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Mailgun Send Email using MIME

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Send an email using MIME. This allows for the Chilkat email object to be used to construct the email. Then it can be sent using Mailgun.

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Chilkat2 Java
import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.Email;
import com.chilkatsoft.chilkat2.Http;
import com.chilkatsoft.chilkat2.HttpRequest;
import com.chilkatsoft.chilkat2.HttpResponse;
import com.chilkatsoft.chilkat2.JsonObject;
import com.chilkatsoft.chilkat2.StringBuilder;

public class ChilkatExample {

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

        // We're going to create an email that contains an .zip attachment,
        // and also both plain-text and HTML alternative bodies.
        // The HTML body will include an image.

        Email email = new Email();

        // Adding attachments, HTML/plain-text bodies, etc can be done
        // in any order:

        // Add an attachment
        String contentType;
        try {
            contentType = email.addFileAttachment("qa_data/hamlet.zip");

            // Add some headers:
            email.setSubject("This is a complex email");
            // Please change this email address before testing.
            email.addTo("Joe Example", "joe@example.com");
            email.setFrom("Your Name <mailgun@YOUR_DOMAIN_NAME>");

            // Add a plain-text body:
            email.addPlainTextAlternativeBody("This is the plain-text body");

            // Add an image that will be embedded in the HTML body.
            email.addRelatedFile2("qa_data/jpg/starfish.jpg", "starfish.jpg");
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        // Add an HTML body:
        String html = "<html><body><b>This is the HTML body</b><br><img src=\"starfish.jpg\"></body></html>";

        email.addHtmlAlternativeBody(html);

        // ------------------------------------------------------------------------
        // Send the above email using Mailgun

        Http http = new Http();

        // Implements the following CURL command:

        http.setLogin("api");
        http.setPassword("sending_api_key");        // Replace with your actual sending API key.

        HttpRequest req = new HttpRequest();
        req.setHttpVerb("POST");
        req.setPath("/v3/YOUR_DOMAIN_NAME/messages.mime");
        req.setContentType("multipart/form-data");

        req.addParam("from", "Your Name <mailgun@YOUR_DOMAIN_NAME>");
        req.addParam("to", "Joe Example <joe@example.com>");
        req.addStringForUpload2("message", "message.eml", email.getMime(), "utf-8", "application/octet-stream");

        HttpResponse resp = new HttpResponse();
        try {
            http.httpSReq("api.mailgun.net", 443, true, req, resp);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        StringBuilder sbResponseBody = new StringBuilder();
        resp.getBodySb(sbResponseBody);
        JsonObject jResp = new JsonObject();
        jResp.loadSb(sbResponseBody);
        jResp.setEmitCompact(false);

        System.out.println("Response Body:");
        System.out.println(jResp.emit());

        int respStatusCode = resp.getStatusCode();
        System.out.println("Response Status Code = " + respStatusCode);
        if (respStatusCode >= 400) {
            System.out.println("Response Header:");
            System.out.println(resp.getHeader());
            System.out.println("Failed.");
            return;
        }

        // Sample JSON response:
        // (Sample code for parsing the JSON response is shown below)

        // {
        //   "id": "<20210429234809.1.2D550E1C94D3D98F@sandbox0e542e4c577f4bbb98c8bf6b6bca727b.mailgun.org>",
        //   "message": "Queued. Thank you."
        // }

        // Sample code for parsing the JSON response...
        // Use the following online tool to generate parsing code from sample JSON:
        // Generate Parsing Code from JSON

        String id = jResp.stringOf("id");
        String message = jResp.stringOf("message");
    }
}