/// <summary> 创建Get请求对象 </summary>
/// <param name="param"></param>
/// <returns></returns>
private static HttpWebRequest createHttpWebGetRequest(HttpTaskParams param)
{
if (param.getStringParams() == null)
{
return((HttpWebRequest)HttpWebRequest.Create(param.Url));
}
StringBuilder urlSb = new StringBuilder();
urlSb.Append(param.Url);
if (param.HasStringParams())
{
if (param.Url.Contains("?"))
{
urlSb.Append('?');
}
if (param.Url.Contains("&"))
{
urlSb.Append("&");
}
}
urlSb.Append(GetStringByPairs(param.getStringParams(), param.IsAutoEncoding()));
HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(urlSb.ToString());
return(request);
}
/// <summary> 设置请求体 </summary>
/// <param name="request"></param>
/// <param name="param"> </param>
public static void SetHttpWebRequestBodyContent(HttpWebRequest request, HttpTaskParams param)
{
if (request == null || param == null)
{
return;
}
if (param.Method == HttpTaskParams.METHOD_GET)
{
//nothing,get 请求没有请求体，也不允许写请求体?
}
else
{
//POST 或 其他类型，优先写自定义请求体
if (string.IsNullOrEmpty(param.CustomStringContentBody))
{
if (param.getFileParams() == null)
{
//写post请求体
SetHttpWebRequestStringBodyContent(request, GetStringByPairs(param.getStringParams(), param.IsAutoEncoding()));
}
else
{
//写上传请求体
SetHttpWebRequestUploadBodyContent(request, param);
}
}
else
{
//写自定义请求体
SetHttpWebRequestStringBodyContent(request, param.CustomStringContentBody);
}
}
}
/// <summary> 设置上传请求体 </summary>
/// <param name="request"></param>
/// <param name="param"> </param>
private static void SetHttpWebRequestUploadBodyContent(HttpWebRequest request, HttpTaskParams param)
{
if (request == null || param == null)
{
return;
}
// 1.构造分界线标识
string boundary = string.Format("----{0}", DateTime.Now.Ticks.ToString("x")); // 分界线可以自定义参数
byte[] boundaryBytes = Encoding.UTF8.GetBytes(string.Format("\r\n--{0}\r\n", boundary));
//2.上传header属性设置
request.Method = "POST";
request.ContentType = string.Format("multipart/form-data; boundary={0}", boundary);
byte[] bytes = null;
Stream stream = request.GetRequestStream();
//4.写 key value 数据
List <NameValuePair> pairs = param == null ? null : param.getStringParams();
if (pairs != null && pairs.Count > 0)
{
string pairStr;
NameValuePair pair;
for (int i = 0; i < pairs.Count; i++)
{
//写分割线
stream.Write(boundaryBytes, 0, boundaryBytes.Length);
//写key value
pair = pairs[i];
pairStr = string.Format("Content-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}", pair.Name, pair.Value);
bytes = Encoding.UTF8.GetBytes(pairStr);
stream.Write(bytes, 0, bytes.Length);
}
}
//5.写上传文件数据
List <NameFilePair> filePairs = param == null ? null : param.getFileParams();
if (filePairs != null && filePairs.Count > 0)
{
NameFilePair filePair;
string pairStr;
string fileName;
string contentType;
byte[] buffer = new byte[1024 * 100];
int bytesRead = 0;
for (int i = 0; i < filePairs.Count; i++)
{
//写分割线
stream.Write(boundaryBytes, 0, boundaryBytes.Length);
//写文件属性
filePair = filePairs[i];
fileName = string.IsNullOrEmpty(filePair.FileName) ? new FileInfo(filePair.FilePath).Name : filePair.FileName;
contentType = string.IsNullOrEmpty(filePair.ContentType) ? "application/octet-stream" : filePair.ContentType;
pairStr = string.Format("Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\nContent-Type: {2}\r\n\r\n", filePair.Name, fileName, contentType);
bytes = Encoding.UTF8.GetBytes(pairStr);
stream.Write(bytes, 0, bytes.Length);
//写文件数据
using (FileStream fileStream = new FileStream(filePair.FilePath, FileMode.Open, FileAccess.Read))
{
while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
{
stream.Write(buffer, 0, bytesRead);
}
}
}
}
// 6.写结束分界线
bytes = Encoding.UTF8.GetBytes(string.Format("\r\n--{0}--\r\n", boundary));
stream.Write(bytes, 0, bytes.Length);
//7.关闭请求流
stream.Close();
}
