这适用于 .Net 2.0 C#，但有一些有趣的事情需要检查。
WebClient wc = new WebClient();
wc.Proxy = WebRequest.GetSystemWebProxy();
//wc.Headers[HttpRequestHeader.AcceptEncoding] = "gzip, deflate";
string strLogin = wc.DownloadString("http://localhost:8080/bonita/loginservice?username=walter.bates&password=bpm&redirect=false");
wc.Headers[HttpRequestHeader.Cookie] = wc.ResponseHeaders[HttpResponseHeader.SetCookie].ToString();
string strCookie = wc.ResponseHeaders[HttpResponseHeader.SetCookie].ToString();
string strProcesses = wc.DownloadString("http://localhost:8080/bonita/API/bpm/process?p=0");
首先，您应该知道如何确定执行的操作是否成功（登录、getProcesses 等）当您尝试登录时，"JSESSIONID=50E509D37AC28E2D725CBD45A8112FA7; Path=/bonita; HttpOnly"即使您在 Bonita 中的登录尝试不成功，您也将始终获得标题（例如）和 OK 200。
对于上一个示例的成功登录
1）您必须传递强制性表单数据：用户名，密码和重定向您还必须确保以小写形式传递重定向。"False"不会工作，"false"会工作。所以.Net假设你有一个property-> Boolean重定向。redirect.ToString().ToLower()无论哪种方式，您都必须将其设为小写，"False"而您不希望这样。
假设您尝试仅使用用户名和密码登录而不通过重定向。结果是您将获得 OK 200 和标头，但您还将获得一个错误的响应（响应必须为空），因此在下一个请求（即 getProcesses）中，您将获得 (401) Unauthorized。猜猜如果你通过redirect=False而不是redirect=false. 完全相同的。
2) 你必须得到：strLogin="" // the body of the response must be empty strCookie="JSESSIONID=4F67F134840A2C72DBB968D53772FB22; Path=/bonita; HttpOnly"
对于getProcesses上一个示例的成功，您传递从登录获得的标头
wc.Headers[HttpRequestHeader.Cookie] = wc.ResponseHeaders[HttpResponseHeader.SetCookie].ToString();
然后你调用这个过程并得到一个json格式的字符串，例如
"[{\"id\":\"6996906669894804403\",\"icon\":\"\",\"displayDescription\":\"\",\"deploymentDate\":\"2014-11-19 17:57:40.893\",\"description\":\"\",\"activationState\":\"ENABLED\",\"name\":\"Travel request\",\"deployedBy\":\"22\",\"displayName\":\"Travel request\",\"actorinitiatorid\":\"4\",\"last_update_date\":\"2014-11-19 17:57:41.753\",\"configurationState\":\"RESOLVED\",\"version\":\"1.0\"}]"
（或 [] 表示空 json）
如果 cookie 未正确传递，您将再次收到 401 错误。
.Net 4.5.1 的解决方案
using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Net;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Text;
using System.Threading.Tasks;
using System.Web;
namespace BonitaRestApi
{
class BonitaApi
{
private CookieCollection collection;
string strCookietoPass;
string sessionID;
static void Main(string[] args)
{
BonitaApi obj = new BonitaApi();
Task login = new Task(obj.Login);
login.Start();
login.Wait();
Console.ReadLine();
Task GetProcesses = new Task(obj.GetProcesses);
GetProcesses.Start();
GetProcesses.Wait();
Console.ReadLine();
Task logout = new Task(obj.Logout);
logout.Start();
logout.Wait();
Console.ReadLine();
}
public async void Login()
{
const string url = "http://localhost:8080/bonita/";
var cookies = new CookieContainer();
var handler = new HttpClientHandler();
handler.CookieContainer = cookies;
using (var client = new HttpClient(handler))
{
var uri = new Uri(url);
client.BaseAddress = uri;
//client.DefaultRequestHeaders.Accept.Clear();
//client.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
var content = new FormUrlEncodedContent(new[]
{
new KeyValuePair<string, string>("username", "helen.kelly"),
new KeyValuePair<string, string>("password", "bpm"),
new KeyValuePair<string, string>("redirect", "false"),
new KeyValuePair<string, string>("redirectUrl", ""),
});
HttpResponseMessage response = await client.PostAsync("loginservice", content);
if (response.IsSuccessStatusCode)
{
var responseBodyAsText = await response.Content.ReadAsStringAsync();
if (!String.IsNullOrEmpty(responseBodyAsText))
{
Console.WriteLine("Unsuccessful Login.Bonita bundle may not have been started, or the URL is invalid.");
return;
}
collection= cookies.GetCookies(uri);
strCookietoPass = response.Headers.GetValues("Set-Cookie").FirstOrDefault();
sessionID = collection["JSESSIONID"].ToString();
Console.WriteLine(string.Format("Successful Login Retrieved session ID {0}", sessionID));
// Do useful work
}
else
{
Console.WriteLine("Login Error" + (int)response.StatusCode + "," + response.ReasonPhrase);
}
}
}
public async void Logout()
{
const string url = "http://localhost:8080/bonita/";
var cookies = new CookieContainer();
var handler = new HttpClientHandler();
handler.CookieContainer = cookies;
using (var client = new HttpClient(handler))
{
var uri = new Uri(url);
client.BaseAddress = uri;
var content = new FormUrlEncodedContent(new[]
{
new KeyValuePair<string, string>("redirect", "false")
});
HttpResponseMessage response = await client.PostAsync("logoutservice", content);
if (response.IsSuccessStatusCode)
{
var responseBodyText = await response.Content.ReadAsStringAsync();
if (!String.IsNullOrEmpty(responseBodyText))
{
Console.WriteLine("Unsuccessful Logout.Bonita bundle may not have been started, or the URL is invalid.");
return;
}
Console.WriteLine("Successfully Logged out.");
}
else
{
Console.WriteLine("Logout Error" + (int)response.StatusCode + "," + response.ReasonPhrase);
}
}
}
public async void GetProcesses()
{
var handler = new HttpClientHandler();
Cookie ok = new Cookie("Set-Cookie:",strCookietoPass);
handler.CookieContainer.Add(collection);
using (var client = new HttpClient(handler))
{
var builder = new UriBuilder("http://localhost/bonita/API/bpm/process");
builder.Port = 8080;
var query = HttpUtility.ParseQueryString(builder.Query);
query["p"] = "0";
query["c"] = "10";
builder.Query = query.ToString();
Uri uri= new Uri(builder.ToString());
client.BaseAddress = uri;
HttpResponseMessage response = await client.GetAsync(uri.ToString());
if (response.IsSuccessStatusCode)
{
var responseBodyText = await response.Content.ReadAsStringAsync();
if (String.IsNullOrEmpty(responseBodyText))
{
Console.WriteLine("Unsuccessful GetProcesses.Bonita bundle may not have been started, or the URL is invalid.");
return;
}
Console.WriteLine("Successfully GetProcesses:" + responseBodyText);
}
else
{
Console.WriteLine("GetProcesses Error" + (int)response.StatusCode + "," + response.ReasonPhrase);
}
}
}
}
}