准备完成通讯模块

backend/src/builtin-cli.cpp

@@ -29,7 +29,10 @@ void BookStoreMain(bool is_server, std::string config_dir) {
     // throw FatalError("Server mode has not been implemented yet", 1);
     std::unordered_map<std::string, SessionClass> session_map;
     std::string cmd;
+    std::ofstream fout("/tmp/log.txt");
     while (std::getline(std::cin, cmd)) {
+      fout << cmd << std::endl;
+      fout.flush();
       if (cmd[1] == 'O')  //`#OpenSession [TempChannelID]`
       {
         std::string new_session_token = GenerateRandomString(10);
@@ -42,6 +45,7 @@ void BookStoreMain(bool is_server, std::string config_dir) {
         ss >> temp_channel_id;
         std::cout << temp_channel_id << " Init 1\n"
                   << new_session_token << ' ' << new_outh_token << std::endl;
+        std::cout.flush();
       } else if (cmd[1] == 'S')
         return;
       else if (cmd[1] == 'C') {
@@ -52,16 +56,19 @@ void BookStoreMain(bool is_server, std::string config_dir) {
         if (session_map.find(session_token) == session_map.end()) {
           std::cout << session_token << ' ' << operation_token << " -1"
                     << std::endl;
+          std::cout.flush();
           continue;
         }
         if (session_map[session_token].OuthorizationKey != authentic_key) {
           std::cout << session_token << ' ' << operation_token << " -1"
                     << std::endl;
+          std::cout.flush();
           continue;
         }
         session_map.erase(session_token);
         std::cout << session_token << ' ' << operation_token << " 0"
                   << std::endl;
+        std::cout.flush();
       } else if (cmd[1] == 'W') {
         std::stringstream ss(cmd);
         std::string session_token, operation_token, authentic_key;
@@ -70,21 +77,25 @@ void BookStoreMain(bool is_server, std::string config_dir) {
         if (session_map.find(session_token) == session_map.end()) {
           std::cout << session_token << ' ' << operation_token << " -1"
                     << std::endl;
+          std::cout.flush();
           continue;
         }
         if (session_map[session_token].OuthorizationKey != authentic_key) {
           std::cout << session_token << ' ' << operation_token << " -1"
                     << std::endl;
+          std::cout.flush();
           continue;
         }
-        if (session_map[session_token].login_stack.size())
+        if (session_map[session_token].login_stack.size()) {
           std::cout << session_token << ' ' << operation_token << " 1\n"
                     << engine.QueryUserInfo(
                            session_map[session_token].login_stack.top().first)
                     << std::endl;
-        else {
+          std::cout.flush();
+        } else {
           std::cout << session_token << ' ' << operation_token
                     << " 1\n[nobody] -1" << std::endl;
+          std::cout.flush();
         }
       } else if (cmd[1] == 'R') {
         std::stringstream ss(cmd);
@@ -94,11 +105,13 @@ void BookStoreMain(bool is_server, std::string config_dir) {
         if (session_map.find(session_token) == session_map.end()) {
           std::cout << session_token << ' ' << operation_token << " -1"
                     << std::endl;
+          std::cout.flush();
           continue;
         }
         if (session_map[session_token].OuthorizationKey != authentic_key) {
           std::cout << session_token << ' ' << operation_token << " -1"
                     << std::endl;
+          std::cout.flush();
           continue;
         }
         std::getline(std::cin, cmd);
@@ -107,6 +120,7 @@ void BookStoreMain(bool is_server, std::string config_dir) {
         std::cout << session_token << ' ' << operation_token << " "
                   << ret.size() << std::endl;
         for (auto &line : ret) std::cout << line << std::endl;
+        std::cout.flush();
       }
     }
   }

frontend/Web/index.html

@@ -4,50 +4,56 @@
     <meta name="viewport" content="width=device-width,initial-scale=1.0">
     <title>Socket.IO chat</title>
     <style>
-      body { margin: 0; padding-bottom: 3rem; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; }
-
-      #form { background: rgba(0, 0, 0, 0.15); padding: 0.25rem; position: fixed; bottom: 0; left: 0; right: 0; display: flex; height: 3rem; box-sizing: border-box; backdrop-filter: blur(10px); }
-      #input { border: none; padding: 0 1rem; flex-grow: 1; border-radius: 2rem; margin: 0.25rem; }
-      #input:focus { outline: none; }
-      #form > button { background: #333; border: none; padding: 0 1rem; margin: 0.25rem; border-radius: 3px; outline: none; color: #fff; }
-
-      #messages { list-style-type: none; margin: 0; padding: 0; }
-      #messages > li { padding: 0.5rem 1rem; }
-      #messages > li:nth-child(odd) { background: #efefef; }
     </style>
   </head>
   <body>
-    <ul id="messages"></ul>
+    <!-- <ul id="messages"></ul>
     <form id="form" action="">
-      <input id="input" autocomplete="off" /><button>Send</button>
+      <textarea id="input" autocomplete="off" ></textarea><button id="submit_button" type="button">Send</button>
-    </form>
+    </form> -->
     <script src="/socket.io/socket.io.js"></script>
     <script>
       const socket = io();
-      const form = document.getElementById('form');
+      // const form = document.getElementById('form');
-      const input = document.getElementById('input');
+      // const input = document.getElementById('input');
-      const messages = document.getElementById('messages');
+      // const messages = document.getElementById('messages');
-      form.addEventListener("keydown", function(event){
+      // form.addEventListener("keydown", function(event) {
-        if (event.key === "Enter" && event.ctrlKey) {
+      //   if (event.key === "Enter") {
-          event.preventDefault();
+      //     event.stopPropagation();
-          if (input.value) {
+      //     console.log('enter triggered');
-            socket.emit('chat message', input.value);
+      //     if (event.ctrlKey) {
-            input.value = '';
+      //       console.log('ctrl triggered');
-          }
+      //       event.preventDefault();
-        }
+      //       if (input.value) {
-      });
+      //         socket.emit('request', input.value);
-      form.addEventListener('submit', (e) => {
+      //         input.value = '';
-        e.preventDefault();
+      //       }
-        if (input.value) {
+      //     } else {
-          socket.emit('chat message', input.value);
+      //       console.log('ctrl not triggered');
-          input.value = '';
+      //       event.preventDefault();
-        }
+      //       input.value=input.value;
-      });
+      //     }
-      socket.on('chat message', (msg) => {
+      //   }
-        const item = document.createElement('li');
+      // });
-        item.textContent = msg;
+      // form.addEventListener('submit', (e) => {
-        messages.appendChild(item);
+      //   console.log('submit triggered');
-        window.scrollTo(0, document.body.scrollHeight);
+      //   e.preventDefault();
+      // });
+      // var button = document.getElementById("submit_button");
+      // button.addEventListener('click', function(e) {
+      //   e.preventDefault();
+      //   console.log('button triggered');
+      //   if (input.value) {
+      //     socket.emit('request', input.value);
+      //     input.value = '';
+      //   }
+      // });
+      socket.on('response', (msg) => {
+        console.log("Get response from sever: "+msg);
+        // const item = document.createElement('div');
+        // item.textContent = msg;
+        // messages.appendChild(item);
+        // window.scrollTo(0, document.body.scrollHeight);
       });
     </script>
   </body>

frontend/Web/index.js

@@ -6,20 +6,150 @@ const { Server } = require('socket.io');
 const app = express();
 const server = createServer(app);
 const io = new Server(server);
+class Queue {
+  constructor() {
+    this.items = [];
+  }
 
+  // 添加元素到队列的尾部
+  enqueue(element) {
+    this.items.push(element);
+  }
+
+  // 从队列的头部移除元素并返回移除的元素
+  dequeue() {
+    if (this.isEmpty()) {
+      return null;
+    }
+    return this.items.shift();
+  }
+
+  // 返回队列的头部元素
+  front() {
+    if (this.isEmpty()) {
+      return null;
+    }
+    return this.items[0];
+  }
+
+  // 检查队列是否为空
+  isEmpty() {
+    return this.items.length === 0;
+  }
+
+  // 返回队列的大小
+  size() {
+    return this.items.length;
+  }
+
+  // 清空队列
+  clear() {
+    this.items = [];
+  }
+}
+
+function sleep(ms) {
+  return new Promise(resolve => setTimeout(resolve, ms));
+}
+
+const message_map=new Map();
+const { spawn } = require('child_process');
+const backend=spawn('/workspaces/BH-Bookstore-2023/build/code',['-s','-c','/tmp/conf/']);
+
+const AsyncLock = require('async-lock');
+const lock = new AsyncLock();
+
+function SendRequest(data) {
+  console.log("SendRequest called");
+  return new Promise((resolve, reject) => {
+    lock.acquire('myLock', (done) => {
+      console.log("SendRequest acquired lock");
+      console.log("sending data to backend: "+data)
+      backend.stdin.write(data+'\n', (error) => {
+        done();
+        if (error) {
+          reject(error);
+        } else {
+          resolve();
+        }
+      });
+    });
+  });
+}
+
+function GetResult(session_token,operation_token) {
+  console.log("GetResult called");
+  while(true)
+  {
+    if(message_map.has(session_token))
+    {
+      if(message_map.get(session_token).has(operation_token))
+      {
+        const ret=message_map.get(session_token).get(operation_token);
+        message_map.get(session_token).delete(operation_token);
+        return ret;
+      }
+    }
+    sleep(100);
+  }
+}
+let buffer = '';
+const response_queue=new Queue();
+backend.stdout.on('data', (data) => {
+  console.log(`stdout: ${data}`);
+  buffer += data.toString();
+  while (buffer.includes('\n')) {
+      const lineEnd = buffer.indexOf('\n');
+      const line = buffer.slice(0, lineEnd);
+      buffer = buffer.slice(lineEnd + 1);
+      console.log(`C++ Program Output: ${line}`);
+      response_queue.enqueue(line);
+  }
+});
+// SendRequest("#OpenSession InnerTest")
 app.get('/', (req, res) => {
   res.sendFile(join(__dirname, 'index.html'));
 });
 
-io.on('connection', (socket) => {
+io.on('connection', async (socket) => {
   console.log('a user connected');
   socket.on('disconnect', () => {
     console.log('user disconnected');
   });
-  socket.on('chat message', (msg) => {
+  socket.on('request', async (msg) => {
     console.log('message: ' + msg);
-    socket.emit('chat message', '[self]'+msg);
+    const substrings = msg.trim().split('\n')[0].split(' ');
-    socket.broadcast.emit('chat message', '[other]'+msg);
+    const head=substrings[0];
+    if(head[1]=='S')
+    {
+      backend.stdin.write("#ShutDownSystem\n");
+      sleep(1000);
+      process.exit(0);
+    }
+    const session_token=substrings[1];
+    if(head[1]=='O')
+    {
+      SendRequest(msg);
+      ret=await GetResult(session_token,"Init");
+      console.log("ret: "+ret);
+      socket.emit('response', ret);
+    }
+    else{
+      const operation_token=substrings[2];
+      const outhentication_key=substrings[3];
+      const command=msg.trim().split('\n')[1];
+      console.log('head: ' + head);
+      console.log('session_token: ' + session_token);
+      console.log('operation_token: ' + operation_token);
+      console.log('outhentication_key: ' + outhentication_key);
+      console.log('command: ' + command);
+      console.log("sending request to backend")
+      SendRequest(msg);
+      if(!message_map.has(session_token)) message_map.set(session_token, new Map());
+      ret=await GetResult(session_token,operation_token);
+      console.log("ret: "+ret);
+      socket.emit('response', ret);
+    }
   });
 });
 

frontend/Web/package-lock.json

@@ -9,7 +9,10 @@
       "version": "0.0.0.1",
       "license": "ISC",
       "dependencies": {
+        "async-lock": "^1.4.0",
+        "async-mutex": "^0.4.0",
         "express": "^4.18.2",
+        "mutex-js": "^1.1.5",
         "socket.io": "^4.7.2"
       }
     },
@@ -56,6 +59,19 @@
       "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
       "integrity": "sha512-PCVAQswWemu6UdxsDFFX/+gVeYqKAod3D3UVm91jHwynguOwAvYPhx8nNlM++NqRcK6CxxpUafjmhIdKiHibqg=="
     },
+    "node_modules/async-lock": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/async-lock/-/async-lock-1.4.0.tgz",
+      "integrity": "sha512-coglx5yIWuetakm3/1dsX9hxCNox22h7+V80RQOu2XUUMidtArxKoZoOtHUPuR84SycKTXzgGzAUR5hJxujyJQ=="
+    },
+    "node_modules/async-mutex": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/async-mutex/-/async-mutex-0.4.0.tgz",
+      "integrity": "sha512-eJFZ1YhRR8UN8eBLoNzcDPcy/jqjsg6I1AP+KvWQX80BqOSW1oJPJXDylPUEeMr2ZQvHgnQ//Lp6f3RQ1zI7HA==",
+      "dependencies": {
+        "tslib": "^2.4.0"
+      }
+    },
     "node_modules/base64id": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/base64id/-/base64id-2.0.0.tgz",
@@ -519,6 +535,11 @@
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.0.0.tgz",
       "integrity": "sha512-Tpp60P6IUJDTuOq/5Z8cdskzJujfwqfOTkrwIwj7IRISpnkJnT6SyJ4PCPnGMoFjC9ddhal5KVIYtAt97ix05A=="
     },
+    "node_modules/mutex-js": {
+      "version": "1.1.5",
+      "resolved": "https://registry.npmjs.org/mutex-js/-/mutex-js-1.1.5.tgz",
+      "integrity": "sha512-e0PCNr2q4Er5SNrRwE/1yDFe8ILOk0yS4xFuDbO0KOfr3/5VmUcWB6SaTFaxRPqC/MWiGkfBuTRgIGz5EJtlcA=="
+    },
     "node_modules/negotiator": {
       "version": "0.6.3",
       "resolved": "https://registry.npmjs.org/negotiator/-/negotiator-0.6.3.tgz",
@@ -808,6 +829,11 @@
         "node": ">=0.6"
       }
     },
+    "node_modules/tslib": {
+      "version": "2.6.2",
+      "resolved": "https://registry.npmjs.org/tslib/-/tslib-2.6.2.tgz",
+      "integrity": "sha512-AEYxH93jGFPn/a2iVAwW87VuUIkR1FVUKB77NwMF7nBTDkDrrT/Hpt/IrCJ0QXhW27jTBDcf5ZY7w6RiqTMw2Q=="
+    },
     "node_modules/type-is": {
       "version": "1.6.18",
       "resolved": "https://registry.npmjs.org/type-is/-/type-is-1.6.18.tgz",

frontend/Web/package.json

@@ -11,7 +11,10 @@
   "license": "ISC",
   "type": "commonjs",
   "dependencies": {
+    "async-lock": "^1.4.0",
+    "async-mutex": "^0.4.0",
     "express": "^4.18.2",
+    "mutex-js": "^1.1.5",
     "socket.io": "^4.7.2"
   }
 }