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/*
* HTTP.h
* ------
* Purpose: Simple HTTP client interface.
* Notes : (currently none)
* Authors: OpenMPT Devs
* The OpenMPT source code is released under the BSD license. Read LICENSE for more details.
*/
#pragma once
#include "openmpt/all/BuildSettings.hpp"
#include <functional>
#include <iosfwd>
#include <optional>
OPENMPT_NAMESPACE_BEGIN
struct URI
{
mpt::ustring scheme;
mpt::ustring username;
mpt::ustring password;
mpt::ustring host;
mpt::ustring port;
mpt::ustring path;
mpt::ustring query;
mpt::ustring fragment;
};
class bad_uri
: public std::runtime_error
{
public:
bad_uri(const std::string &msg)
: std::runtime_error(msg)
{
}
};
URI ParseURI(mpt::ustring str);
namespace HTTP
{
class exception
: public std::runtime_error
{
private:
mpt::ustring message;
public:
exception(const mpt::ustring &m);
mpt::ustring GetMessage() const;
};
class status_exception
: public std::runtime_error
{
public:
status_exception(uint64 status)
: std::runtime_error(MPT_AFORMAT("HTTP status {}")(status))
{
return;
}
};
class Abort
: public exception
{
public:
Abort() :
exception(U_("Operation aborted."))
{
return;
}
};
struct NativeHandle;
class Handle
{
private:
std::unique_ptr<NativeHandle> handle;
public:
Handle();
Handle(const Handle &) = delete;
Handle & operator=(const Handle &) = delete;
explicit operator bool() const;
bool operator!() const;
Handle(NativeHandle h);
Handle & operator=(NativeHandle h);
operator NativeHandle ();
~Handle();
};
class InternetSession
{
private:
Handle internet;
public:
InternetSession(mpt::ustring userAgent);
operator NativeHandle ();
template <typename TRequest>
auto operator()(const TRequest &request) -> decltype(request(*this))
{
return request(*this);
}
template <typename TRequest>
auto Request(const TRequest &request) -> decltype(request(*this))
{
return request(*this);
}
};
enum class Protocol
{
HTTP,
HTTPS,
};
enum class Port : uint16
{
Default = 0,
HTTP = 80,
HTTPS = 443,
};
enum class Method
{
Get,
Head,
Post,
Put,
Delete,
Trace,
Options,
Connect,
Patch,
};
using Query = std::vector<std::pair<mpt::ustring, mpt::ustring>>;
namespace MimeType {
inline std::string Text() { return "text/plain"; }
inline std::string JSON() { return "application/json"; }
inline std::string Binary() { return "application/octet-stream"; }
}
using AcceptMimeTypes = std::vector<std::string>;
namespace MimeTypes {
inline AcceptMimeTypes Text() { return {"text/*"}; }
inline AcceptMimeTypes JSON() { return {MimeType::JSON()}; }
inline AcceptMimeTypes Binary() { return {MimeType::Binary()}; }
}
using Headers = std::vector<std::pair<std::string, std::string>>;
enum Flags
{
None = 0x00u,
NoCache = 0x01u,
AutoRedirect = 0x02u,
};
struct Result
{
uint64 Status = 0;
std::optional<uint64> ContentLength;
std::vector<std::byte> Data;
void CheckStatus(uint64 expected) const
{
if(Status != expected)
{
throw status_exception(Status);
}
}
};
enum class Progress
{
Start = 1,
ConnectionEstablished = 2,
RequestOpened = 3,
RequestSent = 4,
ResponseReceived = 5,
TransferBegin = 6,
TransferRunning = 7,
TransferDone = 8,
};
struct Request
{
Protocol protocol = Protocol::HTTPS;
mpt::ustring host;
Port port = Port::Default;
mpt::ustring username;
mpt::ustring password;
Method method = Method::Get;
mpt::ustring path = U_("/");
Query query;
mpt::ustring referrer;
AcceptMimeTypes acceptMimeTypes;
Flags flags = None;
Headers headers;
std::string dataMimeType;
mpt::const_byte_span data;
std::ostream *outputStream = nullptr;
std::function<void(Progress, uint64, std::optional<uint64>)> progressCallback = nullptr;
Request &SetURI(const URI &uri);
#if defined(MPT_BUILD_RETRO)
Request &InsecureTLSDowngradeWindowsXP();
#endif // MPT_BUILD_RETRO
Result operator()(InternetSession &internet) const;
private:
void progress(Progress progress, uint64 transferred, std::optional<uint64> expectedSize) const;
};
Result SimpleGet(InternetSession &internet, Protocol protocol, const mpt::ustring &host, const mpt::ustring &path);
} // namespace HTTP
OPENMPT_NAMESPACE_END
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