这适用于我在表单身份验证下访问子目录中的 .png 文件。您应该能够更改扩展名。
<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<system.web>
<authorization>
<deny users="?" />
</authorization>
</system.web>
<system.webServer>
<staticContent>
<mimeMap fileExtension=".*" mimeType="image/png" />
</staticContent>
<handlers>
<clear />
<add name="StaticFile" path="*" verb="*" type="" modules="StaticFileModule,DefaultDocumentModule,DirectoryListingModule" scriptProcessor="" resourceType="Either" requireAccess="Read" allowPathInfo="false" preCondition="" responseBufferLimit="4194304" />
</handlers>
</system.webServer>
</configuration>
如果您将此问题中回答的 As添加OPTIONS
为动词会怎样。Access-Control-Allow-Methods
<system.webServer>
<httpProtocol>
<customHeaders>
<add name="Access-Control-Allow-Origin" value="*" />
<add name="Access-Control-Allow-Methods" value="GET,PUT,POST,DELETE,OPTIONS" />
<add name="Access-Control-Allow-Headers" value="Content-Type" />
</customHeaders>
</httpProtocol>
</system.webServer>