我正在javascript angularJS客户端中使用SignalR为我们的内部应用程序开发一个聊天应用程序，其中包含（目前自托管）webAPI。这是跨域连接。
使用SignalR 2.2.1
使用Owin 3.0.1
如果相关
，请使用Angular 1.5.7我的问题是每当我尝试与我的集线器建立联系时，
[08:26:38 GMT-0400 (Est (heure d’été))] SignalR: Auto detected cross domain url.jquery.signalR.js:82
[08:26:38 GMT-0400 (Est (heure d’été))] SignalR: Client subscribed to hub 'chathub'.jquery.signalR.js:82
[08:26:38 GMT-0400 (Est (heure d’été))] SignalR: Negotiating with 'https: localhost:44361/signalr/negotiateclientProtocol=1.5&connectionData=%5B%7B%22name%22%3A%22chathub%22%7D%5D'.jquery.signalR.js:82
[08:26:38 GMT-0400 (Est (heure d’été))] SignalR: webSockets transport starting.jquery.signalR.js:82
[08:26:38 GMT-0400 (Est (heure d’été))] SignalR: Connecting to websocket endpoint 'wss: localhost:44361/signalr/connect?transport=webSockets&clientProtocol=1…kAIY9w9Q%3D%3D&connectionData=%5B%7B%22name%22%3A%22chathub%22%7D%5D&tid=4'.jquery.signalR.js:82
[08:26:38 GMT-0400 (Est (heure d’été))] SignalR: Websocket opened.
启动请求失败
[08:26:38 GMT-0400 (Est (heure d’été))] SignalR: webSockets transport connected. Initiating start request.
Failed to load resource: the server responded with a status of 500 ()
XMLHttpRequest cannot load https: localhost:44361/signalr/start?transport=webSockets&clientProtocol=1…D%3D&connectionData=%5B%7B%22name%22%3A%22chathub%22%7D%5D&_=1471436795468. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'https: localhost:3000' is therefore not allowed access. The response had HTTP status code 500.
我已经尝试将此问题确定为几天，并且注意到在启动请求调用中，响应缺少“Access-Control-Allow-Origin”标头。最让我烦恼的是，协商请求和中止请求都包含标题
协商请求
Request URL:https: localhost:44361/signalr/negotiate?clientProtocol=1.5&connectionData=%5B%7B%22name%22%3A%22chathub%22%7D%5D&_=14714 39245326
Request Method:GET
Status Code:200 OK
Remote Address:[::1]:44361
响应标题
Access-Control-Allow-Credentials:true
Access-Control-Allow-Origin:https: localhost:3000
Cache-Control:no-cache
Content-Type:application/json; charset=UTF-8
Date:Wed, 17 Aug 2016 13:07:29 GMT
Expires:-1
Pragma:no-cache
Server:Microsoft-IIS/10.0
Transfer-Encoding:chunked
X-AspNet-Version:4.0.30319
X-Content-Type-Options:nosniff
X-Powered-By:ASP.NET
X-SourceFiles:=?UTF-8?B?QzpcVXNlcnNccmFwaGFlbC5tb3JpblxTb3VyY2VcUmVwb3NcVGVhbXdvcmtTb2x1dGlvblxUZWFtd29yay5BcGlcc2lnbmFsclxuZWdvdGlhdGU=?=
但不是我的开始请求
开始申请
Request URL:https: localhost:44361/signalr/start?transport=webSockets&clientProtocol=1.5&connectionToken=tR9V6HAxpgmW7r5Ro%2BzJzhUoJdMUcmv7eDv1ZDM%2Fq6yur21LXCZ2Dg1rrNrDGc5VBXQzfanyisyZKOcWNP7SKOl3TsTkBl3luS4I2UnYtdw8biviZ5NtcE1caoXPi3lVHaHs%2FjQnicwGVDlmJdvRzA%3D%3D&connectionData=%5B%7B%22name%22%3A%22chathub%22%7D%5D&_=1471439245327
Request Method:GET
Status Code:500 Internal Server Error
Remote Address:[::1]:44361
响应标题
Cache-Control:private
Content-Type:text/html; charset=utf-8
Date:Wed, 17 Aug 2016 13:08:05 GMT
Server:Microsoft-IIS/10.0
Transfer-Encoding:chunked
X-AspNet-Version:4.0.30319
X-Powered-By:ASP.NET
X-SourceFiles:=?UTF-8?B?QzpcVXNlcnNccmFwaGFlbC5tb3JpblxTb3VyY2VcUmVwb3NcVGVhbXdvcmtTb2x1dGlvblxUZWFtd29yay5BcGlcc2lnbmFsclxzdGFydA==?=
这是我的启动课程
[assembly: OwinStartup(typeof(Teamwork.Api.Startup))]
namespace Teamwork.Api
{
public partial class Startup
{
public void Configuration(IAppBuilder app)
{
ConfigureAuth(app);
app.Map("/signalr", map =>
{
map.UseCors(CorsOptions.AllowAll);
var hubConfiguration = new HubConfiguration {
EnableJavaScriptProxies = false,
EnableDetailedErrors = true};
map.RunSignalR(hubConfiguration);
});
}
}
}
我的中心
namespace Teamwork.Api.Hubs
{
public class ChatHub : Hub
{
public void TransferMessage(string receiver, string message)
{
var name = this.Context.User.Identity.Name;
var context = GlobalHost.ConnectionManager.GetHubContext<ChatHub>();
context.Clients.Group(name).AddMessage(name, message);
context.Clients.Group(receiver).AddMessage(receiver, message);
}
public override Task OnDisconnected(bool stopCalled)
{
var name = this.Context.User.Identity.Name;
Clients.All.changeStatus(name, 4);
return base.OnDisconnected(stopCalled);
}
public override Task OnConnected()
{
var name = this.Context.User.Identity.Name;
Clients.All.changeStatus(name, 0);
return Groups.Add(name, name);
}
}
}
我使用angularJS服务提供商访问它，直到我尝试订阅我的集线器时没有任何问题
服务提供商
class ChatServiceProvider implements IChatServiceProvider {
baseUrl: string;
chatHub: HubProxy;
public setBaseUrl(url: string) {
this.baseUrl = url;
}
public $get(
$rootScope: fuse.interfaces.IRootScope
): IChatService {
var self = this;
var connection = $.hubConnection(self.baseUrl);
var chatHub = connection.createHubProxy("chatHub");
function initialize(): JQueryPromise<any> {
connection.logging = true;
return connection.start();
};
return {
chatHub: undefined,
initialize: () => {
return initialize()
},
on: function (eventName, callback) {
chatHub.on(eventName, function (result: any) {
$rootScope.$apply(function () {
if (callback) {
callback(result);
}
});
});
}
}
}
控制器
self.chatService.on("addMessage", function (name: string, message: string) {
this.addMessage(name, message);
})
this.$scope.reply = function (id: string, message: string) {
this.chatService.chatHub.invoke("transferMessage", id, message);
}
this.chatService.initialize()
.done(function (data: HubProxy) {
self.chatService.chatHub = data;
console.log("Connected");
})
.fail(function () { console.log("Failed") });
我尝试将此代码添加到我的Global.asax文件中，但没有成功：
Context.Response.AppendHeader("Access-Control-Allow-Credentials", "true");
var referrer = Request.UrlReferrer;
if (Context.Request.Path.Contains("/signalr") && referrer != null){
Context.Response.AppendHeader("Access-Control-Allow-Origin", referrer.Scheme + ": " + referrer.Authority);
}
我一直在寻找类似问题的4天，但我找不到。由于我不熟悉webAPI和HtmlRequest，我可能会错过一些明显的东西。如果没有，那么任何提示/想法/答案将不胜感激。如果遗漏了任何内容，请告诉我，我会尽快添加。