Working with HTTP

A WebClient façade class for simple download/upload operations via HTTP or FTP

WebRequest and WebResponse classes for low-level control over client-side HTTP or FTP operations

HttpClient for consuming HTTP web APIs and RESTful services

1. Concurrent requests

var client = new HttpClient();

var task1 = client.GetStringAsync ("http://www.linqpad.net");

var task2 = client.GetStringAsync ("http://www.albahari.com");

Console.WriteLine (await task1);

Console.WriteLine (await task2);

2. GetAsync and response messages, do handle exception

var client = new HttpClient();

// The GetAsync method also accepts a CancellationToken.

HttpResponseMessageresponse = await client.GetAsync ("http://...");

response.EnsureSuccessStatusCode();

string html = await response.Content.ReadAsStringAsync();

3. SendAsync and request messages

var client = new HttpClient();

var request = new HttpRequestMessage (HttpMethod.Get, "http://...");

HttpResponseMessage response = await client.SendAsync (request);

response.EnsureSuccessStatusCode();

GetAsync is one of four methods corresponding to HTTP’s four verbs (the others are PostAsync, PutAsync, DeleteAsync).

The four methods are all shortcuts for calling SendAsync, the single low-level method into which everything else feeds.

巴特西

Working with HTTP

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