XML file upload

The MSXML parser supports more data types (see msdn: http://msdn.microsoft.com/library/psdk/xmlsdk/xmls3z1v.htm) For binary data, we can use the "bin.base64" type. OBJ_Node.NodeTypedValue - The readable write property contains data in specified nodes represented by the setting type. We can create an XML document containing multiple bin.base64 type nodes, which contains uploaded files. This feature can use a POST upload multiple files at a time. We can send an XML document to the web server using the XMLHttpRequest object and the POST method. This object provides client protocol support for HTTP servers, allowing MS XMLDOM objects to be sent and accepted on a web server. XMLHttpRequest is a COM object built into Internet Explorer 5 (do not need to be customized), and no conversion page is required after sending. Thoughts on the ADO Stream object We can create an XML document containing one or more binary nodes on the client. We must also fill the file content into the node. But unfortunately, the scripting language cannot access the local file system, and the scripting.FileSystem object (the built-in object of the Win32 system) is not available so far. This is a design restriction. So we need to find a COM object that can provide access to local binary files. ADO Stream objects (components in MDAC 2.5) provide means for reading, writing, and managing binary flow data. The content of the byte stream can be text, or binary data, and there is no limit on capacity. In ADO 2.5, Microsoft's introduction to the Stream object is not any layer of the ADO object structure, so we can use this object without bundling. This article uses the Stream object to access the file content, and then store the content into the XML node. The following sample code completes the file upload action using the Stream and MSXML objects.