Java

Download a Specific GMail Message into a Chilkat Email Object

See more GMail REST API Examples

Demonstrates how to download a GMail message into a Chilkat Email object. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Email;
import com.chilkatsoft.chilkat2.Http;
import com.chilkatsoft.chilkat2.JsonObject;
import com.chilkatsoft.chilkat2.StringBuilder;

public class ChilkatExample {

    public static void main(String[] args) {
        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        Http http = new Http();
        http.setAuthToken("GMAIL-ACCESS-TOKEN");

        // The id of the GMail message to download.
        String id = "166e50fed0b9b0cb";
        String userId = "me";

        http.setUrlVar("userId", "me");
        http.setUrlVar("id", id);

        // Fetch the email.
        String url = "https://www.googleapis.com/gmail/v1/users/{$userId}/messages/{$id}?format=raw";
        StringBuilder sbJson = new StringBuilder();
        try {
            http.downloadSb(url, "utf-8", sbJson);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        JsonObject json = new JsonObject();
        json.loadSb(sbJson);
        json.setEmitCompact(false);

        if (http.getLastStatus() != 200) {
            System.out.println(json.emit());
            System.out.println("Failed.");
            return;
        }

        // The returned JSON contains something like this:

        // {
        //   "id": "166e50fed0b9b0cb",
        //   "threadId": "166e50fed0b9b0cb",
        //   "labelIds": [
        //     "CATEGORY_SOCIAL",
        //     "INBOX"
        //   ],
        //   "snippet": "...",
        //   "historyId": "582477",
        //   "internalDate": "1541441317000",
        //   "sizeEstimate": 28603,
        //   "raw": "BASE64URL_CONTENT"
        // }

        // The RFC822 MIME of the email is contained in the "raw" as a base64URL encoded string.
        // Let's decode and load into a Chilkat email object..
        StringBuilder sbRaw = new StringBuilder();
        json.stringOfSb("raw", sbRaw);
        sbRaw.decode("base64url", "utf-8");

        Email email = new Email();
        email.setFromMimeSb(sbRaw);

        // Now we can use the email API to do whatever we desire..
        System.out.println("From: " + email.getFromAddress());
        System.out.println("Subject: " + email.getSubject());
        // ...
    }
}