Set xml = Server.CreateObject("Microsoft.XMLHTTP")
xml.Open "GET", "http://www.indexguy.com/request_server.cfm?member_id=15893&id="+request.querystring("id")+"&"+request.querystring, False
xml.Send
How can I build the querystring parameter to a string object in C#/VB.NET
"member_id=15893&id="+request.querystring("id")+"&"+request.querystring"
If you are looking to build a querystring, String.Format("{0}", arg) might be a cleaner method to construct it.
For ASP.NET, you're going to want to replace the Server.CreateObject("Microsoft.XMLHTTP") with HttpWebRequest.
As for building the query string, that's still identical. You can still retrieve query string parameters by indexing into Request.QueryString. If you're using C# you can keep the + for string concatenation but might be more acceptable to use & in VB.
In ASP.NET the Page class exposes a Request property which provides access to a QueryString property - this is a NameValueCollection that lets you get values out in much the same way as in your existing example, by specifying keys:
var id = Page.Request.QueryString("id");
var newQuery = string.Format("?member_id=15893&id={0}&", id);
The above can easily be expanded to build more into your required query string.
As for the request you're initiating, that can be achieved using a WebRequest instance; to alter the sample from MSDN only slightly, here is an example:
WebRequest request = WebRequest.Create(yourUrl + newQuery);
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Response.Write(response.StatusDescription);
Stream dataStream = response.GetResponseStream();
StreamReader reader = new StreamReader (dataStream);
string responseFromServer = reader.ReadToEnd();
Response.Write(responseFromServer);
reader.Close();
dataStream.Close();
response.Close();
Related
I subscribe to a mass email service which, when an error occurs at their end, posts to a page on my website as an endpoint to notify me that an email has bounced.
They describe it as follows:
The event data is sent in the POST request body using a JSON object.
What I need to know is how can I capture the info posted to me?
Currently I'm pointing them to a generic handler, a .ashx page, this can be changed to whatever as long as it's in .NET.
In 10 years working with first classic ASP and now .NET I've never done this before and I must admit I don't even know where to start.
This is the code I used to achieve a similar thing - not sure where I got it originally.
C#
var strJSON = String.Empty;
context.Request.InputStream.Position = 0;
using (var inputStream = new StreamReader(context.Request.InputStream))
{
strJSON = inputStream.ReadToEnd();
}
JavaScriptSerializer javaScriptSerializer = new JavaScriptSerializer();
object serJsonDetails = javaScriptSerializer.Deserialize(strJSON, typeof(object));
// go and process the serJsonDetails object
or VB
Dim strJSON = [String].Empty
context.Request.InputStream.Position = 0
Using inputStream = New StreamReader(context.Request.InputStream)
strJSON = inputStream.ReadToEnd()
End Using
Dim javaScriptSerializer As New JavaScriptSerializer()
Dim serJsonDetails As Object = javaScriptSerializer.Deserialize(strJSON, GetType(Object))
' go and process the serJsonDetails object
You could just read the Request stream (Request.GetRequestStream) and use Json.NET to deserialize to an object.
You could use MVC4 and the built in object mapping.
There's many options. Perhaps you should read up on them more so that you have an idea of their capabilities and drawbacks.
Probably Request.Form (here) will help you get the JSON, if you know the content of the post, and then you need something like json.net library to get the object, or you can simply search the string using regex or keywords
Or if you can direct the post to a web service(asmx) instead of a web page, those services will parse the json for you
If you need to read raw post data twice or many times, i advice you to use this code.
string postBodyJson = null;
MemoryStream ms = new MemoryStream();
Request.InputStream.Position = 0;
Request.InputStream.Seek(0, SeekOrigin.Begin);
Request.InputStream.CopyTo(ms);
ms.Position = 0;
ms.Seek(0, SeekOrigin.Begin);
using (var reader = new StreamReader(ms))
{
postBodyJson = reader.ReadToEnd();
}
I generated a proxy class given a URL to a WSDL.
I need to let the end-user change the service's URL to his specific URL, like this:
ServiceProxy.Url = [URL set by end-user];
The issue is that this URL should not point to the WSDL, it should be the binding address which is found within the WSDL (wsdl:service -> wsdl:port -> wsdl:address) (this is a SAP web service, I understand that is why I must use the binding address).
I am thinking of using the XDocument class to get that value, but I am wondering if there is any "built-in" functionality in WCF or web services to get the binding address. Thank you.
I did a small function in VB.NET (sorry!) based on code at Parse Complex WSDL Parameter Information . Hope it helps.
Public Function GetURLFromWSDL(ByVal wsdl As String) As String
Dim request As HttpWebRequest = WebRequest.Create(wsdl)
request.ContentType = "text/xml;charset=""utf-8"""
request.Method = "GET"
request.Accept = "text/xml"
Using response As WebResponse = request.GetResponse()
Using stream As Stream = response.GetResponseStream()
Dim service As ServiceDescription = ServiceDescription.Read(stream)
Dim binding As SoapAddressBinding = service.Services(0).Ports(0).Extensions(0)
Return binding.Location
End Using
End Using
End Function
I have developed a client page for wcf service. basically my page has one button and two textboxes one is for loading request xml from xml file, and another one is displaying response xml.
Problem is that after any error got from wcf service my request xml textbox ignores all xml nodes it just displays node values with even spaces.
this is working in one machine it is not working in another machine.
two machines are windows xp os, ie 7.
<TextBox ID="requesttextbox" runat="server" TextMode="MultiLine" Width="470px"
Height="300px" Wrap="false/>
button click code something like this
System.Xml.XmlDocument xmlDoc = new System.Xml.XmlDocument();
xmlDoc.XmlResolver = null;
xmlDoc.LoadXml(requesttextbox.Text);
HttpWebRequest objHttpWebRequest = null;
HttpWebResponse objHttpWebResponse = null;
string strFinalRequestXML = xmlDoc.OuterXml;
objHttpWebRequest = (HttpWebRequest)WebRequest.Create("RequestURL");
objHttpWebRequest.Method = "POST";
objHttpWebRequest.Accept = "xml";
objHttpWebRequest.ContentType = "application/xml; charset=utf-8";
objHttpWebRequest.Timeout = 300000;
objHttpWebRequest.ContentLength = strFinalRequestXML.Length;
System.IO.StreamWriter sw = new System.IO.StreamWriter (objHttpWebRequest.GetRequestStream());
sw.Write(strFinalRequestXML);
sw.Close();
try
{
objHttpWebResponse = (HttpWebResponse)objHttpWebRequest.GetResponse();
Stream streamResponseText = objHttpWebResponse.GetResponseStream();
StreamReader srFinalResponseText = new StreamReader(streamResponseText, Encoding.UTF8);
txtResponse.Text = string.Empty;
// formattin xml string to as xml nodes to display in textbox
System.Xml.Linq.XElement element = System.Xml.Linq.XElement.Parse(srFinalResponseText.ReadToEnd());
txtResponse.Text = element.ToString();
strStatusCode = objHttpWebResponse.StatusCode.GetHashCode().ToString();
}
catch (WebException objWebException)
{
}
For example:
request xml <node>test</node> <node1>test;</node1> inside request xml text box.
after error from wcf display as " test test".
i have no clue for this problem.
If you are truly using WCF, you shouldn't have to manually call the URL using HttpWebRequest and HttpWebResponse, nor should you have to parse the XML by hand. You should add the service to the Service References, see:
http://msdn.microsoft.com/en-us/library/bb628652.aspx
If it is not WCF, but instead a regular SOAP web service, you can still add it as a Web Reference, see:
http://msdn.microsoft.com/en-us/library/bb628649.aspx
Then you can write code that is a little easier:
using (var client = new MyService.MyServiceClient())
{
string foo;
foo = client.MyMethod();
}
As for the text display, there is nothing in your catch handler, so I'm not sure where the textbox would be getting any sort of value. You must be setting it somewhere outside the code snippet you have provided.
I am trying to load a document see the code below
try
{
using (HttpWebResponse response = request.GetResponse() as HttpWebResponse)
{
XmlReader responseReader = XmlReader.Create(response.GetResponseStream());
XDocument docs = XDocument.Load(responseReader.Read());
The above line is telling me xdocument.Load has some invalid arguments.
//XDocument docs = XDocument.Load(response.GetResponseStream());
This line is not loading anything Docs is empty
XDocument docs = XDocument.Load(responseReader);
This line is not giving any overload errors but returning nothing.
List<string> books = docs.Descendants("Test")....."Remaining QQuery"
Change
XDocument docs = XDocument.Load(responseReader.Read());
to
XDocument docs = XDocument.Load(responseReader);
The method for XDocument will accept an XmlReader which is what responseReader is, however you are calling the .Read() method on which only returns a boolean which is why you are getting that error.
Firstly, you almost had it without the XmlReader; you can't load the response straight into the XDocument, but, most of the time you can do:
XDocument docs = XDocument.Load(new StreamReader(response.GetResponseStream()));
Then check docs.Nodes.Count.
If docs is still empty, it's time to look at the response itself. Look at the response.ContentType - what is it?
Assuming the response isn't too large, look at it! You can do:
StreamReader reader = new StreamReader(response.GetResponseSteam());
string text = reader.ReadToEnd();
You can dump that string anywhere. Alternatively, if it is very big, you can save the response to disk, using either a FileStream with your Response, or, more simply WebClient.DownloadFile(url, path_to_save)
Either should be good enough to get you one step closer.
I'm about to launch a site that was working well until I found the following hiccup:
I can't request a Yahoo! Pipe over SSL.
So the pages that require SSL are now missing a piece of their functionality unless I figure out a way around this; obviously, this could be done if I use an SSL-hosted page on my app to request the Yahoo! pipe for me.
I've seen solutions like http://www.iisproxy.net/license.html, but it seems to be a bit heavy for what I'm trying to do.
Can't I do this with a simple ASHX handler? Or is it more complex than that?
Thank you,
Michael
Thank you, John -- in case it's helpful to anyone else, here's the code I'm using in my ASHX file:
public override void ProcessRequest(HttpContext context)
{
var strURL = context.Server.UrlDecode(context.Request["url"]);
WebResponse objResponse = default(WebResponse);
WebRequest objRequest = default(WebRequest);
string result = null;
objRequest = HttpWebRequest.Create(strURL);
objResponse = objRequest.GetResponse();
StreamReader sr = new StreamReader(objResponse.GetResponseStream());
result = sr.ReadToEnd();
//clean up StreamReader
sr.Close();
//WRITE OUTPUT
context.Response.ContentType = "application/json";
context.Response.Write(result);
context.Response.Flush();
}
However, I was getting a couple extra characters (as opposed to the version that came direct from Yahoo! Pipes), so I had to remove those before parsing the JSON.
I guess if all you want to do is read the contents of a request you could use a WebRequest & WebResponse
here are some details on using that
http://www.west-wind.com/presentations/dotnetWebRequest/dotnetWebRequest.htm