HttpWebResponse发送post请求并接收
HttpWebResponse发送post请求并接收
/// <summary>
/// 根据请求的xml，获取返回后的xml数据
/// </summary>
/// <param name="strRequestXml"></param>
/// <param name="isB">是否调用B接口地址</param>
/// <returns></returns>
public static string GetResponseXml(string strRequestXml, bool isB = true)
{
HttpWebRequest httpWebRequest;
string url = isB ? FreeConfig.TrafreeUrl_B : FreeConfig.TrafreeUrl_C;
//如果是发送HTTPS请求
if (url.StartsWith("https", StringComparison.OrdinalIgnoreCase))
{
ServicePointManager.ServerCertificateValidationCallback = CheckValidationResult;
httpWebRequest = WebRequest.Create(url) as HttpWebRequest;
httpWebRequest.ProtocolVersion = HttpVersion.Version10;
httpWebRequest.Headers.Add(HttpRequestHeader.AcceptEncoding, "gzip,deflate");
}
else
{
httpWebRequest = WebRequest.Create(url) as HttpWebRequest;
}
Encoding code = Encoding.GetEncoding(FreeConfig.InputCharset.Trim().ToLower());
//request.Timeout = 20000;
httpWebRequest.UserAgent =
"Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.11 (KHTML, like Gecko) Chrome/23.0.1271.97 Safari/537.11";
httpWebRequest.ContentType = "text/html;charset=" + FreeConfig.InputCharset.Trim().ToLower();
httpWebRequest.Method = "POST";
httpWebRequest.MaximumResponseHeadersLength = 999999999;
httpWebRequest.ReadWriteTimeout = 9999999;
byte[] bs = code.GetBytes(strRequestXml.Trim());
httpWebRequest.ContentLength = bs.Length;
using (Stream requestStream = httpWebRequest.GetRequestStream())
{
requestStream.Write(bs, 0, bs.Length);
requestStream.Close();
}
string strResponse = string.Empty;
using (var response = (HttpWebResponse)httpWebRequest.GetResponse())
{
//strResponse = GetResponseStraem(response, code);
strResponse = GetResponseStreamByBytes(response, code);
}
return strResponse;
}
private static string GetResponseStraem(HttpWebResponse response, Encoding code)
{
string strResponse = string.Empty;
Stream stream = response.GetResponseStream();
if (stream != null)
{
using (var read = new StreamReader(stream, code))
{
strResponse = read.ReadToEnd();
}
}
return strResponse;
}
private static string GetResponseStreamByBytes(HttpWebResponse response, Encoding code)
{
var bl = new List<byte>();
var stream = response.GetResponseStream();
int b;
while ((b = stream.ReadByte()) != -1)
{
bl.Add((byte)b);
}
return code.GetString(bl.ToArray());
}
private static bool CheckValidationResult(object sender, X509Certificate certificate, X509Chain chain, SslPolicyErrors errors)
{
return true; //总是接受
}
1. 获取流
HttpWebRequest request= (HttpWebRequest)WebRequest.Create(uri);
//构建http request
request.Method = "get";
HttpWebResponse response = (HttpWebResponse)hwr.GetResponse(); //发出请求并获得Response
resStream = response.GetResponseStream(); //获得Response的流
2. 读
1). 第一种方式:
int count = (int)response.ContentLength;
int offset = 0;
buf = new byte[count];
while (count > 0)
{
int n = resStream.Read(buf,offset,count);
if (n == 0) break;
count -= n;
offset += n;
Console.WriteLine( "in loop " + getString(buf) ); //测试循环次数
}
string content = Encoding.Default.GetString(buf, 0, buf.Length);
必须循环读流, 不能一次读(resStream.Read(buf,0,count); ), 否则读的流可能不完整
还有一种方式:
private static string GetResponseStreamByBytes(HttpWebResponse response, Encoding code)
{
var bl = new List<byte>();
var stream = response.GetResponseStream();
int b;
while ((b = stream.ReadByte()) != -1)
{
bl.Add((byte)b);
}
return code.GetString(bl.ToArray());
}
2) 第二种方式://用StreamReader读取流
string content = "";
using (StreamReader sr = new StreamReader(resStream))
{
content = sr.ReadToEnd();
}
