一、接口返回的数据流格式

二. 方法实现

1. image 图片类型

<img :src="imageUrl" alt="" srcset="" />

async getData() {
  const res = await axios.post(
    "/project/download",
    {
      // params
      id: "",
    },
    {
      responseType: "blob",
      transformResponse: [
        async (data) => {
          return await this.transformData(data);
        },
      ],
    }
  );
  let blob = new Blob([res.data], { type: "image/jpeg" });
  // 图片url地址
  this.imageUrl = URL.createObjectURL(blob);
},

2. txt 文件类型

<div>{{ txtContent }}</div>

async getData() {
  const res = await axios.post(
    "/project/download",
    {
      // params
      id: "",
    },
    {
      responseType: "blob",
      transformResponse: [
        async (data) => {
          return await this.transformData(data);
        },
      ],
    }
  );
  res.data.then((data) => {
    // 文件信息
    this.txtContent = data;
  });
},

transformData(data) {
  return new Promise((resolve) => {
    let reader = new FileReader();
    reader.readAsText(data, "UTF-8");
    reader.onload = () => {
      resolve(reader.result);
    };
  });
},

3. pdf 文件类型

<iframe
  :src="pdfUrl"
  frameborder="0"
  style="background-color: white"
  allowTransparency="true"
  height="100%"
  width="100%"
></iframe>

async getData() {
  const res = await axios.post(
    "/project/download",
    {
      // params
      id: "",
    },
    {
      responseType: "blob",
      headers: {
        "Content-Type": "application/pdf;charset=UTF-8",
      },
    }
  );
  let blob = new Blob([res.data], { type: "application/pdf" });
  const url = URL.createObjectURL(blob);
  // pdf url地址
  this.pdfUrl = url;
},