将Angular项目部署到CPanel返回错误Cors-Policy:请求源中没有Access-Control Allo

Question

这是我第一次在在线服务器上部署angular应用。这不是一个企业的事情。在部署期间，我使用了以下命令

ng build --baseHref=https://www.exampleUrl.com/ --deployUrl=https://www.exampleUrl.com/

然后我把它上传到CPanel。

1. 在最初的几分钟，我可以看到我的网页在线与绝对url "www.exampleUrl.com"在我的PC上，但应用程序无法通过移动设备访问(我想看到控制台登录移动设备，所以我不能提供日志问题)。
2. 一小时后，它返回这个错误

Access to XMLHttpRequest at 'https://www.exampleUrl.com/ngx_pagespeed_beacon?url=https%3A%2F%2FexampleUrl.com%2F' from origin 'https://exampleUrl.com' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.

紧随其后

www.exampleUrl.com/ngx_pagespeed_beacon?url=https%3A%2F%2FexampleUrl.com%2F:1 Failed to load resource: net::ERR_FAILED

我一直在冲浪通过整个相关的标签在这个论坛，但没有一个为我工作。任何评论都将非常感谢!

顺便说一下，这是我的包裹。Json和angular。Json (idk也许你们需要观察这些)

{
"name": "myproject",
"version": "0.0.0",
"scripts": {
"ng": "ng",
"start": "ng serve",
"build": "ng build",
"watch": "ng build --watch --configuration development",
"test": "ng test"
},
"private": true,
"dependencies": {
"@angular/animations": "~12.1.1",
"@angular/cdk": "^12.2.0",
"@angular/common": "~12.1.1",
"@angular/compiler": "~12.1.1",
"@angular/core": "~12.1.1",
"@angular/forms": "~12.1.1",
"@angular/material": "^12.2.0",
"@angular/platform-browser": "~12.1.1",
"@angular/platform-browser-dynamic": "~12.1.1",
"@angular/router": "~12.1.1",
"bootstrap": "^4.5.3",
"ngx-bootstrap": "^7.0.0",
"rxjs": "~6.6.0",
"tslib": "^2.2.0",
"zone.js": "~0.11.4"
},
"devDependencies": {
"@angular-devkit/build-angular": "~12.1.1",
"@angular/cli": "~12.1.1",
"@angular/compiler-cli": "~12.1.1",
"@types/jasmine": "~3.6.0",
"@types/node": "^12.11.1",
"jasmine-core": "~3.7.0",
"karma": "~6.3.0",
"karma-chrome-launcher": "~3.1.0",
"karma-coverage": "~2.0.3",
"karma-jasmine": "~4.0.0",
"karma-jasmine-html-reporter": "^1.5.0",
"typescript": "~4.3.2"
}
}

angular.json

{
"$schema": "./node_modules/@angular/cli/lib/config/schema.json",
"cli": {
"analytics": "f6871353-1796-4510-ac5d-c072d98cf307"
},
"version": 1,
"newProjectRoot": "projects",
"projects": {
"myproject": {
"projectType": "application",
"schematics": {
"@schematics/angular:component": {
"style": "scss"
},
"@schematics/angular:application": {
"strict": true
}
},
"root": "",
"sourceRoot": "src",
"prefix": "app",
"architect": {
"build": {
"builder": "@angular-devkit/build-angular:browser",
"options": {
"outputPath": "dist/myproject",
"index": "src/index.html",
"main": "src/main.ts",
"polyfills": "src/polyfills.ts",
"tsConfig": "tsconfig.app.json",
"inlineStyleLanguage": "scss",
"assets": [
"src/favicon.ico",
"src/assets"
],
"styles": [
"src/styles.scss"
],
"scripts": []
},
"configurations": {
"production": {
"budgets": [
{
"type": "initial",
"maximumWarning": "500kb",
"maximumError": "1mb"
},
{
"type": "anyComponentStyle",
"maximumWarning": "2kb",
"maximumError": "4kb"
}
],
"fileReplacements": [
{
"replace": "src/environments/environment.ts",
"with": "src/environments/environment.prod.ts"
}
],
"outputHashing": "all"
},
"development": {
"buildOptimizer": false,
"optimization": false,
"vendorChunk": true,
"extractLicenses": false,
"sourceMap": true,
"namedChunks": true
}
},
"defaultConfiguration": "production"
},
"serve": {
"builder": "@angular-devkit/build-angular:dev-server",
"configurations": {
"production": {
"browserTarget": "myproject:build:production"
},
"development": {
"browserTarget": "myproject:build:development"
}
},
"defaultConfiguration": "development"
},
"extract-i18n": {
"builder": "@angular-devkit/build-angular:extract-i18n",
"options": {
"browserTarget": "myproject:build"
}
},
"test": {
"builder": "@angular-devkit/build-angular:karma",
"options": {
"main": "src/test.ts",
"polyfills": "src/polyfills.ts",
"tsConfig": "tsconfig.spec.json",
"karmaConfig": "karma.conf.js",
"inlineStyleLanguage": "scss",
"assets": [
"src/favicon.ico",
"src/assets"
],
"styles": [
"src/styles.scss"
],
"scripts": []
}
}
}
}
},
"defaultProject": "myproject"
}

Answer 1

所以没有HTTP请求但仍然得到No 'Access-Control-Allow-Origin' header is present on the requested resource.

在这种情况下:

1. 登录cPanel控制面板

2. 在FILES部分，点击File Manager选项。

3. 进入public_html文件夹

4. 从设置中显示隐藏文件。

5. 如果你有一个现有的.htaccess文件，你会在public_html文件夹中看到它。

6. 右键点击.htaccess文件，点击Edit菜单。

7. 添加以下行

   Header set Access-Control-Allow-Origin "*"

8. 保存。

如果在step 5中没有.htaccess:

5 - 1。点击左上角的新建文件选项。

5 - 2胜。在"新文件名:"字段中写入文件名为.htaccess，并单击Create New File按钮。

5 - 3。现在您可以编写或编辑.htaccess文件。(转到step 7)。

希望这能解决你的问题。

Answer 2

这是一个服务器错误，angular应用从哪里获取资源/数据。要解决这个问题，请转到后端代码库，并根据你使用的语言和框架，将angular应用部署到的域名添加到允许的主机列表中，你可以研究如何根据后端使用的语言或框架，添加允许的主机或安装cors包到项目中。

Answer 3

根据您使用的服务器，您需要允许发出请求的域向相关服务器发出请求。

要允许所有，你可以这样做"Access-Control-Allow-Origin"*">

"*";选项允许来自所有域的请求，您也可以指定特定的域。最好不要允许来自所有域的请求。

下面是我用Java编写并运行在Jetty Server上的一个旧项目的摘录。

return responseBuilder.header("Access-Control-Allow-Origin"， "*").build();