asp基于目录的虚拟主机ASP虚拟主机如何防图片盗链

asp基于目录的虚拟主机时间:2022-02-07 阅读:()

asp实现某个功能。谢谢各位了。不能操作服务器，是虚拟主机

<% if Request.ServerVariables("SERVER_NAME")="" then response.redirect "/news/index.asp" else response.redirect "/news/" end if %>

ASP虚拟主机如何防图片盗链

· 我们在管理网站文件时，能把扩展名相同的文件放在同一个目录下，起一个比较特别名字，例如放pdf文件目录为the_pdf_file_s，把下面代码另存为down.asp，他的网上路径为 /down.asp，我们就能用// /down.asp?FileName=51windows.pdf来下载这个文件了，而且下载者无法看到这个文件实际下载路径的！在down.asp中我们还能设置下载文件是否需要登陆，判断下载的来源页是否为外部网站，从而能做到防止文件被盗链。示例代码：

以下是引用片段：

以下是引用片段： <% From_url = Cstr(Request.ServerVariables("HTTP_REFERER")) Serv_url = Cstr(Request.ServerVariables("SERVER_NAME")) if mid(From_url,8,len(Serv_url)) <> Serv_url then response.write "非法链接！" ’防止盗链 response.end end if if Request.Cookies("Logined")="" then response.redirect "/login.asp" ’需要登陆！ end if Function GetFileName(longname)’/folder1/folder2/file.asp=>file.asp while instr(longname,"/") longname = right(longname,len(longname)-1) wend GetFileName = longname End Function Dim Stream Dim Contents Dim FileName Dim TrueFileName Dim FileExt Const adTypeBinary = 1 FileName = Request.QueryString("FileName") if FileName = "" Then Response.Write "无效文件名！" Response.End End if FileExt = Mid(FileName, InStrRev(FileName, ".") + 1) Select Case UCase(FileExt) Case "ASP", "ASA", "ASPX", "ASAX", "MDB" Response.Write "非法操作！" Response.End End Select Response.Clear if lcase(right(FileName,3))="gif" or lcase(right(FileName,3))="jpg" or lcase(right(FileName,3))="png" then Response.ContentType = "image/*" ’对图像文件不出现下载对话框 else Response.ContentType = "application/ms-download" end if Response.AddHeader "content-disposition", "attachment; filename=" & GetFileName(Request.QueryString("FileName")) Set Stream = server.CreateObject("ADODB.Stream") Stream.Type = adTypeBinary Stream.Open if lcase(right(FileName,3))="pdf" then ’设置pdf类型文件目录 TrueFileName = "/the_pdf_file_s/"&FileName end if if lcase(right(FileName,3))="doc" then ’设置DOC类型文件目录 TrueFileName = "/my_D_O_C_file/"&FileName end if if lcase(right(FileName,3))="gif" or lcase(right(FileName,3))="jpg" or lcase(right(FileName,3))="png" then TrueFileName = "/all_images_/"&FileName ’设置图像文件目录 end if Stream.LoadFromFile Server.MapPath(TrueFileName) While Not Stream.EOS Response.BinaryWrite Stream.Read(1024 * 64) Wend Stream.Close Set Stream = Nothing Response.Flush Response.End %>

本地图片，音乐等ASP防盗链代码(asp) 以下是引用片段：

以下是引用片段： <% ’定义函数，用ADODB.Stream读取二进制数据 Function ReadBinaryFile(FileName) Const adTypeBinary = 1 Dim BinaryStream Set BinaryStream = CreateObject("ADODB.Stream") BinaryStream.Type = adTypeBinary BinaryStream.Open BinaryStream.LoadFromFile FileName ReadBinaryFile = BinaryStream.Read End Function Response.AddHeader "Content-Disposition", "attachment;filename=2.gif"’文件名 Response.ContentType = "image/GIF" ’设置（1） response.Binarywrite ReadBinaryFile(server.mappath("2.gif"))’就是你读取存在本地的文件，防止被别人知道真实路径盗连的。 %>

这希望对你有所帮助！！！

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