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80 lines
1.8 KiB
C++
80 lines
1.8 KiB
C++
#include "storage/pinger.hpp"
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#include "platform/http_client.hpp"
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#include "base/assert.hpp"
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#include "base/logging.hpp"
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#include "base/thread_pool_delayed.hpp"
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#include <chrono>
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namespace pinger
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{
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auto constexpr kTimeoutInSeconds = 4.0;
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int64_t constexpr kInvalidPing = -1;
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int64_t DoPing(std::string const & url)
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{
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using namespace std::chrono;
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if (url.empty())
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{
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ASSERT(false, ("Metaserver returned an empty url."));
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return kInvalidPing;
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}
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platform::HttpClient request(url);
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request.SetHttpMethod("HEAD");
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request.SetTimeout(kTimeoutInSeconds);
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auto const begin = high_resolution_clock::now();
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if (request.RunHttpRequest() && !request.WasRedirected() && request.ErrorCode() == 200)
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{
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return duration_cast<milliseconds>(high_resolution_clock::now() - begin).count();
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}
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else
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{
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LOG(LWARNING, ("Request to server", url, "failed with code =", request.ErrorCode(), "; redirection =", request.WasRedirected()));
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}
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return kInvalidPing;
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}
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} // namespace pinger
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namespace storage
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{
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// static
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Pinger::Endpoints Pinger::ExcludeUnavailableAndSortEndpoints(Endpoints const & urls)
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{
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auto const size = urls.size();
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CHECK_GREATER(size, 0, ());
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using EntryT = std::pair<int64_t, size_t>;
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std::vector<EntryT> timeUrls(size, {pinger::kInvalidPing, 0});
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{
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base::DelayedThreadPool pool(size, base::DelayedThreadPool::Exit::ExecPending);
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for (size_t i = 0; i < size; ++i)
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{
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pool.Push([&urls, &timeUrls, i]
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{
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timeUrls[i] = { pinger::DoPing(urls[i]), i };
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});
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}
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}
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std::sort(timeUrls.begin(), timeUrls.end(), [](EntryT const & e1, EntryT const & e2)
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{
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return e1.first < e2.first;
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});
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Endpoints readyUrls;
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for (auto const & [ping, index] : timeUrls)
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{
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if (ping >= 0)
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readyUrls.push_back(urls[index]);
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}
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return readyUrls;
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}
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} // namespace storage
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