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fix(core): correct asset protocol multi-range responses (fix: #15837) - #15838

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lazerg:fix/issue-15837-asset-multirange
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fix(core): correct asset protocol multi-range responses (fix: #15837)#15838
lazerg wants to merge 2 commits into
tauri-apps:devfrom
lazerg:fix/issue-15837-asset-multirange

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@lazerg

@lazerg lazerg commented Aug 6, 2026

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Multi-range asset:// responses had three problems. The multipart body was terminated with an opening boundary (--boundary) instead of the close-delimiter RFC 2046 asks for (--boundary--). The sniffed file mime type set before the range branch stayed on the response alongside multipart/byteranges, because Builder::header appends rather than replaces, so clients reading the first Content-Type parsed the envelope as the file itself. And the status stayed 200 OK while the body was partial.

Single-range requests, which is what <video> and <audio> normally send, were never affected, so this only shows up on clients asking for more than one range. Added a unit test covering all three.

Closes #15837.

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lazerg requested a review from a team as a code owner August 6, 2026 23:47
@lazerg lazerg changed the title fix(core): correct asset protocol multi-range responses fix(core): correct asset protocol multi-range responses (fix: #15837) Aug 7, 2026
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Package Changes Through 85d7a46

There are 14 changes which include tauri with minor, tauri-cli with minor, @tauri-apps/cli with minor, tauri-runtime with minor, tauri-runtime-wry with minor, tauri-utils with minor, tauri-bundler with minor, tauri-build with minor, tauri-macos-sign with minor, tauri-codegen with minor, tauri-macros with minor, tauri-plugin with minor, tauri-driver with minor, @tauri-apps/api with minor

Planned Package Versions

The following package releases are the planned based on the context of changes in this pull request.

package current next
@tauri-apps/api 2.11.1 2.12.0
tauri-utils 2.9.3 2.10.0
tauri-macos-sign 2.3.4 2.4.0
tauri-bundler 2.9.4 2.10.0
tauri-runtime 2.11.3 2.12.0
tauri-runtime-wry 2.11.4 2.12.0
tauri-codegen 2.6.3 2.7.0
tauri-macros 2.6.3 2.7.0
tauri-plugin 2.6.3 2.7.0
tauri-build 2.6.3 2.7.0
tauri 2.11.5 2.12.0
@tauri-apps/cli 2.11.4 2.12.0
tauri-cli 2.11.4 2.12.0
tauri-driver 2.0.6 2.1.0

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[bug] asset protocol multi-range responses: missing close delimiter, duplicate Content-Type, and 200 instead of 206

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