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Added image resizer for responsive web apps

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This commit is contained in:
Lee Brown
2019-05-20 22:16:58 -05:00
parent 5879fc664f f4d44b57d4
commit 790c7b3255
23 changed files with 1458 additions and 327 deletions
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90
example-project/cmd/web-api/main.go
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@ -2,10 +2,8 @@ package main
import (
"context"
"crypto/rsa"
"encoding/json"
"expvar"
"io/ioutil"
"log"
"net/http"
_ "net/http/pprof"
@ -19,9 +17,12 @@ import (
"geeks-accelerator/oss/saas-starter-kit/example-project/internal/platform/db"
"geeks-accelerator/oss/saas-starter-kit/example-project/internal/platform/flag"
itrace "geeks-accelerator/oss/saas-starter-kit/example-project/internal/platform/trace"
jwt "github.com/dgrijalva/jwt-go"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/credentials"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/kelseyhightower/envconfig"
"go.opencensus.io/trace"
awstrace "gopkg.in/DataDog/dd-trace-go.v1/contrib/aws/aws-sdk-go/aws"
)
/*
@ -49,33 +50,59 @@ func main() {
// =========================================================================
// Configuration
var cfg struct {
Env string `default:"dev" envconfig:"ENV"`
HTTP struct {
Host string `default:"0.0.0.0:3001" envconfig:"HTTP_HOST"`
DebugHost string `default:"0.0.0.0:4000" envconfig:"DEBUG_HOST"`
ReadTimeout time.Duration `default:"5s" envconfig:"READ_TIMEOUT"`
WriteTimeout time.Duration `default:"5s" envconfig:"WRITE_TIMEOUT"`
ShutdownTimeout time.Duration `default:"5s" envconfig:"SHUTDOWN_TIMEOUT"`
DebugHost string `default:"0.0.0.0:4000" envconfig:"HTTP_DEBUG_HOST"`
ReadTimeout time.Duration `default:"5s" envconfig:"HTTP_READ_TIMEOUT"`
WriteTimeout time.Duration `default:"5s" envconfig:"HTTP_WRITE_TIMEOUT"`
ShutdownTimeout time.Duration `default:"5s" envconfig:"HTTP_SHUTDOWN_TIMEOUT"`
}
App struct {
Name string `default:"web-app" envconfig:"APP_NAME"`
}
BuildInfo struct {
CiCommitRefName string `envconfig:"CI_COMMIT_REF_NAME"`
CiCommitRefSlug string `envconfig:"CI_COMMIT_REF_SLUG"`
CiCommitSha string `envconfig:"CI_COMMIT_SHA"`
CiCommitTag string `envconfig:"CI_COMMIT_TAG"`
CiCommitTitle string `envconfig:"CI_COMMIT_TITLE"`
CiCommitDescription string `envconfig:"CI_COMMIT_DESCRIPTION"`
CiJobId string `envconfig:"CI_COMMIT_JOB_ID"`
CiJobUrl string `envconfig:"CI_COMMIT_JOB_URL"`
CiPipelineId string `envconfig:"CI_COMMIT_PIPELINE_ID"`
CiPipelineUrl string `envconfig:"CI_COMMIT_PIPELINE_URL"`
}
DB struct {
DialTimeout time.Duration `default:"5s" envconfig:"DIAL_TIMEOUT"`
Host string `default:"mongo:27017/gotraining" envconfig:"HOST"`
DialTimeout time.Duration `default:"5s" envconfig:"DB_DIAL_TIMEOUT"`
Host string `default:"mongo:27017/gotraining" envconfig:"DB_HOST"`
}
Trace struct {
Host string `default:"http://tracer:3002/v1/publish" envconfig:"HOST"`
BatchSize int `default:"1000" envconfig:"BATCH_SIZE"`
SendInterval time.Duration `default:"15s" envconfig:"SEND_INTERVAL"`
SendTimeout time.Duration `default:"500ms" envconfig:"SEND_TIMEOUT"`
Host string `default:"http://tracer:3002/v1/publish" envconfig:"TRACE_HOST"`
BatchSize int `default:"1000" envconfig:"TRACE_BATCH_SIZE"`
SendInterval time.Duration `default:"15s" envconfig:"TRACE_SEND_INTERVAL"`
SendTimeout time.Duration `default:"500ms" envconfig:"TRACE_SEND_TIMEOUT"`
}
AwsAccount struct {
AccessKeyID string `envconfig:"AWS_ACCESS_KEY_ID"`
SecretAccessKey string `envconfig:"AWS_SECRET_ACCESS_KEY"`
Region string `default:"us-east-1" envconfig:"AWS_REGION"`
// Get an AWS session from an implicit source if no explicit
// configuration is provided. This is useful for taking advantage of
// EC2/ECS instance roles.
UseRole bool `envconfig:"AWS_USE_ROLE"`
}
Auth struct {
KeyID string `envconfig:"KEY_ID"`
PrivateKeyFile string `default:"/app/private.pem" envconfig:"PRIVATE_KEY_FILE"`
Algorithm string `default:"RS256" envconfig:"ALGORITHM"`
AwsSecretID string `default:"auth-secret-key" envconfig:"AUTH_AWS_SECRET_ID"`
KeyExpiration time.Duration `default:"3600s" envconfig:"AUTH_KEY_EXPIRATION"`
}
}
if err := envconfig.Process("WEB_APP", &cfg); err != nil {
// !!! This prefix seems buried, if you copy and paste this main.go
// file, its likely you will forget to update this.
if err := envconfig.Process("WEB_API", &cfg); err != nil {
log.Fatalf("main : Parsing Config : %v", err)
}
@ -104,21 +131,22 @@ func main() {
log.Printf("main : Config : %v\n", string(cfgJSON))
// =========================================================================
// Find auth keys
keyContents, err := ioutil.ReadFile(cfg.Auth.PrivateKeyFile)
if err != nil {
log.Fatalf("main : Reading auth private key : %v", err)
// Init AWS Session
var awsSession *session.Session
if cfg.AwsAccount.UseRole {
// Get an AWS session from an implicit source if no explicit
// configuration is provided. This is useful for taking advantage of
// EC2/ECS instance roles.
awsSession = session.Must(session.NewSession())
} else {
creds := credentials.NewStaticCredentials(cfg.AwsAccount.AccessKeyID, cfg.AwsAccount.SecretAccessKey, "")
awsSession = session.New(&aws.Config{Region: aws.String(cfg.AwsAccount.Region), Credentials: creds})
}
awsSession = awstrace.WrapSession(awsSession)
key, err := jwt.ParseRSAPrivateKeyFromPEM(keyContents)
if err != nil {
log.Fatalf("main : Parsing auth private key : %v", err)
}
publicKeyLookup := auth.NewSingleKeyFunc(cfg.Auth.KeyID, key.Public().(*rsa.PublicKey))
authenticator, err := auth.NewAuthenticator(key, cfg.Auth.KeyID, cfg.Auth.Algorithm, publicKeyLookup)
// =========================================================================
// Load auth keys from AWS and init new Authenticator
authenticator, err := auth.NewAuthenticator(awsSession, cfg.Auth.AwsSecretID, time.Now().UTC(), cfg.Auth.KeyExpiration)
if err != nil {
log.Fatalf("main : Constructing authenticator : %v", err)
}