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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef NET_FTP_FTP_CTRL_RESPONSE_BUFFER_H_
#define NET_FTP_FTP_CTRL_RESPONSE_BUFFER_H_
#include <queue>
#include <string>
#include <vector>
#include "base/basictypes.h"
#include "net/base/net_export.h"
#include "net/base/net_log.h"
namespace net {
struct NET_EXPORT_PRIVATE FtpCtrlResponse {
static const int kInvalidStatusCode;
FtpCtrlResponse();
~FtpCtrlResponse();
int status_code; // Three-digit status code.
std::vector<std::string> lines; // Response lines, without CRLFs.
};
class NET_EXPORT_PRIVATE FtpCtrlResponseBuffer {
public:
FtpCtrlResponseBuffer(const BoundNetLog& net_log);
~FtpCtrlResponseBuffer();
// Called when data is received from the control socket. Returns error code.
int ConsumeData(const char* data, int data_length);
bool ResponseAvailable() const {
return !responses_.empty();
}
// Returns the next response. It is an error to call this function
// unless ResponseAvailable returns true.
FtpCtrlResponse PopResponse();
private:
struct ParsedLine {
ParsedLine();
// Indicates that this line begins with a valid 3-digit status code.
bool has_status_code;
// Indicates that this line has the dash (-) after the code, which
// means a multiline response.
bool is_multiline;
// Indicates that this line could be parsed as a complete and valid
// response line, without taking into account preceding lines (which
// may change its meaning into a continuation of the previous line).
bool is_complete;
// Part of response parsed as status code.
int status_code;
// Part of response parsed as status text.
std::string status_text;
// Text before parsing, without terminating CRLF.
std::string raw_text;
};
static ParsedLine ParseLine(const std::string& line);
void ExtractFullLinesFromBuffer();
// We keep not-yet-parsed data in a string buffer.
std::string buffer_;
std::queue<ParsedLine> lines_;
// True if we are in the middle of parsing a multi-line response.
bool multiline_;
// When parsing a multiline response, we don't know beforehand if a line
// will have a continuation. So always store last line of multiline response
// so we can append the continuation to it.
std::string line_buf_;
// Keep the response data while we add all lines to it.
FtpCtrlResponse response_buf_;
// As we read full responses (possibly multiline), we add them to the queue.
std::queue<FtpCtrlResponse> responses_;
BoundNetLog net_log_;
DISALLOW_COPY_AND_ASSIGN(FtpCtrlResponseBuffer);
};
} // namespace net
#endif // NET_FTP_FTP_CTRL_RESPONSE_BUFFER_H_
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