135 lines
3.8 KiB
C++
135 lines
3.8 KiB
C++
#pragma once
|
||
|
||
#include "types.hh"
|
||
#include "hash.hh"
|
||
#include "config.hh"
|
||
|
||
#include <string>
|
||
#include <future>
|
||
|
||
namespace nix {
|
||
|
||
struct FileTransferSettings : Config
|
||
{
|
||
Setting<bool> enableHttp2{this, true, "http2",
|
||
"Whether to enable HTTP/2 support."};
|
||
|
||
Setting<std::string> userAgentSuffix{this, "", "user-agent-suffix",
|
||
"String appended to the user agent in HTTP requests."};
|
||
|
||
Setting<size_t> httpConnections{
|
||
this, 25, "http-connections",
|
||
R"(
|
||
The maximum number of parallel TCP connections used to fetch
|
||
files from binary caches and by other downloads. It defaults
|
||
to 25. 0 means no limit.
|
||
)",
|
||
{"binary-caches-parallel-connections"}};
|
||
|
||
Setting<unsigned long> connectTimeout{
|
||
this, 0, "connect-timeout",
|
||
R"(
|
||
The timeout (in seconds) for establishing connections in the
|
||
binary cache substituter. It corresponds to `curl`’s
|
||
`--connect-timeout` option.
|
||
)"};
|
||
|
||
Setting<unsigned long> stalledDownloadTimeout{
|
||
this, 300, "stalled-download-timeout",
|
||
R"(
|
||
The timeout (in seconds) for receiving data from servers
|
||
during download. Nix cancels idle downloads after this
|
||
timeout's duration.
|
||
)"};
|
||
|
||
Setting<unsigned int> tries{this, 5, "download-attempts",
|
||
"How often Nix will attempt to download a file before giving up."};
|
||
};
|
||
|
||
extern FileTransferSettings fileTransferSettings;
|
||
|
||
struct FileTransferRequest
|
||
{
|
||
std::string uri;
|
||
std::string expectedETag;
|
||
bool verifyTLS = true;
|
||
bool head = false;
|
||
size_t tries = fileTransferSettings.tries;
|
||
unsigned int baseRetryTimeMs = 250;
|
||
ActivityId parentAct;
|
||
bool decompress = true;
|
||
std::shared_ptr<std::string> data;
|
||
std::string mimeType;
|
||
std::function<void(char *, size_t)> dataCallback;
|
||
|
||
FileTransferRequest(const std::string & uri)
|
||
: uri(uri), parentAct(getCurActivity()) { }
|
||
|
||
std::string verb()
|
||
{
|
||
return data ? "upload" : "download";
|
||
}
|
||
};
|
||
|
||
struct FileTransferResult
|
||
{
|
||
bool cached = false;
|
||
std::string etag;
|
||
std::string effectiveUri;
|
||
std::shared_ptr<std::string> data;
|
||
uint64_t bodySize = 0;
|
||
};
|
||
|
||
class Store;
|
||
|
||
struct FileTransfer
|
||
{
|
||
virtual ~FileTransfer() { }
|
||
|
||
/* Enqueue a data transfer request, returning a future to the result of
|
||
the download. The future may throw a FileTransferError
|
||
exception. */
|
||
virtual void enqueueFileTransfer(const FileTransferRequest & request,
|
||
Callback<FileTransferResult> callback) = 0;
|
||
|
||
std::future<FileTransferResult> enqueueFileTransfer(const FileTransferRequest & request);
|
||
|
||
/* Synchronously download a file. */
|
||
FileTransferResult download(const FileTransferRequest & request);
|
||
|
||
/* Synchronously upload a file. */
|
||
FileTransferResult upload(const FileTransferRequest & request);
|
||
|
||
/* Download a file, writing its data to a sink. The sink will be
|
||
invoked on the thread of the caller. */
|
||
void download(FileTransferRequest && request, Sink & sink);
|
||
|
||
enum Error { NotFound, Forbidden, Misc, Transient, Interrupted };
|
||
};
|
||
|
||
/* Return a shared FileTransfer object. Using this object is preferred
|
||
because it enables connection reuse and HTTP/2 multiplexing. */
|
||
ref<FileTransfer> getFileTransfer();
|
||
|
||
/* Return a new FileTransfer object. */
|
||
ref<FileTransfer> makeFileTransfer();
|
||
|
||
class FileTransferError : public Error
|
||
{
|
||
public:
|
||
FileTransfer::Error error;
|
||
std::shared_ptr<string> response; // intentionally optional
|
||
|
||
template<typename... Args>
|
||
FileTransferError(FileTransfer::Error error, std::shared_ptr<string> response, const Args & ... args);
|
||
|
||
virtual const char* sname() const override { return "FileTransferError"; }
|
||
};
|
||
|
||
bool isUri(const string & s);
|
||
|
||
/* Resolve deprecated 'channel:<foo>' URLs. */
|
||
std::string resolveUri(const std::string & uri);
|
||
|
||
}
|