I am trying to login to my back-end written in django-rest-framework from my frontend written in Angular 7. Whenever I tries to login, I gets an error
Access to XMLHttpRequest at 'http://localhost:8000/api-auth/login' from origin 'http://localhost:4200' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: Redirect is not allowed for a preflight request.
When I tried the same API from postman, I got another error -
CSRF verification failed. Request aborted.
I am not sure how to include csrf token in my app to resolve this error.
my login.html
<form [formGroup]="loginForm" (ngSubmit)="login()">
<div class="row">
<div class="col-md-12 align-content-center py-3">
<mat-form-field>
<input matInput placeholder="Enter your username" formControlName="loginUsername">
</mat-form-field>
</div>
<div class="col-md-12 align-content-center py-3">
<mat-form-field>
<input matInput placeholder="Enter your password" type="password" formControlName="loginPassword">
</mat-form-field>
</div>
<div class="col-md-12 align-content-center py-3">
<button mat-raised-button type="submit">Login</button>
</div>
</div>
</form>
and login.serivce file is as follows:
import {HttpClient, HttpHeaders} from '@angular/common/http';
import {Injectable} from '@angular/core';
export interface Login {
username: string;
password: string;
}
export interface Signup {
username: string;
email: string;
password: string;
}
@Injectable()
export class LoginSignUpService {
loginObject: Login;
signupObject: Signup;
constructor(private http: HttpClient) {
}
public login(username: string, password: string) {
this.loginObject = {
username, password
};
const headers = new HttpHeaders();
headers.append('Content-Type', 'application/json');
headers.append('Accept', 'application/json');
headers.append('Access-Control-Allow-Headers', 'Content-Type');
headers.append('Access-Control-Allow-Origin', 'http://localhost:4200');
const options = {headers};
return this.http.post('http://localhost:8000/api-auth/login', this.loginObject, options);
}
}
On my server side, my settings.py file is as follows:
"""
Django settings for atest_blog project.
Generated by 'django-admin startproject' using Django 2.1.7.
For more information on this file, see
https://docs.djangoproject.com/en/2.1/topics/settings/
For the full list of settings and their values, see
https://docs.djangoproject.com/en/2.1/ref/settings/
"""
import os
# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/2.1/howto/deployment/checklist/
# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = 'ct9jv$%i%h336p40#)bus7!eu2$@%e%o#w47*<ccl%@#(z$q'
# 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',
'django.contrib.staticfiles',
'atest.apps.AtestConfig',
'rest_framework',
'rest_framework.authtoken',
'comments.apps.CommentsConfig',
'corsheaders'
]
MIDDLEWARE = [
'django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware',
'corsheaders.middleware.CorsMiddleware',
'django.middleware.common.BrokenLinkEmailsMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
]
ROOT_URLCONF = 'atest_blog.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 = 'atest_blog.wsgi.application'
# REST_FRAMEWORK = {
# 'DEFAULT_AUTHENTICATION_CLASSES': (
# 'rest_framework.authentication.TokenAuthentication',
# ),
# 'DEFAULT_PERMISSION_CLASSES': (
# 'atest.permissions.IsOwnerOrReadOnly',
# ),
# }
# Database
# https://docs.djangoproject.com/en/2.1/ref/settings/#databases
DATABASES = {
'default': {
'ENGINE': '*******************',
'NAME': '***************',
'USER': '***************',
'PASSWORD': '**************************',
'HOST': '**************************',
'PORT': '',
}
}
# Password validation
# https://docs.djangoproject.com/en/2.1/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/2.1/topics/i18n/
LANGUAGE_CODE = 'en-us'
TIME_ZONE = 'UTC'
USE_I18N = True
USE_L10N = True
USE_TZ = True
# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/2.1/howto/static-files/
STATIC_URL = '/static/'
CORS_ORIGIN_ALLOW_ALL = True
# CORS_ORIGIN_WHITELIST = (
# 'http//:localhost:4200',
# )
I have also added corsheaders in my server as I was facing the CORS issue earlier and it resolved my issue for CORS for other page.
Please help me resolving this.
