带有路由参数,asp.net核心和SignalR后端的vuejs历史模式路由问题

时间:2020-06-01 19:05:50

标签: vue.js signalr

我正在将VueJS前端与vue-router和SignalR ASP.NET Core后端一起使用。

现在,我希望能够让我的客户连接到会议室,并仅将数据发送给该组的成员。我通过在后端使用两种方法来做到这一点,一种方法是创建一个房间,然后向它们发送一个12字符长的随机生成的字符串,该字符串存储在内存中,或者通过加入一个组,将这些字符串之一作为Join Room方法的参数来发送。现在,这可以正常工作,但我也希望能够通过链接附加到URL上的组ID字符串进行连接。那就是myurl.com/room/:groupId,我打算通过路由到同一组件来实现,但是在后一种情况下,它具有一个带有URL参数:groupId的属性集。这确实有效,并且在通常输入此groupId的对话框中,它已正确显示。

无论如何,导航到myurl.com/room/:groupId时,我确实在DevTools中收到以下错误消息: Error: Failed to complete negotiation with the server: SyntaxError: JSON.parse: unexpected character at line 1 column 1 of the JSON data

现在,我认为这与我的Startup.cs内部的后端配置有关,我已经从某个位置粘贴了此代码,以避开在不是“ /”的每个路径上获取404的问题:

public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
      if (env.IsDevelopment())
      {
        app.UseDeveloperExceptionPage();
      }

      app.UseRouting();
      app.UseDefaultFiles();
      app.UseStaticFiles();


      app.UseEndpoints(endpoints =>
      {
        Console.WriteLine(endpoints.ToString());
        Console.WriteLine("^^^^^^^^^^^^^^^^^^^^^^");
        endpoints.MapHub<DraftHub>("/drafthub");
      });

      //this function right here is what i mean, it sends index.html after assembling the path with vue-router i suppose?
      app.Run( async (context) =>
        {
          context.Response.ContentType = "text/html";
          await context.Response.SendFileAsync(Path.Combine(env.WebRootPath,"index.html"));
      });

    }

所以我想知道,该错误是否表示SignalR协商失败,因为资源库是text / html而不是text / json?如果是这种情况,那么为什么在我没有附加groupId的情况下导航到URL myurl.com/room时协商不会失败?它使用相同的后备await context.Response.SendFileAsync(Path.Combine(env.WebRootPath,"index.html"));吗?请注意,这两个路径都路由到我的前端中完全相同的Component,只有URL中带有groupId的路径将其作为prop传递,因此将其设置为默认值。

这里是组件的代码。

<template>
  <base-view>
    <join-dialog
      v-model="visible"
      :login-info.sync="loginInfo"
      @click:create="createRoom"
      @click:join="joinRoom"
    />
    <chat-sidebar
      :users="connectionInfo.groupConnections"
      :my-name="loginInfo.userName"
      :user="loginInfo.userName"
      :group-id="connectionInfo.groupId"
    />
  </base-view>
</template>

<script lang="ts">
import { defineComponent, ref, Ref } from "@vue/composition-api";
import JoinDialog from "@/components/JoinDialog.vue";
import ChatSidebar from "@/components/ChatSidebar.vue";
import ChessBoard from "@/components/Chess/ChessBoard.vue";
import {
  sendCreateRoom,
  onUpdateRoom,
  ConnectionInfo,
  sendJoinRoom,
  start,
} from "@/service/signalr/draftHub";
import { createLoginInfo } from "../service/models";

export default defineComponent({
  components: {
    JoinDialog,
    ChatSidebar,
    ChessBoard,
  },
  props: {
    groupId: {      // THIS HERE IS SET WHEN URL HAS GROUP ID IN IT.
      type: String,
      default: () => "",
    },
  },
  setup(props) {
    const visible = ref(true);
    const loginInfo = ref(createLoginInfo());

    loginInfo.value.groupId = props.groupId; //ALREADY SET THE GROUP ID INCASE IT WAS IN THE URL

    const connectionInfo: Ref<ConnectionInfo> = ref({});

    const createRoom = () => {
      sendCreateRoom(loginInfo.value.userName).then(
        () => (visible.value = false)
      );
    };

    const joinRoom = () => {
      sendJoinRoom(loginInfo.value).then(() => (visible.value = false));
    };

    onUpdateRoom((connInfo: ConnectionInfo) => {
      connectionInfo.value = connInfo;
      console.log("running handler now to update users", connInfo);
    });

    start().then(() => console.log("connected to drafthub"));

    return {
      visible,
      createRoom,
      joinRoom,
      loginInfo,
      connectionInfo,
    };
  },
});
</script>

<style scoped></style>

这是我的vue-router设置:

import Vue from "vue";
import VueRouter, { RouteConfig } from "vue-router";
import Home from "../views/Home.vue";
import PrivateRoom from "../views/PrivateRoom.vue";

Vue.use(VueRouter);

const routes: Array<RouteConfig> = [
  {
    path: "/",
    name: "Home",
    component: Home,
  },
  {
    path: "/about",
    name: "About",
    // route level code-splitting
    // this generates a separate chunk (about.[hash].js) for this route
    // which is lazy-loaded when the route is visited.
    component: () =>
      import(/* webpackChunkName: "about" */ "../views/About.vue"),
  },
  {
    path: "/room",
    name: "PrivateRoom",
    component: PrivateRoom,
  },
  {
    path: "/room/:groupId",
    name: "PrivateRoomInstance",
    component: PrivateRoom,
    props: true,
  },
];

const router = new VueRouter({
  mode: "history",
  base: process.env.BASE_URL,
  routes,
});

export default router;

我希望我没有遗漏任何重要信息。如果我这样做的话,请给我打电话,非常感谢您的任何答复,我将不胜感激能指出正确的方向,因为我什至不知道它是否是路由器问题或信号发出者问题。

万一有人想深入了解我,我将保留两个github链接,分别指向frontendbackend

1 个答案:

答案 0 :(得分:-1)

所以出现这种情况的原因是,我的SignalR集线器的路径是“ / drafthub”。 由于某种原因,转到前端路径“ / room”(未附加“ /”)会将协商请求发送到正确的路径,无论如何,一旦我有了“ / room /”,它将立即将其发送到路径“ / room / drafthub”,服务器将使用默认的404后备响应,即我的index.html进行响应,然后使用客户端路由。因此,从本质上讲,它提供了两次服务,一次是在我键入URL时,另一次是我尝试升级到signalR连接。

FIX

我仍在尝试找出将其精确映射到“ / room / drafthub”的原因,但现在我也只是在我的后端的ConfigureServices方法中将Drafthub映射到了该端点:

app.UseEndpoints(endpoints =>
      {
        endpoints.MapHub<DraftHub>("/drafthub");
        endpoints.MapHub<DraftHub>("/room/drafthub");
      });