使用Axios从NodeJS后端到VueJ的空响应

Question

我有一个API，可将图像转换为gcode文件，以及将文件存储和移动到适当的目录。
如果图像尺寸较大，则该过程可能会花费大量时间（有时会超过3m），如果是大图像，则在调用API并完成操作后，我得到 net的信息： ：虽然我没有在端点代码中发送任何空响应，并且超时是axios的默认值（= 0），但我的axios.post（）调用中却是：ERR_EMPTY_RESPONSE 。
express或axios是否缺少配置？
我是否缺少有关API的内容？
帮助！
注意：
所有操作均在端点中成功执行，仅响应发送为空！

router.post('/convert', upload.single('image'), (req, res) => {
//? req.file {fieldname, originalname, encoding, mimetype, buffer}
const fileObject = req.file;
let results = null;
const params = req.body.parameters;
filesHandler.moveImage(fileObject.path, fileObject.filename)
    .then((newPath) => {
        controller.defaultImageConversion(newPath, params)
            .then((data) => {
                results = data;
                //? filename ex 2019-02-24T16:25:36.772Z.gcode
                const splitted = fileObject.filename.split(".");
                //? splitted[0] + "." + splitted[1] => 2019-02-24T16:25:36 + 772Z
                const fileName = splitted[0] + "." + splitted[1] + ".gcode";
                filesHandler.moveDotGcode(data.dirgcode, fileName)
                    .then((result) => {
                        const tt = new Date(Date.now());
                        const endTime = `${tt.getHours()}:${tt.getMinutes()}:${tt.getSeconds()}`;
                        const {
                            toolDiameter,
                            sensitivity,
                            scaleAxes,
                            deepStep,
                            whiteZ,
                            blackZ,
                            safeZ,
                            feedrate,
                            errBlackPixel,
                            time,
                            imgSize
                        } = results.config;
                        const t = new Date(time);
                        const startTime = `${t.getHours()}:${t.getMinutes()}:${t.getSeconds()}`;
                        controller.storeConversionDetails({
                            image: fileObject.filename,
                            gcode: fileName,
                            toolDiameter,
                            sensitivity,
                            scaleAxes,
                            deepStep,
                            whiteZ,
                            blackZ,
                            safeZ,
                            feedrate,
                            time,
                            errBlackPixel,
                            imgSize
                        }).then((result) => {
                            filesHandler.getGCodeFileStats(fileName)
                                .then((result) => {
                                    let size = result.size;
                                    // console.log();
                                    res.send({
                                        success: "Operation Completed Successfully, Image Conversion is Done",
                                        data: {
                                            toolDiameter,
                                            sensitivity,
                                            scaleAxes,
                                            deepStep,
                                            whiteZ,
                                            blackZ,
                                            safeZ,
                                            feedrate,
                                            errBlackPixel,
                                            imgSize,
                                            startTime,
                                            endTime,
                                            elapsedTime: (tt - t) * 0.001,
                                            fileName: fileName,
                                            size: size
                                        }
                                    });
                                }).catch((error) => {
                                    console.log(error);
                                    res.status(500).send({
                                        failure: "Internal error occurred while getting file stats",
                                        error
                                    });
                                });
                        }).catch((error) => {
                            console.log(error);
                            res.status(500).send({
                                failure: "Internal error occurred while storing data into Database",
                                error
                            });
                        });
                    }).catch((error) => {
                        res.status(500).send({
                            failure: "Internal error occurred while moving gcode to directory",
                            error
                        });
                    });
            }).catch((error) => {
                res.status(500).send({
                    failure: "Internal error occurred while converting image, try again",
                    error
                });
            });
    }).catch((error) => {
        res.status(500).send({
            failure: "Internal error occurred, try again",
            error
        });
    });

}）;