Dynamsoft · Cube-J · Jun 16, 2022 · May 23, 2022 · Jun 10, 2022 · Jun 16, 2022
diff --git a/1.hello-world/1.hello-world.html b/1.hello-world/1.hello-world.html
@@ -46,20 +46,26 @@
                  * "duplicateForgetTime" in "ScanSettings". By default it is set to 3000 ms.
                  */
                 scanner.onUniqueRead = (txt, result) => {
-                    alert(txt);
-                    console.log("Unique Code Found: ", result);
-                }
-                /**
-                 * show() opens the camera and shows the video stream on the page. 
-                 * After that, the library starts to scan the frame images continuously.
-                 */
+                        alert(txt);
+                        console.log("Unique Code Found: ", result);
+                    }
+                    /**
+                     * show() opens the camera and shows the video stream on the page. 
+                     * After that, the library starts to scan the frame images continuously.
+                     */
                 await scanner.show();
             } catch (ex) {
-                alert(ex);
-                throw ex;
+                let errMsg;
+                if (ex.message.includes("network connection error")) {
+                    errMsg = "Failed to connect to Dynamsoft License Server: network connection error. Check your Internet connection or contact Dynamsoft Support (support@dynamsoft.com) to acquire an offline license.";
+                } else {
+                    errMsg = ex.message||ex;
+                }
+                console.error(errMsg);
+                alert(errMsg);
             }
         })();
     </script>
 </body>
 
-</html>
+</html>
diff --git a/1.hello-world/10.read-video-pwa/helloworld-pwa.html b/1.hello-world/10.read-video-pwa/helloworld-pwa.html
@@ -64,8 +64,14 @@ <h1 style="font-size: 1.5em;">Hello World for PWA</h1>
                 }
                 await scanner.show();
             } catch (ex) {
-                alert(ex.message);
-                throw ex;
+                let errMsg;
+                if (ex.message.includes("network connection error")) {
+                    errMsg = "Failed to connect to Dynamsoft License Server: network connection error. Check your Internet connection or contact Dynamsoft Support (support@dynamsoft.com) to acquire an offline license.";
+                } else {
+                    errMsg = ex.message||ex;
+                }
+                console.error(errMsg);
+                alert(errMsg);
             }
         })();
 

diff --git a/1.hello-world/11.read-video-requirejs.html b/1.hello-world/11.read-video-requirejs.html
@@ -47,8 +47,14 @@ <h1 style="font-size: 1.5em;">Hello World for RequireJS</h1>
                     }
                     await scanner.show();
                 } catch (ex) {
-                    alert(ex.message);
-                    throw ex;
+                    let errMsg;
+                    if (ex.message.includes("network connection error")) {
+                        errMsg = "Failed to connect to Dynamsoft License Server: network connection error. Check your Internet connection or contact Dynamsoft Support (support@dynamsoft.com) to acquire an offline license.";
+                    } else {
+                        errMsg = ex.message||ex;
+                    }
+                    console.error(errMsg);
+                    alert(errMsg);
                 }
             })();
         })

diff --git a/1.hello-world/12.read-video-es6.html b/1.hello-world/12.read-video-es6.html
@@ -54,8 +54,14 @@ <h1 style="font-size: 1.5em;">Hello World for ES6</h1>
                 }
                 await scanner.show();
             } catch (ex) {
-                alert(ex.message);
-                throw ex;
+                let errMsg;
+                if (ex.message.includes("network connection error")) {
+                    errMsg = "Failed to connect to Dynamsoft License Server: network connection error. Check your Internet connection or contact Dynamsoft Support (support@dynamsoft.com) to acquire an offline license.";
+                } else {
+                    errMsg = ex.message||ex;
+                }
+                console.error(errMsg);
+                alert(errMsg);
             }
         })();
     </script>

diff --git a/1.hello-world/2.read-an-image.html b/1.hello-world/2.read-an-image.html
@@ -56,8 +56,14 @@ <h1 style="font-size: 1.5em;">Read Barcode from Images</h1>
             } catch (ex) {
                 document.getElementById('p-loading').innerText = ex;
                 document.getElementById('ipt-file').disabled = true;
-                alert(ex);
-                throw ex;
+                let errMsg;
+                if (ex.message.includes("network connection error")) {
+                    errMsg = "Failed to connect to Dynamsoft License Server: network connection error. Check your Internet connection or contact Dynamsoft Support (support@dynamsoft.com) to acquire an offline license.";
+                } else {
+                    errMsg = ex.message||ex;
+                }
+                console.error(errMsg);
+                alert(errMsg);
             }
         })();
 
@@ -101,8 +107,14 @@ <h1 style="font-size: 1.5em;">Read Barcode from Images</h1>
                 divResults.appendChild(document.createElement('hr'));
                 divResults.scrollTop = divResults.scrollHeight;
             } catch (ex) {
-                alert(ex);
-                throw ex;
+                let errMsg;
+                if (ex.message.includes("network connection error")) {
+                    errMsg = "Failed to connect to Dynamsoft License Server: network connection error. Check your Internet connection or contact Dynamsoft Support (support@dynamsoft.com) to acquire an offline license.";
+                } else {
+                    errMsg = ex.message||ex;
+                }
+                console.error(errMsg);
+                alert(errMsg);
             } finally {
                 pReading.style.display = 'none';
                 this.value = '';

diff --git a/1.hello-world/3.read-video-angular/src/app/barcode-scanner/barcode-scanner.component.ts b/1.hello-world/3.read-video-angular/src/app/barcode-scanner/barcode-scanner.component.ts
@@ -22,7 +22,14 @@ export class VideoDecodeComponent implements OnInit {
       };
       await scanner.open();
     } catch (ex) {
-      alert(ex);
+      let errMsg;
+      if (ex.message.includes("network connection error")) {
+        errMsg = "Failed to connect to Dynamsoft License Server: network connection error. Check your Internet connection or contact Dynamsoft Support (support@dynamsoft.com) to acquire an offline license.";
+      } else {
+        errMsg = ex.message||ex;
+      }
+      console.error(errMsg);
+      alert(errMsg);
     }
   }
   async ngOnDestroy() {

diff --git a/1.hello-world/3.read-video-angular/src/app/hello-world/hello-world.component.ts b/1.hello-world/3.read-video-angular/src/app/hello-world/hello-world.component.ts
@@ -15,7 +15,14 @@ export class HelloWorldComponent implements OnInit {
     try {
       await BarcodeScanner.loadWasm();
     } catch (ex) {
-      alert(ex.message);
+      let errMsg;
+      if (ex.message.includes("network connection error")) {
+        errMsg = "Failed to connect to Dynamsoft License Server: network connection error. Check your Internet connection or contact Dynamsoft Support (support@dynamsoft.com) to acquire an offline license.";
+      } else {
+        errMsg = ex.message||ex;
+      }
+      console.error(errMsg);
+      alert(errMsg);
     }
   }
   showScanner(): void {

diff --git a/1.hello-world/3.read-video-angular/src/app/img-decode/img-decode.component.ts b/1.hello-world/3.read-video-angular/src/app/img-decode/img-decode.component.ts
@@ -1,5 +1,5 @@
 import { Component, OnInit } from '@angular/core';
-import {BarcodeReader} from 'dynamsoft-javascript-barcode'
+import { BarcodeReader } from 'dynamsoft-javascript-barcode'
 
 @Component({
   selector: 'app-img-decode',
@@ -9,7 +9,7 @@ import {BarcodeReader} from 'dynamsoft-javascript-barcode'
 export class ImgDecodeComponent implements OnInit {
   pReader = null;
 
-  async ngOnInit(): Promise<void> {}
+  async ngOnInit(): Promise<void> { }
 
   decodeImg = async (e: any) => {
     try {
@@ -18,9 +18,16 @@ export class ImgDecodeComponent implements OnInit {
       for (const result of results) {
         alert(result.barcodeText);
       }
-      if(!results.length){ alert('No barcode found'); }
+      if (!results.length) { alert('No barcode found'); }
     } catch (ex) {
-      alert(ex);
+      let errMsg;
+      if (ex.message.includes("network connection error")) {
+        errMsg = "Failed to connect to Dynamsoft License Server: network connection error. Check your Internet connection or contact Dynamsoft Support (support@dynamsoft.com) to acquire an offline license.";
+      } else {
+        errMsg = ex.message||ex;
+      }
+      console.error(errMsg);
+      alert(errMsg);
     }
     e.target.value = '';
   }

diff --git a/1.hello-world/4.read-video-react/src/components/HelloWorld/HelloWorld.js b/1.hello-world/4.read-video-react/src/components/HelloWorld/HelloWorld.js
@@ -18,8 +18,14 @@ class HelloWorld extends React.Component {
         try {
             await BarcodeReader.loadWasm();
         } catch (ex) {
-            alert(ex);
-            throw ex;
+            let errMsg;
+            if (ex.message.includes("network connection error")) {
+                errMsg = "Failed to connect to Dynamsoft License Server: network connection error. Check your Internet connection or contact Dynamsoft Support (support@dynamsoft.com) to acquire an offline license.";
+            } else {
+                errMsg = ex.message||ex;
+            }
+            console.error(errMsg);
+            alert(errMsg);
         }
     }
 
@@ -36,14 +42,14 @@ class HelloWorld extends React.Component {
             bShowImgDecode: true
         });
     }
-    
+
     render() {
         return (
             <div className="helloWorld">
                 <h1>Hello World for React<img src={reactLogo} className="App-logo" alt="logo" /></h1>
                 <div className="btn-group">
-                    <button style={{marginRight: '10px', backgroundColor: this.state.bShowScanner ? 'rgb(255,174,55)' : 'white'}} onClick={this.showScanner}>Video Decode</button>
-                    <button style={{backgroundColor: this.state.bShowImgDecode ? 'rgb(255,174,55)' : 'white'}} onClick={this.showImgDecode}>Image Decode</button>
+                    <button style={{ marginRight: '10px', backgroundColor: this.state.bShowScanner ? 'rgb(255,174,55)' : 'white' }} onClick={this.showScanner}>Video Decode</button>
+                    <button style={{ backgroundColor: this.state.bShowImgDecode ? 'rgb(255,174,55)' : 'white' }} onClick={this.showImgDecode}>Image Decode</button>
                 </div>
                 <div className="container">
                     {this.state.bShowScanner ? (<VideoDecode></VideoDecode>) : ""}

diff --git a/1.hello-world/4.read-video-react/src/components/ImgDecode/ImgDecode.js b/1.hello-world/4.read-video-react/src/components/ImgDecode/ImgDecode.js
@@ -12,12 +12,19 @@ export default class ImgDecode extends Component {
     try {
       const reader = await (this.pReader = this.pReader || BarcodeReader.createInstance());
       let results = await reader.decode(e.target.files[0]);
-      for(let result of results){
+      for (let result of results) {
         alert(result.barcodeText);
       }
-      if(!results.length){ alert('No barcode found'); }
-    } catch(ex) {
-      alert(ex);
+      if (!results.length) { alert('No barcode found'); }
+    } catch (ex) {
+      let errMsg;
+      if (ex.message.includes("network connection error")) {
+        errMsg = "Failed to connect to Dynamsoft License Server: network connection error. Check your Internet connection or contact Dynamsoft Support (support@dynamsoft.com) to acquire an offline license.";
+      } else {
+        errMsg = ex.message||ex;
+      }
+      console.error(errMsg);
+      alert(errMsg);
     }
     e.target.value = '';
   }
@@ -31,7 +38,7 @@ export default class ImgDecode extends Component {
 
   render() {
     return (
-      <div className="ImgDecode"><input type="file" onChange={this.decodeImg}/></div>
+      <div className="ImgDecode"><input type="file" onChange={this.decodeImg} /></div>
     )
   }
 }
diff --git a/1.hello-world/4.read-video-react/src/components/VideoDecode/VideoDecode.js b/1.hello-world/4.read-video-react/src/components/VideoDecode/VideoDecode.js
diff --git a/1.hello-world/5.read-video-vue/src/components/HelloWorld.vue b/1.hello-world/5.read-video-vue/src/components/HelloWorld.vue
@@ -2,8 +2,10 @@
   <div class="helloWorld">
     <h1>Hello World for Vue<img class="applogo" alt="Vue logo" src="../assets/logo.png" /></h1>
     <div class="btn-group">
-        <button :style="{marginRight: '10px', backgroundColor: bShowScanner ? 'rgb(255,174,55)' : 'white'}" @click="showScanner">Video Decode</button>
-        <button :style="{backgroundColor: bShowImgDecode ? 'rgb(255,174,55)' : 'white'}"  @click="showImgDecode">Image Decode</button>
+      <button :style="{ marginRight: '10px', backgroundColor: bShowScanner ? 'rgb(255,174,55)' : 'white' }"
+        @click="showScanner">Video Decode</button>
+      <button :style="{ backgroundColor: bShowImgDecode ? 'rgb(255,174,55)' : 'white' }" @click="showImgDecode">Image
+        Decode</button>
     </div>
     <div class="container">
       <VideoDecode v-if="bShowScanner"></VideoDecode>
@@ -31,8 +33,14 @@ export default {
     try {
       await BarcodeReader.loadWasm();
     } catch (ex) {
-      alert(ex.message);
-      throw ex;
+      let errMsg;
+      if (ex.message.includes("network connection error")) {
+        errMsg = "Failed to connect to Dynamsoft License Server: network connection error. Check your Internet connection or contact Dynamsoft Support (support@dynamsoft.com) to acquire an offline license.";
+      } else {
+        errMsg = ex.message||ex;
+      }
+      console.error(errMsg);
+      alert(errMsg);
     }
   },
   components: {
@@ -61,15 +69,19 @@ ul {
   list-style-type: none;
   padding: 0;
 }
+
 li {
   margin: 0 10px;
 }
+
 a {
   color: #42b983;
 }
+
 .applogo {
   height: 25px;
 }
+
 .helloWorld {
   display: flex;
   flex-direction: column;

diff --git a/1.hello-world/5.read-video-vue/src/components/ImgDecode.vue b/1.hello-world/5.read-video-vue/src/components/ImgDecode.vue
@@ -1,5 +1,5 @@
 <template>
-  <div class="ImgDecode"><input type="file" @change="decodeImg"/></div>
+  <div class="ImgDecode"><input type="file" @change="decodeImg" /></div>
 </template>
 
 <script>
@@ -16,12 +16,19 @@ export default {
       try {
         const reader = await (this.pReader = this.pReader || BarcodeReader.createInstance());
         let results = await reader.decode(e.target.files[0]);
-        for(let result of results){
+        for (let result of results) {
           alert(result.barcodeText);
         }
-        if(!results.length){ alert('No barcode found'); }
-      } catch(ex) {
-        alert(ex);
+        if (!results.length) { alert('No barcode found'); }
+      } catch (ex) {
+        let errMsg;
+        if (ex.message.includes("network connection error")) {
+          errMsg = "Failed to connect to Dynamsoft License Server: network connection error. Check your Internet connection or contact Dynamsoft Support (support@dynamsoft.com) to acquire an offline license.";
+        } else {
+          errMsg = ex.message||ex;
+        }
+        console.error(errMsg);
+        alert(errMsg);
       }
       e.target.value = '';
     }
@@ -36,12 +43,12 @@ export default {
 </script>
 
 <style scoped>
-  .ImgDecode {
-    display: flex;
-    justify-content: center;
-    align-items: center;
-    width: 100%;
-    height: 90%;
-    border: 1px solid black
-  }
+.ImgDecode {
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  width: 100%;
+  height: 90%;
+  border: 1px solid black
+}
 </style>