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85 lines
3.2 KiB
C++
85 lines
3.2 KiB
C++
// Copyright (c) 2011 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef NET_FTP_FTP_TRANSACTION_H_
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#define NET_FTP_FTP_TRANSACTION_H_
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#include <stdint.h>
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#include "net/base/completion_callback.h"
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#include "net/base/io_buffer.h"
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#include "net/base/load_states.h"
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#include "net/base/net_export.h"
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#include "net/traffic_annotation/network_traffic_annotation.h"
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namespace net {
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class AuthCredentials;
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class FtpResponseInfo;
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class FtpRequestInfo;
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class NetLogWithSource;
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// Represents a single FTP transaction.
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class NET_EXPORT_PRIVATE FtpTransaction {
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public:
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// Stops any pending IO and destroys the transaction object.
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virtual ~FtpTransaction() {}
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// Starts the FTP transaction (i.e., sends the FTP request).
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//
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// Returns OK if the transaction could be started synchronously, which means
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// that the request was served from the cache (only supported for directory
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// listings). ERR_IO_PENDING is returned to indicate that the
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// CompletionCallback will be notified once response info is available or if
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// an IO error occurs. Any other return value indicates that the transaction
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// could not be started.
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//
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// Regardless of the return value, the caller is expected to keep the
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// request_info object alive until Destroy is called on the transaction.
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//
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// NOTE: The transaction is not responsible for deleting the callback object.
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//
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// Profiling information for the request is saved to |net_log| if non-NULL.
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virtual int Start(const FtpRequestInfo* request_info,
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const CompletionCallback& callback,
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const NetLogWithSource& net_log,
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const NetworkTrafficAnnotationTag& traffic_annotation) = 0;
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// Restarts the FTP transaction with authentication credentials.
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virtual int RestartWithAuth(const AuthCredentials& credentials,
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const CompletionCallback& callback) = 0;
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// Once response info is available for the transaction, response data may be
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// read by calling this method.
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//
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// Response data is copied into the given buffer and the number of bytes
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// copied is returned. ERR_IO_PENDING is returned if response data is not
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// yet available. The CompletionCallback is notified when the data copy
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// completes, and it is passed the number of bytes that were successfully
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// copied. Or, if a read error occurs, the CompletionCallback is notified of
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// the error. Any other negative return value indicates that the transaction
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// could not be read.
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//
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// NOTE: The transaction is not responsible for deleting the callback object.
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//
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virtual int Read(IOBuffer* buf,
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int buf_len,
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const CompletionCallback& callback) = 0;
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// Returns the response info for this transaction or NULL if the response
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// info is not available.
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virtual const FtpResponseInfo* GetResponseInfo() const = 0;
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// Returns the load state for this transaction.
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virtual LoadState GetLoadState() const = 0;
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// Returns the upload progress in bytes. If there is no upload data,
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// zero will be returned.
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virtual uint64_t GetUploadProgress() const = 0;
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};
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} // namespace net
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#endif // NET_FTP_FTP_TRANSACTION_H_
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