topic Nprinting Task trigger API C# (.net) in Qlik NPrinting

Nprinting Task trigger API C# (.net)

sibusiso90 — Wed, 29 Apr 2020 17:26:08 GMT

I need a C# code that will trigger a task. On our server we are not allowed to evoke html file, hence the one in javascript I can't use and would like to get someone who has done it.

Thanks

Re: Nprinting Task trigger API C# (.net)

sibusiso90 — Wed, 29 Apr 2020 20:30:42 GMT

This is the part I am working on and it is not giving me joy

//Create second HTTP request (get list of apps) and add required headers
HttpWebRequest secondRequest = (HttpWebRequest)WebRequest.Create(@"URL:4993/api/v1/tasks/f3ebd873-b310-4a22-a269-24ce81b8ce74/executions");
//assign cookie to request to maintain session
secondRequest.CookieContainer = cookies;
secondRequest.Method = "POST";
secondRequest.UserAgent = "Windows";
secondRequest.Accept = "application/json";
// specify to run as the current Microsoft Windows user
secondRequest.UseDefaultCredentials = true;

Re: Nprinting Task trigger API C# (.net)

sibusiso90 — Wed, 29 Apr 2020 21:44:17 GMT

This this code I am using but I get a forbidden error when I use the post request but works with a get request

using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;

namespace APINP
{
class Program
{
static void Main(string[] args)
{
//Create the HTTP Request (authenticate) and add required headers
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(@"URL:4993/api/v1/login/ntlm");
CookieContainer cookies = new CookieContainer();
request.CookieContainer = cookies;
request.Method = "GET";
request.UserAgent = "Windows";
request.Accept = "application/json";
// specify to run as the current Microsoft Windows user
request.UseDefaultCredentials = true;
try
{
// make the web request and return the content
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
StreamReader responseReader = new StreamReader(response.GetResponseStream());
string sResponseHTML = responseReader.ReadToEnd();
Console.WriteLine(sResponseHTML);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}

//f3ebd873-b310-4a22-a269-24ce81b8ce74

//Create second HTTP request (get list of apps) and add required headers
HttpWebRequest secondRequest = (HttpWebRequest)WebRequest.Create(@"URL:4993/api/v1/tasks/f3ebd873-b310-4a22-a269-24ce81b8ce74/executions");
//assign cookie to request to maintain session
secondRequest.CookieContainer = cookies;
secondRequest.Method = "POST";
secondRequest.UserAgent = "Windows";
secondRequest.Accept = "application/json";
secondRequest.ContentType = "application/json";
// specify to run as the current Microsoft Windows user
secondRequest.UseDefaultCredentials = true;

string data = "{\"data\"}";
try
{

//StreamReader responseReader2 = new StreamReader(response2.GetResponseStream());
//testing
var streamWriter = new StreamWriter(secondRequest.GetRequestStream());
streamWriter.Write(data);

HttpWebResponse response2 = (HttpWebResponse)secondRequest.GetResponse();
StreamReader responseReader2 = new StreamReader(response2.GetResponseStream());
string sResponseHTML2 = responseReader2.ReadToEnd();
dynamic jsonObj = JsonConvert.DeserializeObject(sResponseHTML2);
foreach (var app in jsonObj.data.items)
{
Console.WriteLine(app.name);
}
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
Console.Read();
}
}
}

Re: Nprinting Task trigger API C# (.net)

sibusiso90 — Thu, 30 Apr 2020 10:00:38 GMT

I found a solution

using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;

namespace Post_Request_API
{
class Program
{
static void Main(string[] args)
{
//Create the HTTP Request (authenticate) and add required headers
ServicePointManager.SecurityProtocol = SecurityProtocolType.Tls12;
HttpWebRequest request = (HttpWebRequest)WebRequest.Create(@"URL:4993/api/v1/login/ntlm");
//Assign custom SSL certificate validation method if certificate is untrusted
//request.ServerCertificateValidationCallback += (sender, certificate, chain, sslPolicyErrors) => true;
CookieContainer cookies = new CookieContainer(); request.CookieContainer = cookies; request.Method = "GET"; request.UserAgent = "Windows"; request.Accept = "application/json";
//Specify to run as the current Microsoft Windows user request.UseDefaultCredentials = true;
try
{
// make the web request and return the content
HttpWebResponse response = (HttpWebResponse)request.GetResponse();
StreamReader responseReader = new StreamReader(response.GetResponseStream());
string sResponseHTML = responseReader.ReadToEnd();
Console.WriteLine(sResponseHTML);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
//Create second HTTP request to add a new user and required headers
HttpWebRequest secondRequest = (HttpWebRequest)WebRequest.Create(@"URL:4993/api/v1/tasks/f3ebd873-b310-4a22-a269-24ce81b8ce74/executions");
//Assign custom SSL certificate validation method if certificate is untrusted
//secondRequest.ServerCertificateValidationCallback += (sender, certificate, chain, sslPolicyErrors) => true;
//Add the XSRF token secondRequest.Headers.Add("X-XSRF-TOKEN", cookies.GetCookies(request.RequestUri)["NPWEBCONSOLE_XSRF-TOKEN"].Value); secondRequest.CookieContainer = cookies; secondRequest.Method = "POST"; secondRequest.UserAgent = "Windows"; secondRequest.Accept = "application/json"; secondRequest.ContentType = "application/json";
//Specify to run as the current Microsoft Windows user secondRequest.UseDefaultCredentials = true;

//Prepare JSON object to send to the remote server
JsonUser user = new JsonUser(); user.ID = ""; user.type = ""; user.task = ""; user.created = ""; user.lastUpdate = ""; user.completed = ""; user.progress = ""; user.status = "Enqueued"; user.result = ""; user.priority = "";

string jUserString = JsonConvert.SerializeObject(user);
using (var streamWriter = new StreamWriter(secondRequest.GetRequestStream()))
{ streamWriter.Write(jUserString); streamWriter.Flush(); streamWriter.Close();
}
try
{
HttpWebResponse response2 = (HttpWebResponse)secondRequest.GetResponse();
StreamReader responseReader2 = new StreamReader(response2.GetResponseStream());
string sResponseHTML2 = responseReader2.ReadToEnd();
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}

public class JsonUser
{
public string ID { get; set; }
public string type { get; set; }
public string task { get; set; }
public string created { get; set; }
public string lastUpdate { get; set; }
public string completed { get; set; }
public string progress { get; set; }
public string status { get; set; }
public string result { get; set; }
public string priority { get; set; }
}
}
}