/// 模擬HTTP表單提交參數並附帶附件
/// </summary>
/// <param name="fileName">文件完整路徑或相對路徑</param>
/// <param name="url">HTTP鏈接地址</param>
/// <param name="keys">參數名稱</param>
/// <param name="values">參數值</param>
/// <returns>請求返回值</returns>
public static string SubmitData(string fileName, string url, string[] keys, string[] values)
{
string boundary = "----------" + DateTime.Now.Ticks.ToString("x");
HttpWebRequest httpWebRequest = (HttpWebRequest)WebRequest.Create(url);
httpWebRequest.ContentType = "multipart/form-data; boundary=" + boundary;
httpWebRequest.Method = "POST";
StringBuilder sb = new StringBuilder();
if (keys != null)
{
for (int i = 0; i < keys.Length; i++)
{
sb.Append("--");
sb.Append(boundary);
sb.Append("\r\n");
sb.Append("Content-Disposition: form-data; name=\"" + keys[i] + "\"\r\n\r\n");
sb.Append(values[i]);
sb.Append("\r\n");
}
}
sb.Append("--");
sb.Append(boundary);
sb.Append("\r\n");
sb.Append("Content-Disposition: form-data; name=\"NUM_FILE\"; filename=\"");
sb.Append(Path.GetFileName(fileName));
sb.Append("\"");
sb.Append("\r\n");
sb.Append("Content-Type: application/octet-stream");
sb.Append("\r\n");
sb.Append("\r\n");
string postHeader = sb.ToString();
byte[] postHeaderBytes = Encoding.UTF8.GetBytes(postHeader);
byte[] boundaryBytes = Encoding.ASCII.GetBytes("\r\n--" + boundary + "\r\n");
FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read);
long length = postHeaderBytes.Length + fileStream.Length + boundaryBytes.Length;
httpWebRequest.ContentLength = length;
Stream requestStream = httpWebRequest.GetRequestStream();
requestStream.Write(postHeaderBytes, 0, postHeaderBytes.Length);
byte[] buffer = new Byte[checked((uint)Math.Min(4096, (int)fileStream.Length))];
int bytesRead = 0;
while ((bytesRead = fileStream.Read(buffer, 0, buffer.Length)) != 0)
requestStream.Write(buffer, 0, bytesRead);
requestStream.Write(boundaryBytes, 0, boundaryBytes.Length);
HttpWebResponse webResponse = (HttpWebResponse)httpWebRequest.GetResponse();
string returnValue = "";
using (StreamReader reader = new StreamReader(webResponse.GetResponseStream(), Encoding.GetEncoding("GB2312")))
{
returnValue = reader.ReadToEnd();
}
webResponse.Close();
requestStream.Close();
fileStream.Close();
return returnValue;
}
C# 模擬HTTP表單提交參數並附帶附件
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