In azure container app, azure seems to remove removes forward slash / from URL

Question

couchdb on azure container seems to have issue with azure forward slash /

When saving simple json in couchdb, azure seems to remove forward slash / in URL
Example when saving below json:
{ "_id": "https://jenkins-url.com/apache/couchdb/issues", "data": { } }
azure:
PUT /db/https%3A/jenkins-url.com/apache/couchdb/issues 201

couchdb on-prem:
PUT /db/https%3A%2F%2Fjenkins-url.com%2Fapache%2Fcouchdb%2Fissues 201

Notice that azure service removes / from URL

Answer 1

When using CouchDB on Azure Container Apps, you may notice that forward slashes (/) in the _id field are unintentionally removed. This happens because Azure automatically decodes URL-encoded characters, converting %2F into / before passing the request to the application.

In case of on-prem, this behavior does not occur because the encoded slashes remain untouched, allowing the id to be stored correctly. Azure has a setting called AZURE_CONTAINER_APP_INGRESS_DECODE_URL. Set this to false to prevent automatic URL decoding.

az containerapp update \

  --name couchdb-app \

  --resource-group arkorg \

  --set-env-vars AZURE_CONTAINER_APP_INGRESS_DECODE_URL=false
```![enter image description here](https://i.imgur.com/WgJgvzy.png)

After making the changes, send a test request to CouchDB and check if `_id` is stored correctly:

```yaml

curl -k -X PUT "https://couchdb-app.agreeablepebble-2fc967be.centralindia.azurecontainerapps.io/db/https%3A%2F%2Fjenkins-url.com%2Fapache%2Fcouchdb%2Fissues" \

  -u admin:admin123 \

  -H "Content-Type: application/json" \

  -d '{ "data": {} }'

If Azure continues to decode encoded slashes despite disabling AZURE_CONTAINER_APP_INGRESS_DECODE_URL, the best workaround is double encoding which I already suggested in comment is to use double encoding (%252F instead of %2F) .

Checkout- Azure Container App URL Decoding Issue

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