How can I call a web api url from a csharp console application.
"/api/MemberApi"
I don't need anything back from the server. It just needs to be called and the Web API method will execute some code. Although it would be good to record if the call succeeded.
WebClient class is what you need.
var client = new WebClient();
var content = client.DownloadString("http://example.com");
Example of using WebClient in a console app
MSDN Documentation
You can also use HttpWebRequest if you need to deal with a low level of abstraction but WebClient is a higher-level abstraction built on top of HttpWebRequest to simplify the most common tasks.
Use the HttpWebRequest
HttpWebRequest request = WebRequest.Create("http://www.url.com/api/Memberapi") as HttpWebRequest;
//optional
HttpWebResponse response = request.GetResponse() as HttpWebResponse;
Stream stream = response.GetResponseStream();
Use the response to see if it was successfull or not. There are several Exceptions that can be raised (http://msdn.microsoft.com/en-us/library/system.net.httpwebrequest.getresponse(v=vs.110).aspx), which would show you, why your call has failed.
Related
In my C# code running .NET 6 (Azure Function) I am sending an HttpRequestMessage using HttpClient. It doesn't work but it should work, so I want to get the raw request that I am sending, including the header, so I can compare with the documentation and see the differences.
In the past I have used Fiddler but it doesn't work for me now, probably because of some security settings on my laptop. So I am looking for a solution within the world of Visual Studio 2022 or .NET 6 where I can get the raw request out for troubleshooting purposes.
This question is not really about code, but here is my code anyway.
HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Post, "https://myendpoint.com/rest/something");
var apiToken = "AOU9FrasdgasdfagtHJNV";
request.Headers.Add("Authorization", "Basic " + apiToken);
var message = new
{
sender = "Hey",
message = "Hello world",
recipients = new[] { new { id = 12345678} }
};
request.Content = new StringContent(JsonSerializer.Serialize(message), Encoding.UTF8, "application/json");
request.Headers.Add("Accept", "application/json, text/javascript");
HttpResponseMessage response = await httpClient.SendAsync(request);
When SendAsync is invoked, I wish to know what exactly is sent, both header and content.
If you cannot use any proxy solution (like Fiddler) then I can see 2 options. One is described in comments in your question to use DelegatingHandler. You can read more about this in documentation. What is interesting is that HttpClient supports logging out of the box which is described in this section https://learn.microsoft.com/en-us/aspnet/core/fundamentals/http-requests?view=aspnetcore-6.0#logging of the article which describes DelegatingHandlers
If you are worried that something will manipulate the outgoing request then you can implement option 2. This is to create temporary asp.net core application with .UseHttpLogging() middleware plugged in into pipeline as described here https://learn.microsoft.com/en-us/aspnet/core/fundamentals/http-logging/?view=aspnetcore-6.0 That way you will know exactly how your request looks like from application which is being requested point of view. Now if you will point your azure function to you temporary app - you should see what gets send
Hope it helps
I am new to Xamarin Cross-Flatform technology (C#). I am developing one small application where I need to call the http url, get the json data, parse it and display it on the screen.
I am using System.Net.Http for achieving the http call.But request is not reaching to http url
Regards,
Amit Joshi
You can use RestSharp for making http calls.
It is very easy to use.
Code sample:
using RestSharp;
var client = new RestClient ("http://rxnav.nlm.nih.gov/REST/RxTerms/rxcui/");
var request = new RestRequest (String.Format ("{0}/allinfo", "198440"));
client.ExecuteAsync (request, response => {
Console.WriteLine (response.Content);
});
RestSharp Examples
I am developing an asp.net mvc web application in which I need to call OMDB api (an api to get Imdb information of a movie). I need to send a simple GET request to the api and get the response(movie details), deserialize the response into an object and pass it to the view. Is this possible without using a reference to an external library? Can anybody give me an example on how to do it inside a controller action.
You can use the WebRequest class
using System.Net;
string url = "https://www.service.com?param=movieName";
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
Stream responseStream = response.GetResponseStream();
Reference:
http://support.microsoft.com/kb/307023
I am using a third-party handset detection library which receives the HttpRequest object as a parameter. My problem is that I need to have the code for using this library in a web-service.
I wanted to use ServiceStack since it's supposed to be much faster than other technologies.
But by using ServiceStack I haven't found any way of sending the HttpRequest from my website to the service. I have found a way to set the UserAgent like this:
var client = new JsonServiceClient(BaseUrl);
client.LocalHttpWebRequestFilter = request => request.UserAgent = Request.UserAgent;
but nothing more than that.
Is there any way to achieve this?
I have a web method in second.aspx,which has to be executed only if the incoming request is 'application/json'.So in my First.aspx page I am programmatically generating a Http request with content type set to 'application/json' using the following code.
HttpWebRequest req = (HttpWebRequest)WebRequest.Create("http://localhost/website1/Second.aspx");
req.ContentType = "application/json";
HttpWebResponse resp = (HttpWebResponse)req.GetResponse();
StreamReader sr = new StreamReader(resp.GetResponseStream());
string results = sr.ReadToEnd();
sr.Close();
and in the Second.aspx i am checking the incoming request in javascript using <%= Request.ContentType %> to see if it is 'application/json'.If yes I want to execute the web method using jquery ajax method.If I write the streamreader 'sr' to a textbox I can see that <%= Request.ContentType %> gives 'application/json'.But my problem is the HTML of Second.aspx is loaded into the textbox on First.aspx but no redirection to Second.aspx is taking place.so I am unable to exceute the web method this way.
Please could someone help me how do I rediret to Second.aspx page with the above programmatically generated HTTP request code?
You don't. What you are doing is having your application make a web request, read it, and do nothing with it.
Your logic rather convoluted... I don't understand at all why you're doing what you're doing. But if you want to redirect the user to a new page, use Response.Redirect. If you want to execute the page and send the results back to the user use Server.Transfer.