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項目開發過程中，我們經常會訪問第三方接口，如我們需要接入的第三方接口是Web API,這時候我們就需要使用HttpHelper調用遠程接口了。示例中的HttpHelper類使用Log4Net記錄了每次調用的請求內容和響應內容的日志，并且每條日志都帶上了鏈路ID和標識，這樣方便我們在排查問題時能快速的找到當時的請求和響應內容，進而定位分析問題。大家在使用的時候如不需要記錄日志，刪除掉即可。

HttpHelper類代碼如下：

public class HttpHelper : IDisposable

{

private bool _disposable=false;

/// <summary>

/// 請求編碼格式默認utf-8;

/// </summary>

public Encoding HtmlEncoding=Encoding.UTF8;

/// <summary>

/// 請求時間

/// </summary>

public int Timeout=5000;

public CookieContainer Cookies=null;

/// <summary>

/// 是否記錄Cookies

/// </summary>

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()

{

//允許最大連接數，突破Http協議的并發連接數限制

ServicePointManager.DefaultConnectionLimit=512;

}

/// <summary>

/// 上傳圖片

/// </summary>

/// <param name="url"></param>

/// <param name="bArr"></param>

/// <param name="fileName"></param>

/// <returns></returns>

public HttpRequestEntity RequestFile(string url, byte[] bArr, string fileName="")

{

var result=new HttpRequestEntity { IsSuccess=0 };

//后續需要再放開，啟用時需增加日志收集

//if (string.IsNullOrEmpty(url))

// throw new ArgumentNullException("請求Url不能為空值");

//if (bArr==null || bArr.Length <=0)

// throw new AccessViolationException("缺少輸入數據");

//Stream requestStream=null;

//StreamReader streamReader=null;

//HttpWebResponse response=null;

//HttpWebRequest request=null;

//try

//{

// request=WebRequest.Create(url) as HttpWebRequest;

// request.AllowAutoRedirect=true;

// request.Method="POST";

// string boundary=DateTime.Now.Ticks.ToString("X"); // 隨機分隔線

// request.ContentType="multipart/form-data;charset=utf-8;boundary=" + boundary;

// byte[] itemBoundaryBytes=Encoding.UTF8.GetBytes("\r\n--" + boundary + "\r\n");

// byte[] endBoundaryBytes=Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n");

// if (string.IsNullOrEmpty(fileName))

// fileName=DateTime.Now.ToString("yyyyMMddHHmmss");

// //請求頭部信息

// StringBuilder sbHeader=new StringBuilder(string.Format("Content-Disposition:form-data;name=\"file\";filename=\"{0}\"\r\nContent-Type:application/octet-stream\r\n\r\n", fileName));

// byte[] postHeaderBytes=Encoding.UTF8.GetBytes(sbHeader.ToString());

// request.Headers.Add("auth", fileName);

// Stream postStream=request.GetRequestStream();

// postStream.Write(itemBoundaryBytes, 0, itemBoundaryBytes.Length);

// postStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);

// postStream.Write(bArr, 0, bArr.Length);

// postStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);

// postStream.Close();

// response=request.GetResponse() as HttpWebResponse;

// requestStream=response.GetResponseStream();

// if (response.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();

// }

// request.Abort();

// if (response !=null)

// response.Close();

//}

return result;

}

/// <summary>

/// 基本請求方法

/// </summary>

/// <param name="requestType">HTTP請求類型</param>

/// <param name="url">請求的URL</param>

/// <param name="requestData">請求參數</param>

/// <param name="traceID">鏈路ID，方便查詢日志</param>

/// <param name="markType">請求標識，方便查詢日志</param>

/// <returns></returns>

private HttpRequestEntity BaseRequest(RequestType requestType, string url, string requestData, string traceID,string markType)

{

var result=new HttpRequestEntity { IsSuccess=0 };

if (string.IsNullOrEmpty(url))

throw new ArgumentNullException("請求Url不能為空值");

Stopwatch stopwatch=new Stopwatch();

stopwatch.Start();

Dictionary<string, object> resultLog=new Dictionary<string, object>();//log對象

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表示當前棧空間，1表示上一級的?？臻g，依次類推

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; //總是接受

}

/// <summary>

/// Get請求

/// </summary>

/// <param name="url">請求地址</param>

/// <param name="traceID">鏈路ID，方便查詢日志</param>

/// <param name="markType">請求標識，方便查詢日志</param>

/// <returns></returns>

public HttpRequestEntity Request(string url, string traceID, string markType)

{

return BaseRequest(RequestType.Get, url, string.Empty, traceID, markType);

}

/// <summary>

/// Post請求

/// </summary>

/// <param name="url">請求地址Url</param>

/// <param name="requestData">請求內容參數</param>

/// <param name="traceID">鏈路ID，方便查詢日志</param>

/// <param name="markType">請求標識，方便查詢日志</param>

/// <returns></returns>

public HttpRequestEntity Request(string url, string requestData, string traceID, string markType)

{

return BaseRequest(RequestType.Post, url, requestData, traceID, markType);

}

~HttpHelper()

{

Dispose(false);

}

#region IDisposable 成員

public void Dispose()

{

Dispose(true);

GC.SuppressFinalize(this);

}

protected virtual void Dispose(bool disposing)

{

if (this._disposable)

return;

if (disposing)

{

}

_disposable=true;

}

#endregion

}

/// <summary>

/// HttpHelper請求方式

/// </summary>

public enum RequestType

{

/// <summary>

/// Get請求

/// </summary>

Get,

/// <summary>

/// Post請求

/// </summary>

Post

}

/// <summary>

/// HttpHelper請求時返回實體

/// </summary>

public class HttpRequestEntity

{

/// <summary>

/// 請求是否成功 0-成功(返回Http狀態碼200) 1-失敗(出現異常)

/// </summary>

public int IsSuccess { get; set; }

/// <summary>

/// 請求返回內容

/// </summary>

public string ResponseContent { get; set; }

/// <summary>

/// 請求返回內容長度

/// </summary>

public long ResponseLength { get; set; }

/// <summary>

/// 請求返回編碼類型

/// </summary>

public string ResponseEncodingName { get; set; }

}

調用示例如下：

HttpHelper helper=new HttpHelper();

HttpRequestEntity response=helper.Request("需要訪問的URL", "請求需要的參數", "訪問鏈路ID", "訪問標識");

if (response.IsSuccess !=0)

{

//程序處理異常，請重試！

}

else

{

//請求響應成功

}

如對您有幫助勞煩幫忙點個贊，收藏關注一下，相互學習，共同進步。

在項目開發過程中，我們經常會訪問第三方接口，如我們需要接入的第三方接口是Web API,這時候我們就需要使用HttpHelper調用遠程接口了。示例中的HttpHelper類使用Log4Net記錄了每次調用的請求內容和響應內容的日志，并且每條日志都帶上了鏈路ID和標識，這樣方便我們在排查問題時能快速的找到當時的請求和響應內容，進而定位分析問題。大家在使用的時候如不需要記錄日志，刪除掉即可。

HttpHelper類代碼如下：

public class HttpHelper : IDisposable

{

private bool _disposable=false;

/// <summary>

/// 請求編碼格式默認utf-8;

/// </summary>

public Encoding HtmlEncoding=Encoding.UTF8;

/// <summary>

/// 請求時間

/// </summary>

public int Timeout=5000;

public CookieContainer Cookies=null;

/// <summary>

/// 是否記錄Cookies

/// </summary>

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()

{

//允許最大連接數，突破Http協議的并發連接數限制

ServicePointManager.DefaultConnectionLimit=512;

}

/// <summary>

/// 上傳圖片

/// </summary>

/// <param name="url"></param>

/// <param name="bArr"></param>

/// <param name="fileName"></param>

/// <returns></returns>

public HttpRequestEntity RequestFile(string url, byte[] bArr, string fileName="")

{

var result=new HttpRequestEntity { IsSuccess=0 };

//后續需要再放開，啟用時需增加日志收集

//if (string.IsNullOrEmpty(url))

// throw new ArgumentNullException("請求Url不能為空值");

//if (bArr==null || bArr.Length <=0)

// throw new AccessViolationException("缺少輸入數據");

//Stream requestStream=null;

//StreamReader streamReader=null;

//HttpWebResponse response=null;

//HttpWebRequest request=null;

//try

//{

// request=WebRequest.Create(url) as HttpWebRequest;

// request.AllowAutoRedirect=true;

// request.Method="POST";

// string boundary=DateTime.Now.Ticks.ToString("X"); // 隨機分隔線

// request.ContentType="multipart/form-data;charset=utf-8;boundary=" + boundary;

// byte[] itemBoundaryBytes=Encoding.UTF8.GetBytes("\r\n--" + boundary + "\r\n");

// byte[] endBoundaryBytes=Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n");

// if (string.IsNullOrEmpty(fileName))

// fileName=DateTime.Now.ToString("yyyyMMddHHmmss");

// //請求頭部信息

// StringBuilder sbHeader=new StringBuilder(string.Format("Content-Disposition:form-data;name=\"file\";filename=\"{0}\"\r\nContent-Type:application/octet-stream\r\n\r\n", fileName));

// byte[] postHeaderBytes=Encoding.UTF8.GetBytes(sbHeader.ToString());

// request.Headers.Add("auth", fileName);

// Stream postStream=request.GetRequestStream();

// postStream.Write(itemBoundaryBytes, 0, itemBoundaryBytes.Length);

// postStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);

// postStream.Write(bArr, 0, bArr.Length);

// postStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);

// postStream.Close();

// response=request.GetResponse() as HttpWebResponse;

// requestStream=response.GetResponseStream();

// if (response.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();

// }

// request.Abort();

// if (response !=null)

// response.Close();

//}

return result;

}

/// <summary>

/// 基本請求方法

/// </summary>

/// <param name="requestType">HTTP請求類型</param>

/// <param name="url">請求的URL</param>

/// <param name="requestData">請求參數</param>

/// <param name="traceID">鏈路ID，方便查詢日志</param>

/// <param name="markType">請求標識，方便查詢日志</param>

/// <returns></returns>

private HttpRequestEntity BaseRequest(RequestType requestType, string url, string requestData, string traceID,string markType)

{

var result=new HttpRequestEntity { IsSuccess=0 };

if (string.IsNullOrEmpty(url))

throw new ArgumentNullException("請求Url不能為空值");

Stopwatch stopwatch=new Stopwatch();

stopwatch.Start();

Dictionary<string, object> resultLog=new Dictionary<string, object>();//log對象

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表示當前?？臻g，1表示上一級的?？臻g，依次類推

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; //總是接受

}

/// <summary>

/// Get請求

/// </summary>

/// <param name="url">請求地址</param>

/// <param name="traceID">鏈路ID，方便查詢日志</param>

/// <param name="markType">請求標識，方便查詢日志</param>

/// <returns></returns>

public HttpRequestEntity Request(string url, string traceID, string markType)

{

return BaseRequest(RequestType.Get, url, string.Empty, traceID, markType);

}

/// <summary>

/// Post請求

/// </summary>

/// <param name="url">請求地址Url</param>

/// <param name="requestData">請求內容參數</param>

/// <param name="traceID">鏈路ID，方便查詢日志</param>

/// <param name="markType">請求標識，方便查詢日志</param>

/// <returns></returns>

public HttpRequestEntity Request(string url, string requestData, string traceID, string markType)

{

return BaseRequest(RequestType.Post, url, requestData, traceID, markType);

}

~HttpHelper()

{

Dispose(false);

}

#region IDisposable 成員

public void Dispose()

{

Dispose(true);

GC.SuppressFinalize(this);

}

protected virtual void Dispose(bool disposing)

{

if (this._disposable)

return;

if (disposing)

{

}

_disposable=true;

}

#endregion

}

/// <summary>

/// HttpHelper請求方式

/// </summary>

public enum RequestType

{

/// <summary>

/// Get請求

/// </summary>

Get,

/// <summary>

/// Post請求

/// </summary>

Post

}

/// <summary>

/// HttpHelper請求時返回實體

/// </summary>

public class HttpRequestEntity

{

/// <summary>

/// 請求是否成功 0-成功(返回Http狀態碼200) 1-失敗(出現異常)

/// </summary>

public int IsSuccess { get; set; }

/// <summary>

/// 請求返回內容

/// </summary>

public string ResponseContent { get; set; }

/// <summary>

/// 請求返回內容長度

/// </summary>

public long ResponseLength { get; set; }

/// <summary>

/// 請求返回編碼類型

/// </summary>

public string ResponseEncodingName { get; set; }

}

調用示例如下：

HttpHelper helper=new HttpHelper();

HttpRequestEntity response=helper.Request("需要訪問的URL", "請求需要的參數", "訪問鏈路ID", "訪問標識");

if (response.IsSuccess !=0)

{

//程序處理異常，請重試！

}

else

{

//請求響應成功

}

如對您有幫助勞煩幫忙點個贊，收藏關注一下，相互學習，共同進步。