parceljs - 包裹: configured port 1234 could not be used

Question

我需要在端口 1234 上运行我的 ReactJS 应用程序但是当我运行 yarn dev ，我得到以下信息:

$ parcel src/index.html --port 1234

Server running at http://localhost:2493 - configured port 1234 could not be used.

√ Built in 11.45s.

它没有告诉我 为什么它无法在端口 1234 上运行，所以我怀疑该端口可能已经在使用中。根据 this answer ，下面应该告诉我哪个进程正在使用该端口。

Get-Process -Id (Get-NetTCPConnection -LocalPort portNumber).OwningProcess

但这并没有帮助，它给出了以下信息:

Get-NetTCPConnection : No MSFT_NetTCPConnection objects found with property 'LocalPort' equal to '1234'. Verify the value of the property and retry.

我猜这意味着没有进程绑定(bind)到端口 1234 .但如果是这样的话，为什么我不能绑定(bind)到那个端口呢？

我的 package.json如下:

{
    "name": "bejebeje.react",
    "version": "1.0.0",
    "description": "bejebeje's react-js frontend",
    "main": "index.js",
    "repository": "git@github.com:JwanKhalaf/Bejebeje.React.git",
    "author": "John",
    "license": "GPL-3.0",
    "dependencies": {
        "@fortawesome/fontawesome-svg-core": "^1.2.19",
        "@fortawesome/free-brands-svg-icons": "^5.9.0",
        "@fortawesome/free-solid-svg-icons": "^5.9.0",
        "@fortawesome/pro-light-svg-icons": "^5.9.0",
        "@fortawesome/pro-regular-svg-icons": "^5.9.0",
        "@fortawesome/pro-solid-svg-icons": "^5.9.0",
        "@fortawesome/react-fontawesome": "^0.1.4",
        "@reach/router": "^1.2.1",
        "oidc-client": "^1.8.2",
        "react": ">=16",
        "react-dom": "^0.14.9 || ^15.3.0 || ^16.0.0-rc || ^16.0",
        "react-icons": "^3.7.0",
        "styled-components": "^4.3.2"
    },
    "scripts": {
        "dev": "parcel src/index.html --port 1234",
        "build": "parcel build src/index.html"
    },
    "devDependencies": {
        "@fortawesome/fontawesome-pro": "^5.9.0",
        "axios": "^0.19.0",
        "parcel-bundler": "^1.12.3",
        "prettier": "^1.16.4",
        "sass": "^1.22.5"
    }
}

Answer 1

在创建一个尝试绑定(bind)到端口 1234 的小型 C# Web 服务器之后我仍然无法让它工作。它会尝试绑定(bind)，但会抛出异常:

An attempt was made to access a socket in a way forbidden by its access permissions.

无论如何，经过大量的痛苦和研究，这里终于奏效了:

首先，禁用 hyper-v(这将重新启动您的 PC，因此请确保保存所有工作)。在 PowerShell(以管理员身份)中运行以下命令:

dism.exe /Online /Disable-Feature:Microsoft-Hyper-V

当您的 PC 重新启动时，您需要保留所需的端口，以便 hyper-v 不会将其保留回来，再次以管理员身份通过 PowerShell，运行以下命令:

netsh int ipv4 add excludedportrange protocol=tcp startport=50051 numberofports=1

现在终于以管理员身份再次通过 PowerShell 重新启用 hyper-V(PC 将重新启动):

dism.exe /Online /Enable-Feature:Microsoft-Hyper-V /All

当您的 PC 完成并备份后，您应该能够成功绑定(bind)到该端口。