http 请求服务器，其它的都正常，现在需要POST一个文件到服务器，本地文件，这个文件怎么处理，才可以装入POST，麻烦指教啊！网上找了很多代码，都不对啊，请大神赐教，谢谢。

错误代码如下：

Sub fileup()

SchemaCode = "D000867chen0527"

FilePropertyName = "photo"

BizObjectId = "b1b9ed47-151c-4447-92e9-c602cddc427b"

URL = "https://www.h3yun.com/OpenApi/UploadAttachment?SchemaCode=" & SchemaCode & "FilePropertyName=" & FilePropertyName & "BizObjectId=" & BizObjectId

cFile = "E:\image\322574.jpg"

Dim http As MSXML2.ServerXMLHTTP

Set http = New MSXML2.ServerXMLHTTP

http.Open "POST", URL, False

Dim b() As Byte, strFile As String

boundary = "----------" & RandomString()

postData = "--" & boundary & vbCrLf

postData = postData & "Content-Disposition: form-data; name=\""albumid\""" & vbCrLf

postData = postData & vbCrLf & "天aaaaa123" & vbCrLf

postData = postData & "--" & boundary & vbCrLf

postData = postData & "Content-Disposition: form-data; name=""photo[]""; filename=""" & cFile & """" & vbCrLf

postData = postData & "Content-Type: image/gif" & vbCrLf

ReDim b(FileLen(cFile))

ff = FreeFile

Open cFile For Binary As #ff

Get #ff, , b

Close #ff

strFile = b

postData = StrConv(postData & vbCrLf, vbFromUnicode) & LeftB(s, UBound(b)) & ChrB(13) & ChrB(10)

postData = postData & StrConv("--" & boundary & "--" & vbCrLf, vbFromUnicode)

http.setRequestHeader "Content-Type", "multipart/form-data; boundary=" & boundary

ReDim b(LenB(postData))

b = postData

HexStr = ""         '这一段是我显示提交的数据

For i = 0 To UBound(b)

Debug.Print IIf(b(i) < 16, "0", "") & Hex(b(i)); " ";

HexStr = HexStr & IIf(b(i) < 32 Or b(i) > 127, ".", Chr(b(i)))

If i Mod 16 = 15 Then Debug.Print "  " & HexStr: HexStr = ""

Next

http.setRequestHeader "Content-Length", UBound(b)

http.send b

http.waitForResponse

Debug.Print http.getAllResponseHeaders

Debug.Print StrConv(http.responseBody, vbUnicode)

End Sub