Tools.Webkit 1.0.3

Webkit

Webkit is a SDK for ASP.NET applications. This SDK provides a wide range of useful tools for data management, logging, authentication, authorization, security, sessions, telemetry and more.

Table of Content

1. Extensions
   • Logging
     • void <T>.Log(T value)
     • void <T>.Log(T value, string prependText)
     • void <T>.Log(T value, string prependText, string appendText)
     • void <T>.LogAsJson(T value)
     • void <T>.LogAsJson(T value, string prependText)
     • void <T>.LogAsJson(T value, string prependText, string appendText)
     • void <T>.LogAsXml(T value)
     • void <T>.LogAsXml(T value, string prependText)
     • void <T>.LogAsXml(T value, string prependText, string appendText)
   • Console
     • void ConsoleColor.Write(object value)
     • void ConsoleColor.WriteLine(object value)
   • Data conversion
     • string Stream.AsString()
     • string string.Collapse()
     • string IHeaderDictionary.AsString()
     • string <T>.AsJson()
     • string <T>.AsXml()
     • string byte[].AsString()
     • string byte[].AsString(Encoding encoding)
     • byte[] string.AsByteArray()
     • byte[] string.AsByteArray(Encoding encoding)
   • Compression
     • byte[] byte[].GZipCompress(CompressionLevel level)
     • byte[] byte[].GZipDecompress()
     • byte[] byte[].BrotliCompress(CompressionLevel level)
     • byte[] byte[].BrotliDecompress()
2. Security
   • CryptographicGenerator
     • string Seed(int length = 40)
     • string UnicodeSeed(int length = 40)
   • JsonSecurityToken
   • Password.PasswordHandler
     • string Hash(string password)
     • bool Validate(string password, string hash)

Webkit.Extensions

Webkit contains a couple extension methods to make data conversion and management a lot easier.

Webkit.Extensions.Logging

Action<object> DefaultLog(object data)

The method used when Log methods are called. This is defaulted to Console.WriteLine

LoggingExtensions.DefaultLog = (object data) =>
{
	Console.WriteLine(data);
}

<void> <T>.Log(T value)

Performs a .ToString() on value and calls the logging action.

int number = 3;
number.Log(); // 3

<void> <T>.Log(T value, string prependText)

Performs a .ToString() on value, prepends text then calls the logging action.

int number = 3;
number.Log("Number: "); // Number: 3

<void> <T>.Log(T value, string prependText, string appendText)

Performs a .ToString() on value, prepends and appends text then calls the logging action.

int number = 3;
number.Log("There are ", " items left"); // There are 3 items left

<void> <T>.LogAsJson(T value)

Performs a Json.Serialize on value and calls the logging action.

int number = 3;
number.Log(); // 3

<void> <T>.LogAsJson(T value, string prependText)

Performs a Json.Serialize on value, prepends text then calls the logging action.

int number = 3;
number.Log("Number: "); // Number: 3

<void> <T>.LogAsJson(T value, string prependText, string appendText)

Performs a Json.Serialize on value, prepends and appends text then calls the logging action.

int number = 3;
number.Log("There are ", " items left"); // There are 3 items left

<void> <T>.LogAsXml(T value)

Converts value to a XML sheet then calls the logging action.

int number = 3;
number.Log(); // 3

<void> <T>.LogAsXml(T value, string prependText)

Converts value to a XML sheet, prepends text then calls the logging action.

int number = 3;
number.Log("Number: "); // Number: 3

<void> <T>.LogAsXml(T value, string prependText, string appendText)

Converts value to a XML sheet, prepends and appends text then calls the logging action.

int number = 3;
number.Log("There are ", " items left"); // There are 3 items left

Webkit.Extensions.Console

Webkit has a couple extensions to make console logging with color quicker and easier.

<void> ConsoleColor.WriteLine(object value)

Writes value and appends Environment.NewLine to the console with specified console color.

ConsoleColor.Yellow.WriteLine("[Warning] Service is disabled, this may impact user experience."); // [Warning] Service is disabled, this may impact user experience.\r\n

<void> ConsoleColor.Write(object value)

Writes value to the console with specified console color.

ConsoleColor.Yellow.Write("[Warning] Service is disabled, this may impact user experience."); // [Warning] Service is disabled, this may impact user experience.

Webkit.Extensions.DataConversion

These extensions help convert and manage data to different formats.

<string> Stream.AsString()

Converts a stream to a string.

<string> string.Collapse()

Collapses the newlines in the string, making it one line.

@"Lorem ipsum
dolor sit
amet".Collapse();

// Lorem ipsum dolor sit amet

<string> IHeaderDictionary.AsString()

Converts a dictionary of headers to a string.

Request.Headers.AsString();

/*
Host: example.com
Content-Type: text/plain
Content-Length: 57
*/

<string> <T>.AsJson()

Converts any value to a json string

User user = new User()
{
	Name = "John",
	Email = "john@example.com"
};

user.AsJson();

/*
{
	"Name": "John",
	"Email": "john@example.com"
}
*/

<string> <T>.AsXml()

Converts any value to a XML sheet

User user = new User()
{
	Name = "John",
	Email = "john@example.com"
};

user.AsXml();

/*
<User xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
	<Name>John</Name>
	<Email>john@example.com</Email>
</User>
*/

Webkit.Security

Webkit contains a couple methods to manage data that needs to be cryptographically secure.

<string> CryptographicGenerator.Seed(int length)

Generates a cryptographically safe and universally unique seed. The seed will always be 9 characters longer than specified.

CryptographicGenerator.Seed(40); // Ujg2LLlbu1BspM6kmPk6dT7D71KpmoxbP3uNwJGP-8DC39DE328E6BD3

<string> CryptographicGenerator.UnicodeSeed(int length)

Generates a cryptographically safe and universally unique seed using the unicode range. The seed will always be 9 characters longer than specified.

CryptographicGenerator.UnicodeSeed(40); // ㉔ᩰ⩠ᇤみ᪸ㅇ┗᪄⯿㏹᰷┚₎ḇ◱⡈⚺ᅗ❽⁊ᐬ⫴⏿⺢ሱᴥᙵᙳᓃṵ⯱ᮈ⺶⽢᤹❽㏡⚐㊯-8DC39DE94A69998

Authentication

Webkit has a couple useful features to make authentication and authorization easier

AuthenticateAttribute : ActionFilterAttribute

This attribute will check the validity of a user token before executing the action. The user token is stored in cokies under token. AuthenticateAttribute uses an in-memory cache to store sessions. These can be found in UserSessionCache. Set the AuthenticateAttribute.Validate action to implement your own method.

AuthorizeAttribute : ActionFilterAttribute

This attribute will check if a user has a specified role but will NOT determine if the user is authenticated. Use the AuthenticateAttribute and AuthorizeAttribute on the same endpoint to check both. You can specify what role is required for the endpoint by setting Role in the attribute.

Here is an example of how webkit authentication should be implemented.

[HttpPost("login")]
public ActionResult Login([FromBody] LoginDto loginDto)
{
    using(MockDatabase mockDb = new MockDatabase())
    {
        List<User> users = mockDb.Users.Where(user => user.Username == loginDto.Username && PasswordHandler.Validate(loginDto.Password, user.Password)).ToList();
        if(!users.Any())
        {
            return NotFound();
        }

        User user = users.First();
        JsonSecurityToken jsonToken = new JsonSecurityToken(user.Id, user.Roles);

        DateTime tokenExpiration = DateTime.Now.AddDays(30);
        string token = UserSessionCache.Register(jsonToken, tokenExpiration);
        user.Token = token;

        mockDb.SaveChanges();

        Response.Cookies.Append("token", token, new CookieOptions
        {
            Expires = tokenExpiration,
        });
        return Ok();
    }
}

public class LoginDto
{
    public string Username { get; set; } = "";

    public string Password { get; set; } = "";
}

Telemetry