离线考试：试卷下载通过api下载

src/features/OfflineExam/OfflineExamList.vue

@@ -130,6 +130,7 @@
 import { mapState as globalMapState, mapGetters } from "vuex";
 import { TK_SERVER_HTML_URL } from "@/constants/constants.js";
 import OfflineExamModal from "./OfflineExamModal.vue";
+import { downloadFileURL } from "@/utils/util";
 
 export default {
   name: "EcsOfflineList",
@@ -218,7 +219,7 @@ export default {
         window.location.href = url;
       }
     },
-    tempDisableBtnAndDownloadPaper(course) {
+    async tempDisableBtnAndDownloadPaper(course) {
       window._hmt.push(["_trackEvent", "离线考试页面", "下载试卷"]);
       this.downloadIds.add(course.examStudentId);
       this.downloadIds = new Set(this.downloadIds);
@@ -232,13 +233,29 @@ export default {
         // this.$forceUpdate();
       }, 10 * 1000);
 
-      window.location.href =
+      // window.location.href =
+      //   "/api/branch_ecs_ques/paper/export/" +
+      //   course.paperId +
+      //   "/PAPER/offLine?$key=" +
+      //   this.user.key +
+      //   "&$token=" +
+      //   this.user.token;
+      const res = await this.$http.get(
         "/api/branch_ecs_ques/paper/export/" +
-        course.paperId +
-        "/PAPER/offLine?$key=" +
-        this.user.key +
-        "&$token=" +
-        this.user.token;
+          course.paperId +
+          "/PAPER/offLine",
+        { responseType: "blob" }
+      );
+      console.log(res);
+      console.log(
+        "离线考试，下载试卷：名称：",
+        res.headers["content-disposition"]
+      );
+      const fileName = decodeURI(
+        res.headers["content-disposition"].match(/attachment;filename=(.*)/)[1]
+      );
+      const fileUrl = URL.createObjectURL(new Blob([res.data]));
+      downloadFileURL(fileUrl, fileName);
     },
     downloadingCourse(course) {
       return this.downloadIds.has(course.examStudentId);