多个 Url 重写规则 - 最后得到 403

Multiple Url rewrite rules - got 403 on the last

我有以下规则,但是当我访问 https://myserver/myapp/sparoute/1 时,我得到的是 403 而不是 index.html

我在 myapp 的根目录下得到了这个配置:

   <system.webServer>
        <rewrite>
            <rules>
                <rule name="Reverse Proxy to API" stopProcessing="true">
                    <match url="api/(.*)" />
                    <conditions>
                        <add input="{CACHE_URL}" pattern="^(https?)://" />
                    </conditions>
                    <action type="Rewrite" url="https://internalserver/myapp/{R:0}" />
                </rule>
                <rule name="Reverse Proxy to Signalr" stopProcessing="true">
                    <match url="messagehub(.*)" />
                    <conditions>
                        <add input="{CACHE_URL}" pattern="^(https?)://" />
                    </conditions>
                    <action type="Rewrite" url="https://internalserver/myapp/{R:0}" />
                </rule>
                <rule name="Handle History Mode for SPA (myapp)" stopProcessing="true">
                    <match url="(.*)" />
                    <conditions logicalGrouping="MatchAll">
                        <add input="{REQUEST_FILENAME}" matchType="IsFile" negate="true" />
                        <add input="{REQUEST_FILENAME}" matchType="IsDirectory" negate="true" />
                    </conditions>
                    <action type="Rewrite" url="/" />
                </rule>
            </rules>
        </rewrite>
    </system.webServer>
</configuration>

前两个规则有效,但在重写为 / 时没有返回默认值 index.html,我得到了 403。有什么想法吗?

重写url与网站相关。所以最后一个动作应该是

<action type="Rewrite" url="/myapp" />