Bulk-fetching emails in the new Gmail API

gmail-api, google-api, python

Solution

Here is an example of batch request in Java where I get all the threads using threads ids. This can be easily adapted for your need.

BatchRequest b = service.batch();
//callback function. (Can also define different callbacks for each request, as required)
JsonBatchCallback<Thread> bc = new JsonBatchCallback<Thread>() {

    @Override
    public void onSuccess(Thread t, HttpHeaders responseHeaders)
            throws IOException {
        System.out.println(t.getMessages().get(0).getPayload().getBody().getData());
    }

    @Override
    public void onFailure(GoogleJsonError e, HttpHeaders responseHeaders)
            throws IOException {

    }
};

// queuing requests on the batch requests
for (Thread thread : threads) {
    service.users().threads().get("me", threads.getId()).queue(b, bc);
}


b.execute();

Problem

I'm using the python version of the newly released Gmail API by Google. The following call returns just a list of message ids: ``` service.users().messages().list(userId = 'me').execute() ``` But then I just have a list of message ids and need to iterate over them and fetch them one-by-one. Is there a way to get the whole message content for a list of ids, in a single call ? (Similar to how it's done in the Google Calendar API) ? And if not supported yet, is this something that Google would like to consider adding in the API ? Update Here is the solution that worked for me: `batch = BatchHttpRequest() for msg_id in message_ids: batch.add(service.users().messages().get(userId = 'me', id = msg_id['id']), callback = mycallbackfunc) batch.execute()`

Original source