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Django is a high-level Python web framework that encourages rapid development and clean, pragmatic design. It is known for its 'batteries-included' approach, offering a wide array of features out of the box, such as an ORM, authentication, and an admin interface. Django is designed to help developers take applications from concept to completion as quickly as possible.
When working with Django, you might encounter the error: django.core.exceptions.SuspiciousOperation: Invalid HTTP_HOST header: 'host'.
This error typically occurs when the HTTP_HOST header in a request is deemed invalid or not allowed by Django's security settings.
When this error occurs, your Django application may fail to respond to requests, and you will see the error message in your server logs or in the browser if DEBUG mode is enabled.
The SuspiciousOperation
exception is raised by Django when it detects a potentially dangerous operation. In this case, the error is related to the HTTP_HOST
header, which is used to specify the domain name of the server. If the host specified in the request is not listed in the ALLOWED_HOSTS
setting, Django will raise this exception to prevent HTTP Host header attacks.
This issue often arises when deploying a Django application to a new server or domain, or when the application is accessed using an unexpected host name. It is a security measure to prevent HTTP Host header attacks, which can be used to poison caches and manipulate server behavior.
To resolve this issue, you need to ensure that the host specified in the request is included in the ALLOWED_HOSTS
setting in your Django project's settings.py
file.
settings.py
file.ALLOWED_HOSTS
setting. It is a list that specifies the host/domain names that your Django site can serve.ALLOWED_HOSTS
list. For example, if the error mentions 'example.com', your setting should look like this:ALLOWED_HOSTS = ['example.com', 'yourdomain.com']
For more information on the ALLOWED_HOSTS
setting, refer to the official Django documentation.
After updating the ALLOWED_HOSTS
setting, restart your Django server to apply the changes. Test the application by accessing it through the host name you added to ensure the error is resolved.
For further reading on Django security practices, consider visiting the Django Security Guide. This guide provides comprehensive information on securing your Django applications.
(Perfect for DevOps & SREs)
(Perfect for DevOps & SREs)