9 replies

HTTP byte ranges are ignored on cache miss

The repro is quite simple:

var hackId=Math.floor(Math.random()*100000);
fetch("https://browsercraft.cheerpj.com/lwjgl/lwjgl-2.9.3.jar?hack="+hackId, { headers: { range: "bytes=0-100" } })
fetch("https://browsercraft.cheerpj.com/lwjgl/lwjgl-2.9.3.jar?hack="+hackId, { headers: { range: "bytes=0-100" } })

var hackId=Math.floor(Math.random()*100000);
fetch("https://browsercraft.cheerpj.com/lwjgl/lwjgl-2.9.3.jar?hack="+hackId, { headers: { range: "bytes=0-100" } })
fetch("https://browsercraft.cheerpj.com/lwjgl/lwjgl-2.9.3.jar?hack="+hackId, { headers: { range: "bytes=0-100" } })

The expected behavior is that a 206 partial content response is returned for both requests, but actually the first one, being uncached, will incorrectly return 200.

@Walshy Since you helped us isolate a previous byte range problem. This time we can provide the repro so it should be easier to understand what is going on.

Cloudflare Developers•10mo ago•

9 replies

apignotti

HTTP byte ranges are ignored on cache miss

The repro is quite simple:

var hackId=Math.floor(Math.random()*100000);
fetch("https://browsercraft.cheerpj.com/lwjgl/lwjgl-2.9.3.jar?hack="+hackId, { headers: { range: "bytes=0-100" } })
fetch("https://browsercraft.cheerpj.com/lwjgl/lwjgl-2.9.3.jar?hack="+hackId, { headers: { range: "bytes=0-100" } })

var hackId=Math.floor(Math.random()*100000);
fetch("https://browsercraft.cheerpj.com/lwjgl/lwjgl-2.9.3.jar?hack="+hackId, { headers: { range: "bytes=0-100" } })
fetch("https://browsercraft.cheerpj.com/lwjgl/lwjgl-2.9.3.jar?hack="+hackId, { headers: { range: "bytes=0-100" } })

HTTP byte ranges are ignored on cache miss

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