如何使用Google Drive API将文件上传到Google Drive?

问题描述：

我按照文档中的说明进行操作(https://developers.google.com/drive/api/v3/manage-uploads#http---single-request )，但无效:

I did as in the documentation (https://developers.google.com/drive/api/v3/manage-uploads#http---single-request), but it doesn't work:

          var fileMetadata = {
            name: e.target.files[j].name,
            parents: this.currentDirectoryId ? [this.currentDirectoryId] : []
          }
          var media = {
            mimeType: e.target.files[j].type,
            body: e.target.files[j]
          }
          window.gapi.client.drive.files.create({
            resource: fileMetadata,
            media: media,
            fields: 'id, name, mimeType, createdTime'
          }).then(res => console.log(res))

文件已创建，但为空，名为无标题".带有mimeType应用程序/八位字节流"

File is created, but empty and named "Untitled" with mimeType "application/octet-stream"

答

问题和解决方法:

当我测试 gapi.client.drive.files.create 时，虽然此方法可以使用元数据创建新文件，但似乎无法包含文件内容.因此，在这个答案中，为了通过包含文件元数据来上传文件，我想建议使用Javascript的 fetch 来上传具有 multipart/form-data 的文件.在这种情况下，访问令牌是通过 gapi.auth.getToken().access_token 检索的.

Issue and workaround:
- When I tested gapi.client.drive.files.create, it seems that although this method can create new file with the metadata, the file content cannot be included. So in this answer, in order to upload a file by including the file metadata, I would like to propose to upload a file with multipart/form-data using fetch of Javascript. In this case, the access token is retrieved by gapi.auth.getToken().access_token.
  
  很遗憾，从您的脚本中，我无法理解 e.target .因此，在这个示例脚本中，我想提出一个示例脚本，用于上传带有元数据的文件，该文件是从input标签检索的.
  
  Unfortunately, from your script, I couldn't understand about e.target. So in this sample script, I would like to propose the sample script for uploading a file, which is retrieved from the input tag, with the metadata.
```
<input type="file" id="files" name="file">
```
  JavaScript端:
```
const files = document.getElementById("files").files;

const file = files[0];
const fr = new FileReader();
fr.readAsArrayBuffer(file);
fr.onload = (f) => {
  const fileMetadata = {
    name: file.name,
    parents: this.currentDirectoryId ? [this.currentDirectoryId] : []  // This is from your script.
  }
  const form = new FormData();
  form.append('metadata', new Blob([JSON.stringify(fileMetadata)], {type: 'application/json'}));
  form.append('file', new Blob([new Uint8Array(f.target.result)], {type: file.type}));
  fetch('https://www.googleapis.com/upload/drive/v3/files?uploadType=multipart', {
    method: 'POST',
    headers: new Headers({'Authorization': 'Bearer ' + gapi.auth.getToken().access_token}),
    body: form
  }).then(res => res.json()).then(res => console.log(res));
};
```
  - 在此脚本中，从 input 标记检索的文件通过 multipart/form-data 上传到Google云端硬盘.

如何使用Google Drive API将文件上传到Google Drive?

问题和解决方法:

Issue and workaround:

JavaScript端:

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