fix: 修复下载jtl过大导致oom的问题

backend/src/main/java/io/metersphere/base/mapper/ext/ExtFileContentMapper.java

@@ -0,0 +1,15 @@
+package io.metersphere.base.mapper.ext;
+
+import org.apache.ibatis.annotations.Param;
+import org.apache.ibatis.annotations.Select;
+
+import java.io.InputStream;
+
+public interface ExtFileContentMapper {
+    @Select(value = {
+            "SELECT file ",
+            "FROM file_content ",
+            "WHERE file_id = #{id, jdbcType=VARCHAR}"
+    })
+    InputStream selectZipBytes(@Param("id") String id);
+}

backend/src/main/java/io/metersphere/performance/controller/PerformanceReportController.java

@@ -16,9 +16,6 @@ import io.metersphere.performance.controller.request.ReportRequest;
 import io.metersphere.performance.service.ReportService;
 import org.apache.shiro.authz.annotation.Logical;
 import org.apache.shiro.authz.annotation.RequiresRoles;
-import org.springframework.http.HttpHeaders;
-import org.springframework.http.MediaType;
-import org.springframework.http.ResponseEntity;
 import org.springframework.web.bind.annotation.*;
 
 import javax.annotation.Resource;
@@ -137,11 +134,7 @@ public class PerformanceReportController {
     }
 
     @GetMapping("/jtl/download/{reportId}")
-    public ResponseEntity<byte[]> downloadJtl(@PathVariable String reportId) {
+    public void downloadJtlZip(@PathVariable String reportId, HttpServletResponse response) {
-        byte[] bytes = reportService.downloadJtl(reportId);
+        reportService.downloadJtlZip(reportId, response);
-        return ResponseEntity.ok()
-                .contentType(MediaType.parseMediaType("application/octet-stream"))
-                .header(HttpHeaders.CONTENT_DISPOSITION, "attachment; filename=\"" + reportId + ".jtl\"")
-                .body(bytes);
     }
 }

backend/src/main/java/io/metersphere/performance/service/ReportService.java

@@ -4,6 +4,7 @@ import com.alibaba.fastjson.JSON;
 import com.alibaba.fastjson.JSONObject;
 import io.metersphere.base.domain.*;
 import io.metersphere.base.mapper.*;
+import io.metersphere.base.mapper.ext.ExtFileContentMapper;
 import io.metersphere.base.mapper.ext.ExtLoadTestReportMapper;
 import io.metersphere.commons.constants.PerformanceTestStatus;
 import io.metersphere.commons.constants.ReportKeys;
@@ -23,11 +24,15 @@ import io.metersphere.performance.engine.EngineFactory;
 import io.metersphere.service.FileService;
 import io.metersphere.service.TestResourceService;
 import org.apache.commons.lang3.StringUtils;
+import org.apache.ibatis.session.SqlSession;
+import org.apache.ibatis.session.SqlSessionFactory;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
 import javax.annotation.Resource;
+import javax.servlet.ServletOutputStream;
 import javax.servlet.http.HttpServletResponse;
+import java.io.InputStream;
 import java.io.OutputStream;
 import java.util.ArrayList;
 import java.util.List;
@@ -52,6 +57,8 @@ public class ReportService {
     private LoadTestReportDetailMapper loadTestReportDetailMapper;
     @Resource
     private FileService fileService;
+    @Resource
+    private SqlSessionFactory sqlSessionFactory;
 
     public List<ReportDTO> getRecentReportList(ReportRequest request) {
         List<OrderRequest> orders = new ArrayList<>();
@@ -284,11 +291,28 @@ public class ReportService {
         return JSON.parseArray(content, ChartsData.class);
     }
 
-    public byte[] downloadJtl(String reportId) {
+    /**
+     * 流下载 jtl zip
+     */
+    public void downloadJtlZip(String reportId, HttpServletResponse response) {
         LoadTestReportWithBLOBs report = getReport(reportId);
         if (StringUtils.isBlank(report.getFileId())) {
             throw new RuntimeException(Translator.get("load_test_report_file_not_exist"));
         }
-        return fileService.loadFileAsBytes(report.getFileId());
+        response.setHeader("Content-Disposition", "attachment;fileName=" + reportId + ".zip");
+        try (SqlSession sqlSession = sqlSessionFactory.openSession()) {
+            ExtFileContentMapper mapper = sqlSession.getMapper(ExtFileContentMapper.class);
+            try (InputStream inputStream = mapper.selectZipBytes(report.getFileId())) {
+                ServletOutputStream outputStream = response.getOutputStream();
+                byte[] buffer = new byte[1024 * 4];
+                int read;
+                while ((read = inputStream.read(buffer)) > -1) {
+                    outputStream.write(buffer, 0, read);
+                }
+            } catch (Exception e) {
+                LogUtil.error(e);
+                MSException.throwException(e);
+            }
+        }
     }
 }

frontend/src/business/components/performance/report/PerformanceReportView.vue

@@ -293,12 +293,12 @@ export default {
       };
       this.result = this.$request(config).then(response => {
         const content = response.data;
-        const blob = new Blob([content]);
+        const blob = new Blob([content], {type: "application/octet-stream"});
         if ("download" in document.createElement("a")) {
           // 非IE下载
           //  chrome/firefox
           let aTag = document.createElement('a');
-          aTag.download = this.reportId + ".jtl";
+          aTag.download = this.reportId + ".zip";
           aTag.href = URL.createObjectURL(blob);
           aTag.click();
           URL.revokeObjectURL(aTag.href)