Remove Response type (Azure#15294)

Just return an *http.Response instead.
Changed Response methods to functions.

sdk/azcore/core.go

@@ -27,15 +27,15 @@ type Policy interface {
 	// Do applies the policy to the specified Request.  When implementing a Policy, mutate the
 	// request before calling req.Next() to move on to the next policy, and respond to the result
 	// before returning to the caller.
-	Do(req *Request) (*Response, error)
+	Do(req *Request) (*http.Response, error)
 }
 
 // policyFunc is a type that implements the Policy interface.
 // Use this type when implementing a stateless policy as a first-class function.
-type policyFunc func(*Request) (*Response, error)
+type policyFunc func(*Request) (*http.Response, error)
 
 // Do implements the Policy interface on PolicyFunc.
-func (pf policyFunc) Do(req *Request) (*Response, error) {
+func (pf policyFunc) Do(req *Request) (*http.Response, error) {
 	return pf(req)
 }
 
@@ -50,7 +50,7 @@ type transportPolicy struct {
 	trans Transporter
 }
 
-func (tp transportPolicy) Do(req *Request) (*Response, error) {
+func (tp transportPolicy) Do(req *Request) (*http.Response, error) {
 	resp, err := tp.trans.Do(req.Request)
 	if err != nil {
 		return nil, err
@@ -59,7 +59,7 @@ func (tp transportPolicy) Do(req *Request) (*Response, error) {
 		// this ensures the retry policy will retry the request
 		return nil, errors.New("received nil response")
 	}
-	return &Response{Response: resp}, nil
+	return resp, nil
 }
 
 // Pipeline represents a primitive for sending HTTP requests and receiving responses.
@@ -84,7 +84,7 @@ func NewPipeline(transport Transporter, policies ...Policy) Pipeline {
 // Do is called for each and every HTTP request. It passes the request through all
 // the Policy objects (which can transform the Request's URL/query parameters/headers)
 // and ultimately sends the transformed HTTP request over the network.
-func (p Pipeline) Do(req *Request) (*Response, error) {
+func (p Pipeline) Do(req *Request) (*http.Response, error) {
 	if err := req.valid(); err != nil {
 		return nil, err
 	}

sdk/azcore/policy_anonymous_credential.go

@@ -5,11 +5,13 @@
 
 package azcore
 
+import "net/http"
+
 func anonCredAuthPolicyFunc(AuthenticationOptions) Policy {
 	return policyFunc(anonCredPolicyFunc)
 }
 
-func anonCredPolicyFunc(req *Request) (*Response, error) {
+func anonCredPolicyFunc(req *Request) (*http.Response, error) {
 	return req.Next()
 }
 

sdk/azcore/policy_body_download.go

@@ -15,7 +15,7 @@ import (
 )
 
 // bodyDownloadPolicy creates a policy object that downloads the response's body to a []byte.
-func bodyDownloadPolicy(req *Request) (*Response, error) {
+func bodyDownloadPolicy(req *Request) (*http.Response, error) {
 	resp, err := req.Next()
 	if err != nil {
 		return resp, err

sdk/azcore/policy_body_download_test.go

@@ -29,7 +29,7 @@ func TestDownloadBody(t *testing.T) {
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
-	payload, err := resp.Payload()
+	payload, err := Payload(resp)
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
@@ -57,7 +57,7 @@ func TestSkipBodyDownload(t *testing.T) {
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
-	payload, err := resp.Payload()
+	payload, err := Payload(resp)
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
@@ -80,7 +80,7 @@ func TestDownloadBodyFail(t *testing.T) {
 	if err == nil {
 		t.Fatal("unexpected nil error")
 	}
-	payload, err := resp.Payload()
+	payload, err := Payload(resp)
 	if err == nil {
 		t.Fatalf("expected an error")
 	}
@@ -106,7 +106,7 @@ func TestDownloadBodyWithRetryGet(t *testing.T) {
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
-	payload, err := resp.Payload()
+	payload, err := Payload(resp)
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
@@ -138,7 +138,7 @@ func TestDownloadBodyWithRetryDelete(t *testing.T) {
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
-	payload, err := resp.Payload()
+	payload, err := Payload(resp)
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
@@ -170,7 +170,7 @@ func TestDownloadBodyWithRetryPut(t *testing.T) {
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
-	payload, err := resp.Payload()
+	payload, err := Payload(resp)
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
@@ -205,7 +205,7 @@ func TestDownloadBodyWithRetryPatch(t *testing.T) {
 	if _, ok := err.(*bodyDownloadError); !ok {
 		t.Fatal("expected *bodyDownloadError type")
 	}
-	payload, err := resp.Payload()
+	payload, err := Payload(resp)
 	if err == nil {
 		t.Fatalf("expected an error")
 	}
@@ -235,7 +235,7 @@ func TestDownloadBodyWithRetryPost(t *testing.T) {
 	if err == nil {
 		t.Fatal("unexpected nil error")
 	}
-	payload, err := resp.Payload()
+	payload, err := Payload(resp)
 	if err == nil {
 		t.Fatalf("expected an error")
 	}
@@ -264,7 +264,7 @@ func TestSkipBodyDownloadWith400(t *testing.T) {
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
-	payload, err := resp.Payload()
+	payload, err := Payload(resp)
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
@@ -292,7 +292,7 @@ func TestReadBodyAfterSeek(t *testing.T) {
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}
-	payload, err := resp.Payload()
+	payload, err := Payload(resp)
 	if err != nil {
 		t.Fatalf("unexpected error: %v", err)
 	}

sdk/azcore/policy_http_header.go

@@ -14,7 +14,7 @@ import (
 type ctxWithHTTPHeader struct{}
 
 // newHTTPHeaderPolicy creates a policy object that adds custom HTTP headers to a request
-func httpHeaderPolicy(req *Request) (*Response, error) {
+func httpHeaderPolicy(req *Request) (*http.Response, error) {
 	// check if any custom HTTP headers have been specified
 	if header := req.Context().Value(ctxWithHTTPHeader{}); header != nil {
 		for k, v := range header.(http.Header) {

sdk/azcore/policy_logging.go

@@ -8,6 +8,7 @@ package azcore
 import (
 	"bytes"
 	"fmt"
+	"net/http"
 	"strings"
 	"time"
 
@@ -42,7 +43,7 @@ type logPolicyOpValues struct {
 	start time.Time
 }
 
-func (p *logPolicy) Do(req *Request) (*Response, error) {
+func (p *logPolicy) Do(req *Request) (*http.Response, error) {
 	// Get the per-operation values. These are saved in the Message's map so that they persist across each retry calling into this policy object.
 	var opValues logPolicyOpValues
 	if req.OperationValue(&opValues); opValues.start.IsZero() {
@@ -88,7 +89,7 @@ func (p *logPolicy) Do(req *Request) (*Response, error) {
 			// skip frames runtime.Callers() and runtime.StackTrace()
 			b.WriteString(diag.StackTrace(2, StackFrameCount))
 		} else if p.options.IncludeBody {
-			err = response.writeBody(b)
+			err = writeBody(response, b)
 		}
 		log.Write(log.Response, b.String())
 	}

sdk/azcore/policy_retry.go

@@ -124,7 +124,7 @@ type retryPolicy struct {
 	options RetryOptions
 }
 
-func (p *retryPolicy) Do(req *Request) (resp *Response, err error) {
+func (p *retryPolicy) Do(req *Request) (resp *http.Response, err error) {
 	options := p.options
 	// check if the retry options have been overridden for this call
 	if override := req.Context().Value(ctxWithRetryOptionsKey{}); override != nil {
@@ -170,7 +170,7 @@ func (p *retryPolicy) Do(req *Request) (resp *Response, err error) {
 			log.Writef(log.RetryPolicy, "error %v", err)
 		}
 
-		if err == nil && !resp.HasStatusCode(options.StatusCodes...) {
+		if err == nil && !HasStatusCode(resp, options.StatusCodes...) {
 			// if there is no error and the response code isn't in the list of retry codes then we're done.
 			return
 		} else if ctxErr := req.Context().Err(); ctxErr != nil {
@@ -195,10 +195,10 @@ func (p *retryPolicy) Do(req *Request) (resp *Response, err error) {
 		}
 
 		// drain before retrying so nothing is leaked
-		resp.Drain()
+		Drain(resp)
 
 		// use the delay from retry-after if available
-		delay := resp.retryAfter()
+		delay := RetryAfter(resp)
 		if delay <= 0 {
 			delay = options.calcDelay(try)
 		}

sdk/azcore/policy_retry_test.go

@@ -91,7 +91,7 @@ func TestRetryPolicyFailOnStatusCodeRespBodyPreserved(t *testing.T) {
 	srv.SetResponse(mock.WithStatusCode(http.StatusInternalServerError), mock.WithBody([]byte(respBody)))
 	// add a per-request policy that reads and restores the request body.
 	// this is to simulate how something like httputil.DumpRequest works.
-	pl := NewPipeline(srv, policyFunc(func(r *Request) (*Response, error) {
+	pl := NewPipeline(srv, policyFunc(func(r *Request) (*http.Response, error) {
 		b, err := ioutil.ReadAll(r.Body)
 		if err != nil {
 			t.Fatal(err)

sdk/azcore/policy_telemetry.go

@@ -8,6 +8,7 @@ package azcore
 import (
 	"bytes"
 	"fmt"
+	"net/http"
 	"os"
 	"runtime"
 	"strings"
@@ -64,7 +65,7 @@ func NewTelemetryPolicy(o *TelemetryOptions) Policy {
 	return &tp
 }
 
-func (p telemetryPolicy) Do(req *Request) (*Response, error) {
+func (p telemetryPolicy) Do(req *Request) (*http.Response, error) {
 	if p.telemetryValue == "" {
 		return req.Next()
 	}