update network sample

Easy2D/common/Json.h

@@ -901,7 +901,7 @@ namespace easy2d
 				case JsonType::String:
 				{
 					out->write('\"');
-					out->write(json.value_.data.string->c_str());
+					dump_string(*json.value_.data.string);
 					out->write('\"');
 					return;
 				}
@@ -986,6 +986,31 @@ namespace easy2d
 				out->write(number_buffer.data());
 			}
 
+			void dump_string(const string_type & val)
+			{
+				for (const auto& ch : val)
+				{
+					switch (ch)
+					{
+					case '\t':
+						out->write('\\');
+						out->write('t');
+						break;
+					case '\r':
+						out->write('\\');
+						out->write('r');
+						break;
+					case '\n':
+						out->write('\\');
+						out->write('n');
+						break;
+					default:
+						out->write(ch);
+						break;
+					}
+				}
+			}
+
 		private:
 			output_adapter<char_type>* out;
 			char_type indent_char;
@@ -1247,10 +1272,20 @@ namespace easy2d
 				{
 					string_buffer.clear();
 
+					bool must_read_next = false;
 					while (true)
 					{
 						const auto ch = read_next();
-						if (ch == '\"')
+
+						if (must_read_next)
+						{
+							must_read_next = false;
+						}
+						else if (ch == '\\')
+						{
+							must_read_next = true;
+						}
+						else if (ch == '\"')
 						{
 							// skip last \"
 							read_next();

Easy2D/common/String.h

@@ -554,7 +554,7 @@ namespace easy2d
 	{
 		discard_const_data();
 
-		if (cstr)
+		if (cstr && count)
 		{
 			if (count > capacity_)
 			{

samples/Samples/Demo5.h

@@ -15,10 +15,11 @@ public:
 
 	Demo5()
 	{
+		// 添加按键监听
 		AddListener(Event::KeyDown, Closure(this, &Demo5::OnKeyDown));
 
 		// 创建说明文字
-		TextPtr text = new Text(L"按空格键发送测试请求");
+		TextPtr text = new Text(L"按G发送GET请求\n按P发送POST请求\n按U发送PUT请求\n按D发送DELETE请求");
 		// 设置节点大小为文字布局大小
 		text->SetSize(text->GetLayoutSize());
 		// 设置文字位置
@@ -31,30 +32,107 @@ public:
 
 	void OnEnter() override
 	{
+		// 进入场景时打开控制台
 		Application::ShowConsole(true);
-		SendRequest();
 	}
 
 	void OnExit() override
 	{
+		// 退出场景时关闭控制台
 		Application::ShowConsole(false);
 	}
 
 	void OnKeyDown(Event const& e)
 	{
-		if (e.key.code == KeyCode::Space)
+		// 按不同键发送不同请求
+		if (e.key.code == KeyCode::G)
 		{
-			SendRequest();
+			SendGetRequest();
+		}
+		else if (e.key.code == KeyCode::P)
+		{
+			SendPostRequest();
+		}
+		else if (e.key.code == KeyCode::U)
+		{
+			SendPutRequest();
+		}
+		else if (e.key.code == KeyCode::D)
+		{
+			SendDeleteRequest();
 		}
 	}
 
-	void SendRequest()
+	void SendGetRequest()
 	{
-		Logger::Instance().Println(L"Start to send request...");
+		// 发送 GET 请求
+		Logger::Instance().Println(L"Start to send GET request...");
 
 		HttpRequestPtr request = new HttpRequest;
+		// 设置请求 URL
 		request->SetUrl(L"http://httpbin.org/get");
+		// 设置请求类型为 GET
 		request->SetType(HttpRequest::Type::Get);
+		// 设置请求完成后的回调函数
+		request->SetResponseCallback(Closure(this, &Demo5::Complete));
+
+		// 发送 HTTP 请求
+		HttpClient::Instance().Send(request);
+	}
+
+	void SendPostRequest()
+	{
+		// 发送 POST 请求
+		Logger::Instance().Println(L"Start to send POST request...");
+
+		// 创建 JSON 格式的 POST 数据
+		Json request_data = {
+			{"String", "StringTest"},
+			{"Boolean", true},
+			{"Integer", 12},
+			{"Float", 3.125},
+			{"Array", {1, 2, 3, 4, 4.5 }},
+			{"Object", {"Key", "Value"}},
+		};
+
+		HttpRequestPtr request = new HttpRequest;
+		request->SetUrl(L"http://httpbin.org/post");
+		request->SetType(HttpRequest::Type::Post);
+		// 设置 POST 请求的数据
+		request->SetData(request_data.dump());
+		request->SetResponseCallback(Closure(this, &Demo5::Complete));
+
+		HttpClient::Instance().Send(request);
+	}
+
+	void SendPutRequest()
+	{
+		// 发送 PUT 请求
+		Logger::Instance().Println(L"Start to send PUT request...");
+
+		// 创建 JSON 格式的 PUT 数据
+		Json request_data = {
+			{"user", {{"id", 1}, {"phone", "12345678"}}},
+		};
+
+		HttpRequestPtr request = new HttpRequest;
+		request->SetUrl(L"http://httpbin.org/put");
+		request->SetType(HttpRequest::Type::Put);
+		// 设置 PUT 请求的数据
+		request->SetData(request_data.dump());
+		request->SetResponseCallback(Closure(this, &Demo5::Complete));
+
+		HttpClient::Instance().Send(request);
+	}
+
+	void SendDeleteRequest()
+	{
+		// 发送 DELETE 请求
+		Logger::Instance().Println(L"Start to send DELETE request...");
+
+		HttpRequestPtr request = new HttpRequest;
+		request->SetUrl(L"http://httpbin.org/delete");
+		request->SetType(HttpRequest::Type::Delete);
 		request->SetResponseCallback(Closure(this, &Demo5::Complete));
 
 		HttpClient::Instance().Send(request);
@@ -62,22 +140,39 @@ public:
 
 	void Complete(HttpRequestPtr request, HttpResponsePtr response)
 	{
+		// 判断请求是否成功
 		if (response->IsSucceed())
 		{
+			try
+			{
+				// 将获取到的数据解析成 JSON 格式
 				Json response_data = Json::parse(response->GetData());
 				Json result = {
 					{L"HttpCode", response->GetResponseCode()},
 					{L"Data", response_data},
 				};
+
 				std::wcout << L"Response: " << std::endl << result.dump(4) << std::endl;
 			}
+			catch (json_exception& e)
+			{
+				E2D_ERROR_LOG(L"Parse JSON failed: %s", e.what());
+			}
+		}
 		else
 		{
+			// 请求失败时打印错误信息
+			OutputError(response);
+		}
+	}
+
+	void OutputError(HttpResponsePtr response)
+	{
+		// 打印 HTTP 响应结果的状态码和错误信息
 		Json result = {
 				{L"HttpCode", response->GetResponseCode()},
 				{L"Error", response->GetError()},
 		};
 		std::wcout << L"Response: " << std::endl << result.dump(4) << std::endl;
 	}
-	}
 };