我一直在尝试Google的一些事情,将数据发布到网络服务器,但它们都不起作用:我仍然坚持如何将变量转换为请求,考虑到第二个变量是一个SQL查询所以它有空格。
有人知道使用WebClient POST数据的正确方法吗?我宁愿使用WebClient,因为它需要的代码少于HttpWebRequest / HttpWebResponse。
这是我到目前为止所尝试的内容:
Private Sub Button1_Click(ByVal sender As System.Object,ByVal e As System.EventArgs)Handles Button1.Click Dim wc = New WebClient()
''#convert data
wc.Headers.Add("Content-Type", "application/x-www-form-urlencoded")
Dim postData = String.Format("db={0}&query={1}", _
HttpUtility.UrlEncode("books.sqlite"), _
HttpUtility.UrlEncode("SELECT id,title FROM boooks"))
''#Dim bytArguments As Byte() = Encoding.ASCII.GetBytes("db=books.sqlite|query=SELECT * FROM books")
''#POST query
Dim bytRetData As Byte() = wc.UploadData("http://localhost:9999/get", "POST", postData)
RichTextBox1.Text = Encoding.ASCII.GetString(bytRetData)
Exit Sub
Dim client = New WebClient()
Dim nv As New Collection
nv.Add("db", "books.sqlite")
nv.Add("query", "SELECT id,title FROM books")
Dim address As New Uri("http://localhost:9999/get")
''#Dim bytRetData As Byte() = client.UploadValues(address, "POST", nv)
RichTextBox1.Text = Encoding.ASCII.GetString(bytRetData)
Exit Sub
''#Dim wc As New WebClient()
''#convert data
wc.Headers.Add("Content-Type", "application/x-www-form-urlencoded")
Dim bytArguments As Byte() = Encoding.ASCII.GetBytes("db=books.sqlite|query=SELECT * FROM books")
''#POST query
''#Dim bytRetData As Byte() = wc.UploadData("http://localhost:9999/get", "POST", bytArguments)
RichTextBox1.Text = Encoding.ASCII.GetString(bytRetData)
Exit Sub
End Sub
谢谢。
编辑:感谢大家的反馈。
对于那些有同样问题的人,这里有一些工作代码:
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim baseURL As String = "localhost:9999"
Dim strURL As String = "http://" & baseURL & "/get"
Dim client As New WebClient()
client.Headers.Add("Content-Type", "application/x-www-form-urlencoded")
client.Headers.Add("Accept-Encoding", "text/plain")
client.Headers.Add("User-Agent", "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US) AppleWebKit/532.9 (KHTML, like Gecko) Iron/4.0.280.0 Chrome/4.0.280.0 Safari/532.9")
'BAD client.Headers.Add("Host", baseURL)
'BAD client.Headers.Add("Host", "localhost")
'Convert in parameters in case contain spaces, accents, etc.
Dim postData As String = String.Format("db={0}&query={1}", _
HttpUtility.UrlEncode("books.sqlite"), _
HttpUtility.UrlEncode("SELECT id,title FROM books"))
RichTextBox1.Text = client.UploadString(New Uri(strURL), "POST", postData)
End Sub
答案 0 :(得分:3)
由于您使用“localhost”作为Web客户端的目标,我将假设您也控制此站点。通过该站点的查询字符串接受SQL是一个非常糟糕的主意。
然后,您的问题的答案是重新编写您的网站,以便它只希望参数插入查询而不是查询本身。
您的代码存在其他一些问题: