Gmail Api 可恢复上传 Rest（附件大于 5MB）

Question

我正在尝试通过 Gmail Api Rest 发送附件大于 5MB 的邮件。为了实现这一点，我试图通过可恢复上传来发送它。这是我的代码。

byte[] ba = System.IO.File.ReadAllBytes(uploadFromPath);
String base64String = Convert.ToBase64String(ba);
string url = "https://www.googleapis.com/upload/gmail/v1/users/me/messages/send?uploadType=resumable"
HttpWebRequest request = WebRequest.Create(url) as HttpWebRequest;
request.Headers.Add("Authorization", "Bearer " + token);
request.Headers.Add("X-Upload-Content-Type", "message/rfc822");
request.Headers["X-Upload-Content-Length"]= base64String.Length.ToString();
request.Method = "POST";
request.ContentType = "application/json";
request.ContentLength = body.Length;

在我提出请求后，我得到了位置

location = res.Headers["Location"];

然后我向该位置发出 PUT 请求。

我想知道我应该在第一个请求正文中插入什么以及应该在第二个请求中插入什么。 我看过这个帖子Attaching a file using Resumable upload w/ Gmail API 但该代码仅适用于小于 5MB 的文件。我还应该做些什么来完成大于 5MB 的附件？

Answer 1

Upload Attachment 文档中实际上有示例。

第 1 步：开始可恢复会话 可恢复会话发起请求

POST /upload/gmail/v1/users/userId/messages/send?uploadType=resumable HTTP/1.1
Host: www.googleapis.com
Authorization: Bearer your_auth_token
Content-Length: 38
Content-Type: application/json; charset=UTF-8
X-Upload-Content-Type: message/rfc822
X-Upload-Content-Length: 2000000

{
  "id": string,
  "threadId": string,
  "labelIds": [
    string
  ],
  "snippet": string,
  "historyId": unsigned long,
  "payload": {
    "partId": string,
    "mimeType": string,
    "filename": string,
    "headers": [
      {
        "name": string,
        "value": string
      }
    ],
    "body": users.messages.attachments Resource,
    "parts": [
      (MessagePart)
    ]
  },
  "sizeEstimate": integer,
  "raw": bytes
}

第 2 步：保存可恢复会话 URI

HTTP/1.1 200 OK
Location: https://www.googleapis.com/upload/gmail/v1/users/userId/messages/send?uploadType=resumable&upload_id=xa298sd_sdlkj2
Content-Length: 0

第 3 步：上传文件

PUT https://www.googleapis.com/upload/gmail/v1/users/userId/messages/send?uploadType=resumable&upload_id=xa298sd_sdlkj2 HTTP/1.1
Content-Length: 2000000
Content-Type: message/rfc822

bytes 0-1999999