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Revert "Fix 'error 9 while decompressing xz file'"

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This reverts commit 78fa47a7f0.
This commit is contained in:
Eelco Dolstra 2019-07-10 19:46:15 +02:00
parent aa739e7839
commit 03f09e1d18
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GPG key ID: 8170B4726D7198DE
7 changed files with 119 additions and 156 deletions
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67
src/libstore/download.cc
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@ -8,7 +8,6 @@
#include "compression.hh"
#include "pathlocks.hh"
#include "finally.hh"
#include "retry.hh"
#ifdef ENABLE_S3
#include <aws/core/client/ClientConfiguration.h>
@ -20,9 +19,11 @@
#include <curl/curl.h>
#include <algorithm>
#include <cmath>
#include <cstring>
#include <iostream>
#include <queue>
#include <random>
#include <thread>
using namespace std::string_literals;
@ -45,6 +46,9 @@ struct CurlDownloader : public Downloader
{
CURLM * curlm = 0;
std::random_device rd;
std::mt19937 mt19937;
struct DownloadItem : public std::enable_shared_from_this<DownloadItem>
{
CurlDownloader & downloader;
@ -57,6 +61,12 @@ struct CurlDownloader : public Downloader
bool active = false; // whether the handle has been added to the multi object
std::string status;
unsigned int attempt = 0;
/* Don't start this download until the specified time point
has been reached. */
std::chrono::steady_clock::time_point embargo;
struct curl_slist * requestHeaders = 0;
std::string encoding;
@ -377,7 +387,9 @@ struct CurlDownloader : public Downloader
}
}
fail(
attempt++;
auto exc =
code == CURLE_ABORTED_BY_CALLBACK && _isInterrupted
? DownloadError(Interrupted, fmt("%s of '%s' was interrupted", request.verb(), request.uri))
: httpStatus != 0
@ -388,15 +400,31 @@ struct CurlDownloader : public Downloader
)
: DownloadError(err,
fmt("unable to %s '%s': %s (%d)",
request.verb(), request.uri, curl_easy_strerror(code), code)));
request.verb(), request.uri, curl_easy_strerror(code), code));
/* If this is a transient error, then maybe retry the
download after a while. */
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));
printError(format("warning: %s; retrying in %d ms") % exc.what() % ms);
embargo = std::chrono::steady_clock::now() + std::chrono::milliseconds(ms);
downloader.enqueueItem(shared_from_this());
}
else
fail(exc);
}
}
};
struct State
{
struct EmbargoComparator {
bool operator() (const std::shared_ptr<DownloadItem> & i1, const std::shared_ptr<DownloadItem> & i2) {
return i1->embargo > i2->embargo;
}
};
bool quit = false;
std::vector<std::shared_ptr<DownloadItem>> incoming;
std::priority_queue<std::shared_ptr<DownloadItem>, std::vector<std::shared_ptr<DownloadItem>>, EmbargoComparator> incoming;
};
Sync<State> state_;
@ -409,6 +437,7 @@ struct CurlDownloader : public Downloader
std::thread workerThread;
CurlDownloader()
: mt19937(rd())
{
static std::once_flag globalInit;
std::call_once(globalInit, curl_global_init, CURL_GLOBAL_ALL);
@ -502,7 +531,9 @@ struct CurlDownloader : public Downloader
nextWakeup = std::chrono::steady_clock::time_point();
/* Add new curl requests from the incoming requests queue. */
/* Add new curl requests from the incoming requests queue,
except for requests that are embargoed (waiting for a
retry timeout to expire). */
if (extraFDs[0].revents & CURL_WAIT_POLLIN) {
char buf[1024];
auto res = read(extraFDs[0].fd, buf, sizeof(buf));
@ -511,9 +542,22 @@ struct CurlDownloader : public Downloader
}
std::vector<std::shared_ptr<DownloadItem>> incoming;
auto now = std::chrono::steady_clock::now();
{
auto state(state_.lock());
std::swap(state->incoming, incoming);
while (!state->incoming.empty()) {
auto item = state->incoming.top();
if (item->embargo <= now) {
incoming.push_back(item);
state->incoming.pop();
} else {
if (nextWakeup == std::chrono::steady_clock::time_point()
|| item->embargo < nextWakeup)
nextWakeup = item->embargo;
break;
}
}
quit = state->quit;
}
@ -540,7 +584,7 @@ struct CurlDownloader : public Downloader
{
auto state(state_.lock());
state->incoming.clear();
while (!state->incoming.empty()) state->incoming.pop();
state->quit = true;
}
}
@ -556,7 +600,7 @@ struct CurlDownloader : public Downloader
auto state(state_.lock());
if (state->quit)
throw nix::Error("cannot enqueue download request because the download thread is shutting down");
state->incoming.push_back(item);
state->incoming.push(item);
}
writeFull(wakeupPipe.writeSide.get(), " ");
}
@ -639,9 +683,7 @@ std::future<DownloadResult> Downloader::enqueueDownload(const DownloadRequest &
DownloadResult Downloader::download(const DownloadRequest & request)
{
return retry<DownloadResult>(request.tries, [&]() {
return enqueueDownload(request).get();
});
return enqueueDownload(request).get();
}
void Downloader::download(DownloadRequest && request, Sink & sink)
@ -827,7 +869,7 @@ CachedDownloadResult Downloader::downloadCached(
writeFile(dataFile, url + "\n" + res.etag + "\n" + std::to_string(time(0)) + "\n");
} catch (DownloadError & e) {
if (storePath.empty()) throw;
warn("%s; using cached result", e.msg());
printError(format("warning: %1%; using cached result") % e.msg());
result.etag = expectedETag;
}
}
@ -878,4 +920,5 @@ bool isUri(const string & s)
return scheme == "http" || scheme == "https" || scheme == "file" || scheme == "channel" || scheme == "git" || scheme == "s3" || scheme == "ssh";
}
}