/// <summary>
/// Constructor
/// </summary>
internal HttpContext(HttpRequest request, HttpServerUtility server)
{
this.Request = request;
this.Response = new HttpResponse();
this.Server = server;
}
/// <summary>
/// Execute parsing of a request
/// </summary>
/// <param name="requestSocket">Socket bind to request for parsing</param>
internal static HttpRequest Parse(Socket requestSocket)
{
byte[] buffer = new byte[BUFFER_REQUEST_SIZE];
// TODO : evaluate use Poll for receiving alla bytes
int bytesRead = 0;
do
{
//int bytesRead = requestSocket.Receive(buffer);
bytesRead += requestSocket.Receive(buffer, bytesRead, BUFFER_REQUEST_SIZE - bytesRead, SocketFlags.None);
} while (requestSocket.Available > 0);
// TODO : evaluate elaboration on bytes and not get all string result
string request = new String(Encoding.UTF8.GetChars(buffer));
HttpRequest httpRequest = new HttpRequest();
// split request lines on line feed
string[] lines = request.Split(LF);
int i = 0;
// trim request line on carriage return
lines[i] = lines[i].TrimEnd(CR);
// process request line (method, url, protocol version)
string[] requestLineTokens = lines[i].Split(REQUEST_LINE_SEPARATOR);
// method
httpRequest.HttpMethod = requestLineTokens[0];
// url, find start of query string (if exists)
int idxQueryString = requestLineTokens[1].IndexOf(QUERY_STRING_SEPARATOR);
httpRequest.URL = (idxQueryString != -1) ?
requestLineTokens[1].Substring(0, idxQueryString).Trim('/') : requestLineTokens[1].Trim('/');
// protocol
httpRequest.HttpProtocol = requestLineTokens[2];
// parsing query string
if (idxQueryString != -1)
{
string queryString = requestLineTokens[1].Substring(idxQueryString + 1);
if (queryString != String.Empty)
{
string[] queryStringParams = queryString.Split(QUERY_STRING_PARAMS_SEPARATOR);
foreach (string queryStringParam in queryStringParams)
{
string[] queryStringParamTokens = queryStringParam.Split(QUERY_STRING_VALUE_SEPARATOR);
string queryStringParamValue = null;
// if there is key-value pair
if (queryStringParamTokens.Length == 2)
{
queryStringParamValue = queryStringParamTokens[1];
}
httpRequest.QueryString.Add(queryStringParamTokens[0], HttpServerUtility.HtmlDecode(queryStringParamValue));
}
}
}
// next line (header start)
i++;
// trim end carriage return of each line
lines[i] = lines[i].TrimEnd(CR);
// headers end with empty string
while (lines[i] != String.Empty)
{
int separatorIndex = lines[i].IndexOf(HEADER_VALUE_SEPARATOR);
if (separatorIndex != -1)
{
httpRequest.Headers.Add(lines[i].Substring(0, separatorIndex), lines[i].Substring(separatorIndex + 1).Trim());
}
i++;
// trim end carriage return of each line
lines[i] = lines[i].TrimEnd(CR);
}
// next line (body start)
i++;
// content length specified
if (httpRequest.Headers.ContainsKey("Content-Length"))
{
httpRequest.Body = lines[i].TrimEnd(CR).Substring(0, Convert.ToInt32(httpRequest.Headers["Content-Length"].ToString()));
}
// fill form parameters collection
if ((httpRequest.Headers["Content-Type"] != null) &&
(httpRequest.Headers["Content-Type"].StartsWith("application/x-www-form-urlencoded")))
{
string[] formParams = httpRequest.Body.Split(FORM_PARAMS_SEPARATOR);
foreach (string formParam in formParams)
{
string[] formParamTokens = formParam.Split(FORM_VALUE_SEPARATOR);
string formParamValue = null;
// if there is key-value pair
if (formParamTokens.Length == 2)
{
formParamValue = formParamTokens[1];
}
httpRequest.Form.Add(formParamTokens[0], HttpServerUtility.HtmlDecode(formParamValue));
}
}
return(httpRequest);
}