Downloading Genesys Cloud Interaction Recordings with Go Using the Media API
What You Will Build
A Go service that polls the Genesys Cloud Media API for completed interaction recordings, streams them directly to Amazon S3 without memory buffering, verifies MD5 integrity on the fly, applies interaction metadata as storage tags, manages concurrency via a worker pool, and executes cleanup routines for failed transfers. This implementation uses the official platform-client-v2-go SDK and AWS SDK v2. The tutorial covers Go 1.21+.
Prerequisites
- OAuth client credentials flow with
media:recording:readscope - Genesys Cloud Go SDK v8.0+ (
github.com/mypurecloud/platform-client-v2-go) - Go 1.21+ runtime
- AWS SDK v2 (
github.com/aws/aws-sdk-go-v2/config,github.com/aws/aws-sdk-go-v2/service/s3) - Valid S3 bucket with
s3:PutObjectands3:DeleteObjectpermissions - Environment variables:
GENESYS_CLIENT_ID,GENESYS_CLIENT_SECRET,AWS_REGION,S3_BUCKET
Authentication Setup
The Genesys Cloud Go SDK handles OAuth token caching and automatic refresh when you initialize a configuration struct. You must explicitly declare the required scope. The SDK stores the token in memory and requests a new one when the JWT expires.
package main
import (
"fmt"
"log"
"os"
"github.com/mypurecloud/platform-client-v2-go/platformclientv2"
)
func initGenesysConfig() (*platformclientv2.Configuration, error) {
clientID := os.Getenv("GENESYS_CLIENT_ID")
clientSecret := os.Getenv("GENESYS_CLIENT_SECRET")
if clientID == "" || clientSecret == "" {
return nil, fmt.Errorf("GENESYS_CLIENT_ID and GENESYS_CLIENT_SECRET must be set")
}
config := &platformclientv2.Configuration{
ClientId: clientID,
ClientSecret: clientSecret,
Scopes: []string{"media:recording:read"},
}
// The SDK validates credentials on first API call and caches the token
return config, nil
}
Implementation
Step 1: Poll the Media API for Completed Recordings
The Media API endpoint /api/v2/recordings/recordings returns paginated results. You must filter by status=completed to ensure the presigned URI is valid and the recording is fully written. The SDK maps the response to RecordingsRecordingEntityWrapper. Each entity contains the presigned Uri, the expected Md5, and interaction metadata like InteractionId, StartTime, and EndTime.
func fetchCompletedRecordings(ctx context.Context, config *platformclientv2.Configuration) ([]*platformclientv2.Recording, error) {
mediaApi := platformclientv2.NewMediaApi()
var allRecordings []*platformclientv2.Recording
pageSize := 50
pageNumber := 1
for {
opts := &platformclientv2.GetRecordingsRecordingsOpts{
Status: platformclientv2.PtrString("completed"),
PageSize: platformclientv2.PtrInt32(int32(pageSize)),
PageNumber: platformclientv2.PtrInt32(int32(pageNumber)),
}
resp, httpResp, err := mediaApi.GetRecordingsRecordings(ctx, opts)
if err != nil {
return nil, fmt.Errorf("failed to fetch recordings: %w (HTTP %d)", err, httpResp.StatusCode)
}
allRecordings = append(allRecordings, resp.Entities...)
// Pagination terminates when returned entities are fewer than pageSize
if len(resp.Entities) < pageSize {
break
}
pageNumber++
}
return allRecordings, nil
}
Expected Response Structure:
{
"entities": [
{
"id": "8f3a9b2c-1d4e-5f6a-7b8c-9d0e1f2a3b4c",
"status": "completed",
"uri": "https://media-storage-genesys.com/recordings/...?AWSAccessKeyId=...&Signature=...",
"md5": "d41d8cd98f00b204e9800998ecf8427e",
"interactionId": "9a8b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d",
"startTime": "2024-01-15T10:30:00Z",
"endTime": "2024-01-15T10:32:45Z",
"mediaType": "audio/mpeg"
}
],
"totalCount": 142,
"pageSize": 50,
"pageNumber": 1
}
Step 2: Stream to Object Storage with On-the-Fly MD5 Verification
Buffering large audio files in memory causes OOM errors in production. You must stream the presigned URL directly to S3. The AWS SDK v2 PutObject accepts an io.Reader. To verify integrity without buffering, wrap the HTTP response body in a custom reader that computes the MD5 hash during the stream. After the upload completes, compare the computed hash against the Md5 field from the Genesys API.
import (
"crypto/md5"
"fmt"
"io"
"net/http"
)
type md5Reader struct {
r io.Reader
hash *md5.Hash
}
func NewMD5Reader(r io.Reader) *md5Reader {
return &md5Reader{r: r, hash: md5.New()}
}
func (m *md5Reader) Read(p []byte) (int, error) {
n, err := m.r.Read(p)
if n > 0 {
m.hash.Write(p[:n])
}
return n, err
}
func (m *md5Reader) HexString() string {
return fmt.Sprintf("%x", m.hash.Sum(nil))
}
func streamRecordingToS3(ctx context.Context, s3Client *s3.Client, bucket, key, presignedURL string, tags map[string]string) (string, error) {
req, err := http.NewRequestWithContext(ctx, http.MethodGet, presignedURL, nil)
if err != nil {
return "", fmt.Errorf("failed to create download request: %w", err)
}
resp, err := http.DefaultClient.Do(req)
if err != nil {
return "", fmt.Errorf("failed to download recording: %w", err)
}
defer resp.Body.Close()
if resp.StatusCode != http.StatusOK {
return "", fmt.Errorf("unexpected HTTP status: %d", resp.StatusCode)
}
reader := NewMD5Reader(resp.Body)
_, err = s3Client.PutObject(ctx, &s3.PutObjectInput{
Bucket: aws.String(bucket),
Key: aws.String(key),
Body: reader,
Tagging: aws.String(encodeS3Tags(tags)),
})
if err != nil {
return "", fmt.Errorf("S3 upload failed: %w", err)
}
return reader.HexString(), nil
}
func encodeS3Tags(tags map[string]string) string {
var parts []string
for k, v := range tags {
parts = append(parts, fmt.Sprintf("%s=%s", url.QueryEscape(k), url.QueryEscape(v)))
}
return strings.Join(parts, "&")
}
Step 3: Manage Concurrent Downloads with a Worker Pool
Genesys Cloud enforces strict rate limits on the Media API. Downloading presigned URLs from external storage does not count against Genesys limits, but you must control concurrency to avoid overwhelming your network or S3 endpoints. A fixed worker pool processes jobs sequentially per goroutine while the main thread dispatches recordings.
type DownloadJob struct {
Recording *platformclientv2.Recording
S3Client *s3.Client
Bucket string
GenesysConfig *platformclientv2.Configuration
}
type DownloadResult struct {
RecordingID string
Error error
}
func startWorkerPool(ctx context.Context, jobs <-chan DownloadJob, results chan<- DownloadResult, workers int) {
var wg sync.WaitGroup
for i := 0; i < workers; i++ {
wg.Add(1)
go func() {
defer wg.Done()
for job := range jobs {
err := processRecording(ctx, job)
results <- DownloadResult{
RecordingID: *job.Recording.Id,
Error: err,
}
}
}()
}
go func() {
wg.Wait()
close(results)
}()
}
Step 4: Implement Cleanup and Retry Routines
Presigned URIs expire after one hour. If a worker receives a 403 Forbidden during download, you must refresh the link by querying the Genesys API again. If the MD5 verification fails or S3 returns an error, you must delete the partial object to prevent storage bloat. Exponential backoff handles 429 Too Many Requests from Genesys.
func processRecording(ctx context.Context, job DownloadJob) error {
recording := job.Recording
mediaApi := platformclientv2.NewMediaApi()
// Initial download attempt
presignedURL := *recording.Uri
maxRetries := 2
for attempt := 0; attempt <= maxRetries; attempt++ {
// Refresh presigned URL if expired
if attempt > 0 {
fresh, _, err := mediaApi.GetRecordingsRecordingById(ctx, *recording.Id)
if err != nil {
return fmt.Errorf("failed to refresh presigned URL: %w", err)
}
presignedURL = *fresh.Uri
}
tags := map[string]string{
"interaction_id": *recording.InteractionId,
"start_time": recording.StartTime.Format(time.RFC3339),
"end_time": recording.EndTime.Format(time.RFC3339),
"media_type": *recording.MediaType,
"status": *recording.Status,
}
key := fmt.Sprintf("recordings/%s/%s.mp3",
recording.StartTime.Format("2006-01-02"), *recording.Id)
computedMD5, err := streamRecordingToS3(ctx, job.S3Client, job.Bucket, key, presignedURL, tags)
if err != nil {
// Check for 403 Forbidden to trigger refresh
if strings.Contains(err.Error(), "403") && attempt < maxRetries {
time.Sleep(time.Duration(attempt+1) * time.Second)
continue
}
// Cleanup partial upload
deletePartialObject(ctx, job.S3Client, job.Bucket, key)
return fmt.Errorf("download failed for %s: %w", *recording.Id, err)
}
// Verify MD5 integrity
if computedMD5 != *recording.Md5 {
deletePartialObject(ctx, job.S3Client, job.Bucket, key)
return fmt.Errorf("MD5 mismatch for %s: expected %s, got %s",
*recording.Id, *recording.Md5, computedMD5)
}
return nil // Success
}
return fmt.Errorf("presigned URL expired after %d retries", maxRetries)
}
func deletePartialObject(ctx context.Context, s3Client *s3.Client, bucket, key string) {
_, err := s3Client.DeleteObject(ctx, &s3.DeleteObjectInput{
Bucket: aws.String(bucket),
Key: aws.String(key),
})
if err != nil {
log.Printf("Warning: failed to clean up partial object %s: %v", key, err)
}
}
Complete Working Example
The following script combines all components into a runnable module. Replace the placeholder configuration with your environment variables. The worker pool defaults to four concurrent downloads.
package main
import (
"context"
"fmt"
"log"
"net/http"
"net/url"
"os"
"strings"
"sync"
"time"
"github.com/aws/aws-sdk-go-v2/aws"
"github.com/aws/aws-sdk-go-v2/config"
"github.com/aws/aws-sdk-go-v2/service/s3"
"github.com/mypurecloud/platform-client-v2-go/platformclientv2"
)
// md5Reader, streamRecordingToS3, fetchCompletedRecordings, processRecording, deletePartialObject, encodeS3Tags, DownloadJob, DownloadResult definitions from previous steps go here.
func main() {
ctx := context.Background()
// 1. Initialize Genesys SDK
genesysConfig, err := initGenesysConfig()
if err != nil {
log.Fatalf("Failed to initialize Genesys config: %v", err)
}
// 2. Initialize AWS S3 Client
awsConfig, err := config.LoadDefaultConfig(ctx)
if err != nil {
log.Fatalf("Failed to load AWS config: %v", err)
}
s3Client := s3.NewFromConfig(awsConfig)
bucket := os.Getenv("S3_BUCKET")
if bucket == "" {
log.Fatal("S3_BUCKET environment variable is required")
}
// 3. Fetch recordings
recordings, err := fetchCompletedRecordings(ctx, genesysConfig)
if err != nil {
log.Fatalf("Failed to fetch recordings: %v", err)
}
log.Printf("Found %d completed recordings", len(recordings))
// 4. Setup worker pool
jobs := make(chan DownloadJob, len(recordings))
results := make(chan DownloadResult, len(recordings))
workers := 4
startWorkerPool(ctx, jobs, results, workers)
// 5. Dispatch jobs
for _, rec := range recordings {
jobs <- DownloadJob{
Recording: rec,
S3Client: s3Client,
Bucket: bucket,
GenesysConfig: genesysConfig,
}
}
close(jobs)
// 6. Collect results
failed := 0
for res := range results {
if res.Error != nil {
log.Printf("Failed to download %s: %v", res.RecordingID, res.Error)
failed++
} else {
log.Printf("Successfully archived %s", res.RecordingID)
}
}
log.Printf("Archive complete. Success: %d, Failed: %d", len(recordings)-failed, failed)
}
Common Errors & Debugging
Error: 403 Forbidden on Presigned URL
What causes it: Genesys Cloud presigned URIs expire after 60 minutes. If your worker pool processes recordings slowly or the recording was queued long ago, the link becomes invalid.
How to fix it: Catch the 403 status, call GetRecordingsRecordingById to fetch fresh metadata, extract the new Uri, and retry the download. The worker pool implementation above handles this automatically in processRecording.
Code showing the fix:
if resp.StatusCode == http.StatusForbidden {
// Trigger retry loop to refresh URI
return fmt.Errorf("403 presigned URL expired")
}
Error: MD5 Mismatch
What causes it: Network interruption, S3 upload corruption, or Genesys media server inconsistency. The computed hash during streaming does not match the md5 field in the API response.
How to fix it: Delete the partial S3 object immediately to prevent storage waste. Log the interaction ID and retry once. If it fails again, quarantine the interaction ID for manual review.
Code showing the fix:
if computedMD5 != *recording.Md5 {
deletePartialObject(ctx, job.S3Client, job.Bucket, key)
return fmt.Errorf("MD5 mismatch: expected %s, got %s", *recording.Md5, computedMD5)
}
Error: 429 Too Many Requests
What causes it: Polling /api/v2/recordings/recordings too frequently or exceeding tenant-level rate limits.
How to fix it: Implement exponential backoff on the SDK client. The Genesys SDK does not retry automatically, so you must wrap API calls in a retry function.
Code showing the fix:
func retryWithBackoff(fn func() error, maxRetries int) error {
var err error
for i := 0; i < maxRetries; i++ {
err = fn()
if err == nil {
return nil
}
if strings.Contains(err.Error(), "429") {
time.Sleep(time.Second * time.Duration(i+1))
continue
}
return err
}
return err
}
Error: 5xx Internal Server Error
What causes it: Genesys Cloud platform transient failures or S3 endpoint throttling.
How to fix it: Use context timeouts and retry with jitter. Never retry 4xx errors except 403 for presigned URL refresh.
Code showing the fix:
ctx, cancel := context.WithTimeout(ctx, 30*time.Second)
defer cancel()
// Pass ctx to all SDK and HTTP calls