使用 javascript 进行 Google Drive 可恢复上传

Getting the resumable upload URI:

// Authentication is already done
var request = gapi.client.request({
    "path": DRIVE_API_PATH, // "/upload/drive/v2/files"
    "method": "POST",
    "params": {
        "uploadType": "resumable"
    },
    "headers": {
        "X-Upload-Content-Type": self.file.type,
        //"X-Upload-Content-Length": self.file.size
        // If this is uncommented, the upload fails because the file size is
        // different (corrupted file). Manually setting to the corrupted file
        // size doesn't give 400 Bad Request.
    },
    "body": {
        // self.file is the file object from <input type="file">
        "title": self.file.name, 
        "mimeType": self.file.type,
        "Content-Lenght": self.file.size,
    }
});

一次性发送整个文件:

// I read the file using FileReader and readAsBinaryString
// body is the reader.result (or btoa(reader.result))
// and this code is ran after the file has been read
var request = gapi.client.request({
    "path": self.resumableUrl, // URI got from previous request
    "method": "PUT",
    "headers": {
        //"Content-Encoding": "base64", // Uploading with base64 works
        "Content-Type": self.file.type
    },
    "body": body
});

我错过了什么吗?是否可以以二进制流上传文件?我是使用 HTML 和 Javascript 上传文件的新手，我还没有找到任何使用可恢复上传的 Google Javascript 库的示例.SO中有类似问题没有答案.