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Support data URLs in the fetch polyfill #212

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Support data URLs in the fetch polyfill #212

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e62fabe
Add optional WHATWG Streams polyfill
matthargett Jul 22, 2026
4529fc4
Complete Blob streaming and slicing support
matthargett Jul 22, 2026
60b9101
Add browser-compatible Headers and Response
matthargett Jul 22, 2026
01b7d90
Handle empty Response byte bodies
matthargett Jul 22, 2026
cf07c38
Support data URLs in the fetch polyfill
matthargett Jul 22, 2026
3c94a84
Avoid intermediate data URL decode buffers
matthargett Jul 22, 2026
4da4749
Keep Streams implementations internally consistent
matthargett Jul 22, 2026
7e7fae2
Write Blob BYOB reads into caller buffers
matthargett Jul 22, 2026
418be92
Track Response body disturbance through stream operations
matthargett Jul 22, 2026
dac2d8c
Preserve Streams bundle bytes across source splits
matthargett Jul 26, 2026
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1 change: 1 addition & 0 deletions CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -102,6 +102,7 @@ option(JSRUNTIMEHOST_POLYFILL_FILE "Include JsRuntimeHost Polyfill File and File
option(JSRUNTIMEHOST_POLYFILL_PERFORMANCE "Include JsRuntimeHost Polyfill Performance." ON)
option(JSRUNTIMEHOST_POLYFILL_TEXTDECODER "Include JsRuntimeHost Polyfill TextDecoder." ON)
option(JSRUNTIMEHOST_POLYFILL_TEXTENCODER "Include JsRuntimeHost Polyfill TextEncoder." ON)
option(JSRUNTIMEHOST_POLYFILL_STREAMS "Include JsRuntimeHost Polyfill Web Streams." ON)

# Sanitizers
option(ENABLE_SANITIZERS "Enable AddressSanitizer and UBSan" OFF)
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1 change: 1 addition & 0 deletions Polyfills/Blob/CMakeLists.txt
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@@ -1,5 +1,6 @@
set(SOURCES
"Include/Babylon/Polyfills/Blob.h"
"README.md"
"Source/Blob.cpp"
"Source/Blob.h")

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12 changes: 12 additions & 0 deletions Polyfills/Blob/README.md
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Original file line number Diff line number Diff line change
@@ -0,0 +1,12 @@
# Blob

Provides the browser `Blob` constructor, byte/text readers, zero-copy Blob
composition and slicing, and a lazily pulled byte `ReadableStream`.

Call `Babylon::Polyfills::Streams::Initialize` before using `Blob.stream()` on
engines that do not provide Web Streams. Stream reads copy only the requested
chunk into JavaScript-owned memory; composing Blobs and slicing share immutable
native byte segments.

The focused tests are adapted from WPT `FileAPI/blob`, WebKit's Blob stream
chunk/crash regressions, and Firefox's large Blob `pipeTo` regression.
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