void RequestError::fallbackErrorPage(Request* request,
const Exception& e,
const String& e2Name)
{
if (!request->headersSent())
{
request->setStatus(500);
request->sendHeaders();
}
request->stream() << "<h1>“" << e.type().htmlEscape() << "” exception</h1>"
<< "<p>" << e.htmlMessage() << "</p>"
<< "<p><strong>Additionally, a “" << e2Name
<< "” exception was encountered while handling the "
<< "exception.</strong></p>"
<< "<h2>Stack trace</h2><ol start=\"0\">";
List<StackTrace::Frame> stack = e.stackTrace()->stackFrames();
for (const StackTrace::Frame& frame : stack)
{
request->stream() << "<li><strong><code>" << frame.function.htmlEscape()
<< "</code></strong> (<code>0x"
<< String::fromNumber(frame.address, 16)
<< "</code>)<br />"
<< "<small>in <code>" << frame.object.relativePath()
<< "</code>, file <code>" << frame.fileName
<< "</code>, line " << frame.line << "</small></li>";
}
request->stream() << "</ol>";
}
void RequestError::exception(Request* request, Exception& e)
{
int code = 500;
if (e.type() == "NotFound")
code = 404;
else if (e.type() == "Forbidden")
code = 403;
if (code == 404)
System::log("NotFound", e.message(), request->ip());
else if (code == 403)
System::log("Forbidden", e.message(), System::Warning, request->ip());
else
System::log("Exceptions",
String("“%1” exception: %2.").format({e.type(), e.message()}),
System::Warning, request->ip());
#ifndef DEBUG
if (!request->headersSent())
request->setStatus(code);
Template* tpl = new Template("Errors/" + String(code) + ".html",
nullptr, request);
tpl->render();
delete tpl;
return;
#endif
try
{
View tpl = new Template("Sys::Exception.html", nullptr, request);
tpl["exceptionName"] = e.type();
tpl["exceptionMessage"] = e.htmlMessage();
tpl["webcppVersion"] = System::get()->version();
tpl["serverName"] = request->env("SERVER_NAME", "");
loadStackTrace(e, dynamic_cast<Template*>(*tpl));
if (!request->headersSent())
request->setStatus(500);
tpl->render();
}
catch (const Exception& e2)
{ fallbackErrorPage(request, e, e2.type()); }
catch (const std::exception& e2)
{ fallbackErrorPage(request, e, typeid(e2).name()); }
}