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olivierg
Asked: 2025-02-07 22:04:53 +0800 CST

Apache 反向代理：打印后端返回的错误，而不仅仅是“错误 500”

  • 772

我有一个 apache 服务器充当 web 服务的反向代理，其配置如下：

<VirtualHost *:18010>

 SSLEngine on
 ProxyRequests off
 SSLProxyEngine on
 ProxyPass / https://backend.url:4445/
 ProxyPassReverse / https://backend.url:4445/
 SSLVerifyClient require
 SSLVerifyDepth 10
 SSLCACertificateFile ssl/cacerts.pem

</VirtualHost>

运行良好。但是，当“客户端”针对 URL 后面运行的 WebService 运行查询时，如果后端响应错误，则代理仅显示存在错误 500，例如：

<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>500 Internal Server Error</title>
</head><body>
<h1>Internal Server Error</h1>
<p>The server encountered an internal error or
misconfiguration and was unable to complete
your request.</p>
<p>Please contact the server administrator at
 [email protected] to inform them of the time this error occurred,
 and the actions you performed just before this error.</p>
<p>More information about this error may be available
in the server error log.</p>
</body></html>

而当“直接”（不通过代理）查询WebService时，我们可以看到服务器返回的“真实”错误，例如：

Error 500: javax.servlet.ServletException: org.codehaus.jackson.map.exc.UnrecognizedPropertyException: Unrecognized field &quot;test&quot; &#40;Class iseries.wsbeans.avews10.PrecheckInput&#41;, not marked
 at [Source: com.ibm.ws.webcontainer.srt.SRTInputStream@6bd1f156&#59; line: 1, column: 11] &#40;through reference chain: iseries.wsbeans.avews10.PrecheckPaymentInput[&quot;test&quot;]&#41;

所以我的问题是：是否有一个选项可以添加 apache 配置，以便它返回后端返回的完整错误，而不仅仅是错误 500？

再次感谢问候，

apache-2.4

1 个回答

  1. Best Answer

    禁用 Apache 的错误页面覆盖以允许将实际错误返回给客户端。

    <VirtualHost *:18010>
    ...
    # Disable Apache's error page override
    ProxyErrorOverride off
</VirtualHost>

    https://httpd.apache.org/docs/2.4/mod/mod_proxy.html#proxyerroroverride

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