SMTP

Smtp interface provides the service to send emails using the Simple Mail Transfer Protocol. To create an ISmtp instance, at first an instance of ISmtpProvider, ISocketProvider (TCP) and ISocketProvider (TLS) must be created. This need to be done by calling CreateSmtpProvider(), CreateTCPSocketProvider() and CreateTLSSocketProvider(tcpSocketProvider). An ISmtpProvider can be used to create multiple ISmtp instances. To read more about the ISocket, please check: ISocket.

When a new TaskSmtpSend is started, the connection with the SMTP server is established using TCP. If the server allows STARTTLS, the connection will be upgraded to TLS. Otherwise TCP will continue to be used.

File information

Functions

Functions to initialize

class ISmtpProvider * CreateSmtpProvider();

Classes

ISmtpProvider

class ISmtpProvider {
public:
    virtual ~ISmtpProvider() {}
    virtual class ISmtp * CreateSmtp(class IIoMux * iomux, class ISocketProvider * tcpSocketProvider, class ISocketProvider * tlsSocketProvider, class IInstanceLog * const log) = 0;
};

Overview

Public functions

ISmtp

class ISmtp {
public:
    virtual ~ISmtp() {}
    virtual class ISmtpSend * CreateSend(const char *from, const char *fromName, const char *subject, const char *host, const char *server, const char *userSmtp, const char *password) = 0;
    virtual void SendChunk(const char *attachmentChunk, int sChunk, bool lastChunk, dword fileIndex) = 0;
};

Overview

Public functions

ISmtpSend

    class ISmtpSend : public ITask {
    public:
    virtual void AddAttachment(const char *attachmentUrl, const char * mimeType = nullptr) = 0;
    virtual void AddTo(const char *rcpt) = 0;
    virtual void AddCc(const char *rcpt) = 0;
    virtual void AddBcc(const char *rcpt) = 0;
    virtual void AddBody(const char *data, const char *format, const char *charset) = 0;
    virtual void Start(class UTask * user) = 0;
    };

Overview

Public functions

Code Examples

Initialize the Provider

#include "common/interface/smtp.h"
...
ISmtpProvider * smtpProvider = CreateSmtpProvider();
...
AppService * service = new AppService(iomux, localSocketProvider, tcpSocketProvider, tlsSocketProvider, ..., smtpProvider, &serviceArgs);
...
delete smtpProvider;

Create the ISmtp instance

app::app(IIoMux * const iomux, ISocketProvider * localSocketProvider, IWebserverPluginProvider * const webserverPluginProvider, IDatabaseProvider * databaseProvider, class Service * service, ISmtpProvider * smtpProvider, AppInstanceArgs * args) :
AppInstance(service, args)
{
    this->smtp = smtpProvider->CreateSmtp(iomux, tcpSocketProvider, tlsSocketProvider, this, "145.253.157.7");
    this->logFlags |= LOG_SMTP; // to show the flags generated by the SMTP class
}
app::~app()
{
    if (webserverPlugin) delete webserverPlugin;
    if (smtp) delete smtp;
}

Send Emails

SendEmail::SendEmail(class App * app): taskSmtp(this, &SendEmail::SmtpSendComplete, &SendEmail::SmtpSendFailed, &SendEmail::SmtpSendProgress)
{        
    ...
}
SendEmail::~SendEmail()
{
    ...
}
void SendEmail::Send()
{
    ISmtpSend * emailTask = appInstance->smtp->CreateSend("sender@innovaphone.com", "SenderName", "Subject", "sophos", "sophos.innovaphone.com", "usersmtp", "password");
    emailTask->AddTo("receiver@innovaphone.com");
    emailTask->AddTo("otherreceiver@innovaphone.com");
    emailTask->AddBody("Body of the email...", "text/html", "ISO-8859-1");
    emailTask->AddAttachment("test.txt");
    emailTask->AddAttachment("Fish.png");
    emailTask->AddAttachment("rfc821.pdf");
    bufferrb = (char*)malloc(sizeof(char) * 4096);
    emailTask->Start(&taskSmtp);
}
void SendEmail::SmtpSendComplete(class TaskSmtpSend * task)
{
    ...
}
void SendEmail::SmtpSendFailed(class TaskSmtpSend * task)
{
    ...
}
void SendEmail::SmtpSendProgress(class TaskSmtpSend * task, dword progress)
{
    //SmtpSendProgress will be called for every attachment added. For each attachment it will be called until lastChunk will be set as true.
    //progress indicates the number of the attachment requested by the task.
    //It starts with "0" for the first filename added.
    
    appInstance->smtp->SendChunk(ReadFiles(progress), len, lastChunk, progress);  
}
char * SendEmail::ReadFiles(dword file) //Example function to get the attachments chunks.
{
    char * path = (char*)"";
    switch (file)
    {
    case 0:
        path = (char*)"/path/test.txt";
        break;
    case 1:
        path = (char*)"/path/Fish.png";
        break;
    case 2:
        path = (char*)"/path/rfc821.pdf";
        break;
    default:
        break;
    }
    if (!opened)
    {
        opened = true;
        pFile = fopen(path, "rb");   
        fseek(pFile, 0, SEEK_END);
        lSize = ftell(pFile);
        rewind(pFile);
        lastChunk = false;
        bytesRead = 0;
    }
    if (!feof(pFile))
    {
        len = 0;
        len = fread(bufferrb, 1, 4096, pFile);
        bytesRead += len;
        if (bytesRead >= lSize) lastChunk = true;
    }
    if (lastChunk)
    {
        opened = false;
        fclose(pFile);
    }
    return bufferrb;
}