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added http handler to limitations section #1874

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Nov 20, 2024
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added http handler to limitations section #1874

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1 change: 1 addition & 0 deletions networking/dynamic-request-routing.html.markerb
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Expand Up @@ -16,7 +16,7 @@

Apps may append a `fly-replay` header to responses. This instructs [Fly Proxy](/docs/reference/fly-proxy) to redeliver (replay) the original request in another region, or to replay it to another app in the same organization.

<%= youtube "https://www.youtube.com/watch?v=riCh9Xeuf0s" %>

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GitHub Actions / Vale linter 

[vale] reported by reviewdog 🐶
[Fly.Spelling] Is 'youtube' a typo?

Raw Output:
{"message": "[Fly.Spelling] Is 'youtube' a typo?", "location": {"path": "networking/dynamic-request-routing.html.markerb", "range": {"start": {"line": 19, "column": 5}}}, "severity": "INFO"}

The content of the `fly-replay` header fields tells Fly Proxy which magic to perform, and the proxy takes it from there. If the target region doesn't host any healthy Machines for the target app, the proxy throws an error.

Expand All @@ -36,6 +36,7 @@

If you can perform uploads via `fetch` or `XMLHttpRequest`, you can prepend the [fly-prefer-region](#the-fly-prefer-region-request-header) or [fly-force-instance-id](#the-fly-force-instance-id-request-header) header to send the request directly to a specific region.

Your app should use the [http handler](/docs/networking/services/#http-handler) in order to use fly-replay.

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GitHub Actions / Vale linter 

[vale] reported by reviewdog 🐶
[Fly.Spelling] Is 'http' a typo?

Raw Output:
{"message": "[Fly.Spelling] Is 'http' a typo?", "location": {"path": "networking/dynamic-request-routing.html.markerb", "range": {"start": {"line": 39, "column": 26}}}, "severity": "INFO"}

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GitHub Actions / Vale linter 

[vale] reported by reviewdog 🐶
[Fly.WordList] Consider using 'to' instead of 'in order to'.

Raw Output:
{"message": "[Fly.WordList] Consider using 'to' instead of 'in order to'.", "location": {"path": "networking/dynamic-request-routing.html.markerb", "range": {"start": {"line": 39, "column": 81}}}, "severity": "INFO"}

## `fly-replay` use cases

Expand Down Expand Up @@ -129,5 +130,5 @@
```

<div class="note icon">
**Note**: The value of this header is the Machine ID, which you can get by running `fly status` or `fly machines list`.

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GitHub Actions / Vale linter 

[vale] reported by reviewdog 🐶
[Fly.Machine] Use 'Machines' instead of 'machines'.

Raw Output:
{"message": "[Fly.Machine] Use 'Machines' instead of 'machines'.", "location": {"path": "networking/dynamic-request-routing.html.markerb", "range": {"start": {"line": 133, "column": 104}}}, "severity": "INFO"}
</div>
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