axios获取请求未收到数据答案

【问题标题】：Axios get Request not receiving dataaxios获取请求未收到数据
【发布时间】：2021-10-21 07:33:21
【问题描述】：

我正在尝试下载我的 s3 存储桶的内容，当我点击 API 端点时，数据显示在我的 Intellij 控制台中，但在我的邮递员和浏览器控制台中，我只是得到一个空对象。

为什么我应该在 Axios 请求中收到这个？

Axios -

downloadLocations() {
  axios.get("http://localhost:8080/api/v1/targetLocation/downloadSearchData")
      .then((res) => {
        console.log(res.data)

        // We will need to retrieve the data into a downloadable blob
        // const  content = new Blob([JSON.stringify(???)],{ type: 'text/plain;charset=utf-8' })
        // const fileName = `test.txt`
        // saveAs(content, fileName)
      }, (error) => {
        console.log(error);
      });
}

服务-

public ByteArrayOutputStream downloadSearchData() throws IOException {
    BasicAWSCredentials awsCredentials = new BasicAWSCredentials(awsAccessKey, awsSecretKey);
    AmazonS3 s3client = AmazonS3ClientBuilder
            .standard()
            .withCredentials(new AWSStaticCredentialsProvider(awsCredentials))
            .withRegion(awsRegion)
            .build();

    var s3Object = s3client.getObject("downloadable-cases", "7863784198_2021-08-16T13_30_06.690Z.json");
    var out = new ByteArrayOutputStream();
    try (var in = s3Object.getObjectContent()) {
        in.transferTo(out);
    }
    System.out.println(out);
    return out;
}

控制器 -

@GetMapping(value = "downloadSearchData")
public ByteArrayOutputStream downloadSearchData() throws IOException {
    return targetLocationService.downloadSearchData();
}

【问题讨论】：

标签： javascript java spring-boot amazon-s3 axios

【解决方案1】：

好的，我找到了答案。我将 Service 和 Controller 返回值更改为 String，现在它可以正常工作了

public String downloadSearchData() throws IOException {
    BasicAWSCredentials awsCredentials = new BasicAWSCredentials(awsAccessKey, awsSecretKey);
    AmazonS3 s3client = AmazonS3ClientBuilder
            .standard()
            .withCredentials(new AWSStaticCredentialsProvider(awsCredentials))
            .withRegion(Regions.GovCloud)
            .build();

    var s3Object = s3client.getObject("downloadable-cases", "7863784198_2021-08-16T13_30_06.690Z.json");
    var out = new ByteArrayOutputStream();
    try (var in = s3Object.getObjectContent()) {
        in.transferTo(out);
    }
    return out.toString();
}

【讨论】：