mirror of
https://github.com/goharbor/harbor.git
synced 2024-12-18 22:57:38 +01:00
add middlware for put manifest
The middleware is to handle manifest(blob) status in different push manifest situation, similar with blob Signed-off-by: wang yan <wangyan@vmware.com>
This commit is contained in:
parent
1d03b8727a
commit
67be511a85
@ -48,7 +48,6 @@ require (
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github.com/gorilla/mux v1.7.4
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github.com/gorilla/mux v1.7.4
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github.com/graph-gophers/dataloader v5.0.0+incompatible
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github.com/graph-gophers/dataloader v5.0.0+incompatible
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github.com/jinzhu/gorm v1.9.8 // indirect
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github.com/jinzhu/gorm v1.9.8 // indirect
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github.com/justinas/alice v0.0.0-20171023064455-03f45bd4b7da
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github.com/lib/pq v1.3.0
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github.com/lib/pq v1.3.0
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github.com/mattn/go-runewidth v0.0.4 // indirect
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github.com/mattn/go-runewidth v0.0.4 // indirect
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github.com/miekg/pkcs11 v0.0.0-20170220202408-7283ca79f35e // indirect
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github.com/miekg/pkcs11 v0.0.0-20170220202408-7283ca79f35e // indirect
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@ -57,6 +56,7 @@ require (
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github.com/opencontainers/go-digest v1.0.0-rc1
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github.com/opencontainers/go-digest v1.0.0-rc1
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github.com/opencontainers/image-spec v1.0.1
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github.com/opencontainers/image-spec v1.0.1
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github.com/opentracing/opentracing-go v1.1.0 // indirect
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github.com/opentracing/opentracing-go v1.1.0 // indirect
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github.com/pkg/errors v0.9.1
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github.com/pquerna/cachecontrol v0.0.0-20180517163645-1555304b9b35 // indirect
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github.com/pquerna/cachecontrol v0.0.0-20180517163645-1555304b9b35 // indirect
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github.com/robfig/cron v1.0.0
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github.com/robfig/cron v1.0.0
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github.com/shiena/ansicolor v0.0.0-20151119151921-a422bbe96644 // indirect
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github.com/shiena/ansicolor v0.0.0-20151119151921-a422bbe96644 // indirect
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@ -499,8 +499,6 @@ github.com/jstemmer/go-junit-report v0.9.1/go.mod h1:Brl9GWCQeLvo8nXZwPNNblvFj/X
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github.com/jtolds/gls v4.20.0+incompatible h1:xdiiI2gbIgH/gLH7ADydsJ1uDOEzR8yvV7C0MuV77Wo=
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github.com/jtolds/gls v4.20.0+incompatible h1:xdiiI2gbIgH/gLH7ADydsJ1uDOEzR8yvV7C0MuV77Wo=
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github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfVYBRgL+9YlvaHOwJU=
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github.com/jtolds/gls v4.20.0+incompatible/go.mod h1:QJZ7F/aHp+rZTRtaJ1ow/lLfFfVYBRgL+9YlvaHOwJU=
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github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7VTCxuUUipMqKk8s4w=
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github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7VTCxuUUipMqKk8s4w=
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github.com/justinas/alice v0.0.0-20171023064455-03f45bd4b7da h1:5y58+OCjoHCYB8182mpf/dEsq0vwTKPOo4zGfH0xW9A=
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github.com/justinas/alice v0.0.0-20171023064455-03f45bd4b7da/go.mod h1:oLH0CmIaxCGXD67VKGR5AacGXZSMznlmeqM8RzPrcY8=
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github.com/kardianos/osext v0.0.0-20190222173326-2bc1f35cddc0 h1:iQTw/8FWTuc7uiaSepXwyf3o52HaUYcV+Tu66S3F5GA=
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github.com/kardianos/osext v0.0.0-20190222173326-2bc1f35cddc0 h1:iQTw/8FWTuc7uiaSepXwyf3o52HaUYcV+Tu66S3F5GA=
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github.com/kardianos/osext v0.0.0-20190222173326-2bc1f35cddc0/go.mod h1:1NbS8ALrpOvjt0rHPNLyCIeMtbizbir8U//inJ+zuB8=
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github.com/kardianos/osext v0.0.0-20190222173326-2bc1f35cddc0/go.mod h1:1NbS8ALrpOvjt0rHPNLyCIeMtbizbir8U//inJ+zuB8=
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github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvWXihfKN4Q=
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github.com/kisielk/errcheck v1.1.0/go.mod h1:EZBBE59ingxPouuu3KfxchcWSUPOHkagtvWXihfKN4Q=
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@ -15,21 +15,60 @@
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package blob
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package blob
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import (
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import (
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"fmt"
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"github.com/goharbor/harbor/src/lib/errors"
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blob_models "github.com/goharbor/harbor/src/pkg/blob/models"
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"github.com/goharbor/harbor/src/server/middleware/requestid"
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"io/ioutil"
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"io/ioutil"
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"net/http"
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"net/http"
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"github.com/goharbor/harbor/src/lib/log"
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"github.com/goharbor/harbor/src/lib/log"
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"github.com/goharbor/harbor/src/pkg/distribution"
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"github.com/goharbor/harbor/src/pkg/distribution"
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"github.com/goharbor/harbor/src/server/middleware"
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"github.com/goharbor/harbor/src/server/middleware"
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"github.com/justinas/alice"
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)
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)
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// PutManifestMiddleware middleware which create Blobs for the foreign layers and associate them with the project,
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// PutManifestMiddleware middleware middleware is to update the manifest status according to the different situation before the request passed into proxy(distribution).
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// update the content type of the Blobs which already exist,
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// and it creates Blobs for the foreign layers and associate them with the project, updates the content type of the Blobs which already exist,
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// create Blob for the manifest, associate all Blobs with the manifest after PUT /v2/<name>/manifests/<reference> success.
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// create Blob for the manifest, associate all Blobs with the manifest after PUT /v2/<name>/manifests/<reference> success.
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func PutManifestMiddleware() func(http.Handler) http.Handler {
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func PutManifestMiddleware() func(http.Handler) http.Handler {
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before := middleware.BeforeRequest(func(r *http.Request) error {
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before := middleware.BeforeRequest(func(r *http.Request) error {
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// Do nothing, only make the request nopclose
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ctx := r.Context()
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logger := log.G(ctx)
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body, err := ioutil.ReadAll(r.Body)
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if err != nil {
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return err
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}
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contentType := r.Header.Get("Content-Type")
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_, descriptor, err := distribution.UnmarshalManifest(contentType, body)
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if err != nil {
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logger.Errorf("unmarshal manifest failed, error: %v", err)
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return errors.Wrapf(err, "unmarshal manifest failed").WithCode(errors.MANIFESTINVALID)
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}
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// bb here is the actually a manifest, which is also stored as a blob in DB and storage.
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bb, err := blobController.Get(r.Context(), descriptor.Digest.String())
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if err != nil {
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if errors.IsNotFoundErr(err) {
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return nil
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}
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return err
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}
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switch bb.Status {
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case blob_models.StatusNone, blob_models.StatusDelete, blob_models.StatusDeleteFailed:
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err := blobController.Touch(r.Context(), bb)
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if err != nil {
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logger.Errorf("failed to update manifest: %s status to StatusNone, error:%v", bb.Digest, err)
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return errors.Wrapf(err, fmt.Sprintf("the request id is: %s", r.Header.Get(requestid.HeaderXRequestID)))
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}
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case blob_models.StatusDeleting:
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logger.Warningf(fmt.Sprintf("the asking manifest is in GC, mark it as non existing, request id: %s", r.Header.Get(requestid.HeaderXRequestID)))
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return errors.New(nil).WithMessage(fmt.Sprintf("the asking manifest is in GC, mark it as non existing, request id: %s", r.Header.Get(requestid.HeaderXRequestID))).WithCode(errors.NotFoundCode)
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default:
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return nil
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}
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return nil
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return nil
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})
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})
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@ -99,7 +138,5 @@ func PutManifestMiddleware() func(http.Handler) http.Handler {
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return nil
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return nil
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})
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})
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return func(next http.Handler) http.Handler {
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return middleware.Chain(before, after)
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return alice.New(before, after).Then(next)
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}
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}
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}
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@ -16,12 +16,15 @@ package blob
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import (
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import (
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"fmt"
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"fmt"
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"github.com/goharbor/harbor/src/controller/blob"
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"github.com/goharbor/harbor/src/lib"
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pkg_blob "github.com/goharbor/harbor/src/pkg/blob"
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blob_models "github.com/goharbor/harbor/src/pkg/blob/models"
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"net/http"
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"net/http"
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"net/http/httptest"
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"net/http/httptest"
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"strings"
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"strings"
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"testing"
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"testing"
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"github.com/goharbor/harbor/src/controller/blob"
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"github.com/goharbor/harbor/src/pkg/distribution"
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"github.com/goharbor/harbor/src/pkg/distribution"
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htesting "github.com/goharbor/harbor/src/testing"
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htesting "github.com/goharbor/harbor/src/testing"
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"github.com/google/uuid"
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"github.com/google/uuid"
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@ -47,15 +50,15 @@ func (suite *PutManifestMiddlewareTestSuite) pushBlob(name string, digest string
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suite.Equal(res.Code, http.StatusCreated)
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suite.Equal(res.Code, http.StatusCreated)
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}
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}
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func (suite *PutManifestMiddlewareTestSuite) TestMiddleware() {
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func (suite *PutManifestMiddlewareTestSuite) prepare(name string) (distribution.Manifest, distribution.Descriptor, *http.Request) {
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body := `
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body := fmt.Sprintf(`
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{
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{
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"schemaVersion": 2,
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"schemaVersion": 2,
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"mediaType": "application/vnd.docker.distribution.manifest.v2+json",
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"mediaType": "application/vnd.docker.distribution.manifest.v2+json",
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"config": {
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"config": {
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"mediaType": "application/vnd.docker.container.image.v1+json",
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"mediaType": "application/vnd.docker.container.image.v1+json",
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"size": 6868,
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"size": 6868,
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"digest": "sha256:9b188f5fb1e6e1c7b10045585cb386892b2b4e1d31d62e3688c6fa8bf9fd32b5"
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"digest": "%s"
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},
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},
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"layers": [
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"layers": [
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{
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{
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@ -89,15 +92,27 @@ func (suite *PutManifestMiddlewareTestSuite) TestMiddleware() {
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"digest": "sha256:727f8da63ac248054cb7dda635ee16da76e553ec99be565a54180c83d04025a8"
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"digest": "sha256:727f8da63ac248054cb7dda635ee16da76e553ec99be565a54180c83d04025a8"
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}
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}
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]
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]
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}`
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}`, suite.DigestString())
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manifest, descriptor, err := distribution.UnmarshalManifest("application/vnd.docker.distribution.manifest.v2+json", []byte(body))
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manifest, descriptor, err := distribution.UnmarshalManifest("application/vnd.docker.distribution.manifest.v2+json", []byte(body))
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suite.Nil(err)
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suite.Nil(err)
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req := suite.NewRequest(http.MethodPut, fmt.Sprintf("/v2/%s/manifests/%s", name, descriptor.Digest.String()), strings.NewReader(body))
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req.Header.Set("Content-Type", "application/vnd.docker.distribution.manifest.v2+json")
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info := lib.ArtifactInfo{
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Repository: name,
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Reference: "latest",
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Tag: "latest",
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Digest: descriptor.Digest.String(),
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}
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return manifest, descriptor, req.WithContext(lib.WithArtifactInfo(req.Context(), info))
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}
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func (suite *PutManifestMiddlewareTestSuite) TestMiddleware() {
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suite.WithProject(func(projectID int64, projectName string) {
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suite.WithProject(func(projectID int64, projectName string) {
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name := fmt.Sprintf("%s/redis", projectName)
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name := fmt.Sprintf("%s/redis", projectName)
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req := suite.NewRequest(http.MethodPut, fmt.Sprintf("/v2/%s/manifests/%s", name, descriptor.Digest.String()), strings.NewReader(body))
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manifest, descriptor, req := suite.prepare(name)
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req.Header.Set("Content-Type", "application/vnd.docker.distribution.manifest.v2+json")
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res := httptest.NewRecorder()
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res := httptest.NewRecorder()
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next := suite.NextHandler(http.StatusCreated, map[string]string{"Docker-Content-Digest": descriptor.Digest.String()})
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next := suite.NextHandler(http.StatusCreated, map[string]string{"Docker-Content-Digest": descriptor.Digest.String()})
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@ -132,6 +147,60 @@ func (suite *PutManifestMiddlewareTestSuite) TestMiddleware() {
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})
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})
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}
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}
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func (suite *PutManifestMiddlewareTestSuite) TestMFInDeleting() {
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suite.WithProject(func(projectID int64, projectName string) {
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name := fmt.Sprintf("%s/photon", projectName)
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_, descriptor, req := suite.prepare(name)
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res := httptest.NewRecorder()
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id, err := blob.Ctl.Ensure(suite.Context(), descriptor.Digest.String(), "application/vnd.docker.distribution.manifest.v2+json", 512)
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suite.Nil(err)
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// status-none -> status-delete -> status-deleting
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_, err = pkg_blob.Mgr.UpdateBlobStatus(suite.Context(), &blob_models.Blob{ID: id, Status: blob_models.StatusDelete})
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suite.Nil(err)
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_, err = pkg_blob.Mgr.UpdateBlobStatus(suite.Context(), &blob_models.Blob{ID: id, Status: blob_models.StatusDeleting, Version: 1})
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suite.Nil(err)
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next := suite.NextHandler(http.StatusCreated, map[string]string{"Docker-Content-Digest": descriptor.Digest.String()})
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PutManifestMiddleware()(next).ServeHTTP(res, req)
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suite.Equal(http.StatusNotFound, res.Code)
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})
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}
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func (suite *PutManifestMiddlewareTestSuite) TestMFInDelete() {
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suite.WithProject(func(projectID int64, projectName string) {
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name := fmt.Sprintf("%s/photon", projectName)
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manifest, descriptor, req := suite.prepare(name)
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res := httptest.NewRecorder()
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id, err := blob.Ctl.Ensure(suite.Context(), descriptor.Digest.String(), "application/vnd.docker.distribution.manifest.v2+json", 512)
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suite.Nil(err)
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// status-none -> status-delete -> status-deleting
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_, err = pkg_blob.Mgr.UpdateBlobStatus(suite.Context(), &blob_models.Blob{ID: id, Status: blob_models.StatusDelete})
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suite.Nil(err)
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next := suite.NextHandler(http.StatusCreated, map[string]string{"Docker-Content-Digest": descriptor.Digest.String()})
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PutManifestMiddleware()(next).ServeHTTP(res, req)
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suite.Equal(http.StatusCreated, res.Code)
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for _, reference := range manifest.References() {
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opts := []blob.Option{
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blob.IsAssociatedWithArtifact(descriptor.Digest.String()),
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blob.IsAssociatedWithProject(projectID),
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}
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b, err := blob.Ctl.Get(suite.Context(), reference.Digest.String(), opts...)
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if suite.Nil(err) {
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suite.Equal(reference.MediaType, b.ContentType)
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suite.Equal(reference.Size, b.Size)
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suite.Equal(blob_models.StatusNone, b.Status)
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}
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}
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})
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}
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func TestPutManifestMiddlewareTestSuite(t *testing.T) {
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func TestPutManifestMiddlewareTestSuite(t *testing.T) {
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suite.Run(t, &PutManifestMiddlewareTestSuite{})
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suite.Run(t, &PutManifestMiddlewareTestSuite{})
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}
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}
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17
src/vendor/github.com/justinas/alice/.travis.yml
generated
vendored
17
src/vendor/github.com/justinas/alice/.travis.yml
generated
vendored
@ -1,17 +0,0 @@
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language: go
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matrix:
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include:
|
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- go: 1.0.x
|
|
||||||
- go: 1.1.x
|
|
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- go: 1.2.x
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|
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- go: 1.3.x
|
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- go: 1.4.x
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- go: 1.5.x
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- go: 1.6.x
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- go: 1.7.x
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- go: 1.8.x
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- go: 1.9.x
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- go: tip
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allow_failures:
|
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- go: tip
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|
20
src/vendor/github.com/justinas/alice/LICENSE
generated
vendored
20
src/vendor/github.com/justinas/alice/LICENSE
generated
vendored
@ -1,20 +0,0 @@
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The MIT License (MIT)
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|
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Copyright (c) 2014 Justinas Stankevicius
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Permission is hereby granted, free of charge, to any person obtaining a copy of
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|
||||||
this software and associated documentation files (the "Software"), to deal in
|
|
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the Software without restriction, including without limitation the rights to
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|
||||||
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
|
|
||||||
the Software, and to permit persons to whom the Software is furnished to do so,
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|
||||||
subject to the following conditions:
|
|
||||||
|
|
||||||
The above copyright notice and this permission notice shall be included in all
|
|
||||||
copies or substantial portions of the Software.
|
|
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|
||||||
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
||||||
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
|
|
||||||
FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
|
|
||||||
COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
|
|
||||||
IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
|
||||||
CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
98
src/vendor/github.com/justinas/alice/README.md
generated
vendored
98
src/vendor/github.com/justinas/alice/README.md
generated
vendored
@ -1,98 +0,0 @@
|
|||||||
# Alice
|
|
||||||
|
|
||||||
[![GoDoc](https://godoc.org/github.com/golang/gddo?status.svg)](http://godoc.org/github.com/justinas/alice)
|
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||||||
[![Build Status](https://travis-ci.org/justinas/alice.svg?branch=master)](https://travis-ci.org/justinas/alice)
|
|
||||||
[![Coverage](http://gocover.io/_badge/github.com/justinas/alice)](http://gocover.io/github.com/justinas/alice)
|
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||||||
|
|
||||||
Alice provides a convenient way to chain
|
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||||||
your HTTP middleware functions and the app handler.
|
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||||||
|
|
||||||
In short, it transforms
|
|
||||||
|
|
||||||
```go
|
|
||||||
Middleware1(Middleware2(Middleware3(App)))
|
|
||||||
```
|
|
||||||
|
|
||||||
to
|
|
||||||
|
|
||||||
```go
|
|
||||||
alice.New(Middleware1, Middleware2, Middleware3).Then(App)
|
|
||||||
```
|
|
||||||
|
|
||||||
### Why?
|
|
||||||
|
|
||||||
None of the other middleware chaining solutions
|
|
||||||
behaves exactly like Alice.
|
|
||||||
Alice is as minimal as it gets:
|
|
||||||
in essence, it's just a for loop that does the wrapping for you.
|
|
||||||
|
|
||||||
Check out [this blog post](http://justinas.org/alice-painless-middleware-chaining-for-go/)
|
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||||||
for explanation how Alice is different from other chaining solutions.
|
|
||||||
|
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||||||
### Usage
|
|
||||||
|
|
||||||
Your middleware constructors should have the form of
|
|
||||||
|
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||||||
```go
|
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||||||
func (http.Handler) http.Handler
|
|
||||||
```
|
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||||||
|
|
||||||
Some middleware provide this out of the box.
|
|
||||||
For ones that don't, it's trivial to write one yourself.
|
|
||||||
|
|
||||||
```go
|
|
||||||
func myStripPrefix(h http.Handler) http.Handler {
|
|
||||||
return http.StripPrefix("/old", h)
|
|
||||||
}
|
|
||||||
```
|
|
||||||
|
|
||||||
This complete example shows the full power of Alice.
|
|
||||||
|
|
||||||
```go
|
|
||||||
package main
|
|
||||||
|
|
||||||
import (
|
|
||||||
"net/http"
|
|
||||||
"time"
|
|
||||||
|
|
||||||
"github.com/throttled/throttled"
|
|
||||||
"github.com/justinas/alice"
|
|
||||||
"github.com/justinas/nosurf"
|
|
||||||
)
|
|
||||||
|
|
||||||
func timeoutHandler(h http.Handler) http.Handler {
|
|
||||||
return http.TimeoutHandler(h, 1*time.Second, "timed out")
|
|
||||||
}
|
|
||||||
|
|
||||||
func myApp(w http.ResponseWriter, r *http.Request) {
|
|
||||||
w.Write([]byte("Hello world!"))
|
|
||||||
}
|
|
||||||
|
|
||||||
func main() {
|
|
||||||
th := throttled.Interval(throttled.PerSec(10), 1, &throttled.VaryBy{Path: true}, 50)
|
|
||||||
myHandler := http.HandlerFunc(myApp)
|
|
||||||
|
|
||||||
chain := alice.New(th.Throttle, timeoutHandler, nosurf.NewPure).Then(myHandler)
|
|
||||||
http.ListenAndServe(":8000", chain)
|
|
||||||
}
|
|
||||||
```
|
|
||||||
|
|
||||||
Here, the request will pass [throttled](https://github.com/PuerkitoBio/throttled) first,
|
|
||||||
then an http.TimeoutHandler we've set up,
|
|
||||||
then [nosurf](https://github.com/justinas/nosurf)
|
|
||||||
and will finally reach our handler.
|
|
||||||
|
|
||||||
Note that Alice makes **no guarantees** for
|
|
||||||
how one or another piece of middleware will behave.
|
|
||||||
Once it passes the execution to the outer layer of middleware,
|
|
||||||
it has no saying in whether middleware will execute the inner handlers.
|
|
||||||
This is intentional behavior.
|
|
||||||
|
|
||||||
Alice works with Go 1.0 and higher.
|
|
||||||
|
|
||||||
### Contributing
|
|
||||||
|
|
||||||
0. Find an issue that bugs you / open a new one.
|
|
||||||
1. Discuss.
|
|
||||||
2. Branch off, commit, test.
|
|
||||||
3. Make a pull request / attach the commits to the issue.
|
|
112
src/vendor/github.com/justinas/alice/chain.go
generated
vendored
112
src/vendor/github.com/justinas/alice/chain.go
generated
vendored
@ -1,112 +0,0 @@
|
|||||||
// Package alice provides a convenient way to chain http handlers.
|
|
||||||
package alice
|
|
||||||
|
|
||||||
import "net/http"
|
|
||||||
|
|
||||||
// A constructor for a piece of middleware.
|
|
||||||
// Some middleware use this constructor out of the box,
|
|
||||||
// so in most cases you can just pass somepackage.New
|
|
||||||
type Constructor func(http.Handler) http.Handler
|
|
||||||
|
|
||||||
// Chain acts as a list of http.Handler constructors.
|
|
||||||
// Chain is effectively immutable:
|
|
||||||
// once created, it will always hold
|
|
||||||
// the same set of constructors in the same order.
|
|
||||||
type Chain struct {
|
|
||||||
constructors []Constructor
|
|
||||||
}
|
|
||||||
|
|
||||||
// New creates a new chain,
|
|
||||||
// memorizing the given list of middleware constructors.
|
|
||||||
// New serves no other function,
|
|
||||||
// constructors are only called upon a call to Then().
|
|
||||||
func New(constructors ...Constructor) Chain {
|
|
||||||
return Chain{append(([]Constructor)(nil), constructors...)}
|
|
||||||
}
|
|
||||||
|
|
||||||
// Then chains the middleware and returns the final http.Handler.
|
|
||||||
// New(m1, m2, m3).Then(h)
|
|
||||||
// is equivalent to:
|
|
||||||
// m1(m2(m3(h)))
|
|
||||||
// When the request comes in, it will be passed to m1, then m2, then m3
|
|
||||||
// and finally, the given handler
|
|
||||||
// (assuming every middleware calls the following one).
|
|
||||||
//
|
|
||||||
// A chain can be safely reused by calling Then() several times.
|
|
||||||
// stdStack := alice.New(ratelimitHandler, csrfHandler)
|
|
||||||
// indexPipe = stdStack.Then(indexHandler)
|
|
||||||
// authPipe = stdStack.Then(authHandler)
|
|
||||||
// Note that constructors are called on every call to Then()
|
|
||||||
// and thus several instances of the same middleware will be created
|
|
||||||
// when a chain is reused in this way.
|
|
||||||
// For proper middleware, this should cause no problems.
|
|
||||||
//
|
|
||||||
// Then() treats nil as http.DefaultServeMux.
|
|
||||||
func (c Chain) Then(h http.Handler) http.Handler {
|
|
||||||
if h == nil {
|
|
||||||
h = http.DefaultServeMux
|
|
||||||
}
|
|
||||||
|
|
||||||
for i := range c.constructors {
|
|
||||||
h = c.constructors[len(c.constructors)-1-i](h)
|
|
||||||
}
|
|
||||||
|
|
||||||
return h
|
|
||||||
}
|
|
||||||
|
|
||||||
// ThenFunc works identically to Then, but takes
|
|
||||||
// a HandlerFunc instead of a Handler.
|
|
||||||
//
|
|
||||||
// The following two statements are equivalent:
|
|
||||||
// c.Then(http.HandlerFunc(fn))
|
|
||||||
// c.ThenFunc(fn)
|
|
||||||
//
|
|
||||||
// ThenFunc provides all the guarantees of Then.
|
|
||||||
func (c Chain) ThenFunc(fn http.HandlerFunc) http.Handler {
|
|
||||||
if fn == nil {
|
|
||||||
return c.Then(nil)
|
|
||||||
}
|
|
||||||
return c.Then(fn)
|
|
||||||
}
|
|
||||||
|
|
||||||
// Append extends a chain, adding the specified constructors
|
|
||||||
// as the last ones in the request flow.
|
|
||||||
//
|
|
||||||
// Append returns a new chain, leaving the original one untouched.
|
|
||||||
//
|
|
||||||
// stdChain := alice.New(m1, m2)
|
|
||||||
// extChain := stdChain.Append(m3, m4)
|
|
||||||
// // requests in stdChain go m1 -> m2
|
|
||||||
// // requests in extChain go m1 -> m2 -> m3 -> m4
|
|
||||||
func (c Chain) Append(constructors ...Constructor) Chain {
|
|
||||||
newCons := make([]Constructor, 0, len(c.constructors)+len(constructors))
|
|
||||||
newCons = append(newCons, c.constructors...)
|
|
||||||
newCons = append(newCons, constructors...)
|
|
||||||
|
|
||||||
return Chain{newCons}
|
|
||||||
}
|
|
||||||
|
|
||||||
// Extend extends a chain by adding the specified chain
|
|
||||||
// as the last one in the request flow.
|
|
||||||
//
|
|
||||||
// Extend returns a new chain, leaving the original one untouched.
|
|
||||||
//
|
|
||||||
// stdChain := alice.New(m1, m2)
|
|
||||||
// ext1Chain := alice.New(m3, m4)
|
|
||||||
// ext2Chain := stdChain.Extend(ext1Chain)
|
|
||||||
// // requests in stdChain go m1 -> m2
|
|
||||||
// // requests in ext1Chain go m3 -> m4
|
|
||||||
// // requests in ext2Chain go m1 -> m2 -> m3 -> m4
|
|
||||||
//
|
|
||||||
// Another example:
|
|
||||||
// aHtmlAfterNosurf := alice.New(m2)
|
|
||||||
// aHtml := alice.New(m1, func(h http.Handler) http.Handler {
|
|
||||||
// csrf := nosurf.New(h)
|
|
||||||
// csrf.SetFailureHandler(aHtmlAfterNosurf.ThenFunc(csrfFail))
|
|
||||||
// return csrf
|
|
||||||
// }).Extend(aHtmlAfterNosurf)
|
|
||||||
// // requests to aHtml hitting nosurfs success handler go m1 -> nosurf -> m2 -> target-handler
|
|
||||||
// // requests to aHtml hitting nosurfs failure handler go m1 -> nosurf -> m2 -> csrfFail
|
|
||||||
func (c Chain) Extend(chain Chain) Chain {
|
|
||||||
return c.Append(chain.constructors...)
|
|
||||||
}
|
|
2
src/vendor/modules.txt
vendored
2
src/vendor/modules.txt
vendored
@ -269,8 +269,6 @@ github.com/hashicorp/go-multierror
|
|||||||
github.com/jmespath/go-jmespath
|
github.com/jmespath/go-jmespath
|
||||||
# github.com/json-iterator/go v1.1.8
|
# github.com/json-iterator/go v1.1.8
|
||||||
github.com/json-iterator/go
|
github.com/json-iterator/go
|
||||||
# github.com/justinas/alice v0.0.0-20171023064455-03f45bd4b7da
|
|
||||||
github.com/justinas/alice
|
|
||||||
# github.com/konsorten/go-windows-terminal-sequences v1.0.2
|
# github.com/konsorten/go-windows-terminal-sequences v1.0.2
|
||||||
github.com/konsorten/go-windows-terminal-sequences
|
github.com/konsorten/go-windows-terminal-sequences
|
||||||
# github.com/lib/pq v1.3.0
|
# github.com/lib/pq v1.3.0
|
||||||
|
Loading…
Reference in New Issue
Block a user