// 发起 HTTP请求
static async Task <HttpResponseMessage> SendAsync(string uri, HttpConfiguration configuration, int tryTimes, int sleep)
{
if (uri != null)
{
#if netcore
if (uri.StartsWith("https", StringComparison.OrdinalIgnoreCase))
{
ServicePointManager.SecurityProtocol = SecurityProtocolType.SystemDefault | SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;
}
#endif
#if net45
if (uri.StartsWith("https", StringComparison.OrdinalIgnoreCase))
{
ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls | SecurityProtocolType.Tls11 | SecurityProtocolType.Tls12;
}
#endif
#if net40
if (uri.StartsWith("https", StringComparison.OrdinalIgnoreCase))
{
ServicePointManager.SecurityProtocol = SecurityProtocolType.Ssl3 | SecurityProtocolType.Tls | (SecurityProtocolType)768 | (SecurityProtocolType)3072;
}
#endif
}
// 初始化 HTTP 消息处理程序
HttpClientHandler handler = null;
if (configuration != null)
{
if (configuration.Proxy != null)
{
handler = new HttpClientHandler
{
Proxy = configuration.Proxy,
UseProxy = true
}
}
;
if (configuration.CookieContainer != null)
{
if (handler != null)
{
handler.CookieContainer = configuration.CookieContainer;
}
else
{
handler = new HttpClientHandler {
CookieContainer = configuration.CookieContainer
}
};
}
}
var client = handler != null ? new HttpClient(handler) : new HttpClient();
if (configuration != null && configuration.Timeout != null)
{
client.Timeout = new TimeSpan(0, 0, 0, 0, configuration.Timeout.Value);
}
// 初始化 HTTP 请求
var method = System.Net.Http.HttpMethod.Get;
if (configuration != null)
{
if (configuration.Method == HttpMethod.Get)
{
method = System.Net.Http.HttpMethod.Get;
}
else if (configuration.Method == HttpMethod.Post)
{
method = System.Net.Http.HttpMethod.Post;
}
else if (configuration.Method == HttpMethod.Put)
{
method = System.Net.Http.HttpMethod.Put;
}
else if (configuration.Method == HttpMethod.Delete)
{
method = System.Net.Http.HttpMethod.Delete;
}
else if (configuration.Method == HttpMethod.Head)
{
method = System.Net.Http.HttpMethod.Head;
}
else if (configuration.Method == HttpMethod.Trace)
{
method = System.Net.Http.HttpMethod.Trace;
}
else if (configuration.Method == HttpMethod.Options)
{
method = System.Net.Http.HttpMethod.Options;
}
}
var request = new HttpRequestMessage(method, uri);
if (configuration != null)
{
if (configuration.Accept != null)
{
request.Headers.Accept.Add(new MediaTypeWithQualityHeaderValue(configuration.Accept));
}
if (configuration.UserAgent != null)
{
request.Headers.UserAgent.Add(new ProductInfoHeaderValue(configuration.UserAgent, null));
}
if (configuration.KeepAlive != null)
{
request.Headers.Connection.Add("keep-alive");
}
string content = null;
if (configuration.Content != null && configuration.Content is string)
{
content = (string)configuration.Content;
}
else if (configuration.Content != null)
{
content = SerializeHelper.SerializeToJson(configuration.Content);
}
if (content != null)
{
var encoding = configuration.Encoding ?? Encoding.UTF8;
var contentType = configuration.ContentType ?? "application/json";
var httpContent = new StringContent(content, encoding ?? Encoding.UTF8, contentType);
request.Content = httpContent;
}
if (configuration.Headers != null)
{
// Authorization TODO
string scheme = null;
string token = null;
foreach (var kv in configuration.Headers)
{
if (string.Equals(kv.Key, "scheme", StringComparison.CurrentCultureIgnoreCase))
{
scheme = kv.Key;
}
else if (string.Equals(kv.Key, "token", StringComparison.CurrentCultureIgnoreCase))
{
token = kv.Key;
}
else
{
request.Headers.Add(kv.Key, kv.Value);
}
}
if (token != null)
{
if (scheme == null)
{
scheme = "Basic";
}
request.Headers.Authorization = new AuthenticationHeaderValue("Basic", token);
}
}
}
try
{
var response = await client.SendAsync(request);//.ConfigureAwait(false);
return(response);
}
catch (WebException we)
{
if (handler != null)
{
handler.Dispose();
}
if (client != null)
{
client.Dispose();
}
tryTimes--;
if (tryTimes > 0)
{
System.Threading.Thread.Sleep(sleep);
return(await WebHelper.SendAsync(uri, configuration, tryTimes, sleep));
}
else
{
WebHelper.ThrowWebException(we);
throw;
}
}
//MultipartFormDataContent => multipart/form-data
//FormUrlEncodedContent => application/x-www-form-urlencoded
//StringContent => application/json
//StreamContent => binary
}