add imageFormt to API.md; add xz to Dockerfile; fix bugs

Signed-off-by: Liang Chenye <liangchenye@huawei.com>

Dockerfile

@@ -1,7 +1,7 @@
 FROM golang:1.5
 MAINTAINER Quentin Machu <quentin.machu@coreos.com>
 
-RUN apt-get update && apt-get install -y bzr rpm && apt-get autoremove -y && apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
+RUN apt-get update && apt-get install -y bzr rpm xz && apt-get autoremove -y && apt-get clean && rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
 
 RUN mkdir         /db
 VOLUME            /db

docs/API.md

@@ -112,7 +112,8 @@ It processes and inserts a new Layer in the database.
 |------|-----|-------------|
 |ID|String|Unique ID of the Layer|
 |Path|String|Absolute path or HTTP link pointing to the Layer's tar file|
-|ParentID|String|(Optionnal) Unique ID of the Layer's parent
+|ParentID|String|(Optional) Unique ID of the Layer's parent|
+|ImageFormat|String|Image format of the Layer ('Docker' or 'ACI')|
 
 If the Layer has not parent, the ParentID field should be omitted or empty.
 
@@ -346,7 +347,7 @@ It returns the lists of vulnerabilities which affect a given Layer.
 |Name|Type|Description|
 |------|-----|-------------|
 |ID|String|Unique ID of the Layer|
-|minimumPriority|Priority|(Optionnal) The minimum priority of the returned vulnerabilities. Defaults to High|
+|minimumPriority|Priority|(Optional) The minimum priority of the returned vulnerabilities. Defaults to High|
 
 ### Example
 
@@ -389,7 +390,7 @@ It returns the lists of vulnerabilities which are introduced and removed by the
 |Name|Type|Description|
 |------|-----|-------------|
 |ID|String|Unique ID of the Layer|
-|minimumPriority|Priority|(Optionnal) The minimum priority of the returned vulnerabilities|
+|minimumPriority|Priority|(Optional) The minimum priority of the returned vulnerabilities|
 
 ### Example
 
@@ -436,7 +437,7 @@ Counterintuitively, this request is actually a POST to be able to pass a lot of
 |Name|Type|Description|
 |------|-----|-------------|
 |LayersIDs|Array of strings|Unique IDs of Layers|
-|minimumPriority|Priority|(Optionnal) The minimum priority of the returned vulnerabilities. Defaults to High|
+|minimumPriority|Priority|(Optional) The minimum priority of the returned vulnerabilities. Defaults to High|
 
 ### Example
 

worker/detectors/data/aci.go

@@ -30,17 +30,12 @@ func init() {
 }
 
 func (detector *ACIDataDetector) Supported(path string, format string) bool {
-	switch format {
-	case "":
-		if strings.HasSuffix(path, ".aci") {
-			return true
-		}
-	case "aci":
+	if strings.EqualFold(format, "ACI") {
 		return true
 	}
 	return false
 }
 
 func (detector *ACIDataDetector) Detect(layerReader io.ReadCloser, toExtract []string, maxFileSize int64) (map[string][]byte, error) {
-	return utils.SelectivelyExtractArchive(layerReader, "./rootfs/", toExtract, maxFileSize)
+	return utils.SelectivelyExtractArchive(layerReader, "rootfs/", toExtract, maxFileSize)
 }

worker/detectors/data/docker.go

@@ -22,25 +22,20 @@ import (
 	"github.com/coreos/clair/worker/detectors"
 )
 
-// TarDataDetector implements DataDetector and detects layer data in 'tar' format
-type TarDataDetector struct{}
+// DockerDataDetector implements DataDetector and detects layer data in 'Docker' format
+type DockerDataDetector struct{}
 
 func init() {
-	detectors.RegisterDataDetector("tar", &TarDataDetector{})
+	detectors.RegisterDataDetector("Docker", &DockerDataDetector{})
 }
 
-func (detector *TarDataDetector) Supported(path string, format string) bool {
-	switch format {
-	case "":
-		if strings.HasSuffix(path, ".tar") || strings.HasSuffix(path, ".tar.gz") {
-			return true
-		}
-	case "tar":
+func (detector *DockerDataDetector) Supported(path string, format string) bool {
+	if strings.EqualFold(format, "Docker") {
 		return true
 	}
 	return false
 }
 
-func (detector *TarDataDetector) Detect(layerReader io.ReadCloser, toExtract []string, maxFileSize int64) (map[string][]byte, error) {
+func (detector *DockerDataDetector) Detect(layerReader io.ReadCloser, toExtract []string, maxFileSize int64) (map[string][]byte, error) {
 	return utils.SelectivelyExtractArchive(layerReader, "", toExtract, maxFileSize)
 }

worker/worker.go

@@ -49,6 +49,9 @@ var (
 
 	// SupportedOS is the list of operating system names that the worker supports.
 	SupportedOS = []string{"debian", "ubuntu", "centos"}
+
+	// SupportedImageFormat is the list of image formats that the worker supports.
+	SupportedImageFormat = []string{"Docker", "ACI"}
 )
 
 // Process detects the OS of a layer, the packages it installs/removes, and
@@ -60,8 +63,22 @@ func Process(ID, parentID, path string, imageFormat string) error {
 	if path == "" {
 		return cerrors.NewBadRequestError("could not process a layer which does not have a path")
 	}
+	if imageFormat == "" {
+		return cerrors.NewBadRequestError("could not process a layer which does not have a specified format")
+	} else {
+		isSupported := false
+		for _, format := range SupportedImageFormat {
+			if strings.EqualFold(imageFormat, format) {
+				isSupported = true
+				break
+			}
+		}
+		if !isSupported {
+			return cerrors.NewBadRequestError("could not process a layer which does not have a supported format")
+		}
+	}
 
-	log.Debugf("layer %s: processing (Location: %s, Engine version: %d, Parent: %s, format: %s)", ID, utils.CleanURL(path), Version, parentID, imageFormat)
+	log.Debugf("layer %s: processing (Location: %s, Engine version: %d, Parent: %s, Format: %s)", ID, utils.CleanURL(path), Version, parentID, imageFormat)
 
 	// Check to see if the layer is already in the database.
 	layer, err := database.FindOneLayerByID(ID, []string{database.FieldLayerEngineVersion})