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s3.go
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s3.go
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package s3
import (
"context"
"errors"
"fmt"
"io"
"net/http"
"github.com/alexfalkowski/go-service/file"
"github.com/alexfalkowski/go-service/meta"
"github.com/alexfalkowski/go-service/telemetry/tracer"
tm "github.com/alexfalkowski/go-service/transport/meta"
"github.com/alexfalkowski/konfig/aws"
source "github.com/alexfalkowski/konfig/source/configurator"
ke "github.com/alexfalkowski/konfig/source/configurator/errors"
"github.com/aws/aws-sdk-go-v2/config"
"github.com/aws/aws-sdk-go-v2/service/s3"
"github.com/aws/aws-sdk-go-v2/service/s3/types"
"go.opentelemetry.io/otel/trace"
)
// NewConfigurator for s3.
func NewConfigurator(cfg *Config, t trace.Tracer, client *http.Client) *Configurator {
return &Configurator{cfg: cfg, tracer: t, client: client}
}
// Configurator for s3.
type Configurator struct {
cfg *Config
tracer trace.Tracer
client *http.Client
}
// GetConfig for s3.
func (c *Configurator) GetConfig(ctx context.Context, params source.ConfigParams) (*source.Config, error) {
path := c.path(params.Application, params.Version, params.Environment, params.Continent, params.Country, params.Command, params.Kind)
ctx, span := c.span(ctx)
defer span.End()
opts := []func(*config.LoadOptions) error{
config.WithEndpointResolverWithOptions(aws.EndpointResolver()),
config.WithHTTPClient(c.client),
}
cfg, err := config.LoadDefaultConfig(ctx, opts...)
if err != nil {
tracer.Meta(ctx, span)
tracer.Error(err, span)
return nil, err
}
client := s3.NewFromConfig(cfg, func(o *s3.Options) {
o.UsePathStyle = true
})
out, err := client.GetObject(ctx, &s3.GetObjectInput{Bucket: &c.cfg.Bucket, Key: &path})
if err != nil {
tracer.Meta(ctx, span)
var nerr *types.NoSuchKey
if errors.As(err, &nerr) {
tracer.Error(err, span)
return nil, ke.ErrNotFound
}
tracer.Error(err, span)
return nil, err
}
data, err := io.ReadAll(out.Body)
if err != nil {
tracer.Meta(ctx, span)
tracer.Error(err, span)
return nil, err
}
tracer.Meta(ctx, span)
return &source.Config{Kind: file.Extension(path), Data: data}, nil
}
func (c *Configurator) path(app, ver, env, continent, country, cmd, kind string) string {
if continent == "*" && country == "*" {
return fmt.Sprintf("%s/%s/%s/%s.%s", app, ver, env, cmd, kind)
}
if continent != "*" && country == "*" {
return fmt.Sprintf("%s/%s/%s/%s/%s.%s", app, ver, env, continent, cmd, kind)
}
return fmt.Sprintf("%s/%s/%s/%s/%s/%s.%s", app, ver, env, continent, country, cmd, kind)
}
func (c *Configurator) span(ctx context.Context) (context.Context, trace.Span) {
ctx, span := c.tracer.Start(ctx, operationName("get config"), trace.WithSpanKind(trace.SpanKindClient))
ctx = tm.WithTraceID(ctx, meta.ToValuer(span.SpanContext().TraceID()))
return ctx, span
}
func operationName(name string) string {
return tracer.OperationName("s3", name)
}