需要帮助将curl调用转换为VB.NET

Imports System.Net

Public Class CurlConverter
    Public Shared Function ConvertCurlToVB(curlCommand As String) As String
        Dim result As String = ""

        ' 解析curl命令
        Dim url As String = ""
        Dim method As String = "GET"
        Dim headers As New Dictionary(Of String, String)
        Dim data As String = ""

        ' 提取URL
        Dim urlStartIndex As Integer = curlCommand.IndexOf("curl ") + 5
        Dim urlEndIndex As Integer = curlCommand.IndexOf(" ", urlStartIndex)
        url = curlCommand.Substring(urlStartIndex, urlEndIndex - urlStartIndex)

        ' 提取方法
        Dim methodIndex As Integer = curlCommand.IndexOf("-X ")
        If methodIndex > -1 Then
            Dim methodStartIndex As Integer = methodIndex + 3
            Dim methodEndIndex As Integer = curlCommand.IndexOf(" ", methodStartIndex)
            method = curlCommand.Substring(methodStartIndex, methodEndIndex - methodStartIndex)
        End If

        ' 提取头部信息
        Dim headerIndex As Integer = curlCommand.IndexOf("-H ")
        While headerIndex > -1
            Dim headerStartIndex As Integer = headerIndex + 4
            Dim headerEndIndex As Integer = curlCommand.IndexOf(" ", headerStartIndex)
            Dim header As String = curlCommand.Substring(headerStartIndex, headerEndIndex - headerStartIndex)

            Dim headerParts As String() = header.Split(":")
            Dim headerKey As String = headerParts(0).Trim()
            Dim headerValue As String = headerParts(1).Trim()

            headers.Add(headerKey, headerValue)

            headerIndex = curlCommand.IndexOf("-H ", headerEndIndex)
        End While

        ' 提取数据
        Dim dataIndex As Integer = curlCommand.IndexOf("--data ")
        If dataIndex > -1 Then
            Dim dataStartIndex As Integer = dataIndex + 7
            Dim dataEndIndex As Integer = curlCommand.IndexOf(" ", dataStartIndex)
            data = curlCommand.Substring(dataStartIndex, dataEndIndex - dataStartIndex)
        End If

        ' 创建WebClient对象
        Using client As New WebClient()
            ' 设置请求方法
            Select Case method.ToUpper()
                Case "GET"
                    client.Method = "GET"
                Case "POST"
                    client.Method = "POST"
                Case "PUT"
                    client.Method = "PUT"
                Case "DELETE"
                    client.Method = "DELETE"
                Case Else
                    ' 默认使用GET方法
                    client.Method = "GET"
            End Select

            ' 设置请求头部
            For Each header In headers
                client.Headers.Add(header.Key, header.Value)
            Next

            ' 发送请求并获取响应
            If client.Method = "POST" OrElse client.Method = "PUT" Then
                result = client.UploadString(url, data)
            Else
                result = client.DownloadString(url)
            End If
        End Using

        Return result
    End Function
End Class

Dim curlCommand As String = "curl -X POST -H 'Content-Type: application/json' -d '{""name"": ""John"", ""age"": 30}' https://api.example.com/users"
Dim response As String = CurlConverter.ConvertCurlToVB(curlCommand)
Console.WriteLine(response)