JUN/CAMROM-008: feat: add generating QR - #241
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Previously, our rate-limiting code trusted the entire `X-Forwarded-For` header, allowing a malicious client to spoof that header and evade rate-limiting. This commit introduces a new module and setting allowing us to make a more conservative choice of IPs. - Create new `openedx.core.djangoapps.util.ip` module for producing the IP "external chain" for requests based on the XFF header and the REMOTE_ADDR. - Include a function that gives the safest choice of IPs. - Add new setting `CLOSEST_CLIENT_IP_FROM_HEADERS` for configuring how the external chain is derived (i.e. setting the trust boundary). Currently has a default, but we may want to make it mandatory in the future. - Change `django-ratelimit` code to use the proximate IP in the external chain -- the one just outside the trust boundary. Also: - Change `XForwardedForMiddleware` to use more conservative choice for its `REMOTE_ADDR` override - Other adjustments to `XForwardedForMiddleware` as needed in order to initialize new module and support code that needs the real `REMOTE_ADDR` value - Metrics for observability into the change (and XFF composition) - Feature switch to restore legacy mode if needed This also gives us a path forward to removing use of the django-ipware package, which is no longer maintained and has a handful of bugs that make it difficult to use safely. Internal ticket: ARCHBOM-2056
MaferMazu
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Previously, our rate-limiting code trusted the entire `X-Forwarded-For` header, allowing a malicious client to spoof that header and evade rate-limiting. This commit introduces a new module and setting allowing us to make a more conservative choice of IPs. - Create new `openedx.core.djangoapps.util.ip` module for producing the IP "external chain" for requests based on the XFF header and the REMOTE_ADDR. - Include a function that gives the safest choice of IPs. - Add new setting `CLOSEST_CLIENT_IP_FROM_HEADERS` for configuring how the external chain is derived (i.e. setting the trust boundary). Currently has a default, but we may want to make it mandatory in the future. - Change `django-ratelimit` code to use the proximate IP in the external chain -- the one just outside the trust boundary. Also: - Change `XForwardedForMiddleware` to use more conservative choice for its `REMOTE_ADDR` override - Other adjustments to `XForwardedForMiddleware` as needed in order to initialize new module and support code that needs the real `REMOTE_ADDR` value - Metrics for observability into the change (and XFF composition) - Feature switch to restore legacy mode if needed This also gives us a path forward to removing use of the django-ipware package, which is no longer maintained and has a handful of bugs that make it difficult to use safely. Internal ticket: ARCHBOM-2056 Backported from a251d18
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This allows a QR code to be generated with the plugin and corresponds to issue CAMROM-008 from this list