Read JSON file from within solution

Question

I want to create named HttpClients for each serve definition existing in the JSON file. But I have a problem with it. I do not know how to access this JSON file

JSON is defined like this in the project:

This file just contains a list of server names with their URLs:

{
  "servers": [
    {
      "name": "first",
      "url": "firstUrl"
    },
    {
      "name": "second",
      "url": "secondUrl"
    }
  ]
}

Then in the main file I want to use it and created named HttpClients for each of the existing URL :

builder.Services.AddHttpClient("Name", client =>
{
    client.BaseAddress = new Uri("Url");
    client.Timeout = new TimeSpan(0, 0, 30);
});

so later I could create a specific HttpClients depending on the params received:

public async Task<Players> GetPlayers(string serverName)
{
    var client = httpClientFactory.CreateClient(serverName);
    var list = await client.GetAsAsync<Players>("players.xml");
    return list;
}

odaiwa · Accepted Answer · 2022-10-08 22:53:22Z

2

You can read the JSON file and deserialize it to the model. Then you can add HttpClient services to the service collection using this model.

Create your models according to your JSON structure;

public class TestModel
{
    public List<Server> Servers { get; set; }
}

public class Server
{
    public string Name { get; set; }
    public string Url { get; set; }    
}

Add services;

var jsonContent = File.ReadAllText("yourfilepath", Encoding.UTF8);

var json = JsonConvert.DeserializeObject<TestModel>(jsonContent);

foreach (var server in json.Servers)
{
    builder.Services.AddHttpClient(server.Name, client =>
    {
        client.BaseAddress = new Uri(server.Url);
        client.Timeout = new TimeSpan(0, 0, 30);
    });
}

That should work.

If you want read JSON easily from your entire application, you can use my open-source library.

edited Oct 8, 2022 at 22:53

odaiwa

3352 silver badges15 bronze badges

answered Oct 8, 2022 at 13:48

bugrakosen

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Comments

Hamid Siaban · Accepted Answer · 2022-10-08 13:54:29Z

2

You can add any json file to the builder's Configuration, and read its data.

public class ServerModel
{
    public string Name { get; set; }
    public string Url { get; set; }
}

builder.Configuration.AddJsonFile("ServerList/servers.json");
IEnumerable<ServerModel> servers = builder.Configuration.GetSection("servers").Get<IEnumerable<ServerModel>>();

foreach(var server in servers)
{
    builder.Services.AddHttpClient(server.Name, client =>
    {
        client.BaseAddress = new Uri(server.Url);
        client.Timeout = new TimeSpan(0, 0, 30);
    });
}

answered Oct 8, 2022 at 13:54

Hamid Siaban

3454 silver badges13 bronze badges

1 Comment

JHBonarius Over a year ago

Typical situation: the accepted answer is what the OP asks, but your solution is what the OP should actually do. It's never clear what is the best action here. Probably combine both in one answer. Anyhow, +1

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