Upload. controllo se il file è un'immagine

**benete** · 11-07-2007, 21:40

buongiorno ,

vorrei sapere come si fa a fare un controllo x verificare che il file che stai uploadando sia un file immagine, e se non è un immagine bisogna far restituire un errore..

grazieeeeee

**fraude** · 12-07-2007, 08:24

Dipende dallo script di upload che utilizzi.

**benete** · 12-07-2007, 09:06

questo è il mio script x upload :

<%
'Sample file Field-SaveAs.asp
'Store extra upload info to a database
' and file contents to the disk
Server.ScriptTimeout = 5000

'Create upload form
'Using Huge-ASP file upload
'Dim Form: Set Form = Server.CreateObject("ScriptUtils.ASPForm")
'Using Pure-ASP file upload
Dim Form: Set Form = New ASPForm %><%

Server.ScriptTimeout = 1000
Form.SizeLimit = &HA00000'10MB

'was the Form successfully received?
Const fsCompletted = 0

If Form.State = fsCompletted Then 'Completted

'Create destination path+filename for the source file.
Dim DestinationPath, DestinationFileName
DestinationPath = Server.mapPath("public\images")
DestinationFileName = DestinationPath & "\" & str_users_code & "\" & Form("SourceFile").FileName

'Open recordset to store uploaded data
Dim RS: Set RS = OpenUploadRS

'Store extra info about upload to database
RS.AddNew
RS("UploadDT") = Now()
RS("Description") = Form.Texts.Item("Description")
RS("SourceFileName") = Form("SourceFile").FilePath
RS("DestFileName") = DestinationFileName
RS("DataSize") = Form("SourceFile").Length

RS("name") = str_users_name
RS("code") = str_users_code
'...
RS.Update

Response.write "
Source file names:"
Dim Field: For Each Field in Form.Files.Items
Response.write "
" & Field.FileName
Next
'{b}Save file to the destination
Form("SourceFile").SaveAs DestinationFileName
'{/b}

'response.write "<Font color=green>
SourceFile was saved as " & DestinationFileName )
'response.write "
See ListFiles table in " & Server.MapPath("mdb-database\utenti.mdb") & " database.</Font>"
Response.Redirect("fotoprofilo.asp")

ElseIf Form.State > 10 then
Const fsSizeLimit = &HD
Select case Form.State
case fsSizeLimit: response.write "
<Font Color=red>Source form size (" & Form.TotalBytes & "B) exceeds form limit (" & Form.SizeLimit & "B)</Font>
"
case else response.write "
<Font Color=red>Some form error.</Font>
"
end Select
End If'Form.State = 0 then

Function OpenUploadRS()
Dim RS : Set RS = CreateObject("ADODB.Recordset")

'Open dynamic recordset, table Upload
RS.Open "ListFiles", GetConnection, 2, 2

Set OpenUploadRS = RS
end Function

Function GetConnection()
dim Conn: Set Conn = CreateObject("ADODB.Connection")
Conn.Provider = "Microsoft.Jet.OLEDB.4.0"
Conn.open "Data Source=" & Server.MapPath("mdb-database\utenti.mdb")
set GetConnection = Conn
end function

%>

<head>
<title><%=pageTitle%> .::. <%=str_users_name%> .::.</title>
<LINK href="css/file.css" type=text/css rel=stylesheet>

<meta name="title" content="Mega Community">
<meta name="description" content="Benvenuto nella Community dei ragazzi. Avrai la possibilità di inserire foto e blog personali. Entra per conoscere gente nuova ! megacommunity.it">
<meta name="keywords" content="megacommunity megacommunity.it chat forum foto album classifiche community ragazzi ragazze cazzate blog discussioni ">
<meta name="author" content="Walter Benetello">
<meta name="copyright" content="Walter Benetello Copyright @ 2007">
<meta http-equiv="Reply-to" content="walter.benetello@gmail.com">
<meta http-equiv="content-language" content="IT">
<meta http-equiv="Content-Type" content="text/html; iso-8859-1">
<meta name="ROBOTS" content="INDEX,FOLLOW">

<script language="JavaScript" type="text/JavaScript">

</script>
<script type="text/javascript" language="JavaScript" src="http://www.megacommunity.it/myasg/stats_js.asp"></script>
</head>

<body background="back_all.jpg" leftmargin="0" topmargin="0" marginwidth="0" marginheight="0" lang="it" onLoad="MM_preloadImages('bottoni/iscritti2.gif','bottoni/classifiche2.png','bottoni/album2.gif','bottoni/blog2.gif','bottoni/links2.gif','bottoni/newsletters2.gif','bottoni/cazzate2.gif','bottoni/muretto2.gif','bottoni/discussioni2.gif','bottoni/home2.gif')">
<div align="center">
<table width="998" background="sfondo2.gif" border="0">

<tr>
<td colspan="3" rowspan="2" valign="top"></td>
<td width="25" height="118" valign="top"></td>
<td colspan="2" valign="top">[img]bottoni/home.gif[/img]</td>
<td width="61" valign="top"></td>
<td colspan="2" valign="top">[img]bottoni/iscritti.gif[/img]</td>
<td colspan="2" valign="top"></td>
<td colspan="3" valign="top">[img]bottoni/classifiche.png[/img]</td>
<td colspan="3" valign="top"></td>
<td width="1"></td>
</tr>
<tr>
<td colspan="12" rowspan="2" valign="top" align="center" bordercolor="#FFFFFF" style="border-style: dotted; border-width: 1px">[img]bottoni/profilo.gif[/img]<font size="+3"><sup><%=str_users_name%></sup></font></td>

<td colspan="2" rowspan="3" valign="top"></td>
<td height="30"></td>
</tr>
<tr>
<td colspan="3" rowspan="3" valign="top">[img]bottoni/album.gif[/img]</td>
<td height="16"></td>
</tr>
<tr>
<td colspan="12" rowspan="6" valign="top">
<div style="position: relative; width: 100%; height: 80%; z-index: 1; " id="livello2">
<table width="100%" border="1">
<form method=post ENCTYPE="multipart/form-data">

<tr>
<td width="347" height="23" valign="top">Scegli la foto da inserire

(solo formato .JPG e .GIF e non piu di 300Kb di peso) </td>
<td width="150" valign="top"><input type="file" name="SourceFile" size="40"></td>
</tr>
<tr>
<td height="42" valign="top">Descrizione Foto :</td>
<td valign="top">
<textarea cols="60" rows="5" name="Description"></textarea>
</td>
</tr>
<tr>
<td height="23" valign="top"></td>
<td valign="top" align="right"><input type="submit" Name="Action" value="Upload the file >>"></td>
</tr>
</form>
</table>
</div>
</td>
<td height="26"></td>
</tr>
<tr>
<td colspan="2" rowspan="2" valign="top">[img]bottoni/muretto.gif[/img]</td>
<td height="55"></td>
</tr>
<tr>
<td colspan="3" rowspan="2" valign="top"></td>
<td height="33"></td>
</tr>
<tr>
<td colspan="2" rowspan="2" valign="top"></td>
<td height="25"></td>
</tr>
<tr>
<td colspan="2" rowspan="2" valign="top">[img]bottoni/blog.gif[/img]</td>
<td width="2" rowspan="2" valign="top"></td>
<td height="51"></td>
</tr>
<tr>
<td colspan="2" rowspan="2" valign="top">[img]bottoni/cazzate.gif[/img]</td>
<td height="42"></td>
</tr>
<tr>
<td colspan="3" rowspan="2" valign="top"></td>
<td colspan="5" rowspan="2" valign="top">[img]bottoni\logout2.gif[/img][img]bottoni\torna.gif[/img]</td>
<td colspan="7" rowspan="2" align="right" valign="top"></td>
<td height="46"></td>
</tr>
<tr>
<td colspan="2" rowspan="2" valign="top"></td>
<td height="36"></td>
</tr>
<tr>
<td width="1" rowspan="2" valign="top"></td>
<td colspan="4" rowspan="3" valign="top">[img]bottoni/discussioni.gif[/img]</td>
<td width="149" rowspan="3" valign="top"></td>
<td colspan="2" rowspan="3" valign="top">[img]bottoni/newsletters.gif[/img]</td>
<td colspan="2" rowspan="3" valign="top"></td>
<td colspan="2" rowspan="3" valign="top">[img]bottoni/links.gif[/img]</td>
<td height="36" colspan="3" valign="top"></td>
<td></td>
</tr>
<tr>
<td width="174" rowspan="2" valign="top"></td>
<td colspan="3" rowspan="2" valign="top"></td>
<td width="19" rowspan="2" valign="top"></td>
<td height="59"></td>
</tr>
<tr>
<td height="7"></td>
<td></td>
</tr>
<tr>
<td height="27" colspan="17" valign="top" align="center">
<% Server.Execute("footer.asp") %>
</td>
<td></td>
</tr>
<tr>
<td height="5"></td>
<td width="104"></td>
<td></td>
<td></td>
<td width="19"></td>
<td></td>
<td></td>
<td width="142"></td>
<td width="1"></td>
<td width="1"></td>
<td width="101"></td>
<td width="2"></td>
<td></td>
<td width="1"></td>
<td width="1"></td>
<td width="105"></td>
<td></td>
<td></td>
</tr>
</table>
</div>
</body>

**soundforgers** · 12-07-2007, 09:58

non ho dato una letta approfondota al tuo script comunque basta che controlli le 3 lettere e se sono gif, jpg, tif.... o comunque estensioni di immagini gli stampi un'errore.
in paratica:

codice:

arrname=split(File.Name,".")
if arrname(1)="gif" or if arrname(1)="jpg" ... qui metti tutte le estensioni ... then
  responselwrite "ERRORE N° : non è possibile fare l'upload di immagini"
else
  qui metti tutto l'upload
end if

**benete** · 12-07-2007, 12:06

non va .. ma al posto di file.name cosa devo mettere ?

**benete** · 12-07-2007, 13:09

ok andato.. funziona ora..

ma invece di response.write si puo mettere un allarme tipo alert ???

**soundforgers** · 12-07-2007, 14:29

si però quella è una cosa che va fatta in java... cerca alert su google io ora non mi ricordo esattamente come sia...

**benete** · 12-07-2007, 14:39

fatto fatto ! grazie...

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