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HttpBinaryCacheStore: Retry on transient HTTP errors

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This makes us more robust against 500 errors from CloudFront or S3
(assuming the 500 error isn't cached by CloudFront...).
This commit is contained in:
Eelco Dolstra 2016-08-10 16:06:33 +02:00
parent 9204ea7294
commit 66adbdfd97
3 changed files with 34 additions and 14 deletions
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11
src/libstore/download.hh
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@ -9,10 +9,11 @@ namespace nix {
struct DownloadOptions
{
string expectedETag;
bool verifyTLS{true};
enum { yes, no, automatic } showProgress{yes};
bool head{false};
std::string expectedETag;
bool verifyTLS = true;
enum { yes, no, automatic } showProgress = yes;
bool head = false;
size_t tries = 1;
};
struct DownloadResult
@ -31,7 +32,7 @@ struct Downloader
Path downloadCached(ref<Store> store, const string & url, bool unpack,
const Hash & expectedHash = Hash());
enum Error { NotFound, Forbidden, Misc };
enum Error { NotFound, Forbidden, Misc, Transient };
};
ref<Downloader> makeDownloader();