Gov2: Add presign post request support - S3

gov2/s3/actions/presigner.go

@@ -83,4 +83,22 @@ func (presigner Presigner) DeleteObject(bucketName string, objectKey string) (*v
 }
 
 // snippet-end:[gov2.s3.PresignDeleteObject]
+
+// snippet-start:[gov2.s3.PresignPostObject]
+
+func (presigner Presigner) PresignPostObject(bucketName string, objectKey string, lifetimeSecs int64) (*s3.PresignedPostRequest, error) {
+	request, err := presigner.PresignClient.PresignPostObject(context.TODO(), &s3.PutObjectInput{
+		Bucket: aws.String(bucketName),
+		Key:    aws.String(objectKey),
+	}, func(options *s3.PresignPostOptions) {
+		options.Expires = time.Duration(lifetimeSecs) * time.Second
+	})
+	if err != nil {
+		log.Printf("Couldn't get a presigned post request to put %v:%v. Here's why: %v\n", bucketName, objectKey, err)
+	}
+	return request, nil
+}
+
+// snippet-end:[gov2.s3.PresignPostObject]
+
 // snippet-end:[gov2.s3.Presigner.complete]

gov2/s3/cmd/main.go

@@ -20,12 +20,12 @@ import (
 //
 // `-scenario` can be one of the following:
 //
-// * `getstarted`    -  Runs the interactive get started scenario that shows you how to use
-//						Amazon Simple Storage Service (Amazon S3) actions to work with
-//						S3 buckets and objects.
-// * `presigning` - 	Runs the interactive presigning scenario that shows you how to
-//						get presigned requests that contain temporary credentials
-//						and can be used to make requests from any HTTP client.
+//   - `getstarted`    -  Runs the interactive get started scenario that shows you how to use
+//     Amazon Simple Storage Service (Amazon S3) actions to work with
+//     S3 buckets and objects.
+//   - `presigning` - 	Runs the interactive presigning scenario that shows you how to
+//     get presigned requests that contain temporary credentials
+//     and can be used to make requests from any HTTP client.
 func main() {
 	scenarioMap := map[string]func(sdkConfig aws.Config){
 		"getstarted": runGetStartedScenario,

gov2/s3/go.sum

@@ -40,21 +40,7 @@ github.com/awsdocs/aws-doc-sdk-examples/gov2/demotools v0.0.0-20240907001412-a93
 github.com/awsdocs/aws-doc-sdk-examples/gov2/demotools v0.0.0-20240907001412-a9375541143b/go.mod h1:iBzksyiv5HVU+cymGDQbbvcecca+rsARJlDFL8np8oE=
 github.com/awsdocs/aws-doc-sdk-examples/gov2/testtools v0.0.0-20240907001412-a9375541143b h1:UmPy4pArM7SIhTX2Xn5bhOkgI9onSUQ1Y9fxgDJ3pHU=
 github.com/awsdocs/aws-doc-sdk-examples/gov2/testtools v0.0.0-20240907001412-a9375541143b/go.mod h1:9Oj/8PZn3D5Ftp/Z1QWrIEFE0daERMqfJawL9duHRfc=
-github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/jmespath/go-jmespath v0.4.0 h1:BEgLn5cpjn8UN1mAw4NjwDrS35OdebyEtFe+9YPoQUg=
-github.com/jmespath/go-jmespath v0.4.0/go.mod h1:T8mJZnbsbmF+m6zOOFylbeCJqk5+pHWvzYPziyZiYoo=
-github.com/jmespath/go-jmespath/internal/testify v1.5.1 h1:shLQSRRSCCPj3f2gpwzGwWFoC7ycTf1rcQZHOlsJ6N8=
-github.com/jmespath/go-jmespath/internal/testify v1.5.1/go.mod h1:L3OGu8Wl2/fWfCI6z80xFu9LTZmf1ZRjMHUOPmWr69U=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/objx v0.1.0 h1:4G4v2dO3VZwixGIRoQ5Lfboy6nUhCyYzaqnIAPPhYs4=
-github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 golang.org/x/sys v0.25.0 h1:r+8e+loiHxRqhXVl6ML1nO3l1+oFoWbnlu2Ehimmi34=
 golang.org/x/sys v0.25.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/term v0.24.0 h1:Mh5cbb+Zk2hqqXNO7S1iTjEphVL+jb8ZWaqh/g+JWkM=
 golang.org/x/term v0.24.0/go.mod h1:lOBK/LVxemqiMij05LGJ0tzNr8xlmwBRJ81PX6wVLH8=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
-gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
-gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

gov2/s3/scenarios/scenario_presigning.go

@@ -4,9 +4,11 @@
 package scenarios
 
 import (
+	"bytes"
 	"fmt"
 	"io"
 	"log"
+	"mime/multipart"
 	"net/http"
 	"os"
 	"strings"
@@ -23,6 +25,7 @@ import (
 // unit testing.
 type IHttpRequester interface {
 	Get(url string) (resp *http.Response, err error)
+	Post(url, contentType string, body io.Reader) (resp *http.Response, err error)
 	Put(url string, contentLength int64, body io.Reader) (resp *http.Response, err error)
 	Delete(url string) (resp *http.Response, err error)
 }
@@ -33,6 +36,15 @@ type HttpRequester struct{}
 func (httpReq HttpRequester) Get(url string) (resp *http.Response, err error) {
 	return http.Get(url)
 }
+func (httpReq HttpRequester) Post(url, contentType string, body io.Reader) (resp *http.Response, err error) {
+	postRequest, err := http.NewRequest("POST", url, body)
+	if err != nil {
+		return nil, err
+	}
+	postRequest.Header.Set("Content-Type", contentType)
+	return http.DefaultClient.Do(postRequest)
+}
+
 func (httpReq HttpRequester) Put(url string, contentLength int64, body io.Reader) (resp *http.Response, err error) {
 	putRequest, err := http.NewRequest("PUT", url, body)
 	if err != nil {
@@ -51,6 +63,43 @@ func (httpReq HttpRequester) Delete(url string) (resp *http.Response, err error)
 
 // snippet-end:[gov2.s3.IHttpRequester.helper]
 
+// snippet-start:[gov2.s3.MultipartUpload.helper]
+func sendMultipartRequest(url string, fields map[string]string, file *os.File, filePath string, httpRequester IHttpRequester) (*http.Response, error) {
+	// Create a buffer to hold the multipart data
+	var requestBody bytes.Buffer
+	writer := multipart.NewWriter(&requestBody)
+
+	// Add form fields
+	for key, val := range fields {
+		err := writer.WriteField(key, val)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	// Always has to be named like this, and always has to be the last one
+	fileField := "file"
+	part, err := writer.CreateFormFile(fileField, filePath)
+	if err != nil {
+		return nil, err
+	}
+	_, err = io.Copy(part, file)
+	if err != nil {
+		return nil, err
+	}
+
+	// Close the writer to finalize the multipart message
+	err = writer.Close()
+	if err != nil {
+		return nil, err
+	}
+
+	// make the request
+	return httpRequester.Post(url, writer.FormDataContentType(), &requestBody)
+}
+
+// snippet-end:[gov2.s3.MultipartUpload.helper]
+
 // snippet-start:[gov2.s3.Scenario_Presigning]
 
 // RunPresigningScenario is an interactive example that shows you how to get presigned
@@ -76,7 +125,7 @@ func (httpReq HttpRequester) Delete(url string) (resp *http.Response, err error)
 func RunPresigningScenario(sdkConfig aws.Config, questioner demotools.IQuestioner, httpRequester IHttpRequester) {
 	defer func() {
 		if r := recover(); r != nil {
-			fmt.Printf("Something went wrong with the demo.")
+			fmt.Printf("Something went wrong with the demo")
 		}
 	}()
 
@@ -159,6 +208,24 @@ func RunPresigningScenario(sdkConfig aws.Config, questioner demotools.IQuestione
 	log.Println(string(downloadBody[:100]))
 	log.Println(strings.Repeat("-", 88))
 
+	log.Println("Now we'll create a new request to put the same object using a presigned post request")
+	presignPostRequest, err := presigner.PresignPostObject(bucketName, uploadKey, 60)
+	if err != nil {
+		panic(err)
+	}
+	log.Printf("Got a presigned post request to url %v with values %v\n", presignPostRequest.URL, presignPostRequest.Values)
+	log.Println("Using net/http multipart to send the request...")
+	uploadFile, err = os.Open(uploadFilename)
+	if err != nil {
+		panic(err)
+	}
+	defer uploadFile.Close()
+	multiPartResponse, err := sendMultipartRequest(presignPostRequest.URL, presignPostRequest.Values, uploadFile, uploadKey, httpRequester)
+	if err != nil {
+		panic(err)
+	}
+	log.Printf("Presign post object %v with presigned URL returned %v.", uploadKey, multiPartResponse.StatusCode)
+
 	log.Println("Let's presign a request to delete the object.")
 	questioner.Ask("Press Enter when you're ready.")
 	presignedDelRequest, err := presigner.DeleteObject(bucketName, uploadKey)

gov2/s3/scenarios/scenario_presigning_test.go

@@ -27,6 +27,9 @@ type MockHttpRequester struct {
 func (httpReq MockHttpRequester) Get(url string) (resp *http.Response, err error) {
 	return &http.Response{Status: "Testing", StatusCode: 200, Body: httpReq.GetBody}, nil
 }
+func (httpReq MockHttpRequester) Post(url, contentType string, body io.Reader) (resp *http.Response, err error) {
+	return &http.Response{Status: "Testing", StatusCode: 200}, nil
+}
 func (httpReq MockHttpRequester) Put(url string, contentLength int64, body io.Reader) (resp *http.Response, err error) {
 	return &http.Response{Status: "Testing", StatusCode: 200}, nil
 }
@@ -68,6 +71,7 @@ func (scenTest *PresigningScenarioTest) SetupDataAndStubs() []testtools.Stub {
 	stubList = append(stubList, stubs.StubCreateBucket(bucketName, testConfig.Region, nil))
 	stubList = append(stubList, stubs.StubPresignedRequest("PUT", bucketName, objectKey, nil))
 	stubList = append(stubList, stubs.StubPresignedRequest("GET", bucketName, objectKey, nil))
+	stubList = append(stubList, stubs.StubPresignedRequest("POST", bucketName, objectKey, nil))
 	stubList = append(stubList, stubs.StubPresignedRequest("DELETE", bucketName, objectKey, nil))
 
 	return stubList

gov2/s3/stubs/bucket_basics_stubs.go

@@ -208,6 +208,16 @@ func StubPresignedRequest(method string, bucketName string, objectKey string, ra
 	case "DELETE":
 		opName = "DeleteObject"
 		input = &s3.DeleteObjectInput{Bucket: aws.String(bucketName), Key: aws.String(objectKey)}
+	case "POST":
+		opName = "PutObject"
+		input = &s3.PutObjectInput{Bucket: aws.String(bucketName), Key: aws.String(objectKey)}
+		// special case since the object here is different
+		return testtools.Stub{
+			OperationName: opName,
+			Input:         input,
+			Output:        &s3.PresignedPostRequest{URL: "test-url", Values: map[string]string{}},
+			Error:         raiseErr,
+		}
 	}
 	return testtools.Stub{
 		OperationName: opName,