/// <summary>
/// 设置http2非加密是否支持
/// 例如：GRpc如果要对http进行支持，则需要启用
/// 执行此方法后，默认是启用
/// </summary>
/// <param name="enable">是否启动</param>
public static void SetHttp2UnencryptedSupport(bool enable = true)
{
AppContext.SetSwitch("System.Net.Http.SocketsHttpHandler.Http2UnencryptedSupport", enable);
}
static partial void PopulateOverrideValuesPartial()
{
// Retrieve the value from EE config.
string overrides = System.Runtime.Versioning.CompatibilitySwitch.GetAppContextOverridesInternalCall();
// If we have no override values, do nothing.
if (string.IsNullOrEmpty(overrides))
{
return;
}
bool encounteredEquals = false, encounteredCharsInKey = false, encounteredCharsInValue = false;
int previousSemicolonPos = -1, firstEqualsPos = -1;
// Iterate over the string one character at a time until we reach the end of the string.
for (int currentPos = 0; currentPos <= overrides.Length; currentPos++)
{
// If the current position is either ';' or 'end-of-string' then we potentially have a key=value pair
if (currentPos == overrides.Length || overrides[currentPos] == ';')
{
// We only have a key=value pair if we encountered an equals, characters in the key and in the value
// portion of the pair.
if (encounteredEquals && encounteredCharsInKey && encounteredCharsInValue)
{
// We compute the indexes in the string for key and value
int firstCharOfKey = previousSemicolonPos + 1; //+1 because we don't take the ';' char
int lenghtOfKey = firstEqualsPos - previousSemicolonPos - 1; //-1 because we don't take the '=' char
string name = overrides.Substring(firstCharOfKey, lenghtOfKey);
int firstCharOfValue = firstEqualsPos + 1; // +1 because we don't count the '='
int lengthOfValue = currentPos - firstEqualsPos - 1; // -1 because we don't count the '='
string value = overrides.Substring(firstCharOfValue, lengthOfValue);
// apply the value only if it parses as a boolean
bool switchValue;
if (bool.TryParse(value, out switchValue))
{
// If multiple switches have the same name, the last value that we find will win.
AppContext.SetSwitch(name, switchValue);
}
}
previousSemicolonPos = currentPos;
// We need to reset these flags once we encounter a ';'
encounteredCharsInKey = encounteredCharsInValue = encounteredEquals = false;
}
else if (overrides[currentPos] == '=')
{
// if the current character is '=' then we should flag it and remember it
if (!encounteredEquals)
{
encounteredEquals = true;
firstEqualsPos = currentPos;
}
}
else
{
// We need to know if the key or value contain any characters (other than ';' and '=');
if (encounteredEquals)
{
encounteredCharsInValue = true;
}
else
{
encounteredCharsInKey = true;
}
}
}
}
