小票打印机

src/utils/printer/Common.js

@@ -0,0 +1,192 @@
+var port = 18080;
+var connectionMode = "ws:";
+var wsPrint = null;
+let wsGetPrinterList = null;
+var CHUNK_SIZE = 1024 * 64;
+
+const WebSocketPrint = function (serverURL, strPrinterName, request, callback) {
+  var _websocket;
+  var _callback = callback;
+  var _request = request;
+  var _connectedsocket = false;
+
+  var onMessage = function (msg) {
+    if (_websocket.readyState == 1) {
+      var res = JSON.parse(msg.data);
+      var ret = res.statusMessage;
+      var printerStatus;
+      if (res.printerStatus !== undefined) {
+        printerStatus = res.printerStatus.message;
+        ret += ":" + printerStatus;
+      }
+      _callback(res);
+    } else {
+      _callback(msg.data);
+    }
+  };
+
+  var onClose = function (msg) {
+    if (!_connectedsocket) {
+      _callback("Cannot connect to server");
+    }
+    _websocket.close();
+    _connectedsocket = false;
+    wsPrint = null;
+  };
+
+  var webSocketInit = function (uri) {
+    _websocket = new WebSocket(uri);
+    _websocket.binaryType = "arraybuffer";
+    _websocket.onopen = function (event) {
+      console.log("open : " + uri);
+    };
+    _websocket.onerror = function (event) {
+      wsPrint = null;
+      if (_websocket.readyState == 3) {
+        _callback("Cannot connect to server");
+      }
+    };
+    _websocket.onmessage = function (msg) {
+      onMessage(msg);
+    };
+    _websocket.onclose = function (msg) {
+      onClose(msg);
+    };
+  };
+
+  webSocketInit(serverURL + strPrinterName + _request);
+
+  this.send = function (data) {
+    const sendData = () => {
+      for (let i = 0; i < data.length; i += CHUNK_SIZE) {
+        const chunk = data.slice(i, i + CHUNK_SIZE);
+        _websocket.send(chunk);
+      }
+    };
+
+    if (_websocket.readyState === WebSocket.OPEN) {
+      sendData();
+    } else if (_websocket.readyState === WebSocket.CONNECTING) {
+      const originalOnOpen = _websocket.onopen;
+      _websocket.onopen = function(event) {
+        if (originalOnOpen) originalOnOpen(event);
+        sendData();
+        _connectedsocket = true;
+      };
+    }
+  };
+
+  this.disconnect = function () {
+    if (_websocket && _websocket.readyState === WebSocket.OPEN) {
+      console.log("Closing WebSocket connection...");
+      _websocket.close();
+    }
+  };
+};
+
+const WebSocketGetPrinterList = function (serverURL, callback) {
+  var _websocket;
+  var _callback = callback;
+  var _connectedsocket = false;
+
+  var onMessage = function (msg) {
+    if (_websocket.readyState == 1) {
+      var res = JSON.parse(msg.data);
+      _callback(res);
+    } else {
+      a;
+      _callback(msg.data);
+    }
+  };
+
+  var onClose = function (msg) {
+    if (!_connectedsocket) {
+      _callback("Cannot connect to server");
+    }
+    _websocket.close();
+    _connectedsocket = false;
+    wsGetPrinterList = null;
+  };
+
+  var webSocketInit = function (uri) {
+    _websocket = new WebSocket(uri);
+    _websocket.onopen = function (event) {
+      console.log("open : " + uri);
+    };
+    _websocket.onerror = function (event) {
+      wsGetPrinterList = null;
+      if (_websocket.readyState == 3) {
+        _callback("Cannot connect to server");
+      }
+    };
+    _websocket.onmessage = function (msg) {
+      onMessage(msg);
+    };
+    _websocket.onclose = function (msg) {
+        console.log("WebSocket connection closed");
+      onClose(msg);
+    };
+  };
+
+  webSocketInit(serverURL);
+
+  this.send = function (strSubmit) {
+    if (_websocket.readyState == 1) {
+      _websocket.send(strSubmit);
+    } else {
+      _websocket.onopen = function () {
+        if (_websocket.readyState == 1) {
+          _websocket.send(strSubmit);
+          _connectedsocket = true;
+        }
+      };
+    }
+  };
+};
+
+function setPort(serverPort) {
+  port = serverPort;
+}
+
+function getServerURL() {
+  var localAddress = `//127.0.0.1:${port}/WebSDK/`;
+  var serverURL = connectionMode + localAddress;
+  return {
+    url: serverURL,
+  };
+}
+
+function setConnectionMode(mode) {
+  connectionMode = mode;
+}
+
+function requestPrint(strPrinterName, strSubmit, _callback) {
+  _callback("");
+  var serverURL = getServerURL().url;
+  console.log(serverURL);
+
+  if (wsPrint == null)
+    wsPrint = new WebSocketPrint(serverURL, strPrinterName, "", _callback);
+  const encoder = new TextEncoder();
+  const bytesSubmit = encoder.encode(strSubmit);
+  wsPrint.send(bytesSubmit);
+}
+
+function getPrinterList(category, _callback) {
+  var serverURL = getServerURL().url + "getPrinterList";
+  if (wsGetPrinterList == null) {
+    wsGetPrinterList = new WebSocketGetPrinterList(serverURL, _callback);
+  }
+  wsGetPrinterList.send(JSON.stringify(category));
+}
+
+export {
+  setPort,
+  getServerURL,
+  setConnectionMode,
+  requestPrint,
+  getPrinterList,
+  wsPrint,
+  WebSocketPrint,
+  WebSocketGetPrinterList
+}