/// <summary>
/// 解析文件表单数据
/// </summary>
/// <param name="request"></param>
/// <param name="body"></param>
private static void AnalyzeFormDataBody(this HttpRequest request, string body, int from, int to, byte[] reqData)
{
try
{
var boundary = request.Headers["Content-Type"].Split(';')[1].Trim().Split('=')[1];
var files = new List <HttpRequestFile>();
var splitWord = $"--{boundary}";
foreach (var item in body.Split(new String[] { splitWord }, StringSplitOptions.None))
{
if (string.IsNullOrEmpty(item) || string.IsNullOrWhiteSpace(item))
{
from = from + item.Length;
continue;
}
from += splitWord.Length;
if (item.Trim() == "--")
{
break;
}
var fileInfo = new HttpRequestFile();
var splitIndex = item.IndexOf("\r\n\r\n");
var formHeader = GetEncodedStr(from, from + splitIndex, reqData, Encoding.UTF8);// item.Substring(0, splitIndex);
fileInfo.AnalyzeFormHeader(formHeader);
var formbody = item.Substring(splitIndex + 4, item.Length - splitIndex - 6);
from += splitIndex + 4;
to = from + formbody.Length;
//有文件名的才当作文件看待
if (!string.IsNullOrEmpty(fileInfo.Filename))
{
fileInfo.AnalyzeFormBody(from, to, reqData);
files.Add(fileInfo);
}
else
{
body = GetEncodedStr(from, to, reqData, Encoding.UTF8);
request.Form.Add(fileInfo.Name, formbody);
}
from = to + 2;
}
request.Files = files;
}
catch (Exception)
{
}
}
/// <summary>
/// 解析表单内容
/// </summary>
/// <param name="fileInfo"></param>
/// <param name="formBody"></param>
private static void AnalyzeFormBody(this HttpRequestFile fileInfo, int from, int to, byte[] reqData)
{
try
{
var buffer = reqData.Skip(from).Take(to - from).ToArray();
var fstream = new MemoryStream();
fstream.Write(buffer, 0, buffer.Length);
fstream.Flush();
fstream.Position = 0;
fileInfo.FileStream = fstream;
}
catch (Exception)
{
}
}
/// <summary>
/// 处理文件头部
/// </summary>
/// <param name="request"></param>
/// <param name="formHeader"></param>
private static void AnalyzeFormHeader(this HttpRequestFile fileInfo, string formHeader)
{
try
{
var lines = formHeader.Split(new String[] { "\r\n" }, StringSplitOptions.None);
foreach (var line in lines)
{
if (string.IsNullOrEmpty(line))
{
continue;
}
var lineInfo = line.Split(':');
if (lineInfo[0] == "Content-Disposition")
{
foreach (var item in lineInfo[1].Split(';'))
{
var itemInfo = item.Split('=');
if (itemInfo[0].Trim().Equals("name"))
{
fileInfo.Name = item.Split('=')[itemInfo.Length - 1].Trim('"');
}
if (itemInfo[0].Trim().Equals("filename"))
{
fileInfo.Filename = item.Split('=')[itemInfo.Length - 1].Trim('"');
}
}
}
else if (lineInfo[0] == "Content-Type")
{
fileInfo.ContentType = lineInfo[1].Trim();
}
}
}
catch (Exception)
{
}
}
