【已解决】已拦截跨域请求：同源策略禁止读取位于接口的远程资源：原因：CORS缺少Access

2023-09-04 01:15| 来源: 网络整理| 查看: 265

前后端开发跨域问题 1 问题记录2 前端2.1新手配置：有问题2.1.1纠错处：2.1.2注意 2.2老手配置：正常 3 后端3.1新手配置：有问题3.1.1纠错处：3.1.2注意 3.2老手配置：正常 4 总结有用请留下你的足迹，让更多人的人看到，谢谢

1 问题记录

今天笔者有一次遇到前后端跨域问题，下面小编详细的记录下整个过程：环境是：后端在公司，前端在远程，两人协同开发后端写好接口，并发布在外网后，接下来就是远程前端的对接接口阶段，前端在配置接口时，配置成功，在测试访问时，浏览器报“已拦截跨域请求：同源策略禁止读取位于接口的远程资源：原因：CORS缺少Access-Contorl-Allow-Origin”问题，错误提示是“cors跨域问题”，后端看到只接受到了预请求，此刻，两者都不确定是谁的问题，都着手解决这个问题，好了，小编暂时代替他配合后端联调，首先用之前已经正常的登录界面来配合他来联调，联调时，还是出现相同的问题，此时判断出是后端请求规则配置有问题。解决方法本篇文章后面会记录。待后端解决后，我两联调正常后，接下来就是远程前端和后端的联调，结果调试还是出现问题，说明此刻问题是前端的配置有问题，果不其然，小编将自己的main.js文件配置给他后，解决啦，问题到此结束，下面将详细记录解决方案！！

2 前端 2.1新手配置：有问题 import Vue from 'vue' import App from './App.vue' import axios from 'axios' import router from './router' import store from './store' Vue.config.productionTip = false Vue.prototype.$axios = axios Vue.prototype.$http = axios // 全局挂载axios const base_url = 'httt://117.xx.xx.198:1024/' axios.defaults.baseURL = base_url axios.defaults.headers.post['Content-Type'] = 'application/json;charset=utf-8' / new Vue({ router, store, render: h => h(App), }).$mount('#app') 错误 2.1.1纠错处： axios其全局定义两次，去掉或注释一个main.js文件中axios的引入应在store引入之后，位置不对 2.1.2注意

了解引入的规则，一般的自己写的js或者json文件引入时，写到原有引入文件的后面。写代码的，没有一个不知道代码是自上而下运行的，因此自写的文件引入在原引入文件之前，那就是你的文件先运行，你的文件运行的内部代码逻辑就会跑偏。

2.2老手配置：正常 import Vue from 'vue' import App from './App.vue' import router from './router' import store from './store' // import elementui from 'element-ui' // import "element-ui/lib/theme-chalk/index.css" //element ui样式 import axios from 'axios' Vue.config.productionTip = false // Vue.use(elementui) Vue.prototype.$http = axios // const base_url = '' const base_url = 'http://117.xx.xx.198:1024' axios.defaults.baseURL = base_url localStorage.setItem('base_url', base_url) axios.defaults.headers.post['Content-Type'] = 'application/json;charset=utf-8' new Vue({ router, store, render: h => h(App) }).$mount('#app') 3 后端

后端是python写的，配置于setting.py文件中

3.1新手配置：有问题 """ Django settings for Project project. Generated by 'django-admin startproject' using Django 3.1.13. For more information on this file, see https://docs.djangoproject.com/en/3.1/topics/settings/ For the full list of settings and their values, see https://docs.djangoproject.com/en/3.1/ref/settings/ """ import os from pathlib import Path # Build paths inside the project like this: BASE_DIR / 'subdir'. BASE_DIR = Path(__file__).resolve().parent.parent # Quick-start development settings - unsuitable for production # See https://docs.djangoproject.com/en/3.1/howto/deployment/checklist/ # SECURITY WARNING: keep the secret key used in production secret! SECRET_KEY = 'evwet_y=%^7$b)r3o9we47^5h&@_)ekojx5v+tlh!$tgo)$5ux' # SECURITY WARNING: don't run with debug turned on in production! DEBUG = True ALLOWED_HOSTS = ['*'] # Application definition INSTALLED_APPS = [ 'django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', '_____________', #缺少cors的headers配置导入 'django.contrib.staticfiles', 'user', 'rest_framework', 'devices' ] MIDDLEWARE = [ 'django.middleware.security.SecurityMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.common.CommonMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', '______________________________________', #缺少一个cors的中间件 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware', 'django.middleware.clickjacking.XFrameOptionsMiddleware', ] ROOT_URLCONF = 'Project.urls' TEMPLATES = [ { 'BACKEND': 'django.template.backends.django.DjangoTemplates', 'DIRS': [os.path.join(BASE_DIR, 'templates')] , 'APP_DIRS': True, 'OPTIONS': { 'context_processors': [ 'django.template.context_processors.debug', 'django.template.context_processors.request', 'django.contrib.auth.context_processors.auth', 'django.contrib.messages.context_processors.messages', ], }, }, ] WSGI_APPLICATION = 'StudentCourseSelection.wsgi.application' # Database # https://docs.djangoproject.com/en/3.1/ref/settings/#databases DATABASES = { 'default': { 'ENGINE': 'django.db.backends.sqlite3', 'NAME': BASE_DIR / 'db.sqlite3', } } # Password validation # https://docs.djangoproject.com/en/3.1/ref/settings/#auth-password-validators AUTH_PASSWORD_VALIDATORS = [ { 'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator', }, { 'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator', }, { 'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator', }, { 'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator', }, ] # Internationalization # https://docs.djangoproject.com/en/3.1/topics/i18n/ LANGUAGE_CODE = 'zh-Hans' TIME_ZONE = 'UTC' USE_I18N = True USE_L10N = True USE_TZ = True # Static files (CSS, JavaScript, Images) # https://docs.djangoproject.com/en/3.1/howto/static-files/ STATIC_URL = '/static/' 3.1.1纠错处： INSTALLED_APPS 处配置不全，加上 corsheadersMIDDLEWARE 中应配置 corsheaders.middleware.CorsMiddleware 3.1.2注意

问题定位，是否遗漏

3.2老手配置：正常 """ Django settings for Project project. Generated by 'django-admin startproject' using Django 3.1.13. For more information on this file, see https://docs.djangoproject.com/en/3.1/topics/settings/ For the full list of settings and their values, see https://docs.djangoproject.com/en/3.1/ref/settings/ """ import os from pathlib import Path # Build paths inside the project like this: BASE_DIR / 'subdir'. BASE_DIR = Path(__file__).resolve().parent.parent # Quick-start development settings - unsuitable for production # See https://docs.djangoproject.com/en/3.1/howto/deployment/checklist/ # SECURITY WARNING: keep the secret key used in production secret! SECRET_KEY = 'evwet_y=%^7$b)r3o9we47^5h&@_)ekojx5v+tlh!$tgo)$5ux' # SECURITY WARNING: don't run with debug turned on in production! DEBUG = True ALLOWED_HOSTS = ['*'] # Application definition INSTALLED_APPS = [ 'django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'corsheaders', ##################### 'django.contrib.staticfiles', 'user', 'rest_framework', 'devices' ] MIDDLEWARE = [ 'django.middleware.security.SecurityMiddleware', 'django.contrib.sessions.middleware.SessionMiddleware', 'django.middleware.common.CommonMiddleware', 'django.middleware.csrf.CsrfViewMiddleware', 'corsheaders.middleware.CorsMiddleware', ################ 'django.contrib.auth.middleware.AuthenticationMiddleware', 'django.contrib.messages.middleware.MessageMiddleware', 'django.middleware.clickjacking.XFrameOptionsMiddleware', ] ROOT_URLCONF = 'Project.urls' TEMPLATES = [ { 'BACKEND': 'django.template.backends.django.DjangoTemplates', 'DIRS': [os.path.join(BASE_DIR, 'templates')] , 'APP_DIRS': True, 'OPTIONS': { 'context_processors': [ 'django.template.context_processors.debug', 'django.template.context_processors.request', 'django.contrib.auth.context_processors.auth', 'django.contrib.messages.context_processors.messages', ], }, }, ] WSGI_APPLICATION = 'StudentCourseSelection.wsgi.application' # Database # https://docs.djangoproject.com/en/3.1/ref/settings/#databases DATABASES = { 'default': { 'ENGINE': 'django.db.backends.sqlite3', 'NAME': BASE_DIR / 'db.sqlite3', } } # Password validation # https://docs.djangoproject.com/en/3.1/ref/settings/#auth-password-validators AUTH_PASSWORD_VALIDATORS = [ { 'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator', }, { 'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator', }, { 'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator', }, { 'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator', }, ] # Internationalization # https://docs.djangoproject.com/en/3.1/topics/i18n/ LANGUAGE_CODE = 'zh-Hans' TIME_ZONE = 'UTC' USE_I18N = True USE_L10N = True USE_TZ = True # Static files (CSS, JavaScript, Images) # https://docs.djangoproject.com/en/3.1/howto/static-files/ STATIC_URL = '/static/' 4 总结

小编觉得工作上，出现问题，要及时配合处理，做到更好、更快的解决问题，告诫大家的同时也是告诫我自己，要认真仔细，对待代码也是如此，相信大家也经常会因为一个字母而引发的问题吧，你只需要认真即可。

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