feat: support mulit/range #1398

byene0923 · 2022-10-17T14:42:16Z

change SetByteRange, support multipart/byteranges
change bigFileReader and fsSmallFileReader which only handle complete files
add smallRangeReader and bigRangeReader which only handle range files
change byteRangeUpdater interface to byteRangeHandler
test
change TestFSByteRangeSingleThread, add bigFileReader and fsSmallFileReader test of read and WriteTo
add TestFSMultiByteRangeConcurrent and TestFSMultiByteRangeSingleThread
change TestParseByteMultiRangeSuccess and TestParseByteRangeError

header.go

header_test.go

1. lint code 2. add SetByteRanges method

erikdubbelboer · 2022-10-22T09:47:46Z

fs.go

+		v = &smallRangeReader{
+			sta: make([]int, 64),
+			end: make([]int, 64),
+			buf: make([]byte, 4096),


Why 4096, why not maxSmallFileSize?

4096 keep the same with copyBufPool, this use for copyZeroAlloc

erikdubbelboer · 2022-10-22T09:53:02Z

fs.go

+			cLen = len(p[cPos:])
+			n = copy(p[cPos:], r.buf)
+			cPos += n
+			if len(r.buf) > cLen {


What if cLen is less than the length of the range header? Shouldn't this check exclude the header?

this is a bit complex
the multibyte/range like

--3d6b6a416f9b5 Content-Type: text/html Content-Range: bytes 0-15/1270 <!DOCTYPE html> --3d6b6a416f9b5 Content-Type: text/html Content-Range: bytes 0-10/1270 <!DOCTYPE --3d6b6a416f9b5--

for each range, we need to add boundary, Content-Type, Content-Range first, then add http content, at last range, we need to and boundary--

however, the length of p is limited, so we need to check whether p is full when we add multiRangeBodyHeader which contain boundary, Content-Type, Content-Range and http content, and multiRangeBodyEnd which contain boundary--

the r.buf is the rest content of multiRangeBodyHeader or multiRangeBodyEnd that has not copy into p at last time.
cLen is the rest lengh of p, and we have done n = copy(p[cPos:], r.buf), if cLen is less then len(r.buf), we can copy all the content of r.buf to p

by the way,
method read like a streaming which the p is limited
first, we read the multiRangeBodyHeader, then we read http content, if we are in last range, we read the multiRangeBodyEnd

the code which handle range content begins in line fs.go 1603

erikdubbelboer · 2022-10-22T09:55:04Z

fs.go

+	if rf, ok := w.(io.ReaderFrom); ok {
+		return rf.ReadFrom(r)
+	}


Is this still relevant? And if so why not do it in smallRangeReader as well?

this is for bytebufferpool, do as this

bb := bytebufferpool.Get() _, err := reader.WriteTo(bb)

and smallRangeReader has also do it, in fs.go line 1690. smallRangeReader do the same as smallFileReader, handle directory first, then handle readfrom, last handle write

erikdubbelboer

It seems like TestFSMultiByteRangeConcurrent always gets a timeout, can you fix that any other tests that might fail?

byene0923 · 2022-10-29T17:18:57Z

sure, the test number of concurrent and multirange may be too large

erikdubbelboer · 2022-10-30T08:48:52Z

Thanks!

This reverts commit a468a7d.

erikdubbelboer · 2022-11-28T10:54:43Z

@byene0923 I had to revert this change as it caused a critical bug: #1445

Can you have a look at adding a test case for this and fixing it?

byene0923 · 2022-11-28T11:02:21Z

ok, sorry for missing the full tests. i will look deep into it

kitsuniru · 2022-11-28T18:59:39Z

@byene0923 maybe it will be useful to you, but when we request large static file, then in request headers an interesting heading appears - Range: 3896-3896
on others files there's no such header

also, it's worth noting that my file was 5mb in size and returned was 200 bytes

byene0923 · 2022-11-28T20:17:32Z

@MindMayhem thanks a lot ,but i can not reproduce it by your files in #1445 now. should any changes i do in your code ?

kitsuniru · 2022-11-28T20:26:23Z

@byene0923 that's not my example, but i pretty sure it shows that error, just check your browser console
i hope @smalloff can provide more info to you

erikdubbelboer · 2022-11-29T07:40:44Z

I was able to reproduce it on MacOS using the files in the zipfile in this comment: #1445 (comment) Only thing I did was go mod tidy and go run main.go.

li-jin-gou · 2022-11-29T08:13:10Z

I was able to reproduce it on MacOS using the files in the zipfile in this comment: #1445 (comment) Only thing I did was go mod tidy and go run main.go.

I'll try.

byene0923 · 2022-11-29T15:14:12Z

thanks a lot to @MindMayhem and @erikdubbelboer, i reproduce it, i will look into it soon

byene0923 · 2022-11-29T16:32:01Z

hello, @erikdubbelboer @MindMayhem i have found the bug in fasthttp@1.42.0 fs.go, line 749

func (r *fsSmallFileReader) WriteTo(w io.Writer) (int64, error) {
	if r.offset != 0 {
		panic("BUG: non-zero offset! Read() mustn't be called before WriteTo()")
	}

when file size in (4096, 8192) will cause this bug. because writeTo() will be called twice, and the second call r.offset is not zero, so this will cause panic, when file size > 8192, it use bigFileReader, when file size < 4096, writeTo() will be called only once, because the buf from copyBufPool and size is 4096

many thanks to @MindMayhem and @smalloff ! i will fix it soon and add unit tests

byene0923 · 2022-12-02T17:17:42Z

i delete this check. and i'm doing the unit test, you could change the go.mod of the zipfile in this comment: #1445 (comment)

just add this at the last line of go.mod

replace github.com/valyala/fasthttp => github.com/byene0923/fasthttp v1.23.1-0.20221202163206-7e40fb23488f

if @erikdubbelboer @MindMayhem have interest, can have a try

feat: support mulit/range

d67a1fd

erikdubbelboer requested changes Oct 19, 2022

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fix:

6fa9253

1. lint code 2. add SetByteRanges method

erikdubbelboer requested changes Oct 22, 2022

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erikdubbelboer requested changes Oct 29, 2022

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byene0923 and others added 2 commits October 30, 2022 01:23

fix: reduce the test number of testFSSingleByteRange

eb52a84

Merge branch 'valyala:master' into feat/support_multi_range

b7cb727

erikdubbelboer merged commit a468a7d into valyala:master Oct 30, 2022

byene0923 mentioned this pull request Nov 9, 2022

Feat: support multi range cloudwego/hertz#160

Open

erikdubbelboer added a commit that referenced this pull request Nov 28, 2022

Revert "feat: support mulit/range (#1398)"

0019415

This reverts commit a468a7d.

erikdubbelboer mentioned this pull request Nov 28, 2022

Revert "feat: support mulit/range" #1446

Merged

erikdubbelboer added a commit that referenced this pull request Nov 28, 2022

Revert "feat: support mulit/range (#1398)" (#1446)

dbf457e

This reverts commit a468a7d.

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feat: support mulit/range #1398

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feat: support mulit/range #1398

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