fwrite 、 fputs 字节安全

Question

我想通过 POST 将数据发送到 php 页面，我需要完全按原样存储字节，但我无法做到这一点。当我发送 138 字节时，fputs 和 fwrite 返回 133。VB.NET

$fh = fopen($myFile, 'ab') or die("can't open file");
echo fputs($fh, $_POST['data'] ,strlen($_POST['data']));
fclosw

:

Dim ar As System.Text.UTF8Encoding = New System.Text.UTF8Encoding
Request.ContentLength = ar.GetByteCount(PostData)
ContentType = "application/x-www-form-urlencoded"
SW = New StreamWriter(Request.GetRequestStream(), ar)
SW.Write(PostData)

-edit 这是加密数据函数

Public Function Encrypt(ByVal stringToEncrypt As String, ByVal key As String) As String
    Rijndael.Key = SHA256.ComputeHash(ASCIIEncoding.ASCII.GetBytes(key))
    Rijndael.Mode = CipherMode.ECB
    Dim Buffer As Byte() = ASCIIEncoding.UTF8.GetBytes(stringToEncrypt)
    Return Convert.ToBase64String(Rijndael.CreateEncryptor().TransformFinalBlock(Buffer, 0,  Buffer.Length))
    End Function

编辑 例如，原始加密字符串：

j/aokbSUDP1nAD7KafnDoLSmI93sOLiroTwcQIUS/Xw8eUlUZA58OULXCtsnkKqOe+UXlFP6vKuTIWxVMRBZLiBiIOZomNsvoIfM4dv2UzAk2q5mpjo4/0E9lPvu4I7X

发送后

j/aokbSUDP1nAD7KafnDoLSmI93sOLiroTwcQIUS/Xw8eUlUZA58OULXCtsnkKqOe UXlFP6vKuTIWxVMRBZLiBiIOZomNsvoIfM4dv2UzAk2q5mpjo4/0E9lPvu4I7X

Answer 1

我看不出这行不通的原因：

$connection = fopen($file, 'ab');
fwrite($connection, urldecode($_POST['data']));
fclose($connection);