How to send Email with Attachment from Oracle Procedure

* ** ****************************************************************************************** ** *
   ** DESCRIPTION OF SCRIPT :  THIS PROCESS IS FOR SENDING MAIL WITH THE ATTACHMENT             * ** ****************************************************************************************** ** */

CREATE OR REPLACE PROCEDURE MAIL_FILE( SUBJECT   IN VARCHAR2,
                                       MESSAGE   IN VARCHAR2,
                                       MAX_SIZE  IN NUMBER DEFAULT 9999999999,
                                       FILENAME1 IN VARCHAR2 DEFAULT NULL,
                                       FILENAME2 IN VARCHAR2 DEFAULT NULL,
                                       FILENAME3 IN VARCHAR2 DEFAULT NULL,
                                       RETURN_DESC OUT VARCHAR2) IS

  L_SMTP_SERVER                 VARCHAR2(20);                    /** TO STORE THE IP ADDRESS OF THE SMTP SERVER **/
  L_SMTP_SERVER_PORT            NUMBER;                          /** TO STORE THE SMTP PORT OF THE SMTP SERVER **/
  L_DIRECTORY_NAME              VARCHAR2(200);                   /** TO STORE THE PATH / DIRECTORY NAME OF THE FILE **/
  L_FILE_NAME                   VARCHAR2(100);                   /** TO STORE THE FILENAME **/
  L_LINE                        VARCHAR2(1000);                  /** TO STORE THE CONTENTS OF THE LINE READ FROM THE FILE **/    
  CRLF                          VARCHAR2(2):= CHR(13) || CHR(10);
  L_MESG                        VARCHAR2(32767);                 /** TO STORE THE MESSAGE **/
  CONN                          UTL_SMTP.CONNECTION;             /** SMTP CONNECTION VARIABLE **/
  L_MSG_TO                      VARCHAR2(2000);                  /** TO STORE THE LIST OF RECIPEINTS **/
  L_SENDER_NAME                 VARCHAR2(200);                   /** TO STORE THE NAME OF THE SENDER **/
  
  TYPE VARCHAR2_TABLE IS TABLE OF VARCHAR2(200) INDEX BY BINARY_INTEGER;

  FILE_ARRAY                    VARCHAR2_TABLE;                 /** AN ARRAY TO STORE THE FILE NAMES **/
  I                             BINARY_INTEGER;                 /** ARRAY INDEX **/

  L_FILE_HANDLE                 UTL_FILE.FILE_TYPE;             /** FILE POINTER **/
  L_SLASH_POS                   NUMBER;                         /** TO STORE THE POSITION OF \ IN THE FILE NAME **/
  
  L_MESG_LEN                    NUMBER;                         /** TO STORE THE LENGHT OF THE MESSAGE **/

  ABORT_PROGRAM                 EXCEPTION;                      /** USER DEFINED EXCEPTION **/ 

  MESG_LENGTH_EXCEEDED          BOOLEAN := FALSE;               /** BOOLEAN VARIABLE TO TRAP IF THE MESSAGE LENGHT IS EXCEEDING **/
  
  RETURN_DESC1                  VARCHAR2(2000);                 /** VARIABLE TO STORE THE ERROR MESSAGE. TO BE RETURNED TO THE CALLING PROGRAM **/
 
 /*** CURSOR TO SELECT THE RECIPEINTS AND MARK A COPY TO THE SENDER AS WELL ***/
 
 CURSOR RECIPIENT_CUR IS 
         SELECT VAL
         FROM MISC 
         WHERE KEY1 = 'EMAIL'
         AND (KEY2 = 'RECIPIENT EMAIL'
         OR KEY2 = 'SENDER EMAIL');
         

/***
  ** THIS PROCEDURE FETCHES THE VALUES FOR MISCELLANEOUS PARAMETERS 
***/

PROCEDURE FETCH_MISC IS 

BEGIN
   RETURN_DESC1  := '11 - E: PARAMETER NOT MAINTAINED IN   MISC FOR AM_KEY1 = SMTP SERVER. ';
   L_SMTP_SERVER := PACKAGE.GET_PVAL('SMTP SERVER');
   
   RETURN_DESC1       := '22 - E: PARAMETER NOT MAINTAINED IN MISC FOR AM_KEY1 = SMTP PORT. ';
   L_SMTP_SERVER_PORT := PACKAGE.GET_PVAL('SMTP PORT');
   
   RETURN_DESC1   := '33 - E: PARAMETER NOT MAINTAINED IN MISC FOR AM_KEY1 = TICKET_EMAIL AND KEY2 =SENDER EMAIL. ';
   L_SENDER_NAME  := PACKAGE.GET_PVAL('TICKET_EMAIL','SENDER EMAIL');


EXCEPTION
  WHEN OTHERS THEN 
      RAISE ABORT_PROGRAM;

END FETCH_MISC;


/**** MAIN PROGRAM STARTS HERE ****/

BEGIN
/*** FETCHING MISCELLANEOUS PARAMETERS ***/

   FETCH_MISC;

/*** ASSIGNING FILE NAMES TO ARRAY   ***/

   FILE_ARRAY(1) := FILENAME1;
   FILE_ARRAY(2) := FILENAME2;
   FILE_ARRAY(3) := FILENAME3;

   RETURN_DESC1  := '10 - E: THERE WAS AN ERROR IN OPENING CONNECTION. ';
   CONN:= UTL_SMTP.OPEN_CONNECTION( L_SMTP_SERVER, L_SMTP_SERVER_PORT ); /** OPEN CONNECTION ON THE SERVER **/

   UTL_SMTP.HELO( CONN, L_SMTP_SERVER );                                 /** DO THE INITIAL HAND SHAKE **/

   UTL_SMTP.MAIL( CONN, L_SENDER_NAME );

   RETURN_DESC1  := '20 - E: THERE WAS AN ERROR IN CREATING RECEIPIENTS. ';
   
   FOR L_RECIPIENT_CUR_REC IN RECIPIENT_CUR                             /** LOOP FOR MULTIPLE RECEIPEINTS  **/
   LOOP

    L_MSG_TO := L_RECIPIENT_CUR_REC.AM_PAR_VAL;
    UTL_SMTP.RCPT( CONN, L_MSG_TO );
    
   END LOOP;
   
     
   UTL_SMTP.OPEN_DATA ( CONN );

/*** GENERATE THE MIME HEADER ***/

   RETURN_DESC1  := '30 - E: THERE WAS AN ERROR IN GENERATING MIME HEADER. ';
   
   L_MESG:= 'Date: ' || TO_CHAR( SYSDATE, 'dd Mon yy hh24:mi:ss' ) || CRLF ||
          'From: ' || L_SENDER_NAME || CRLF ||
          'Subject: ' || SUBJECT || CRLF ||
          'To: ' || L_MSG_TO || CRLF ||
          'Mime-Version: 1.0' || CRLF ||
          'Content-Type: multipart/mixed; boundary="DMW.Boundary.605592468"' || CRLF ||
          '' || CRLF ||
          'This is a Mime message, which your current mail reader may not' || CRLF ||
          'understand. Parts of the message will appear as text. If the remainder' || CRLF ||
          'appears as random characters in the message body, instead of as' || CRLF ||
          'attachments, then you''ll have to extract these parts and decode them' || CRLF ||
          'manually.' || CRLF ||
          '' || CRLF ||
          '--DMW.Boundary.605592468' || CRLF ||
          'Content-Type: text/plain; name="message.txt"; charset=US-ASCII' || CRLF ||
          'Content-Disposition: inline; filename="message.txt"' || CRLF ||
          'Content-Transfer-Encoding: 7bit' || CRLF ||
          '' || CRLF ||
          MESSAGE || CRLF || CRLF || CRLF ;

   L_MESG_LEN := LENGTH(L_MESG);

   IF L_MESG_LEN > MAX_SIZE THEN

      MESG_LENGTH_EXCEEDED := TRUE;

   END IF;
   
   RETURN_DESC1  := '40 - E: THERE WAS AN ERROR IN WRITING MESSAGE TO CONNECTION. ';

   UTL_SMTP.WRITE_DATA ( CONN, L_MESG );

 /*** START ATTACHING THE FILES ***/
 
   FOR I IN  1..3 LOOP

       EXIT WHEN MESG_LENGTH_EXCEEDED;

       IF FILE_ARRAY(I) IS NOT NULL THEN

          BEGIN

             L_SLASH_POS := INSTR(FILE_ARRAY(I), '/', -1 );

             IF L_SLASH_POS = 0 THEN

                L_SLASH_POS := INSTR(FILE_ARRAY(I), '\', -1 );

             END IF;

             L_DIRECTORY_NAME := SUBSTR(FILE_ARRAY(I), 1, L_SLASH_POS - 1 );

             L_FILE_NAME      := SUBSTR(FILE_ARRAY(I), L_SLASH_POS + 1 );

             RETURN_DESC1     := '50 - E: THERE WAS AN ERROR IN OPENING FILE. ';

             L_FILE_HANDLE    := UTL_FILE.FOPEN(L_DIRECTORY_NAME, L_FILE_NAME, 'R' );

             L_MESG           := CRLF || '--DMW.Boundary.605592468' || CRLF ||
                                 'Content-Type: application/octet-stream; name="' || L_FILE_NAME || '"' || CRLF ||
                                 'Content-Disposition: attachment; filename="' || L_FILE_NAME || '"' || CRLF ||
                                 'Content-Transfer-Encoding: 7bit' || CRLF || CRLF ;

             L_MESG_LEN        := L_MESG_LEN + LENGTH(L_MESG);

             UTL_SMTP.WRITE_DATA ( CONN, L_MESG );

             LOOP

                 RETURN_DESC1  := '60 - E: THERE WAS AN ERROR IN READING FILE. ';
                 
                 UTL_FILE.GET_LINE(L_FILE_HANDLE, L_LINE);

                 IF L_MESG_LEN + LENGTH(L_LINE) > MAX_SIZE THEN

                    L_MESG := '*** truncated ***' || CRLF;

                    UTL_SMTP.WRITE_DATA ( CONN, L_MESG );

                    MESG_LENGTH_EXCEEDED := TRUE;

                    EXIT;

                 END IF;

                 L_MESG := L_LINE || CRLF;

                 UTL_SMTP.WRITE_DATA ( CONN, L_MESG );
   
                 L_MESG_LEN := L_MESG_LEN + LENGTH(L_MESG);

             END LOOP;

          EXCEPTION
             WHEN NO_DATA_FOUND THEN 
                 NULL;

             WHEN UTL_FILE.INVALID_PATH THEN
                 RAISE ABORT_PROGRAM;

             WHEN OTHERS THEN 
                 RAISE ABORT_PROGRAM;

          END;

          L_MESG := CRLF;

          UTL_SMTP.WRITE_DATA ( CONN, L_MESG );

          UTL_FILE.FCLOSE(L_FILE_HANDLE);

        END IF;

   END LOOP;

   RETURN_DESC1  := '70 - E: THERE WAS AN ERROR IN CLOSING MIME BOUNDARY. ';
   
   L_MESG := CRLF || '--DMW.Boundary.605592468--' || CRLF;

   UTL_SMTP.WRITE_DATA ( CONN, L_MESG );

   UTL_SMTP.CLOSE_DATA( CONN );

   UTL_SMTP.QUIT( CONN );

EXCEPTION
  WHEN ABORT_PROGRAM THEN 
      RETURN_DESC := RETURN_DESC1;
  
  WHEN OTHERS THEN 
      RETURN_DESC := RETURN_DESC1;
  
END;