public static async Task <FormData> FromRequest(HttpRequest request)
{
try
{
FormData data = new FormData();
data.remoteIP = request.HttpContext.Connection.RemoteIpAddress.ToString();
foreach (var kv in request.Query)
{
data.mapParams[kv.Key] = kv.Value[0];
}
if (request.Method.ToUpper() == "POST")
{
if (request.ContentType == null)
{
return(data);
}
else if (request.ContentType == "application/x-www-form-urlencoded")
{
byte[] allfile = null;
int seek = 0;
var clen = request.Headers["Content-Length"];
if (StringValues.IsNullOrEmpty(clen))
{
int leng = int.Parse(clen);
allfile = new byte[leng];
while (request.Body.CanRead)
{
int read = await request.Body.ReadAsync(allfile, seek, leng - seek);
seek += read;
if (read == 0)
{
break;
}
}
}
else
{
allfile = new byte[4 * 1024 * 1024];
while (request.Body.CanRead)
{
int read = await request.Body.ReadAsync(allfile, seek, 1024);
seek += read;
if (read == 0)
{
break;
}
}
}
string text = System.Text.Encoding.UTF8.GetString(allfile, 0, seek);
var infos = text.Split(new char[] { '=', '&' });
for (var i = 0; i < infos.Length / 2; i++)
{
data.mapParams[infos[i * 2]] = Uri.UnescapeDataString(infos[i * 2 + 1]);
}
}
else if (request.ContentType.IndexOf("multipart/form-data;") == 0)
{
byte[] allfile = null;
int seek = 0;
var clen = request.Headers["Content-Length"];
if (StringValues.IsNullOrEmpty(clen))
{
int leng = int.Parse(clen);
allfile = new byte[leng];
while (request.Body.CanRead)
{
int read = await request.Body.ReadAsync(allfile, seek, leng - seek);
seek += read;
if (read == 0)
{
break;
}
}
}
else
{
allfile = new byte[4 * 1024 * 1024];
while (request.Body.CanRead)
{
int read = await request.Body.ReadAsync(allfile, seek, 1024);
seek += read;
if (read == 0)
{
break;
}
}
}
var iSplitTag = request.ContentType.IndexOf("=") + 1;
var sSplitTag = "--" + request.ContentType.Substring(iSplitTag);
var bSplitTag = System.Text.Encoding.ASCII.GetBytes(sSplitTag);
int iTag = ByteIndexOf(allfile, seek, bSplitTag, 0);
if (iTag < 0)
{
string s = System.Text.Encoding.ASCII.GetString(allfile, 0, seek);
}
else
{
while (iTag >= 0)
{
int iTagNext = ByteIndexOf(allfile, seek, bSplitTag, iTag + 1);
if (iTagNext < 0)
{
break;
}
var bs = System.Text.Encoding.ASCII.GetBytes("\r\n\r\n");
int iStart = iTag + bSplitTag.Length + 2;
int iDataStart = ByteIndexOf(allfile, seek, bs, iStart) + 4;
string s = System.Text.Encoding.ASCII.GetString(allfile, iStart, iDataStart - iStart);
List <string> infos = new List <string>(s.Split(new string[] { "; ", ": ", "\r\n", "=" }, StringSplitOptions.None));
var i = infos.IndexOf("name");
var name = infos[i + 1].Substring(1);
name = name.Substring(0, name.Length - 1);
byte[] ddata = new byte[iTagNext - iDataStart - 2];
Array.Copy(allfile, iDataStart, ddata, 0, ddata.Length);
if (infos.Contains("application/octet-stream"))
{
data.mapFiles[name] = ddata;
}
else
{
string txtData = System.Text.Encoding.UTF8.GetString(ddata);
data.mapParams[name] = Uri.UnescapeDataString(txtData);
}
iTag = iTagNext;
}
}
}
else
{
return(null);
}
}
return(data);
}
catch
{
return(null);
}
}
