50 lines
1.7 KiB
C++
50 lines
1.7 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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///
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/// \file
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/// An HTTPResponseHandler that streams the response body to a CachedFileStream.
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///
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_HTTP_STREAMEDHTTPRESPONSEHANDLER_H
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#define LLVM_HTTP_STREAMEDHTTPRESPONSEHANDLER_H
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#include "llvm/HTTP/HTTPClient.h"
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#include "llvm/Support/Caching.h"
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#include "llvm/Support/Error.h"
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#include <functional>
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#include <memory>
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namespace llvm {
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/// A handler which streams the returned data to a CachedFileStream. The cache
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/// file is only created if a 200 OK status is observed.
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class StreamedHTTPResponseHandler : public HTTPResponseHandler {
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using CreateStreamFn =
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std::function<Expected<std::unique_ptr<CachedFileStream>>()>;
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CreateStreamFn CreateStream;
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HTTPClient &Client;
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std::unique_ptr<CachedFileStream> FileStream;
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public:
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StreamedHTTPResponseHandler(CreateStreamFn CreateStream, HTTPClient &Client)
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: CreateStream(std::move(CreateStream)), Client(Client) {}
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/// Must be called exactly once after the writes have been completed
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/// but before the StreamedHTTPResponseHandler object is destroyed.
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Error commit();
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virtual ~StreamedHTTPResponseHandler() = default;
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Error handleBodyChunk(StringRef BodyChunk) override;
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};
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} // end namespace llvm
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#endif // LLVM_HTTP_STREAMEDHTTPRESPONSEHANDLER_H
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