45 lines
1.5 KiB
C++
45 lines
1.5 KiB
C++
#include <mbgl/util/http_timeout.hpp>
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#include <mbgl/util/constants.hpp>
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#include <algorithm>
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#include <cassert>
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namespace mbgl {
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namespace http {
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Duration errorRetryTimeout(Response::Error::Reason failedRequestReason,
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uint32_t failedRequests,
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std::optional<Timestamp> retryAfter) {
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if (failedRequestReason == Response::Error::Reason::Server) {
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// Retry after one second three times, then start exponential backoff.
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return Seconds(failedRequests <= 3 ? 1 : 1u << std::min(failedRequests - 3, 31u));
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} else if (failedRequestReason == Response::Error::Reason::Connection) {
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// Immediate exponential backoff.
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assert(failedRequests > 0);
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return Seconds(1u << std::min(failedRequests - 1, 31u));
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} else if (failedRequestReason == Response::Error::Reason::RateLimit) {
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if (retryAfter) {
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return *retryAfter - util::now();
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} else {
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// Default
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return Seconds(util::DEFAULT_RATE_LIMIT_TIMEOUT);
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}
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} else {
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// No error, or not an error that triggers retries.
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return Duration::max();
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}
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}
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Duration expirationTimeout(std::optional<Timestamp> expires, uint32_t expiredRequests) {
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if (expiredRequests) {
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return Seconds(1u << std::min(expiredRequests - 1, 31u));
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}
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if (expires) {
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return std::max(Seconds::zero(), *expires - util::now());
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}
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return Duration::max();
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}
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} // namespace http
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} // namespace mbgl
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