blob: 04842e48beeea52b600f331d24996e332d99f535 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
|
#include <mbgl/util/http_timeout.hpp>
#include <mbgl/util/constants.hpp>
#include <algorithm>
#include <cassert>
namespace mbgl {
namespace http {
Duration errorRetryTimeout(Response::Error::Reason failedRequestReason, uint32_t failedRequests, optional<Timestamp> retryAfter) {
if (failedRequestReason == Response::Error::Reason::Server) {
// Retry after one second three times, then start exponential backoff.
return Seconds(failedRequests <= 3 ? 1 : 1u << std::min(failedRequests - 3, 31u));
} else if (failedRequestReason == Response::Error::Reason::Connection) {
// Immediate exponential backoff.
assert(failedRequests > 0);
return Seconds(1u << std::min(failedRequests - 1, 31u));
} else if (failedRequestReason == Response::Error::Reason::RateLimit) {
if (retryAfter) {
return *retryAfter - util::now();
} else {
// Default
return Seconds(util::DEFAULT_RATE_LIMIT_TIMEOUT);
}
} else {
// No error, or not an error that triggers retries.
return Duration::max();
}
}
Duration expirationTimeout(optional<Timestamp> expires, uint32_t expiredRequests) {
if (expiredRequests) {
return Seconds(1u << std::min(expiredRequests - 1, 31u));
} else if (expires) {
return std::max(Seconds::zero(), *expires - util::now());
} else {
return Duration::max();
}
}
} // namespace http
} // namespace mbgl
|