private static (string PrevHeaderValue, string NextHeaderValue) GetHeaderValues(HttpRequestHeaders headers, string prevName, string nextName, string prevValue, string nextValue)
{
headers.Reset();
var headerName = Encoding.ASCII.GetBytes(prevName).AsSpan();
var prevSpan = Encoding.UTF8.GetBytes(prevValue).AsSpan();
headers.Append(headerName, prevSpan);
headers.OnHeadersComplete();
var prevHeaderValue = ((IHeaderDictionary)headers)[prevName].ToString();
headers.Reset();
if (nextValue != null)
{
headerName = Encoding.ASCII.GetBytes(prevName).AsSpan();
var nextSpan = Encoding.UTF8.GetBytes(nextValue).AsSpan();
headers.Append(headerName, nextSpan);
}
headers.OnHeadersComplete();
var newHeaderValue = ((IHeaderDictionary)headers)[nextName].ToString();
return(prevHeaderValue, newHeaderValue);
}
public void ValueReuseLatin1NotConfusedForUtf16AndStillRejected(bool reuseValue, KnownHeader header)
{
var headers = new HttpRequestHeaders(reuseHeaderValues: reuseValue);
var headerValue = new char[127]; // 64 + 32 + 16 + 8 + 4 + 2 + 1
for (var i = 0; i < headerValue.Length; i++)
{
headerValue[i] = 'a';
}
for (var i = 0; i < headerValue.Length; i++)
{
// Set non-ascii Latin char that is valid Utf16 when widened; but not a valid utf8 -> utf16 conversion.
headerValue[i] = '\u00a3';
for (var mode = 0; mode <= 1; mode++)
{
string headerValueUtf16Latin1CrossOver;
if (mode == 0)
{
// Full length
headerValueUtf16Latin1CrossOver = new string(headerValue);
}
else
{
// Truncated length (to ensure different paths from changing lengths in matching)
headerValueUtf16Latin1CrossOver = new string(headerValue.AsSpan().Slice(0, i + 1));
}
headers.Reset();
var headerName = Encoding.ASCII.GetBytes(header.Name).AsSpan();
var prevSpan = Encoding.UTF8.GetBytes(headerValueUtf16Latin1CrossOver).AsSpan();
headers.Append(headerName, prevSpan);
headers.OnHeadersComplete();
var prevHeaderValue = ((IHeaderDictionary)headers)[header.Name].ToString();
Assert.Equal(headerValueUtf16Latin1CrossOver, prevHeaderValue);
Assert.NotSame(headerValueUtf16Latin1CrossOver, prevHeaderValue);
headers.Reset();
Assert.Throws <InvalidOperationException>(() =>
{
var headerName = Encoding.ASCII.GetBytes(header.Name).AsSpan();
var nextSpan = Encoding.Latin1.GetBytes(headerValueUtf16Latin1CrossOver).AsSpan();
Assert.False(nextSpan.SequenceEqual(Encoding.ASCII.GetBytes(headerValueUtf16Latin1CrossOver)));
headers.Append(headerName, nextSpan);
});
}
// Reset back to Ascii
headerValue[i] = 'a';
}
}
public void Latin1ValuesAcceptedInLatin1ModeButNotReused(bool reuseValue, KnownHeader header)
{
var headers = new HttpRequestHeaders(reuseHeaderValues: reuseValue, _ => Encoding.Latin1);
var headerValue = new char[127]; // 64 + 32 + 16 + 8 + 4 + 2 + 1
for (var i = 0; i < headerValue.Length; i++)
{
headerValue[i] = 'a';
}
for (var i = 0; i < headerValue.Length; i++)
{
// Set non-ascii Latin char that is valid Utf16 when widened; but not a valid utf8 -> utf16 conversion.
headerValue[i] = '\u00a3';
for (var mode = 0; mode <= 1; mode++)
{
string headerValueUtf16Latin1CrossOver;
if (mode == 0)
{
// Full length
headerValueUtf16Latin1CrossOver = new string(headerValue);
}
else
{
// Truncated length (to ensure different paths from changing lengths in matching)
headerValueUtf16Latin1CrossOver = new string(headerValue.AsSpan().Slice(0, i + 1));
}
var headerName = Encoding.ASCII.GetBytes(header.Name).AsSpan();
var latinValueSpan = Encoding.Latin1.GetBytes(headerValueUtf16Latin1CrossOver).AsSpan();
Assert.False(latinValueSpan.SequenceEqual(Encoding.ASCII.GetBytes(headerValueUtf16Latin1CrossOver)));
headers.Reset();
headers.Append(headerName, latinValueSpan);
headers.OnHeadersComplete();
var parsedHeaderValue1 = ((IHeaderDictionary)headers)[header.Name].ToString();
headers.Reset();
headers.Append(headerName, latinValueSpan);
headers.OnHeadersComplete();
var parsedHeaderValue2 = ((IHeaderDictionary)headers)[header.Name].ToString();
Assert.Equal(headerValueUtf16Latin1CrossOver, parsedHeaderValue1);
Assert.Equal(parsedHeaderValue1, parsedHeaderValue2);
Assert.NotSame(parsedHeaderValue1, parsedHeaderValue2);
}
// Reset back to Ascii
headerValue[i] = 'a';
}
}
public void EntriesCanBeEnumeratedAfterResets()
{
HttpRequestHeaders headers = new HttpRequestHeaders();
EnumerateEntries((IHeaderDictionary)headers);
headers.Reset();
EnumerateEntries((IDictionary <string, StringValues>)headers);
headers.Reset();
EnumerateEntries((IHeaderDictionary)headers);
headers.Reset();
EnumerateEntries((IDictionary <string, StringValues>)headers);
}
public void NullCharactersRejectedInUTF8AndLatin1Mode(bool useLatin1, KnownHeader header)
{
var headers = new HttpRequestHeaders(encodingSelector: useLatin1 ? _ => Encoding.Latin1 : (Func <string, Encoding>)null);
var valueArray = new char[127]; // 64 + 32 + 16 + 8 + 4 + 2 + 1
for (var i = 0; i < valueArray.Length; i++)
{
valueArray[i] = 'a';
}
for (var i = 1; i < valueArray.Length; i++)
{
// Set non-ascii Latin char that is valid Utf16 when widened; but not a valid utf8 -> utf16 conversion.
valueArray[i] = '\0';
string valueString = new string(valueArray);
headers.Reset();
Assert.Throws <InvalidOperationException>(() =>
{
var headerName = Encoding.ASCII.GetBytes(header.Name).AsSpan();
var valueSpan = Encoding.ASCII.GetBytes(valueString).AsSpan();
headers.Append(headerName, valueSpan);
});
valueArray[i] = 'a';
}
}
public void EnumeratorReusedAfterReset()
{
HttpRequestHeaders headers = new HttpRequestHeaders();
IEnumerable <KeyValuePair <string, StringValues> > enumerable = headers;
var enumerator0 = enumerable.GetEnumerator();
headers.Reset();
var enumerator1 = enumerable.GetEnumerator();
Assert.Same(enumerator0, enumerator1);
}
public void ClearPseudoRequestHeadersPlusResetClearsHeaderReferenceValue()
{
const BindingFlags privateFlags = BindingFlags.NonPublic | BindingFlags.Instance;
HttpRequestHeaders headers = new HttpRequestHeaders(reuseHeaderValues: false);
headers.HeaderMethod = "GET";
headers.ClearPseudoRequestHeaders();
headers.Reset();
// Hacky but required because header references is private.
var headerReferences = typeof(HttpRequestHeaders).GetField("_headers", privateFlags).GetValue(headers);
var methodValue = (StringValues)headerReferences.GetType().GetField("_Method").GetValue(headerReferences);
Assert.Equal(StringValues.Empty, methodValue);
}
public void MultiValueReuseEmptyAfterReset(bool reuseValue, KnownHeader header)
{
const string HeaderValue1 = "Hello1";
const string HeaderValue2 = "Hello2";
var headers = new HttpRequestHeaders(reuseHeaderValues: reuseValue);
var headerName = Encoding.ASCII.GetBytes(header.Name).AsSpan();
var prevSpan1 = Encoding.UTF8.GetBytes(HeaderValue1).AsSpan();
var prevSpan2 = Encoding.UTF8.GetBytes(HeaderValue2).AsSpan();
headers.Append(headerName, prevSpan1);
headers.Append(headerName, prevSpan2);
headers.OnHeadersComplete();
var prevHeaderValue = ((IHeaderDictionary)headers)[header.Name];
Assert.Equal(2, prevHeaderValue.Count);
Assert.NotEqual(string.Empty, prevHeaderValue.ToString());
Assert.Single(headers);
var count = headers.Count;
Assert.Equal(1, count);
headers.Reset();
// Empty after reset
var nextHeaderValue = ((IHeaderDictionary)headers)[header.Name].ToString();
Assert.NotNull(nextHeaderValue);
Assert.Equal(string.Empty, nextHeaderValue);
Assert.Empty(headers);
count = headers.Count;
Assert.Equal(0, count);
headers.OnHeadersComplete();
// Still empty after complete
nextHeaderValue = ((IHeaderDictionary)headers)[header.Name].ToString();
Assert.NotNull(nextHeaderValue);
Assert.Equal(string.Empty, nextHeaderValue);
Assert.Empty(headers);
count = headers.Count;
Assert.Equal(0, count);
}
public void ValueReuseEmptyAfterReset(bool reuseValue, KnownHeader header)
{
const string HeaderValue = "Hello";
var headers = new HttpRequestHeaders(reuseHeaderValues: reuseValue);
var headerName = Encoding.ASCII.GetBytes(header.Name).AsSpan();
var prevSpan = Encoding.UTF8.GetBytes(HeaderValue).AsSpan();
headers.Append(headerName, prevSpan, checkForNewlineChars: false);
headers.OnHeadersComplete();
var prevHeaderValue = ((IHeaderDictionary)headers)[header.Name].ToString();
Assert.NotNull(prevHeaderValue);
Assert.NotEqual(string.Empty, prevHeaderValue);
Assert.Equal(HeaderValue, prevHeaderValue);
Assert.NotSame(HeaderValue, prevHeaderValue);
Assert.Single(headers);
var count = headers.Count;
Assert.Equal(1, count);
headers.Reset();
// Empty after reset
var nextHeaderValue = ((IHeaderDictionary)headers)[header.Name].ToString();
Assert.NotNull(nextHeaderValue);
Assert.Equal(string.Empty, nextHeaderValue);
Assert.NotEqual(HeaderValue, nextHeaderValue);
Assert.Empty(headers);
count = headers.Count;
Assert.Equal(0, count);
headers.OnHeadersComplete();
// Still empty after complete
nextHeaderValue = ((IHeaderDictionary)headers)[header.Name].ToString();
Assert.NotNull(nextHeaderValue);
Assert.Equal(string.Empty, nextHeaderValue);
Assert.NotEqual(HeaderValue, nextHeaderValue);
Assert.Empty(headers);
count = headers.Count;
Assert.Equal(0, count);
}