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https://github.com/rclone/rclone
synced 2024-11-21 22:50:16 +01:00
fs: fix FixRangeOption so it doesn't add HTTPOptions in place of bad Ranges
Before this fix, FixRangeOption would substitute RangeOptions it wanted to get rid of with with empty HTTPOption. This caused a problem now that backends interpret HTTPOptions. This fix subsitutes those with NullOptions which aren't interpreted as HTTPOptions. This patch also improves the unit tests.
This commit is contained in:
Nick Craig-Wood
parent
c4572ebc91
commit
75fc3fe389
@ -42,8 +42,8 @@ type OpenOption interface {
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//
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// RangeOption{Start: 0, End: 99} - fetch the first 100 bytes
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// RangeOption{Start: 100, End: 199} - fetch the second 100 bytes
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// RangeOption{Start: 100} - fetch bytes from offset 100 to the end
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// RangeOption{End: 100} - fetch the last 100 bytes
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// RangeOption{Start: 100, End: -1} - fetch bytes from offset 100 to the end
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// RangeOption{Start: -1, End: 100} - fetch the last 100 bytes
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//
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// A RangeOption implements a single byte-range-spec from
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// https://tools.ietf.org/html/rfc7233#section-2.1
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@ -141,10 +141,10 @@ func (o *RangeOption) Decode(size int64) (offset, limit int64) {
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func FixRangeOption(options []OpenOption, size int64) {
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if size == 0 {
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// if size 0 then remove RangeOption~s
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// replacing with an empty HTTPOption~s which won't be rendered
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// replacing with an NullOptions~s which won't be rendered
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for i := range options {
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if _, ok := options[i].(*RangeOption); ok {
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options[i] = &HTTPOption{}
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options[i] = NullOption{}
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}
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}
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@ -230,6 +230,25 @@ func (o *HashesOption) Mandatory() bool {
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return false
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}
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// NullOption defines an Option which does nothing
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type NullOption struct {
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}
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// Header formats the option as an http header
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func (o NullOption) Header() (key string, value string) {
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return "", ""
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}
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// String formats the option into human readable form
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func (o NullOption) String() string {
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return fmt.Sprintf("NullOption()")
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}
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// Mandatory returns whether the option must be parsed or can be ignored
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func (o NullOption) Mandatory() bool {
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return false
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}
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// OpenOptionAddHeaders adds each header found in options to the
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// headers map provided the key was non empty.
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func OpenOptionAddHeaders(options []OpenOption, headers map[string]string) {
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@ -264,10 +283,3 @@ func OpenOptionAddHTTPHeaders(headers http.Header, options []OpenOption) {
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}
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}
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}
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// check interface
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var (
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_ OpenOption = (*RangeOption)(nil)
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_ OpenOption = (*SeekOption)(nil)
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_ OpenOption = (*HTTPOption)(nil)
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)
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@ -2,8 +2,10 @@ package fs
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import (
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"fmt"
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"net/http"
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"testing"
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"github.com/rclone/rclone/fs/hash"
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"github.com/stretchr/testify/assert"
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"github.com/stretchr/testify/require"
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)
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@ -58,3 +60,197 @@ func TestRangeOptionDecode(t *testing.T) {
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assert.Equal(t, test.wantLimit, gotLimit, "limit "+what)
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}
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}
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func TestRangeOption(t *testing.T) {
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opt := &RangeOption{Start: 1, End: 10}
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var _ OpenOption = opt // check interface
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assert.Equal(t, "RangeOption(1,10)", opt.String())
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key, value := opt.Header()
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assert.Equal(t, "Range", key)
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assert.Equal(t, "bytes=1-10", value)
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assert.Equal(t, true, opt.Mandatory())
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opt = &RangeOption{Start: -1, End: 10}
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assert.Equal(t, "RangeOption(-1,10)", opt.String())
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key, value = opt.Header()
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assert.Equal(t, "Range", key)
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assert.Equal(t, "bytes=-10", value)
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assert.Equal(t, true, opt.Mandatory())
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opt = &RangeOption{Start: 1, End: -1}
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assert.Equal(t, "RangeOption(1,-1)", opt.String())
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key, value = opt.Header()
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assert.Equal(t, "Range", key)
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assert.Equal(t, "bytes=1-", value)
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assert.Equal(t, true, opt.Mandatory())
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opt = &RangeOption{Start: -1, End: -1}
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assert.Equal(t, "RangeOption(-1,-1)", opt.String())
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key, value = opt.Header()
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assert.Equal(t, "Range", key)
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assert.Equal(t, "bytes=-", value)
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assert.Equal(t, true, opt.Mandatory())
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}
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func TestSeekOption(t *testing.T) {
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opt := &SeekOption{Offset: 1}
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var _ OpenOption = opt // check interface
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assert.Equal(t, "SeekOption(1)", opt.String())
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key, value := opt.Header()
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assert.Equal(t, "Range", key)
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assert.Equal(t, "bytes=1-", value)
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assert.Equal(t, true, opt.Mandatory())
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}
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func TestHTTPOption(t *testing.T) {
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opt := &HTTPOption{Key: "k", Value: "v"}
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var _ OpenOption = opt // check interface
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assert.Equal(t, `HTTPOption("k","v")`, opt.String())
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key, value := opt.Header()
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assert.Equal(t, "k", key)
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assert.Equal(t, "v", value)
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assert.Equal(t, false, opt.Mandatory())
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}
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func TestHashesOption(t *testing.T) {
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opt := &HashesOption{hash.Set(hash.MD5 | hash.SHA1)}
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var _ OpenOption = opt // check interface
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assert.Equal(t, `HashesOption([MD5, SHA-1])`, opt.String())
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key, value := opt.Header()
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assert.Equal(t, "", key)
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assert.Equal(t, "", value)
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assert.Equal(t, false, opt.Mandatory())
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}
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func TestNullOption(t *testing.T) {
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opt := NullOption{}
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var _ OpenOption = opt // check interface
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assert.Equal(t, "NullOption()", opt.String())
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key, value := opt.Header()
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assert.Equal(t, "", key)
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assert.Equal(t, "", value)
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assert.Equal(t, false, opt.Mandatory())
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}
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func TestFixRangeOptions(t *testing.T) {
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for _, test := range []struct {
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name string
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in []OpenOption
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size int64
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want []OpenOption
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}{
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{
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name: "Nil options",
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in: nil,
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want: nil,
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},
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{
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name: "Empty options",
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in: []OpenOption{},
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want: []OpenOption{},
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},
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{
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name: "Fetch a range with size=0",
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in: []OpenOption{
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&HTTPOption{Key: "a", Value: "1"},
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&RangeOption{Start: 1, End: 10},
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&HTTPOption{Key: "b", Value: "2"},
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},
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want: []OpenOption{
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&HTTPOption{Key: "a", Value: "1"},
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NullOption{},
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&HTTPOption{Key: "b", Value: "2"},
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},
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size: 0,
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},
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{
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name: "Fetch a range",
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in: []OpenOption{
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&HTTPOption{Key: "a", Value: "1"},
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&RangeOption{Start: 1, End: 10},
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&HTTPOption{Key: "b", Value: "2"},
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},
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want: []OpenOption{
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&HTTPOption{Key: "a", Value: "1"},
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&RangeOption{Start: 1, End: 10},
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&HTTPOption{Key: "b", Value: "2"},
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},
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size: 100,
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},
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{
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name: "Fetch to end",
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in: []OpenOption{
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&RangeOption{Start: 1, End: -1},
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},
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want: []OpenOption{
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&RangeOption{Start: 1, End: -1},
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},
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size: 100,
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},
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{
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name: "Fetch the last 10 bytes",
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in: []OpenOption{
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&RangeOption{Start: -1, End: 10},
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},
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want: []OpenOption{
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&RangeOption{Start: 90, End: -1},
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},
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size: 100,
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},
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{
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name: "Fetch with end bigger than size",
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in: []OpenOption{
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&RangeOption{Start: 10, End: 200},
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},
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want: []OpenOption{
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&RangeOption{Start: 10, End: 99},
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},
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size: 100,
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},
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} {
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FixRangeOption(test.in, test.size)
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assert.Equal(t, test.want, test.in, test.name)
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}
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}
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var testOpenOptions = []OpenOption{
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&HTTPOption{Key: "a", Value: "1"},
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&RangeOption{Start: 1, End: 10},
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&HTTPOption{Key: "b", Value: "2"},
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NullOption{},
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&HashesOption{hash.Set(hash.MD5 | hash.SHA1)},
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}
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func TestOpenOptionAddHeaders(t *testing.T) {
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m := map[string]string{}
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want := map[string]string{
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"a": "1",
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"Range": "bytes=1-10",
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"b": "2",
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}
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OpenOptionAddHeaders(testOpenOptions, m)
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assert.Equal(t, want, m)
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}
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func TestOpenOptionHeaders(t *testing.T) {
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want := map[string]string{
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"a": "1",
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"Range": "bytes=1-10",
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"b": "2",
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}
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m := OpenOptionHeaders(testOpenOptions)
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assert.Equal(t, want, m)
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assert.Nil(t, OpenOptionHeaders([]OpenOption{}))
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}
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func TestOpenOptionAddHTTPHeaders(t *testing.T) {
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headers := http.Header{}
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want := http.Header{
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"A": {"1"},
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"Range": {"bytes=1-10"},
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"B": {"2"},
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}
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OpenOptionAddHTTPHeaders(headers, testOpenOptions)
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assert.Equal(t, want, headers)
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}
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