Gmail API 断点续传 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。为此，我正在尝试通过可恢复上传发送它。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;

提出请求后，我得到了位置

location = res.Headers["Location"];

之后，我使用位置发出PUT请求。

我想知道我应该在第一个请求正文中插入什么，在第二个请求中应该插入什么。 我看过这篇文章 使用带有 Gmail API 的可断点续传附加文件 但该代码仅适用于小于 5MB 的文件。我应该做些什么来完成大于 5MB 的传输吗？

Answer 1

上传附件文档中实际上有示例。

步骤 1：启动可恢复会话 可恢复会话启动请求

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
}

步骤 2：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