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HTTP: Warning and test fix #943

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HTTP: Warning and test fix #943

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dc3eaad
Fix warning
heifner Oct 16, 2024
d507054
Update test for slow connections
heifner Oct 16, 2024
cfae058
Use f instead of r to be less confusing
heifner Oct 16, 2024
5ceda4c
Add verification that bytes_in_flight is 0
heifner Oct 16, 2024
995da77
Remove unneeded wait()s
heifner Oct 16, 2024
e8de934
Add a requests_in_flight and verify in test
heifner Oct 16, 2024
98db2f4
Add back original sleep
heifner Oct 17, 2024
f35f6f0
Replace sleep with a loop that waits for number of requests to be queued
heifner Oct 18, 2024
2b43faf
Fix while logic
heifner Oct 19, 2024
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2 changes: 1 addition & 1 deletion plugins/http_plugin/http_plugin.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -613,7 +613,7 @@ namespace eosio {
// returns true if `category` is enabled in http_plugin
bool http_plugin::is_enabled(api_category category) const {
return std::any_of(my->categories_by_address.begin(), my->categories_by_address.end(),
[&category, this](const auto& entry) {
[&category](const auto& entry) {
const auto& [address, categories] = entry;
return categories.contains(category);
});
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12 changes: 10 additions & 2 deletions plugins/http_plugin/tests/unit_tests.cpp
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Expand Up @@ -606,6 +606,8 @@ BOOST_FIXTURE_TEST_CASE(bytes_in_flight, http_plugin_test_fixture) {
req.set(http::field::host, "127.0.0.1:8891");
boost::beast::http::write(s, req);
}
//make sure got to the point http threads had responses queued
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why does it matter if the response is queued or not at this point?

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This avoids boost::beast::http::status::service_unavailable on my machine

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maybe after the boost::beast::http::write(s, req) try doing a s.wait(wait_read), that will guarantee that the response is in flight. just a guess though

std::this_thread::sleep_for(std::chrono::seconds(5));
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Why here sleeping 5 seconds but below sleeping 1 second?

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Because the 1s is not for 4mb messages.

};

auto drain_http_replies = [&](unsigned max = std::numeric_limits<unsigned>::max()) {
Expand Down Expand Up @@ -642,13 +644,14 @@ BOOST_FIXTURE_TEST_CASE(bytes_in_flight, http_plugin_test_fixture) {

//load up some more requests that exceed max
send_4mb_requests(32u);
//make sure got to the point http threads had responses queued
std::this_thread::sleep_for(std::chrono::seconds(1));
//now rip these connections out before the responses are completely sent
connections.clear();
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If I understood your description right, this is the area that is problematic. Between this line and the line below the http plugin needs to have cleaned up all its ownstanding async_writes. Just closing the socket here does indeed send the FIN but the http threads need time to wake up and handle that error on the async_write to then clear out what's in flight.

I wonder if what might work is to shutdown each connection and then async_read on each one until getting confirmation the remote side disconnected via an error code.

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That would likely work. I added a check for bytes_in_flight since that is really what we want to test anyway. We want to verify that bytes in flight goes to 0 once connections are closed.

//send some requests that should work still
send_4mb_requests(8u);
r = drain_http_replies();
for (const auto& e : r) {
ilog( "response: ${r}, count: ${c}", ("r", std::string(obsolete_reason(e.first)))("c", e.second));
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I almost thought the r in ${r} was the r in r = drain_http_replies().

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Changed

}
BOOST_REQUIRE_EQUAL(r[boost::beast::http::status::ok], 8u);
}

Expand Down Expand Up @@ -677,6 +680,8 @@ BOOST_FIXTURE_TEST_CASE(requests_in_flight, http_plugin_test_fixture) {
req.set(http::field::host, "127.0.0.1:8892");
boost::beast::http::write(s, req);
}
//make sure got to the point http threads had responses queued
std::this_thread::sleep_for(std::chrono::seconds(1));
};

auto scan_http_replies = [&]() {
Expand Down Expand Up @@ -712,6 +717,9 @@ BOOST_FIXTURE_TEST_CASE(requests_in_flight, http_plugin_test_fixture) {
//requests should still work
send_requests(8u);
r = scan_http_replies();
for (const auto& e : r) {
ilog( "response: ${r}, count: ${c}", ("r", std::string(obsolete_reason(e.first)))("c", e.second));
}
BOOST_REQUIRE_EQUAL(r[boost::beast::http::status::ok], 8u);
connections.clear();
}
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