1 /*
2  * Copyright (c) 2021 Huawei Device Co., Ltd.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #ifndef FOUNDATION_ACE_NAPI_TEST_NATIVE_MODULE_NETSERVER_NETSERVER_H
17 #define FOUNDATION_ACE_NAPI_TEST_NATIVE_MODULE_NETSERVER_NETSERVER_H
18 
19 #include "event_target.h"
20 
21 #include "napi/native_api.h"
22 #include "napi/native_node_api.h"
23 #include "securec.h"
24 
25 #include "uv.h"
26 
27 #define EVENT_TYPE_BUFFER_SIZE 64
28 
29 struct WriteReq {
30     uv_write_t req = { 0 };
31     uv_buf_t buf = { 0 };
32 };
33 
34 class NetServerEvent {
35 public:
36     NetServerEvent(napi_env env, const char* type, char* buffer = nullptr, size_t length = 0)
37     {
38         env_ = env;
39 
40         (void)strncpy_s(type_, EVENT_TYPE_BUFFER_SIZE, type, strlen(type));
41 
42         buffer_ = buffer;
43         length_ = length;
44     }
45 
~NetServerEvent()46     virtual ~NetServerEvent() {}
47 
ToJsObject()48     virtual napi_value ToJsObject()
49     {
50         napi_value result;
51         napi_create_object(env_, &result);
52 
53         napi_value type;
54         napi_create_string_utf8(env_, type_, strlen(type_), &type);
55         napi_set_named_property(env_, result, "type", type);
56 
57         if (length_ > 0) {
58             napi_value data;
59             napi_create_string_utf8(env_, buffer_, length_, &data);
60             napi_set_named_property(env_, result, "data", data);
61         }
62 
63         return result;
64     }
65 
66 private:
67     napi_env env_;
68 
69     char type_[EVENT_TYPE_BUFFER_SIZE];
70     char* buffer_;
71     size_t length_;
72 };
73 
74 struct NetClient {
75     uv_tcp_t tcp = { 0 };
76     uv_write_t req = { 0 };
77     uv_buf_t buf = { 0 };
78     NetClient* next = nullptr;
79 };
80 
81 class NetServer : public EventTarget {
82     NetServer(napi_env env, napi_value thisVar);
83     virtual ~NetServer();
84 
85 public:
86     int Start(int port);
87     void Stop();
88 
89     static napi_value Export(napi_env env, napi_value exports);
90 
91 private:
92     // Napi methods and properties
93     static napi_value JS_Constructor(napi_env env, napi_callback_info cbinfo);
94     static napi_value JS_Start(napi_env env, napi_callback_info cbinfo);
95     static napi_value JS_Stop(napi_env env, napi_callback_info cbinfo);
96     static napi_value JS_On(napi_env env, napi_callback_info cbinfo);
97     static napi_value JS_Once(napi_env env, napi_callback_info cbinfo);
98     static napi_value JS_Off(napi_env env, napi_callback_info cbinfo);
99 
100     // C function and members
101     static void EchoAlloc(uv_handle_t* handle, size_t suggestedSize, uv_buf_t* buf);
102     static void AfterShutdown(uv_shutdown_t* req, int status);
103     static void AfterWrite(uv_write_t* req, int status);
104     static void AfterRead(uv_stream_t*, ssize_t nread, const uv_buf_t* buf);
105     static void TakeDiffactionsByStatus(uv_stream_t* handle, ssize_t nread,
106                                         const uv_buf_t* buf, NetServer* that);
107     static void OnClose(uv_handle_t* peer);
108     static void OnServerClose(uv_handle_t* handle);
109     static void OnConnection(uv_stream_t*, int status);
110 
111     uv_loop_t* loop_;
112     int serverClosed_;
113     uv_tcp_t tcpServer_;
114     NetClient* clients_;
115 };
116 
117 #endif /* FOUNDATION_ACE_NAPI_TEST_NATIVE_MODULE_NETSERVER_NETSERVER_H */
118