How to POST attachment to JIRA using REST API?

Question

How to POST attachment to JIRA using JIRA REST API and HttpWebRequest in C#?

From the documentation under /rest/api/2/issue/{issueIdOrKey}/attachment

Answer 1

You're also able to do with Restsharp as follow

using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using Jira
using RestSharp;
using RestSharp.Authenticators;

namespace Jira
{
    class Program
    {
      static void Main(string[] args)
      {
        var client = new RestClient("http://{URL}/rest/api/2");
        var request = new RestRequest("issue/", Method.POST);

        client.Authenticator = new HttpBasicAuthenticator("user", "pass");

        var issue = new Issue
        {
            fields =
                new Fields
                {
                    description = "Issue Description",
                    summary = "Issue Summary",
                    project = new Project { key = "KEY" }, 
                    issuetype = new IssueType { name = "ISSUE_TYPE_NAME" }
                }
        };

        request.AddJsonBody(issue);

        var res = client.Execute(request);

        if (res.StatusCode == HttpStatusCode.Created)
        {
            Console.WriteLine("Issue: {0} successfully created", res.Data.key);

            #region Attachment            
            request = new RestRequest(string.Format("issue/{0}/attachments", res.Data.key), Method.POST);

            request.AddHeader("X-Atlassian-Token", "nocheck");

            var file = File.ReadAllBytes(@"C:\FB_IMG_1445253679378.jpg");

            request.AddHeader("Content-Type", "multipart/form-data");
            request.AddFileBytes("file", file, "FB_IMG_1445253679378.jpg", "application/octet-stream");

            var res2 = client.Execute(request);

            Console.WriteLine(res2.StatusCode == HttpStatusCode.OK ? "Attachment added!" : res2.Content);
            #endregion
        }
        else
            Console.WriteLine(res.Content);
      }
    }

    public class Issue
    {
        public string id { get; set; }
        public string key { get; set; }
        public Fields fields { get; set; }
    }

    public class Fields
    {
        public Project project { get; set; }
        public IssueType issuetype { get; set; }
        public string summary { get; set; }
        public string description { get; set; }        
    }

    public class Project
    {
        public string id { get; set; }
        public string key { get; set; }
    }

    public class IssueType
    {
        public string id { get; set; }
        public string name { get; set; }
    }
}

The whole code is on gist https://gist.github.com/gandarez/c2c5b2b27dbaf62a0d634253529bcb59