/// <summary>
/// 验证上传文件的最大字节长度。
/// </summary>
/// <param name="name">参数名</param>
/// <param name="value">参数值</param>
/// <param name="maxLength">最大长度</param>
public static void ValidateMaxLength(String name, FileItem value, int maxLength)
{
if (value != null && value.GetContent() != null && value.GetContent().Length > maxLength)
{
throw new JdException(ERR_CODE_PARAM_INVALID, String.Format(ERR_MSG_PARAM_INVALID, name));
}
}
/// <summary>
/// 验证上传文件的最大字节长度。
/// </summary>
/// <param name="name">参数名</param>
/// <param name="value">参数值</param>
/// <param name="maxLength">最大长度</param>
public static void ValidateMaxLength(String name, FileItem value, int maxLength)
{
if (value != null && value.GetContent() != null && value.GetContent().Length > maxLength)
{
throw new JdException(ERR_CODE_PARAM_INVALID, String.Format(ERR_MSG_PARAM_INVALID, name));
}
}
/// <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 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 = GetWebRequest(url, "POST");
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));
}
