IIS配置允许跨域后，还是无法跨域，请检查＜handlers＞

发布：2021/9/26 16:13:37作者：管理员来源：本站浏览次数：970

IIS配置允许跨域后，还是无法跨域，提示 index.html:1 Access to XMLHttpRequest at ' XXXX' from origin 'http://127.0.0.1:8080' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource.请检查

<system.webServer>
    <httpProtocol>
      
      <customHeaders>
        <add name="Access-Control-Allow-Origin" value="*" />
        
        <add name="Access-Control-Allow-Headers" value="AuthToken, Authorization, Origin, Content-Type, Accept, X-Requested-With" />
        
        <add name="Access-Control-Request-Methods" value="GET, POST, PUT, DELETE, OPTIONS" />
        
      </customHeaders>
      
    </httpProtocol>

    <handlers>
      <remove name="ExtensionlessUrlHandler-Integrated-4.0"/>
      <remove name="OPTIONSVerbHandler"/>
      <remove name="TRACEVerbHandler"/>
      <add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="*" type="System.Web.Handlers.TransferRequestHandler"
        preCondition="integratedMode,runtimeVersionv4.0"/>
    </handlers>

</system.webServer>

关键问题是这两行代码

    <remove name="OPTIONSVerbHandler"/> 
    <remove name="TRACEVerbHandler"/> 

方式一：直接去掉这两行代码

      <system.webServer>
        <httpProtocol>
          
          <customHeaders>
            <add name="Access-Control-Allow-Origin" value="*" />
            
            <add name="Access-Control-Allow-Headers" value="AuthToken, Authorization, Origin, Content-Type, Accept, X-Requested-With" />
            
            <add name="Access-Control-Request-Methods" value="GET, POST, PUT, DELETE, OPTIONS" />
            
          </customHeaders>
          
        </httpProtocol>

        <handlers>
          <remove name="ExtensionlessUrlHandler-Integrated-4.0"/>
          <add name="ExtensionlessUrlHandler-Integrated-4.0" path="*." verb="*" type="System.Web.Handlers.TransferRequestHandler"
            preCondition="integratedMode,runtimeVersionv4.0"/>
        </handlers>


      </system.webServer>

方法二：直接取消 handlers

    <system.webServer>
        <httpProtocol>
          
          <customHeaders>
            <add name="Access-Control-Allow-Origin" value="*" />
            
            <add name="Access-Control-Allow-Headers" value="AuthToken, Authorization, Origin, Content-Type, Accept, X-Requested-With" />
            
            <add name="Access-Control-Request-Methods" value="GET, POST, PUT, DELETE, OPTIONS" />
            
          </customHeaders>
          
        </httpProtocol>

        


      </system.webServer>

其他
IIS的处理程序映射Mapping配置文件路径

C:\Windows\System32\inetsrv\config\applicationHost.config
参考的官方文档地址：

https://docs.microsoft.com/en-us/iis/configuration/system.webserver/handlers/add

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