// Copyright (c) 2006, Google Inc.
// All rights reserved.
//
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// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
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// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#ifndef CLIENT_WINDOWS_SENDER_CRASH_REPORT_SENDER_H__
#define CLIENT_WINDOWS_SENDER_CRASH_REPORT_SENDER_H__

// CrashReportSender is a "static" class which provides an API to upload
// crash reports via HTTP.  A crash report is formatted as a multipart POST
// request, which contains a set of caller-supplied string key/value pairs,
// and a minidump file to upload.

#include <string>
#include <map>
#include <vector>

namespace google_airbag {

using std::string;
using std::wstring;
using std::map;
using std::vector;

class CrashReportSender {
 public:
  // Sends the specified minidump file, along with the map of
  // name value pairs, as a multipart POST request to the given URL.
  // Parameter names must contain only printable ASCII characters,
  // and may not contain a quote (") character.
  // Only HTTP URLs are currently supported.  Returns true on success.
  // TODO(bryner): we should expose the response to the caller.
  static bool SendCrashReport(const wstring &url,
                              const map<wstring, wstring> &parameters,
                              const wstring &dump_file_name);

 private:
  class AutoInternetHandle;

  // Generates a new multipart boundary for a POST request
  static wstring GenerateMultipartBoundary();

  // Generates a HTTP request header for a multipart form submit.
  static wstring GenerateRequestHeader(const wstring &boundary);

  // Given a set of parameters and a minidump file name,
  // generates a multipart request body string with these parameters
  // and minidump contents.  Returns true on success.
  static bool GenerateRequestBody(const map<wstring, wstring> &parameters,
                                  const wstring &minidump_filename,
                                  const wstring &boundary,
                                  string *request_body);

  // Fills the supplied vector with the contents of filename.
  static void GetFileContents(const wstring &filename, vector<char> *contents);

  // Converts a UTF16 string to UTF8.
  static string WideToUTF8(const wstring &wide);

  // Checks that the given list of parameters has only printable
  // ASCII characters in the parameter name, and does not contain
  // any quote (") characters.  Returns true if so.
  static bool CheckParameters(const map<wstring, wstring> &parameters);

  // No instances of this class should be created.
  // Disallow all constructors, destructors, and operator=.
  CrashReportSender();
  explicit CrashReportSender(const CrashReportSender &);
  void operator=(const CrashReportSender &);
  ~CrashReportSender();
};

}  // namespace google_airbag

#endif  // CLIENT_WINDOWS_SENDER_CRASH_REPORT_SENDER_H__