Beginnings of our own FTP LIST parsing code.

net/ftp/ftp_directory_listing_buffer.h

+// Copyright (c) 2009 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_DIRECTORY_LISTING_BUFFER_H_
+#define NET_FTP_FTP_DIRECTORY_LISTING_BUFFER_H_
+
+#include <deque>
+#include <set>
+#include <string>
+
+#include "base/basictypes.h"
+#include "base/string16.h"
+#include "base/time.h"
+
+namespace net {
+  
+struct FtpDirectoryListingEntry;
+class FtpDirectoryListingParser;
+  
+class FtpDirectoryListingBuffer {
+ public:
+  FtpDirectoryListingBuffer();
+  
+  ~FtpDirectoryListingBuffer();
+
+  // Called when data is received from the data socket. Returns network
+  // error code.
+  int ConsumeData(const char* data, int data_length);
+
+  // Called when all received data has been consumed by this buffer. Tells the
+  // buffer to try to parse remaining raw data and returns network error code.
+  int ProcessRemainingData();
+
+  bool EntryAvailable() const;
+
+  // Returns the next entry. It is an error to call this function
+  // unless EntryAvailable returns true.
+  FtpDirectoryListingEntry PopEntry();
+
+ private:
+  typedef std::set<FtpDirectoryListingParser*> ParserSet;
+  
+  // Converts the string |from| to detected encoding and stores it in |to|.
+  // Returns true on success.
+  bool ConvertToDetectedEncoding(const std::string& from, string16* to);
+
+  // Tries to extract full lines from the raw buffer, converting them to the
+  // detected encoding. Returns network error code.
+  int ExtractFullLinesFromBuffer();
+
+  // Tries to parse full lines stored in |lines_|. Returns network error code.
+  int ParseLines();
+
+  // Detected encoding of the response (empty if unknown or ASCII).
+  std::string encoding_;
+
+  // Buffer to keep not-yet-split data.
+  std::string buffer_;
+
+  // CRLF-delimited lines, without the CRLF, not yet consumed by parser.
+  std::deque<string16> lines_;
+  
+  // A collection of parsers for different listing styles. The parsers are owned
+  // by this FtpDirectoryListingBuffer.
+  ParserSet parsers_;
+  
+  // When we're sure about the listing format, its parser is stored in
+  // |current_parser_|.
+  FtpDirectoryListingParser* current_parser_;
+
+  DISALLOW_COPY_AND_ASSIGN(FtpDirectoryListingBuffer);
+};
+
+}  // namespace net
+
+#endif  // NET_FTP_FTP_DIRECTORY_LISTING_BUFFER_H_