private void writeBody(
HttpClientRequest clientRequest,
MailgunSendRequest sendRequest,
Handler<AsyncResult<Void>> completionHandler) {
EmailEntity emailEntity = sendRequest.getEmailEntity();
if (emailEntity == null) {
if (completionHandler != null) {
completionHandler.handle(Future.failedFuture(new Exception("Null Email Entity.")));
}
return;
}
if (emailEntity.getFrom() == null || emailEntity.getFrom().isEmpty()) {
if (completionHandler != null) {
completionHandler.handle(Future.failedFuture(new Exception("Null or Empty From Field.")));
}
return;
}
if (emailEntity.getTo() == null || emailEntity.getTo().isEmpty()) {
if (completionHandler != null) {
completionHandler.handle(Future.failedFuture(new Exception("Null or Empty To Field.")));
}
return;
}
MultiPartUtility mpu = new MultiPartUtility();
// from
mpu.formField("from", emailEntity.getFrom());
// to
String[] toList = emailEntity.getTo().split(";|,|\\s");
for (String to : toList) {
mpu.formField("to", to);
}
// cc
if (emailEntity.getCc() != null && !emailEntity.getCc().isEmpty()) {
String[] ccList = emailEntity.getCc().split(";|,|\\s");
for (String cc : ccList) {
mpu.formField("cc", cc);
}
}
// subject
mpu.formField(
"subject",
(emailEntity.getSubject() == null ? "" : sendRequest.getEmailEntity().getSubject()));
// text
if (emailEntity.getTextBody() != null && !emailEntity.getTextBody().isEmpty()) {
mpu.formField("text", emailEntity.getTextBody());
}
// html
if (emailEntity.getHtmlBody() != null && !emailEntity.getHtmlBody().isEmpty()) {
mpu.formField("html", emailEntity.getHtmlBody());
}
// write to client
clientRequest.write(mpu.get());
}
private void sendEmail(final MailgunSendRequest sendRequest) {
sendRequest.incrementAttempts();
final HttpClientRequest clientRequest =
client
.post("/messages")
.handler(new HttpResponseHandler(sendRequest))
.exceptionHandler(throwable -> failure(sendRequest, throwable))
.setChunked(true);
clientRequest.putHeader(HttpHeaders.AUTHORIZATION, "api:" + apiKey);
clientRequest.putHeader(
HttpHeaders.CONTENT_TYPE,
ContentType.MULTIPART_FORM_DATA.getMimeType() + "; boundary=" + MultiPartUtility.BOUNDARY);
writeBodyObservable(clientRequest, sendRequest)
.doOnError(
throwable -> {
if (sendRequest.getCompletionHandler() != null) {
sendRequest.getCompletionHandler().handle(Future.failedFuture(throwable));
}
})
.doOnNext(
aVoid -> {
if (sendRequest.getEmailEntity().isAttachments()) {
getAttachmentEntitiesObservable(sendRequest.getEmailEntity())
.doOnError(throwable -> failure(sendRequest, throwable))
.doOnNext(
attachmentEntities ->
new FilePipeIterator(
clientRequest,
attachmentEntities.iterator(),
new FileGetPipeHandler() {
@Override
public void onComplete() {
clientRequest.end();
}
@Override
public void onFailure(Throwable throwable) {
failure(sendRequest, throwable);
}
})
.start());
} else {
clientRequest.end();
}
});
}
@Override
public void handle(HttpClientResponse httpClientResponse) {
if (httpClientResponse.statusCode() == HttpStatus.SC_OK) {
httpClientResponse.bodyHandler(buffer -> totalBuffer.appendBuffer(buffer));
httpClientResponse.endHandler(
aVoid -> {
try {
MailgunSendResponse response =
jsonMapper.readValue(totalBuffer.toString(), MailgunSendResponse.class);
if (response == null || response.getId() == null || response.getId().isEmpty()) {
failure(sendRequest, new Exception("Invalid Response to Send Request"));
return;
}
EmailEntity emailEntity = sendRequest.getEmailEntity();
emailEntity.setMessageId(response.getId());
updateRecords(emailEntity);
publishEvent(emailEntity, true);
success(sendRequest, emailEntity);
} catch (Throwable throwable) {
updateRecords(sendRequest.getEmailEntity());
publishEvent(sendRequest.getEmailEntity(), false);
failure(sendRequest, throwable);
}
});
} else {
if (sendRequest.getAttempts() < ALLOWED_ATTEMPTS) {
sendEmail(sendRequest);
} else {
updateRecords(sendRequest.getEmailEntity());
publishEvent(sendRequest.getEmailEntity(), false);
failure(
sendRequest,
new Exception(
"Failed to Send Email Using "
+ ALLOWED_ATTEMPTS
+ " Attempts with Response Code: "
+ httpClientResponse.statusCode()));
}
}
}