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 // Copyright (c) 2006, Google Inc.

 // All rights reserved.

 //

 // Redistribution and use in source and binary forms, with or without

 // 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.

 //     * Neither the name of Google Inc. nor the names of its

 // contributors may be used to endorse or promote products derived from

 // this software without specific prior written permission.

 //

 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 // HTTPUpload provides a "nice" API to send a multipart HTTP(S) POST

 // request using wininet.  It currently supports requests that contain

 // a set of string parameters (key/value pairs), and a file to upload.

 #ifndef COMMON_WINDOWS_HTTP_UPLOAD_H__

 #define COMMON_WINDOWS_HTTP_UPLOAD_H__

 #pragma warning( push )

 // Disable exception handler warnings.

 #pragma warning( disable : 4530 ) 

 #include <Windows.h>

 #include <WinInet.h>

 #include <map>

 #include <string>

 #include <vector>

 namespace google_breakpad {

 using std::string;

 using std::wstring;

 using std::map;

 using std::vector;

 class HTTPUpload {

  public:

   // Sends the given set of parameters, along with the contents of

   // upload_file, as a multipart POST request to the given URL.

   // file_part_name contains the name of the file part of the request

   // (i.e. it corresponds to the name= attribute on an <input type="file">.

   // Parameter names must contain only printable ASCII characters,

   // and may not contain a quote (") character.

   // Only HTTP(S) URLs are currently supported.  Returns true on success.

   // If the request is successful and response_body is non-NULL,

   // the response body will be returned in response_body.

   // If response_code is non-NULL, it will be set to the HTTP response code

   // received (or 0 if the request failed before getting an HTTP response).

   static bool SendRequest(const wstring &url,

                           const map<wstring, wstring> &parameters,

                           const wstring &upload_file,

                           const wstring &file_part_name,

                           int *timeout,

                           wstring *response_body,

                           int *response_code);

  private:

   class AutoInternetHandle;

   // Retrieves the HTTP response.  If NULL is passed in for response,

   // this merely checks (via the return value) that we were successfully

   // able to retrieve exactly as many bytes of content in the response as

   // were specified in the Content-Length header.

   static bool HTTPUpload::ReadResponse(HINTERNET request, wstring* response);

   // 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, an upload filename, and a file part 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 &upload_file,

                                   const wstring &file_part_name,

                                   const wstring &boundary,

                                   string *request_body);

   // Fills the supplied vector with the contents of filename.

   static bool GetFileContents(const wstring &filename, vector<char> *contents);

   // Converts a UTF8 string to UTF16.

   static wstring UTF8ToWide(const string &utf8);

   // 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=.

   HTTPUpload();

   explicit HTTPUpload(const HTTPUpload &);

   void operator=(const HTTPUpload &);

   ~HTTPUpload();

 };

 }  // namespace google_breakpad

 #pragma warning( pop )

 #endif  // COMMON_WINDOWS_HTTP_UPLOAD_H__