2022年用Asp隐藏文件路径实现防盗链.docx

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1、2022年用Asp隐藏文件路径实现防盗链假如我们知道一个静态文件的实际路径如：我们在管理网站文件时，可以把扩展名一样的文件放在同一个书目下，起一个比较特殊名字，例如放pdf文件书目为the_pdf_file_s，把下面代码另存为down.asp，他的网上路径为示例代码：<%From_url = Cstr(Request.ServerVariables(HTTP_REFERER)Serv_url = Cstr(Request.ServerVariables(SERVER_NAME)if mid(From_url,8,len(Serv_url) <> Serv_url thenr

2、esponse.write 非法链接！ 防止盗链response.endend ifif Request.Cookies(Logined)= thenresponse.redirect /login.asp 须要登陆！end ifFunction GetFileName(longname)/folder1/folder2/file.asp=>file.aspwhile instr(longname,/)longname = right(longname,len(longname)-1)wendGetFileName = longnameEnd FunctionDim StreamDim

3、ContentsDim FileNameDim TrueFileNameDim FileExtConst adTypeBinary = 1FileName = Request.QueryString(FileName)if FileName = ThenResponse.Write 无效文件名！Response.EndEnd ifFileExt = Mid(FileName, InStrRev(FileName, .) + 1)Select Case UCase(FileExt)Case ASP, ASA, ASPX, ASAX, MDBResponse.Write 非法操作！Response

4、.EndEnd SelectResponse.Clearif lcase(right(FileName,3)=gif or lcase(right(FileName,3)=jpg or lcase(right(FileName,3)=png thenResponse.ContentType = image/* 对图像文件不出现下载对话框elseResponse.ContentType = application/ms-downloadend ifResponse.AddHeader content-disposition, attachment; filename= GetFileName(R

5、equest.QueryString(FileName)Set Stream = server.CreateObject(ADODB.Stream)Stream.Type = adTypeBinaryStream.Openif lcase(right(FileName,3)=pdf then 设置pdf类型文件书目TrueFileName = /the_pdf_file_s/FileNameend ifif lcase(right(FileName,3)=doc then 设置DOC类型文件书目TrueFileName = /my_D_O_C_file/FileNameend ifif lca

6、se(right(FileName,3)=gif or lcase(right(FileName,3)=jpg or lcase(right(FileName,3)=png thenTrueFileName = /all_images_/FileName 设置图像文件书目end ifStream.LoadFromFile Server.MapPath(TrueFileName)While Not Stream.EOSResponse.BinaryWrite Stream.Read(1024 * 64)WendStream.CloseSet Stream = NothingResponse.FlushResponse.End%>