Obtain header when exception is thrown

Open KingDuckZ opened this issue 5 years ago • 1 comments

The server I'm connecting to only accept a limited number of requests per day. The response header contains this information, like this:

HTTP/1.1 200 OK
Date: Mon, 22 Jun 2020 13:24:01 GMT
Content-Type: application/json
Content-Length: 1198
Connection: keep-alive
Set-Cookie: __cfduid=dda2f04d687c87c0f2eda6a4105be95e71592832241; expires=Wed, 22-Jul-20 13:24:01 GMT; path=/; domain=.originsro.org; HttpOnly; SameSite=Lax
X-RateLimit-Limit: 12
X-RateLimit-Remaining: 11
X-RateLimit-Reset: 1592835842
Retry-After: 3600
CF-Cache-Status: DYNAMIC
cf-request-id: 037dcc48ad0000066236a34200000001
Expect-CT: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
Server: cloudflare
CF-RAY: 5a7649877cc40662-LHR

X-Rate-Limit and Retry-After is what I'm after, and possibly X-RateLimit-Remaning as well. That is all good as I can grab that information from restc-cpp in normal situations, but when too many rquests are sent the server replies like this:

HTTP/1.1 429 TOO MANY REQUESTS
Date: Sun, 16 Aug 2020 15:06:51 GMT
Content-Type: text/html; charset=utf-8
Transfer-Encoding: chunked
Connection: keep-alive
Set-Cookie: __cfduid=dcff530e7dd3ce21af4b75531708104ea1597590411; expires=Tue, 15-Sep-20 15:06:51 GMT; path=/; domain=.originsro.org; HttpOnly; SameSite=Lax
X-RateLimit-Limit: 6
X-RateLimit-Remaining: 0
X-RateLimit-Reset: 1597672569
Retry-After: 82157
CF-Cache-Status: DYNAMIC
cf-request-id: 0499682fa20000dc4b342a4200000001
Expect-CT: max-age=604800, report-uri="https://report-uri.cloudflare.com/cdn-cgi/beacon/expect-ct"
Server: cloudflare
CF-RAY: 5c3c0fc5d8d3dc4b-LHR

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<title>429 Too Many Requests</title>
<h1>Too Many Requests</h1>
<p>6 per 1 day</p>

Which results in a c++ exception. I still need the data from the header to pause my program's timer for the correct amount of time, however restc-cpp throws with this backtrace:

#0  0x00007ffff7814a70 in __cxa_throw () from /usr/lib/gcc/x86_64-pc-linux-gnu/9.3.0/libstdc++.so.6
#1  0x00007ffff7eeaf06 in restc_cpp::RequestImpl::ValidateReply (this=0x7ffff0010f00, reply=...) at ../../../code/cpp/orotool/subprojects/restc-cpp/restc-cpp/src/RequestImpl.cpp:204
#2  0x00007ffff7eed2a6 in restc_cpp::RequestImpl::GetReply (this=0x7ffff0010f00, ctx=...) at ../../../code/cpp/orotool/subprojects/restc-cpp/restc-cpp/src/RequestImpl.cpp:484
#3  0x00007ffff7eed434 in restc_cpp::RequestImpl::DoExecute (this=0x7ffff0010f00, ctx=...) at ../../../code/cpp/orotool/subprojects/restc-cpp/restc-cpp/src/RequestImpl.cpp:498
#4  0x00007ffff7eeaa54 in restc_cpp::RequestImpl::Execute (this=0x7ffff0010f00, ctx=...) at ../../../code/cpp/orotool/subprojects/restc-cpp/restc-cpp/src/RequestImpl.cpp:146
#5  0x000055555560e70a in restc_cpp::RequestBuilder::Execute (this=0x7ffff0010690) at ../../../code/cpp/orotool/subprojects/restc-cpp/restc-cpp/include/restc-cpp/RequestBuilder.h:381
#6  0x0000555555603dae in oro::(anonymous namespace)::<lambda(restc_cpp::Context&)>::operator()(restc_cpp::Context &) const (this=0x7fffdc000e20, ctx=...)
    at ../../../code/cpp/orotool/src/oro/api.cpp:151

and, in case it's useful, you can see here api.cpp:151.

Is there any way I can retrieve the header info I'm looking for when the server replies with an error?

Aug 16 '20 15:08 KingDuckZ

This is actually something I have run into myself also recently. I'll look into it.

Aug 17 '20 16:08 jgaa