javascript - POST 要求每个请求只上传一个文件

Question

我正在使用nestjs，我想上传到亚马逊s3，但每个请求都失败，错误是:
POST 要求每个请求只上传一个文件

这是我的代码实现:

const formData = new FormData();
formData.append('policy', clientPayload.policy);
formData.append('key', clientPayload.key);
formData.append('x-amz-signature', clientPayload['x-amz-signature']);
formData.append('x-amz-algorithm', clientPayload['x-amz-algorithm']);
formData.append('x-amz-date', clientPayload['x-amz-date']);
formData.append('x-amz-credential', clientPayload['x-amz-credential']);
formData.append('success_action_status', '201');
formData.append('success_action_redirect', '');
formData.append('file', file.path);

try {
  const data = await this.http
    .post(AppConfig.awsServices.bucketUrl, formData, {
      headers: {
        'content-type':
          'multipart/form-data; boundary=----WebKitFormBoundary7MA4YWxkTrZu0gW',
      },
    })
    .toPromise();

这是响应:

data: '<?xml version="1.0" encoding="UTF-8"?>\n' +
  '<Error><Code>InvalidArgument</Code><Message>POST requires exactly one file upload per request.</Message><ArgumentName>file</ArgumentName><ArgumentValue>0</ArgumentValue><RequestId>D602243726B03B53</RequestId><HostId>qjLwo8jak8yb3iWOXp4fbqAw391MW7d/3/9r8AzqA20hAvYd1Kgj0PJIAEv+v9sMckixT9WtUoA=</HostId></Error>'

这里还有图片附件:

这是我试图从文档实现的请求:

https://dev.vdocipher.com/api/docs/book/upload/file.html

Answer 1

看起来您实际上并没有上传文件，只是传递了文件的路径。将其更改为类似以下内容:

const formData = new FormData();
// your .append() calls here
// instead of formData.append('file', file.path);
form.append('file', fs.createReadStream('path-to-file'));

也不要手动指定内容类型 header ，httpService 应该处理这一点:

 const data = await this.http
    .post(AppConfig.awsServices.bucketUrl, formData, { headers: { ...formData.getHeaders() })
    .toPromise();