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|
package requestcompression
import (
"bytes"
"compress/gzip"
"context"
"fmt"
"github.com/aws/smithy-go/middleware"
"github.com/aws/smithy-go/transport/http"
"io"
"reflect"
"strings"
"testing"
)
func TestRequestCompression(t *testing.T) {
cases := map[string]struct {
DisableRequestCompression bool
RequestMinCompressSizeBytes int64
ContentLength int64
Header map[string][]string
Stream io.Reader
ExpectedStream []byte
ExpectedHeader map[string][]string
}{
"GZip request stream": {
Stream: strings.NewReader("Hi, world!"),
ExpectedStream: []byte("Hi, world!"),
ExpectedHeader: map[string][]string{
"Content-Encoding": {"gzip"},
},
},
"GZip request stream with existing encoding header": {
Stream: strings.NewReader("Hi, world!"),
ExpectedStream: []byte("Hi, world!"),
Header: map[string][]string{
"Content-Encoding": {"custom"},
},
ExpectedHeader: map[string][]string{
"Content-Encoding": {"custom, gzip"},
},
},
"GZip request stream smaller than min compress request size": {
RequestMinCompressSizeBytes: 100,
Stream: strings.NewReader("Hi, world!"),
ExpectedStream: []byte("Hi, world!"),
ExpectedHeader: map[string][]string{},
},
"Disable GZip request stream": {
DisableRequestCompression: true,
Stream: strings.NewReader("Hi, world!"),
ExpectedStream: []byte("Hi, world!"),
ExpectedHeader: map[string][]string{},
},
}
for name, c := range cases {
t.Run(name, func(t *testing.T) {
var err error
req := http.NewStackRequest().(*http.Request)
req.ContentLength = c.ContentLength
req, _ = req.SetStream(c.Stream)
if c.Header != nil {
req.Header = c.Header
}
var updatedRequest *http.Request
m := requestCompression{
disableRequestCompression: c.DisableRequestCompression,
requestMinCompressSizeBytes: c.RequestMinCompressSizeBytes,
compressAlgorithms: []string{GZIP},
}
_, _, err = m.HandleSerialize(context.Background(),
middleware.SerializeInput{Request: req},
middleware.SerializeHandlerFunc(func(ctx context.Context, input middleware.SerializeInput) (
out middleware.SerializeOutput, metadata middleware.Metadata, err error) {
updatedRequest = input.Request.(*http.Request)
return out, metadata, nil
}),
)
if err != nil {
t.Fatalf("expect no error, got %v", err)
}
if stream := updatedRequest.GetStream(); stream != nil {
if err := testUnzipContent(stream, c.ExpectedStream, c.DisableRequestCompression, c.RequestMinCompressSizeBytes); err != nil {
t.Errorf("error while checking request stream: %q", err)
}
}
if e, a := c.ExpectedHeader, map[string][]string(updatedRequest.Header); !reflect.DeepEqual(e, a) {
t.Errorf("expect request header to be %q, got %q", e, a)
}
})
}
}
func testUnzipContent(content io.Reader, expect []byte, disableRequestCompression bool, requestMinCompressionSizeBytes int64) error {
if disableRequestCompression || int64(len(expect)) < requestMinCompressionSizeBytes {
b, err := io.ReadAll(content)
if err != nil {
return fmt.Errorf("error while reading request")
}
if e, a := expect, b; !bytes.Equal(e, a) {
return fmt.Errorf("expect content to be %s, got %s", e, a)
}
} else {
r, err := gzip.NewReader(content)
if err != nil {
return fmt.Errorf("error while reading request")
}
var actualBytes bytes.Buffer
_, err = actualBytes.ReadFrom(r)
if err != nil {
return fmt.Errorf("error while unzipping request payload")
}
if e, a := expect, actualBytes.Bytes(); !bytes.Equal(e, a) {
return fmt.Errorf("expect unzipped content to be %s, got %s", e, a)
}
}
return nil
}
|
