/// <summary>
/// 执行带文件上传的HTTP POST请求。
/// </summary>
/// <param name="url">请求地址</param>
/// <param name="textParams">请求文本参数</param>
/// <param name="fileParams">请求文件参数</param>
/// <param name="headerParams">请求头部参数</param>
/// <returns>HTTP响应</returns>
public string DoPost(string url, IDictionary <string, string> textParams, IDictionary <string, FileItem> fileParams, IDictionary <string, string> headerParams)
{
// 如果没有文件参数，则走普通POST请求
if (fileParams == null || fileParams.Count == 0)
{
return(DoPost(url, textParams, headerParams));
}
string boundary = DateTime.Now.Ticks.ToString("X"); // 随机分隔线
HttpWebRequest req = GetWebRequest(url, "POST", headerParams);
req.ContentType = "multipart/form-data;charset=utf-8;boundary=" + boundary;
System.IO.Stream reqStream = req.GetRequestStream();
byte[] itemBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "\r\n");
byte[] endBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n");
if (textParams != null)
{
// 组装文本请求参数
string textTemplate = "Content-Disposition:form-data;name=\"{0}\"\r\nContent-Type:text/plain\r\n\r\n{1}";
foreach (KeyValuePair <string, string> kv in textParams)
{
string textEntry = string.Format(textTemplate, kv.Key, kv.Value);
byte[] itemBytes = Encoding.UTF8.GetBytes(textEntry);
reqStream.Write(itemBoundaryBytes, 0, itemBoundaryBytes.Length);
reqStream.Write(itemBytes, 0, itemBytes.Length);
}
}
// 组装文件请求参数
string fileTemplate = "Content-Disposition:form-data;name=\"{0}\";filename=\"{1}\"\r\nContent-Type:{2}\r\n\r\n";
foreach (KeyValuePair <string, FileItem> kv in fileParams)
{
string key = kv.Key;
FileItem fileItem = kv.Value;
if (!fileItem.IsValid())
{
throw new ArgumentException("FileItem is invalid");
}
string fileEntry = string.Format(fileTemplate, key, fileItem.GetFileName(), fileItem.GetMimeType());
byte[] itemBytes = Encoding.UTF8.GetBytes(fileEntry);
reqStream.Write(itemBoundaryBytes, 0, itemBoundaryBytes.Length);
reqStream.Write(itemBytes, 0, itemBytes.Length);
fileItem.Write(reqStream);
}
reqStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);
reqStream.Close();
HttpWebResponse rsp = (HttpWebResponse)req.GetResponse();
Encoding encoding = GetResponseEncoding(rsp);
return(GetResponseAsString(rsp, encoding));
}
/// <summary>
/// 执行带文件上传的HTTP POST请求。
/// </summary>
/// <param name="url">请求地址</param>
/// <param name="textParams">请求文本参数</param>
/// <param name="fileParams">请求文件参数</param>
/// <returns>HTTP响应</returns>
public static string DoPost(string url, IDictionary <string, string> textParams, IDictionary <string, FileItem> fileParams)
{
// 如果没有文件参数，则走普通POST请求
if (fileParams == null || fileParams.Count == 0)
{
return(DoPost(url, textParams));
}
string boundary = DateTime.Now.Ticks.ToString("X"); // 随机分隔线
HttpWebRequest req = (HttpWebRequest)WebRequest.Create(url);
req.Method = "POST";
req.KeepAlive = true;
req.UserAgent = "Top4Net";
req.ContentType = "multipart/form-data;charset=utf-8;boundary=" + boundary;
Stream reqStream = req.GetRequestStream();
byte[] itemBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "\r\n");
byte[] endBoundaryBytes = Encoding.UTF8.GetBytes("\r\n--" + boundary + "--\r\n");
// 组装文本请求参数
string textTemplate = "Content-Disposition:form-data;name=\"{0}\"\r\nContent-Type:text/plain\r\n\r\n{1}";
IEnumerator <KeyValuePair <string, string> > textEnum = textParams.GetEnumerator();
while (textEnum.MoveNext())
{
string textEntry = string.Format(textTemplate, textEnum.Current.Key, textEnum.Current.Value);
byte[] itemBytes = Encoding.UTF8.GetBytes(textEntry);
reqStream.Write(itemBoundaryBytes, 0, itemBoundaryBytes.Length);
reqStream.Write(itemBytes, 0, itemBytes.Length);
}
// 组装文件请求参数
string fileTemplate = "Content-Disposition:form-data;name=\"{0}\";filename=\"{1}\"\r\nContent-Type:{2}\r\n\r\n";
IEnumerator <KeyValuePair <string, FileItem> > fileEnum = fileParams.GetEnumerator();
while (fileEnum.MoveNext())
{
string key = fileEnum.Current.Key;
FileItem fileItem = fileEnum.Current.Value;
string fileEntry = string.Format(fileTemplate, key, fileItem.GetFileName(), fileItem.GetMimeType());
byte[] itemBytes = Encoding.UTF8.GetBytes(fileEntry);
reqStream.Write(itemBoundaryBytes, 0, itemBoundaryBytes.Length);
reqStream.Write(itemBytes, 0, itemBytes.Length);
byte[] fileBytes = fileItem.GetContent();
reqStream.Write(fileBytes, 0, fileBytes.Length);
}
reqStream.Write(endBoundaryBytes, 0, endBoundaryBytes.Length);
reqStream.Close();
HttpWebResponse rsp = (HttpWebResponse)req.GetResponse();
Encoding encoding = Encoding.GetEncoding(rsp.CharacterSet);
return(GetResponseAsString(rsp, encoding));
}
