/// <summary>
/// Get form collection with values from query
/// </summary>
/// <returns></returns>
public FormCollection GetFormCollection()
{
if (HttpContext.Request.Method == HTTPMethod.Get)
{
return new FormCollection(HttpContext.Request.Uri.QueryString);
}
else if (HttpContext.Request.Method == HTTPMethod.Post)
{
var socket = HttpContext.Socket;
var buffer = new byte[2048];
var formCollection = new FormCollection(HttpContext.Request.Uri.QueryString);
while (socket.Available > 0)
{
socket.ReceiveUntil(buffer, "&");
var keyValuePair = new String(Encoding.UTF8.GetChars(buffer)).Split('=');
formCollection.AddValue(keyValuePair[0], keyValuePair[1]);
}
return formCollection;
}
throw new NotSupportedException("Only GET and POST is supported");
}
//private const int _PostRxBufferSize = 1500;
public FormCollection RecieveFiles()
{
var request = HttpContext.Request;
if (request.Method == HTTPMethod.Post &&
request.ContentType.MainContentType == EnumMainContentType.MultiPart &&
request.ContentType.SubContentType == EnumSubContentType.FormData)
{
var contentLengthFromHeader = int.Parse(request.Headers["Content-Length"].ToString());
var contentLengthReceived = 0;
var PostedData = new FormCollection();
var socket = HttpContext.Socket;
var allDataRecieved = false;
var receivedByteCount = 0;
var buffer = new byte[2048]; //The size of this array essentially sets the read rate...
var fileDirectoryPath = SDCardManager.GetWorkingDirectoryPath();
var boundaryBytes = Encoding.UTF8.GetBytes(request.Boundary);
var BeginningboundaryBytes = Encoding.UTF8.GetBytes("\r\n-----");
var strBldrBoundaryHeader = new StringBuilder();
var strBldrBoundaryData = new StringBuilder();
StringBuilder strBldr = new StringBuilder();
var BoundaryDataSeparator = Encoding.UTF8.GetBytes("\r\n\r\n"); //a double newline delimits Boundary Headers from Boundary Data...
var BoundaryDataIndex = 0;
Regex rx = new Regex("([^=\\s]+)=\"([^\"]*)\""); //matches key value pairs like the below...
//var Value = "key1=\"value1\" key2=\"value 2\" key3=\"value3\" key4=\"value4\" key5=\"5555\" key6=\"xxx666\"";
Debug.Print("Boundary is: " + request.Boundary); //The Boundary property will be populated if it is multipart/form-data
Debug.Print("Reading Bytes...");
socket.ReceiveUntil(buffer, boundaryBytes, out receivedByteCount, true); //Discard the first Boundary Read...
while (!allDataRecieved)
{
contentLengthReceived += receivedByteCount;
Debug.Print("Bytes Read: " + receivedByteCount +
"\r\nTotal Bytes Read: " + contentLengthReceived +
"\r\nTotal Bytes To Read: " + contentLengthFromHeader);
if (contentLengthReceived < contentLengthFromHeader)
{
Debug.Print("Reading Bytes...");
socket.ReceiveUntil(buffer, boundaryBytes, out receivedByteCount, true);
BoundaryDataIndex = buffer.IndexOf(BoundaryDataSeparator);
//Debug.Print("Boundary Data Index: " + BoundaryDataIndex);
/*The end of the multipart form is denoted by the boundary data followed by -- and a Carriage Return Line Feed (ex -----------------------------42291685921978--)
* Since I read until the the Boundary Data, I loop until only those characters are found; I do a check for null bytes just to make sure.*/
if (buffer.IndexOf(Encoding.UTF8.GetBytes("--\r\n")) == 0 && buffer[5] == default(byte))
{
Debug.Print("You've reached the end of the multipart form! ");
continue;
}
strBldrBoundaryHeader.Clear();
strBldrBoundaryHeader.Append(Encoding.UTF8.GetChars(buffer.SubArray(0, BoundaryDataIndex + 1)));
//Debug.Print("Boundary Header: \r\n" + strBldrBoundaryHeader.ToString().ToString().Trim());
var objBoundaryHeaderCollection = new BoundaryHeaderCollection(strBldrBoundaryHeader.ToString());
strBldr.Clear();
strBldr.Append(objBoundaryHeaderCollection["Content-Disposition".ToLower()]); //I store all keys in lowercase...
//Debug.Print("Content-Disposition Value: " + strBldr);
var KeyValuePairs = new Hashtable();
foreach (Match m in rx.Matches(strBldr.ToString()))
{
Debug.Print("Found KeyValue Pair:" +
"\r\n\tKey: " + m.Groups[1] +
"\r\n\tValue: " + m.Groups[2]);
KeyValuePairs.Add(m.Groups[1].ToString().ToLower(), m.Groups[2]);
}
if (objBoundaryHeaderCollection.Contains("Content-Type".ToLower()))//write Boundary Data to File...
{
strBldr.Clear();//Get the value portion of the Content-Type Boundary Header
strBldr.Append(objBoundaryHeaderCollection["Content-Type".ToLower()]); //I store all keys in lowercase...
Debug.Print("I've got a file and the Content-Type is: " + strBldr.ToString());
//Get the file's name from the KeyValuePairs...
string fileName = string.Empty;
if (KeyValuePairs.Contains("filename")) //JQuery ajax post (from <input type="file">) sends filename parameter containing file's name; the name property is left as defined in the html.
fileName = KeyValuePairs["filename"].ToString();
else if (KeyValuePairs.Contains("name")) //Form Post sends name parameter containing file's name (no filename parameter is sent)
fileName = KeyValuePairs["name"].ToString();
else
fileName = "Unknown.txt";
Debug.Print("File name is set to: " + fileName);
if (buffer.IndexOf(boundaryBytes) == -1) //Write to file, loop to get remaining file data
{
var BoundaryData = buffer.SubArray(BoundaryDataIndex + BoundaryDataSeparator.Length, receivedByteCount - BoundaryDataIndex - BoundaryDataSeparator.Length);
var intTemp = receivedByteCount;
SDCardManager.Write(fileDirectoryPath, fileName, System.IO.FileMode.Create, BoundaryData, BoundaryData.Length);
while (buffer.IndexOf(boundaryBytes) == -1) //boundary hasn't been reached, get more data...
{
Debug.Print("Getting more File data...");
socket.ReceiveUntil(buffer, boundaryBytes, out receivedByteCount, true);
if (buffer.IndexOf(boundaryBytes) != -1)//remove boundary string here before you have written to a file...
{
var intBeginningBoundaryBytesIndex = buffer.IndexOf(BeginningboundaryBytes);
var Data = buffer.SubArray(0, intBeginningBoundaryBytesIndex);
SDCardManager.Write(fileDirectoryPath, fileName, System.IO.FileMode.Append, Data, Data.Length);
}
else
SDCardManager.Write(fileDirectoryPath, fileName, System.IO.FileMode.Append, buffer, receivedByteCount);
intTemp += receivedByteCount;
Debug.Print("Iterated a loop and Recieved: " + receivedByteCount + " Bytes...");
}
receivedByteCount = intTemp;
}
else //remove boundary string, write to file and exit...
{
var BoundaryData = buffer.SubArray(BoundaryDataIndex + BoundaryDataSeparator.Length, receivedByteCount - BoundaryDataIndex - BoundaryDataSeparator.Length + 1);
var intBeginningBoundaryBytesIndex = BoundaryData.IndexOf(BeginningboundaryBytes);
var Data = BoundaryData.SubArray(0, intBeginningBoundaryBytesIndex);
SDCardManager.Write(fileDirectoryPath, fileName, System.IO.FileMode.Append, Data, Data.Length);
}
}
else //add the 'name' value and BoundaryData to the PostedData FormCollection object...
{
strBldrBoundaryData.Clear();
strBldrBoundaryData.Append(Encoding.UTF8.GetChars(buffer.SubArray(BoundaryDataIndex + BoundaryDataSeparator.Length, buffer.Length - BoundaryDataIndex - BoundaryDataSeparator.Length)));
//Debug.Print("Boundary Data: \r\n" + strBldrBoundaryData.ToString());
var strBoundaryData = strBldrBoundaryData.ToString();
if (KeyValuePairs.Contains("name"))
PostedData.AddValue(KeyValuePairs["name"].ToString(), strBoundaryData.Substring(0, strBoundaryData.IndexOf('\n')));
Debug.Print("Added Key/Value Pair to PostedData FormCollection...");
}
//var data = socket.GetMoreBytes(2048, out receivedByteCount);
//SDCardManager.Write(fileDirectoryPath, "Test.txt", System.IO.FileMode.Append, data, receivedByteCount);
}
else
allDataRecieved = true;
}
return PostedData;
}
throw new NotSupportedException("Only POST is supported");
}
