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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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