Cloud Native Catalog
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HTTP Auth
FILTER001
HTTP AUTH
What this filter does
Simulates handling authentication of requests at proxy level. Requests with a header token with value hello are accepted as authorized while the rest unauthorized. The actual authentication is handled by the Upstream server. Whenever the proxy recieves a request it extracts the token header and makes a request to the Upstream server which validates the token and returns a response.
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Test:
curl -H "token":"hello" 0.0.0.0:18000 -v # Authorized
curl -H "token":"world" 0.0.0.0:18000 -v # Unauthorized
Technologies
TCP Metrics
FILTER002
TCP METRICS
What this filter does
Collects simple metrics for every TCP packet and logs it.
...read moreCaveats and Considerations
Test:curl 0.0.0.0:18000 -v -d "request body"
Check the logs for the metrics.
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TCP Packet Parse
FILTER003
TCP PACKET PARSE
What this filter does
Parses the contents of every TCP packet the proxy receives and logs it.
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Test:curl 0.0.0.0:18000 -v -d "request body"
Check the logs for the packet contents.
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Singleton HTTP Call
FILTER004
SINGLETON HTTP CALL
What this filter does
The filter is responsible for intercepting HTTP requests, authorizing them based on the stored cache, and performing rate limiting. In the context of the envoy, this component is an HTTP filter and gets executed in the worker threads. For each request, a context object gets created.
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Metrics Store
FILTER005
METRICS STORE
What this filter does
This example showcases communication between a WASM filter and a service via shared queue. It combines the `Singleton-HTTP-Call` and `TCP-Metrics` examples. The filter collects metrics and enqueues it onto the queue while the service dequeues it and sends it to upstream server where it is stored.
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Test:curl 0.0.0.0:18000 -v -d "request body" # make a few of these callscurl 0.0.0.0:8080/retrieve -v # Retrieves the stored stats
# x | y | z === x : downstream bytes, y : upstream bytes, z: the latency for application server to respond
Technologies
Singleton Queue
FILTER006
SINGLETON QUEUE
What this filter does
An example which depicts an singleton HTTP WASM service which does an HTTP call once every 2 seconds.
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Check the logs for the response of the request.
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JWT Filter
FILTER007
JWT FILTER
What this filter does
Sample configuration to be passed:{
"add_header": [
["header1","value1"],
["header2","value2"]
],
"del_header":[
"header1"
],
"add_payload": [
["payload1","value1"],
["payload2","value2"],
],
"del_payload":[
"payload1"
],
"payload_to_header": [
"payload2"
],
"header_to_payload": [
"header2"
]
}
Caveats and Considerations
DISCLAIMER: This filter doesn't regenerate the signature of the modified JWT, and provides no protections. Proceed with caution.
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