.net webapi项目跨域问题及解决方案

问题：

1.项目完成，部署到不同的iis版本上，跨域访问有的通有的不通

解决办法：

1.将复杂请求改为简单请求

2.代码中去掉所有跨域设置，配置中添加或修改节点

<system.webServer>
<modules>
<add name="ApplicationInsightsWebTracking" type="Microsoft.ApplicationInsights.Web.ApplicationInsightsHttpModule, Microsoft.AI.Web" preCondition="managedHandler" />
</modules>
<validation validateIntegratedModeConfiguration="false" />
<httpProtocol>
<customHeaders>
<add name="Access-Control-Allow-Origin" value="*" />
<add name="Access-Control-Allow-Methods" value="POST,GET" />
<add name="Access-Control-Allow-Headers" value="x-requested-with,content-type,authorization,mypara,username" />
</customHeaders>
</httpProtocol>
</system.webServer>

<system.webServer>
<modules>
<remove name="FormsAuthentication" />
<remove name="ApplicationInsightsWebTracking" />
<add name="ApplicationInsightsWebTracking" type="Microsoft.ApplicationInsights.Web.ApplicationInsightsHttpModule, Microsoft.AI.Web" preCondition="managedHandler" />
</modules>
<validation validateIntegratedModeConfiguration="false" />
<httpProtocol>
<customHeaders>
<add name="Access-Control-Allow-Origin" value="*" />
<add name="Access-Control-Allow-Methods" value="OPTIONS,GET,POST,PUT,DELETE" />
<add name="Access-Control-Allow-Headers" value="x-requested-with,content-type,authorization,mypara,username" />
</customHeaders>
</httpProtocol>
</system.webServer>

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