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downloader: when retry but can't resume, retry the whole file

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Domen Kožar 2020-03-30 16:43:08 +02:00
parent e322a16523
commit 7827af1b67
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1 changed files with 7 additions and 9 deletions
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16
src/libstore/download.cc
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@ -308,7 +308,7 @@ struct CurlDownloader : public Downloader
curl_easy_setopt(req, CURLOPT_NETRC_FILE, settings.netrcFile.get().c_str());
curl_easy_setopt(req, CURLOPT_NETRC, CURL_NETRC_OPTIONAL);
if (writtenToSink)
if (writtenToSink && acceptRanges && encoding.empty())
curl_easy_setopt(req, CURLOPT_RESUME_FROM_LARGE, writtenToSink);
result.data = std::make_shared<std::string>();
@ -414,16 +414,14 @@ struct CurlDownloader : public Downloader
/* If this is a transient error, then maybe retry the
download after a while. If we're writing to a
sink, we can only retry if the server supports
ranged requests. */
if (err == Transient
&& attempt < request.tries
&& (!this->request.dataCallback
|| writtenToSink == 0
|| (acceptRanges && encoding.empty())))
sink, we can only resume if the server supports
ranged requests, otherwise fallback to a plain
retry.
*/
if (err == Transient && attempt < request.tries)
{
int ms = request.baseRetryTimeMs * std::pow(2.0f, attempt - 1 + std::uniform_real_distribution<>(0.0, 0.5)(downloader.mt19937));
if (writtenToSink)
if (writtenToSink && acceptRanges && encoding.empty())
warn("%s; retrying from offset %d in %d ms", exc.what(), writtenToSink, ms);
else
warn("%s; retrying in %d ms", exc.what(), ms);