</span><br><span class="line"> &#125;</span><br><span class="line"> &#125;</span><br><span class="line"> <span class="built_in">this</span>.clearOldRequests();</span><br><span class="line"> <span class="comment">// 缓存当前请求时间</span></span><br><span class="line"> requestCache.put(key, System.currentTimeMillis());</span><br><span class="line"> <span class="keyword">return</span> valid;</span><br><span class="line"> &#125;</span><br><span class="line"></span><br><span class="line"> <span class="comment">// 用于清除缓存中的旧请求数据，防止缓存无限增长</span></span><br><span class="line"> <span class="keyword">private</span> <span class="keyword">void</span> <span class="title function_">clearOldRequests</span><span class="params">()</span> &#123;</span><br><span class="line"> requestCache.entrySet().removeIf(entry -&gt; System.currentTimeMillis() - entry.getValue() &gt; <span class="built_in">this</span>.clearCachetime);</span><br><span class="line"> &#125;</span><br><span class="line"></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure><p></p><h6 id="配置oauth2资源"><a class="anchor" href="#配置oauth2资源">#</a> 配置 OAuth2 资源</h6><p></p><figure class="highlight java"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br><span class="line">64</span><br><span class="line">65</span><br><span class="line">66</span><br><span class="line">67</span><br><span class="line">68</span><br><span class="line">69</span><br><span class="line">70</span><br><span class="line">71</span><br><span class="line">72</span><br><span class="line">73</span><br><span class="line">74</span><br><span class="line">75</span><br><span class="line">76</span><br><span class="line">77</span><br><span class="line">78</span><br><span class="line">79</span><br><span class="line">80</span><br><span class="line">81</span><br><span class="line">82</span><br><span class="line">83</span><br><span class="line">84</span><br><span class="line">85</span><br><span class="line">86</span><br><span class="line">87</span><br><span class="line">88</span><br><span class="line">89</span><br><span class="line">90</span><br><span class="line">91</span><br><span class="line">92</span><br><span class="line">93</span><br><span class="line">94</span><br><span class="line">95</span><br><span class="line">96</span><br><span class="line">97</span><br><span class="line">98</span><br><span class="line">99</span><br><span class="line">100</span><br><span class="line">101</span><br><span class="line">102</span><br><span class="line">103</span><br></pre></td><td class="code"><pre><span class="line"><span class="keyword">package</span> xxx.config;</span><br><span class="line"></span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> xxx.AuthExceptionEntryPoint;</span><br><span class="line"><span class="keyword">import</span> xxx.CustomAccessDeniedHandler;</span><br><span class="line"><span class="keyword">import</span> xxx.DuplicateRequestFilter;</span><br><span class="line"><span class="keyword">import</span> org.slf4j.Logger;</span><br><span class="line"><span class="keyword">import</span> org.slf4j.LoggerFactory;</span><br><span class="line"><span class="keyword">import</span> org.springframework.beans.factory.annotation.Autowired;</span><br><span class="line"><span class="keyword">import</span> org.springframework.beans.factory.annotation.Qualifier;</span><br><span class="line"><span class="keyword">import</span> org.springframework.beans.factory.annotation.Value;</span><br><span class="line"><span class="keyword">import</span> org.springframework.context.annotation.Bean;</span><br><span class="line"><span class="keyword">import</span> org.springframework.context.annotation.Configuration;</span><br><span class="line"><span class="keyword">import</span> org.springframework.security.config.annotation.web.builders.HttpSecurity;</span><br><span class="line"><span class="keyword">import</span> org.springframework.security.oauth2.config.annotation.web.configuration.EnableResourceServer;</span><br><span class="line"><span class="keyword">import</span> org.springframework.security.oauth2.config.annotation.web.configuration.ResourceServerConfigurerAdapter;</span><br><span class="line"><span class="keyword">import</span> org.springframework.security.oauth2.config.annotation.web.configurers.ResourceServerSecurityConfigurer;</span><br><span class="line"><span class="keyword">import</span> org.springframework.security.oauth2.provider.token.TokenStore;</span><br><span class="line"><span class="keyword">import</span> org.springframework.security.web.authentication.preauth.AbstractPreAuthenticatedProcessingFilter;</span><br><span class="line"><span class="keyword">import</span> org.springframework.security.web.util.matcher.AntPathRequestMatcher;</span><br><span class="line"></span><br><span class="line"><span class="keyword">import</span> javax.servlet.Filter;</span><br><span class="line"><span class="keyword">import</span> java.util.Arrays;</span><br><span class="line"><span class="keyword">import</span> java.util.stream.Collectors;</span><br><span class="line"></span><br><span class="line"><span class="meta">@Configuration</span></span><br><span class="line"><span class="meta">@EnableResourceServer</span></span><br><span class="line"><span class="keyword">public</span> <span class="keyword">class</span> <span class="title class_">ResourceServerConfig</span> <span class="keyword">extends</span> <span class="title class_">ResourceServerConfigurerAdapter</span> &#123;</span><br><span class="line"></span><br><span class="line"> <span class="type">Logger</span> <span class="variable">log</span> <span class="operator">=</span> LoggerFactory.getLogger(ResourceServerConfig.class);</span><br><span class="line"></span><br><span class="line"> <span class="meta">@Autowired</span></span><br><span class="line"> <span class="keyword">private</span> TokenStore tokenStore;</span><br><span class="line"> </span><br><span class="line"> <span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 是否开放所有接口</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="meta">@Value(&quot;$&#123;http.security.permitAll:false&#125;&quot;)</span></span><br><span class="line"> <span class="keyword">private</span> Boolean isPermitAll;</span><br><span class="line"></span><br><span class="line"> <span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 是否启用重复请求过滤</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="meta">@Value(&quot;$&#123;request.duplicateFilter.enabled:true&#125;&quot;)</span></span><br><span class="line"> <span class="keyword">private</span> Boolean duplicateRequestFilter;</span><br><span class="line"></span><br><span class="line"> <span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 间隔时间(毫秒)</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="meta">@Value(&quot;$&#123;request.duplicateFilter.interval_time:1000&#125;&quot;)</span></span><br><span class="line"> <span class="keyword">private</span> Long intervalTime;</span><br><span class="line"></span><br><span class="line"> <span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 清除缓存时间(毫秒)</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="meta">@Value(&quot;$&#123;request.duplicateFilter.clear_cache_time:30000&#125;&quot;)</span></span><br><span class="line"> <span class="keyword">private</span> Long clearCachetime;</span><br><span class="line"></span><br><span class="line"> <span class="comment">/**</span></span><br><span class="line"><span class="comment"> * 不需要验证权限的接口</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="keyword">private</span> String[] permitAll = <span class="keyword">new</span> <span class="title class_">String</span>[] &#123;</span><br><span class="line"> <span class="string">&quot;/auth/getVCode&quot;</span>, <span class="string">&quot;/auth/login&quot;</span></span><br><span class="line"> &#125;;</span><br><span class="line"></span><br><span class="line"></span><br><span class="line"> <span class="comment">/**</span></span><br><span class="line"><span class="comment">     * 通行规则</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@param</span> http</span></span><br><span class="line"><span class="comment"> * <span class="doctag">@throws</span> Exception</span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"> <span class="meta">@Override</span></span><br><span class="line"> <span class="keyword">public</span> <span class="keyword">void</span> <span class="title function_">configure</span><span class="params">(HttpSecurity http)</span> <span class="keyword">throws</span> Exception &#123;</span><br><span class="line"> <span class="type">HttpSecurity</span> <span class="variable">httpSecurity</span> <span class="operator">=</span> http.csrf().disable();</span><br><span class="line"> <span class="keyword">if</span> (isPermitAll) &#123;</span><br><span class="line"> httpSecurity.authorizeRequests().antMatchers(<span class="string">&quot;/**&quot;</span>).permitAll();</span><br><span class="line"> &#125; <span class="keyword">else</span> &#123;</span><br><span class="line"> httpSecurity.authorizeRequests()</span><br><span class="line"> .antMatchers(permitAll).permitAll()</span><br><span class="line"> .antMatchers(<span class="string">&quot;/**&quot;</span>).authenticated();</span><br><span class="line"> &#125;</span><br><span class="line"> <span class="keyword">if</span> (<span class="built_in">this</span>.duplicateRequestFilter) &#123;</span><br><span class="line"> httpSecurity.addFilterAfter(duplicateRequestFilter(), AbstractPreAuthenticatedProcessingFilter.class);</span><br><span class="line"> &#125;</span><br><span class="line"> <span class="comment">//让X-frame-options失效,去除iframe限制</span></span><br><span class="line"> http.headers().frameOptions().disable();</span><br><span class="line"> &#125;</span><br><span class="line"></span><br><span class="line"> <span class="meta">@Override</span></span><br><span class="line"> <span class="keyword">public</span> <span class="keyword">void</span> <span class="title function_">configure</span><span class="params">(ResourceServerSecurityConfigurer resources)</span> <span class="keyword">throws</span> Exception &#123;</span><br><span class="line"> resources.tokenStore(tokenStore).authenticationEntryPoint(<span class="keyword">new</span> <span class="title class_">AuthExceptionEntryPoint</span>())</span><br><span class="line"> .accessDeniedHandler(<span class="keyword">new</span> <span class="title class_">CustomAccessDeniedHandler</span>());</span><br><span class="line"></span><br><span class="line"> &#125;</span><br><span class="line"></span><br><span class="line"> <span class="meta">@Bean</span></span><br><span class="line"> <span class="keyword">public</span> Filter <span class="title function_">duplicateRequestFilter</span><span class="params">()</span> &#123;</span><br><span class="line"> <span class="keyword">return</span> <span class="keyword">new</span> <span class="title class_">DuplicateRequestFilter</span>(<span class="built_in">this</span>.duplicateRequestFilter, Arrays.asList(<span class="built_in">this</span>.permitAll)</span><br><span class="line"> .stream().map(AntPathRequestMatcher::<span class="keyword">new</span>).collect(Collectors.toList()), <span class="built_in">this</span>.intervalTime,</span><br><span class="line"> <span class="built_in">this</span>.clearCachetime);</span><br><span class="line"> &#125;</span><br><span class="line"></span><br><span class="line">&#125;</span><br></pre></td></tr></table></figure><p></p><div class="tags"><a href="/tags/java/" rel="tag"><i class="ic i-tag"></i> java</a> <a href="/tags/429/" 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