/// <summary>
/// 同步方式发起http post请求，可以同时上传文件
/// </summary>
/// <param name="url">请求URL</param>
/// <param name="paras">请求参数列表</param>
/// <param name="files">上传文件列表</param>
/// <returns>请求返回值</returns>
public string HttpPostWithFile(string url, List <APIParameter> paras, List <APIParameter> files)
{
string querystring = HttpUtil.GetQueryFromParas(paras);
return(HttpPostWithFile(url, querystring, files));
}
/// <summary>
/// 同步方式发起http post请求
/// </summary>
/// <param name="url">请求URL</param>
/// <param name="paras">请求参数列表</param>
/// <returns>请求返回值</returns>
public string HttpPost(string url, List <APIParameter> paras)
{
string querystring = HttpUtil.GetQueryFromParas(paras);
return(HttpPost(url, querystring));
}
/// <summary>
/// 同步方式发起http post请求，可以同时上传文件
/// </summary>
/// <param name="url">请求URL</param>
/// <param name="queryString">请求参数字符串</param>
/// <param name="files">上传文件列表</param>
/// <returns>请求返回值</returns>
public string HttpPostWithFile(string url, string queryString, List <APIParameter> files)
{
Stream requestStream = null;
StreamReader responseReader = null;
string responseData = null;
string boundary = DateTime.Now.Ticks.ToString("x");
HttpWebRequest webRequest = WebRequest.Create(url) as HttpWebRequest;
webRequest.ServicePoint.Expect100Continue = false;
webRequest.Timeout = 20000;
webRequest.ContentType = "multipart/form-data; boundary=" + boundary;
webRequest.Method = "POST";
webRequest.KeepAlive = true;
webRequest.Credentials = CredentialCache.DefaultCredentials;
Stream responseStream = null;
try
{
Stream memStream = new MemoryStream();
byte[] boundarybytes = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");
string formdataTemplate = "\r\n--" + boundary + "\r\nContent-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}";
List <APIParameter> listParams = HttpUtil.GetQueryParameters(queryString);
foreach (APIParameter param in listParams)
{
string formitem = string.Format(formdataTemplate, param.Name, param.Value);
byte[] formitembytes = Encoding.UTF8.GetBytes(formitem);
memStream.Write(formitembytes, 0, formitembytes.Length);
}
memStream.Write(boundarybytes, 0, boundarybytes.Length);
string headerTemplate = "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\nContent-Type: \"{2}\"\r\n\r\n";
foreach (APIParameter param in files)
{
string name = param.Name;
string filePath = param.Value;
string file = Path.GetFileName(filePath);
string contentType = HttpUtil.GetContentType(file);
string header = string.Format(headerTemplate, name, file, contentType);
byte[] headerbytes = System.Text.Encoding.UTF8.GetBytes(header);
memStream.Write(headerbytes, 0, headerbytes.Length);
FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read);
byte[] buffer = new byte[1024];
int bytesRead = 0;
while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
{
memStream.Write(buffer, 0, bytesRead);
}
memStream.Write(boundarybytes, 0, boundarybytes.Length);
fileStream.Close();
}
webRequest.ContentLength = memStream.Length;
requestStream = webRequest.GetRequestStream();
memStream.Position = 0;
byte[] tempBuffer = new byte[memStream.Length];
memStream.Read(tempBuffer, 0, tempBuffer.Length);
memStream.Close();
requestStream.Write(tempBuffer, 0, tempBuffer.Length);
requestStream.Close();
requestStream = null;
responseStream = webRequest.GetResponse().GetResponseStream();
responseReader = new StreamReader(responseStream);
responseData = responseReader.ReadToEnd();
}
catch
{
throw;
}
finally
{
if (requestStream != null)
{
requestStream.Close();
requestStream = null;
}
if (responseStream != null)
{
responseStream.Close();
responseStream = null;
}
if (responseReader != null)
{
responseReader.Close();
responseReader = null;
}
webRequest = null;
}
return(responseData);
}
//异步方式发起http post请求，可以同时上传文件
public bool HttpPostWithFile(string url, string queryString, List <APIParameter> files, AsyncHttpCallback callback)
{
Stream requestStream = null;
string boundary = DateTime.Now.Ticks.ToString("x");
url += '?' + queryString;
HttpWebRequest webRequest = WebRequest.Create(url) as HttpWebRequest;
webRequest.ServicePoint.Expect100Continue = true;
webRequest.ContentType = "multipart/form-data; boundary=" + boundary;
webRequest.Method = "POST";
webRequest.KeepAlive = true;
webRequest.Credentials = CredentialCache.DefaultCredentials;
try
{
Stream memStream = new MemoryStream();
byte[] boundarybytes = System.Text.Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");
string formdataTemplate = "\r\n--" + boundary + "\r\nContent-Disposition: form-data; name=\"{0}\"\r\n\r\n{1}";
List <APIParameter> listParams = HttpUtil.GetQueryParameters(queryString);
foreach (APIParameter param in listParams)
{
//需要将
string formitem = string.Format(formdataTemplate, param.Name, (FormParamDecode(param.Value)));
byte[] formitembytes = Encoding.UTF8.GetBytes(formitem);
memStream.Write(formitembytes, 0, formitembytes.Length);
}
memStream.Write(boundarybytes, 0, boundarybytes.Length);
string headerTemplate = "Content-Disposition: form-data; name=\"{0}\"; filename=\"{1}\"\r\nContent-Type: \"{2}\"\r\n\r\n";
foreach (APIParameter param in files)
{
string name = param.Name;
string filePath = param.Value;
string file = Path.GetFileName(filePath);
string contentType = HttpUtil.GetContentType(file);
string header = string.Format(headerTemplate, name, file, contentType);
byte[] headerbytes = System.Text.Encoding.UTF8.GetBytes(header);
memStream.Write(headerbytes, 0, headerbytes.Length);
FileStream fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read);
byte[] buffer = new byte[1024];
int bytesRead = 0;
while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
{
memStream.Write(buffer, 0, bytesRead);
}
memStream.Write(boundarybytes, 0, boundarybytes.Length);
fileStream.Close();
}
webRequest.ContentLength = memStream.Length;
requestStream = webRequest.GetRequestStream();
memStream.Position = 0;
byte[] tempBuffer = new byte[memStream.Length];
memStream.Read(tempBuffer, 0, tempBuffer.Length);
memStream.Close();
requestStream.Write(tempBuffer, 0, tempBuffer.Length);
requestStream.Close();
requestStream = null;
RequestState state = new RequestState();
state.cb = callback;
state.request = webRequest;
IAsyncResult result = (IAsyncResult)webRequest.BeginGetResponse(new AsyncCallback(ResponseCallback), state);
ThreadPool.RegisterWaitForSingleObject(result.AsyncWaitHandle, new WaitOrTimerCallback(TimeoutCallback),
webRequest, DefaultTimeout, true);
allDone.WaitOne();
state.response.Close();
}
catch
{
return(false);
}
finally
{
if (requestStream != null)
{
requestStream.Close();
requestStream = null;
}
}
return(true);
}
