Java

Outlook --Download Attachments for a Specific Message

See more Outlook Examples

Demonstrates how to download the attachments for a particular email message.

Note: This example requires Chilkat v9.5.0.67 or greater.

This example applies to: Exchange Online | Office 365 | Hotmail.com | Live.com | MSN.com | Outlook.com | Passport.com

Chilkat2 Java

import com.chilkatsoft.chilkat2.BinData;
import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.DateTime;
import com.chilkatsoft.chilkat2.FileAccess;
import com.chilkatsoft.chilkat2.Http;
import com.chilkatsoft.chilkat2.JsonObject;
import com.chilkatsoft.chilkat2.StringBuilder;

public class ChilkatExample {

    public static void main(String[] args) {
        boolean success = false;

        // This example requires the Chilkat API to have been previously unlocked.
        // See Global Unlock Sample for sample code.

        Http http = new Http();

        // Use your previously obtained access token here:
        // See the following examples for getting an access token:
        //    Get Microsoft Graph OAuth2 Access Token (Azure AD v2.0 Endpoint).
        //    Get Microsoft Graph OAuth2 Access Token (Azure AD Endpoint).
        //    Refresh Access Token (Azure AD v2.0 Endpoint).
        //    Refresh Access Token (Azure AD Endpoint).

        http.setAuthToken("MICROSOFT_GRAPH_ACCESS_TOKEN");

        StringBuilder sbResponse = new StringBuilder();

        // Sends:  GET /users/{user_id | userPrincipalName}/messages/{message_id}/attachments
        // Note: It is also possible to use the literal string "me" for the current logged-on user.
        // For example: GET /me/messages/{message_id}/attachments

        http.clearUrlVars();
        http.setUrlVar("userPrincipalName", "chilkatsoft@outlook.com");

        // Assume we already have a message ID from previously listing the messages in a folder
        String messageId = "AAMkADYzZWE3YmZmLWU0YzgtNGNkZC04MGE1LWFiYTFlNTRlY2QwYQBGAAAAAAAu7cUXL5YOTrdsUIw7-v8FBwBUcG0qWqkmQYqWLHQataQxAACnwqJUAABUcG0qWqkmQYqWLHQataQxAACnwrnOAAA=";
        http.setUrlVar("message_id", messageId);

        // Send the request to download the attachments.
        try {
            http.quickGetSb("https://graph.microsoft.com/v1.0/users/{$userPrincipalName}/messages/{$message_id}/attachments", sbResponse);
            success = true;
        } catch (ChilkatException e) {
            success = false;
        }
        if ((!success) && (http.getLastStatus() == 0)) {
            System.out.println(http.getLastErrorText());
            return;
        }

        // The attachment data is contained within the JSON response.
        JsonObject json = new JsonObject();
        json.loadSb(sbResponse);
        json.setEmitCompact(false);

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

        // This is a sample JSON response.  The code for parsing and extracting/saving the attachments
        // is shown below.

        //     {
        //       "@odata.context": "https://graph.microsoft.com/v1.0/$metadata#users('chilkatsoft%40outlook.com')/messages('AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAL8huv8AAADn68XtMop0TpsYJGpfKXY9AAAAwSju2wAAAA%3D%3D')/attachments",
        //       "value": [
        //         {
        //           "@odata.type": "#microsoft.graph.fileAttachment",
        //           "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAL8huv8AAADn68XtMop0TpsYJGpfKXY9AAAAwSju2wAAAAESABAAft6wtbaSJU6sgQLi98DI0Q==",
        //           "lastModifiedDateTime": "2017-05-10T00:30:51Z",
        //           "name": "fishing.pdf",
        //           "contentType": "application/pdf",
        //           "size": 295680,
        //           "isInline": false,
        //           "contentId": "F861B218BE380F44B16933097FDDACFC@namprd20.prod.outlook.com",
        //           "contentLocation": null,
        //           "contentBytes": "JVBERi0xLjMKJcfsj6 ... yZWYKMjk0MzY5CiUlRU9GCg=="
        //         },
        //         {
        //           "@odata.type": "#microsoft.graph.fileAttachment",
        //           "id": "AQMkADAwATM0MDAAMS1iNTcwLWI2NTEtMDACLTAwCgBGAAADsVyfxjDU406Ic4X7ill8xAcA5_vF7TKKdE6bGCRqXyl2PQAAAL8huv8AAADn68XtMop0TpsYJGpfKXY9AAAAwSju2wAAAAESABAAXS7qXQ-iRUCYXnhJpN8Ihg==",
        //           "lastModifiedDateTime": "2017-05-10T00:30:51Z",
        //           "name": "testCert.cer",
        //           "contentType": "application/octet-stream",
        //           "size": 1674,
        //           "isInline": false,
        //           "contentId": "5E51FA33EF0F8941ACC8260395CB1A33@namprd20.prod.outlook.com",
        //           "contentLocation": null,
        //           "contentBytes": "MIIFRjCCBC6gAwIBA ... 7pt3C5w=="
        //         }
        //       ]
        //     }

        StringBuilder sbSavePath = new StringBuilder();
        BinData attachData = new BinData();
        DateTime lastMod = new DateTime();
        FileAccess fac = new FileAccess();

        int i = 0;
        int numMessages = json.sizeOfArray("value");
        while (i < numMessages) {
            json.setI(i);

            System.out.println("name: " + json.stringOf("value[i].name"));
            System.out.println("contentType: " + json.stringOf("value[i].contentType"));
            int sizeInBytes = json.intOf("value[i].size");
            System.out.println("size: " + sizeInBytes);

            // Extract the data and save to a file.
            sbSavePath.setString("qa_output/");
            sbSavePath.append(json.stringOf("value[i].name"));

            attachData.clear();
            attachData.appendEncoded(json.stringOf("value[i].contentBytes"), "base64");
            attachData.writeFile(sbSavePath.getAsString());

            // Get the last-modified date/time and set the output file's last-mod date/time..
            lastMod.setFromTimestamp(json.stringOf("value[i].lastModifiedDateTime"));
            fac.setLastModified(sbSavePath.getAsString(), lastMod);

            System.out.println("----");

            i = i + 1;
        }

        // The output of the above loop is:
        //
        //     name: fishing.pdf
        //     contentType: application/pdf
        //     size: 295680
        //     ----
        //     name: testCert.cer
        //     contentType: application/octet-stream
        //     size: 1674
        //     ----
        //
    }
}