fix(azure): raw body no longer returns parsed json

[tobiasdiez]

🔗 Linked issue

None

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Azure functions with httpTrigger automatically JSON-parse the body. This is not explicitly mentioned in the docs (at least I couldn't find it), but in one of the examples they use req.body.name showing that req.body is indeed an object. This then leads to problems when used with h3's useRawBody method, which actually returns the object instead of the stringy body when deployed to azure.

This is fixed by using req.rawBody in the azure handler. It's hard to find documentation on this property, but rawBody is used in an official test file:
https://github.com/Azure/azure-functions-host/blob/71ecbb2c303214f96d7e17310681fd717180bdbb/test/WebJobs.Script.Tests.Integration/TestScripts/Node/HttpTrigger/index.js#L13

Example console.log(req) in the handler:

....
[api] [2022-10-16T13:33:53.998Z]   body: {
[api] [2022-10-16T13:33:53.998Z]     query: 'query MeE2ENotLoggedIn {\n  me {\n    id\n  }\n}',
[api] [2022-10-16T13:33:53.998Z]     operationName: 'MeE2ENotLoggedIn'
[api] [2022-10-16T13:33:53.998Z]   },
[api] [2022-10-16T13:33:53.998Z]   rawBody: '{"query":"query MeE2ENotLoggedIn {\\n  me {\\n    id\\n  }\\n}","operationName":"MeE2ENotLoggedIn"}'
....

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[codecov]

Codecov Report

Merging #589 (216cd9b) into main (6d4b416) will not change coverage.
The diff coverage is n/a.

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  Misses       1389     1389           
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[danielroe]

Thanks for finding! ❤️

[brendonmatos]

@danielroe Hi!
Should useRawBody always return the body in string?

if yes, the same is happening in cloudflare deploys