예제 #1
0
// Fetch returns a list of images for the specified cloud matching the constraint.
// The base URL locations are as specified - the first location which has a file is the one used.
// Signed data is preferred, but if there is no signed data available and onlySigned is false,
// then unsigned data is used.
func Fetch(
	sources []simplestreams.DataSource, indexPath string, cons *ImageConstraint,
	onlySigned bool) ([]*ImageMetadata, *simplestreams.ResolveInfo, error) {
	params := simplestreams.ValueParams{
		DataType:      ImageIds,
		FilterFunc:    appendMatchingImages,
		ValueTemplate: ImageMetadata{},
		PublicKey:     simplestreamsImagesPublicKey,
	}
	items, resolveInfo, err := simplestreams.GetMetadata(sources, indexPath, cons, onlySigned, params)
	if err != nil {
		return nil, resolveInfo, err
	}
	metadata := make([]*ImageMetadata, len(items))
	for i, md := range items {
		metadata[i] = md.(*ImageMetadata)
	}
	// Sorting the metadata is not strictly necessary, but it ensures consistent ordering for
	// all compilers, and it just makes it easier to look at the data.
	Sort(metadata)
	return metadata, resolveInfo, nil
}
예제 #2
0
func (s *simplestreamsSuite) TestGetMetadataNoMatching(c *gc.C) {
	source := &countingSource{
		DataSource: simplestreams.NewURLDataSource(
			"test", "test:/daily", utils.VerifySSLHostnames,
		),
	}
	sources := []simplestreams.DataSource{source, source, source}
	params := simplestreams.ValueParams{DataType: "image-ids"}
	constraint := sstesting.NewTestConstraint(simplestreams.LookupParams{
		CloudSpec: simplestreams.CloudSpec{
			Region:   "us-east-1",
			Endpoint: "https://ec2.us-east-1.amazonaws.com",
		},
		Series: []string{"precise"},
		Arches: []string{"not-a-real-arch"}, // never matches
	})

	items, resolveInfo, err := simplestreams.GetMetadata(
		sources,
		simplestreams.DefaultIndexPath,
		constraint,
		false,
		params,
	)
	c.Assert(err, gc.IsNil)
	c.Assert(items, gc.HasLen, 0)
	c.Assert(resolveInfo, gc.DeepEquals, &simplestreams.ResolveInfo{
		Source:    "test",
		Signed:    false,
		IndexURL:  "test:/daily/streams/v1/index.json",
		MirrorURL: "",
	})

	// There should be 2 calls to each data-source:
	// one for .sjson, one for .json.
	c.Assert(source.count, gc.Equals, 2*len(sources))
}