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fs: fix FixRangeOption to make fetch to end Range options absolute 

Before this change FixRangeOption was leaving `Range: bytes=21-`
alone, thus not fulfilling its contract of making Range requests
absolute.

As it happens this form isn't supported by Cloudflare R2.

After this change the request is normalised to `Range: bytes=21-25`.

See: #5642
This commit is contained in:
Nick Craig-Wood 2022-05-06 12:06:20 +01:00
parent e5974ac4b0
commit 1e66d052fd
2 changed files with 4 additions and 3 deletions
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3
fs/open_options.go
View File

@ -158,7 +158,8 @@ func FixRangeOption(options []OpenOption, size int64) {
x = &RangeOption{Start: size - x.End, End: -1}
options[i] = x
}
if x.End > size {
// If end is too big or undefined, fetch to the end
if x.End > size || x.End < 0 {
x = &RangeOption{Start: x.Start, End: size - 1}
options[i] = x
}

4
fs/open_options_test.go
View File

@ -183,7 +183,7 @@ func TestFixRangeOptions(t *testing.T) {
&RangeOption{Start: 1, End: -1},
},
want: []OpenOption{
&RangeOption{Start: 1, End: -1},
&RangeOption{Start: 1, End: 99},
},
size: 100,
},
@ -193,7 +193,7 @@ func TestFixRangeOptions(t *testing.T) {
&RangeOption{Start: -1, End: 10},
},
want: []OpenOption{
&RangeOption{Start: 90, End: -1},
&RangeOption{Start: 90, End: 99},
},
size: 100,
},