.net HttpClient簡(jiǎn)單使用
創(chuàng)建一個(gè)名為HttpClientTest的Web API項(xiàng)目
新建Clients文件夾，用于存放自定義的HttpClient
在Clients下新建一個(gè)MyHttpClient類
代碼為：
namespace HttpClientTest.Clients
{
public class MyHttpClient
{
private readonly HttpClient _client;
public MyHttpClient(HttpClient client)
{
_client = client;
}
public async Task<string> ShowAsync()
{
return await _client.GetStringAsync("https://www.baidu.com");
}
}
}
將自定義的MyHttpClient服務(wù)注冊(cè)進(jìn)容器中
services.AddHttpClient<MyHttpClient>();
新建一個(gè)TestController來(lái)對(duì)我們的MyHttpClient做一個(gè)測(cè)試
using HttpClientTest.Clients;
using Microsoft.AspNetCore.Mvc;
namespace HttpClientTest.Controllers
{
[ApiController]
[Route("[controller]/[action]")]
public class TestController : ControllerBase
{
private readonly MyHttpClient _myHttpClient;
public TestController(MyHttpClient myHttpClient)
{
_myHttpClient = myHttpClient;
}
[HttpGet]
public async Task<object> GetAsync()
{
return await _myHttpClient.ShowAsync();
}
}
}
訪問GetAsync接口，發(fā)現(xiàn)成功返回了百度首頁(yè)的html內(nèi)容
很多時(shí)候，我們希望通過相對(duì)路徑的方式來(lái)對(duì)遠(yuǎn)程服務(wù)進(jìn)行訪問
可以把MyHttpClient改為：
namespace HttpClientTest.Clients
{
public class MyHttpClient
{
private readonly HttpClient _client;
public MyHttpClient(HttpClient client)
{
_client = client;
}
public async Task<string> ShowAsync()
{
//return await _client.GetStringAsync("https://www.baidu.com");
return await _client.GetStringAsync("/");
}
}
}
在注冊(cè)服務(wù)時(shí)就要配置基地址
services.AddHttpClient<MyHttpClient>(client =>
{
client.BaseAddress = new Uri("https://www.baidu.com");
});
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原文鏈接：https://blog.csdn.net/m0_47659279/article/details/121509859
