Network Programming in .NET

The LinkedIn API has of late been very much limited to very basic functionality, and you may want to get more information out of it.

I based this API on these two sources

// https://github.com/nickls/linkedin-unofficial-api

and

// https://www.tarlogic.com/blog/usuarios-y-direcciones-de-correo-con-linkedin-harverster/

Unfortunately, this code is actually not suitable as a web service or from a website, since LinkedIn will detect that the login request is coming from a unusual IP (location), and kick you out. But it would be useful for client-side code.

So, here’s the login code – at a high level

HttpOverTcpRequest http = new HttpOverTcpRequest();
var welcomeRaw = http.Request(“https://www.linkedin.com/uas/authenticate”);
var welcome = http.ParseHttpResponse(welcomeRaw);
var lCookies = welcome.Headers[“Set-Cookie”];
lCookies.RemoveAll(c => c.Contains(“delete me”) || c.Contains(“deleteMe”)); // Remove empty cookies
var jSessionIdRaw = lCookies.First(c => c.Contains(“JSESSIONID”));
var jSessionId = jSessionIdRaw.Split(new[] { ‘;’ })[0].Substring(12);
var postdata = “session_key=” + username + “&session_password=” + password + “&JSESSIONID=”+ jSessionId;
var loginRaw = http.Request(“https://www.linkedin.com/uas/authenticate”, postdata, lCookies);
var login = http.ParseHttpResponse(loginRaw);
var lCookies2 = login.Headers[“Set-Cookie”];
lCookies.AddRange(lCookies2);

Then, you need to keep hold of your lCookies array, and pass it back in when making requests such as;

// /li/v1/pages/you
var YouRaw = http.Request(“https://touch.www.linkedin.com/” + query, lCookiesFromDb);
var you = http.ParseHttpResponse(YouRaw);
var strJson = RemoveQuirks(you.Body);
Response.Write(strJson);