C++ OnlineFileSource::request方法代码示例

TEST(OnlineFileSource, TEST_REQUIRES_SERVER(RespectPriorExpires)) {
    util::RunLoop loop;
    OnlineFileSource fs;

    // Very long expiration time, should never arrive.
    Resource resource1{ Resource::Unknown, "http://127.0.0.1:3000/test" };
    resource1.priorExpires = util::now() + Seconds(100000);

    std::unique_ptr<AsyncRequest> req1 = fs.request(resource1, [&](Response) {
        FAIL() << "Should never be called";
    });

    // No expiration time, should be requested immediately.
    Resource resource2{ Resource::Unknown, "http://127.0.0.1:3000/test" };

    std::unique_ptr<AsyncRequest> req2 = fs.request(resource2, [&](Response) {
        loop.stop();
    });

    // Very long expiration time, should never arrive.
    Resource resource3{ Resource::Unknown, "http://127.0.0.1:3000/test" };
    resource3.priorExpires = util::now() + Seconds(100000);

    std::unique_ptr<AsyncRequest> req3 = fs.request(resource3, [&](Response) {
        FAIL() << "Should never be called";
    });

    loop.run();
}

TEST(OnlineFileSource, TEST_REQUIRES_SERVER(ConnectionError)) {
    util::RunLoop loop;
    OnlineFileSource fs;

    const auto start = Clock::now();

    std::unique_ptr<AsyncRequest> req = fs.request({ Resource::Unknown, "http://127.0.0.1:3001/" }, [&](Response res) {
        static int counter = 0;
        static int wait = 0;
        const auto duration = std::chrono::duration<const double>(Clock::now() - start).count();
        EXPECT_LT(wait - 0.01, duration) << "Backoff timer didn't wait 1 second";
        EXPECT_GT(wait + 0.2, duration) << "Backoff timer fired too late";
        ASSERT_NE(nullptr, res.error);
        EXPECT_EQ(Response::Error::Reason::Connection, res.error->reason);
        ASSERT_FALSE(res.data.get());
        EXPECT_FALSE(bool(res.expires));
        EXPECT_FALSE(bool(res.modified));
        EXPECT_FALSE(bool(res.etag));

        if (counter == 2) {
            req.reset();
            loop.stop();
        }
        wait += (1 << counter);
        counter++;
    });

    loop.run();
}

TEST(OnlineFileSource, TEST_REQUIRES_SERVER(RetryOnClockSkew)) {
    util::RunLoop loop;
    OnlineFileSource fs;

    int counter = 0;

    const Resource resource { Resource::Unknown, "http://127.0.0.1:3000/clockskew" };
    std::unique_ptr<AsyncRequest> req1 = fs.request(resource, [&](Response res) {
        switch (counter++) {
        case 0: {
            EXPECT_EQ(nullptr, res.error);
            EXPECT_GT(util::now(), res.expires);
        } break;
        case 1: {
            EXPECT_EQ(nullptr, res.error);

            auto now = util::now();
            EXPECT_LT(now + Seconds(40), res.expires) << "Expiration not interpolated to 60s";
            EXPECT_GT(now + Seconds(80), res.expires) << "Expiration not interpolated to 60s";

            loop.stop();
        } break;
        }
    });

    loop.run();
}

TEST(OnlineFileSource, TEST_REQUIRES_SERVER(RateLimitStandard)) {
    util::RunLoop loop;
    OnlineFileSource fs;
    
    auto req = fs.request({ Resource::Unknown, "http://127.0.0.1:3000/rate-limit?std=true" }, [&](Response res) {
        ASSERT_NE(nullptr, res.error);
        EXPECT_EQ(Response::Error::Reason::RateLimit, res.error->reason);
        ASSERT_EQ(true, bool(res.error->retryAfter));
        ASSERT_LT(util::now(), res.error->retryAfter);
        loop.stop();
    });
    
    loop.run();
}

// Tests that a change in network status preempts requests that failed due to connection or
// reachability issues.
TEST(OnlineFileSource, TEST_REQUIRES_SERVER(NetworkStatusChangePreempt)) {
    util::RunLoop loop;
    OnlineFileSource fs;

    const auto start = Clock::now();

    const Resource resource{ Resource::Unknown, "http://127.0.0.1:3001/test" };
    std::unique_ptr<AsyncRequest> req = fs.request(resource, [&](Response res) {
        static int counter = 0;
        const auto duration = std::chrono::duration<const double>(Clock::now() - start).count();
        if (counter == 0) {
            EXPECT_GT(0.2, duration) << "Response came in too late";
        } else if (counter == 1) {
            EXPECT_LT(0.39, duration) << "Preempted retry triggered too early";
            EXPECT_GT(0.6, duration) << "Preempted retry triggered too late";
        } else if (counter > 1) {
            FAIL() << "Retried too often";
        }
        ASSERT_NE(nullptr, res.error);
        EXPECT_EQ(Response::Error::Reason::Connection, res.error->reason);
        ASSERT_FALSE(res.data.get());
        EXPECT_FALSE(bool(res.expires));
        EXPECT_FALSE(bool(res.modified));
        EXPECT_FALSE(bool(res.etag));

        if (counter++ == 1) {
            req.reset();
            loop.stop();
        }
    });

    // After 400 milliseconds, we're going to trigger a NetworkStatus change.
    util::Timer reachableTimer;
    reachableTimer.start(Milliseconds(400), Duration::zero(), [] () {
        mbgl::NetworkStatus::Reachable();
    });

    loop.run();
}

TEST(OnlineFileSource, TEST_REQUIRES_SERVER(Load)) {
    util::RunLoop loop;
    OnlineFileSource fs;

    const int concurrency = 50;
    const int max = 10000;
    int number = 1;

    std::unique_ptr<AsyncRequest> reqs[concurrency];

    std::function<void(int)> req = [&](int i) {
        const auto current = number++;
        reqs[i] = fs.request({ Resource::Unknown,
                     std::string("http://127.0.0.1:3000/load/") + std::to_string(current) },
                   [&, i, current](Response res) {
            reqs[i].reset();
            EXPECT_EQ(nullptr, res.error);
            ASSERT_TRUE(res.data.get());
            EXPECT_EQ(std::string("Request ") +  std::to_string(current), *res.data);
            EXPECT_FALSE(bool(res.expires));
            EXPECT_FALSE(bool(res.modified));
            EXPECT_FALSE(bool(res.etag));

            if (number <= max) {
                req(i);
            } else if (current == max) {
                loop.stop();
            }
        });
    };

    for (int i = 0; i < concurrency; i++) {
        req(i);
    }

    loop.run();
}

    std::unique_ptr<AsyncRequest> req1 = fs.request({ Resource::Unknown, "http://127.0.0.1:3000/temporary-error" }, [&](Response res) {
        static int counter = 0;
        switch (counter++) {
        case 0: {
            const auto duration = std::chrono::duration<const double>(Clock::now() - start).count();
            EXPECT_GT(0.2, duration) << "Initial error request took too long";
            ASSERT_NE(nullptr, res.error);
            EXPECT_EQ(Response::Error::Reason::Server, res.error->reason);
            EXPECT_EQ("HTTP status code 500", res.error->message);
            ASSERT_FALSE(bool(res.data));
            EXPECT_FALSE(bool(res.expires));
            EXPECT_FALSE(bool(res.modified));
            EXPECT_FALSE(bool(res.etag));
        } break;
        case 1: {
            req1.reset();
            const auto duration = std::chrono::duration<const double>(Clock::now() - start).count();
            EXPECT_LT(0.99, duration) << "Backoff timer didn't wait 1 second";
            EXPECT_GT(1.2, duration) << "Backoff timer fired too late";
            EXPECT_EQ(nullptr, res.error);
            ASSERT_TRUE(res.data.get());
            EXPECT_EQ("Hello World!", *res.data);
            EXPECT_FALSE(bool(res.expires));
            EXPECT_FALSE(bool(res.modified));
            EXPECT_FALSE(bool(res.etag));
            loop.stop();
            HTTPTemporaryError.finish();
        } break;
        }
    });

TEST_F(Storage, HTTPExpiresParsing) {
    SCOPED_TEST(HTTPExpiresTest)

    using namespace mbgl;

    util::RunLoop loop;
    OnlineFileSource fs(nullptr);

    std::unique_ptr<FileRequest> req1 = fs.request({ Resource::Unknown,
                 "http://127.0.0.1:3000/test?modified=1420794326&expires=1420797926&etag=foo" },
               [&](Response res) {
        req1.reset();
        EXPECT_EQ(nullptr, res.error);
        EXPECT_EQ(false, res.stale);
        ASSERT_TRUE(res.data.get());
        EXPECT_EQ("Hello World!", *res.data);
        EXPECT_EQ(1420797926, res.expires.count());
        EXPECT_EQ(1420794326, res.modified.count());
        EXPECT_EQ("foo", res.etag);
        loop.stop();
        HTTPExpiresTest.finish();
    });

    loop.run();
}

TEST_F(Storage, HTTPCacheControlParsing) {
    SCOPED_TEST(HTTPCacheControlTest)

    using namespace mbgl;

    int number = 1;

    std::unique_ptr<FileRequest> reqs[concurrency];

    std::function<void(int)> req = [&](int i) {
        const auto current = number++;
        reqs[i] = fs.request({ Resource::Unknown,
                     std::string("http://127.0.0.1:3000/load/") + std::to_string(current) },
                   [&, i, current](Response res) {
            reqs[i].reset();
            EXPECT_EQ(nullptr, res.error);
            EXPECT_EQ(false, res.stale);
            ASSERT_TRUE(res.data.get());
            EXPECT_EQ(std::string("Request ") +  std::to_string(current), *res.data);
            EXPECT_EQ(Seconds::zero(), res.expires);
            EXPECT_EQ(Seconds::zero(), res.modified);
            EXPECT_EQ("", res.etag);

            if (number <= max) {
                req(i);
            } else if (current == max) {
                loop.stop();
                HTTPLoad.finish();
            }
        });
    };


    for (int i = 0; i < concurrency; i++) {
        req(i);
    }

#include <mbgl/storage/network_status.hpp>
#include <mbgl/util/chrono.hpp>
#include <mbgl/util/run_loop.hpp>

#include <cmath>

TEST_F(Storage, HTTPCancel) {
    SCOPED_TEST(HTTPCancel)

    using namespace mbgl;

    util::RunLoop loop;
    OnlineFileSource fs(nullptr);

    auto req =
        fs.request({ Resource::Unknown, "http://127.0.0.1:3000/test" },
                   [&](Response) { ADD_FAILURE() << "Callback should not be called"; });

    req.reset();
    HTTPCancel.finish();

    loop.runOnce();
}

TEST_F(Storage, HTTPCancelMultiple) {
    SCOPED_TEST(HTTPCancelMultiple)

    using namespace mbgl;

    util::RunLoop loop;
    OnlineFileSource fs(nullptr);

TEST_F(Storage, HTTPTest) {
    SCOPED_TEST(HTTPTest)

    using namespace mbgl;

    util::RunLoop loop;
    OnlineFileSource fs(nullptr);

    std::unique_ptr<FileRequest> req1 = fs.request({ Resource::Unknown, "http://127.0.0.1:3000/test" },
               [&](Response res) {
        req1.reset();
        EXPECT_TRUE(util::ThreadContext::currentlyOn(util::ThreadType::Main));
        EXPECT_EQ(nullptr, res.error);
        ASSERT_TRUE(res.data.get());
        EXPECT_EQ("Hello World!", *res.data);
        EXPECT_FALSE(bool(res.expires));
        EXPECT_FALSE(bool(res.modified));
        EXPECT_FALSE(bool(res.etag));
        loop.stop();
        HTTPTest.finish();
    });

    loop.run();
}

TEST_F(Storage, HTTP404) {
    SCOPED_TEST(HTTP404)

    using namespace mbgl;

    SCOPED_TEST(HTTPNetworkStatusChange)

    using namespace mbgl;

    util::RunLoop loop;
    OnlineFileSource fs(nullptr);

    const Resource resource { Resource::Unknown, "http://127.0.0.1:3000/delayed" };

    // This request takes 200 milliseconds to answer.
    std::unique_ptr<FileRequest> req = fs.request(resource, [&](Response res) {
         req.reset();
         EXPECT_EQ(nullptr, res.error);
         ASSERT_TRUE(res.data.get());
         EXPECT_EQ("Response", *res.data);
         EXPECT_FALSE(bool(res.expires));
         EXPECT_FALSE(bool(res.modified));
         EXPECT_FALSE(bool(res.etag));
         loop.stop();
         HTTPNetworkStatusChange.finish();
    });

    // After 50 milliseconds, we're going to trigger a NetworkStatus change.
    util::Timer reachableTimer;
    reachableTimer.start(Milliseconds(50), Duration::zero(), [] () {
        mbgl::NetworkStatus::Reachable();
    });

    // This timer will keep the loop alive to make sure we would be getting a response in caes the
    // network status change triggered another change (which it shouldn't).
    util::Timer delayTimer;