Exploring Cancer...

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 More than a blog, these are the notes that I have generated using ChatGPT while I was exploring Cancer. I asked a couple of questions to ChatGPT and adding them here. What is Cancer? Cancer is a disease that occurs when there is abnormal growth or division of cells in the body. These cells can form tumors, invade surrounding tissues, and spread to other parts of the body. Cancer can occur in any part of the body and can develop in any organ. Cancer can be treated in several ways, depending on the type and stage of the disease, as well as the overall health of the patient. Some common treatments include surgery, chemotherapy, radiation therapy, and immunotherapy. Surgery involves the removal of cancerous tissue and is often the first step in treatment. Chemotherapy uses drugs to kill cancer cells and is often used in combination with other treatments. Radiation therapy uses high-energy radiation to kill cancer cells. Immunotherapy uses drugs to help the body's immune system fight t

Azure API Management - Using Client IP Address as the Counter Key for Rate Limiting Policies

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Hey friends, How are you all?

Today, I am going to share how we can implement Rate Limit Policies and Counter by Client IP Address.

So, let's understand the problem first:

PROBLEM: 

  • We need to implement Rate Limit Policy by Client IP Address on Azure API Management. I followed this article first of all and found that I can use the following piece of code.


  • There was a second problem for me as the requests were coming through cloudflare and hence the client IP address was not available in context.Request.IpAddress

SOLUTION:
  • I was getting IPAddress as 0.0.0.0 in the app insights which is right as per GDPR, I used this link to confirm the client IP address in the pre-prod environments in App Insights.
  • I found that CloudFlare exposes the Client IP Address in the X-Forwarded-For or True-Client-IP Header to expose the client IP Address. Check out the details here.
  • I followed this link to strengethen my understanding on how to use Policy Expressions
  • The final piece: Ultimately, I used the following piece to counter by Client IP Address


Notice, the code in the counter-key, it is prettymuch C# in the razor block. For a single line statement, you can use @() and for multi-line statements, you can use Happy Coding!!!