Question

使用react-dropzone上传文件，我想实现文件进度，例如文件传输百分比或mbs数据传输。

这是https://react-dropzone.netlify.com/

的链接

onDrop(acceptedFiles, uploadApi) {
  const filesToBeSent = this.state.filesToBeSent;
  if (acceptedFiles.length) {
    if (acceptedFiles[0].type === FileTypeList.TYPE) {
      filesToBeSent.push(acceptedFiles);
      const formData = new FormData();
      formData.append("file", acceptedFiles[0]);
      uploadApi(formData).then((response) => {
        this.setState({
          filesPreview: [],
          filesToBeSent: [{}],
          showNotification: true,
          uploadResponse: response,
        });
        this.props.fetchHistory();
      });
    } else {
      this.setState({
        fileType: true,
      });
    }
  } else {
    this.setState({
      fileSize: true,
    });
  }
}

<Dropzone maxSize={this.props.maxSize} onDrop={(files) => this.onDrop(files, this.props.uploadApi)}>
  {({ getRootProps, getInputProps }) => {
    return (
      <div {...getRootProps()} className={"dropzone"}>
        <UploadPanel id="uploadFileContainerId">
          <p>
            <img id="uploadImage" src={UploadImage} />
          </p>
          <input {...getInputProps()} />
          <div>{t("assets:UPLOAD_FILE")}</div>
          <Note>
            {this.props.maxSizeTitle ? t("workers:UPLOAD_WORKER_FILE_SIZE") : t("assets:UPLOAD_FILE_SIZE")}
          </Note>
        </UploadPanel>
      </div>
    );
  }}
</Dropzone>

Answer 1

如果您想检测文件上传过程，可以使用XMLHttpRequest

onDrop(acceptedFiles) {
  const formData = new FormData();
  formData.append('file', acceptedFiles[0])

  const xhr = new XMLHttpRequest();
  xhr.open(/*params*/);
  xhr.send(formData)
  xhr.upload.onprogress = event => {
   const percentages = +((event.loaded / event.total) * 100).toFixed(2);
   this.setState({percentages})
  };
  xhr.onreadystatechange = () => {
    if (xhr.readyState !== 4) return;
    if (xhr.status !== 200) {
     /*handle error*/
    }
    /*handle success*/
  };
}

Answer 2

这是另一个基于turchak的答案的示例，用于处理任意数量的文件：

onDrop(acceptedFiles) {
  const formData = new FormData();
  for (const file of acceptedFiles) formData.append('file', file);

  const xhr = new XMLHttpRequest();
  xhr.upload.onprogress = event => {
   const percentage = parseInt((event.loaded / event.total) * 100);
   console.log(percentage); // Update progress here
  };
  xhr.onreadystatechange = () => {
    if (xhr.readyState !== 4) return;
    if (xhr.status !== 200) {
     console.log('error'); // Handle error here
    }
     console.log('success'); // Handle success here
  };
  xhr.open('POST', 'https://httpbin.org/post', true);
  xhr.send(formData);
}

使用react-dropzone的文件上传进度

2 个答案: