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Fix missing content-length header when fetching assets #961

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byCedric
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Summary

This PR relates to PR #953 and adds the Content-Length property when loading assets.

While this isn't mandatory for the apps, it's extremely useful for some debugging possibilities. At Expo, we are working on debugging improvements through Chrome DevTools, and one of these improvements is adding support for the Network inspector.

On the native side, we are limited to what we can infer automatically. One of these limitations is intercepting response bodies. We can't intercept these response bodies if it's larger than 1mb, and because of that, we rely on the Content-Length header to communicate the size of the response.

Test plan

image

I can provide a repository to try this debugger, if it's necessary. You can also test this change by manually loading an existing asset (e.g. http://localhost/assets/icon.png?platform=android) and check the response headers in the same debugger.

@facebook-github-bot facebook-github-bot added the CLA Signed This label is managed by the Facebook bot. Authors need to sign the CLA before a PR can be reviewed. label Mar 30, 2023
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@huntie has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

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Looks good to me, thanks!

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@huntie merged this pull request in 4002576.

@byCedric byCedric deleted the @bycedric/metro/add-asset-content-length-header branch March 31, 2023 11:25
fuxingloh pushed a commit to levaintech/keychain that referenced this pull request Jun 20, 2023
[![Mend
Renovate](https://app.renovatebot.com/images/banner.svg)](https://renovatebot.com)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [metro](https://togithub.com/facebook/metro) | [`0.76.0` ->
`0.76.6`](https://renovatebot.com/diffs/npm/metro/0.76.0/0.76.6) |
[![age](https://badges.renovateapi.com/packages/npm/metro/0.76.6/age-slim)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://badges.renovateapi.com/packages/npm/metro/0.76.6/adoption-slim)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://badges.renovateapi.com/packages/npm/metro/0.76.6/compatibility-slim/0.76.0)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://badges.renovateapi.com/packages/npm/metro/0.76.6/confidence-slim/0.76.0)](https://docs.renovatebot.com/merge-confidence/)
|
| [metro-resolver](https://togithub.com/facebook/metro) | [`0.76.0` ->
`0.76.6`](https://renovatebot.com/diffs/npm/metro-resolver/0.76.0/0.76.6)
|
[![age](https://badges.renovateapi.com/packages/npm/metro-resolver/0.76.6/age-slim)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://badges.renovateapi.com/packages/npm/metro-resolver/0.76.6/adoption-slim)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://badges.renovateapi.com/packages/npm/metro-resolver/0.76.6/compatibility-slim/0.76.0)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://badges.renovateapi.com/packages/npm/metro-resolver/0.76.6/confidence-slim/0.76.0)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>facebook/metro</summary>

###
[`v0.76.6`](https://togithub.com/facebook/metro/releases/tag/v0.76.6)

[Compare
Source](https://togithub.com/facebook/metro/compare/v0.76.5...v0.76.6)

- **\[Types]** Update config and `Server` types to use broader types
from `connect` package
(facebook/metro@d20d7c8
by [@&#8203;huntie](https://togithub.com/huntie))
- **\[Types]** Fix TypeScript name for `createConnectMiddleware` export
(facebook/metro@06682f8
by [@&#8203;huntie](https://togithub.com/huntie))
- **\[Deprecation]** Deprecate `server.enhanceMiddleware` option
(facebook/metro@22e85fd
by [@&#8203;huntie](https://togithub.com/huntie))

> NOTE: Experimental features are not covered by semver and can change
at any time.

- **\[Experimental]** Add `unstable_extraMiddleware` option to
`runServer` API
(facebook/metro@d0d5543
by [@&#8203;huntie](https://togithub.com/huntie))

**Full Changelog**:
facebook/metro@v0.76.5...v0.76.6

###
[`v0.76.5`](https://togithub.com/facebook/metro/releases/tag/v0.76.5)

[Compare
Source](https://togithub.com/facebook/metro/compare/v0.76.4...v0.76.5)

- **\[Feature]** Support URLs for both bundling and symbolication
requests using `//&` instead of `?` as a query string delimiter
(facebook/metro@bd357c8
by [@&#8203;robhogan](https://togithub.com/robhogan))
- **\[Fix]** Fix crash on a module added+modified+removed between
updates
(facebook/metro@5d7305e
by [@&#8203;robhogan](https://togithub.com/robhogan))
- **\[Fix]** Fix missed modification on module removed+modified+added
between updates
(facebook/metro@5d7305e
by [@&#8203;robhogan](https://togithub.com/robhogan))
- **\[Fix]** Emit source URLs in a format that will not be stripped by
JavaScriptCore
(facebook/metro@bce6b27ef8ac7c41e0a3e990eb71747cc0e6f606by
[@&#8203;robhogan](https://togithub.com/robhogan))
- **\[Performance]** Prune unmodified modules from delta updates before
sending them to the client
(facebook/metro@e24c6ae
by [@&#8203;robhogan](https://togithub.com/robhogan))

> NOTE: Experimental features are not covered by semver and can change
at any time.

- **\[Experimental]** Fix `babel/runtime` issue when using Package
Exports
(facebook/metro@905d773
by [@&#8203;huntie](https://togithub.com/huntie))

**Full Changelog**:
facebook/metro@v0.76.4...v0.76.5

###
[`v0.76.4`](https://togithub.com/facebook/metro/releases/tag/v0.76.4)

[Compare
Source](https://togithub.com/facebook/metro/compare/v0.76.3...v0.76.4)

- **\[Feature]**: Support the
[`x_google_ignoreList`](https://developer.chrome.com/articles/x-google-ignore-list/)
source map extension.
([facebook/metro#973,
[`82bd64a`](https://togithub.com/facebook/metro/commit/82bd64a9720174a9e2a02fb73bbef292153e20f1)
by [@&#8203;motiz88](https://togithub.com/motiz88))
- **\[Feature]**: Support bundling KTX files as image assets.
([facebook/metro#975
by [@&#8203;rshest](https://togithub.com/rshest))
- **\[Fix]**: Fix crash on a module added+modified+removed between
updates.
([`5d7305e`](https://togithub.com/facebook/metro/commit/5d7305e2f3a9f5f4aebc889a452afb03b1db12a7)
by [@&#8203;robhogan](https://togithub.com/robhogan))
- **\[Fix]**: Fix missed modification on module removed+modified+added
between updates.
([`5d7305e`](https://togithub.com/facebook/metro/commit/5d7305e2f3a9f5f4aebc889a452afb03b1db12a7)
by [@&#8203;robhogan](https://togithub.com/robhogan))

**Full Changelog**:
facebook/metro@v0.76.3...v0.76.4

###
[`v0.76.3`](https://togithub.com/facebook/metro/releases/tag/v0.76.3)

[Compare
Source](https://togithub.com/facebook/metro/compare/v0.76.2...v0.76.3)

- **\[Feature]**: Support custom `__loadBundleAsync` implementations in
the default `asyncRequire` function. See the [lazy bundling
RFC](https://togithub.com/react-native-community/discussions-and-proposals/blob/main/proposals/0605-lazy-bundling.md)
for more details.
(facebook/metro@ac3adce,
facebook/metro@f07ce5c
by [@&#8203;motiz88](https://togithub.com/motiz88))
- **\[Feature]**: Support `lazy` parameter in bundle requests. See the
[lazy bundling
RFC](https://togithub.com/react-native-community/discussions-and-proposals/blob/main/proposals/0605-lazy-bundling.md)
for more details.
(facebook/metro@4ef14f9
by [@&#8203;motiz88](https://togithub.com/motiz88))
- **\[Feature]**: Preserve comments in unminified builds, while
continuing to strip all comments from minified builds.
([facebook/metro#967
by [@&#8203;tido64](https://togithub.com/tido64))
- **\[Deprecated]**: The `transformer.asyncRequireModulePath` config
option is deprecated. Use
[`__loadBundleAsync`](https://togithub.com/react-native-community/discussions-and-proposals/blob/main/proposals/0605-lazy-bundling.md#\__loadbundleasync-in-metro)
instead.(facebook/metro@c7b684f
by [@&#8203;motiz88](https://togithub.com/motiz88))

> NOTE: Experimental features are not covered by semver and can change
at any time.

- **\[Experimental]** Package Exports unstable_conditionNames now
defaults to \['require', 'import']
(facebook/metro@e70ceef
by [@&#8203;huntie](https://togithub.com/huntie))
- **\[Experimental]** Removed `server.experimentalImportBundleSupport`
config option.
(facebook/metro@4ef14f9
by [@&#8203;motiz88](https://togithub.com/motiz88))

**Full Changelog**:
facebook/metro@v0.76.2...v0.76.3

###
[`v0.76.2`](https://togithub.com/facebook/metro/releases/tag/v0.76.2)

[Compare
Source](https://togithub.com/facebook/metro/compare/v0.76.1...v0.76.2)

- **\[Feature]**: Added customizeStack hook to Metro's `/symbolicate`
endpoint to allow custom frame skipping logic on a stack level.
(facebook/metro@ce266dd
by [@&#8203;GijsWeterings](https://togithub.com/GijsWeterings))
- **\[Feature]**: Re-export `metro-core`'s `Terminal` from `metro`.
(facebook/metro@86e3f93
by [@&#8203;robhogan](https://togithub.com/robhogan))
- **\[Feature]**: Re-export `metro-config`'s `resolveConfig` from
`metro`.
(facebook/metro@cc16664
by [@&#8203;robhogan](https://togithub.com/robhogan))
- **\[Types]**: Remove dependency on `@types/babel__code-frame`.
(facebook/metro@41cdc03
by [@&#8203;robhogan](https://togithub.com/robhogan))
- **\[Types]**: Remove dependency on `@types/ws`.
(facebook/metro@7deb525
by [@&#8203;robhogan](https://togithub.com/robhogan))
- **\[Types]**: Fix TypeScript types entry point for metro-source-map.
(facebook/metro@3238bbc
by [@&#8203;huntie](https://togithub.com/huntie))
- **\[Deprecated]**: Deprecate `ResolutionContext.getPackageForModule`.
(facebook/metro@2d0a01c
by [@&#8203;huntie](https://togithub.com/huntie))

> NOTE: Experimental features are not covered by semver and can change
at any time.

- **\[Experimental]**: Pass full path and query params to `asyncRequire`
for lazy bundles.
(facebook/metro@61a30b7
by [@&#8203;motiz88](https://togithub.com/motiz88))
- **\[Experimental]**: Fix bug where Package Exports warnings may have
been logged for nested `node_modules` path candidates.
(facebook/metro@29c77bf
by [@&#8203;huntie](https://togithub.com/huntie))
- **\[Experimental]**: Fix `package.json` discovery against root package
specifiers for Package Exports.
(facebook/metro@b995303
by [@&#8203;huntie](https://togithub.com/huntie), fixes
[facebook/metro#965
reported by [@&#8203;shamilovtim](https://togithub.com/shamilovtim))

**Full Changelog**:
facebook/metro@v0.76.1...v0.76.2

###
[`v0.76.1`](https://togithub.com/facebook/metro/releases/tag/v0.76.1)

[Compare
Source](https://togithub.com/facebook/metro/compare/v0.76.0...v0.76.1)

- **\[Feature]**: Support custom transformer/resolver options in `metro
build` and `runBuild` API.
(facebook/metro@fcfecc9
by [@&#8203;motiz88](https://togithub.com/motiz88))
- **\[Feature]**: `metro get-dependencies --entryFile <entryFile>` can
now be called as `metro get-dependencies <entryFile>`.
(facebook/metro@6fdce04
by [@&#8203;huntie](https://togithub.com/huntie))
- **\[Feature]**: Add `Content-Type` and `Content-Length` headers for
assets to Metro server.
([facebook/metro#953
by [@&#8203;aleqsio](https://togithub.com/aleqsio),
[facebook/metro#961
by [@&#8203;byCedric](https://togithub.com/byCedric))
- **\[Feature]**: Expose `mergeConfig` util from `metro` package.
(facebook/metro@aa8ec90
by [@&#8203;huntie](https://togithub.com/huntie))
- **\[Fix]**: `metro-file-map`: consistently abort crawl when `end()` is
called.
(facebook/metro@51877a8
by [@&#8203;motiz88](https://togithub.com/motiz88))
- **\[Fix]**: `metro-config`: Don't mutate argument to `loadConfig`.
(facebook/metro@38ec62d
by [@&#8203;motiz88](https://togithub.com/motiz88))
- **\[Fix]**: Babel transformers: Provide correct absolute source path
to plugins when Metro is not run from the project root.
(facebook/metro@de19bbd
by [@&#8203;robhogan](https://togithub.com/robhogan))
- **\[Fix]**:
[`resolver.assetExts`](https://facebook.github.io/metro/docs/configuration/#assetexts)
will now match asset files for extension values that include a dot
(`.`).
(facebook/metro@6d65a32
by [@&#8203;huntie](https://togithub.com/huntie))
- **\[Fix]**: Don't register an
[`unhandledRejection`](https://nodejs.org/api/process.html#event-unhandledrejection)
listener, fix spammy EventEmitter leak warning.
(facebook/metro@833f2ff
by [@&#8203;motiz88](https://togithub.com/motiz88))
- **\[Types]**: Add bundled TypeScript definitions (partial) for all
packages previously on DefinitelyTyped.
(facebook/metro@c022c36,
facebook/metro@07732e7,
facebook/metro@9ee5280
by [@&#8203;huntie](https://togithub.com/huntie), with
[@&#8203;afoxman](https://togithub.com/afoxman) and
[@&#8203;tido64](https://togithub.com/tido64))
- **\[Types]**: Expose `MetroConfig` type in `metro` package.
(facebook/metro@d2f3664
by [@&#8203;huntie](https://togithub.com/huntie))

> NOTE: Experimental features are not covered by semver and can change
at any time.

- **\[Experimental]**: Reorder `asyncRequire`'s parameters and make
module name optional.
(facebook/metro@4e5261c
by [@&#8203;motiz88](https://togithub.com/motiz88))
- **\[Experimental]**: Remove experimental `metro-hermes-compiler`
package.
(facebook/metro@833f2ff
by [@&#8203;motiz88](https://togithub.com/motiz88))
- **\[Experimental]**: Package Exports
[`unstable_conditionNames`](https://facebook.github.io/metro/docs/configuration/#unstable_conditionnames-experimental)
now defaults to `['require']`.
([facebook/metro#955
by [@&#8203;huntie](https://togithub.com/huntie))
- **\[Experimental]**: Add compatibility with legacy Node.js "exports"
array formats.
(facebook/metro@f321cff,
facebook/metro@1e47cb5
by [@&#8203;huntie](https://togithub.com/huntie))

**Full Changelog**:
facebook/metro@v0.76.0...v0.76.1

</details>

---

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are satisfied.

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3 participants