注释掉自定义的service worker

serviceWorkerAppend.js

@@ -2,108 +2,108 @@
 // 以下为学生端添加内容
 console.log("sw printing before chrome58StopHere");
 var stop = true;
-(function() {
-  try {
-    Function("var a = {...{}};");
-    stop = false;
-  } catch (error) {
-    console.log(error);
-  }
-})();
+// (function() {
+//   try {
+//     Function("var a = {...{}};");
+//     stop = false;
+//   } catch (error) {
+//     console.log(error);
+//   }
+// })();
 console.log("sw printing after chrome58StopHere ", stop);
 
 // chrome 58 这个会报错，所以不执行
-if (!stop) {
-  self.addEventListener("fetch", event => {
-    // Prevent the default, and handle the request ourselves.
-    if (
-      event.request.url.startsWith(
-        "https://ecs-test-static.qmth.com.cn/comm-ques-bank/dev/audio"
-      ) ||
-      event.request.url.startsWith(
-        "https://ecs-static.qmth.com.cn/comm-ques-bank/prod/audio/"
-      )
-    ) {
-      event.respondWith(
-        (async function() {
-          // console.log("fetch intercepted");
-          // Try to get the response from a cache.
-          const cachedResponse = await caches.match(event.request);
-          // Return it if we found one.
-          if (cachedResponse) {
-            console.log("cache res", event.request.url);
-            return cachedResponse;
-          }
+// if (!stop) {
+//   self.addEventListener("fetch", event => {
+//     // Prevent the default, and handle the request ourselves.
+//     if (
+//       event.request.url.startsWith(
+//         "https://ecs-test-static.qmth.com.cn/comm-ques-bank/dev/audio"
+//       ) ||
+//       event.request.url.startsWith(
+//         "https://ecs-static.qmth.com.cn/comm-ques-bank/prod/audio/"
+//       )
+//     ) {
+//       event.respondWith(
+//         (async function() {
+//           // console.log("fetch intercepted");
+//           // Try to get the response from a cache.
+//           const cachedResponse = await caches.match(event.request);
+//           // Return it if we found one.
+//           if (cachedResponse) {
+//             console.log("cache res", event.request.url);
+//             return cachedResponse;
+//           }
 
-          console.log("fetch audio intercept, try to load all");
-          const res = await fetch(event.request.url);
+//           console.log("fetch audio intercept, try to load all");
+//           const res = await fetch(event.request.url);
 
-          const reader = res.body.getReader();
+//           const reader = res.body.getReader();
 
-          // Step 2: get total length
-          const contentLength = +res.headers.get("Content-Length");
+//           // Step 2: get total length
+//           const contentLength = +res.headers.get("Content-Length");
 
-          if (contentLength === 0) {
-            return fetch(event.request);
-          }
+//           if (contentLength === 0) {
+//             return fetch(event.request);
+//           }
 
-          // Step 3: read the data
-          let receivedLength = 0; // received that many bytes at the moment
-          let chunks = []; // array of received binary chunks (comprises the body)
-          // eslint-disable-next-line
-          while (true) {
-            const { done, value } = await reader.read();
+//           // Step 3: read the data
+//           let receivedLength = 0; // received that many bytes at the moment
+//           let chunks = []; // array of received binary chunks (comprises the body)
+//           // eslint-disable-next-line
+//           while (true) {
+//             const { done, value } = await reader.read();
 
-            if (done) {
-              break;
-            }
+//             if (done) {
+//               break;
+//             }
 
-            chunks.push(value);
-            receivedLength += value.length;
+//             chunks.push(value);
+//             receivedLength += value.length;
 
-            // console.log(`Received ${receivedLength} of ${contentLength}`);
+//             // console.log(`Received ${receivedLength} of ${contentLength}`);
 
-            self.clients.matchAll().then(function(clients) {
-              if (clients && clients.length) {
-                clients.forEach(function(client) {
-                  client.postMessage([
-                    event.request.url,
-                    receivedLength,
-                    contentLength,
-                  ]);
-                });
-              }
-            });
-          }
+//             self.clients.matchAll().then(function(clients) {
+//               if (clients && clients.length) {
+//                 clients.forEach(function(client) {
+//                   client.postMessage([
+//                     event.request.url,
+//                     receivedLength,
+//                     contentLength,
+//                   ]);
+//                 });
+//               }
+//             });
+//           }
 
-          // Step 4: concatenate chunks into single Uint8Array
-          // let chunksAll = new Uint8Array(receivedLength); // (4.1)
-          // let position = 0;
-          // for (let chunk of chunks) {
-          //   chunksAll.set(chunk, position); // (4.2)
-          //   position += chunk.length;
-          // }
+//           // Step 4: concatenate chunks into single Uint8Array
+//           // let chunksAll = new Uint8Array(receivedLength); // (4.1)
+//           // let position = 0;
+//           // for (let chunk of chunks) {
+//           //   chunksAll.set(chunk, position); // (4.2)
+//           //   position += chunk.length;
+//           // }
 
-          // const blob = await res.clone().blob();
-          // const blob = new Blob([chunksAll.buffer]);
-          const blob = new Blob(chunks);
-          const responseFinal = new Response(blob, {
-            headers: {
-              "Content-Type": "audio/mp3",
-              "Content-Length": contentLength,
-            },
-          });
+//           // const blob = await res.clone().blob();
+//           // const blob = new Blob([chunksAll.buffer]);
+//           const blob = new Blob(chunks);
+//           const responseFinal = new Response(blob, {
+//             headers: {
+//               "Content-Type": "audio/mp3",
+//               "Content-Length": contentLength,
+//             },
+//           });
 
-          caches.open("audios").then(function(cache) {
-            cache.put(event.request, responseFinal.clone());
-          });
+//           caches.open("audios").then(function(cache) {
+//             cache.put(event.request, responseFinal.clone());
+//           });
 
-          return responseFinal.clone();
-          // If we didn't find a match in the cache, use the network.
-          // return fetch(event.request);
-        })()
-      );
-    }
-  });
-}
+//           return responseFinal.clone();
+//           // If we didn't find a match in the cache, use the network.
+//           // return fetch(event.request);
+//         })()
+//       );
+//     }
+//   });
+// }
 console.log("sw printing end");