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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 | |
| 6 #ifndef NET_FTP_FTP_CTRL_RESPONSE_BUFFER_H_ | |
| 7 #define NET_FTP_FTP_CTRL_RESPONSE_BUFFER_H_ | |
| 8 | |
| 9 #include <queue> | |
| 10 #include <string> | |
| 11 #include <vector> | |
| 12 | |
| 13 #include "base/basictypes.h" | |
| 14 #include "net/base/net_export.h" | |
| 15 #include "net/base/net_log.h" | |
| 16 | |
| 17 namespace net { | |
| 18 | |
| 19 struct NET_EXPORT_PRIVATE FtpCtrlResponse { | |
| 20 static const int kInvalidStatusCode; | |
| 21 | |
| 22 FtpCtrlResponse(); | |
| 23 ~FtpCtrlResponse(); | |
| 24 | |
| 25 int status_code; // Three-digit status code. | |
| 26 std::vector<std::string> lines; // Response lines, without CRLFs. | |
| 27 }; | |
| 28 | |
| 29 class NET_EXPORT_PRIVATE FtpCtrlResponseBuffer { | |
| 30 public: | |
| 31 FtpCtrlResponseBuffer(const BoundNetLog& net_log); | |
| 32 ~FtpCtrlResponseBuffer(); | |
| 33 | |
| 34 // Called when data is received from the control socket. Returns error code. | |
| 35 int ConsumeData(const char* data, int data_length); | |
| 36 | |
| 37 bool ResponseAvailable() const { | |
| 38 return !responses_.empty(); | |
| 39 } | |
| 40 | |
| 41 // Returns the next response. It is an error to call this function | |
| 42 // unless ResponseAvailable returns true. | |
| 43 FtpCtrlResponse PopResponse(); | |
| 44 | |
| 45 private: | |
| 46 struct ParsedLine { | |
| 47 ParsedLine(); | |
| 48 | |
| 49 // Indicates that this line begins with a valid 3-digit status code. | |
| 50 bool has_status_code; | |
| 51 | |
| 52 // Indicates that this line has the dash (-) after the code, which | |
| 53 // means a multiline response. | |
| 54 bool is_multiline; | |
| 55 | |
| 56 // Indicates that this line could be parsed as a complete and valid | |
| 57 // response line, without taking into account preceding lines (which | |
| 58 // may change its meaning into a continuation of the previous line). | |
| 59 bool is_complete; | |
| 60 | |
| 61 // Part of response parsed as status code. | |
| 62 int status_code; | |
| 63 | |
| 64 // Part of response parsed as status text. | |
| 65 std::string status_text; | |
| 66 | |
| 67 // Text before parsing, without terminating CRLF. | |
| 68 std::string raw_text; | |
| 69 }; | |
| 70 | |
| 71 static ParsedLine ParseLine(const std::string& line); | |
| 72 | |
| 73 void ExtractFullLinesFromBuffer(); | |
| 74 | |
| 75 // We keep not-yet-parsed data in a string buffer. | |
| 76 std::string buffer_; | |
| 77 | |
| 78 std::queue<ParsedLine> lines_; | |
| 79 | |
| 80 // True if we are in the middle of parsing a multi-line response. | |
| 81 bool multiline_; | |
| 82 | |
| 83 // When parsing a multiline response, we don't know beforehand if a line | |
| 84 // will have a continuation. So always store last line of multiline response | |
| 85 // so we can append the continuation to it. | |
| 86 std::string line_buf_; | |
| 87 | |
| 88 // Keep the response data while we add all lines to it. | |
| 89 FtpCtrlResponse response_buf_; | |
| 90 | |
| 91 // As we read full responses (possibly multiline), we add them to the queue. | |
| 92 std::queue<FtpCtrlResponse> responses_; | |
| 93 | |
| 94 BoundNetLog net_log_; | |
| 95 | |
| 96 DISALLOW_COPY_AND_ASSIGN(FtpCtrlResponseBuffer); | |
| 97 }; | |
| 98 | |
| 99 } // namespace net | |
| 100 | |
| 101 #endif // NET_FTP_FTP_CTRL_RESPONSE_BUFFER_H_ | |
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