让IIS静态网站支持跨域请求

<?xml version="1.0" encoding="utf-8"?>

<!--
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<configuration>
<system.web>
<compilation debug="true" strict="false" explicit="true" targetFramework="4.5" />
<httpRuntime targetFramework="4.5" />
</system.web>
<system.webServer>
<httpProtocol>
<customHeaders>
<add name="Access-Control-Allow-Origin" value="*" />
<add name="Access-Control-Allow-Headers" value="Content-Type" />
<add name="Access-Control-Allow-Methods" value="GET, POST, PUT, DELETE, OPTIONS" />
</customHeaders>
</httpProtocol>
<staticContent>
<remove fileExtension=".json" />
<mimeMap fileExtension=".json" mimeType="application/json" />
<remove fileExtension=".mp3" />
<mimeMap fileExtension=".mp3" mimeType="audio/x-mpeg" />
<remove fileExtension=".appcache" />
<mimeMap fileExtension=".appcache" mimeType="text/cache-manifest" />
</staticContent>
<directoryBrowse enabled="true" />
</system.webServer>
<location path="site.appcache">
<system.webServer>
<caching>
<profiles>
<add extension=".appcache" policy="DontCache" kernelCachePolicy="DontCache" />
</profiles>
</caching>
</system.webServer>
</location>
</configuration>