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1 // Copyright (c) 2006, Google Inc.
2 // All rights reserved.
3 //
4 // Redistribution and use in source and binary forms, with or without
5 // modification, are permitted provided that the following conditions are
6 // met:
7 //
8 //     * Redistributions of source code must retain the above copyright
9 // notice, this list of conditions and the following disclaimer.
10 //     * Redistributions in binary form must reproduce the above
11 // copyright notice, this list of conditions and the following disclaimer
12 // in the documentation and/or other materials provided with the
13 // distribution.
14 //     * Neither the name of Google Inc. nor the names of its
15 // contributors may be used to endorse or promote products derived from
16 // this software without specific prior written permission.
17 //
18 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 
30 #ifndef CLIENT_WINDOWS_SENDER_CRASH_REPORT_SENDER_H__
31 #define CLIENT_WINDOWS_SENDER_CRASH_REPORT_SENDER_H__
32 
33 // CrashReportSender is a "static" class which provides an API to upload
34 // crash reports via HTTP(S).  A crash report is formatted as a multipart POST
35 // request, which contains a set of caller-supplied string key/value pairs,
36 // and a minidump file to upload.
37 //
38 // To use this library in your project, you will need to link against
39 // wininet.lib.
40 
41 #pragma warning( push )
42 // Disable exception handler warnings.
43 #pragma warning( disable : 4530 )
44 
45 #include <map>
46 #include <string>
47 
48 namespace google_breakpad {
49 
50 using std::wstring;
51 using std::map;
52 
53 typedef enum {
54   RESULT_FAILED = 0,  // Failed to communicate with the server; try later.
55   RESULT_REJECTED,    // Successfully sent the crash report, but the
56                       // server rejected it; don't resend this report.
57   RESULT_SUCCEEDED,   // The server accepted the crash report.
58   RESULT_THROTTLED    // No attempt was made to send the crash report, because
59                       // we exceeded the maximum reports per day.
60 } ReportResult;
61 
62 class CrashReportSender {
63  public:
64   // Initializes a CrashReportSender instance.
65   // If checkpoint_file is non-empty, breakpad will persist crash report
66   // state to this file.  A checkpoint file is required for
67   // set_max_reports_per_day() to function properly.
68   explicit CrashReportSender(const wstring &checkpoint_file);
~CrashReportSender()69   ~CrashReportSender() {}
70 
71   // Sets the maximum number of crash reports that will be sent in a 24-hour
72   // period.  This uses the state persisted to the checkpoint file.
73   // The default value of -1 means that there is no limit on reports sent.
set_max_reports_per_day(int reports)74   void set_max_reports_per_day(int reports) {
75     max_reports_per_day_ = reports;
76   }
77 
max_reports_per_day()78   int max_reports_per_day() const { return max_reports_per_day_; }
79 
80   // Sends the specified minidump file, along with the map of
81   // name value pairs, as a multipart POST request to the given URL.
82   // Parameter names must contain only printable ASCII characters,
83   // and may not contain a quote (") character.
84   // Only HTTP(S) URLs are currently supported.  The return value indicates
85   // the result of the operation (see above for possible results).
86   // If report_code is non-NULL and the report is sent successfully (that is,
87   // the return value is RESULT_SUCCEEDED), a code uniquely identifying the
88   // report will be returned in report_code.
89   // (Otherwise, report_code will be unchanged.)
90   ReportResult SendCrashReport(const wstring &url,
91                                const map<wstring, wstring> &parameters,
92                                const wstring &dump_file_name,
93                                wstring *report_code);
94 
95  private:
96   // Reads persistent state from a checkpoint file.
97   void ReadCheckpoint(FILE *fd);
98 
99   // Called when a new report has been sent, to update the checkpoint state.
100   void ReportSent(int today);
101 
102   // Returns today's date (UTC) formatted as YYYYMMDD.
103   int GetCurrentDate() const;
104 
105   // Opens the checkpoint file with the specified mode.
106   // Returns zero on success, or an error code on failure.
107   int OpenCheckpointFile(const wchar_t *mode, FILE **fd);
108 
109   wstring checkpoint_file_;
110   int max_reports_per_day_;
111   // The last date on which we sent a report, expressed as YYYYMMDD.
112   int last_sent_date_;
113   // Number of reports sent on last_sent_date_
114   int reports_sent_;
115 
116   // Disallow copy constructor and operator=
117   explicit CrashReportSender(const CrashReportSender &);
118   void operator=(const CrashReportSender &);
119 };
120 
121 }  // namespace google_breakpad
122 
123 #pragma warning( pop )
124 
125 #endif  // CLIENT_WINDOWS_SENDER_CRASH_REPORT_SENDER_H__
126