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Blazor呈现组件,但立即无法连接

blazor
  •  0
  • Paul Dempsey  · 技术社区  · 4 年前

    我跟踪了 the documentation (和许多博客)用于将blazor组件添加到razor pages应用程序。razor页面完美地呈现了组件,但随后会立即出现“尝试重新连接”,但总是失败。控制台输出显示(显然是在本地主机上运行): 

    [2020-07-20T00:22:59.957Z] Information: Normalizing '_blazor' to 'https://localhost:44306/_blazor'.
blazor.server.js:1 [2020-07-20T00:22:59.961Z] Debug: Starting HubConnection.
blazor.server.js:1 [2020-07-20T00:22:59.969Z] Debug: Starting connection with transfer format 'Binary'.
blazor.server.js:1 [2020-07-20T00:22:59.970Z] Debug: Sending negotiation request: https://localhost:44306/_blazor/negotiate?negotiateVersion=1.
blazor.server.js:1 [2020-07-20T00:23:00.145Z] Debug: Selecting transport 'WebSockets'.
blazor.server.js:1 [2020-07-20T00:23:00.174Z] Information: WebSocket connected to wss://localhost:44306/_blazor?id=vuY411dkAsPan4fQrNN3aw.
blazor.server.js:1 [2020-07-20T00:23:00.175Z] Debug: The HttpConnection connected successfully.
blazor.server.js:1 [2020-07-20T00:23:00.175Z] Debug: Sending handshake request.
blazor.server.js:1 [2020-07-20T00:23:00.176Z] Information: Using HubProtocol 'blazorpack'.
blazor.server.js:1 [2020-07-20T00:23:00.182Z] Debug: Server handshake complete.
blazor.server.js:1 [2020-07-20T00:23:00.182Z] Debug: HubConnection connected successfully.
blazor.server.js:1 [2020-07-20T00:23:00.327Z] Information: Close message received from server.
blazor.server.js:1 [2020-07-20T00:23:00.329Z] Debug: HttpConnection.stopConnection(undefined) called while in state Disconnecting.
blazor.server.js:1 [2020-07-20T00:23:00.332Z] Error: Connection disconnected with error 'Error: Server returned an error on close: Connection closed with an error.'.
e.log @ blazor.server.js:1
e.stopConnection @ blazor.server.js:1
transport.onclose @ blazor.server.js:1
e.close @ blazor.server.js:1
e.stop @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
a @ blazor.server.js:1
Promise.then (async)
c @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
M @ blazor.server.js:1
e.stopInternal @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
M @ blazor.server.js:1
e.stop @ blazor.server.js:1
e.processIncomingData @ blazor.server.js:1
connection.onreceive @ blazor.server.js:1
i.onmessage @ blazor.server.js:1
blazor.server.js:1 [2020-07-20T00:23:00.333Z] Debug: HubConnection.connectionClosed(Error: Server returned an error on close: Connection closed with an error.) called while in state Connected.
blazor.server.js:1 Uncaught (in promise) Error: Server returned an error on close: Connection closed with an error.
    at e.processIncomingData (blazor.server.js:1)
    at e.connection.onreceive (blazor.server.js:1)
    at WebSocket.i.onmessage (blazor.server.js:1)
e.processIncomingData @ blazor.server.js:1
connection.onreceive @ blazor.server.js:1
i.onmessage @ blazor.server.js:1
Promise.then (async)
c @ blazor.server.js:8
a @ blazor.server.js:8
Promise.then (async)
c @ blazor.server.js:8
(anonymous) @ blazor.server.js:8
r @ blazor.server.js:8
E @ blazor.server.js:8
(anonymous) @ Eol:12448
blazor.server.js:19 [2020-07-20T00:23:03.338Z] Error: TypeError: window.Blazor.reconnect is not a function
e.log @ blazor.server.js:19
(anonymous) @ blazor.server.js:19
(anonymous) @ blazor.server.js:19
(anonymous) @ blazor.server.js:19
a @ blazor.server.js:19
Promise.then (async)
c @ blazor.server.js:19
(anonymous) @ blazor.server.js:19
r @ blazor.server.js:19
e.attemptPeriodicReconnection @ blazor.server.js:19
e @ blazor.server.js:19
e.onConnectionDown @ blazor.server.js:19
(anonymous) @ blazor.server.js:8
(anonymous) @ blazor.server.js:1
e.completeClose @ blazor.server.js:1
e.connectionClosed @ blazor.server.js:1
connection.onclose @ blazor.server.js:1
e.stopConnection @ blazor.server.js:1
transport.onclose @ blazor.server.js:1
e.close @ blazor.server.js:1
e.stop @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
a @ blazor.server.js:1
Promise.then (async)
c @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
M @ blazor.server.js:1
e.stopInternal @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
M @ blazor.server.js:1
e.stop @ blazor.server.js:1
e.processIncomingData @ blazor.server.js:1
connection.onreceive @ blazor.server.js:1
i.onmessage @ blazor.server.js:1
blazor.server.js:19 [2020-07-20T00:23:06.346Z] Error: TypeError: window.Blazor.reconnect is not a function
e.log @ blazor.server.js:19
(anonymous) @ blazor.server.js:19
(anonymous) @ blazor.server.js:19
(anonymous) @ blazor.server.js:19
a @ blazor.server.js:19
Promise.then (async)
c @ blazor.server.js:19
a @ blazor.server.js:19
Promise.then (async)
c @ blazor.server.js:19
(anonymous) @ blazor.server.js:19
r @ blazor.server.js:19
e.attemptPeriodicReconnection @ blazor.server.js:19
e @ blazor.server.js:19
e.onConnectionDown @ blazor.server.js:19
(anonymous) @ blazor.server.js:8
(anonymous) @ blazor.server.js:1
e.completeClose @ blazor.server.js:1
e.connectionClosed @ blazor.server.js:1
connection.onclose @ blazor.server.js:1
e.stopConnection @ blazor.server.js:1
transport.onclose @ blazor.server.js:1
e.close @ blazor.server.js:1
e.stop @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
a @ blazor.server.js:1
Promise.then (async)
c @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
M @ blazor.server.js:1
e.stopInternal @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
M @ blazor.server.js:1
e.stop @ blazor.server.js:1
e.processIncomingData @ blazor.server.js:1
connection.onreceive @ blazor.server.js:1
i.onmessage @ blazor.server.js:1
blazor.server.js:19 [2020-07-20T00:23:09.353Z] Error: TypeError: window.Blazor.reconnect is not a function
e.log @ blazor.server.js:19
(anonymous) @ blazor.server.js:19
(anonymous) @ blazor.server.js:19
(anonymous) @ blazor.server.js:19
a @ blazor.server.js:19
Promise.then (async)
c @ blazor.server.js:19
a @ blazor.server.js:19
Promise.then (async)
c @ blazor.server.js:19
a @ blazor.server.js:19
Promise.then (async)
c @ blazor.server.js:19
(anonymous) @ blazor.server.js:19
r @ blazor.server.js:19
e.attemptPeriodicReconnection @ blazor.server.js:19
e @ blazor.server.js:19
e.onConnectionDown @ blazor.server.js:19
(anonymous) @ blazor.server.js:8
(anonymous) @ blazor.server.js:1
e.completeClose @ blazor.server.js:1
e.connectionClosed @ blazor.server.js:1
connection.onclose @ blazor.server.js:1
e.stopConnection @ blazor.server.js:1
transport.onclose @ blazor.server.js:1
e.close @ blazor.server.js:1
e.stop @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
a @ blazor.server.js:1
Promise.then (async)
c @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
M @ blazor.server.js:1
e.stopInternal @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
M @ blazor.server.js:1
e.stop @ blazor.server.js:1
e.processIncomingData @ blazor.server.js:1
connection.onreceive @ blazor.server.js:1
i.onmessage @ blazor.server.js:1
blazor.server.js:19 [2020-07-20T00:23:12.375Z] Error: TypeError: window.Blazor.reconnect is not a function
e.log @ blazor.server.js:19
(anonymous) @ blazor.server.js:19
(anonymous) @ blazor.server.js:19
(anonymous) @ blazor.server.js:19
a @ blazor.server.js:19
Promise.then (async)
c @ blazor.server.js:19
a @ blazor.server.js:19
Promise.then (async)
c @ blazor.server.js:19
a @ blazor.server.js:19
Promise.then (async)
c @ blazor.server.js:19
a @ blazor.server.js:19
Promise.then (async)
c @ blazor.server.js:19
(anonymous) @ blazor.server.js:19
r @ blazor.server.js:19
e.attemptPeriodicReconnection @ blazor.server.js:19
e @ blazor.server.js:19
e.onConnectionDown @ blazor.server.js:19
(anonymous) @ blazor.server.js:8
(anonymous) @ blazor.server.js:1
e.completeClose @ blazor.server.js:1
e.connectionClosed @ blazor.server.js:1
connection.onclose @ blazor.server.js:1
e.stopConnection @ blazor.server.js:1
transport.onclose @ blazor.server.js:1
e.close @ blazor.server.js:1
e.stop @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
a @ blazor.server.js:1
Promise.then (async)
c @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
M @ blazor.server.js:1
e.stopInternal @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
M @ blazor.server.js:1
e.stop @ blazor.server.js:1
e.processIncomingData @ blazor.server.js:1
connection.onreceive @ blazor.server.js:1
i.onmessage @ blazor.server.js:1
blazor.server.js:19 [2020-07-20T00:23:15.390Z] Error: TypeError: window.Blazor.reconnect is not a function
e.log @ blazor.server.js:19
(anonymous) @ blazor.server.js:19
(anonymous) @ blazor.server.js:19
(anonymous) @ blazor.server.js:19
a @ blazor.server.js:19
Promise.then (async)
c @ blazor.server.js:19
a @ blazor.server.js:19
Promise.then (async)
c @ blazor.server.js:19
a @ blazor.server.js:19
Promise.then (async)
c @ blazor.server.js:19
a @ blazor.server.js:19
Promise.then (async)
c @ blazor.server.js:19
a @ blazor.server.js:19
Promise.then (async)
c @ blazor.server.js:19
(anonymous) @ blazor.server.js:19
r @ blazor.server.js:19
e.attemptPeriodicReconnection @ blazor.server.js:19
e @ blazor.server.js:19
e.onConnectionDown @ blazor.server.js:19
(anonymous) @ blazor.server.js:8
(anonymous) @ blazor.server.js:1
e.completeClose @ blazor.server.js:1
e.connectionClosed @ blazor.server.js:1
connection.onclose @ blazor.server.js:1
e.stopConnection @ blazor.server.js:1
transport.onclose @ blazor.server.js:1
e.close @ blazor.server.js:1
e.stop @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
a @ blazor.server.js:1
Promise.then (async)
c @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
M @ blazor.server.js:1
e.stopInternal @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
(anonymous) @ blazor.server.js:1
M @ blazor.server.js:1
e.stop @ blazor.server.js:1
e.processIncomingData @ blazor.server.js:1
connection.onreceive @ blazor.server.js:1
i.onmessage @ blazor.server.js:1

    • _Layout.cshtml 包含 <base href="/"> 头和尾 <body> 它有: 

      <script src="_framework/blazor.server.js" autostart="false"></script>
<script>
    Blazor.start({
        configureSignalR: function (builder) {
            builder.configureLogging(1); // LogLevel.Information
        }
    });
</script>

    • 和 在Pages文件夹中,包含 

      @using Microsoft.AspNetCore.Authorization
@using Microsoft.AspNetCore.Components
@using Microsoft.AspNetCore.Components.Authorization
@using Microsoft.AspNetCore.Components.Forms
@using Microsoft.AspNetCore.Components.Routing
@using Microsoft.AspNetCore.Components.Web
@using Microsoft.JSInterop
@using MyAppNamespace

    • Startup.cs 有 services.AddServerSideBlazor(); 在里面 ConfigureServices 

      .MapRazorPages();
.MapBlazorHub();
.MapFallbackToPage("/_Host");

    • _Host.cshtml 在Pages文件夹中,包含 

      @page "/blazor"
@{
    Layout = "_Layout";
}

<app>
    <component type="typeof(App)" render-mode="ServerPrerendered" />
</app>

    根据控制台日志,从索引页进行连接可以正常工作,但对于另一个使用组件的页面则不行。

    我显然少了一些管道,但我不知道是什么。我错过了什么?

    更新:我尝试在索引页中使用blazor组件,在那里客户端似乎连接正常,但我看到了相同的情况:页面呈现组件,然后连接关闭,没有尝试重新连接成功。

    0 回复  |  直到 4 年前
        1
  •  0
  •   dsmolen    4 年前

    <href="/">

    <base href="/">

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