wifidog出现绿屏

wifidog有时会弹出如下页面：

这个页面是wifidog.conf 中HtmlMessageFile 指定的模板页面在wifidog 运行出错时再填充这个模板页面得到的页面，可以在wifidog 的源码中查看函数send_http_page 调用之处，即为页面出现的情况。
比如http.c中:

else if (!is_auth_online()) {
                /* The auth server is down at the moment - apologize and do not redirect anywhere */
                char * buf;
                safe_asprintf(&buf,
                        "<p>We apologize, but it seems that we are currently unable to re-direct you to the login screen.</p>"
                        "<p>The maintainers of this network are aware of this disruption.  We hope that this situation will be resolved soon.</p>"
                        "<p>In a couple of minutes please <a href='%s'>click here</a> to try your request again.</p>", tmp_url);

                send_http_page(r, "Uh oh! Login screen unavailable!", buf);
                free(buf);
                debug(LOG_INFO, "Sent %s an apology since auth server not online - no point sending them to auth server", r->clientAddr);
        }

这段代码其实就是显示上图的地方，send_http_page把HtmlMessageFile 的title 和内容message 提供给页面，然后就显示出来了。

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