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Fix mimeType parsing for CDP responses (#53027)

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Summary:
Pull Request resolved: https://github.com/facebook/react-native/pull/53027

Tweaks MIME type parsing in CDP Network messages, now matching Chrome.

This fixes response preview behaviour by the frontend for text response previews that are `base64Encoded` 🙌🏻 (we were observing these for JSON `fetch` calls on iOS).

Changelog: [Internal]

Reviewed By: vzaidman

Differential Revision: D79559495

fbshipit-source-id: 2565af7587fc6fbdd3ef6fcbb10c558341ddfbdc
This commit is contained in:
Alex Hunt
2025-08-04 10:29:37 -07:00
committed by Facebook GitHub Bot
parent fa66e314b2
commit e39fd8f79c
1 changed files with 9 additions and 1 deletions
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packages/react-native/ReactCommon/jsinspector-modern/network/HttpUtils.cpp
+9 -1
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@@ -154,7 +154,15 @@ std::string mimeTypeFromHeaders(const Headers& headers) {
std::transform(
lowerName.begin(), lowerName.end(), lowerName.begin(), ::tolower);
if (lowerName == "content-type") {
mimeType = value;
// Parse MIME type (discarding any parameters after ";") from the
// Content-Type header
// https://datatracker.ietf.org/doc/html/rfc7231#section-3.1.1.1
size_t pos = value.find(';');
if (pos != std::string::npos) {
mimeType = value.substr(0, pos);
} else {
mimeType = value;
}
break;
}
}