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pop_dnld.c

/* $Id: //depot/Teapop/0.3/teapop/pop_dnld.c#7 $ */

/*
 * Copyright (c) 1999-2002 ToonTown Consulting
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the company nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <sys/types.h>

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "config.h"
#include "teapop.h"
#include "pop_dnld.h"
#include "pop_socket.h"
#include "pop_strings.h"

void
pop_dnldmsg(pinfo, msg, lines)
      POP_INFO *pinfo;
      unsigned long msg, lines;
{
      unsigned long counter;
      register unsigned long linesleft;
      register unsigned int addcr, len;
      char buf[1024];

      POP_MSG *curmsg;

      curmsg = pinfo->firstmsg;
      for (counter = 1UL; counter < msg && curmsg != NULL; counter++)
            curmsg = curmsg->nextmsg;

      /*
       * If user requested message 0 or a message that doesn't exist,
       * whine some and bail out message downloading.
       */
      if (curmsg == NULL || msg <= 0UL) {
            pop_socket_send(pinfo->out, "%s %s", POP_ERR, POP_MSG_NONE);
            return;
      }

      /*
       * If the user already flagged the message for deletion, whine
       * and then bail out the message downloading.
       */
      if (curmsg->flags & MSG_DELETED) {
            pop_socket_send(pinfo->out, "%s %s", POP_ERR, POP_MSG_GONE);
            return;
      }

      /*
       * mbox and Maildir use different ways to get to the message
       * that the user wants to download (duh), but the actual sending
       * is the same. Here we find the message...
       */
      if (pinfo->mboxtype == 0) {
            /* mbox */
            if ((fseek(pinfo->mbox,(long)curmsg->offset,SEEK_SET)) != 0) {
                  pop_socket_send(pinfo->out, "%s %s", POP_ERR,
                      POP_PROBLEM);
                  return;
            }
      } else {
            /* Maildir */
            if ((pinfo->mbox = fopen(curmsg->file, "r")) == NULL) {
                  pop_socket_send(pinfo->out, "%s %s", POP_ERR,
                      POP_PROBLEM);
                  return;
            }
      }

      /* Tell user the message is coming now */
      pop_socket_send(pinfo->out, "%s %lu", POP_OK, curmsg->size);

      /* Print Headers */
      linesleft = curmsg->lines;
      while (fgets(buf, sizeof(buf), pinfo->mbox)) {
            if (linesleft <= 0UL)
                  break;
            len = strlen(buf);
            /* To read CRLF files like LF only files**/
            if ((len >= 2) && (buf[len-2] == '\r') && (buf[len-1] == '\n')) {
                buf[len-2] = '\n';
                buf[len-1] = '\0';
                len = len-1;
            }
            /* If there's a NULL in the message, replace it with a ? */
            if (buf[len-1] != '\n' && len != (sizeof(buf)-1)) {
                  buf[len] = '?';
                  len = strlen(buf);
            }

            if (buf[len-1] == '\n') {
                  addcr = 1;
                  buf[len-1] = '\0';
            } else
                  addcr = 0;

            /*
             * If line starts with the termination octet, a dot,
             * send a dot first, as per RFC, followed by the line.
             */
            if (buf[0] == '.')
                  (void)fputs(".", pinfo->out);
            pop_socket_rawsend(pinfo->out, buf);
            if (addcr == 1) {
                  pop_socket_rawsend(pinfo->out, "\r\n");
                  linesleft--;
            }
            if (buf[0] == '\0')
                  break;
      }

      if (lines != 0UL && linesleft >= lines)
            linesleft = lines - 1UL;
      else if (lines == 0UL || pinfo->autodelete == 2)
            curmsg->flags = curmsg->flags | MSG_READ;

      /* Now print body */
      while (fgets(buf, sizeof(buf), pinfo->mbox)) {
            if (linesleft <= 0UL)
                  break;
            len = strlen(buf);
            /* To read CRLF files like LF only files**/
            if ((len >= 2) && (buf[len-2] == '\r') && (buf[len-1] == '\n')) {
                buf[len-2] = '\n';
                buf[len-1] = '\0';
                len = len-1;
            }
            /* If there's a NULL in the message, replace it with a ? */
            if (buf[len-1] != '\n' && len != (sizeof(buf)-1)) {
                  buf[len] = '?';
                  len = strlen(buf);
            }
            if (buf[len-1] == '\n') {
                  addcr = 1;
                  buf[len-1] = '\0';
            } else
                  addcr = 0;
            /*
             * If line starts with the termination octet, a dot,
             * send a dot first, as per RFC, followed by the line.
             */
            if (buf[0] == '.')
                  (void)fputs(".", pinfo->out);
            pop_socket_rawsend(pinfo->out, buf);
            if (addcr == 1) {
                  pop_socket_rawsend(pinfo->out, "\r\n");
                  linesleft--;
            }
      }

      pop_socket_send(pinfo->out, ".");
      (void)fflush(pinfo->out);

      /* If we are using Maildir, close the message. */
      if (pinfo->mboxtype == 1)
            (void)fclose(pinfo->mbox);
}

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