public static UserAgent ToUserAgent(UserAgentComponent component)
{
var userAgent = new UserAgent
{
Product = component.Product,
Version = component.Version,
};
if (!string.IsNullOrWhiteSpace(component.Comment))
{
var commentComponents = ParseUserAgentComment(component.Comment);
if (commentComponents.Length > 0)
{
userAgent.Platform = commentComponents[0].Trim();
}
if (commentComponents.Length > 1)
{
userAgent.PlatformVersion = commentComponents[1].Trim();
}
if (commentComponents.Length > 2)
{
userAgent.Properties.Add("HwModel", commentComponents[2]);
}
}
return(userAgent);
}
public static IEnumerable <UserAgentComponent> ParseUserAgentString(string userAgentString)
{
var userAgentComponents = new List <UserAgentComponent>();
UserAgentComponent userAgentComponent = null;
userAgentString = userAgentString.Trim();
while (!string.IsNullOrWhiteSpace(userAgentString))
{
var currentFragment = userAgentString.StartsWith("(")
? UserAgentStringFragment.Comment
: UserAgentStringFragment.Product;
switch (currentFragment)
{
case UserAgentStringFragment.Product:
if (userAgentComponent == null ||
userAgentComponent.Product != null ||
userAgentComponent.Version != null ||
userAgentComponent.Comment != null)
{
if (userAgentComponent != null)
{
userAgentComponents.Add(userAgentComponent);
}
userAgentComponent = new UserAgentComponent();
}
string product;
var productVersion = string.Empty;
var delimiterPos = userAgentString.IndexOf(" ", StringComparison.Ordinal);
var openBracketPosition = userAgentString.IndexOf("(", StringComparison.Ordinal);
delimiterPos = delimiterPos < 0
? openBracketPosition
: openBracketPosition < 0
? delimiterPos
: Math.Min(delimiterPos, openBracketPosition);
if (delimiterPos >= 0)
{
product = userAgentString.Substring(0, delimiterPos);
userAgentString = userAgentString.Substring(delimiterPos).TrimStart();
}
else
{
product = userAgentString;
userAgentString = string.Empty;
}
var slashPosition = product.IndexOf("/", StringComparison.Ordinal);
if (slashPosition >= 0)
{
productVersion = product.Substring(slashPosition + 1);
product = product.Substring(0, slashPosition);
}
userAgentComponent.Product = product;
userAgentComponent.Version = productVersion;
break;
case UserAgentStringFragment.Comment:
userAgentString = userAgentString.Substring(1);
if (userAgentComponent == null ||
userAgentComponent.Comment != null)
{
if (userAgentComponent != null)
{
userAgentComponents.Add(userAgentComponent);
}
userAgentComponent = new UserAgentComponent();
}
var bracketIndex = 1;
var closingBracketPosition = -1;
for (int i = 0; i < userAgentString.Length; i++)
{
if (userAgentString[i] == '(')
{
bracketIndex++;
}
if (userAgentString[i] == ')')
{
bracketIndex--;
}
if (bracketIndex == 0)
{
closingBracketPosition = i;
break;
}
}
if (closingBracketPosition >= 0)
{
var comment = userAgentString.Substring(0, closingBracketPosition);
userAgentString = userAgentString.Substring(closingBracketPosition + 1).TrimStart();
userAgentComponent.Comment = comment;
}
else
{
return(new List <UserAgentComponent>());
}
break;
}
}
if (userAgentComponent != null)
{
userAgentComponents.Add(userAgentComponent);
}
return(userAgentComponents);
}
