处理文件流

const exportContent = (url, data, fileName) => {
  let token = localStorage.getItem("token");
  axios.defaults.headers.common["Authorization"] = `Bearer ${token}`;
  axios
    .post(url, data, {
      responseType: "blob", //设置返回类型
    })
    .then((res) => {
      const link = document.createElement("a");
      try {
        let blob = new Blob([res.data], { type: "application/vnd.ms-excel" });
        console.log(res.headers);
        let _fileName = fileName;
        link.style.display = "none";
        const url = window.URL || window.webkitURL || window.moxURL;
        link.href = url.createObjectURL(blob);
        link.setAttribute(
          "download",
          _fileName.substring(_fileName.lastIndexOf("_") + 1)
        );
        link.click();
        document.body.removeChild(link);
        url.revokeObjectURL(link.href);
      } catch (e) {
        console.log("下载的文件出错", e);
      }
    })
    .catch((err) => {
      console.log("请求出错", err.response.data.error);
    });
};

抛出错误的情况

const exportContent = (url, data, fileName) => {
  let token = localStorage.getItem("token");
  // axios.defaults.headers.common["Authorization"] = `Bearer ${token}`;
  axios
    .post(import.meta.env.VITE_ENV + url, data, {
      responseType: "blob", //设置返回类型
      headers: {
        Authorization: `Bearer ${token}`,
      },
    })
    .then((res) => {
      const link = document.createElement("a");
      res.data.text().then((res1) => {
        try {
          let temp = JSON.parse(res1);
          ElMessage.error(temp.Message);
          allLoading.value = false;
        } catch (error) {
          console.log(error);
          try {
            let blob = new Blob([res.data], {
              type: "application/vnd.ms-excel",
            });
            console.log(res.headers);
            let _fileName = fileName;
            link.style.display = "none";
            const url = window.URL || window.webkitURL || window.moxURL;
            link.href = url.createObjectURL(blob);
            link.setAttribute(
              "download",
              _fileName.substring(_fileName.lastIndexOf("_") + 1)
            );
            link.click();
            document.body.removeChild(link);
            url.revokeObjectURL(link.href);
            allLoading.value = false;
          } catch (e) {
            console.log("下载的文件出错", e);
          }
        }
      });
    })
    .catch((err) => {
      console.log("请求出错", err.response.data.error);
    });
};