如何在 c# 中使用身份驗證進行異步 GET？

Question

我需要使此代碼異步，而且 visual studio 告訴我我正在使用的 HttpWebResponse 已被棄用，盡管這是我可以使數據下載工作的唯一方法：

for (int i = 2; i <= Pages; i++)
{
        var request = (HttpWebRequest)WebRequest.Create("https://MYAPIPATH=" + i);
        request.Headers.Add("Authorization", "Basic " + encoded);
        request.Method = "GET";
        request.ContentType = "application/x-www-form-urlencoded";

        var response = (HttpWebResponse)request.GetResponse();
        var responseString = new StreamReader(response.GetResponseStream()).ReadToEnd();
        var MyResult = JsonConvert.DeserializeObject<RootObject_DataFeed>(responseString);

        string Products = JsonConvert.SerializeObject(MyResult.Products);
        File.WriteAllText(pathProducts + i + ".json", Products);

        using (Stream file = File.OpenWrite(pathProducts + i + ".json"))
        {
            wresp.GetResponseStream().CopyTo(file);
        }
}

       
            

我想要做的是讓下載速度更快，一次下載多個文件（因為大約有 3000 頁）

Answer 1

我建議您使用支持身份驗證機制的 http 客戶端。 例如

 string authUserName = "user";
 string authPassword = "password";
 string url = "https://someurl.com";

 var httpClient = new HttpClient();    
 var authToken = Encoding.ASCII.GetBytes($"{authUserName}:{authPassword}");
 httpClient.DefaultRequestHeaders.Authorization = new System.Net.Http.Headers.AuthenticationHeaderValue("Basic", Convert.ToBase64String(authToken));
 

var response = await httpClient.GetAsync(url);
response.EnsureSuccessStatusCode();

return await response.Content.ReadAsStringAsync();

然后你可以用你的字符串內容做同樣的動作