Upload 上传

文件选择上传和拖拽上传控件。

何时使用

上传是将信息（网页、文字、图片、视频等）通过网页或者上传工具发布到远程服务器上的过程。

当需要上传一个或一些文件时。
当需要展现上传的进度时。
当需要使用拖拽交互时。

代码演示

点击上传

经典款式，用户点击按钮弹出文件选择框。

import { Upload, message, Button, Icon } from 'choerodon-ui';

const props = {
  name: 'file',
  action: '//jsonplaceholder.typicode.com/posts/',
  headers: {
    authorization: 'authorization-text',
  },
  onChange(info) {
    if (info.file.status !== 'uploading') {
      console.log(info.file, info.fileList);
    }
    if (info.file.status === 'done') {
      message.success(`${info.file.name} file uploaded successfully`);
    } else if (info.file.status === 'error') {
      message.error(`${info.file.name} file upload failed.`);
    }
  },
};

ReactDOM.render(
  <Upload {...props}>
    <Button>
      <Icon type="file_upload" /> Click to Upload
    </Button>
  </Upload>,
  mountNode);

已上传的文件列表

使用 defaultFileList 设置已上传的内容。

import { Upload, Button, Icon } from 'choerodon-ui';

const props = {
  action: '//jsonplaceholder.typicode.com/posts/',
  onChange({ file, fileList }) {
    if (file.status !== 'uploading') {
      console.log(file, fileList);
    }
  },
  defaultFileList: [{
    uid: 1,
    name: 'xxx.png',
    status: 'done',
    reponse: 'Server Error 500', // custom error message to show
    url: 'http://www.baidu.com/xxx.png',
  }, {
    uid: 2,
    name: 'yyy.png',
    status: 'done',
    url: 'http://www.baidu.com/yyy.png',
  }, {
    uid: 3,
    name: 'zzz.png',
    status: 'error',
    reponse: 'Server Error 500', // custom error message to show
    url: 'http://www.baidu.com/zzz.png',
  }],
};

ReactDOM.render(
  <Upload {...props}>
    <Button>
      <Icon type="file_upload" /> Upload
    </Button>
  </Upload>,
  mountNode);

完全控制的上传列表

使用 fileList 对列表进行完全控制，可以实现各种自定义功能，以下演示三种情况：

1) 上传列表数量的限制。

2) 读取远程路径并显示链接。

3) 按照服务器返回信息筛选成功上传的文件。

import { Upload, Button, Icon } from 'choerodon-ui';

class MyUpload extends React.Component {
  state = {
    fileList: [{
      uid: -1,
      name: 'xxx.png',
      status: 'done',
      url: 'http://www.baidu.com/xxx.png',
    }],
  }

  handleChange = (info) => {
    let fileList = info.fileList;

    // 1. Limit the number of uploaded files
    //    Only to show two recent uploaded files, and old ones will be replaced by the new
    fileList = fileList.slice(-2);

    // 2. read from response and show file link
    fileList = fileList.map((file) => {
      if (file.response) {
        // Component will show file.url as link
        file.url = file.response.url;
      }
      return file;
    });

    // 3. filter successfully uploaded files according to response from server
    fileList = fileList.filter((file) => {
      if (file.response) {
        return file.response.status === 'success';
      }
      return true;
    });

    this.setState({ fileList });
  }

  render() {
    const props = {
      action: '//jsonplaceholder.typicode.com/posts/',
      onChange: this.handleChange,
      multiple: true,
    };
    return (
      <Upload {...props} fileList={this.state.fileList}>
        <Button>
          <Icon type="file_upload" /> upload
        </Button>
      </Upload>
    );
  }
}

ReactDOM.render(<MyUpload />, mountNode);

图片列表样式

上传文件为图片，可展示本地缩略图。IE8/9 不支持浏览器本地缩略图展示（Ref），可以写 thumbUrl 属性来代替。

import { Upload, Button, Icon } from 'choerodon-ui';

const fileList = [{
  uid: -1,
  name: 'xxx.png',
  status: 'done',
  url: 'https://zos.alipayobjects.com/rmsportal/jkjgkEfvpUPVyRjUImniVslZfWPnJuuZ.png',
  thumbUrl: 'https://zos.alipayobjects.com/rmsportal/jkjgkEfvpUPVyRjUImniVslZfWPnJuuZ.png',
}, {
  uid: -2,
  name: 'yyy.png',
  status: 'done',
  url: 'https://zos.alipayobjects.com/rmsportal/jkjgkEfvpUPVyRjUImniVslZfWPnJuuZ.png',
  thumbUrl: 'https://zos.alipayobjects.com/rmsportal/jkjgkEfvpUPVyRjUImniVslZfWPnJuuZ.png',
}];

const props = {
  action: '//jsonplaceholder.typicode.com/posts/',
  listType: 'picture',
  defaultFileList: [...fileList],
};

const props2 = {
  action: '//jsonplaceholder.typicode.com/posts/',
  listType: 'picture',
  defaultFileList: [...fileList],
  className: 'upload-list-inline',
};

ReactDOM.render(
  <div>
    <Upload {...props}>
      <Button>
        <Icon type="file_upload" /> upload
      </Button>
    </Upload>
    <br />
    <br />
    <Upload {...props2}>
      <Button>
        <Icon type="file_upload" /> upload
      </Button>
    </Upload>
  </div>,
  mountNode);

用户头像

点击上传用户头像，并使用 beforeUpload 限制用户上传的图片格式和大小。

beforeUpload 的返回值可以是一个 Promise 以支持也支持异步检查：示例。

import { Upload, Icon, message } from 'choerodon-ui';

function getBase64(img, callback) {
  const reader = new FileReader();
  reader.addEventListener('load', () => callback(reader.result));
  reader.readAsDataURL(img);
}

function beforeUpload(file) {
  const isJPG = file.type === 'image/jpeg';
  if (!isJPG) {
    message.error('You can only upload JPG file!');
  }
  const isLt2M = file.size / 1024 / 1024 < 2;
  if (!isLt2M) {
    message.error('Image must smaller than 2MB!');
  }
  return isJPG && isLt2M;
}

class Avatar extends React.Component {
  state = {
    loading: false,
  }

  handleChange = (info) => {
    if (info.file.status === 'uploading') {
      this.setState({ loading: true });
      return;
    }
    if (info.file.status === 'done') {
      // Get this url from response in real world.
      getBase64(info.file.originFileObj, imageUrl => this.setState({
        imageUrl,
        loading: false,
      }));
    }
  }

  render() {
    const uploadButton = (
      <div>
        <Icon type={this.state.loading ? 'loading' : 'add'} />
        <div className="ant-upload-text">Upload</div>
      </div>
    );
    const imageUrl = this.state.imageUrl;
    return (
      <Upload
        name="avatar"
        listType="picture-card"
        className="avatar-uploader"
        showUploadList={false}
        action="//jsonplaceholder.typicode.com/posts/"
        beforeUpload={beforeUpload}
        onChange={this.handleChange}
      >
        {imageUrl ? <img src={imageUrl} alt="" /> : uploadButton}
      </Upload>
    );
  }
}

ReactDOM.render(<Avatar />, mountNode);

用户头像

用户可以上传图片并在列表中显示缩略图。当上传照片数到达限制后，上传按钮消失。

import { Upload, Icon, Modal } from 'choerodon-ui';

class PicturesWall extends React.Component {
  state = {
    previewVisible: false,
    previewImage: '',
    fileList: [{
      uid: -1,
      name: 'xxx.png',
      status: 'done',
      url: 'https://zos.alipayobjects.com/rmsportal/jkjgkEfvpUPVyRjUImniVslZfWPnJuuZ.png',
    }],
  };

  handleCancel = () => this.setState({ previewVisible: false })

  handlePreview = (file) => {
    this.setState({
      previewImage: file.url || file.thumbUrl,
      previewVisible: true,
    });
  }

  handleChange = ({ fileList }) => this.setState({ fileList })

  render() {
    const { previewVisible, previewImage, fileList } = this.state;
    const uploadButton = (
      <div>
        <Icon type="add" />
        <div className="ant-upload-text">Upload</div>
      </div>
    );
    return (
      <div className="clearfix">
        <Upload
          action="//jsonplaceholder.typicode.com/posts/"
          listType="picture-card"
          fileList={fileList}
          onPreview={this.handlePreview}
          onChange={this.handleChange}
        >
          {fileList.length >= 3 ? null : uploadButton}
        </Upload>
        <Modal visible={previewVisible} footer={null} onCancel={this.handleCancel}>
          <img alt="example" style={{ width: '100%' }} src={previewImage} />
        </Modal>
      </div>
    );
  }
}

ReactDOM.render(<PicturesWall />, mountNode);

拖拽上传

把文件拖入指定区域，完成上传，同样支持点击上传。

设置 multiple 后，在 IE10+ 可以一次上传多个文件。

import { Upload, Icon, message } from 'choerodon-ui';
const Dragger = Upload.Dragger;

const props = {
  name: 'file',
  multiple: true,
  action: '//jsonplaceholder.typicode.com/posts/',
  onChange(info) {
    const status = info.file.status;
    if (status !== 'uploading') {
      console.log(info.file, info.fileList);
    }
    if (status === 'done') {
      message.success(`${info.file.name} file uploaded successfully.`);
    } else if (status === 'error') {
      message.error(`${info.file.name} file upload failed.`);
    }
  },
};

ReactDOM.render(
  <Dragger {...props}>
    <p className="ant-upload-drag-icon">
      <Icon type="inbox" />
    </p>
    <p className="ant-upload-text">Click or drag file to this area to upload</p>
    <p className="ant-upload-hint">Support for a single or bulk upload. Strictly prohibit from uploading company data or other band files</p>
  </Dragger>,
  mountNode);

手动上传

beforeUpload 返回 false 后，手动上传文件。

import { Upload, Button, Icon, message } from 'choerodon-ui';
import reqwest from 'reqwest';

class Demo extends React.Component {
  state = {
    fileList: [],
    uploading: false,
  }

  handleUpload = () => {
    const { fileList } = this.state;
    const formData = new FormData();
    fileList.forEach((file) => {
      formData.append('files[]', file);
    });

    this.setState({
      uploading: true,
    });

    // You can use any AJAX library you like
    reqwest({
      url: '//jsonplaceholder.typicode.com/posts/',
      method: 'post',
      processData: false,
      data: formData,
      success: () => {
        this.setState({
          fileList: [],
          uploading: false,
        });
        message.success('upload successfully.');
      },
      error: () => {
        this.setState({
          uploading: false,
        });
        message.error('upload failed.');
      },
    });
  }

  render() {
    const { uploading } = this.state;
    const props = {
      action: '//jsonplaceholder.typicode.com/posts/',
      onRemove: (file) => {
        this.setState(({ fileList }) => {
          const index = fileList.indexOf(file);
          const newFileList = fileList.slice();
          newFileList.splice(index, 1);
          return {
            fileList: newFileList,
          };
        });
      },
      beforeUpload: (file) => {
        this.setState(({ fileList }) => ({
          fileList: [...fileList, file],
        }));
        return false;
      },
      fileList: this.state.fileList,
    };

    return (
      <div>
        <Upload {...props}>
          <Button>
            <Icon type="file_upload" /> Select File
          </Button>
        </Upload>
        <Button
          className="upload-demo-start"
          type="primary"
          onClick={this.handleUpload}
          disabled={this.state.fileList.length === 0}
          loading={uploading}
        >
          {uploading ? 'Uploading' : 'Start Upload' }
        </Button>
      </div>
    );
  }
}

ReactDOM.render(<Demo />, mountNode);

API

服务端上传接口实现可以参考 jQuery-File-Upload。

参数	说明	类型	默认值
accept	接受上传的文件类型, 详见 input accept Attribute	string	无
action	必选参数, 上传的地址	string	无
beforeUpload	上传文件之前的钩子，参数为上传的文件，若返回 `false` 则停止上传。支持返回一个 Promise 对象，Promise 对象 reject 时则停止上传，resolve 时开始上传。注意：IE9 不支持该方法。	(file, fileList) => `boolean	Promise`
customRequest	通过覆盖默认的上传行为，可以自定义自己的上传实现	Function	无
data	上传所需参数或返回上传参数的方法	object\|function(file)	无
defaultFileList	默认已经上传的文件列表	object[]	无
disabled	是否禁用	boolean	false
fileList	已经上传的文件列表（受控），使用此参数时，如果遇到 `onChange` 只调用一次的问题，请参考 #2423	object[]	无
headers	设置上传的请求头部，IE10 以上有效	object	无
listType	上传列表的内建样式，支持三种基本样式 `text`, `picture` 和 `picture-card`	string	‘text’
multiple	是否支持多选文件，`ie10+` 支持。开启后按住 ctrl 可选择多个文件。	boolean	false
name	发到后台的文件参数名	string	‘file’
showUploadList	是否展示 uploadList, 可设为一个对象，用于单独设定 showPreviewIcon 和 showRemoveIcon	Boolean or { showPreviewIcon?: boolean, showRemoveIcon?: boolean }	true
supportServerRender	服务端渲染时需要打开这个	boolean	false
withCredentials	上传请求时是否携带 cookie	boolean	false
onChange	上传文件改变时的状态，详见 onChange	Function	无
onPreview	点击文件链接或预览图标时的回调	Function(file)	无
onRemove	点击移除文件时的回调，返回值为 false 时不移除。支持返回一个 Promise 对象，Promise 对象 resolve(false) 或 reject 时不移除。	Function(file): `boolean	Promise`

onChange

上传中、完成、失败都会调用这个函数。

文件状态改变的回调，返回为：

{
  file: { /* ... */ },
  fileList: [ /* ... */ ],
  event: { /* ... */ },
}

file 当前操作的文件对象。

   {
      uid: 'uid',      // 文件唯一标识，建议设置为负数，防止和内部产生的 id 冲突
      name: 'xx.png'   // 文件名
      status: 'done', // 状态有：uploading done error removed
      response: '{"status": "success"}', // 服务端响应内容
      linkProps: '{"download": "image"}', // 下载链接额外的 HTML 属性
   }

[email protected] 之前，multiple 模式下，此参数为一个对象数组 [file, ...]，[email protected] 开始无论是否多选，均为一个对象。

fileList 当前的文件列表。
event 上传中的服务端响应内容，包含了上传进度等信息，高级浏览器支持。

显示下载链接

请使用 fileList 属性设置数组项的 url 属性进行展示控制。

customRequest

https://github.com/react-component/upload#customrequest

IE note

https://github.com/react-component/upload#ie89-note