/
main.go
137 lines (116 loc) · 3.2 KB
/
main.go
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package main
import (
"errors"
"fmt"
"github.com/aws/aws-lambda-go/events"
"github.com/aws/aws-lambda-go/lambda"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/aws/session"
"github.com/aws/aws-sdk-go/service/dynamodb"
"github.com/aws/aws-sdk-go/service/dynamodb/dynamodbattribute"
"github.com/aws/aws-sdk-go/service/dynamodb/expression"
"github.com/google/uuid"
"log"
"os"
"pyrch-go/internal/apigwp"
"pyrch-go/internal/faas"
"strconv"
"time"
)
var db *dynamodb.DynamoDB
var i interface{}
func init() {
if sess, err := session.NewSession(&aws.Config{
Region: aws.String(os.Getenv("AWS_REGION")),
}); err != nil {
log.Fatalf("Failed to connect to AWS: %s", err.Error())
} else {
db = dynamodb.New(sess)
}
}
func save(table *string, i *interface{}) error {
item, err := dynamodbattribute.MarshalMap(&i)
if err != nil {
return err
}
fmt.Println(item)
nowStr := strconv.FormatInt(time.Now().Unix(), 10)
nowVal := &dynamodb.AttributeValue{N: &nowStr}
item["unix"] = nowVal
utcStr := time.Now().UTC().Format(time.RFC3339)
utcVal := &dynamodb.AttributeValue{S: &utcStr}
item["utc"] = utcVal
if id, ok := item["id"]; !ok || id.S == nil {
s, _ := uuid.NewUUID()
item["id"] = &dynamodb.AttributeValue{S: aws.String(s.String())}
}
if _, err := db.PutItem(&dynamodb.PutItemInput{
Item: item,
TableName: table,
}); err != nil {
return err
} else {
return dynamodbattribute.UnmarshalMap(item, &i)
}
}
func findOne(table, id *string, i interface{}) error {
if out, err := db.GetItem(&dynamodb.GetItemInput{
TableName: table,
Key: map[string]*dynamodb.AttributeValue{"id": {S: id}},
}); err != nil {
return err
} else {
return dynamodbattribute.UnmarshalMap(out.Item, &i)
}
}
func findAll(table *string, i interface{}) error {
f := expression.AttributeNotExists(expression.Name("deleted"))
exp, expErr := expression.NewBuilder().WithFilter(f).Build()
if expErr != nil {
return expErr
}
if out, err := db.Scan(&dynamodb.ScanInput{
ExpressionAttributeNames: exp.Names(),
ExpressionAttributeValues: exp.Values(),
FilterExpression: exp.Filter(),
ProjectionExpression: exp.Projection(),
TableName: table,
}); err != nil {
return err
} else {
return dynamodbattribute.UnmarshalListOfMaps(out.Items, &i)
}
}
func Handle(r events.APIGatewayProxyRequest) (events.APIGatewayProxyResponse, error) {
apigwp.LogRequest(r)
token := r.Headers["Authorization"]
if res := faas.CallIt("token", "verify", r.Headers); res.StatusCode != 200 {
return apigwp.NotOk(res.StatusCode, errors.New(res.Body))
} else {
token = res.Headers["Authorization"]
}
table := r.PathParameters["table"]
if r.Path == "save" {
if err := save(&table, &i); err != nil {
return apigwp.Bad(err)
}
return apigwp.OkInterface(token, i)
}
if r.Path == "find-one" {
id := r.PathParameters["id"]
if err := findOne(&table, &id, &i); err != nil {
return apigwp.Bad(err)
}
return apigwp.OkInterface(token, i)
}
if r.Path == "find-all" {
if err := findAll(&table, &i); err != nil {
return apigwp.Bad(err)
}
return apigwp.OkInterface(token, i)
}
return apigwp.Bad(fmt.Errorf("no path [%s]\n", r.Path))
}
func main() {
lambda.Start(Handle)
}