public static string HttpGet(string url) { Encoding encoding = Encoding.UTF8; HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); request.Method = "GET"; request.Accept = "text/html, application/xhtml+xml, */*"; request.ContentType = "application/json"; HttpWebResponse response = (HttpWebResponse)request.GetResponse(); using (StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8)) { return reader.ReadToEnd(); } }改成异步
时间: 2024-02-14 17:04:59 浏览: 141
可以将该方法改成异步方法,代码如下:
```
public static async Task<string> HttpGetAsync(string url)
{
Encoding encoding = Encoding.UTF8;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
request.Method = "GET";
request.Accept = "text/html, application/xhtml+xml, */*";
request.ContentType = "application/json";
HttpWebResponse response = (HttpWebResponse)await request.GetResponseAsync();
using (StreamReader reader = new StreamReader(response.GetResponseStream(), Encoding.UTF8))
{
return await reader.ReadToEndAsync();
}
}
```
同样地,使用 `async` 和 `await` 关键字将网络请求部分改为异步操作,更加高效。
相关问题
public static int HttpGet(string url, out string reslut) { reslut = ""; try { HttpWebRequest wbRequest = (HttpWebRequest)WebRequest.Create(url); wbRequest.Proxy = null; wbRequest.Method = "GET"; HttpWebResponse wbResponse = (HttpWebResponse)wbRequest.GetResponse(); using (Stream responseStream = wbResponse.GetResponseStream()) { using (StreamReader sReader = new StreamReader(responseStream)) { reslut = sReader.ReadToEnd(); } } } catch (Exception e) { reslut = e.Message; //输出捕获到的异常,用OUT关键字输出 return -1; //出现异常,函数的返回值为-1 } return 0; }
这是一段 C# 代码,包含了一个名为 HttpGet 的函数,参数为一个 URL 字符串和一个输出参数 reslut 字符串。该函数会向指定的 URL 发送 GET 请求,并将响应转换成字符串存储在 reslut 参数中。如果出现异常,该函数会返回 -1,否则返回 0。
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url); request.Timeout = Timeout;
这段代码是在.NET Framework的WebRequest API中创建一个用于发送HTTP GET请求的对象。首先,通过`WebRequest.Create(url)`创建一个`HttpWebRequest`对象,这里`url`是你想要获取数据的URL。
然后,`request.Timeout`属性被设置为`Timeout`变量,这个值通常是一个表示时间间隔(例如毫秒或秒)的整数,用于指定网络请求的最大等待时间。如果服务器在规定的时间内没有响应,将会抛出`WebException`,其中包括`HttpRequestTimeoutException`,这表明请求超时了。
以下是完整的示例:
```csharp
int Timeout = 5000; // 设置超时时长为5秒钟(5000毫秒)
HttpWebRequest request = (HttpWebRequest)WebRequest.Create("http://example.com");
request.Method = "GET"; // 明确请求类型为GET
request.Timeout = Timeout; // 设置请求超时时间为5秒
try
{
using (WebResponse response = request.GetResponse())
{
// 处理响应...
}
}
catch (HttpRequestTimeoutException timeoutException)
{
Console.WriteLine("请求超时!");
}
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