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Commit aff3d00

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yualexanyualexan
committed
Add new Go handler example
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‎sample-apps/example-go/function/event.json

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{
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"order_id": "12345",
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"amount": 199.99,
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"item": "Wireless Headphones"
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}

‎sample-apps/example-go/function/go.mod

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module example-go
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go 1.22.6
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require (
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github.com/aws/aws-lambda-go v1.47.0
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github.com/aws/aws-sdk-go-v2/config v1.27.27
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github.com/aws/aws-sdk-go-v2/service/s3 v1.58.3
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)
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require (
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github.com/aws/aws-sdk-go-v2 v1.30.3 // indirect
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github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.6.3 // indirect
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github.com/aws/aws-sdk-go-v2/credentials v1.17.27 // indirect
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github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.16.11 // indirect
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github.com/aws/aws-sdk-go-v2/internal/configsources v1.3.15 // indirect
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github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.6.15 // indirect
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github.com/aws/aws-sdk-go-v2/internal/ini v1.8.0 // indirect
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github.com/aws/aws-sdk-go-v2/internal/v4a v1.3.15 // indirect
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github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.11.3 // indirect
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github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.3.17 // indirect
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github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.11.17 // indirect
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github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.17.15 // indirect
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github.com/aws/aws-sdk-go-v2/service/sso v1.22.4 // indirect
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github.com/aws/aws-sdk-go-v2/service/ssooidc v1.26.4 // indirect
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github.com/aws/aws-sdk-go-v2/service/sts v1.30.3 // indirect
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github.com/aws/smithy-go v1.20.3 // indirect
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)

‎sample-apps/example-go/function/go.sum

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+46Lines changed: 46 additions & 0 deletions
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github.com/aws/aws-lambda-go v1.47.0 h1:0H8s0vumYx/YKs4sE7YM0ktwL2eWse+kfopsRI1sXVI=
2+
github.com/aws/aws-lambda-go v1.47.0/go.mod h1:dpMpZgvWx5vuQJfBt0zqBha60q7Dd7RfgJv23DymV8A=
3+
github.com/aws/aws-sdk-go-v2 v1.30.3 h1:jUeBtG0Ih+ZIFH0F4UkmL9w3cSpaMv9tYYDbzILP8dY=
4+
github.com/aws/aws-sdk-go-v2 v1.30.3/go.mod h1:nIQjQVp5sfpQcTc9mPSr1B0PaWK5ByX9MOoDadSN4lc=
5+
github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.6.3 h1:tW1/Rkad38LA15X4UQtjXZXNKsCgkshC3EbmcUmghTg=
6+
github.com/aws/aws-sdk-go-v2/aws/protocol/eventstream v1.6.3/go.mod h1:UbnqO+zjqk3uIt9yCACHJ9IVNhyhOCnYk8yA19SAWrM=
7+
github.com/aws/aws-sdk-go-v2/config v1.27.27 h1:HdqgGt1OAP0HkEDDShEl0oSYa9ZZBSOmKpdpsDMdO90=
8+
github.com/aws/aws-sdk-go-v2/config v1.27.27/go.mod h1:MVYamCg76dFNINkZFu4n4RjDixhVr51HLj4ErWzrVwg=
9+
github.com/aws/aws-sdk-go-v2/credentials v1.17.27 h1:2raNba6gr2IfA0eqqiP2XiQ0UVOpGPgDSi0I9iAP+UI=
10+
github.com/aws/aws-sdk-go-v2/credentials v1.17.27/go.mod h1:gniiwbGahQByxan6YjQUMcW4Aov6bLC3m+evgcoN4r4=
11+
github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.16.11 h1:KreluoV8FZDEtI6Co2xuNk/UqI9iwMrOx/87PBNIKqw=
12+
github.com/aws/aws-sdk-go-v2/feature/ec2/imds v1.16.11/go.mod h1:SeSUYBLsMYFoRvHE0Tjvn7kbxaUhl75CJi1sbfhMxkU=
13+
github.com/aws/aws-sdk-go-v2/internal/configsources v1.3.15 h1:SoNJ4RlFEQEbtDcCEt+QG56MY4fm4W8rYirAmq+/DdU=
14+
github.com/aws/aws-sdk-go-v2/internal/configsources v1.3.15/go.mod h1:U9ke74k1n2bf+RIgoX1SXFed1HLs51OgUSs+Ph0KJP8=
15+
github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.6.15 h1:C6WHdGnTDIYETAm5iErQUiVNsclNx9qbJVPIt03B6bI=
16+
github.com/aws/aws-sdk-go-v2/internal/endpoints/v2 v2.6.15/go.mod h1:ZQLZqhcu+JhSrA9/NXRm8SkDvsycE+JkV3WGY41e+IM=
17+
github.com/aws/aws-sdk-go-v2/internal/ini v1.8.0 h1:hT8rVHwugYE2lEfdFE0QWVo81lF7jMrYJVDWI+f+VxU=
18+
github.com/aws/aws-sdk-go-v2/internal/ini v1.8.0/go.mod h1:8tu/lYfQfFe6IGnaOdrpVgEL2IrrDOf6/m9RQum4NkY=
19+
github.com/aws/aws-sdk-go-v2/internal/v4a v1.3.15 h1:Z5r7SycxmSllHYmaAZPpmN8GviDrSGhMS6bldqtXZPw=
20+
github.com/aws/aws-sdk-go-v2/internal/v4a v1.3.15/go.mod h1:CetW7bDE00QoGEmPUoZuRog07SGVAUVW6LFpNP0YfIg=
21+
github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.11.3 h1:dT3MqvGhSoaIhRseqw2I0yH81l7wiR2vjs57O51EAm8=
22+
github.com/aws/aws-sdk-go-v2/service/internal/accept-encoding v1.11.3/go.mod h1:GlAeCkHwugxdHaueRr4nhPuY+WW+gR8UjlcqzPr1SPI=
23+
github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.3.17 h1:YPYe6ZmvUfDDDELqEKtAd6bo8zxhkm+XEFEzQisqUIE=
24+
github.com/aws/aws-sdk-go-v2/service/internal/checksum v1.3.17/go.mod h1:oBtcnYua/CgzCWYN7NZ5j7PotFDaFSUjCYVTtfyn7vw=
25+
github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.11.17 h1:HGErhhrxZlQ044RiM+WdoZxp0p+EGM62y3L6pwA4olE=
26+
github.com/aws/aws-sdk-go-v2/service/internal/presigned-url v1.11.17/go.mod h1:RkZEx4l0EHYDJpWppMJ3nD9wZJAa8/0lq9aVC+r2UII=
27+
github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.17.15 h1:246A4lSTXWJw/rmlQI+TT2OcqeDMKBdyjEQrafMaQdA=
28+
github.com/aws/aws-sdk-go-v2/service/internal/s3shared v1.17.15/go.mod h1:haVfg3761/WF7YPuJOER2MP0k4UAXyHaLclKXB6usDg=
29+
github.com/aws/aws-sdk-go-v2/service/s3 v1.58.3 h1:hT8ZAZRIfqBqHbzKTII+CIiY8G2oC9OpLedkZ51DWl8=
30+
github.com/aws/aws-sdk-go-v2/service/s3 v1.58.3/go.mod h1:Lcxzg5rojyVPU/0eFwLtcyTaek/6Mtic5B1gJo7e/zE=
31+
github.com/aws/aws-sdk-go-v2/service/sso v1.22.4 h1:BXx0ZIxvrJdSgSvKTZ+yRBeSqqgPM89VPlulEcl37tM=
32+
github.com/aws/aws-sdk-go-v2/service/sso v1.22.4/go.mod h1:ooyCOXjvJEsUw7x+ZDHeISPMhtwI3ZCB7ggFMcFfWLU=
33+
github.com/aws/aws-sdk-go-v2/service/ssooidc v1.26.4 h1:yiwVzJW2ZxZTurVbYWA7QOrAaCYQR72t0wrSBfoesUE=
34+
github.com/aws/aws-sdk-go-v2/service/ssooidc v1.26.4/go.mod h1:0oxfLkpz3rQ/CHlx5hB7H69YUpFiI1tql6Q6Ne+1bCw=
35+
github.com/aws/aws-sdk-go-v2/service/sts v1.30.3 h1:ZsDKRLXGWHk8WdtyYMoGNO7bTudrvuKpDKgMVRlepGE=
36+
github.com/aws/aws-sdk-go-v2/service/sts v1.30.3/go.mod h1:zwySh8fpFyXp9yOr/KVzxOl8SRqgf/IDw5aUt9UKFcQ=
37+
github.com/aws/smithy-go v1.20.3 h1:ryHwveWzPV5BIof6fyDvor6V3iUL7nTfiTKXHiW05nE=
38+
github.com/aws/smithy-go v1.20.3/go.mod h1:krry+ya/rV9RDcV/Q16kpu6ypI4K2czasz0NC3qS14E=
39+
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
40+
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
41+
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
42+
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
43+
github.com/stretchr/testify v1.7.2 h1:4jaiDzPyXQvSd7D0EjG45355tLlV3VOECpq10pLC+8s=
44+
github.com/stretchr/testify v1.7.2/go.mod h1:R6va5+xMeoiuVRoj+gSkQ7d3FALtqAAGI1FQKckRals=
45+
gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
46+
gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

‎sample-apps/example-go/function/main.go

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package main
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import (
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"context"
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"encoding/json"
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"fmt"
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"log"
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"os"
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"strings"
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"github.com/aws/aws-lambda-go/lambda"
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"github.com/aws/aws-sdk-go-v2/config"
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"github.com/aws/aws-sdk-go-v2/service/s3"
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)
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type Order struct {
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OrderID string `json:"order_id"`
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Amount float64 `json:"amount"`
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Item string `json:"item"`
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}
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var (
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s3Client *s3.Client
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)
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func init() {
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// Initialize the S3 client outside of the handler, during the init phase
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cfg, err := config.LoadDefaultConfig(context.TODO())
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if err != nil {
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log.Fatalf("unable to load SDK config, %v", err)
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}
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s3Client = s3.NewFromConfig(cfg)
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}
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func handleRequest(ctx context.Context, event json.RawMessage) error {
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// Parse the input event
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var order Order
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if err := json.Unmarshal(event, &order); err != nil {
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log.Printf("Failed to unmarshal event: %v", err)
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return err
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}
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// Access environment variables
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bucketName := os.Getenv("RECEIPT_BUCKET")
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if bucketName == "" {
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log.Printf("RECEIPT_BUCKET environment variable is not set")
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return fmt.Errorf("missing required environment variable RECEIPT_BUCKET")
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}
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// Create the receipt content and key destination
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receiptContent := fmt.Sprintf("OrderID: %s\nAmount: $%.2f\nItem: %s",
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order.OrderID, order.Amount, order.Item)
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key := "receipts/" + order.OrderID + ".txt"
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// Upload the receipt to S3
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_, err := s3Client.PutObject(ctx, &s3.PutObjectInput{
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Bucket: &bucketName,
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Key: &key,
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Body: strings.NewReader(receiptContent),
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})
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if err != nil {
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log.Printf("Failed to upload receipt to S3: %v", err)
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return err
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}
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log.Printf("Successfully processed order %s and stored receipt in S3 bucket %s", order.OrderID, bucketName)
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return nil
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}
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func main() {
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lambda.Start(handleRequest)
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}

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