Posts

AspNet Core JWT Authentication ValidateLifetime "The token has no expiration"

Found a "bug" within aspnet core JWT Authentication and thought I'd write something up since I could not find much info online.

Found the answer here, but it's not easy to find: https://github.com/SevenSpikes/api-plugin-for-nopcommerce/issues/99

Essentially, if you create a valid JWT with an expiration time after the year 2038, the default aspnet core JWT Auth will determine that it is invalid saying, "The token has no expiration".

The solution is to create a JWT with an expiration time after "now" but before the year 2038.


Hope this helps,
Aaron


United States Postal Code to State Map

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I had a need to determine the State code given a zip code/postal code and could not find a concise list I could use as the base of the map. There is a PDF available on irs.gov, but that doesn't lend itself well to automation.

Using that PDF, I generated this CSV file: https://gist.github.com/aaronhoffman/d7a598efb593e3acf5e0a39c0dd8b52a

There are two different formats depending on your use case. I hope you find it useful!
-Aaron




Newtonsoft Json BaseJsonConverter

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I've recently had a need for a custom JsonConverter to read and write data to CosmosDb in a way that utilizes a CosmosDb document's `id` property. (more on that in a later post)

My first step was to investigate a custom Newtonsoft.JsonJsonConverter. I thought that there might be a BaseJsonConverter implementation somewhere in the docs, but I was wrong.

After digging through many different custom converters, I think I've discovered what the most trivial custom converter might look like.

You can find the example here, and customize it further to fit your needs:

https://gist.github.com/aaronhoffman/de40ac508de95101fa41859195728e39


Hope this helps,
Aaron





Complete Project Gutenberg Catalog in JSON

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Project Gutenberg is an amazing site containing over 57,000 free ebooks at the time of this writing.



Recently I've been working on a project to create a database of book bibliographies. A database of book references from within other books. You'd be able to answer the query: Show me all the books that reference "Thinking Fast and Slow". I plan to use Project Gutenberg as the repository that I use to create the first version of this database.

Project Gutenberg currently makes their complete project catalog available as a collection of RDF files found here: http://www.gutenberg.org/wiki/Gutenberg:Feeds

RDF is not something I've worked with in the past, so I converted them to JSON files. You can download that set of files from here:

https://sfp.blob.core.windows.net/public/gutenberg_catalog.zip


Hope this helps,
Aaron





ASP.NET Core 2.1 Identity

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I thought I'd compile some resources on ASP.NET Core 2.1 Identity. Hope you find these useful:

Database schema of tables that are generated after the first EF Migration:

https://gist.github.com/aaronhoffman/74f4c072afaa0459dcd6595b6380f67d


You can override password rules in the Startup.cs class:

            services.AddDefaultIdentity()
                .AddEntityFrameworkStores();

            services.Configure(options =>
            {
                options.Password.RequireDigit = false;
                options.Password.RequireLowercase = false;
                options.Password.RequireUppercase = false;
                options.Password.RequireNonAlphanumeric = false;
            });


If you are wondering where the AccountController or login pages are (because they do not appear in the solution explorer by default) more info can be found here: https://docs.microsoft.com/en-us/aspnet/core/security/authentication/scaffold-identity?view=aspnetcore-2.1&tabs=visual-studio



That's it fo…