fix typos

Signed-off-by: allencloud <allen.sun@daocloud.io>

ROADMAP.md

@@ -156,7 +156,7 @@ full and understand the problems behind deletes.
 While, at first glance, implementing deleting seems simple, there are a number
 mitigating factors that make many solutions not ideal or even pathological in
 the context of a registry. The following paragraph discuss the background and
-approaches that could be applied to a arrive at a solution.
+approaches that could be applied to arrive at a solution.
 
 The goal of deletes in any system is to remove unused or unneeded data. Only
 data requested for deletion should be removed and no other data. Removing

docs/configuration.md

@@ -1032,7 +1032,7 @@ and proxy connections to the registry server.
       no
     </td>
     <td>
-      An array of absolute paths to a x509 CA file
+      An array of absolute paths to an x509 CA file
     </td>
   </tr>
 </table>

docs/spec/api.md

@@ -706,7 +706,7 @@ the uploaded blob data.
 ###### Digest Parameter
 
 The "digest" parameter is designed as an opaque parameter to support
-verification of a successful transfer. For example, a HTTP URI parameter
+verification of a successful transfer. For example, an HTTP URI parameter
 might be as follows:
 
 ```

docs/spec/api.md.tmpl

@@ -706,7 +706,7 @@ the uploaded blob data.
 ###### Digest Parameter
 
 The "digest" parameter is designed as an opaque parameter to support
-verification of a successful transfer. For example, a HTTP URI parameter
+verification of a successful transfer. For example, an HTTP URI parameter
 might be as follows:
 
 ```

docs/spec/manifest-v2-2.md

@@ -57,7 +57,7 @@ image manifest based on the Content-Type returned in the HTTP response.
 
     The manifests field contains a list of manifests for specific platforms.
 
-    Fields of a object in the manifests list are:
+    Fields of an object in the manifests list are:
 
     - **`mediaType`** *string*
 

health/doc.go

@@ -2,7 +2,7 @@
 // The health package works expvar style. By importing the package the debug
 // server is getting a "/debug/health" endpoint that returns the current
 // status of the application.
-// If there are no errors, "/debug/health" will return a HTTP 200 status,
+// If there are no errors, "/debug/health" will return an HTTP 200 status,
 // together with an empty JSON reply "{}". If there are any checks
 // with errors, the JSON reply will include all the failed checks, and the
 // response will be have an HTTP 503 status.

registry/auth/htpasswd/htpasswd.go

@@ -46,7 +46,7 @@ func (htpasswd *htpasswd) authenticateUser(username string, password string) err
 
 // parseHTPasswd parses the contents of htpasswd. This will read all the
 // entries in the file, whether or not they are needed. An error is returned
-// if an syntax errors are encountered or if the reader fails.
+// if a syntax errors are encountered or if the reader fails.
 func parseHTPasswd(rd io.Reader) (map[string][]byte, error) {
 	entries := map[string][]byte{}
 	scanner := bufio.NewScanner(rd)

registry/client/errors.go

@@ -11,7 +11,7 @@ import (
 	"github.com/docker/distribution/registry/api/errcode"
 )
 
-// ErrNoErrorsInBody is returned when a HTTP response body parses to an empty
+// ErrNoErrorsInBody is returned when an HTTP response body parses to an empty
 // errcode.Errors slice.
 var ErrNoErrorsInBody = errors.New("no error details found in HTTP response body")
 

registry/handlers/api_test.go

@@ -926,7 +926,7 @@ func testManifestAPISchema1(t *testing.T, env *testEnv, imageName reference.Name
 	}
 
 	// TODO(stevvooe): Add a test case where we take a mostly valid registry,
-	// tamper with the content and ensure that we get a unverified manifest
+	// tamper with the content and ensure that we get an unverified manifest
 	// error.
 
 	// Push 2 random layers

registry/handlers/helpers.go

@@ -20,7 +20,7 @@ func closeResources(handler http.Handler, closers ...io.Closer) http.Handler {
 	})
 }
 
-// copyFullPayload copies the payload of a HTTP request to destWriter. If it
+// copyFullPayload copies the payload of an HTTP request to destWriter. If it
 // receives less content than expected, and the client disconnected during the
 // upload, it avoids sending a 400 error to keep the logs cleaner.
 func copyFullPayload(responseWriter http.ResponseWriter, r *http.Request, destWriter io.Writer, context ctxu.Context, action string, errSlice *errcode.Errors) error {

registry/registry.go

@@ -267,7 +267,7 @@ func logLevel(level configuration.Loglevel) log.Level {
 	return l
 }
 
-// panicHandler add a HTTP handler to web app. The handler recover the happening
+// panicHandler add an HTTP handler to web app. The handler recover the happening
 // panic. logrus.Panic transmits panic message to pre-config log hooks, which is
 // defined in config.yml.
 func panicHandler(handler http.Handler) http.Handler {

registry/storage/driver/middleware/cloudfront/middleware.go

@@ -18,7 +18,7 @@ import (
 	storagemiddleware "github.com/docker/distribution/registry/storage/driver/middleware"
 )
 
-// cloudFrontStorageMiddleware provides an simple implementation of layerHandler that
+// cloudFrontStorageMiddleware provides a simple implementation of layerHandler that
 // constructs temporary signed CloudFront URLs from the storagedriver layer URL,
 // then issues HTTP Temporary Redirects to this CloudFront content URL.
 type cloudFrontStorageMiddleware struct {

registry/storage/filereader_test.go

@@ -183,7 +183,7 @@ func TestFileReaderNonExistentFile(t *testing.T) {
 // conditions that can arise when reading a layer.
 func TestFileReaderErrors(t *testing.T) {
 	// TODO(stevvooe): We need to cover error return types, driven by the
-	// errors returned via the HTTP API. For now, here is a incomplete list:
+	// errors returned via the HTTP API. For now, here is an incomplete list:
 	//
 	// 	1. Layer Not Found: returned when layer is not found or access is
 	//        denied.

registry/storage/linkedblobstore.go

@@ -35,7 +35,7 @@ type linkedBlobStore struct {
 	// control the repository blob link set to which the blob store
 	// dispatches. This is required because manifest and layer blobs have not
 	// yet been fully merged. At some point, this functionality should be
-	// removed an the blob links folder should be merged. The first entry is
+	// removed the blob links folder should be merged. The first entry is
 	// treated as the "canonical" link location and will be used for writes.
 	linkPathFns []linkPathFunc