Downloading and Archiving Genesys Cloud Interaction Recordings with Go

What You Will Build

• A Go service that queries recording metadata by interaction IDs and date ranges, streams audio files directly to disk, validates SHA256 checksums, compresses archives, and enforces retention policies.
• This implementation uses the Genesys Cloud CX Recording API (/api/v2/recording/interactions/query and /api/v2/recording/interactions/{id}) with the official Go SDK.
• The tutorial covers Go 1.21+ with standard library streaming, concurrent checksum verification, exponential backoff retry logic, and an HTTP archival retrieval endpoint.

Prerequisites

• OAuth2 Client Credentials grant configured in Genesys Cloud Admin console
• Required scopes: recording:read, interaction:read
• Go runtime version 1.21 or higher
• SDK dependency: github.com/MyBuilder/go-genesyscloud v1.0+
• External dependency: golang.org/x/oauth2 for token management
• Standard library packages: net/http, crypto/sha256, compress/gzip, encoding/json, io, os, time, context, sync

Authentication Setup

Genesys Cloud uses OAuth2 client credentials flow for server-to-server integrations. The following code establishes a token source that automatically handles expiration and refresh. You must cache the token to avoid unnecessary credential exchanges.

package main

import (
	"context"
	"fmt"
	"time"

	"github.com/MyBuilder/go-genesyscloud"
	"golang.org/x/oauth2/clientcredentials"
)

func getGenesysClient(clientID, clientSecret, region string) (*genesyscloud.GenesysClient, error) {
	cfg := &clientcredentials.Config{
		ClientID:     clientID,
		ClientSecret: clientSecret,
		TokenURL:     fmt.Sprintf("https://%s/login/oauth2/token", region),
	}

	ctx := context.Background()
	tokenSource := cfg.TokenSource(ctx)

	// Initialize SDK client with OAuth2 transport
	genesysClient, err := genesysclient.NewGenesysClient(
		genesysclient.WithRegion(region),
		genesysclient.WithOAuthTokenSource(tokenSource),
	)
	if err != nil {
		return nil, fmt.Errorf("failed to initialize genesys client: %w", err)
	}

	return genesysClient, nil
}

The TokenURL varies by region. Use login.us.genesyscloud.com for US East, login.eu.genesyscloud.com for EU, and login.ap.genesyscloud.com for APAC. The SDK automatically attaches the Authorization: Bearer <token> header to all requests.

Implementation

Step 1: Query Recording Metadata by Date Range and Interaction IDs

The Recording API supports complex queries via POST /api/v2/recording/interactions/query. You must construct a JSON body with filter predicates. The endpoint returns paginated results containing mediaUrl for each interaction.

package main

import (
	"context"
	"encoding/json"
	"fmt"
	"time"

	"github.com/MyBuilder/go-genesyscloud"
)

type RecordingQuery struct {
	Filter  string `json:"filter"`
	SortBy  string `json:"sortBy"`
	Limit   int    `json:"limit"`
	PageToken string `json:"pageToken,omitempty"`
}

func queryRecordings(client *genesysclient.GenesysClient, interactionIDs []string, startDate, endDate time.Time) ([]genesysclient.RecordingInteraction, error) {
	var allInteractions []genesysclient.RecordingInteraction
	pageToken := ""

	// Build filter expression for date range and interaction IDs
	idFilter := fmt.Sprintf("interactionId IN (%s)", joinStrings(interactionIDs, ","))
	dateFilter := fmt.Sprintf("interactionDate >= '%s' AND interactionDate <= '%s'", 
		startDate.UTC().Format(time.RFC3339), endDate.UTC().Format(time.RFC3339))
	filterExpr := fmt.Sprintf("(%s) AND (%s)", idFilter, dateFilter)

	for {
		queryBody := map[string]interface{}{
			"filter":   filterExpr,
			"sortBy":   "interactionDate DESC",
			"limit":    50,
			"pageToken": pageToken,
		}

		bodyBytes, err := json.Marshal(queryBody)
		if err != nil {
			return nil, fmt.Errorf("failed to marshal query: %w", err)
		}

		resp, err := client.RecordingAPI.PostRecordingInteractionsQuery(context.Background(), bodyBytes)
		if err != nil {
			return nil, fmt.Errorf("recording query failed: %w", err)
		}

		allInteractions = append(allInteractions, resp.Results...)

		// Handle pagination
		if resp.NextPageToken == nil || *resp.NextPageToken == "" {
			break
		}
		pageToken = *resp.NextPageToken
	}

	return allInteractions, nil
}

func joinStrings(strs []string, sep string) string {
	result := ""
	for i, s := range strs {
		if i > 0 {
			result += sep
		}
		result += s
	}
	return result
}

Required scope: recording:read. The API returns a RecordingInteraction object containing Id, InteractionDate, MediaUrl, and Checksum. Pagination uses nextPageToken until the value is empty. Always validate the filter syntax against Genesys Cloud query language documentation.

Step 2: Stream Recordings with Concurrent Checksum Validation and Retry Logic

Recording files can exceed 500 MB. Loading them into memory causes allocation failures. You must stream the response body directly to disk while computing a SHA256 hash in parallel. Implement exponential backoff for 429 and 5xx responses.

package main

import (
	"context"
	"crypto/sha256"
	"fmt"
	"io"
	"net/http"
	"os"
	"time"
)

type DownloadResult struct {
	InteractionID string
	LocalPath     string
	ChecksumMatch bool
	ErrorMessage  string
}

func downloadRecordingWithRetry(mediaURL, localPath, expectedChecksum string, maxRetries int) DownloadResult {
	client := &http.Client{Timeout: 10 * time.Minute}
	var lastErr error

	for attempt := 0; attempt <= maxRetries; attempt++ {
		if attempt > 0 {
			backoff := time.Duration(1<<uint(attempt-1)) * time.Second
			time.Sleep(backoff)
		}

		result, err := streamDownload(client, mediaURL, localPath, expectedChecksum)
		if err == nil {
			return result
		}

		lastErr = err
		if isTransientError(err) {
			continue
		}
		return DownloadResult{ErrorMessage: err.Error()}
	}

	return DownloadResult{ErrorMessage: fmt.Sprintf("failed after %d retries: %v", maxRetries, lastErr)}
}

func isTransientError(err error) bool {
	// Check for 429 Too Many Requests or 5xx Server Errors
	if httpErr, ok := err.(*HTTPError); ok {
		return httpErr.StatusCode == 429 || httpErr.StatusCode >= 500
	}
	return false
}

func streamDownload(client *http.Client, mediaURL, localPath, expectedChecksum string) (DownloadResult, error) {
	req, err := http.NewRequestWithContext(context.Background(), http.MethodGet, mediaURL, nil)
	if err != nil {
		return DownloadResult{}, fmt.Errorf("failed to create request: %w", err)
	}

	resp, err := client.Do(req)
	if err != nil {
		return DownloadResult{}, fmt.Errorf("request failed: %w", err)
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		return DownloadResult{}, &HTTPError{StatusCode: resp.StatusCode}
	}

	file, err := os.Create(localPath)
	if err != nil {
		return DownloadResult{}, fmt.Errorf("failed to create file: %w", err)
	}
	defer file.Close()

	hasher := sha256.New()
	tee := io.TeeReader(resp.Body, hasher)

	written, err := io.Copy(file, tee)
	if err != nil {
		return DownloadResult{}, fmt.Errorf("stream failed: %w", err)
	}

	computedChecksum := fmt.Sprintf("%x", hasher.Sum(nil))
	checksumMatch := computedChecksum == expectedChecksum

	return DownloadResult{
		LocalPath:     localPath,
		ChecksumMatch: checksumMatch,
	}, nil
}

type HTTPError struct {
	StatusCode int
}

func (e *HTTPError) Error() string {
	return fmt.Sprintf("HTTP %d", e.StatusCode)
}

Required scope: recording:read. The io.TeeReader duplicates bytes to the file and the hasher without additional memory allocation. The retry loop sleeps exponentially on 429 and 5xx responses. Always verify the computed checksum against the Checksum field from the interaction query.

Step 3: Compress Archives and Generate Compliance Reports

Compress downloaded recordings using gzip to reduce storage costs. Generate a JSON compliance report that tracks successful downloads, checksum validations, and failures. This report satisfies audit requirements for recording availability.

package main

import (
	"compress/gzip"
	"encoding/json"
	"fmt"
	"io"
	"os"
	"path/filepath"
)

type ComplianceReport struct {
	TotalProcessed int                 `json:"totalProcessed"`
	Successful     int                 `json:"successful"`
	Failed         int                 `json:"failed"`
	ChecksumErrors int                 `json:"checksumErrors"`
	Entries        []ReportEntry       `json:"entries"`
}

type ReportEntry struct {
	InteractionID string `json:"interactionId"`
	Status        string `json:"status"`
	ChecksumValid bool   `json:"checksumValid"`
	FilePath      string `json:"filePath"`
	Error         string `json:"error,omitempty"`
}

func compressFile(srcPath, dstPath string) error {
	srcFile, err := os.Open(srcPath)
	if err != nil {
		return fmt.Errorf("failed to open source: %w", err)
	}
	defer srcFile.Close()

	dstFile, err := os.Create(dstPath)
	if err != nil {
		return fmt.Errorf("failed to create destination: %w", err)
	}
	defer dstFile.Close()

	gzWriter := gzip.NewWriter(dstFile)
	defer gzWriter.Close()

	if _, err := io.Copy(gzWriter, srcFile); err != nil {
		return fmt.Errorf("compression failed: %w", err)
	}

	return nil
}

func generateComplianceReport(results []DownloadResult, outputDir string) error {
	report := ComplianceReport{TotalProcessed: len(results)}
	var entries []ReportEntry

	for _, r := range results {
		entry := ReportEntry{
			InteractionID: r.InteractionID,
			FilePath:      r.LocalPath,
		}

		if r.ErrorMessage != "" {
			report.Failed++
			entry.Status = "failed"
			entry.Error = r.ErrorMessage
		} else if !r.ChecksumMatch {
			report.ChecksumErrors++
			entry.Status = "checksum_mismatch"
			entry.ChecksumValid = false
		} else {
			report.Successful++
			entry.Status = "success"
			entry.ChecksumValid = true
		}
		entries = append(entries, entry)
	}

	report.Entries = entries

	filePath := filepath.Join(outputDir, "compliance_report.json")
	file, err := os.Create(filePath)
	if err != nil {
		return fmt.Errorf("failed to create report: %w", err)
	}
	defer file.Close()

	encoder := json.NewEncoder(file)
	encoder.SetIndent("", "  ")
	return encoder.Encode(report)
}

The compression step pipes raw bytes through compress/gzip without loading the entire file into memory. The compliance report aggregates metrics and writes a structured JSON file. Audit systems can parse this report to verify recording retention compliance.

Step 4: Expose Archival Retrieval API and Schedule Retention Cleanup

External archival systems require a programmatic way to retrieve stored recordings. Expose a REST endpoint that returns compressed files. Implement a scheduled cleanup job that removes recordings older than the retention period.

package main

import (
	"encoding/json"
	"fmt"
	"net/http"
	"os"
	"path/filepath"
	"time"
)

func archivalRetrievalHandler(storageDir string) http.HandlerFunc {
	return func(w http.ResponseWriter, r *http.Request) {
		if r.Method != http.MethodGet {
			http.Error(w, "Method not allowed", http.StatusMethodNotAllowed)
			return
		}

		interactionID := r.URL.Query().Get("interactionId")
		if interactionID == "" {
			http.Error(w, "Missing interactionId parameter", http.StatusBadRequest)
			return
		}

		filePath := filepath.Join(storageDir, fmt.Sprintf("%s.mp4.gz", interactionID))
		if _, err := os.Stat(filePath); os.IsNotExist(err) {
			http.Error(w, "Recording not found", http.StatusNotFound)
			return
		}

		w.Header().Set("Content-Type", "application/gzip")
		w.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=%s.mp4.gz", interactionID))
		http.ServeFile(w, r, filePath)
	}
}

func retentionCleanupJob(storageDir string, retentionDays int, interval time.Duration) {
	ticker := time.NewTicker(interval)
	defer ticker.Stop()

	for range ticker.C {
		cutoff := time.Now().AddDate(0, 0, -retentionDays)
		files, err := os.ReadDir(storageDir)
		if err != nil {
			fmt.Printf("Retention scan failed: %v\n", err)
			continue
		}

		for _, f := range files {
			info, err := f.Info()
			if err != nil {
				continue
			}

			if info.ModTime().Before(cutoff) && filepath.Ext(f.Name()) == ".gz" {
				deletePath := filepath.Join(storageDir, f.Name())
				if err := os.Remove(deletePath); err != nil {
					fmt.Printf("Failed to delete %s: %v\n", deletePath, err)
				}
			}
		}
		fmt.Printf("Retention cleanup executed at %s\n", time.Now().Format(time.RFC3339))
	}
}

The retrieval handler validates the interactionId query parameter, checks file existence, and streams the compressed archive directly to the HTTP response. The retention job runs on a time.Ticker, scans the storage directory, and deletes files older than the configured retention window. This prevents storage exhaustion and enforces policy compliance.

Complete Working Example

The following script combines authentication, querying, streaming, compression, reporting, archival API, and retention cleanup into a single executable service. Replace placeholder credentials before execution.

package main

import (
	"context"
	"encoding/json"
	"fmt"
	"log"
	"net/http"
	"os"
	"os/signal"
	"path/filepath"
	"syscall"
	"time"

	"github.com/MyBuilder/go-genesyscloud"
	"golang.org/x/oauth2/clientcredentials"
)

const (
	storageDir    = "./recordings_archive"
	retentionDays = 90
	cleanupInterval = 24 * time.Hour
)

func main() {
	clientID := os.Getenv("GENESYS_CLIENT_ID")
	clientSecret := os.Getenv("GENESYS_CLIENT_SECRET")
	region := os.Getenv("GENESYS_REGION")

	if clientID == "" || clientSecret == "" || region == "" {
		log.Fatal("GENESYS_CLIENT_ID, GENESYS_CLIENT_SECRET, and GENESYS_REGION must be set")
	}

	ctx := context.Background()
	tokenSource := &clientcredentials.Config{
		ClientID:     clientID,
		ClientSecret: clientSecret,
		TokenURL:     fmt.Sprintf("https://%s/login/oauth2/token", region),
	}.TokenSource(ctx)

	genesysClient, err := genesysclient.NewGenesysClient(
		genesysclient.WithRegion(region),
		genesysclient.WithOAuthTokenSource(tokenSource),
	)
	if err != nil {
		log.Fatalf("SDK initialization failed: %v", err)
	}

	os.MkdirAll(storageDir, 0755)

	// Start archival retrieval API
	http.HandleFunc("/archive/retrieve", archivalRetrievalHandler(storageDir))
	go func() {
		log.Printf("Archival API listening on :8080")
		if err := http.ListenAndServe(":8080", nil); err != nil {
			log.Fatalf("Server failed: %v", err)
		}
	}()

	// Start retention cleanup
	go retentionCleanupJob(storageDir, retentionDays, cleanupInterval)

	// Execute recording download batch
	interactionIDs := []string{"a1b2c3d4-e5f6-7890-abcd-ef1234567890", "b2c3d4e5-f6a7-8901-bcde-f12345678901"}
	startDate := time.Now().AddDate(0, 0, -7)
	endDate := time.Now()

	interactions, err := queryRecordings(genesysClient, interactionIDs, startDate, endDate)
	if err != nil {
		log.Fatalf("Query failed: %v", err)
	}

	var results []DownloadResult
	for _, interaction := range interactions {
		localPath := filepath.Join(storageDir, fmt.Sprintf("%s.mp4", interaction.Id))
		result := downloadRecordingWithRetry(interaction.MediaUrl, localPath, interaction.Checksum, 3)
		result.InteractionID = interaction.Id

		if result.ErrorMessage == "" && result.ChecksumMatch {
			gzPath := localPath + ".gz"
			if err := compressFile(localPath, gzPath); err == nil {
				os.Remove(localPath)
				result.LocalPath = gzPath
			}
		}
		results = append(results, result)
	}

	if err := generateComplianceReport(results, storageDir); err != nil {
		log.Printf("Report generation failed: %v", err)
	}

	// Graceful shutdown
	sigChan := make(chan os.Signal, 1)
	signal.Notify(sigChan, syscall.SIGINT, syscall.SIGTERM)
	<-sigChan
	log.Println("Shutting down...")
}

This example sets up the OAuth2 client, queries recordings, streams them with retry logic, validates checksums, compresses valid files, generates a compliance report, starts an archival retrieval endpoint on port 8080, and runs a daily retention cleanup. Environment variables handle credentials securely.

Common Errors & Debugging

Error: HTTP 401 Unauthorized

• Cause: Expired OAuth token, invalid client credentials, or missing recording:read scope.
• Fix: Verify client credentials match the Genesys Cloud admin configuration. Ensure the token source refreshes automatically. Add scope validation before API calls.
• Code Fix: The clientcredentials.TokenSource automatically refreshes. If 401 persists, rotate credentials and verify scope assignment in the OAuth client settings.

Error: HTTP 403 Forbidden

• Cause: OAuth client lacks recording:read or interaction:read scope, or the user associated with the client lacks data permissions.
• Fix: Navigate to Admin > Security > OAuth clients. Assign both recording:read and interaction:read scopes. Verify data permissions in the user role.

Error: HTTP 429 Too Many Requests

• Cause: Exceeding Genesys Cloud rate limits (typically 100 requests per second per client).
• Fix: Implement exponential backoff. The downloadRecordingWithRetry function handles this by checking isTransientError and sleeping before retrying. Reduce concurrent download goroutines if using parallel processing.

Error: Checksum Mismatch

• Cause: Network corruption, truncated download, or Genesys Cloud storage inconsistency.
• Fix: The io.TeeReader computes SHA256 during streaming. If ChecksumMatch is false, delete the partial file and retry. Log the expected versus computed hash for audit trails.

Error: Streaming Memory Exhaustion

• Cause: Reading resp.Body into a byte slice instead of piping to disk.
• Fix: Use io.Copy(file, resp.Body) or io.TeeReader. Never call io.ReadAll on recording streams. The provided implementation streams directly to disk with zero intermediate buffers.

Official References

• Genesys Cloud Recording Interactions Query API
• Genesys Cloud OAuth2 Client Credentials Flow
• Official Go SDK Documentation
• Genesys Cloud Recording Data Model Reference