如何从 Gmail 获取某个电子邮件的线程 ID

Question

I want to find the thread id for a certain email which I have sent from gmail. I went through the Gmail apis, in which there are methods to get the list of threads as well as a method which gives you all the messages related to that thread after you send the user id ie email and thread id. I can use the list method to get thread id but is there any alternate way to get the thread id?

Answer 1

If you just have the messageId , you could get the message , specifically asking just for the threadId of that message:

Request

usedId = me
id = 1514453c0800d5fa
fields = threadId

GET https://www.googleapis.com/gmail/v1/users/me/messages/1514453c0800d5fa?fields=threadId&access_token={YOUR_API_KEY}

Response

{
 "threadId": "1514453c0800d5fa"
}

Then, just use this to get the thread :

Request

userId = me
id = 1514453c0800d5fa

GET https://www.googleapis.com/gmail/v1/users/me/threads/1514453c0800d5fa?access_token={YOUR_API_KEY}

Also, if you know the message is the first message in the thread, the threadId will be the same as the messageId , as in the example above.

If you don't have Google's own messageId but the Message-ID , you have to list the message as you said:

Request

userId = me
q = rfc822msgid:<Message-ID>

GET https://www.googleapis.com/gmail/v1/users/me/messages?q=rfc822msgid%3A%3C0000015148b39f7a-64856e69-3b6e-4e37-bff0-db4e26aae420-000000%40eu-west-1.amazonses.com%3E&access_token={YOUR_API_KEY}

Response

{
 "messages": [
  {
   "id": "15148b3a2f9a26a0",
   "threadId": "15148b3a2f9a26a0"
  }
 ],
 "resultSizeEstimate": 1
}