45 lines
1.5 KiB
Markdown
45 lines
1.5 KiB
Markdown
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---
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title: 'Solving "XML Parsing Error: no root element found" in Firefox'
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date: 2022-12-17T21:27:37-05:00
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toc: false
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images:
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tags:
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- dev
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- web
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---
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I've been seeing this error a lot while working on my project [Bulgur Cloud](/bulgur-cloud-intro/).
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It seems to show up only on Firefox:
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What is curious was that I was not actually loading the file mentioned in the
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error message. I tried looking up what the error might mean, but all that came
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up was very specific issues regarding some web frameworks, unrelated to what I'm
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using.
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I later realized however, while I wasn't loading the file in the error message,
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I was actually sending a `DELETE` request. The Bulgur Cloud server then responds
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to this request with an empty `200 OK` response. Turns out, if you send an empty
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response to Firefox, it tries to parse the body of the response even though it's
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empty and gives you this error.
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To quiet this error, I started just sending an empty JSON response even for
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requests that don't actually need it. Here's some rust code to illustrate the
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solution:
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```rust
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#[derive(Debug, Serialize)]
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pub struct EmptySuccess {
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status: &'static str,
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}
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// Using actix-web
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fn empty_ok_response() -> HttpResponse {
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HttpResponse::Ok().json(EmptySuccess { status: "ok"})
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}
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```
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This adds a `{"status": "ok"}` json to the response, which seems to be enough to
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make Firefox happy.
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