Removing info call before performing requests

CHANGELOG.md

@@ -20,6 +20,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 ### Deprecated
 
 ### Removed
+- Remove info call before performing every request ([#219](https://github.com/opensearch-project/opensearch-go/pull/219))
 
 ### Fixed
  - Renamed the sequence number struct tag to if_seq_no to fix optimistic concurrency control ([#166](https://github.com/opensearch-project/opensearch-go/pull/166))

internal/build/go.mod

@@ -7,7 +7,7 @@ replace github.com/opensearch-project/opensearch-go/v2 => ../../
 require (
 	github.com/alecthomas/chroma v0.8.2
 	github.com/kr/pretty v0.1.0 // indirect
-	github.com/opensearch-project/opensearch-go/v2 v2.1.0
+	github.com/opensearch-project/opensearch-go/v2 v2.2.0
 	github.com/spf13/cobra v1.6.1
 	golang.org/x/crypto v0.0.0-20210921155107-089bfa567519
 	golang.org/x/tools v0.1.12

internal/version/version.go

@@ -28,4 +28,4 @@ package version
 
 // Client returns the client version as a string.
 //
-const Client = "2.1.0"
+const Client = "2.2.0"

opensearch.go

@@ -27,19 +27,14 @@
 package opensearch
 
 import (
-	"context"
-	"encoding/json"
 	"errors"
 	"fmt"
-	"io"
-	"io/ioutil"
 	"net/http"
 	"net/url"
 	"os"
 	"regexp"
 	"strconv"
 	"strings"
-	"sync"
 	"time"
 
 	"github.com/opensearch-project/opensearch-go/v2/signer"
@@ -99,8 +94,6 @@ type Config struct {
 	EnableMetrics     bool // Enable the metrics collection.
 	EnableDebugLogger bool // Enable the debug logging.
 
-	UseResponseCheckOnly bool
-
 	RetryBackoff func(attempt int) time.Duration // Optional backoff duration. Default: nil.
 
 	Transport http.RoundTripper            // The HTTP transport object.
@@ -116,10 +109,6 @@ type Config struct {
 type Client struct {
 	*opensearchapi.API   // Embeds the API methods
 	Transport            opensearchtransport.Interface
-	useResponseCheckOnly bool
-
-	productCheckMu      sync.RWMutex
-	productCheckSuccess bool
 }
 
 type esVersion struct {
@@ -217,7 +206,7 @@ func NewClient(cfg Config) (*Client, error) {
 		return nil, fmt.Errorf("error creating transport: %s", err)
 	}
 
-	client := &Client{Transport: tp, useResponseCheckOnly: cfg.UseResponseCheckOnly}
+	client := &Client{Transport: tp}
 	client.API = opensearchapi.New(client)
 
 	if cfg.DiscoverNodesOnStart {
@@ -274,84 +263,10 @@ func ParseVersion(version string) (int64, int64, int64, error) {
 // Perform delegates to Transport to execute a request and return a response.
 //
 func (c *Client) Perform(req *http.Request) (*http.Response, error) {
-	if !c.useResponseCheckOnly {
-		// Launch product check, request info, check header then payload.
-		if err := c.doProductCheck(c.productCheck); err != nil {
-			return nil, err
-		}
-	}
-
-	// Retrieve the original request.
+	// Perform the original request.
 	return c.Transport.Perform(req)
 }
 
-// doProductCheck calls f if there as not been a prior successful call to doProductCheck,
-// returning nil otherwise.
-func (c *Client) doProductCheck(f func() error) error {
-	c.productCheckMu.RLock()
-	productCheckSuccess := c.productCheckSuccess
-	c.productCheckMu.RUnlock()
-
-	if productCheckSuccess {
-		return nil
-	}
-
-	c.productCheckMu.Lock()
-	defer c.productCheckMu.Unlock()
-
-	if c.productCheckSuccess {
-		return nil
-	}
-
-	if err := f(); err != nil {
-		return err
-	}
-
-	c.productCheckSuccess = true
-
-	return nil
-}
-
-// productCheck runs an opensearchapi.Info query to retrieve information of the current cluster
-// decodes the response and decides if the cluster can be supported or not.
-func (c *Client) productCheck() error {
-	req := opensearchapi.InfoRequest{}
-	res, err := req.Do(context.Background(), c.Transport)
-	if err != nil {
-		return err
-	}
-	defer res.Body.Close()
-
-	if res.IsError() {
-		_, err = io.Copy(ioutil.Discard, res.Body)
-		if err != nil {
-			return err
-		}
-		switch res.StatusCode {
-		case http.StatusUnauthorized:
-			return nil
-		case http.StatusForbidden:
-			return nil
-		default:
-			return fmt.Errorf("cannot retrieve information from OpenSearch")
-		}
-	}
-
-	var info info
-	contentType := res.Header.Get("Content-Type")
-	if strings.Contains(contentType, "json") {
-		err = json.NewDecoder(res.Body).Decode(&info)
-		if err != nil {
-			return fmt.Errorf("error decoding OpenSearch informations: %s", err)
-		}
-	}
-
-	if info.Version.Number != "" {
-		return checkCompatibleInfo(info)
-	}
-	return nil
-}
-
 // Metrics returns the client metrics.
 //
 func (c *Client) Metrics() (opensearchtransport.Metrics, error) {

opensearch_internal_test.go

@@ -32,10 +32,8 @@ import (
 	"errors"
 	"io/ioutil"
 	"net/http"
-	"net/http/httptest"
 	"net/url"
 	"os"
-	"reflect"
 	"regexp"
 	"strings"
 	"testing"
@@ -446,126 +444,3 @@ func TestGenuineCheckInfo(t *testing.T) {
 		})
 	}
 }
-
-func TestResponseCheckOnly(t *testing.T) {
-	tests := []struct {
-		name                 string
-		useResponseCheckOnly bool
-		response             *http.Response
-		requestErr           error
-		wantErr              bool
-	}{
-		{
-			name:                 "Valid answer without header",
-			useResponseCheckOnly: false,
-			response: &http.Response{
-				Body: ioutil.NopCloser(strings.NewReader("{}")),
-			},
-			wantErr: false,
-		},
-		{
-			name:                 "Valid answer and response check",
-			useResponseCheckOnly: true,
-			response: &http.Response{
-				Body: ioutil.NopCloser(strings.NewReader("{}")),
-			},
-			wantErr: false,
-		},
-		{
-			name:                 "Request failed",
-			useResponseCheckOnly: true,
-			response:             nil,
-			requestErr:           errors.New("request failed"),
-			wantErr:              true,
-		},
-		{
-			name:                 "Valid request, 500 response",
-			useResponseCheckOnly: false,
-			response: &http.Response{
-				StatusCode: http.StatusInternalServerError,
-				Body:       ioutil.NopCloser(strings.NewReader("")),
-			},
-			requestErr: nil,
-			wantErr:    true,
-		},
-		{
-			name:                 "Valid request, 404 response",
-			useResponseCheckOnly: false,
-			response: &http.Response{
-				StatusCode: http.StatusNotFound,
-				Body:       ioutil.NopCloser(strings.NewReader("")),
-			},
-			requestErr: nil,
-			wantErr:    true,
-		},
-		{
-			name:                 "Valid request, 403 response",
-			useResponseCheckOnly: false,
-			response: &http.Response{
-				StatusCode: http.StatusForbidden,
-				Body:       ioutil.NopCloser(strings.NewReader("")),
-			},
-			requestErr: nil,
-			wantErr:    false,
-		},
-		{
-			name:                 "Valid request, 401 response",
-			useResponseCheckOnly: false,
-			response: &http.Response{
-				StatusCode: http.StatusUnauthorized,
-				Body:       ioutil.NopCloser(strings.NewReader("")),
-			},
-			requestErr: nil,
-			wantErr:    false,
-		},
-	}
-	for _, tt := range tests {
-		t.Run(tt.name, func(t *testing.T) {
-			c, _ := NewClient(Config{
-				Transport: &mockTransp{RoundTripFunc: func(request *http.Request) (*http.Response, error) {
-					return tt.response, tt.requestErr
-				}},
-				UseResponseCheckOnly: tt.useResponseCheckOnly,
-			})
-			_, err := c.Cat.Indices()
-			if (err != nil) != tt.wantErr {
-				t.Errorf("Unexpected error, got %v, wantErr %v", err, tt.wantErr)
-			}
-		})
-	}
-}
-
-func TestProductCheckError(t *testing.T) {
-	var requestPaths []string
-	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-		requestPaths = append(requestPaths, r.URL.Path)
-		if len(requestPaths) == 1 {
-			// Simulate transient error from a proxy on the first request.
-			// This must not be cached by the client.
-			w.WriteHeader(http.StatusBadGateway)
-			return
-		}
-		w.Write([]byte("{}"))
-	}))
-	defer server.Close()
-
-	c, _ := NewClient(Config{Addresses: []string{server.URL}, DisableRetry: true})
-	if _, err := c.Cat.Indices(); err == nil {
-		t.Fatal("expected error")
-	}
-	if c.productCheckSuccess {
-		t.Fatalf("product check should be invalid, got %v", c.productCheckSuccess)
-	}
-	if _, err := c.Cat.Indices(); err != nil {
-		t.Fatalf("unexpected error: %s", err)
-	}
-	if n := len(requestPaths); n != 3 {
-		t.Fatalf("expected 3 requests, got %d", n)
-	}
-	if !reflect.DeepEqual(requestPaths, []string{"/", "/", "/_cat/indices"}) {
-		t.Fatalf("unexpected request paths: %s", requestPaths)
-	}
-	if !c.productCheckSuccess {
-		t.Fatalf("product check should be valid, got : %v", c.productCheckSuccess)
-	}
-}

opensearchapi/test/go.mod

@@ -5,7 +5,7 @@ go 1.11
 replace github.com/opensearch-project/opensearch-go/v2 => ../../
 
 require (
-	github.com/opensearch-project/opensearch-go/v2 v2.1.0
+	github.com/opensearch-project/opensearch-go/v2 v2.2.0
 
 	gopkg.in/yaml.v2 v2.4.0
 )