forked from lix-project/lix
Merge changes I0220cedd,Ide0c0512,I6fcd920e,I85ec62ff,I35853a91, ... into main
* changes: libstore: check that transfer headers don't change during retries libstore: use effective transfer url for retries libstore: collect effective url and cachedness earlier libstore: remove TransferItem::active libstore: always allocate TransferItem::req libstore: remove FileTransferResult::data libstore: de-future-ize FileTransfer::enqueueUpload libstore: remove FileTransferRequest libstore: remove FileTransferRequest::expectedETag libstore: remove FileTransferResult::bodySize libstore: remove FileTransferRequest::verifyTLS libstore: remove FiletransferRequest::head
This commit is contained in:
Gerrit Code Review
commit
61146c73ce
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@ -209,7 +209,7 @@ DownloadFileResult downloadFile(
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const std::string & url,
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const std::string & name,
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bool locked,
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const Headers & headers = {});
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Headers headers = {});
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struct DownloadTarballResult
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{
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@ -15,7 +15,7 @@ DownloadFileResult downloadFile(
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const std::string & url,
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const std::string & name,
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bool locked,
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const Headers & headers)
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Headers headers)
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{
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// FIXME: check store
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@ -40,13 +40,12 @@ DownloadFileResult downloadFile(
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if (cached && !cached->expired)
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return useCached();
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FileTransferRequest request(url);
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request.headers = headers;
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if (cached)
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request.expectedETag = getStrAttr(cached->infoAttrs, "etag");
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headers.emplace_back("If-None-Match", getStrAttr(cached->infoAttrs, "etag"));
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FileTransferResult res;
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std::string data;
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try {
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res = getFileTransfer()->enqueueDownload(request).get();
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std::tie(res, data) = getFileTransfer()->enqueueDownload(url, headers).get();
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} catch (FileTransferError & e) {
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if (cached) {
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warn("%s; using cached version", e.msg());
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@ -71,8 +70,8 @@ DownloadFileResult downloadFile(
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storePath = std::move(cached->storePath);
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} else {
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StringSink sink;
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sink << dumpString(res.data);
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auto hash = hashString(HashType::SHA256, res.data);
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sink << dumpString(data);
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auto hash = hashString(HashType::SHA256, data);
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ValidPathInfo info {
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*store,
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name,
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@ -36,9 +36,7 @@ void builtinFetchurl(const BasicDerivation & drv, const std::string & netrcData,
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auto fetch = [&](const std::string & url) {
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FileTransferRequest request(url);
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auto raw = fileTransfer->download(std::move(request));
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auto raw = fileTransfer->download(url);
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auto decompressor = makeDecompressionSource(
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unpack && mainUrl.ends_with(".xz") ? "xz" : "none", *raw);
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@ -44,19 +44,33 @@ struct curlFileTransfer : public FileTransfer
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struct TransferItem : public std::enable_shared_from_this<TransferItem>
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{
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curlFileTransfer & fileTransfer;
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FileTransferRequest request;
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std::string uri;
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FileTransferResult result;
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Activity act;
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std::optional<std::string> uploadData;
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bool done = false; // whether either the success or failure function has been called
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std::packaged_task<FileTransferResult(std::exception_ptr, FileTransferResult)> callback;
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std::string downloadData;
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bool noBody = false; // \equiv HTTP HEAD, don't download data
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enum {
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/// nothing has been transferred yet
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initialSetup,
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/// at least some metadata has already been transferred,
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/// but the transfer did not succeed and is now retrying
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retrySetup,
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/// data transfer in progress
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transferring,
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/// transfer complete, result or failure reported
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transferComplete,
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} phase = initialSetup;
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std::packaged_task<
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std::pair<FileTransferResult, std::string>(std::exception_ptr, FileTransferResult)>
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callback;
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std::function<void(TransferItem &, std::string_view data)> dataCallback;
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CURL * req = 0;
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bool active = false; // whether the handle has been added to the multi object
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CURL * req; // must never be nullptr
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std::string statusMsg;
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unsigned int attempt = 0;
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const size_t tries = fileTransferSettings.tries;
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uint64_t bodySize = 0;
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/* Don't start this download until the specified time point
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has been reached. */
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@ -88,43 +102,45 @@ struct curlFileTransfer : public FileTransfer
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}
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TransferItem(curlFileTransfer & fileTransfer,
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const FileTransferRequest & request,
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const std::string & uri,
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const Headers & headers,
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ActivityId parentAct,
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std::invocable<std::exception_ptr> auto callback,
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std::function<void(TransferItem &, std::string_view data)> dataCallback,
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std::optional<std::string> uploadData
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std::optional<std::string> uploadData,
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bool noBody
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)
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: fileTransfer(fileTransfer)
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, request(request)
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, uri(uri)
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, act(*logger, lvlTalkative, actFileTransfer,
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fmt(uploadData ? "uploading '%s'" : "downloading '%s'", request.uri),
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{request.uri}, parentAct)
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fmt(uploadData ? "uploading '%s'" : "downloading '%s'", uri),
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{uri}, parentAct)
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, uploadData(std::move(uploadData))
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, callback([cb{std::move(callback)}] (std::exception_ptr ex, FileTransferResult r) {
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, noBody(noBody)
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, callback([this, cb{std::move(callback)}] (std::exception_ptr ex, FileTransferResult r) {
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cb(ex);
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return r;
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return std::pair{std::move(r), std::move(downloadData)};
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})
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, dataCallback(std::move(dataCallback))
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, req(curl_easy_init())
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{
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if (req == nullptr) {
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throw FileTransferError(Misc, {}, "could not allocate curl handle");
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}
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requestHeaders = curl_slist_append(requestHeaders, "Accept-Encoding: zstd, br, gzip, deflate, bzip2, xz");
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if (!request.expectedETag.empty())
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requestHeaders = curl_slist_append(requestHeaders, ("If-None-Match: " + request.expectedETag).c_str());
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for (auto it = request.headers.begin(); it != request.headers.end(); ++it){
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for (auto it = headers.begin(); it != headers.end(); ++it){
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requestHeaders = curl_slist_append(requestHeaders, fmt("%s: %s", it->first, it->second).c_str());
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}
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}
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~TransferItem()
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{
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if (req) {
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if (active)
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curl_multi_remove_handle(fileTransfer.curlm, req);
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curl_easy_cleanup(req);
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}
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curl_multi_remove_handle(fileTransfer.curlm, req);
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curl_easy_cleanup(req);
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if (requestHeaders) curl_slist_free_all(requestHeaders);
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try {
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if (!done)
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fail(FileTransferError(Interrupted, {}, "download of '%s' was interrupted", request.uri));
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if (phase != transferComplete)
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fail(FileTransferError(Interrupted, {}, "download of '%s' was interrupted", uri));
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} catch (...) {
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ignoreExceptionInDestructor();
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}
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@ -132,8 +148,8 @@ struct curlFileTransfer : public FileTransfer
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void failEx(std::exception_ptr ex)
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{
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assert(!done);
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done = true;
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assert(phase != transferComplete);
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phase = transferComplete;
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callback(ex, std::move(result));
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}
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@ -143,25 +159,55 @@ struct curlFileTransfer : public FileTransfer
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failEx(std::make_exception_ptr(std::forward<T>(e)));
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}
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std::exception_ptr writeException;
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[[noreturn]]
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void throwChangedTarget(std::string_view what, std::string_view from, std::string_view to)
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{
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throw FileTransferError(
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Misc, {}, "uri %s changed %s from %s to %s during transfer", uri, what, from, to
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);
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}
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void maybeFinishSetup()
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{
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if (phase > retrySetup) {
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return;
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}
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char * effectiveUriCStr = nullptr;
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curl_easy_getinfo(req, CURLINFO_EFFECTIVE_URL, &effectiveUriCStr);
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if (effectiveUriCStr) {
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if (!result.effectiveUri.empty() && result.effectiveUri != effectiveUriCStr) {
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throwChangedTarget("final destination", result.effectiveUri, effectiveUriCStr);
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}
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result.effectiveUri = effectiveUriCStr;
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}
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result.cached = getHTTPStatus() == 304;
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phase = transferring;
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}
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std::exception_ptr callbackException;
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size_t writeCallback(void * contents, size_t size, size_t nmemb)
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{
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const size_t realSize = size * nmemb;
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try {
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result.bodySize += realSize;
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maybeFinishSetup();
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bodySize += realSize;
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if (successfulStatuses.count(getHTTPStatus()) && this->dataCallback) {
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writtenToSink += realSize;
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dataCallback(*this, {static_cast<const char *>(contents), realSize});
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} else {
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this->result.data.append(static_cast<const char *>(contents), realSize);
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this->downloadData.append(static_cast<const char *>(contents), realSize);
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}
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return realSize;
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} catch (...) {
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writeException = std::current_exception();
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callbackException = std::current_exception();
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return CURL_WRITEFUNC_ERROR;
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}
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}
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@ -172,30 +218,39 @@ struct curlFileTransfer : public FileTransfer
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}
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size_t headerCallback(void * contents, size_t size, size_t nmemb)
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{
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try {
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size_t realSize = size * nmemb;
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std::string line(static_cast<char *>(contents), realSize);
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printMsg(lvlVomit, "got header for '%s': %s", request.uri, trim(line));
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printMsg(lvlVomit, "got header for '%s': %s", uri, trim(line));
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static std::regex statusLine("HTTP/[^ ]+ +[0-9]+(.*)", std::regex::extended | std::regex::icase);
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if (std::smatch match; std::regex_match(line, match, statusLine)) {
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result.etag = "";
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result.data.clear();
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result.bodySize = 0;
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downloadData.clear();
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bodySize = 0;
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statusMsg = trim(match.str(1));
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acceptRanges = false;
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encoding = "";
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} else {
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auto i = line.find(':');
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if (i != std::string::npos) {
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std::string name = toLower(trim(line.substr(0, i)));
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if (name == "etag") {
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result.etag = trim(line.substr(i + 1));
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// NOTE we don't check that the etag hasn't gone *missing*. technically
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// this is not an error as long as we get the same data from the remote.
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auto etag = trim(line.substr(i + 1));
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if (!result.etag.empty() && result.etag != etag) {
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throwChangedTarget("ETag", result.etag, etag);
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}
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result.etag = std::move(etag);
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}
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else if (name == "content-encoding")
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encoding = trim(line.substr(i + 1));
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else if (name == "content-encoding") {
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auto encoding = trim(line.substr(i + 1));
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if (!this->encoding.empty() && this->encoding != encoding) {
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throwChangedTarget("encoding", this->encoding, encoding);
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}
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this->encoding = std::move(encoding);
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}
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else if (name == "accept-ranges" && toLower(trim(line.substr(i + 1))) == "bytes")
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acceptRanges = true;
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@ -203,14 +258,20 @@ struct curlFileTransfer : public FileTransfer
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else if (name == "link" || name == "x-amz-meta-link") {
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auto value = trim(line.substr(i + 1));
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static std::regex linkRegex("<([^>]*)>; rel=\"immutable\"", std::regex::extended | std::regex::icase);
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if (std::smatch match; std::regex_match(value, match, linkRegex))
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if (std::smatch match; std::regex_match(value, match, linkRegex)) {
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if (result.immutableUrl && result.immutableUrl != match.str(1)) {
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throwChangedTarget("immutable url", *result.immutableUrl, match.str(1));
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}
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result.immutableUrl = match.str(1);
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else
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} else
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debug("got invalid link header '%s'", value);
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}
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}
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}
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return realSize;
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} catch (...) {
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callbackException = std::current_exception();
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return CURL_WRITEFUNC_ERROR;
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}
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static size_t headerCallbackWrapper(void * contents, size_t size, size_t nmemb, void * userp)
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@ -262,7 +323,9 @@ struct curlFileTransfer : public FileTransfer
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void init()
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{
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if (!req) req = curl_easy_init();
|
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if (phase > initialSetup) {
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phase = retrySetup;
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}
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curl_easy_reset(req);
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@ -271,7 +334,11 @@ struct curlFileTransfer : public FileTransfer
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curl_easy_setopt(req, CURLOPT_DEBUGFUNCTION, TransferItem::debugCallback);
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}
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curl_easy_setopt(req, CURLOPT_URL, request.uri.c_str());
|
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// use the effective URI of the previous transfer for retries. this avoids
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||||
// some silent corruption if a redirect changes between starting and retry.
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const auto & uri = result.effectiveUri.empty() ? this->uri : result.effectiveUri;
|
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|
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curl_easy_setopt(req, CURLOPT_URL, uri.c_str());
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curl_easy_setopt(req, CURLOPT_FOLLOWLOCATION, 1L);
|
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curl_easy_setopt(req, CURLOPT_MAXREDIRS, 10);
|
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curl_easy_setopt(req, CURLOPT_NOSIGNAL, 1);
|
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|
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@ -299,7 +366,7 @@ struct curlFileTransfer : public FileTransfer
|
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if (settings.downloadSpeed.get() > 0)
|
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curl_easy_setopt(req, CURLOPT_MAX_RECV_SPEED_LARGE, (curl_off_t) (settings.downloadSpeed.get() * 1024));
|
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|
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if (request.head)
|
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if (noBody)
|
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curl_easy_setopt(req, CURLOPT_NOBODY, 1);
|
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|
||||
if (uploadData) {
|
||||
|
|
@ -309,13 +376,8 @@ struct curlFileTransfer : public FileTransfer
|
|||
curl_easy_setopt(req, CURLOPT_INFILESIZE_LARGE, (curl_off_t) uploadData->length());
|
||||
}
|
||||
|
||||
if (request.verifyTLS) {
|
||||
if (settings.caFile != "")
|
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curl_easy_setopt(req, CURLOPT_CAINFO, settings.caFile.get().c_str());
|
||||
} else {
|
||||
curl_easy_setopt(req, CURLOPT_SSL_VERIFYPEER, 0);
|
||||
curl_easy_setopt(req, CURLOPT_SSL_VERIFYHOST, 0);
|
||||
}
|
||||
if (settings.caFile != "")
|
||||
curl_easy_setopt(req, CURLOPT_CAINFO, settings.caFile.get().c_str());
|
||||
|
||||
curl_easy_setopt(req, CURLOPT_CONNECTTIMEOUT, fileTransferSettings.connectTimeout.get());
|
||||
|
||||
|
|
@ -330,38 +392,34 @@ struct curlFileTransfer : public FileTransfer
|
|||
if (writtenToSink)
|
||||
curl_easy_setopt(req, CURLOPT_RESUME_FROM_LARGE, writtenToSink);
|
||||
|
||||
result.data.clear();
|
||||
result.bodySize = 0;
|
||||
downloadData.clear();
|
||||
bodySize = 0;
|
||||
}
|
||||
|
||||
void finish(CURLcode code)
|
||||
{
|
||||
auto httpStatus = getHTTPStatus();
|
||||
|
||||
char * effectiveUriCStr = nullptr;
|
||||
curl_easy_getinfo(req, CURLINFO_EFFECTIVE_URL, &effectiveUriCStr);
|
||||
if (effectiveUriCStr)
|
||||
result.effectiveUri = effectiveUriCStr;
|
||||
maybeFinishSetup();
|
||||
|
||||
debug("finished %s of '%s'; curl status = %d, HTTP status = %d, body = %d bytes",
|
||||
verb(), request.uri, code, httpStatus, result.bodySize);
|
||||
verb(), uri, code, httpStatus, bodySize);
|
||||
|
||||
// this has to happen here until we can return an actual future.
|
||||
// wrapping user `callback`s instead is not possible because the
|
||||
// Callback api expects std::functions, and copying Callbacks is
|
||||
// not possible due the promises they hold.
|
||||
if (code == CURLE_OK && !dataCallback && result.data.length() > 0) {
|
||||
result.data = decompress(encoding, result.data);
|
||||
if (code == CURLE_OK && !dataCallback && downloadData.length() > 0) {
|
||||
downloadData = decompress(encoding, downloadData);
|
||||
}
|
||||
|
||||
if (writeException)
|
||||
failEx(writeException);
|
||||
if (callbackException)
|
||||
failEx(callbackException);
|
||||
|
||||
else if (code == CURLE_OK && successfulStatuses.count(httpStatus))
|
||||
{
|
||||
result.cached = httpStatus == 304;
|
||||
act.progress(result.bodySize, result.bodySize);
|
||||
done = true;
|
||||
act.progress(bodySize, bodySize);
|
||||
phase = transferComplete;
|
||||
callback(nullptr, std::move(result));
|
||||
}
|
||||
|
||||
|
|
@ -419,20 +477,20 @@ struct curlFileTransfer : public FileTransfer
|
|||
|
||||
std::optional<std::string> response;
|
||||
if (!successfulStatuses.count(httpStatus))
|
||||
response = std::move(result.data);
|
||||
response = std::move(downloadData);
|
||||
auto exc =
|
||||
code == CURLE_ABORTED_BY_CALLBACK && _isInterrupted
|
||||
? FileTransferError(Interrupted, std::move(response), "%s of '%s' was interrupted", verb(), request.uri)
|
||||
? FileTransferError(Interrupted, std::move(response), "%s of '%s' was interrupted", verb(), uri)
|
||||
: httpStatus != 0
|
||||
? FileTransferError(err,
|
||||
std::move(response),
|
||||
"unable to %s '%s': HTTP error %d (%s)%s",
|
||||
verb(), request.uri, httpStatus, statusMsg,
|
||||
verb(), uri, httpStatus, statusMsg,
|
||||
code == CURLE_OK ? "" : fmt(" (curl error: %s)", curl_easy_strerror(code)))
|
||||
: FileTransferError(err,
|
||||
std::move(response),
|
||||
"unable to %s '%s': %s (%d)",
|
||||
verb(), request.uri, curl_easy_strerror(code), code);
|
||||
verb(), uri, curl_easy_strerror(code), code);
|
||||
|
||||
/* If this is a transient error, then maybe retry the
|
||||
download after a while. If we're writing to a
|
||||
|
|
@ -556,7 +614,6 @@ struct curlFileTransfer : public FileTransfer
|
|||
assert(i != items.end());
|
||||
i->second->finish(msg->data.result);
|
||||
curl_multi_remove_handle(curlm, i->second->req);
|
||||
i->second->active = false;
|
||||
items.erase(i);
|
||||
}
|
||||
}
|
||||
|
|
@ -599,10 +656,9 @@ struct curlFileTransfer : public FileTransfer
|
|||
}
|
||||
|
||||
for (auto & item : incoming) {
|
||||
debug("starting %s of %s", item->verb(), item->request.uri);
|
||||
debug("starting %s of %s", item->verb(), item->uri);
|
||||
item->init();
|
||||
curl_multi_add_handle(curlm, item->req);
|
||||
item->active = true;
|
||||
items[item->req] = item;
|
||||
}
|
||||
}
|
||||
|
|
@ -629,9 +685,9 @@ struct curlFileTransfer : public FileTransfer
|
|||
std::shared_ptr<TransferItem> enqueueItem(std::shared_ptr<TransferItem> item)
|
||||
{
|
||||
if (item->uploadData
|
||||
&& !item->request.uri.starts_with("http://")
|
||||
&& !item->request.uri.starts_with("https://"))
|
||||
throw nix::Error("uploading to '%s' is not supported", item->request.uri);
|
||||
&& !item->uri.starts_with("http://")
|
||||
&& !item->uri.starts_with("https://"))
|
||||
throw nix::Error("uploading to '%s' is not supported", item->uri);
|
||||
|
||||
{
|
||||
auto state(state_.lock());
|
||||
|
|
@ -659,77 +715,106 @@ struct curlFileTransfer : public FileTransfer
|
|||
}
|
||||
#endif
|
||||
|
||||
std::future<FileTransferResult> enqueueDownload(const FileTransferRequest & request) override
|
||||
std::future<std::pair<FileTransferResult, std::string>>
|
||||
enqueueDownload(const std::string & uri, const Headers & headers = {}) override
|
||||
{
|
||||
return enqueueFileTransfer(request, std::nullopt);
|
||||
return enqueueFileTransfer(uri, headers, std::nullopt, false);
|
||||
}
|
||||
|
||||
std::future<FileTransferResult>
|
||||
enqueueUpload(const FileTransferRequest & request, std::string data) override
|
||||
void upload(const std::string & uri, std::string data, const Headers & headers) override
|
||||
{
|
||||
return enqueueFileTransfer(request, std::move(data));
|
||||
enqueueFileTransfer(uri, headers, std::move(data), false).get();
|
||||
}
|
||||
|
||||
std::future<FileTransferResult>
|
||||
enqueueFileTransfer(const FileTransferRequest & request, std::optional<std::string> data)
|
||||
std::future<std::pair<FileTransferResult, std::string>> enqueueFileTransfer(
|
||||
const std::string & uri,
|
||||
const Headers & headers,
|
||||
std::optional<std::string> data,
|
||||
bool noBody
|
||||
)
|
||||
{
|
||||
return enqueueFileTransfer(
|
||||
request,
|
||||
uri,
|
||||
headers,
|
||||
[](std::exception_ptr ex) {
|
||||
if (ex) {
|
||||
std::rethrow_exception(ex);
|
||||
}
|
||||
},
|
||||
{},
|
||||
std::move(data)
|
||||
std::move(data),
|
||||
noBody
|
||||
);
|
||||
}
|
||||
|
||||
std::future<FileTransferResult> enqueueFileTransfer(const FileTransferRequest & request,
|
||||
std::future<std::pair<FileTransferResult, std::string>> enqueueFileTransfer(
|
||||
const std::string & uri,
|
||||
const Headers & headers,
|
||||
std::invocable<std::exception_ptr> auto callback,
|
||||
std::function<void(TransferItem &, std::string_view data)> dataCallback,
|
||||
std::optional<std::string> data
|
||||
std::optional<std::string> data,
|
||||
bool noBody
|
||||
)
|
||||
{
|
||||
/* Ugly hack to support s3:// URIs. */
|
||||
if (request.uri.starts_with("s3://")) {
|
||||
if (uri.starts_with("s3://")) {
|
||||
// FIXME: do this on a worker thread
|
||||
return std::async(std::launch::deferred, [uri{request.uri}]() -> FileTransferResult {
|
||||
return std::async(
|
||||
std::launch::deferred,
|
||||
[uri]() -> std::pair<FileTransferResult, std::string> {
|
||||
#if ENABLE_S3
|
||||
auto [bucketName, key, params] = parseS3Uri(uri);
|
||||
auto [bucketName, key, params] = parseS3Uri(uri);
|
||||
|
||||
std::string profile = getOr(params, "profile", "");
|
||||
std::string region = getOr(params, "region", Aws::Region::US_EAST_1);
|
||||
std::string scheme = getOr(params, "scheme", "");
|
||||
std::string endpoint = getOr(params, "endpoint", "");
|
||||
std::string profile = getOr(params, "profile", "");
|
||||
std::string region = getOr(params, "region", Aws::Region::US_EAST_1);
|
||||
std::string scheme = getOr(params, "scheme", "");
|
||||
std::string endpoint = getOr(params, "endpoint", "");
|
||||
|
||||
S3Helper s3Helper(profile, region, scheme, endpoint);
|
||||
S3Helper s3Helper(profile, region, scheme, endpoint);
|
||||
|
||||
// FIXME: implement ETag
|
||||
auto s3Res = s3Helper.getObject(bucketName, key);
|
||||
FileTransferResult res;
|
||||
if (!s3Res.data)
|
||||
throw FileTransferError(NotFound, "S3 object '%s' does not exist", uri);
|
||||
res.data = std::move(*s3Res.data);
|
||||
return res;
|
||||
// FIXME: implement ETag
|
||||
auto s3Res = s3Helper.getObject(bucketName, key);
|
||||
FileTransferResult res;
|
||||
if (!s3Res.data)
|
||||
throw FileTransferError(NotFound, "S3 object '%s' does not exist", uri);
|
||||
return {res, std::move(*s3Res.data)};
|
||||
#else
|
||||
throw nix::Error("cannot download '%s' because Lix is not built with S3 support", uri);
|
||||
throw nix::Error(
|
||||
"cannot download '%s' because Lix is not built with S3 support", uri
|
||||
);
|
||||
#endif
|
||||
});
|
||||
}
|
||||
);
|
||||
}
|
||||
|
||||
return enqueueItem(std::make_shared<TransferItem>(
|
||||
*this,
|
||||
request,
|
||||
uri,
|
||||
headers,
|
||||
getCurActivity(),
|
||||
std::move(callback),
|
||||
std::move(dataCallback),
|
||||
std::move(data)
|
||||
std::move(data),
|
||||
noBody
|
||||
))
|
||||
->callback.get_future();
|
||||
}
|
||||
|
||||
box_ptr<Source> download(FileTransferRequest && request) override
|
||||
bool exists(const std::string & uri, const Headers & headers) override
|
||||
{
|
||||
try {
|
||||
enqueueFileTransfer(uri, headers, std::nullopt, true).get();
|
||||
return true;
|
||||
} catch (FileTransferError & e) {
|
||||
/* S3 buckets return 403 if a file doesn't exist and the
|
||||
bucket is unlistable, so treat 403 as 404. */
|
||||
if (e.error == FileTransfer::NotFound || e.error == FileTransfer::Forbidden)
|
||||
return false;
|
||||
throw;
|
||||
}
|
||||
}
|
||||
|
||||
box_ptr<Source> download(const std::string & uri, const Headers & headers) override
|
||||
{
|
||||
struct State {
|
||||
bool done = false, failed = false;
|
||||
|
|
@ -741,7 +826,8 @@ struct curlFileTransfer : public FileTransfer
|
|||
auto _state = std::make_shared<Sync<State>>();
|
||||
|
||||
enqueueFileTransfer(
|
||||
request,
|
||||
uri,
|
||||
headers,
|
||||
[_state](std::exception_ptr ex) {
|
||||
auto state(_state->lock());
|
||||
state->done = true;
|
||||
|
|
@ -776,7 +862,8 @@ struct curlFileTransfer : public FileTransfer
|
|||
state->data.append(data);
|
||||
state->avail.notify_one();
|
||||
},
|
||||
std::nullopt
|
||||
std::nullopt,
|
||||
false
|
||||
);
|
||||
|
||||
struct InnerSource : Source
|
||||
|
|
|
|||
|
|
@ -52,25 +52,11 @@ struct FileTransferSettings : Config
|
|||
|
||||
extern FileTransferSettings fileTransferSettings;
|
||||
|
||||
struct FileTransferRequest
|
||||
{
|
||||
std::string uri;
|
||||
Headers headers;
|
||||
std::string expectedETag;
|
||||
bool verifyTLS = true;
|
||||
bool head = false;
|
||||
|
||||
FileTransferRequest(std::string_view uri)
|
||||
: uri(uri) { }
|
||||
};
|
||||
|
||||
struct FileTransferResult
|
||||
{
|
||||
bool cached = false;
|
||||
std::string etag;
|
||||
std::string effectiveUri;
|
||||
std::string data;
|
||||
uint64_t bodySize = 0;
|
||||
/* An "immutable" URL for this resource (i.e. one whose contents
|
||||
will never change), as returned by the `Link: <url>;
|
||||
rel="immutable"` header. */
|
||||
|
|
@ -87,14 +73,26 @@ struct FileTransfer
|
|||
* Enqueues a download request, returning a future for the result of
|
||||
* the download. The future may throw a FileTransferError exception.
|
||||
*/
|
||||
virtual std::future<FileTransferResult> enqueueDownload(const FileTransferRequest & request) = 0;
|
||||
virtual std::future<std::pair<FileTransferResult, std::string>>
|
||||
enqueueDownload(const std::string & uri, const Headers & headers = {}) = 0;
|
||||
|
||||
/**
|
||||
* Enqueue an upload request, returning a future for the result of
|
||||
* the upload. The future may throw a FileTransferError exception.
|
||||
* Upload some data. May throw a FileTransferError exception.
|
||||
*/
|
||||
virtual std::future<FileTransferResult>
|
||||
enqueueUpload(const FileTransferRequest & request, std::string data) = 0;
|
||||
virtual void
|
||||
upload(const std::string & uri, std::string data, const Headers & headers = {}) = 0;
|
||||
|
||||
/**
|
||||
* Checks whether the given URI exists. For historical reasons this function
|
||||
* treats HTTP 403 responses like HTTP 404 responses and returns `false` for
|
||||
* both. This was originally done to handle unlistable S3 buckets, which may
|
||||
* return 403 (not 404) if the reuqested object doesn't exist in the bucket.
|
||||
*
|
||||
* ## Bugs
|
||||
*
|
||||
* S3 objects are downloaded completely to answer this request.
|
||||
*/
|
||||
virtual bool exists(const std::string & uri, const Headers & headers = {}) = 0;
|
||||
|
||||
/**
|
||||
* Download a file, returning its contents through a source. Will not return
|
||||
|
|
@ -103,7 +101,7 @@ struct FileTransfer
|
|||
* thrown by the returned source. The source will only throw errors detected
|
||||
* during the transfer itself (decompression errors, connection drops, etc).
|
||||
*/
|
||||
virtual box_ptr<Source> download(FileTransferRequest && request) = 0;
|
||||
virtual box_ptr<Source> download(const std::string & uri, const Headers & headers = {}) = 0;
|
||||
|
||||
enum Error { NotFound, Forbidden, Misc, Transient, Interrupted };
|
||||
};
|
||||
|
|
|
|||
|
|
@ -114,15 +114,8 @@ protected:
|
|||
checkEnabled();
|
||||
|
||||
try {
|
||||
FileTransferRequest request{makeURI(path)};
|
||||
request.head = true;
|
||||
getFileTransfer()->enqueueDownload(request).get();
|
||||
return true;
|
||||
return getFileTransfer()->exists(makeURI(path));
|
||||
} catch (FileTransferError & e) {
|
||||
/* S3 buckets return 403 if a file doesn't exist and the
|
||||
bucket is unlistable, so treat 403 as 404. */
|
||||
if (e.error == FileTransfer::NotFound || e.error == FileTransfer::Forbidden)
|
||||
return false;
|
||||
maybeDisable();
|
||||
throw;
|
||||
}
|
||||
|
|
@ -132,13 +125,13 @@ protected:
|
|||
std::shared_ptr<std::basic_iostream<char>> istream,
|
||||
const std::string & mimeType) override
|
||||
{
|
||||
FileTransferRequest req{makeURI(path)};
|
||||
auto data = StreamToSourceAdapter(istream).drain();
|
||||
req.headers = {{"Content-Type", mimeType}};
|
||||
try {
|
||||
getFileTransfer()->enqueueUpload(req, std::move(data)).get();
|
||||
getFileTransfer()->upload(makeURI(path), std::move(data), {{"Content-Type", mimeType}});
|
||||
} catch (FileTransferError & e) {
|
||||
throw UploadToHTTP("while uploading to HTTP binary cache at '%s': %s", cacheUri, e.msg());
|
||||
throw UploadToHTTP(
|
||||
"while uploading to HTTP binary cache at '%s': %s", cacheUri, e.msg()
|
||||
);
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -153,9 +146,8 @@ protected:
|
|||
box_ptr<Source> getFile(const std::string & path) override
|
||||
{
|
||||
checkEnabled();
|
||||
FileTransferRequest request{makeURI(path)};
|
||||
try {
|
||||
return getFileTransfer()->download(std::move(request));
|
||||
return getFileTransfer()->download(makeURI(path));
|
||||
} catch (FileTransferError & e) {
|
||||
if (e.error == FileTransfer::NotFound || e.error == FileTransfer::Forbidden)
|
||||
throw NoSuchBinaryCacheFile("file '%s' does not exist in binary cache '%s'", path, getUri());
|
||||
|
|
@ -168,10 +160,8 @@ protected:
|
|||
{
|
||||
checkEnabled();
|
||||
|
||||
FileTransferRequest request{makeURI(path)};
|
||||
|
||||
try {
|
||||
return std::move(getFileTransfer()->enqueueDownload(request).get().data);
|
||||
return std::move(getFileTransfer()->enqueueDownload(makeURI(path)).get().second);
|
||||
} catch (FileTransferError & e) {
|
||||
if (e.error == FileTransfer::NotFound || e.error == FileTransfer::Forbidden)
|
||||
return {};
|
||||
|
|
|
|||
|
|
@ -48,7 +48,7 @@ std::string resolveMirrorUrl(EvalState & state, const std::string & url)
|
|||
|
||||
std::tuple<StorePath, Hash> prefetchFile(
|
||||
ref<Store> store,
|
||||
std::string_view url,
|
||||
const std::string & url,
|
||||
std::optional<std::string> name,
|
||||
HashType hashType,
|
||||
std::optional<Hash> expectedHash,
|
||||
|
|
@ -98,8 +98,7 @@ std::tuple<StorePath, Hash> prefetchFile(
|
|||
|
||||
FdSink sink(fd.get());
|
||||
|
||||
FileTransferRequest req(url);
|
||||
getFileTransfer()->download(std::move(req))->drainInto(sink);
|
||||
getFileTransfer()->download(url)->drainInto(sink);
|
||||
}
|
||||
|
||||
/* Optionally unpack the file. */
|
||||
|
|
|
|||
|
|
@ -285,12 +285,11 @@ struct CmdUpgradeNix : MixDryRun, EvalCommand
|
|||
Activity act(*logger, lvlInfo, actUnknown, "querying latest Nix version");
|
||||
|
||||
// FIXME: use nixos.org?
|
||||
auto req = FileTransferRequest(storePathsUrl);
|
||||
auto res = getFileTransfer()->enqueueDownload(req).get();
|
||||
auto [res, data] = getFileTransfer()->enqueueDownload(storePathsUrl).get();
|
||||
|
||||
auto state = std::make_unique<EvalState>(SearchPath{}, store);
|
||||
auto v = state->allocValue();
|
||||
state->eval(state->parseExprFromString(res.data, state->rootPath(CanonPath("/no-such-path"))), *v);
|
||||
state->eval(state->parseExprFromString(data, state->rootPath(CanonPath("/no-such-path"))), *v);
|
||||
Bindings & bindings(*state->allocBindings(0));
|
||||
auto v2 = findAlongAttrPath(*state, settings.thisSystem, bindings, *v).first;
|
||||
|
||||
|
|
|
|||
|
|
@ -136,7 +136,7 @@ TEST(FileTransfer, exceptionAbortsDownload)
|
|||
|
||||
LambdaSink broken([](auto block) { throw Done(); });
|
||||
|
||||
ASSERT_THROW(ft->download(FileTransferRequest("file:///dev/zero"))->drainInto(broken), Done);
|
||||
ASSERT_THROW(ft->download("file:///dev/zero")->drainInto(broken), Done);
|
||||
|
||||
// makeFileTransfer returns a ref<>, which cannot be cleared. since we also
|
||||
// can't default-construct it we'll have to overwrite it instead, but we'll
|
||||
|
|
@ -155,7 +155,7 @@ TEST(FileTransfer, exceptionAbortsRead)
|
|||
auto [port, srv] = serveHTTP("200 ok", "content-length: 0\r\n", [] { return ""; });
|
||||
auto ft = makeFileTransfer();
|
||||
char buf[10] = "";
|
||||
ASSERT_THROW(ft->download(FileTransferRequest(fmt("http://[::1]:%d/index", port)))->read(buf, 10), EndOfFile);
|
||||
ASSERT_THROW(ft->download(fmt("http://[::1]:%d/index", port))->read(buf, 10), EndOfFile);
|
||||
}
|
||||
|
||||
TEST(FileTransfer, NOT_ON_DARWIN(reportsSetupErrors))
|
||||
|
|
@ -163,7 +163,7 @@ TEST(FileTransfer, NOT_ON_DARWIN(reportsSetupErrors))
|
|||
auto [port, srv] = serveHTTP("404 not found", "", [] { return ""; });
|
||||
auto ft = makeFileTransfer();
|
||||
ASSERT_THROW(
|
||||
ft->enqueueDownload(FileTransferRequest(fmt("http://[::1]:%d/index", port))).get(),
|
||||
ft->enqueueDownload(fmt("http://[::1]:%d/index", port)).get(),
|
||||
FileTransferError
|
||||
);
|
||||
}
|
||||
|
|
@ -179,8 +179,7 @@ TEST(FileTransfer, NOT_ON_DARWIN(defersFailures))
|
|||
return std::string(1024 * 1024, ' ');
|
||||
});
|
||||
auto ft = makeFileTransfer(0);
|
||||
FileTransferRequest req(fmt("http://[::1]:%d/index", port));
|
||||
auto src = ft->download(std::move(req));
|
||||
auto src = ft->download(fmt("http://[::1]:%d/index", port));
|
||||
ASSERT_THROW(src->drain(), FileTransferError);
|
||||
}
|
||||
|
||||
|
|
@ -193,7 +192,7 @@ TEST(FileTransfer, NOT_ON_DARWIN(handlesContentEncoding))
|
|||
auto ft = makeFileTransfer();
|
||||
|
||||
StringSink sink;
|
||||
ft->download(FileTransferRequest(fmt("http://[::1]:%d/index", port)))->drainInto(sink);
|
||||
ft->download(fmt("http://[::1]:%d/index", port))->drainInto(sink);
|
||||
EXPECT_EQ(sink.s, original);
|
||||
}
|
||||
|
||||
|
|
@ -216,8 +215,7 @@ TEST(FileTransfer, usesIntermediateLinkHeaders)
|
|||
{"200 ok", "content-length: 1\r\n", [] { return "a"; }},
|
||||
});
|
||||
auto ft = makeFileTransfer(0);
|
||||
FileTransferRequest req(fmt("http://[::1]:%d/first", port));
|
||||
auto result = ft->enqueueDownload(req).get();
|
||||
auto [result, _data] = ft->enqueueDownload(fmt("http://[::1]:%d/first", port)).get();
|
||||
ASSERT_EQ(result.immutableUrl, "http://foo");
|
||||
}
|
||||
|
||||
|
|
|
|||
Loading…
Reference in a new issue