ASP如何上传文件到服务器？详细步骤与注意事项一览无遗？

{asp如何上传}

ASP简介

ASP（Active Server Pages）是一种服务器端脚本环境，它允许用户使用VBScript、JScript或PerlScript等脚本语言来创建动态交互式网页，ASP的主要优势在于其简单易用和强大的功能，能够实现网页与数据库的交互,为用户提供更加丰富的用户体验。

ASP上传功能介绍

ASP上传功能主要指的是通过ASP脚本实现客户端上传文件到服务器端的过程,以下是上传功能的基本流程：

1. 客户端用户选择文件并提交表单；
2. 服务器端接收到上传请求,并读取客户端提交的文件；
3. 服务器端对上传的文件进行验证，如文件类型、大小等；
4. 服务器端将验证通过的文件存储到指定的目录。

ASP上传实现方法

以下是一个简单的ASP上传示例：

创建一个HTML表单,用于提交文件：

在upload.asp文件中,编写ASP脚本实现文件上传功能：

<%
Set fso = Server.CreateObject("Scripting.FileSystemObject")
Set req = Server.CreateObject("ADO.Stream")
If Request.Files("file") Is Nothing Then
  Response.Write "未选择文件！"
  Exit Function
End If
Set file = Request.Files("file")
req.Open
req.Write file.InputStream
req.SaveToFile Server.MapPath("uploads\" & file.FileName)
req.Close
Response.Write "文件上传成功！"
%>

上传文件验证

为了确保上传文件的安全性，需要对上传的文件进行验证,以下是一些常见的验证方法：

验证文件类型：通过检查文件扩展名或文件头信息,确定文件类型是否符合要求。

Dim ext
ext = LCase(Right(file.FileName, 3))
If ext <> "jpg" And ext <> "png" And ext <> "gif" Then
  Response.Write "不支持上传此类型的文件！"
  Exit Function
End If

验证文件大小：限制上传文件的大小,防止服务器资源被过度占用。

If file.ContentLength > 1024 * 1024 * 2 Then '限制文件大小为2MB
  Response.Write "文件过大，请重新上传！"
  Exit Function
End If

验证文件名：避免文件名中包含特殊字符,防止文件路径被篡改。

Dim filename
filename = Replace(file.FileName, "/", "")
filename = Replace(filename, "\", "")
filename = Replace(filename, "..\", "")
filename = Replace(filename, ".", "")
filename = Replace(filename, "?", "")
filename = Replace(filename, "*", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, ":", "")
filename = Replace(filename, "/", "")
filename = Replace(filename, "\", "")
filename = Replace(filename, "?", "")
filename = Replace(filename, "*", "")
filename = Replace(filename, ":", "")
filename = Replace(filename, "%", "")
filename = Replace(filename, "&", "")
filename = Replace(filename, "#", "")
filename = Replace(filename, "+", "")
filename = Replace(filename, "=", "")
filename = Replace(filename, "", "")
filename = Replace(filename, "~", "")
filename = Replace(filename, "`", "")
filename = Replace(filename, "|", "")
filename = Replace(filename, "{", "")
filename = Replace(filename, "}", "")
filename = Replace(filename, "[", "")
filename = Replace(filename, "]", "")
filename = Replace(filename, "^", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, ".", "")
filename = Replace(filename, ",", "")
filename = Replace(filename, ";", "")
filename = Replace(filename, "@", "")
filename = Replace(filename, "!", "")
filename = Replace(filename, "$", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, "_", "")
filename = Replace(filename, "(", "")
filename = Replace(filename, ")", "")
filename = Replace(filename, ":", "")
filename = Replace(filename, "*", "")
filename = Replace(filename, "?", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, ".", "")
filename = Replace(filename, ",", "")
filename = Replace(filename, ";", "")
filename = Replace(filename, "@", "")
filename = Replace(filename, "!", "")
filename = Replace(filename, "$", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, "_", "")
filename = Replace(filename, "(", "")
filename = Replace(filename, ")", "")
filename = Replace(filename, ":", "")
filename = Replace(filename, "*", "")
filename = Replace(filename, "?", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, ".", "")
filename = Replace(filename, ",", "")
filename = Replace(filename, ";", "")
filename = Replace(filename, "@", "")
filename = Replace(filename, "!", "")
filename = Replace(filename, "$", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, "_", "")
filename = Replace(filename, "(", "")
filename = Replace(filename, ")", "")
filename = Replace(filename, ":", "")
filename = Replace(filename, "*", "")
filename = Replace(filename, "?", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, ".", "")
filename = Replace(filename, ",", "")
filename = Replace(filename, ";", "")
filename = Replace(filename, "@", "")
filename = Replace(filename, "!", "")
filename = Replace(filename, "$", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, "_", "")
filename = Replace(filename, "(", "")
filename = Replace(filename, ")", "")
filename = Replace(filename, ":", "")
filename = Replace(filename, "*", "")
filename = Replace(filename, "?", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, ".", "")
filename = Replace(filename, ",", "")
filename = Replace(filename, ";", "")
filename = Replace(filename, "@", "")
filename = Replace(filename, "!", "")
filename = Replace(filename, "$", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, "_", "")
filename = Replace(filename, "(", "")
filename = Replace(filename, ")", "")
filename = Replace(filename, ":", "")
filename = Replace(filename, "*", "")
filename = Replace(filename, "?", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, ".", "")
filename = Replace(filename, ",", "")
filename = Replace(filename, ";", "")
filename = Replace(filename, "@", "")
filename = Replace(filename, "!", "")
filename = Replace(filename, "$", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, "_", "")
filename = Replace(filename, "(", "")
filename = Replace(filename, ")", "")
filename = Replace(filename, ":", "")
filename = Replace(filename, "*", "")
filename = Replace(filename, "?", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, ".", "")
filename = Replace(filename, ",", "")
filename = Replace(filename, ";", "")
filename = Replace(filename, "@", "")
filename = Replace(filename, "!", "")
filename = Replace(filename, "$", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, "_", "")
filename = Replace(filename, "(", "")
filename = Replace(filename, ")", "")
filename = Replace(filename, ":", "")
filename = Replace(filename, "*", "")
filename = Replace(filename, "?", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, ".", "")
filename = Replace(filename, ",", "")
filename = Replace(filename, ";", "")
filename = Replace(filename, "@", "")
filename = Replace(filename, "!", "")
filename = Replace(filename, "$", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, "_", "")
filename = Replace(filename, "(", "")
filename = Replace(filename, ")", "")
filename = Replace(filename, ":", "")
filename = Replace(filename, "*", "")
filename = Replace(filename, "?", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, ".", "")
filename = Replace(filename, ",", "")
filename = Replace(filename, ";", "")
filename = Replace(filename, "@", "")
filename = Replace(filename, "!", "")
filename = Replace(filename, "$", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, "_", "")
filename = Replace(filename, "(", "")
filename = Replace(filename, ")", "")
filename = Replace(filename, ":", "")
filename = Replace(filename, "*", "")
filename = Replace(filename, "?", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, ".", "")
filename = Replace(filename, ",", "")
filename = Replace(filename, ";", "")
filename = Replace(filename, "@", "")
filename = Replace(filename, "!", "")
filename = Replace(filename, "$", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, "_", "")
filename = Replace(filename, "(", "")
filename = Replace(filename, ")", "")
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filename = Replace(filename, "*", "")
filename = Replace(filename, "?", "")
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filename = Replace(filename, "!", "")
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filename = Replace(filename, "\" & Chr(34), "")
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filename = Replace(filename, "(", "")
filename = Replace(filename, ")", "")
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filename = Replace(filename, "*", "")
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filename = Replace(filename, "\" & Chr(34), "")
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filename = Replace(filename, ",", "")
filename = Replace(filename, ";", "")
filename = Replace(filename, "@", "")
filename = Replace(filename, "!", "")
filename = Replace(filename, "$", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, "_", "")
filename = Replace(filename, "(", "")
filename = Replace(filename, ")", "")
filename = Replace(filename, ":", "")
filename = Replace(filename, "*", "")
filename = Replace(filename, "?", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, ".", "")
filename = Replace(filename, ",", "")
filename = Replace(filename, ";", "")
filename = Replace(filename, "@", "")
filename = Replace(filename, "!", "")
filename = Replace(filename, "$", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, "_", "")
filename = Replace(filename, "(", "")
filename = Replace(filename, ")", "")
filename = Replace(filename, ":", "")
filename = Replace(filename, "*", "")
filename = Replace(filename, "?", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, ".", "")
filename = Replace(filename, ",", "")
filename = Replace(filename, ";", "")
filename = Replace(filename, "@", "")
filename = Replace(filename, "!", "")
filename = Replace(filename, "$", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, "_", "")
filename = Replace(filename, "(", "")
filename = Replace(filename, ")", "")
filename = Replace(filename, ":", "")
filename = Replace(filename, "*", "")
filename = Replace(filename, "?", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, ".", "")
filename = Replace(filename, ",", "")
filename = Replace(filename, ";", "")
filename = Replace(filename, "@", "")
filename = Replace(filename, "!", "")
filename = Replace(filename, "$", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, "_", "")
filename = Replace(filename, "(", "")
filename = Replace(filename, ")", "")
filename = Replace(filename, ":", "")
filename = Replace(filename, "*", "")
filename = Replace(filename, "?", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, ".", "")
filename = Replace(filename, ",", "")
filename = Replace(filename, ";", "")
filename = Replace(filename, "@", "")
filename = Replace(filename, "!", "")
filename = Replace(filename, "$", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, "_", "")
filename = Replace(filename, "(", "")
filename = Replace(filename, ")", "")
filename = Replace(filename, ":", "")
filename = Replace(filename, "*", "")
filename = Replace(filename, "?", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, ".", "")
filename = Replace(filename, ",", "")
filename = Replace(filename, ";", "")
filename = Replace(filename, "@", "")
filename = Replace(filename, "!", "")
filename = Replace(filename, "$", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, "_", "")
filename = Replace(filename, "(", "")
filename = Replace(filename, ")", "")
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filename = Replace(filename, "*", "")
filename = Replace(filename, "?", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
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filename = Replace(filename, ",", "")
filename = Replace(filename, ";", "")
filename = Replace(filename, "@", "")
filename = Replace(filename, "!", "")
filename = Replace(filename, "$", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, "_", "")
filename = Replace(filename, "(", "")
filename = Replace(filename, ")", "")
filename = Replace(filename, ":", "")
filename = Replace(filename, "*", "")
filename = Replace(filename, "?", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
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filename = Replace(filename, ";", "")
filename = Replace(filename, "@", "")
filename = Replace(filename, "!", "")
filename = Replace(filename, "$", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
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filename = Replace(filename, "(", "")
filename = Replace(filename, ")", "")
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filename = Replace(filename, "*", "")
filename = Replace(filename, "?", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, ".", "")
filename = Replace(filename, ",", "")
filename = Replace(filename, ";", "")
filename = Replace(filename, "@", "")
filename = Replace(filename, "!", "")
filename = Replace(filename, "$", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, "_", "")
filename = Replace(filename, "(", "")
filename = Replace(filename, ")", "")
filename = Replace(filename, ":", "")
filename = Replace(filename, "*", "")
filename = Replace(filename, "?", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, ".", "")
filename = Replace(filename, ",", "")
filename = Replace(filename, ";", "")
filename = Replace(filename, "@", "")
filename = Replace(filename, "!", "")
filename = Replace(filename, "$", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, "_", "")
filename = Replace(filename, "(", "")
filename = Replace(filename, ")", "")
filename = Replace(filename, ":", "")
filename = Replace(filename, "*", "")
filename = Replace(filename, "?", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, ".", "")
filename = Replace(filename, ",", "")
filename = Replace(filename, ";", "")
filename = Replace(filename, "@", "")
filename = Replace(filename, "!", "")
filename = Replace(filename, "$", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, "_", "")
filename = Replace(filename, "(", "")
filename = Replace(filename, ")", "")
filename = Replace(filename, ":", "")
filename = Replace(filename, "*", "")
filename = Replace(filename, "?", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, ".", "")
filename = Replace(filename, ",", "")
filename = Replace(filename, ";", "")
filename = Replace(filename, "@", "")
filename = Replace(filename, "!", "")
filename = Replace(filename, "$", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, "_", "")
filename = Replace(filename, "(", "")
filename = Replace(filename, ")", "")
filename = Replace(filename, ":", "")
filename = Replace(filename, "*", "")
filename = Replace(filename, "?", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, ".", "")
filename = Replace(filename, ",", "")
filename = Replace(filename, ";", "")
filename = Replace(filename, "@", "")
filename = Replace(filename, "!", "")
filename = Replace(filename, "$", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, "_", "")
filename = Replace(filename, "(", "")
filename = Replace(filename, ")", "")
filename = Replace(filename, ":", "")
filename = Replace(filename, "*", "")
filename = Replace(filename, "?", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, ".", "")
filename = Replace(filename, ",", "")
filename = Replace(filename, ";", "")
filename = Replace(filename, "@", "")
filename = Replace(filename, "!", "")
filename = Replace(filename, "$", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
filename = Replace(filename, "_", "")
filename = Replace(filename, "(", "")
filename = Replace(filename, ")", "")
filename = Replace(filename, ":", "")
filename = Replace(filename, "*", "")
filename = Replace(filename, "?", "")
filename = Replace(filename, "'", "")
filename = Replace(filename, "\" & Chr(34), "")
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filename = Replace(filename, ",", "")
filename = Replace(filename, ";", "")
filename = Replace(filename, "@", "")
filename =