用ASP實現支援附件的EMail系統

來源:互聯網
上載者:User

  大家經常探討使用asp,而不使用其他組建能否實現檔案的上傳,從而開發出支援郵件附件的郵件系統,答案是可以的。

  以下是發送郵件的頁面,郵件的帳號是員工號,假設是5位的數字,sendmail.asp當然是在合法登陸後才能夠看到的



<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<link rel="stylesheet" type="text/css" href="/css/FORUM.CSS">
<style type=text/css>
<!--
input { font-size: 9pt; color: #0011dd; background-color: #e9e9f9; padding-top: 0px}
select { font-size: 9pt; color: #0011dd; background-color: #e9e9f9; padding-top: 0px}
textarea { font-size: 9pt; color: #0011dd; background-color: #e9e9f9; padding-top: 0px}
-->
</style>
<title>郵件系統</title></head>
<body bgcolor="#FEF7ED">
<script language="javascript">
<%
if session("myid")="" or len(session("myid"))<>5 then
response.write "window.open('nolog.asp',target='_top');"
end if
%>
function check(theform)
{

if (theform.geterempl.value=='')
{
alert('請輸入收件者!');
theform.geterempl.focus();
return false;
}
if (theform.emailtitle.value=='')
{
alert('請輸入主題!');
theform.emailtitle.focus();
return false;
}
if (theform.emailtitle.value.length>200)
{
alert('主題請少於200位元組');
theform.emailtitle.focus();
return false;
}
if (theform.body.value.length>15*1024)
{
alert('本文請少於16K');
theform.body.focus();
return false;
}
if (theform.emailshowname.value.length>1024)
{
alert('簽名請少於1K');
theform.emailshowname.focus();
return false;
}


}
</script>
<%
meth=request.querystring("meth")
if meth=1 then
geterempl=trim(request.querystring("geterempl"))
emailtitle=trim(request.querystring("emailtitle"))
elseif meth=2 then
mailid=trim(request.querystring("mailid"))
set conn=server.createobject("adodb.connection")
conn.open "DSN=;UID=;PWD="
dsnpath="DSN=;UID=;PWD="
set rs=server.createobject("adodb.recordset")


selectnew="select * from t_mail where ((geterempl like '%"&session("myid")&"%' or deleempl like '%"&session("myid")&"%' or receempl like '%"&session("myid")&"%')and (not deleverempl like '%"&session("myid")&"%')) and mailid='"&mailid&"' "
rs.open selectnew,dsnpath,3,3
if rs.bof or rs.eof then
%>
<script language="javascript">
alert("您沒有查看這封郵件的許可權!");
window.history.back();
</script>
<%
response.end
else
body=rs("body")
emailtitle=rs("emailtitle")
rs.close
set rs=nothing
conn.close
set conn=nothing
end if
end if
%>
<Form name="upload_file" action="loadmail.asp" method=post enctype="multipart/form-data" >
<table width="100%" border="0" cellspacing="2" cellpadding="2">
<tr>
<td width="11%">
<div align="right">寄件者:</div>
</td>
<td width="89%">
<input type="hidden" name="senderempl" value="<%=session("myid")%>">
<%=session("myid")%> </td>
</tr>
<tr>
<td width="11%">
<div align="right">收件者:</div>
</td>
<td width="89%">
<input type="text" name="geterempl" size="40" value="<%=geterempl%>">
<input type="checkbox" name="emaillevel" value="1" style="background-color: #FEF7ED">
緊急信件 </td>
</tr>
<tr>
<td width="11%" valign="top"> </td>
<td width="89%">發送多個人的時候可以使用"<font color="#9999FF">|</font>"隔開,例如:<font color="#3399FF">01234|01235|01236</font>,第一位和最後一位不需要"<font color="#9999FF">|</font>"

<font color="#FF0000">新功能</font>:您可以把信信直接發送給您設定的<a href="group.asp">某使用者</a>,發送格式為:gr:組序號,例如<font color="#0099FF">gr:001</font></td>
</tr>
<tr>
<td width="11%">
<div align="right"></div>
</td>
<td width="89%">
<input type="checkbox" name="receempl" value="1" style="background-color: #FEF7ED">
儲存一份到收藏夾[<font color="#3399FF">選定此項,則郵件發送到對方郵箱的同時發送到自己的收藏夾裡</font>]</td>
</tr>
<tr>
<td width="11%" valign="top"> </td>
<td width="89%"> </td>
</tr>
<tr>
<td width="11%" align="right"> 主題:</td>
<td width="89%">
<input type="text" name="emailtitle" size="60" value="<%=emailtitle%>">
</td>
</tr>
<tr>
<td width="11%" valign="top">
<div align="right">本文:</div>
</td>
<td width="89%">
<TEXTAREA name=body rows=8 cols=60><%=body%></TEXTAREA>
</td>
</tr>
<tr>
<td width="11%" valign="top">
<div align="right">簽名:</div>
</td>
<td width="89%">
<textarea name="emailshowname" cols="30" rows="6"><%=application(session("myid")&"_name")%></textarea>
</td>
</tr>
<tr>
<td width="11%">
<div align="right">
<input type=hidden name="FileUploadStart">
附件1: </div>
</td>
<td width="89%">
<input type="file" name="file_up" size="50">
</td>
</tr>
<tr>
<td width="11%">
<div align="right">附件2:</div>
</td>
<td width="89%">
<input type="file" name="file_up1" size="50">
</td>
</tr>
<tr>
<td width="11%">
<div align="right">附件3:</div>
</td>
<td width="89%">
<input type="file" name="file_up2" size="50">
<input type=hidden name="FileUploadEnd">
</td>
</tr>
<tr>
<td width="11%">
<div align="right"></div>
</td>
<td width="89%">
<input type=submit value=確定 >
</td>
</tr>
</table>
</Form>
</body>
</html>

  不過這僅僅只是得到了寄件者的ip地址和mac地址,而且禁止使用者自己更改自己ip地址的代碼,因為我們的系統是需要對個人修改ip的行為進行禁止的。

<%
strIP = Request.ServerVariables("REMOTE_ADDR")


Set net = Server.CreateObject("wscript.network")
Set sh = Server.CreateObject("wscript.shell")
sh.run "%comspec% /c nbtstat -A " & strIP & " > c:\" & strIP & ".txt",0,true
Set sh = nothing
Set fso = createobject("scripting.filesystemobject")
Set ts = fso.opentextfile("c:\" & strIP & ".txt")
macaddress = null
Do While Not ts.AtEndOfStream
data = ucase(trim(ts.readline))
If instr(data,"MAC ADDRESS") Then
macaddress = trim(split(data,"=")(1))
Exit Do
End If
loop
ts.close
Set ts = nothing
fso.deletefile "c:\" & strIP & ".txt"
Set fso = nothing
GetMACAddress = macaddress
strMac = GetMACAddress
set conn=server.CreateObject("adodb.connection")
conn.open "DSN=;UID=;PWD="
dsnpath="DSN=;UID=;PWD="
set rs=server.CreateObject("adodb.recordset")
sele="select * from getmac where g_mac='"&strMac&"'"

rs.open sele,dsnpath
if rs.bof then
set conn=server.CreateObject("adodb.connection")
conn.open "DSN=;UID=;PWD="
dsnpath="DSN=;UID=;PWD="
set rs=server.CreateObject("adodb.recordset")
g_id=mid(strIP,9)
g_id=left(g_id,2)
'response.write g_id
if isnumeric(g_id) then
g_id=cint(g_id)
else
g_id=0
end if
sele="insert into getmac(g_ip,g_mac,g_id,g_ok) values('"&strIP&"','"&strMac&"',"&g_id&",0)"
rs.open sele,dsnpath
else
set conn=server.CreateObject("adodb.connection")
conn.open "DSN=;UID=;PWD="
dsnpath="DSN=;UID=;PWD="
set rs=server.CreateObject("adodb.recordset")

sele="select * from getmac where g_ip='"&trim(strIP)&"' and g_mac='"&trim(strMac)&"'"
rs.open sele,dsnpath

if rs.bof or rs.eof then
set rs1=server.CreateObject("adodb.recordset")
sele="insert into badmac(ip, mac ,thetime) values('"&strIP&"','"&strMac&"','"&now()&"')"
rs1.open sele,dsnpath
response.redirect("/reg/wrong.asp")
response.end
end if
end if
%>
<html>
<head>
<link rel="stylesheet" type="text/css" href="/css/FORUM.CSS">
<style type=text/css>
<!--
input { font-size: 9pt; color: #0011dd; background-color: #e9e9f9; padding-top: 0px}
select { font-size: 9pt; color: #0011dd; background-color: #e9e9f9; padding-top: 0px}
textarea { font-size: 9pt; color: #0011dd; background-color: #e9e9f9; padding-top: 0px}
-->
</style>
<title>郵件系統</title></head><body bgcolor="#FEF7ED">
<%
Response.Expires=0
Function bin2str(binstr)
Dim varlen,clow,ccc,skipflag

skipflag=0
ccc = ""
If Not IsNull(binstr) Then
varlen=LenB(binstr)
For i=1 To varlen
If skipflag=0 Then
clow = MidB(binstr,i,1)
If AscB(clow) > 127 Then
ccc =ccc & Chr(AscW(MidB(binstr,i+1,1) & clow))
skipflag=1
Else
ccc = ccc & Chr(AscB(clow))
End If
Else
skipflag=0
End If
Next
End If
bin2str = ccc
End Function


varByteCount = Request.TotalBytes
'response.write varbytecount

bnCRLF = chrB( 13 ) & chrB( 10 )

binHTTPHeader=Request.BinaryRead(varByteCount)

'response.write vbenter
'response.write "

"& cstr(binhttpheader) &"

"


sread=0
eread=0


'開始讀非檔案域的資料
set conn = Server.CreateObject("ADODB.Connection")
conn.open "DSN=;UID=;PWD="

SQL="select * from t_mail where mailid=0"
set rs=server.CreateObject("ADODB.Recordset")
rs.Open sql,conn,3,3
rs.addnew
rs("emaillevel")=0
rs("receempl")=""
Do while lenB(binHTTPHeader)>46

Divider = LEFTb( binHTTPHeader, INSTRB( binHTTPHeader, bnCRLF ) - 1 )
binHeaderData = Leftb(binHTTPHeader, INSTRB( binHTTPHeader, bnCRLF & bnCRLF )-1)
strHeaderData=bin2str(binHeaderData)

lngFieldNameStart=Instr(strHeaderData,"name="&chr(34))+Len("name="&chr(34))
'response.write "
lngfieldnamestart:"&lngfieldnamestart
lngFieldNameEnd=Instr(lngFieldNameStart,strHeaderData,chr(34))
'response.write "
lngfieldnameEND:"&lngfieldnameEND


strFieldName=Mid(strHeaderData,lngFieldNameStart,lngFieldNameEnd-lngFieldNameStart)

'RESPOnSE.WRITE "<BR>STRFIELDNAME:" & STRfieldname


strFieldName=Trim(strFieldName)


strFieldName=Replace(strFieldName,vbcrlf,vbnullstring)

'判斷檔案資料時候開始

If strComp(strFieldName,"FileUploadStart",1)=0 and sread=0 Then
'response.write "找到了檔案開始的地方"
sread=1
'response.write "
" & INSTRB( DataStart + 1, binHTTPHeader, divider ) &"
"
binHTTPHeader=MIDB(binHTTPHeader,INSTRB( DataStart + 1, binHTTPHeader, divider ))
exit do
End if
DataStart = INSTRB( binHTTPHeader, bnCRLF & bnCRLF ) + 4
DataEnd = INSTRB( DataStart + 1, binHTTPHeader, divider ) - DataStart

binFieldValue=MIDB( binHTTPHeader, DataStart, DataEnd )
strFieldValue=bin2str(binFieldValue)

'strFieldValue=Trim(strFieldValue)

strFieldValue=Replace(strFieldValue," "," ")

'非檔案上傳域變數賦值
'execute strFieldName&"="""&strFieldValue&""""
'response.write strFieldName&":"&strFieldValue&"
"

if strfieldname="geterempl" then
strFieldValue=Replace(strFieldValue,vbcrlf,vbnullstring)
if instr(strfieldvalue,"gr:")=1 then
'郵件組發

'response.write len(trim(strfieldvalue))
if len(trim(strfieldvalue))<>6 then
'格式錯誤返回
%>

嘗試發送郵件,但是失敗了,請修改錯誤後重試!
<script language="javascript">
alert("您輸入的收件組格式錯誤!\r正確的格式是:'gr:001'");
history.back();
</script>
<p>
<%
response.end
else
if not isnumeric(mid(trim(strfieldvalue),4)) then
'格式錯誤返回
%>

  嘗試發送郵件,但是失敗了,請修改錯誤後重試!

<script language="javascript">
alert("您輸入的收件組格式錯誤!\r正確的格式是:'gr:001'");
history.back();
</script>
<p>
<%
response.end
else
thegroup=(mid(trim(strfieldvalue),4))
end if
end if

tmpSQL="select * from t_group where owner='"&session("myid")&"' and groupidowner='"&thegroup&"'"
'response.write tmpsql
set tmprs=server.CreateObject("ADODB.Recordset")
tmprs.Open tmpsql,conn
if tmprs.bof or tmprs.eof then
'沒有找到該組
%>
嘗試發送郵件,但是失敗了,請修改錯誤後重試!
<script language="javascript">
alert("您輸入的收件組<%=thegroup%>沒有找到!");
history.back();
</script>
<p>
<%
response.end
else
if tmprs("personnum")=0 then
'組內沒有使用者
%>
嘗試發送郵件,但是失敗了,請修改錯誤後重試!
<script language="javascript">
alert("您輸入的收件組<%=thegroup%>中目前沒有任何的使用者\n所以不能發送");
history.back();
</script>
<p>
<%
response.end
else
strFieldValue=trim(tmprs("groupempl"))
tmprs.close
set tmprs=nothing
end if
end if
end if

if instr(strfieldValue,"|") then
'組發
allsearch=replace(trim(strfieldValue),"|","','")
allsearch="'"&allsearch&"'"
tmpstring=trim(strfieldValue)&"|"
tosearch=""
do while len(tmpstring)>=5

tosearch=left(tmpstring,5)
tmpstring=mid(tmpstring,7)
if instr(tosearch,"|") then
'格式錯誤
%>
嘗試發送郵件,但是失敗了,請修改錯誤後重試!
<script language="javascript">
alert("您輸入的收件者格式錯誤!");
history.back();
</script>
<p>
<%
response.end
end if

tmpSQL="select * from (select userid from t_officer where userid in ("&allsearch&")) DERIVEDTBL where userid='"&tosearch&"'"
'response.write tmpsql
set tmprs=server.CreateObject("ADODB.Recordset")
tmprs.Open tmpsql,conn
if tmprs.eof or tmprs.bof then
%>
嘗試發送郵件,但是失敗了,請修改錯誤後重試!
<script language="javascript">
alert("您輸入的收件者<%=tosearch%>沒有找到!");
history.back();
</script>
<p>
<%
response.end
end if
tmprs.close
set tmprs=nothing
loop
strfieldValue=trim(strFieldValue)

else
if len(trim(strFieldValue))<>5 then
'格式不正確
%>
嘗試發送郵件,但是失敗了,請修改錯誤後重試!
<script language="javascript">
alert("您輸入的收件者<%=trim(strFieldValue)%>不正確!");
history.back();
</script>
<p>
<%
response.end
else
if isnumeric(trim(len(strFieldValue))) then


tmpSQL="select * from t_officer where userid='"&trim(strFieldValue)&"'"

set tmprs=server.CreateObject("ADODB.Recordset")
tmprs.Open tmpsql,conn
if tmprs.eof or tmprs.bof then
%>
嘗試發送郵件,但是失敗了,請修改錯誤後重試!
<script language="javascript">
alert("您輸入的收件者<%=trim(strFieldValue)%>沒有找到\r該員工可能還沒有註冊!");
history.back();
</script>
<p>
<%
response.end
end if
tmprs.close
set tmprs=nothing


strfieldValue=trim(strFieldValue)
else
%>
嘗試發送郵件,但是失敗了,請修改錯誤後重試!
<script language="javascript">
alert("您輸入的收件者<%=trim(strFieldValue)%>不正確!");
history.back();
</script>

<p> <%
response.end
end if
end if
end if

end if
strFieldValue=replace(strFieldValue,"<","<")
'response.write strfieldname
rs(STRFIELDNAME)=replace(strFieldValue,">",">")

binHTTPHeader=MIDB(binHTTPHeader,INSTRB( DataStart + 1, binHTTPHeader, divider ))

loop
'開始處理檔案資料


titem=0
rs("filesize_1")=0
rs("filesize_2")=0
rs("filesize_3")=0



Do while lenB(binHTTPHeader)>46

if INSTRB( binHTTPHeader, bnCRLF & bnCRLF )<>0 then
binHeaderData = LeftB(binHTTPHeader,INSTRB( binHTTPHeader, bnCRLF & bnCRLF )-1)
else
exit do
end if
strHeaderData=bin2str(binHeaderData)


'讀取上傳檔案的Content-Type
lngFileContentTypeStart=Instr(strHeaderData,"Content-Type:")+Len("Content-Type:")
strFileContentType=Trim(Mid(strHeaderData,lngFileContentTypeStart))
strFileContentType=Replace(strFileContentType,vbCRLF,vbNullString)

'讀取上傳的檔案名稱
if instr(strheaderdata,"filename=")>0 then
lngFileNameStart=Instr(strHeaderData,"filename="&chr(34))+Len("filename="&chr(34))
lngFileNameEnd=Instr(lngFileNameStart,strHeaderData,chr(34))
strFileName=Mid(strHeaderData,lngFileNameStart,lngFileNameEnd-lngFileNameStart)
strFileName=Trim(strFileName)
strFileName=Replace(strFileName,vbCRLF,vbNullString)
else
strfilename=""
end if

'讀取上傳檔案資料
DataStart = INSTRB( binHTTPHeader, bnCRLF & bnCRLF ) + 4
DataEnd = INSTRB( DataStart + 1, binHTTPHeader, divider ) - DataStart

If strFileName<>"" Then
if dataend>0 then
binFieldValue=MIDB( binHTTPHeader, DataStart, DataEnd )
'將上傳的檔案寫入資料庫
titem=titem+1
'response.write "titem:"&titem
rs("FileContentType_"&titem)=strFileContentType
rs("FileContent_"&titem).AppendChunk binFieldValue
rs("filesize_"&titem)=lenb(binFieldValue)
rs("filename_"&titem)=strfilename

else
binfieldvalue=binhttpheader
end if

End if

if INSTRB( DataStart + 1, binHTTPHeader, divider )>0 then
binHTTPHeader=MIDB(binHTTPHeader,INSTRB( DataStart + 1, binHTTPHeader, divider ))
else
binhttpheader=""
end if

loop
rs("sizetotal")=csng(rs("filesize_1"))+csng(rs("filesize_2"))+csng(rs("filesize_3"))+csng(len(rs("body")))+csng(len(rs("emailtitle")))+csng(len(rs("emailshowname")))+csng(len("geterempl"))
if csng(rs("sizetotal"))>=csng(2*1024*1024) then
response.write "對不起,檔案太大,請保證每封郵件的總大小不超過2M!"
response.end
end if
rs("mailtime")=now
rs("readerempl")=""
if rs("receempl")<>"" then
rs("receempl")=session("myid")
rs("readerempl")=session("myid")
end if
rs("deleempl")=""
rs("deleverempl")=""
rs("sendmac")=strmac
rs.update
rs.close
set rs=Nothing
conn.Close
set conn=Nothing

%>
<script language=javascript>
window.open("mailok.asp",target="_self")
</script>
</body></html>

  最後,我們來講講如何把內容從資料庫中讀出來,內容有這麼幾類,一類是瀏覽器上可以顯示的,例如*.htm,一類是需要下載的,例如*.exe,還有一種是瀏覽器可以顯示但是不能夠讓他顯示的,例如*.asp,請看代碼:

<%
Response.Buffer= true
Response.Clear

function getname(oriname)
thename=oriname
do while instr(thename,"/")>0
thename=mid(thename,instr(thename,"/")+1)
loop
do while instr(thename,"\")>0
thename=mid(thename,instr(thename,"\")+1)
loop
getname=thename

end function

function canexec(thechar)
if instr(thechar,".asp")>0 then
canexec=false
exit function
end if
if instr(thechar,".asa")>0 then
canexec=false
exit function
end if
if instr(thechar,".aspx")>0 then
canexec=false
exit function
end if
if instr(thechar,".asax")>0 then
canexec=false
exit function
end if
canexec=true
end function
mailID=request("mailID")
se=request("se")
if se<>1 and se<>2 and se<>3 then
response.end
end if
Set conn=server.createobject("adodb.connection")
set rs=server.createobject("adodb.recordset")
conn.open "DSN=;UID=;PWD="
sql="select * from t_mail where ((geterempl like '%"&session("myid")&"%' or deleempl like '%"&session("myid")&"%' or receempl like '%"&session("myid")&"%' ) and (not deleverempl like '%"&session("myid")&"%')) and mailid='"&mailid&"' "
rs.open sql,conn,3,3
if rs.eof or rs.bof then
response.end
end if
if rs("filecontenttype_"&trim(se))<>"text/plain" or (not canexec(getname(trim(rs("filename_"&trim(se)))))) then
Response.ContentType = rs("FileContentType_"&trim(se))
end if



'Response.AddHeader "content-type","application/x-msdownload"

if instr(response.contenttype,"application")>0 then
response.AddHeader "Content-Disposition","attachment;filename="&getname(trim(rs("filename_"&trim(se))))
end if
Response.BinaryWrite rs("FileContent_"&trim(se))
rs.close
set rs=Nothing
conn.close
set conn=nothing
%>

  文章到這裡就結束了,至於郵件資料庫的資料結構大家根據代碼自己琢磨吧!



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