Operating UTF-8 files in ASP

Note: The ASP here says

ASP support for UTF-8 is very poor due to some of its features.

For example, if you want to generate a file in a UTF-8 format, use a commonly used Scripting.FileSystemObject object.

The Scripting.FileSystemObject object creates a file function, which is the following:

Filesystemobject.createtextfile (Filename[,overwrite[,unicode]])

The Unicode properties are described in this way:

Options available. A Boolean value that indicates whether the file is created in Unicode or ASCII file format. True if the file is created in a Unicode file format, False if the file is created in an ASCII file format. If this section is omitted, the ASCII file is assumed to be created.

We cannot use this function to create a UTF-8 format file.

At this point, we can use the ADODB.stream object, using the method see below:

Set objStream = Server.CreateObject("ADODB.Stream")
With objStream
.Open
.Charset = "utf-8"
.Position = objStream.Size
.WriteText=str
.SaveToFile server.mappath("/sitemap.xml"),2
.Close
End With
Set objStream = Nothing

Report:

Introduction to ASCII, Unicode, UTF-8:

ASCII is a character set, including uppercase and lowercase letters, numbers, control characters, and so on, which are expressed in one byte, and the range is 0-127.

Since ASCII represents a very limited number of characters, each country or region proposes its own character set on this basis, such as GB2312, which is widely used in China, which provides the encoding for Chinese characters, expressed in two bytes.

These character sets are incompatible, and the same number may represent different characters, causing trouble with the exchange of information.

Unicode is a character set that maps all the characters in the world to a unique number (code point), such as a digital 0x0041 corresponding to the letter A. At present, Unicode is still in development, it contains more and more characters.

When storing Unicode-represented characters, you also need some encoding, such as UCS-2, which represents Unicode-encoded characters in two bytes. And UTF-8 is another encoding of the Unicode character set, it is variable length, up to 6 bytes, less than 127 characters in a byte, as the result of the ASCII character set, and thus very good compatibility, the ASCII code English text without modification can be used as UTF-8 coding is widely used in processing.