在项目开发过程中，我们经常会访问第三方接口，如我们需要接入的第三方接口是Web API,这时候我们就需要使用HttpHelper调用远程接口了。示例中的HttpHelper类使用Log4Net记录了每次调用的请求内容和响应内容的日志，并且每条日志都带上了链路ID和标识，这样方便我们在排查问题时能快速的找到当时的请求和响应内容，进而定位分析问题。大家在使用的时候如不需要记录日志，删除掉即可。
HttpHelper类代码如下：
public class HttpHelper : IDisposable
{
private bool _disposable = false;
///
/// 请求编码格式默认utf-8;
///
public Encoding HtmlEncoding = Encoding.UTF8;
///
/// 请求时间
///
public int Timeout = 5000;
public CookieContainer Cookies = null;
///
/// 是否记录Cookies
///
public bool IsRecordCookie = false;
public string ContentType = "application/x-www-form-urlencoded";
public string AcceptLanguage = "en-US, en; q=0.8, zh-Hans-CN; q=0.5, zh-Hans; q=0.3";
public string KeepAlive = "Keep-Alive";
public string Accept = "*/*";
private const string UserAgent = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/42.0.2311.135 Safari/537.36 Edge/12.10240";
private static ILogger Logger = Log4NetLoggerFactory.Instance.Create("remote.info");
public HttpHelper()
{
//允许最大连接数，突破Http协议的并发连接数限制
ServicePointManager.DefaultConnectionLimit = 512;
}
///
/// 上传图片
///
///
///
///
///
/// 基本请求方法
///
/// HTTP请求类型
/// 请求的URL
/// 请求参数
/// 链路ID，方便查询日志
/// 请求标识，方便查询日志
/// resultLog = new Dictionary();//log对象
resultLog.Add("logType", "remote");
resultLog.Add("traceID", traceID);
resultLog.Add("localIp", IpHelper.LocalIp);
resultLog.Add("markType", markType);
resultLog.Add("url", url);
resultLog.Add("requestContent", HttpUtility.UrlDecode(requestData, Encoding.UTF8));
resultLog.Add("createTime", DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss.fff"));
StackTrace ss = new StackTrace(true);
System.Reflection.MethodBase mb = ss.GetFrame(2).GetMethod();//0表示当前栈空间，1表示上一级的栈空间，依次类推
resultLog.Add("className", mb.DeclaringType.FullName);
resultLog.Add("methodName", mb.Name);
HttpStatusCode statusCode = HttpStatusCode.OK;
if (IsRecordCookie)
Cookies = new CookieContainer();
Stream requestStream = null;
StreamReader streamReader = null;
HttpWebRequest webRe = null;
HttpWebResponse webPos = null;
try
{
if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
{
ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
webRe = WebRequest.Create(url) as HttpWebRequest;
webRe.ProtocolVersion = HttpVersion.Version10;
}
else
{
webRe = (HttpWebRequest)WebRequest.Create(url);
}
webRe.Headers.Add("Accept-Language", AcceptLanguage);
webRe.Headers.Add("Keep-Alive", KeepAlive);
webRe.UserAgent = UserAgent;
webRe.Accept = Accept;
webRe.Timeout = Timeout;
webRe.ReadWriteTimeout = Timeout;
webRe.CookieContainer = Cookies;
if (requestType == RequestType.Post)
{
webRe.ContentType = string.Format("{0}; {1}", ContentType, HtmlEncoding.BodyName);
byte[] datas = HtmlEncoding.GetBytes(requestData);
webRe.Method = "POST";
webRe.ContentLength = datas.Length;
webRe.MaximumResponseHeadersLength = -1;
requestStream = webRe.GetRequestStream();
requestStream.Write(datas, 0, datas.Length);
requestStream.Flush();
requestStream.Close();
}
else
webRe.Method = "GET";
webPos = (HttpWebResponse)webRe.GetResponse();
resultLog.Add("requestType", webRe.Method);
statusCode = webPos.StatusCode;
result.ResponseLength = webPos.ContentLength;
result.ResponseEncodingName = webPos.ContentEncoding;
requestStream = webPos.GetResponseStream();
if (webPos.StatusCode == HttpStatusCode.OK)
{
result.IsSuccess = 0;
if (requestStream != null)
{
streamReader = new StreamReader(requestStream, HtmlEncoding);
result.ResponseContent = streamReader.ReadToEnd();
}
}
}
catch (Exception ex)
{
result.IsSuccess = 1;
result.ResponseContent = ex.Message;
}
finally
{
if (requestStream != null)
{
requestStream.Close();
requestStream.Dispose();
}
if (streamReader != null)
{
streamReader.Close();
streamReader.Dispose();
}
webRe.Abort();
if (webPos != null)
webPos.Close();
}
if (result.IsSuccess == 1)
{
resultLog.Add("status", HttpStatusCode.InternalServerError);
resultLog.Add("success", false);
resultLog.Add("responseContent", result.ResponseContent);
stopwatch.Stop();
resultLog.Add("elapseTime", stopwatch.Elapsed.TotalMilliseconds);
string log = JsonConvert.SerializeObject(resultLog);
Logger.Info(log);
Logger.Error(log);
}
else
{
resultLog.Add("status", statusCode);
resultLog.Add("success", true);
resultLog.Add("responseContent", result.ResponseContent);
stopwatch.Stop();
resultLog.Add("elapseTime", stopwatch.Elapsed.TotalMilliseconds);
string log = JsonConvert.SerializeObject(resultLog);
Logger.Info(log);
}
return result;
}
private static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
{
return true; //总是接受
}
///
/// Get请求
///
/// 请求地址
/// 链路ID，方便查询日志
/// 请求标识，方便查询日志
///
/// Post请求
///
/// 请求地址Url
/// 请求内容参数
/// 链路ID，方便查询日志
/// 请求标识，方便查询日志
///
/// HttpHelper请求方式
///
public enum RequestType
{
///
/// Get请求
///
Get,
///
/// Post请求
///
Post
}
///
/// HttpHelper请求时返回实体
///
public class HttpRequestEntity
{
///
/// 请求是否成功 0-成功(返回Http状态码200) 1-失败(出现异常)
///
public int IsSuccess { get; set; }
///
/// 请求返回内容
///
public string ResponseContent { get; set; }
///
/// 请求返回内容长度
///
public long ResponseLength { get; set; }
///
/// 请求返回编码类型
///
public string ResponseEncodingName { get; set; }
}
调用示例如下：
HttpHelper helper = new HttpHelper();
HttpRequestEntity response = helper.Request("需要访问的URL", "请求需要的参数", "访问链路ID", "访问标识");
if (response.IsSuccess != 0)
{
//程序处理异常，请重试！
}
else
{
//请求响应成功
}
到此这篇关于C#实现HTTP访问类HttpHelper的示例详解的文章就介绍到这了,更多相关C# HTTP访问类HttpHelper内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！