dotnet-httpclient

问题 In trying to make a Web API in c# and consume it via c# HttpClient, I've already written some controllers and client calls and is working fine, but now I need to call a Post method with two parameters, one simple value (long) directly in the URL[FromURI], and the another one is a complex type passed in body. I think I can simplify the answer, suppose I just want to call a post or put with one simple parameter passed in the URL. First of all, lets see my web server mapping config:

问题 I am dealing with a piece of code that looks like this: public class Uploader : IUploader { public Uploader() { // assign member variables to dependency injected interface implementations } public async Task<string> Upload(string url, string data) { HttpResponseMessage result; try { var handler = new HttpClientHandler(); var client = new HttpClient(handler); result = await client.PostAsync(url, new FormUrlEncodedContent(data)); if (result.StatusCode != HttpStatusCode.OK) { return "Some Error

问题 I'm porting a W8 application that uses httpclient library to connect to our server. The main purpose of the application is to send images, but when I try to send pictures on my WP8 I got a 404 not found error (seems that Microsoft remapped to 404 a lot of errors), if i check the server logs, I can see that the server recevied about 1/4 of the image before failling. The same function seems to works fine in my W8 application (didn't tested on 3G), and works on WP8 if I use Wifi connection. I

问题 I can't seem to get this code to work: ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12; HttpClient client = new HttpClient(); client.BaseAddress = new Uri("https://login.salesforce.com"); client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/x-www-form-urlencoded")); client.DefaultRequestHeaders.Add("User-Agent", "SFAPIClient"); //Random Client var parameters = new Dictionary<string, string>(); parameters["grant_type"] = "password";

问题 I've read a lot of conflicting answers about this and still don't have it straight. I have a .net core 1.1 web app that hits a lot of external api's for various data sources. My curent implementation uses DI to pass a custom "webclient" class to each controller, which internally creates and disposes a httpclient for each request (inside a using block). I see a ton of idle connections on the server so I'm pretty sure this is causing these. I also have some issues with the .net core app

问题 I'm building an application in an environment that's configured with Kerberos authentication. My application uses .NET's HttpClient to POST some data to an API hosted in IIS on a different server. GET requests seem to be working fine, but POSTs to the same service instantly implode with the following exception: System.Net.Http.HttpRequestException: Error while copying content to a stream. ---> System.IO.IOException: The read operation failed, see inner exception. ---> System.Net.WebException:

问题 I'm building an application in an environment that's configured with Kerberos authentication. My application uses .NET's HttpClient to POST some data to an API hosted in IIS on a different server. GET requests seem to be working fine, but POSTs to the same service instantly implode with the following exception: System.Net.Http.HttpRequestException: Error while copying content to a stream. ---> System.IO.IOException: The read operation failed, see inner exception. ---> System.Net.WebException:

问题 I'm using the HttpClient and I need to set a non-standard type for the HttpMethod . Where using HttpWebRequest only expects a string, HttpClient expects an HttpMethod . Enumerating the available values in HttpMethod , I don't see a way to add a custom one. Any thoughts? 回答1: Don't know why I didn't think of trying this before, but I can call new HttpMethod("MYMETHOD"); 回答2: Thank you so much. I tried the weirdest stuff, but i did not see this simple solution :) I try to use CalDAV REST

问题 As per reference document at https://docs.microsoft.com/en-us/dotnet/framework/network-programming/how-to-configure-network-tracing We can setup this in web.config or any other configuration file and we get detailed system.net traces, packets traces for HttpClient calls and any kind of issue in HttpClient calls can be captured in traces, be it certificate, TLS or anything else. However, do we have similar implementation for dotnet core / standard which can be used in both web app or console

问题 Using VS 2017 .Net 4.5.2 I have the following class public static class MyHttpClient { //fields private static Lazy<Task<HttpClient>> _Client = new Lazy<Task<HttpClient>>(async () => { var client = new HttpClient(); await InitClient(client).ConfigureAwait(false); return client; }); //properties public static Task<HttpClient> ClientTask => _Client.Value; //methods private static async Task InitClient(HttpClient client) { //resey headers client.DefaultRequestHeaders.Clear(); //Set base URL, NOT