/// <summary>
/// Parses a query string.
/// </summary>
/// <param name="queryString">Query string (URI encoded)</param>
/// <param name="contentEncoding">Content encoding</param>
/// <returns>A <see cref="HttpInput"/> object if successful; otherwise <see cref="HttpInput.Empty"/></returns>
/// <exception cref="ArgumentNullException"><c>queryString</c> is <c>null</c>.</exception>
/// <exception cref="FormatException">If string cannot be parsed.</exception>
public static HttpInput ParseQueryString(string queryString, Encoding contentEncoding)
{
if (queryString == null)
throw new ArgumentNullException("queryString");
if (queryString == string.Empty)
return HttpInput.Empty;
HttpInput input = new HttpInput("QueryString");
queryString = queryString.TrimStart('?', '&');
// a simple value.
/*
if (queryString.IndexOf("&") == -1 && !queryString.Contains("%3d") && !queryString.Contains("%3D") && !queryString.Contains("="))
{
input.Add(string.Empty, queryString);
return input;
}*/
if (queryString.IndexOf("&") == -1 && !queryString.Contains("="))
{
input.Add(string.Empty, queryString);
return input;
}
int state = 0;
int startpos = 0;
string name = null;
for (int i = 0; i < queryString.Length; ++i)
{
int newIndexPos;
if (state == 0 && IsEqual(queryString, ref i, out newIndexPos))
{
name = queryString.Substring(startpos, i - startpos);
i = newIndexPos;
startpos = i + 1;
++state;
}
else if (state == 1 && IsAmp(queryString, ref i, out newIndexPos))
{
Add(input, name, queryString.Substring(startpos, i - startpos), contentEncoding);
i = newIndexPos;
startpos = i + 1;
state = 0;
name = null;
}
}
if (state == 0 && !input.GetEnumerator().MoveNext())
throw new FormatException("Not a valid query string: " + queryString);
if (startpos <= queryString.Length)
{
if (name != null)
Add(input, name, queryString.Substring(startpos, queryString.Length - startpos), contentEncoding);
else
Add(input, string.Empty, queryString.Substring(startpos, queryString.Length - startpos), contentEncoding);
}
return input;
}
/// <summary>
/// Parses a querystring.
/// </summary>
/// <param name="queryString">Querystring (url decoded)</param>
/// <returns>A HttpInput object if successful; otherwise HttpInput.Empty</returns>
public static HttpInput ParseQueryString(string queryString)
{
if (queryString == null)
throw new ArgumentNullException("queryString");
if (queryString == String.Empty)
return HttpInput.Empty;
int state = 0;
int startpos = 0;
string name = null;
HttpInput input = new HttpInput("QueryString");
for (int i = 0; i < queryString.Length; ++i)
{
int newIndexPos;
if (state == 0 && IsEqual(queryString, ref i, out newIndexPos))
{
name = queryString.Substring(startpos, i - startpos);
i = newIndexPos;
startpos = i + 1;
++state;
}
else if (state == 1 && IsAmp(queryString, ref i, out newIndexPos))
{
Add(input, name, queryString.Substring(startpos, i - startpos));
i = newIndexPos;
startpos = i + 1;
state = 0;
name = null;
}
}
if (state == 0 && !input.GetEnumerator().MoveNext())
Add(input, queryString, String.Empty);
else if (name != null && startpos <= queryString.Length)
Add(input, name, queryString.Substring(startpos, queryString.Length - startpos));
return input;
}
public void TestNoQueryValues()
{
HttpInput result = HttpHelper.ParseQueryString("");
Assert.False(result.GetEnumerator().MoveNext());
}
