fix(测试跟踪): 用例中包含超长文本导出内容为空

--bug=1024670 --user=陈建星 【测试跟踪】功能用例-全选所有页-导出excel文件-文件为空 https://www.tapd.cn/55049933/s/1353684

framework/sdk-parent/frontend/src/plugins/request.js

@@ -225,10 +225,17 @@ export function downloadFile(method, url, data, fileName, processHandler) {
         fileName = fileName.replaceAll("\"", "");
         _downloadFile(fileName, res.data);
         resolve();
-      })
-      .catch((e) => {
-        $error(e.message);
-        reject(e);
+      }).catch((e) => {
+        // 报错后，将 blob 格式转成字符串，打印错误信息
+        let reader = new FileReader();
+        reader.readAsText(e.response.data, 'utf-8');
+        reader.onload = function (e) {
+          if (reader.result) {
+            let info = JSON.parse(reader.result);
+            reject(info);
+            $error(info.message);
+          }
+        }
       });
   });
 }

test-track/backend/src/main/java/io/metersphere/service/TestCaseService.java

@@ -1724,6 +1724,7 @@ public class TestCaseService {
             buildExportCustomField(customSelectValueMap, customNameMap, t, data, textFields);
             buildExportOtherField(data, t, otherHeaders);
 
+            this.validateExportTextField(t);
             if (CollectionUtils.isNotEmpty(stepDescList)) {
                 // 如果有多条步骤则添加多条数据，之后合并单元格
                 buildExportMergeData(rowMergeInfo, list, stepDescList, stepResultList, data);
@@ -1734,6 +1735,21 @@ public class TestCaseService {
         return list;
     }
 
+    private void validateExportTextField(TestCaseDTO data) {
+        List<String> textValues= Arrays.asList(data.getPrerequisite(), data.getStepDescription(), data.getExpectedResult(), data.getRemark());
+        for (String textValue : textValues) {
+            validateExportText(data.getName(), textValue);
+        }
+    }
+
+    private void validateExportText(String name, String textValue) {
+        // poi 导出的单个单元格最大字符数量为 32767 ，这里添加校验提示
+        int maxLength = 32767;
+        if (textValue.length() > maxLength) {
+            MSException.throwException(String.format(Translator.get("case_export_text_validate_tip"), name, maxLength));
+        }
+    }
+
     private void buildExportOtherField(TestCaseExcelData data, TestCaseDTO t, List<TestCaseExportRequest.TestCaseExportHeader> otherHeaders) {
         if (CollectionUtils.isEmpty(otherHeaders)) {
             return;
@@ -1800,6 +1816,7 @@ public class TestCaseService {
                 String id = field.getFieldId();
                 if (textFields.contains(id)) {
                     map.put(customNameMap.get(id), field.getTextValue());
+                    this.validateExportText(data.getName(), field.getTextValue());
                     continue;
                 }
                 if (StringUtils.isNotBlank(field.getValue())) {

test-track/backend/src/main/resources/i18n/messages_en_US.properties

@@ -230,4 +230,5 @@ test_case_review_status_re_review=ReReview
 api_status_fake_error=FakeError
 serial=Serial
 parallel=Parallel
-rerun_warning=The connection is abnormal, please check the environment configuration
+rerun_warning=The connection is abnormal, please check the environment configuration
+case_export_text_validate_tip=Use case %s contains extremely long text, currently supported up to %s!

test-track/backend/src/main/resources/i18n/messages_zh_CN.properties

@@ -202,3 +202,4 @@ api_status_fake_error=误报
 serial=串行
 parallel=并行
 rerun_warning=连接异常，请检查环境配置
+case_export_text_validate_tip=用例 %s 包含超长文本，目前支持最大长度为 %s ！

test-track/backend/src/main/resources/i18n/messages_zh_TW.properties

@@ -202,3 +202,4 @@ api_status_fake_error=誤報
 serial=串行
 parallel=並行
 rerun_warning=連接異常，請檢查環境配置
+case_export_text_validate_tip=用例 %s 包含超長文本，目前支持最大長度為 %s ！

test-track/frontend/src/business/case/components/TestCaseList.vue

@@ -314,6 +314,7 @@ import TestCaseReviewStatusTableItem from "@/business/common/tableItems/TestCase
 import RelateDemand from "@/business/case/components/RelateDemand";
 import TestPlanCaseStatusTableItem from "@/business/common/tableItems/TestPlanCaseStatusTableItem";
 import {
+  fileDownloadPost,
   generateColumnKey,
   getCustomFieldValueForTrack,
   getProjectMemberOption
@@ -1052,45 +1053,26 @@ export default {
       }
       let param = buildBatchParam(this, this.$refs.table.selectIds);
       Object.assign(param, fieldParam);
-      let config = {};
-      let fileNameSuffix = "";
+      let fileNameSuffix;
+      let url;
       if (exportType === 'xmind') {
-        config = {
-          url: '/test/case/export/testcase/xmind',
-          method: 'post',
-          responseType: 'blob',
-          data: param
-        };
+        url = '/test/case/export/testcase/xmind';
         fileNameSuffix = ".xmind";
       } else {
-        config = {
-          url: '/test/case/export/testcase',
-          method: 'post',
-          responseType: 'blob',
-          data: param
-        };
+        url = '/test/case/export/testcase'
         fileNameSuffix = ".xlsx";
       }
       this.loading = true;
       store.isTestCaseExporting = true;
-
-      this.$request(config).then(response => {
-        this.loading = false;
-        const filename = "Metersphere_case_" + this.projectName + fileNameSuffix;
-        const blob = new Blob([response.data]);
-        if ("download" in document.createElement("a")) {
-          let aTag = document.createElement('a');
-          aTag.download = filename;
-          aTag.href = URL.createObjectURL(blob);
-          aTag.click();
-          URL.revokeObjectURL(aTag.href);
+      fileDownloadPost(url, param, "Metersphere_case_" + this.projectName + fileNameSuffix)
+        .then(() => {
+          this.loading = false;
           this.$emit('closeExport');
-        } else {
-          navigator.msSaveBlob(blob, filename);
-          this.$emit('closeExport');
-        }
-        store.isTestCaseExporting = false;
-      });
+          store.isTestCaseExporting = false;
+        }).catch(() => {
+          this.loading = false;
+          store.isTestCaseExporting = false;
+        });
     },
     batchEdit(form) {
       let ids = this.$refs.table.selectIds;