【发布时间】:2021-11-26 22:28:12
【问题描述】:
我在 EC2 Django + Nginx 服务器上遇到了 CORS 错误。不知道为什么它永远不起作用。
错误:
Access to fetch at 'https://serveraddress/api/v1/user' from origin 'http://localhost:19006' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.
我是如何要求的
fetch(`https://${env.apiUrl}/api/v1/user`, {
method: "GET",
mode: "cors",
withCredentials: true,
headers: {
"Access-Control-Allow-Origin": "*",
"Access-Control-Allow-Headers":
"Origin, X-Requested-With, Content-Type, Accept",
"Access-Control-Allow-Methods":"GET,PUT,POST,DELETE,OPTIONS",
"Access-Control-Allow-Credentials":'true',
Authorization: await getToken(),
},
还尝试使用授权标头或请求获取,不需要发布请求身份验证,但它们都不起作用。 另外,使用 axios、xmlhttprequest 进行了尝试,但都没有工作..
以下是 Nginx + Django 的设置
Nginx 设置
location / {
proxy_hide_header Access-Control-Allow-Origin;
add_header Access-Control-Allow-Origin '*';
add_header Access-Control-Allow-Credentials true always;
proxy_pass http://web/;
proxy_redirect off;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
Django 设置
包括 django-cors-headers 中间件在内的 cors 的所有设置,并将 corsheaders.middleware.CorsMiddleware 放在上面。
MIDDLEWARE = [
'corsheaders.middleware.CorsMiddleware',
'django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
....
]
CORS_ORIGIN_ALLOW_ALL = True
ALLOWED_HOSTS = ['*']
CORS_ALLOW_CREDENTIALS = True
CORS_ALLOW_METHODS = [
'DELETE',
'GET',
'OPTIONS',
'PATCH',
'POST',
'PUT',
]
CORS_ALLOW_HEADERS = [
'accept',
'accept-encoding',
'authorization',
'content-type',
'dnt',
'origin',
'user-agent',
'x-csrftoken',
'x-requested-with',
]
CORS_ALLOWED_ORIGIN_REGEXES = [
r"^https://\w+\.domain\.com$",
]
CSRF_TRUSTED_ORIGINS = ['*']
CORS_ALLOWED_ORIGINS = ['*']
还使用 curl 选项检查了预检消息并获得了
curl --verbose --request OPTIONS 'https://serveraddress/api/v1/user/profile' --header 'Origin: https://localhost:19006' --header 'Access-Control-Request-Headers: Origin, Accept, Content-Type' --header 'Access-Control-Request-Method: GET'
它可以在 Android 或 iOS 上找到,但它不能在网络上运行。
我发现 React 也有类似的问题,但是可以通过 http-proxy-middleware 或在 package.json 上添加代理来解决。
https://create-react-app.dev/docs/proxying-api-requests-in-development/
但似乎我无法为 react native web 设置代理。
【问题讨论】:
-
你能不能试试把这个加到nginx
add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS'; -
@yedpodtrzitko 感谢您的评论!我刚刚尝试过,但没有成功。