Client Scheme Handler

// Copyright (c) 2009 The Chromium Embedded Framework Authors. All rights // reserved. Use of this source code is governed by a BSD-style license that // can be found in the LICENSE file. #include "scheme_test.h" #include "string_util.h" #include "resource_util.h" #include "resource.h" // Implementation of the schema handler for client:// requests. class ClientSchemeHandler : public CefThreadSafeBase { public: ClientSchemeHandler() : size_(0), offset_(0), bytes_(NULL) {} // Process the request. All response generation should take place in this // method. If there is no response set |response_length| to zero and // ReadResponse() will not be called. If the response length is not known then // set |response_length| to -1 and ReadResponse() will be called until it // returns false or until the value of |bytes_read| is set to 0. Otherwise, // set |response_length| to a positive value and ReadResponse() will be called // until it returns false, the value of |bytes_read| is set to 0 or the // specified number of bytes have been read. If there is a response set // |mime_type| to the mime type for the response. virtual bool ProcessRequest(CefRefPtr request, std::wstring& mime_type, int* response_length) { bool handled = false; Lock(); std::wstring url = request->GetURL(); if(wcsstr(url.c_str(), L"handler.html") != NULL) { // Build the response html html_ = "Client Scheme Handler" "This contents of this page page are served by the " "ClientSchemeHandler class handling the client:// protocol." "
You should see an image:" "

";
      
      // Output a string representation of the request
      std::wstring dump;
      DumpRequestContents(request, dump);
      html_.append(WStringToString(dump));

      html_.append("

Try the test form:" ""); handled = true; size_ = html_.size(); bytes_ = (LPBYTE)html_.c_str(); // Set the resulting mime type mime_type = L"text/html"; } else if(wcsstr(url.c_str(), L"client.gif") != NULL) { // Load the response image if(LoadBinaryResource(IDS_LOGO, size_, bytes_)) { handled = true; // Set the resulting mime type mime_type = L"image/jpg"; } } // Set the resulting response length *response_length = size_; Unlock(); return handled; } // Cancel processing of the request. virtual void Cancel() { } // Copy up to |bytes_to_read| bytes into |data_out|. If the copy succeeds // set |bytes_read| to the number of bytes copied and return true. If the // copy fails return false and ReadResponse() will not be called again. virtual bool ReadResponse(void* data_out, int bytes_to_read, int* bytes_read) { bool has_data = false; *bytes_read = 0; Lock(); if(offset_ < size_) { // Copy the next block of data into the buffer. int transfer_size = min(bytes_to_read, static_cast(size_ - offset_)); memcpy(data_out, bytes_ + offset_, transfer_size); offset_ += transfer_size; *bytes_read = transfer_size; has_data = true; } Unlock(); return has_data; } private: DWORD size_, offset_; LPBYTE bytes_; std::string html_; }; // Implementation of the factory for for creating schema handlers. class ClientSchemeHandlerFactory : public CefThreadSafeBase { public: // Return a new scheme handler instance to handle the request. virtual CefRefPtr Create() { return new ClientSchemeHandler(); } }; void InitSchemeTest() { CefRegisterScheme(L"client", L"tests", new ClientSchemeHandlerFactory()); } void RunSchemeTest(CefRefPtr browser) { browser->GetMainFrame()->LoadURL(L"client://tests/handler.html"); }