Question

我需要上传一个文件并将其发送到Node后端。由于我以前从未使用过上传和发送文件，这对我来说有点麻烦。

到目前为止，我发现了这个：

// this creates a React component that can be used in other components or
// used directly on the page with React.renderComponent
var FileForm = React.createClass({

  // since we are starting off without any data, there is no initial value
  getInitialState: function() {
    return {
      data_uri: null,
    };
  },

  // prevent form from submitting; we are going to capture the file contents
  handleSubmit: function(e) {
    e.preventDefault();
  },

  // when a file is passed to the input field, retrieve the contents as a
  // base64-encoded data URI and save it to the component's state
  handleFile: function(e) {
    var self = this;
    var reader = new FileReader();
    var file = e.target.files[0];

    reader.onload = function(upload) {
      self.setState({
        data_uri: upload.target.result,
      });
    }

    reader.readAsDataURL(file);
  },

  // return the structure to display and bind the onChange, onSubmit handlers
  render: function() {
    // since JSX is case sensitive, be sure to use 'encType'
    return (
      <form onSubmit={this.handleSubmit} encType="multipart/form-data">
        <input type="file" onChange={this.handleFile} />
      </form>
    );
  },
});

来源：https://fitacular.com/blog/react/2014/06/23/react-file-upload-base64/

但现在我基本上只是结束了某种字符串。但我需要通过REST将该文件发送到我的Express后端，后端需要将该文件保存在CouchDB中。

实现这一目标的最佳/最简单方法是什么？

Answer 1

如果您使用正文解析器，请知道它处理json和url编码的表单，而不是多部分数据！你应该使用其他模块。有关更多信息，请查看：File uploading with Express 4.0: req.files undefined

上传文件并使用React和Node将其发送到后端

1 个答案: