vendor.github.com.aws.aws-sdk-go-v2.config.resolve.go Maven / Gradle / Ivy
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package config
import (
"context"
"crypto/tls"
"crypto/x509"
"fmt"
"io/ioutil"
"net/http"
"os"
"github.com/aws/aws-sdk-go-v2/aws"
awshttp "github.com/aws/aws-sdk-go-v2/aws/transport/http"
"github.com/aws/aws-sdk-go-v2/feature/ec2/imds"
"github.com/aws/smithy-go/logging"
)
// resolveDefaultAWSConfig will write default configuration values into the cfg
// value. It will write the default values, overwriting any previous value.
//
// This should be used as the first resolver in the slice of resolvers when
// resolving external configuration.
func resolveDefaultAWSConfig(ctx context.Context, cfg *aws.Config, cfgs configs) error {
var sources []interface{}
for _, s := range cfgs {
sources = append(sources, s)
}
*cfg = aws.Config{
Logger: logging.NewStandardLogger(os.Stderr),
ConfigSources: sources,
}
return nil
}
// resolveCustomCABundle extracts the first instance of a custom CA bundle filename
// from the external configurations. It will update the HTTP Client's builder
// to be configured with the custom CA bundle.
//
// Config provider used:
// * customCABundleProvider
func resolveCustomCABundle(ctx context.Context, cfg *aws.Config, cfgs configs) error {
pemCerts, found, err := getCustomCABundle(ctx, cfgs)
if err != nil {
// TODO error handling, What is the best way to handle this?
// capture previous errors continue. error out if all errors
return err
}
if !found {
return nil
}
if cfg.HTTPClient == nil {
cfg.HTTPClient = awshttp.NewBuildableClient()
}
trOpts, ok := cfg.HTTPClient.(*awshttp.BuildableClient)
if !ok {
return fmt.Errorf("unable to add custom RootCAs HTTPClient, "+
"has no WithTransportOptions, %T", cfg.HTTPClient)
}
var appendErr error
client := trOpts.WithTransportOptions(func(tr *http.Transport) {
if tr.TLSClientConfig == nil {
tr.TLSClientConfig = &tls.Config{}
}
if tr.TLSClientConfig.RootCAs == nil {
tr.TLSClientConfig.RootCAs = x509.NewCertPool()
}
b, err := ioutil.ReadAll(pemCerts)
if err != nil {
appendErr = fmt.Errorf("failed to read custom CA bundle PEM file")
}
if !tr.TLSClientConfig.RootCAs.AppendCertsFromPEM(b) {
appendErr = fmt.Errorf("failed to load custom CA bundle PEM file")
}
})
if appendErr != nil {
return appendErr
}
cfg.HTTPClient = client
return err
}
// resolveRegion extracts the first instance of a Region from the configs slice.
//
// Config providers used:
// * regionProvider
func resolveRegion(ctx context.Context, cfg *aws.Config, configs configs) error {
v, found, err := getRegion(ctx, configs)
if err != nil {
// TODO error handling, What is the best way to handle this?
// capture previous errors continue. error out if all errors
return err
}
if !found {
return nil
}
cfg.Region = v
return nil
}
func resolveBaseEndpoint(ctx context.Context, cfg *aws.Config, configs configs) error {
var downcastCfgSources []interface{}
for _, cs := range configs {
downcastCfgSources = append(downcastCfgSources, interface{}(cs))
}
if val, found, err := GetIgnoreConfiguredEndpoints(ctx, downcastCfgSources); found && val && err == nil {
cfg.BaseEndpoint = nil
return nil
}
v, found, err := getBaseEndpoint(ctx, configs)
if err != nil {
return err
}
if !found {
return nil
}
cfg.BaseEndpoint = aws.String(v)
return nil
}
// resolveAppID extracts the sdk app ID from the configs slice's SharedConfig or env var
func resolveAppID(ctx context.Context, cfg *aws.Config, configs configs) error {
ID, _, err := getAppID(ctx, configs)
if err != nil {
return err
}
cfg.AppID = ID
return nil
}
// resolveDisableRequestCompression extracts the DisableRequestCompression from the configs slice's
// SharedConfig or EnvConfig
func resolveDisableRequestCompression(ctx context.Context, cfg *aws.Config, configs configs) error {
disable, _, err := getDisableRequestCompression(ctx, configs)
if err != nil {
return err
}
cfg.DisableRequestCompression = disable
return nil
}
// resolveRequestMinCompressSizeBytes extracts the RequestMinCompressSizeBytes from the configs slice's
// SharedConfig or EnvConfig
func resolveRequestMinCompressSizeBytes(ctx context.Context, cfg *aws.Config, configs configs) error {
minBytes, found, err := getRequestMinCompressSizeBytes(ctx, configs)
if err != nil {
return err
}
// must set a default min size 10240 if not configured
if !found {
minBytes = 10240
}
cfg.RequestMinCompressSizeBytes = minBytes
return nil
}
// resolveDefaultRegion extracts the first instance of a default region and sets `aws.Config.Region` to the default
// region if region had not been resolved from other sources.
func resolveDefaultRegion(ctx context.Context, cfg *aws.Config, configs configs) error {
if len(cfg.Region) > 0 {
return nil
}
v, found, err := getDefaultRegion(ctx, configs)
if err != nil {
return err
}
if !found {
return nil
}
cfg.Region = v
return nil
}
// resolveHTTPClient extracts the first instance of a HTTPClient and sets `aws.Config.HTTPClient` to the HTTPClient instance
// if one has not been resolved from other sources.
func resolveHTTPClient(ctx context.Context, cfg *aws.Config, configs configs) error {
c, found, err := getHTTPClient(ctx, configs)
if err != nil {
return err
}
if !found {
return nil
}
cfg.HTTPClient = c
return nil
}
// resolveAPIOptions extracts the first instance of APIOptions and sets `aws.Config.APIOptions` to the resolved API options
// if one has not been resolved from other sources.
func resolveAPIOptions(ctx context.Context, cfg *aws.Config, configs configs) error {
o, found, err := getAPIOptions(ctx, configs)
if err != nil {
return err
}
if !found {
return nil
}
cfg.APIOptions = o
return nil
}
// resolveEndpointResolver extracts the first instance of a EndpointResolverFunc from the config slice
// and sets the functions result on the aws.Config.EndpointResolver
func resolveEndpointResolver(ctx context.Context, cfg *aws.Config, configs configs) error {
endpointResolver, found, err := getEndpointResolver(ctx, configs)
if err != nil {
return err
}
if !found {
return nil
}
cfg.EndpointResolver = endpointResolver
return nil
}
// resolveEndpointResolver extracts the first instance of a EndpointResolverFunc from the config slice
// and sets the functions result on the aws.Config.EndpointResolver
func resolveEndpointResolverWithOptions(ctx context.Context, cfg *aws.Config, configs configs) error {
endpointResolver, found, err := getEndpointResolverWithOptions(ctx, configs)
if err != nil {
return err
}
if !found {
return nil
}
cfg.EndpointResolverWithOptions = endpointResolver
return nil
}
func resolveLogger(ctx context.Context, cfg *aws.Config, configs configs) error {
logger, found, err := getLogger(ctx, configs)
if err != nil {
return err
}
if !found {
return nil
}
cfg.Logger = logger
return nil
}
func resolveClientLogMode(ctx context.Context, cfg *aws.Config, configs configs) error {
mode, found, err := getClientLogMode(ctx, configs)
if err != nil {
return err
}
if !found {
return nil
}
cfg.ClientLogMode = mode
return nil
}
func resolveRetryer(ctx context.Context, cfg *aws.Config, configs configs) error {
retryer, found, err := getRetryer(ctx, configs)
if err != nil {
return err
}
if found {
cfg.Retryer = retryer
return nil
}
// Only load the retry options if a custom retryer has not be specified.
if err = resolveRetryMaxAttempts(ctx, cfg, configs); err != nil {
return err
}
return resolveRetryMode(ctx, cfg, configs)
}
func resolveEC2IMDSRegion(ctx context.Context, cfg *aws.Config, configs configs) error {
if len(cfg.Region) > 0 {
return nil
}
region, found, err := getEC2IMDSRegion(ctx, configs)
if err != nil {
return err
}
if !found {
return nil
}
cfg.Region = region
return nil
}
func resolveDefaultsModeOptions(ctx context.Context, cfg *aws.Config, configs configs) error {
defaultsMode, found, err := getDefaultsMode(ctx, configs)
if err != nil {
return err
}
if !found {
defaultsMode = aws.DefaultsModeLegacy
}
var environment aws.RuntimeEnvironment
if defaultsMode == aws.DefaultsModeAuto {
envConfig, _, _ := getAWSConfigSources(configs)
client, found, err := getDefaultsModeIMDSClient(ctx, configs)
if err != nil {
return err
}
if !found {
client = imds.NewFromConfig(*cfg)
}
environment, err = resolveDefaultsModeRuntimeEnvironment(ctx, envConfig, client)
if err != nil {
return err
}
}
cfg.DefaultsMode = defaultsMode
cfg.RuntimeEnvironment = environment
return nil
}
func resolveRetryMaxAttempts(ctx context.Context, cfg *aws.Config, configs configs) error {
maxAttempts, found, err := getRetryMaxAttempts(ctx, configs)
if err != nil || !found {
return err
}
cfg.RetryMaxAttempts = maxAttempts
return nil
}
func resolveRetryMode(ctx context.Context, cfg *aws.Config, configs configs) error {
retryMode, found, err := getRetryMode(ctx, configs)
if err != nil || !found {
return err
}
cfg.RetryMode = retryMode
return nil
}