ASP 本身不支援動態包含文件,現在的動態包含是透過FSO 把被包含的文件合併到主文件裡再運行。以下也有把形如<!--#include file="filename.asp" --> 的普通包含檔案方式稱為“傳統引用”,用函數實現的動態包含檔案稱為“動態引用”。常見的程式如下:
Function include(filename)
Dim re,content,fso,f,aspStart,aspEnd
set fso=CreateObject("Scripting.FileSystemObject")
set f=fso.OpenTextFile(server.mappath(filename))
content=f.ReadAll
f.close
set f=nothing
set fso=nothing
set re=new RegExp
re.pattern="^s*="
aspEnd=1
aspStart=inStr(aspEnd,content,"<%")+2
do while aspStart>aspEnd+1
Response.write Mid(content,aspEnd,aspStart-aspEnd-2)
aspEnd=inStr(aspStart,content,"%>")+2
Execute(re.replace(Mid(content,aspStart,aspEnd-aspStart-2),"Response.Write "))
aspStart=inStr(aspEnd,content,"<%")+2
loop
Response.write Mid(content,aspEnd)
set re=nothing
End Function
使用範例:include("youinc.asp")
但這處函數在處理補包含的檔案中還有包含檔案時就不靈了。我在以上函數的基礎上改進如下函數,在被包含檔案中還有普通的包含檔案<!--#include file="filename.asp" --> 也可正常運作。
Function includeconvert(oRegExp, strFilename, strBlock)
Dim incStart, incEnd, match, oMatches, str, code
'用提取ASP程式碼的相同方式提取出include 部分的檔名,其餘部分原樣輸出
code = ""
incEnd = 1
incStart = InStr(incEnd,strBlock,"<!--#include ") + 13 '要找個目標字串<!--#include 剛好是13個字符,所以要+13
Do While incStart>incEnd+12 '兩個引用間距最小就是連續的--><--#,incStart是從<!--#include起數13個字符,所以要比前一個incEnd至少多13- 1 得到的>incEnd+12的條件
str = Mid(strBlock,incEnd,incStart-incEnd-13)
str = Replace(str, """", """""") '將單一雙引號換成兩個雙引號
str = Replace(str, VbCr, "")
str = Replace(str, VbLf, "")
str = Replace(str, VbCrLf, "")
code = code & VbCrLf & "Response.Write """ & str & """"
incEnd=InStr(incStart,strBlock,"-->")+3
oRegExp.pattern="(w+)=""([^""]+)""" '符合file="filename.ext" 或virtual="virtualname.ext",捕捉類型及檔案名稱兩個子串
Set oMatches = oRegExp.Execute(Mid(strBlock,incStart,incEnd-incStart-3))
Set match = oMatches(0) '確定只有一組捕捉時,要得到這一組相符的子字串,可以這樣做,省去用For Each match In oMatches … Next
code = code & include(Mid(strFilename, 1, InStrRev(strFilename, "/")) & match.SubMatches(1)) 'Mid(filename, 1, InStrRev(filename, "/")) 是在被引用的子檔名有路徑時,把路徑提取出來,加在子文件中傳統引用的文件名前面,以找到正確的打開文件路徑,因為動態引用時的文件路徑是相對主文件而言的。要第二個匹配子字串用SubMatches(1)
incStart = InStr(incEnd,strBlock,"<!--#include ")+13
Loop
str = Mid(strBlock,incEnd)
str = Replace(str, """", """""") '將單一雙引號換成兩個雙引號
str = Replace(str, VbCr, "")
str = Replace(str, VbLf, "")
str = Replace(str, VbCrLf, "")
code = code & VbCrLf & "Response.Write """ & str & """"
includeconvert = code
End Function
Function include(filename)
Dim re, content, fso, f, aspStart, aspEnd, code
Set fso=CreateObject("scripting.FileSystemObject")
Set f=fso.OpenTextFile(Server.MapPath(filename))
content=f.ReadAll
f.close
Set f=nothing
Set fso=nothing
code = ""
aspEnd=1
aspStart=InStr(aspEnd,content,"<%")+2
Set re=new RegExp
Do While aspStart>aspEnd+1
'傳統引用<!--#inclde 肯定是在ASP程式碼段以外的,所以先轉。
code = code & includeconvert (re, filename, Mid(content,aspEnd,aspStart-aspEnd-2))
aspEnd=InStr(aspStart,content,"%>")+2
re.pattern="^s*=" '這段正規替換原來是把<% = str % > 換回成標準的<%Response.Write str % >
code = code & VbCrLf & re.replace(Mid(content,aspStart,aspEnd-aspStart-2),"Response.Write ") 'ASP塊前面再加回車換行,以避免連接塊之間多個Response.Write在同一行的錯誤
aspStart=InStr(aspEnd,content,"<%")+2
Loop
code = code & includeconvert (re, filename, Mid(content,aspEnd))
Set re=nothing
include = code
End Function
方便起見,以上函數最終回傳的是整合了包含檔案的整個ASP 程式碼,使用時還要再用Execute 執行之,即使用時需要:Execute(include("file.asp"))。
以上函數對被包含文件與主文件同一路徑時測試通過,未對被包含文件與主文件路徑不同的情況做進一步容錯,時間有限,歡迎有興趣的朋友提出意見與改進。