//上传文件内容
s1:='file one content. Contant-Type can be application/octet-stream or if'+
'you want you can ask your OS fot the exact type.' + CRLF +
'-----------------------------7cf1d6c47c' + CRLF + //分界符,用于分隔表单(Form)中的各个域
'Content-Disposition: form-data; name="text1"' + CRLF + CRLF +
'hello2' + CRLF +
'-----------------------------7cf1d6c47c--';