save.cpp

一个国外学生做的基于Web浏览器的email程序

						//default on, in case there is no
						// content-type
						if (attachcount < 100)
						{
							attachcount++;
							attachname[attachcount] = new char[500]; 			
							//strncpy(attachname[attachcount], data, 499); 	
							snprintf(attachname[attachcount],499, "          mime attachment %d", attachcount);
							attachname[attachcount][499] = '\0';  
						}
		 			}
					if (onmimeheader && (
					finddata(data, "filename=", answer) != NULL))
					{
						//is this safe???
						//has memory been defined already???
						strncpy(attachname[attachcount], "          ", 499);
						strncpy(attachname[attachcount]+10, answer, 489);
					}

					if (onmimeheader && (
					strncasecmp(data, "Content-Type: text/plain",24)==0 ||
					strncasecmp(data, "Content-Type: message/delivery-status",37)==0
					))
					{
						//turn on display, or 
						//really leave on
						dontdisplay = 0; 
					}
					else if (onmimeheader &&
					strncasecmp(data, "Content-Type: ", 14) == 0)
					{
						//unknown type, turn off display
						dontdisplay = 1;
					}
					else {}

				}
				else if (USEATTACHMENTS && !ismime)
				{
				  	if (strncasecmp(data, "end", 3) ==0)
						dontdisplay = 0;
				}
				else {}

				//displays message
				if (USEATTACHMENTS && 
				dontdisplay == 0 && onmimeheader == 0)
				{	cout << data;} //ok to display
				else if (USEATTACHMENTS)
				{} //not ok to display
				else
				{	cout << data;} //not in attachment mode ok to dis

				//turns off message display
				if (USEATTACHMENTS && ismime)
				{
					if (onmimeheader && strncmp(data, "\n", 1) == 0)
					{
						onmimeheader = 0;
					}
				}
				else if (USEATTACHMENTS && !ismime)
				{
					if (strncmp(data, "begin ", 6)==0)
					{
						dontdisplay = 1;
						if (attachcount < 100)
						{
							attachcount++;
							cout << "Attached file removed from display." << endl;
							attachname[attachcount] = new char[500];
							strncpy(attachname[attachcount], data, 499);
							attachname[attachcount][499] = '\0'; 
						}
				    	}
				}
				else {}
			} // off header
		}//attach count == num
	} //while




	cout << "</textarea></form>" << endl;
	cout << "</td></tr></table>";

	if (USEATTACHMENTS)
	{
	 if (attachcount > 0)
	 {
		cout << "<font size=\"+2\"><u>";
 		cout << WEM_Attachments << "</u></font><br>";
		if (ismime)
		{
			attachcount--; //lower count because last break gets counted
		}

		
		for (int loop = 1; loop <= attachcount; loop++)
		{
			cout << "<a href=\"" << "./attachments/";
			cout << cleanfilename(attachname[loop]+10);

			if (ismime)
				cout << "?mshowsavedattach=" << number << "x";
			else
				cout << "?showsavedattach=" << number << "x";

			cout << loop << "\">";
			cout << attachname[loop]+10;
			cout << "</a><br>";
			delete(attachname[loop]);
		}
		cout << "<br>";
	 }
	}

	tail();	
	bothunlock(mailstore);
	fclose(mailstore);

	cout << "</body></HTML>" << endl;
	return;
}
void deletesaved()
{
	char *env;
	int mailnum;
	char mailbox[400];
	passwd *info;
	
	if ((env = getenv("QUERY_STRING"))==NULL)
	{
		disjavascript("?menusaved", "delete error", "menu");
		return;
	}

	mailnum = atoi(env+12);
	info=getpwnam(globaluser);
	snprintf(mailbox, 400, "%s/.webmail/saved", info->pw_dir);

	deletemail(mailbox, mailnum);  
	disjavascript("?menusaved", "Saved mail delete", "menu");
}
void multidelsaved()
{
	char data;
	char number[10];
	vector <int> todel;

	int i = 0;
	int mark = 0;
	int k =0;

	while (1)
	{
		data = fgetc(stdin);
		if (data == EOF)
			break;

		if (data == '=')
		{
			mark = 0;
			number[k] = '\0';
			k = 0;
			//cout << atoi(number) << endl;
			todel.push_back(atoi(number));
		}
		
		if (mark == 1)
		{
			number[k] = data;
			k++;
		}

		if (data == 'm')
		{
			mark=1;
			k=0;
		}
	}
	multideletemailsaved(todel);
	return;
}
void multideletemailsaved(vector<int>& todel)
{
	passwd *info;
	FILE *data;
	FILE *tmp;
	char dataname[400];
	char tmpname[400];
	char buf[500];
	int number = 0;
	int emailcount = 0;
	int delme = 0;

	info=getpwnam(globaluser);
	snprintf(dataname, 400, "%s/.webmail/saved", info->pw_dir);

	snprintf(tmpname, 400, "%s/.webmail/tmp", info->pw_dir);
	
	data = fopen(dataname, "r");
	if (data == NULL)
	{
		error("multideletemailsaved():Error opening data for read");
		return;
	}
	if (bothlock(data, 'r')!=0)
	{
		fclose(data);
		error("multideletemailsaved():Error locking data for read");
		return;
	}
	tmp = fopen(tmpname, "w");
	if (tmp == NULL)
	{
		error("multideletemailsaved():error opening temp for write");
		fclose(data);
		return;
	}
	if (bothlock(tmp, 'w')!=0)
	{
		fclose(data);
		fclose(tmp);
		error("multideletemailsaved():Error locking tmp for write");
		return;
	}
	while (fgets(buf, 499, data) != NULL)
	{
		fputs(buf, tmp);
	}
	bothunlock(data);
	fclose(data);
	bothunlock(tmp);
	fclose(tmp);

	//rename(dataname, tmpname);
	sync();

	data = fopen(dataname, "w");
	if (data == NULL)
	{
		error("multideletemailsaved():Error opening data for write");
		return;
	}
	if (bothlock(data, 'w')!=0)
	{
		fclose(data);
		error("multideletemailsaved():Error locking data for write");
		return;
	}
	tmp = fopen(tmpname, "r");
	if (tmp == NULL)
	{
		error("multideletemailsaved():error opening temp for read");
		fclose(data);
		return;
	}
	if (bothlock(tmp, 'r')!=0)
	{
		fclose(data);
		fclose(tmp);
		error("multideletemailsaved():Error locking temp for read");
		return;
	}
	
	while (fgets(buf, 499, tmp) != NULL)
	{
		if (strncmp(buf, "From ", 5)==0)
		{
			emailcount++;
			delme = 0;
			for (int p = 0; p<todel.size();p++)
			{
				if (emailcount == todel[p])
				{
					delme = 1;
				}
			}
		}
		if (delme == 0)
		{
			fputs(buf, data);
		}
	}

	bothunlock(tmp);
	fclose(tmp);
	bothunlock(data);
	fclose(data);
	remove(tmpname);
	sync();

	disjavascript("?dissaved#bottom", "Mail deleted", "mail list");

	return;
}
void showsavedattach()
{

	char *env;
	char *env2;
	int loop = 16;
	int attachnum;
	int mailnum;
	char mailbox[400];
	passwd *info;
	
	if ((env = getenv("QUERY_STRING"))==NULL)
	{
		disjavascript("?menusaved", "Attach display error", "menu");
		return;
	}

	while (env[loop] != '\0')
	{
		if (env[loop] == 'x')
		{
			env[loop] = '\0';
			env2=env+loop+1;
			
		}
		loop++;
	}
	attachnum = atoi(env2);
	mailnum = atoi(env+16);
	info=getpwnam(globaluser);
	snprintf(mailbox, 400, "%s/.webmail/saved", info->pw_dir);

	showattachment(mailbox, mailnum, attachnum);	
}
void mshowsavedattach()
{
	char *env;
	char *env2;
	int loop = 17;
	int attachnum;
	int mailnum;
	char mailbox[400];
	passwd *info;
	
	if ((env = getenv("QUERY_STRING"))==NULL)
	{
		disjavascript("?menusaved", "Attach display error", "menu");
		return;
	}

	while (env[loop] != '\0')
	{
		if (env[loop] == 'x')
		{
			env[loop] = '\0';
			env2=env+loop+1;
			
		}
		loop++;
	}
	attachnum = atoi(env2);
	mailnum = atoi(env+17);
	info=getpwnam(globaluser);

	snprintf(mailbox, 400, "%s/.webmail/saved", info->pw_dir);

	mshowattachment(mailbox, mailnum, attachnum);
}