Question

我们有一个基本的打印客户端，它使用Ajax侦听从Web发送的连接。发送了几个可变数据，例如Jquery请求上下文：

$.ajax({
            url : 'http://127.0.0.1:13000',
            type : 'POST',
            data :  {
          'shipmentNumber': 'SAMPLESN998SSkLAIS',
          'labelType': 'labelTypePostageEND',
          'pdfLabel': 'pdfLabel__'
        }

这被视为

POST / HTTP / 1.1主机：127.0.0.1:13000连接：keep-alive 内容长度：70621接受： / 来源：null User-Agent：Mozilla / 5.0 （Windows NT 10.0; Win64; x64）AppleWebKit / 537.36（KHTML，与Gecko一样） Chrome / 59.0.3071.109 Safari / 537.36内容类型：应用程序/ x-WWW窗体-urlencoded; charset = UTF-8 Accept-Encoding： gzip，deflate，br Accept-Language：en-GB，en-US; q = 0.8，en; q = 0.6 shipmentNumber = SAMPLESN998SSkLAIS＆安培; labelType = labelTypeRoyalMailEND＆安培; pdfLabel =

我需要最终得到＆＃34; labelType＆＃34;，＆＃34; shipmentNumber＆＃34;更多（注意，labelType / END是我搜索的字符串，如下所示，不是我想要的数据的一部分），作为要使用的变量，我不确定最好的方法。目前我有（简化）：

        Dim port As Int32 = 13000
        Dim localAddr As IPAddress = IPAddress.Parse("127.0.0.1")

        server = New TcpListener(localAddr, port)

        ' Start listening for client requests.
        server.Start()

        ' Buffer for reading data
        Dim bytes(10240000) As Byte
        Dim data As String = Nothing

        ' Enter the listening loop.
        While True

            Dim client As TcpClient = server.AcceptTcpClient()

            data = Nothing

            ' Get a stream object for reading and writing
            Dim stream As NetworkStream = client.GetStream()

            Dim i As Int32

            ' Loop to receive all the data sent by the client.
            i = stream.Read(bytes, 0, bytes.Length)
            data = System.Text.Encoding.ASCII.GetString(bytes, 0, 5000)

            ' >>>> The bit that matters, split the data based on what we know will be there
            Dim searchIndex As Integer = data.IndexOf("labelType")
            Dim f As String = data.Substring(searchIndex + 1, data.IndexOf("END", searchIndex + 1) - searchIndex - 1)

            MessageBox.Show(data)

            ' >>> Response and Close connection removed to keep question clean
        End While

我可以看到我搜索＆＃34;标记＆＃34;的响应。我放在那里的分隔符;感觉它会不可靠，应该有更好的方法。我有seen some questions相关但他们没有directly address this，我不确定这些是否正确。这可能已经是最好的方式，但不要求我不知道。

你会用什么方法来做这件事？

有更好的方法吗？

Answer 1

使用shipmentNumber=作为关键字查找参数的开头。然后使用&分隔符将其拆分。然后循环使用=分隔符将它们分成参数/值。

data = System.Text.Encoding.ASCII.GetString(bytes, 0, 5000)

Dim dataStart As String = "shipmentNumber="

If data.Contains(dataStart) Then
    data = data.Substring(data.IndexOf(dataStart)).Trim
    Dim _params() As String = Split(data, "&")
    For Each p In _params
        Dim _values() As String = Split(p, "=")
        If _values.Length > 0 Then
            Dim _parameter As String = _values(0)
            Dim _value As String = ""
            If _values.Length > 1 Then
                _value = _values(1)
            End If
            Debug.Print("parameter = " & _parameter)
            Debug.Print("value = " & _value)
        End If
    Next
End If

TcpListener处理POST响应变量

1 个答案: