feat: use v2 API if available

This patch adds support for using the new v2 API by default, and
falling back to v1. This shouldn't be a breaking change until we remove
support for the v1 API

Signed-off-by: Rob Cresswell <robcresswell@users.noreply.github.com>

go.mod

@@ -5,6 +5,7 @@ go 1.20
 require (
 	github.com/adrg/xdg v0.4.0
 	github.com/aws/aws-sdk-go v1.44.163
+	github.com/h2non/gock v1.2.0
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/spf13/cobra v1.6.1
 	github.com/spf13/viper v1.14.0
@@ -16,6 +17,7 @@ require (
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/fsnotify/fsnotify v1.6.0 // indirect
+	github.com/h2non/parth v0.0.0-20190131123155-b4df798d6542 // indirect
 	github.com/hashicorp/hcl v1.0.0 // indirect
 	github.com/inconshreveable/mousetrap v1.0.1 // indirect
 	github.com/jmespath/go-jmespath v0.4.0 // indirect

go.sum

@@ -122,6 +122,10 @@ github.com/google/uuid v1.1.2/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+
 github.com/googleapis/gax-go/v2 v2.0.4/go.mod h1:0Wqv26UfaUD9n4G6kQubkQ+KchISgw+vpHVxEJEs9eg=
 github.com/googleapis/gax-go/v2 v2.0.5/go.mod h1:DWXyrwAJ9X0FpwwEdw+IPEYBICEFu5mhpdKc/us6bOk=
 github.com/googleapis/google-cloud-go-testing v0.0.0-20200911160855-bcd43fbb19e8/go.mod h1:dvDLG8qkwmyD9a/MJJN3XJcT3xFxOKAvTZGvuZmac9g=
+github.com/h2non/gock v1.2.0 h1:K6ol8rfrRkUOefooBC8elXoaNGYkpp7y2qcxGG6BzUE=
+github.com/h2non/gock v1.2.0/go.mod h1:tNhoxHYW2W42cYkYb1WqzdbYIieALC99kpYr7rH/BQk=
+github.com/h2non/parth v0.0.0-20190131123155-b4df798d6542 h1:2VTzZjLZBgl62/EtslCrtky5vbi9dd7HrQPQIx6wqiw=
+github.com/h2non/parth v0.0.0-20190131123155-b4df798d6542/go.mod h1:Ow0tF8D4Kplbc8s8sSb3V2oUCygFHVp8gC3Dn6U4MNI=
 github.com/hashicorp/golang-lru v0.5.0/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
 github.com/hashicorp/golang-lru v0.5.1/go.mod h1:/m3WP610KZHVQ1SGc6re/UDhFvYD7pJ4Ao+sR/qLZy8=
 github.com/hashicorp/hcl v1.0.0 h1:0Anlzjpi4vEasTeNFn2mLJgTSwt0+6sfsiTG8qcWGx4=
@@ -149,6 +153,8 @@ github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG
 github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
 github.com/mitchellh/mapstructure v1.5.0 h1:jeMsZIYE/09sWLaz43PL7Gy6RuMjD2eJVyuac5Z2hdY=
 github.com/mitchellh/mapstructure v1.5.0/go.mod h1:bFUtVrKA4DC2yAKiSyO/QUcy7e+RRV2QTWOzhPopBRo=
+github.com/nbio/st v0.0.0-20140626010706-e9e8d9816f32 h1:W6apQkHrMkS0Muv8G/TipAy/FJl/rCYT0+EuS8+Z0z4=
+github.com/nbio/st v0.0.0-20140626010706-e9e8d9816f32/go.mod h1:9wM+0iRr9ahx58uYLpLIr5fm8diHn0JbqRycJi6w0Ms=
 github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e h1:fD57ERR4JtEqsWbfPhv4DMiApHyliiK5xCTNVSPiaAs=
 github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e/go.mod h1:zD1mROLANZcx1PVRCS0qkT7pwLkGfwJo4zjcN/Tysno=
 github.com/pelletier/go-toml v1.9.5 h1:4yBQzkHv+7BHq2PQUZF3Mx0IYxG7LsP222s7Agd3ve8=

pkg/reporter/reporter.go

@@ -6,72 +6,164 @@ import (
 	"crypto/tls"
 	"encoding/json"
 	"fmt"
+	"io"
 	"net/http"
 	"net/url"
 	"time"
 
+	"github.com/h2non/gock"
+
 	"github.com/anchore/ecs-inventory/internal/logger"
 	"github.com/anchore/ecs-inventory/internal/tracker"
 	"github.com/anchore/ecs-inventory/pkg/connection"
 )
 
-const ReportAPIPath = "v1/enterprise/ecs-inventory"
+const v1ReportAPIPath = "v1/enterprise/ecs-inventory"
+const v2ReportAPIPath = "v2/ecs-inventory"
+
+var apiPath = v2ReportAPIPath
 
-// This method does the actual Reporting (via HTTP) to Anchore
-//
-//nolint:gosec
 func Post(report Report, anchoreDetails connection.AnchoreInfo) error {
+	logger.Log.Info("Reporting results to Anchore")
 	defer tracker.TrackFunctionTime(time.Now(), fmt.Sprintf("Posting Inventory Report for cluster %s", report.ClusterARN))
-	logger.Log.Info("Reporting results to Anchore", "Account", anchoreDetails.Account)
 	tr := &http.Transport{
 		TLSClientConfig: &tls.Config{InsecureSkipVerify: anchoreDetails.HTTP.Insecure},
-	}
+	} // #nosec G402
 	client := &http.Client{
 		Transport: tr,
 		Timeout:   time.Duration(anchoreDetails.HTTP.TimeoutSeconds) * time.Second,
 	}
+	gock.InterceptClient(client)
+
+	req, err := prepareRequest(report, anchoreDetails)
+
+	if err != nil {
+		return err
+	}
+
+	resp, err := client.Do(req)
+	if err != nil {
+		if resp != nil && resp.StatusCode == 401 {
+			return fmt.Errorf("failed to report data to Anchore, check credentials: %w", err)
+		}
+		return fmt.Errorf("failed to report data to Anchore: %w", err)
+	}
+	defer resp.Body.Close()
+
+	// If we get a 404, make an assumption that the backend API support may have
+	// changed, either because our default v2 is too new or because the API
+	// service has been upgraded. Check the version, and if the version changes,
+	// cache it and retry the request
+	if resp.StatusCode == 404 {
+		previousAPIPath := apiPath
+		apiPath, err = fetchVersionedAPIPath(anchoreDetails)
+		if err != nil {
+			return fmt.Errorf("failed to validate Enterprise API: %w", err)
+		}
+		apiEndpoint, err := url.JoinPath(anchoreDetails.URL, apiPath)
+		if err != nil {
+			return fmt.Errorf("failed to parse API URL: %w", err)
+		}
+
+		if apiPath != previousAPIPath {
+			logger.Log.Info("Retrying inventory report with new endpoint", "apiEndpoint", apiEndpoint)
+			return Post(report, anchoreDetails)
+		}
+
+		return fmt.Errorf("failed to report data to Anchore: %+v", resp)
+	}
+
+	if resp.StatusCode < 200 || resp.StatusCode > 299 {
+		return fmt.Errorf("failed to report data to Anchore: %+v", resp)
+	}
+
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return fmt.Errorf("failed to read response from Anchore: %w", err)
+	}
+	if len(respBody) > 0 && !json.Valid(respBody) {
+		logger.Log.Debug("Anchore response body: ", string(respBody))
+		return fmt.Errorf("failed to report data to Anchore not a valid json response: %+v", resp)
+	}
+	logger.Log.Debug("Successfully reported results to Anchore")
+	return nil
+}
 
-	anchoreURL, err := buildURL(anchoreDetails)
+func prepareRequest(report Report, anchoreDetails connection.AnchoreInfo) (*http.Request, error) {
+	apiEndpoint, err := url.JoinPath(anchoreDetails.URL, apiPath)
 	if err != nil {
-		return fmt.Errorf("failed to build url: %w", err)
+		return nil, fmt.Errorf("failed to parse API URL: %w", err)
 	}
+	logger.Log.Debug("Reporting results to Anchore", "Endpoint", apiEndpoint)
 
 	reqBody, err := json.Marshal(report)
 	if err != nil {
-		return fmt.Errorf("failed to serialize results as JSON: %w", err)
+		return nil, fmt.Errorf("failed to serialize results as JSON: %w", err)
 	}
 
-	req, err := http.NewRequest("POST", anchoreURL, bytes.NewBuffer(reqBody))
+	req, err := http.NewRequest("POST", apiEndpoint, bytes.NewBuffer(reqBody))
 	if err != nil {
-		return fmt.Errorf("failed to build request to report data to Anchore: %w", err)
+		return nil, fmt.Errorf("failed to build request to report data to Anchore: %w", err)
 	}
 	req.SetBasicAuth(anchoreDetails.User, anchoreDetails.Password)
 	req.Header.Set("Content-Type", "application/json")
 	req.Header.Set("x-anchore-account", anchoreDetails.Account)
-	resp, err := client.Do(req)
+
+	return req, nil
+}
+
+type AnchoreVersion struct {
+	API struct {
+		Version string `json:"version"`
+	} `json:"api"`
+	DB struct {
+		SchemaVersion string `json:"schema_version"`
+	} `json:"db"`
+	Service struct {
+		Version string `json:"version"`
+	} `json:"service"`
+}
+
+func fetchVersionedAPIPath(anchoreDetails connection.AnchoreInfo) (string, error) {
+	logger.Log.Debug("Detecting Anchore API version")
+	tr := &http.Transport{
+		TLSClientConfig: &tls.Config{InsecureSkipVerify: anchoreDetails.HTTP.Insecure},
+	} // #nosec G402
+	client := &http.Client{
+		Transport: tr,
+		Timeout:   time.Duration(anchoreDetails.HTTP.TimeoutSeconds) * time.Second,
+	}
+	gock.InterceptClient(client) // Required to use gock for testing custom client
+
+	versionEndpoint, err := url.JoinPath(anchoreDetails.URL, "version")
 	if err != nil {
-		if resp != nil {
-			if resp.StatusCode == 401 {
-				return fmt.Errorf("failed to report data to Anchore, check credentials: %w", err)
-			}
-		}
-		return fmt.Errorf("failed to report data to Anchore: %w", err)
+		return v1ReportAPIPath, fmt.Errorf("failed to parse API URL: %w", err)
+	}
+
+	resp, err := client.Get(versionEndpoint)
+	if err != nil {
+		return v1ReportAPIPath, fmt.Errorf("failed to contact Anchore API: %w", err)
 	}
 	defer resp.Body.Close()
-	if resp.StatusCode < 200 || resp.StatusCode > 299 {
-		return fmt.Errorf("failed to report data to Anchore: %+v", resp)
+	if resp.StatusCode != 200 {
+		return v1ReportAPIPath, fmt.Errorf("failed to retrieve Anchore API version: %+v", resp)
+	}
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return v1ReportAPIPath, fmt.Errorf("failed to read Anchore API version: %w", err)
 	}
-	logger.Log.Debug("Successfully reported results to Anchore", "Account", anchoreDetails.Account)
-	return nil
-}
 
-func buildURL(anchoreDetails connection.AnchoreInfo) (string, error) {
-	anchoreURL, err := url.Parse(anchoreDetails.URL)
+	ver := AnchoreVersion{}
+	err = json.Unmarshal(body, &ver)
 	if err != nil {
-		return "", err
+		return v1ReportAPIPath, fmt.Errorf("failed to parse API version: %w", err)
 	}
 
-	anchoreURL.Path += ReportAPIPath
+	logger.Log.Debugf("Anchore API version: %v", ver)
+
+	if ver.API.Version == "2" {
+		return v2ReportAPIPath, nil
+	}
 
-	return anchoreURL.String(), nil
+	return v1ReportAPIPath, nil
 }