<!--
    - Policies are applied in the order they appear.
    - Position <base/> inside a section to inherit policies from the outer scope.
    - Comments within policies are not preserved.
-->
<!-- Add policies as children to the <inbound>, <outbound>, <backend>, and <on-error> elements -->

<policies>
  <inbound>
    <base />
    <choose>
      <when condition="@(context.Request.Method == 'POST')">
        <set-variable name="bodySize" value="@(context.Request.Headers['Content-Length'][0])" />
        <choose>
          <when condition="@(int.Parse(context.Variables.GetValueOrDefault<string>('bodySize')) < 52428800)">
            <!-- 請求體小于 50MB，允許通過 -->
          </when>
          <otherwise>
            <return-response>
              <set-status code="413" reason="Payload Too Large" />
              <set-body>@{
                return "Maximum allowed size for the POST requests is 52428800 bytes (50 MB). This request has size of " + context.Variables.GetValueOrDefault<string>("bodySize") + " bytes";
              }</set-body>
            </return-response>
          </otherwise>
        </choose>
      </when>
    </choose>
  </inbound>
  <backend>
    <base />
  </backend>
  <outbound>
        </outbound>
  <on-error>
    <base />
  </on-error>
</policies>