HttpHelper类的调用方法详解

2024-02-17 17:42:02 174

本文实例为大家分享了HttpHelper类的方法使用，供大家参考，具体内容如下

首先列出HttpHelper类

///
///Http操作类
///
publicclassHttpHelper
{
privatestaticlog4net.ILogmLog=log4net.LogManager.GetLogger("HttpHelper");

[DllImport("wininet.dll",CharSet=CharSet.Auto,SetLastError=true)]
publicstaticexternboolInternetSetCookie(stringlpszUrlName,stringlbszCookieName,stringlpszCookieData);

[DllImport("wininet.dll",CharSet=CharSet.Auto,SetLastError=true)]
publicstaticexternboolInternetGetCookie(stringlpszUrlName,stringlbszCookieName,StringBuilderlpszCookieData,refintlpdwSize);
publicstaticStreamReadermLastResponseStream=null;
publicstaticSystem.IO.StreamReaderLastResponseStream
{
get{returnmLastResponseStream;}
}
privatestaticCookieContainermCookie=null;
publicstaticCookieContainerCookie
{
get{returnmCookie;}
set{mCookie=value;}
}
privatestaticCookieContainermLastCookie=null;
publicstaticHttpWebRequestCreateWebRequest(stringurl,HttpRequestTypehttpType,stringcontentType,stringdata,EncodingrequestEncoding,inttimeout,boolkeepAlive)
{
if(String.IsNullOrWhiteSpace(url))
{
thrownewException("URL为空");
}
HttpWebRequestwebRequest=null;
StreamrequestStream=null;
byte[]datas=null;
switch(httpType)
{
caseHttpRequestType.GET:
caseHttpRequestType.DELETE:
if(!String.IsNullOrWhiteSpace(data))
{
if(!url.Contains('?'))
{
url+="?"+data;
}
elseurl+="&"+data;
}
if(url.StartsWith("https:"))
{
System.Net.ServicePointManager.SecurityProtocol=SecurityProtocolType.Tls11|SecurityProtocolType.Tls12;
ServicePointManager.ServerCertificateValidationCallback=newSystem.Net.Security.RemoteCertificateValidationCallback(CheckValidationResult);
}
webRequest=(HttpWebRequest)WebRequest.Create(url);
webRequest.Method=Enum.GetName(typeof(HttpRequestType),httpType);
if(contentType!=null)
{
webRequest.ContentType=contentType;
}
if(mCookie==null)
{
webRequest.CookieContainer=newCookieContainer();
}
else
{
webRequest.CookieContainer=mCookie;
}
if(keepAlive)
{
webRequest.KeepAlive=keepAlive;
webRequest.ReadWriteTimeout=timeout;
webRequest.Timeout=60000;
mLog.Info("请求超时时间..."+timeout);
}
break;
default:
if(url.StartsWith("https:"))
{
System.Net.ServicePointManager.SecurityProtocol=SecurityProtocolType.Tls11|SecurityProtocolType.Tls12;
ServicePointManager.ServerCertificateValidationCallback=newSystem.Net.Security.RemoteCertificateValidationCallback(CheckValidationResult);
}
webRequest=(HttpWebRequest)WebRequest.Create(url);
webRequest.Method=Enum.GetName(typeof(HttpRequestType),httpType);
if(contentType!=null)
{
webRequest.ContentType=contentType;
}
if(mCookie==null)
{
webRequest.CookieContainer=newCookieContainer();
}
else
{
webRequest.CookieContainer=mCookie;
}
if(keepAlive)
{
webRequest.KeepAlive=keepAlive;
webRequest.ReadWriteTimeout=timeout;
webRequest.Timeout=60000;
mLog.Info("请求超时时间..."+timeout);
}
if(!String.IsNullOrWhiteSpace(data))
{
datas=requestEncoding.GetBytes(data);
}
if(datas!=null)
{
webRequest.ContentLength=datas.Length;
requestStream=webRequest.GetRequestStream();
requestStream.Write(datas,0,datas.Length);
requestStream.Flush();
requestStream.Close();
}
break;
}
//mLog.InfoFormat("请求Url:{0},HttpRequestType:{1},contentType：{2},data:{3}",url,Enum.GetName(typeof(HttpRequestType),httpType),contentType,data);
returnwebRequest;
}
publicstaticCookieContainerGetLastCookie()
{
returnmLastCookie;
}
///
///设置HTTP的Cookie，以后发送和请求用此Cookie
///
///CookieContainer
publicstaticvoidSetHttpCookie(CookieContainercookie)
{
mCookie=cookie;
}
privatestaticHttpWebRequestmLastAsyncRequest=null;
publicstaticHttpWebRequestLastAsyncRequest
{
get{returnmLastAsyncRequest;}
set{mLastAsyncRequest=value;}
}
///
///发送请求
///
///请求Url
///请求类型
///contentType：application/x-www-form-urlencoded
///请求数据
///请求数据传输时编码格式
///返回请求结果
publicstaticstringSendRequest(stringurl,HttpRequestTypehttpType,stringcontentType,stringdata,EncodingrequestEncoding,EncodingreponseEncoding,paramsAsyncCallback[]callBack)
{

inttimeout=0;
boolkeepAlive=false;
if(callBack!=null&&callBack.Length>0&&callBack[0]!=null)
{
keepAlive=true;
timeout=1000*60*60;
mLog.Info("写入读取超时时间..."+timeout);
}
//mLog.Info("开始创建请求....");
HttpWebRequestwebRequest=CreateWebRequest(url,httpType,contentType,data,requestEncoding,timeout,keepAlive);
stringret=null;
//mLog.Info("创建请求结束....");
if(callBack!=null&&callBack.Length>0&&callBack[0]!=null)
{
//mLog.Info("开始异步请求....");
mLastAsyncRequest=webRequest;
webRequest.BeginGetResponse(callBack[0],webRequest);
}
else
{
//mLog.Info("开始同步请求....");
StreamReadersr=newStreamReader(webRequest.GetResponse().GetResponseStream(),reponseEncoding);
ret=sr.ReadToEnd();
sr.Close();
}
mLastCookie=webRequest.CookieContainer;
//mLog.InfoFormat("结束请求Url:{0},HttpRequestType:{1},contentType：{2},结果：{3}",url,Enum.GetName(typeof(HttpRequestType),httpType),contentType,ret);
returnret;
}

///
///Http上传文件
///
publicstaticstringHttpUploadFile(stringurl,stringpath)
{
using(FileStreamfs=newFileStream(path,FileMode.Open,FileAccess.Read))
{
//设置参数
HttpWebRequestrequest=WebRequest.Create(url)asHttpWebRequest;
CookieContainercookieContainer=newCookieContainer();
request.CookieContainer=cookieContainer;
request.AllowAutoRedirect=true;
request.AllowWriteStreamBuffering=false;
request.SendChunked=true;
request.Method="POST";
request.Timeout=300000;

stringboundary=DateTime.Now.Ticks.ToString("X");//随机分隔线
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");
intpos=path.LastIndexOf("\\");
stringfileName=path.Substring(pos+1);

//请求头部信息
StringBuildersbHeader=newStringBuilder(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.ContentLength=itemBoundaryBytes.Length+postHeaderBytes.Length+fs.Length+endBoundaryBytes.Length;
using(StreampostStream=request.GetRequestStream())
{
postStream.Write(itemBoundaryBytes,0,itemBoundaryBytes.Length);
postStream.Write(postHeaderBytes,0,postHeaderBytes.Length);
intbytesRead=0;

intarrayLeng=fs.Length<=4096?(int)fs.Length:4096;
byte[]bArr=newbyte[arrayLeng];
intcounter=0;
while((bytesRead=fs.Read(bArr,0,arrayLeng))!=0)
{
counter++;
postStream.Write(bArr,0,bytesRead);
}
postStream.Write(endBoundaryBytes,0,endBoundaryBytes.Length);
}

//发送请求并获取相应回应数据
using(HttpWebResponseresponse=request.GetResponse()asHttpWebResponse)
{
//直到request.GetResponse()程序才开始向目标网页发送Post请求
using(Streaminstream=response.GetResponseStream())
{
StreamReadersr=newStreamReader(instream,Encoding.UTF8);
//返回结果网页（html）代码
stringcontent=sr.ReadToEnd();
returncontent;
}
}
}
}

publicstaticstringHttpUploadFile(stringurl,MemoryStreamfiles,stringfileName)
{
using(MemoryStreamfs=files)
{
//设置参数
HttpWebRequestrequest=WebRequest.Create(url)asHttpWebRequest;
CookieContainercookieContainer=newCookieContainer();
request.CookieContainer=cookieContainer;
request.AllowAutoRedirect=true;
request.AllowWriteStreamBuffering=false;
request.SendChunked=true;
request.Method="POST";
request.Timeout=300000;

stringboundary=DateTime.Now.Ticks.ToString("X");//随机分隔线
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");

//请求头部信息
StringBuildersbHeader=newStringBuilder(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.ContentLength=itemBoundaryBytes.Length+postHeaderBytes.Length+fs.Length+endBoundaryBytes.Length;
using(StreampostStream=request.GetRequestStream())
{
postStream.Write(itemBoundaryBytes,0,itemBoundaryBytes.Length);
postStream.Write(postHeaderBytes,0,postHeaderBytes.Length);
intbytesRead=0;

intarrayLeng=fs.Length<=4096?(int)fs.Length:4096;
byte[]bArr=newbyte[arrayLeng];
intcounter=0;
fs.Position=0;
while((bytesRead=fs.Read(bArr,0,arrayLeng))!=0)
{
counter++;
postStream.Write(bArr,0,bytesRead);
}
postStream.Write(endBoundaryBytes,0,endBoundaryBytes.Length);
}

//发送请求并获取相应回应数据
using(HttpWebResponseresponse=request.GetResponse()asHttpWebResponse)
{
//直到request.GetResponse()程序才开始向目标网页发送Post请求
using(Streaminstream=response.GetResponseStream())
{
StreamReadersr=newStreamReader(instream,Encoding.UTF8);
//返回结果网页（html）代码
stringcontent=sr.ReadToEnd();
returncontent;
}
}
}
}

#regionpublicstatic方法

///
///将请求的流转化为字符串
///
///
///
publicstaticstringGetStr(Streaminfo)
{
stringresult="";
try
{
using(StreamReadersr=newStreamReader(info,System.Text.Encoding.UTF8))
{
result=sr.ReadToEnd();
sr.Close();
}
}
catch
{
}
returnresult;
}

///
///参数转码
///
///
///
publicstaticstringstringDecode(stringstr)
{
returnHttpUtility.UrlDecode(HttpUtility.UrlDecode(str,System.Text.Encoding.GetEncoding("UTF-8")),System.Text.Encoding.GetEncoding("UTF-8"));
}

///
///json反序列化
///
///
///
///
publicstaticTDeserialize(stringjson)
{
try
{
Tobj=Activator.CreateInstance();
using(MemoryStreamms=newMemoryStream(System.Text.Encoding.UTF8.GetBytes(json)))
{
DataContractJsonSerializerserializer=newDataContractJsonSerializer(obj.GetType());
return(T)serializer.ReadObject(ms);
}
}
catch
{
returndefault(T);
}
}

#endregion

publicstaticboolCheckValidationResult(objectsender,X509Certificatecertificate,X509Chainchain,SslPolicyErrorssslPolicyErrors)
{//总是接受
returntrue;
}

}
publicenumHttpRequestType
{
POST,
GET,
DELETE,
PUT,
PATCH,
HEAD,
TRACE,
OPTIONS
}

然后列出HttpHelper的调用

1、不带参数调用

publicboolConnectServer()
{
try
{
stringurl="https://i.cnblogs.com";

stringxml=HttpHelper.SendRequest(url,HttpRequestType.POST,null,null,Encoding.UTF8,Encoding.UTF8);
NormalResponsenr=HuaweiXMLHelper.GetNormalResponse(xml);
if(nr.Code=="0")
{
HttpHelper.SetHttpCookie(HttpHelper.GetLastCookie());
mIsConnect=true;
returntrue;
}
else
{
mIsConnect=false;
returnfalse;
}
}
catch(System.Exceptionex)
{
mIsConnect=false;
returnfalse;
}
}

2.带参数调用

privateboolHandleIntelligentTask(stringtaskId,boolbStop)
{
try
{
if(!mIsConnect)
{
returnfalse;
}
StringBuildersb=newStringBuilder();
sb.AppendFormat("\r\n");
sb.AppendFormat("{0}\r\n",taskId);//
sb.AppendFormat("{0}\r\n",bStop?0:1);
sb.AppendFormat("\r\n");
stringxml=sb.ToString();
stringurl=mIAServerUrl+"/sdk_service/rest/video-analysis/handle-intelligent-analysis";
stringxml2=HttpHelper.SendRequest(url,HttpRequestType.POST,"text/plain;charset=utf-8",xml,Encoding.UTF8,Encoding.UTF8);
NormalResponsenr=HuaweiXMLHelper.GetNormalResponse(xml2);
if(nr.Code=="0")
{
returntrue;
}
else
{
returnfalse;
}
}
catch(System.Exceptionex)
{
returnfalse;
}

}

3.异步调用

privatevoidReStartAlarmServer(Listlist,stringalarmUrl,Thread[]listThread)
{
StopAlarm(alarmUrl,listThread);
listThread[0]=newThread(newThreadStart(delegate()
{
try
{
if(!mIsConnect)
{
mLog.Error("未登录！--ReStartAlarmServer-结束！");
return;
}
mLog.Info("ReStartAlarmServer开始报警连接....");
if(String.IsNullOrWhiteSpace(alarmUrl))return;
mLog.InfoFormat("ReStartAlarmServer请求报警：URL={0}",alarmUrl);
stringxml="task-id=0";
stringxml2=HttpHelper.SendRequest(alarmUrl,HttpRequestType.POST,"application/x-www-form-urlencoded",xml,Encoding.UTF8,Encoding.UTF8,AlarmCallBack);
mLog.Info("ReStartAlarmServer报警连接成功！");
}
catch(System.Threading.ThreadAbortExceptionex)
{
mLog.Info("ReStartAlarmServer线程已人为终止！"+ex.Message,ex);
}
catch(System.Exceptionex)
{
mLog.Error("ReStartAlarmServer开始报警连接失败:"+ex.Message,ex);
mLog.Info("ReStartAlarmServer开始重新报警连接....");
mTimes=50;
}
finally
{

}
}));
listThread[0].IsBackground=true;
listThread[0].Start();
}
privatevoidAlarmCallBack(IAsyncResultir)
{
try
{
HttpWebRequestwebRequest=(HttpWebRequest)ir.AsyncState;
stringsalarmUrl=webRequest.Address.OriginalString;
Thread[]alarmThead=dicAlarmUrls[salarmUrl];
HttpWebResponseresponse=(HttpWebResponse)webRequest.EndGetResponse(ir);
Streamstream=response.GetResponseStream();
alarmThead[1]=newThread(newThreadStart(delegate()
{
try
{
byte[]buffer=newbyte[mAlarmReadCount];
intcount=0;
stringstrMsg="";
intstartIndex=-1;
intendIndex=-1;

NormalResponseres=null;
DateTimedtStart=DateTime.Now;
DateTimedtEnd=DateTime.Now;
while(!mIsCloseAlarm)
{
count=stream.Read(buffer,0,mAlarmReadCount);
if(count>0)
{
strMsg+=Encoding.UTF8.GetString(buffer,0,count);
startIndex=strMsg.IndexOf("");
endIndex=strMsg.IndexOf("");
stringxml=strMsg.Substring(startIndex,endIndex-startIndex+"".Length);
res=HuaweiXMLHelper.GetNormalResponse(xml);
strMsg=strMsg.Substring(endIndex+"".Length);
startIndex=-1;
endIndex=-1;
break;
}
dtEnd=DateTime.Now;
if((dtEnd-dtStart).TotalSeconds>10)
{
thrownewException("连接信息未有获取到，需要重启报警！");
}
}
while(!mIsCloseAlarm)
{
count=stream.Read(buffer,0,mAlarmReadCount);
if(count>0)
{
stringtemp=Encoding.UTF8.GetString(buffer,0,count);
strMsg+=temp;
while(strMsg.Length>0)
{
if(startIndex==-1)//未发现第一个
{
startIndex=strMsg.IndexOf("");
if(startIndex==-1)
{
if(strMsg.Length>="".Length)
{
strMsg=strMsg.Substring(strMsg.Length-"".Length);
}
break;
}
}
if(startIndex>=0)
{
inti=startIndex+"".Length;
inttaskInfoEndIndex=strMsg.IndexOf("",i);
if(taskInfoEndIndex>0)//必须有任务结束节点
{
i=taskInfoEndIndex+"".Length;
inti1=strMsg.IndexOf("",i);//找到轨迹节点结束
inti2=strMsg.IndexOf("",i);//找到报警节点结束,发现一条报警
if(i1==-1&&i2==-1)//没有标志结束
{
break;
}
elseif(i1>=0&&(i1".Length);
startIndex=-1;
endIndex=-1;
continue;
}
elseif(i2>0&&(i2".Length)+"";

Threadth=newThread(newThreadStart(delegate()
{
ParseAlarmXml(alarmXml);
}));
th.IsBackground=true;
th.Start();

strMsg=strMsg.Substring(endIndex+"".Length);
startIndex=-1;
endIndex=-1;
continue;
}
}
else
{
break;
}
}
}
}
else
{
Console.WriteLine("##########读取报警反馈：无");
Thread.Sleep(1000);
}
}
}
catch(System.Threading.ThreadAbortExceptionex)
{
mLog.Info("AlarmCallBack...7");
try
{
if(stream!=null)
{
stream.Close();
stream.Dispose();
response.Close();
}
}
catch
{
}
mLog.Info("AlarmCallBack线程已人为终止！--0"+ex.Message,ex);
}
catch(IOExceptionex)
{
mLog.Info("AlarmCallBack...8");
try
{
if(stream!=null)
{
stream.Close();
stream.Dispose();
response.Close();
}
}
catch
{
}
}
catch(ObjectDisposedExceptionex)
{
mLog.Info("AlarmCallBack...9");
mLog.Info("AlarmCallBack读取流已人为终止！--2"+ex.Message,ex);
try
{
if(stream!=null)
{
stream.Close();
stream.Dispose();
response.Close();
}
}
catch
{
}
}
catch(System.Exceptionex)
{
mLog.Info("AlarmCallBack...10");
mLog.Error("AlarmCallBack0:"+ex.Message,ex);
try
{
if(stream!=null)
{
stream.Close();
stream.Dispose();
response.Close();
}
}
catch
{
}


}
finally
{

}
}));
alarmThead[1].IsBackground=true;
alarmThead[1].Start();

}
catch(System.Exceptionex)
{
mLog.Info("AlarmCallBack...11");
mLog.Error("AlarmCallBack1:"+ex.Message,ex);
mLog.Info("AlarmCallBack开始重新报警连接....3");
mTimes=50;
}
finally
{

}
}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持毛票票。

HttpHelper类的调用方法详解

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