EVE Technology Lab

Help me reboot my career as a coder.

I'm looking for sample C# code to authenticate a user.

After that, I'm sure it gets easy to get back in the saddle.

Thanks.

hey man.

bunch of useful crap here.

register your application (even for test purposes) here.
this will generate a client id and secret key you will then use to authenticate users.

check out the esi interface here, you'll want to use this over all the old methods.

in theory, it could look something like this.
user hits login button which will re-direct to ccp and grab an authentication code for the character they want to use:

[HttpPost]
public RedirectResult Index()
{
    string redirect_url = "http://localhost/ropeyevetest/index/callbackaction";
    string clientid = "CLIENT ID FROM APPLICATION REGISTRATION";
    string scope = "esi-location.read_location.v1";
    string url = $"https://login.eveonline.com/oauth/authorize/?response_type=code&redirect_uri={redirect_url}&client_id={clientid}&scope={scope}";
    return Redirect(url);
}

redirect url is where ccp will post back to with the authorisation code & you set this up when you regiser your app.
scope are the apis you seek permission to access for the given character; in this instance just character location.
when the user hits authorize, they'll drop back into your callback url.

here you could do something like this:

public ActionResult CallbackAction()
{
    string auth_code = Request.Params["code"];

    // now we can use the authorization code to grab an access token.
    using (var client = new WebClient())
    {
        // build and apply the authorisation header.
        string clientid = "CLIENT ID FROM APPLICATION REGISTRATION";
        string secret = "SECRET KEY FROM APPLICATION REGISTRATION";
        string auth_header = $"{clientid}:{secret}";
        string auth_header_64 = $"Basic {Convert.ToBase64String(Encoding.UTF8.GetBytes(auth_header))}";
        client.Headers[HttpRequestHeader.Authorization] = auth_header_64;

        // build the post parameters.
        var post_params = new NameValueCollection();
        post_params.Add("grant_type", "authorization_code");
        post_params.Add("code", auth_code);
        
        // post info and grab the response.
        byte[] response = client.UploadValues("https://login.eveonline.com/oauth/token", "POST", post_params);
        string actual_response = Encoding.UTF8.GetString(response);
    }
    
    return View();
}

the response is just a json object, which contains an access token you can use over and over to call the permitted apis.
read the linked site for more info about the refresh token, etc.

calling an API is then as simple as this:

[HttpPost]
public ActionResult Locate(string command)
{
    string access_token = "ACCESS TOKEN FROM CCP";

    using (var client = new WebClient())
    {
        // apply the authorisation header.
        string auth_header = $"Bearer {access_token}";
        client.Headers[HttpRequestHeader.Authorization] = auth_header;

        string response = client.DownloadString("https://esi.tech.ccp.is/latest/characters/SOME-CHARACTER-ID/location/");
    }

    return View();
}

etc.

Cherry,

Finally working on this and using your stuff unaltered.

I am logging in and getting back the auth_code but still getting a 403 when I hit

https://esi.tech.ccp.is/latest/characters/12345/assets/?datasource=tranquility

I know my scopes are correct because I grabbed all of them (doh).

No easy way to show you what i've got and I'm sure how to debug this.

Any recommendations?

Right. Got that. I'd done both...made em available in devsite and stuck all of them in my string.

So, my problem is more fundamental....C# and web app, in general, is all new to me.

There is a "DOH" in here somewhere....

public ActionResult CallbackAction()
{
string auth_code = Request.Params["code"];

// now we can use the authorization code to grab an access token.
using (var client = new WebClient())
{
// build and apply the authorization header.
string clientid = "blah";
string secret = "blah";
string auth_header = $"{clientid}:{secret}";
string auth_header_64 = $"Basic {Convert.ToBase64String(Encoding.UTF8.GetBytes(auth_header))}";
client.Headers[HttpRequestHeader.Authorization] = auth_header_64;

// build the post parameters.
var post_params = new NameValueCollection();
post_params.Add("grant_type", "authorization_code");
post_params.Add("code", auth_code);

byte[] response = client.UploadValues("https://login.eveonline.com/oauth/token", "POST", post_params);
string actual_response = Encoding.UTF8.GetString(response);

Assets(actual_response);
}

return View();

---

public void Assets(string command)
{

string access_token = command;

using (var client = new WebClient())
{
// apply the authorization header.
string auth_header = $"Bearer {access_token}";
client.Headers[HttpRequestHeader.Authorization] = auth_header;

string responseNew = client.DownloadString("https://esi.tech.ccp.is/latest/characters/9999999999/assets/?datasource=tranquility");
}

return;