Implemented remote api mojang uuids provider

CHANGELOG.md

@@ -6,6 +6,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased] - xxxx-xx-xx
 ### Added
+- Added remote mode for Mojang's textures queue.
 - New StatsD metrics:
   - Counters:
     - `ely.skinsystem.{hostname}.app.mojang_textures.usernames.textures_hit`

cmd/serve.go

@@ -3,8 +3,10 @@ package cmd
 import (
 	"fmt"
 	"log"
+	"net/url"
 	"time"
 
+	"github.com/mono83/slf/wd"
 	"github.com/spf13/cobra"
 	"github.com/spf13/viper"
 
@@ -19,6 +21,7 @@ var serveCmd = &cobra.Command{
 	Use:   "serve",
 	Short: "Starts http handler for the skins system",
 	Run: func(cmd *cobra.Command, args []string) {
+		// TODO: this is a mess, need to organize this code somehow to make services initialization more compact
 		logger, err := bootstrap.CreateLogger(viper.GetString("statsd.addr"), viper.GetString("sentry.dsn"))
 		if err != nil {
 			log.Fatal(fmt.Printf("Cannot initialize logger: %v", err))
@@ -52,15 +55,32 @@ var serveCmd = &cobra.Command{
 			return
 		}
 
+		var uuidsProvider mojangtextures.UuidsProvider
+		preferredUuidsProvider := viper.GetString("mojang_textures.uuids_provider.driver")
+		if preferredUuidsProvider == "remote" {
+			remoteUrl, err := url.Parse(viper.GetString("mojang_textures.uuids_provider.url"))
+			if err != nil {
+				logger.Emergency("Unable to parse remote url :err", wd.ErrParam(err))
+				return
+			}
+
+			uuidsProvider = &mojangtextures.RemoteApiUuidsProvider{
+				Url:    *remoteUrl,
+				Logger: logger,
+			}
+		} else {
+			uuidsProvider = &mojangtextures.BatchUuidsProvider{
+				IterationDelay: time.Duration(viper.GetInt("queue.loop_delay")) * time.Millisecond,
+				IterationSize:  viper.GetInt("queue.batch_size"),
+				Logger:         logger,
+			}
+		}
+
 		texturesStorage := mojangtextures.NewInMemoryTexturesStorage()
 		texturesStorage.Start()
 		mojangTexturesProvider := &mojangtextures.Provider{
 			Logger:        logger,
-			UuidsProvider: &mojangtextures.BatchUuidsProvider{
+			UuidsProvider: uuidsProvider,
-				IterationDelay: time.Duration(viper.GetInt("queue.loop_delay")) * time.Millisecond,
-				IterationSize:  viper.GetInt("queue.batch_size"),
-				Logger:         logger,
-			},
 			TexturesProvider: &mojangtextures.MojangApiTexturesProvider{
 				Logger: logger,
 			},

mojangtextures/remote_api_uuids_provider.go

@@ -0,0 +1,71 @@
+package mojangtextures
+
+import (
+	"encoding/json"
+	"io/ioutil"
+	"net/http"
+	. "net/url"
+	"path"
+	"time"
+
+	"github.com/mono83/slf/wd"
+
+	"github.com/elyby/chrly/api/mojang"
+	"github.com/elyby/chrly/bootstrap"
+)
+
+var HttpClient = &http.Client{
+	Transport: &http.Transport{
+		MaxIdleConnsPerHost: 1024,
+	},
+}
+
+type RemoteApiUuidsProvider struct {
+	Url    URL
+	Logger wd.Watchdog
+}
+
+func (ctx *RemoteApiUuidsProvider) GetUuid(username string) (*mojang.ProfileInfo, error) {
+	ctx.Logger.IncCounter("mojang_textures.usernames.request", 1)
+
+	url := ctx.Url
+	url.Path = path.Join(url.Path, username)
+
+	request, _ := http.NewRequest("GET", url.String(), nil)
+	request.Header.Add("Accept", "application/json")
+	// Change default User-Agent to allow specify "Username -> UUID at time" Mojang's api endpoint
+	request.Header.Add("User-Agent", "Chrly/"+bootstrap.GetVersion())
+
+	start := time.Now()
+	response, err := HttpClient.Do(request)
+	ctx.Logger.RecordTimer("mojang_textures.usernames.request_time", time.Since(start))
+	if err != nil {
+		return nil, err
+	}
+	defer response.Body.Close()
+
+	if response.StatusCode == 204 {
+		return nil, nil
+	}
+
+	if response.StatusCode != 200 {
+		return nil, &UnexpectedRemoteApiResponse{response}
+	}
+
+	var result *mojang.ProfileInfo
+	body, _ := ioutil.ReadAll(response.Body)
+	err = json.Unmarshal(body, &result)
+	if err != nil {
+		return nil, err
+	}
+
+	return result, nil
+}
+
+type UnexpectedRemoteApiResponse struct {
+	Response *http.Response
+}
+
+func (*UnexpectedRemoteApiResponse) Error() string {
+	return "Unexpected remote api response"
+}

mojangtextures/remote_api_uuids_provider_test.go

@@ -0,0 +1,149 @@
+package mojangtextures
+
+import (
+	"net"
+	"net/http"
+	"net/url"
+	"testing"
+
+	"github.com/h2non/gock"
+	"github.com/stretchr/testify/mock"
+	"github.com/stretchr/testify/suite"
+
+	mocks "github.com/elyby/chrly/tests"
+)
+
+type remoteApiUuidsProviderTestSuite struct {
+	suite.Suite
+
+	Provider *RemoteApiUuidsProvider
+	Logger   *mocks.WdMock
+}
+
+func (suite *remoteApiUuidsProviderTestSuite) SetupSuite() {
+	client := &http.Client{}
+	gock.InterceptClient(client)
+
+	HttpClient = client
+}
+
+func (suite *remoteApiUuidsProviderTestSuite) SetupTest() {
+	suite.Logger = &mocks.WdMock{}
+	suite.Provider = &RemoteApiUuidsProvider{
+		Logger: suite.Logger,
+	}
+}
+
+func (suite *remoteApiUuidsProviderTestSuite) TearDownTest() {
+	suite.Logger.AssertExpectations(suite.T())
+	gock.Off()
+}
+
+func TestRemoteApiUuidsProvider(t *testing.T) {
+	suite.Run(t, new(remoteApiUuidsProviderTestSuite))
+}
+
+func (suite *remoteApiUuidsProviderTestSuite) TestGetUuidForValidUsername() {
+	suite.Logger.On("IncCounter", "mojang_textures.usernames.request", int64(1)).Once()
+	suite.Logger.On("RecordTimer", "mojang_textures.usernames.request_time", mock.Anything).Once()
+
+	gock.New("http://example.com").
+		Get("/subpath/username").
+		Reply(200).
+		JSON(map[string]interface{}{
+			"id":   "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
+			"name": "username",
+		})
+
+	suite.Provider.Url = shouldParseUrl("http://example.com/subpath")
+	result, err := suite.Provider.GetUuid("username")
+
+	assert := suite.Assert()
+	if assert.NoError(err) {
+		assert.Equal("aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa", result.Id)
+		assert.Equal("username", result.Name)
+		assert.False(result.IsLegacy)
+		assert.False(result.IsDemo)
+	}
+}
+
+func (suite *remoteApiUuidsProviderTestSuite) TestGetUuidForNotExistsUsername() {
+	suite.Logger.On("IncCounter", "mojang_textures.usernames.request", int64(1)).Once()
+	suite.Logger.On("RecordTimer", "mojang_textures.usernames.request_time", mock.Anything).Once()
+
+	gock.New("http://example.com").
+		Get("/subpath/username").
+		Reply(204)
+
+	suite.Provider.Url = shouldParseUrl("http://example.com/subpath")
+	result, err := suite.Provider.GetUuid("username")
+
+	assert := suite.Assert()
+	assert.Nil(result)
+	assert.Nil(err)
+}
+
+func (suite *remoteApiUuidsProviderTestSuite) TestGetUuidForNon20xResponse() {
+	suite.Logger.On("IncCounter", "mojang_textures.usernames.request", int64(1)).Once()
+	suite.Logger.On("RecordTimer", "mojang_textures.usernames.request_time", mock.Anything).Once()
+
+	gock.New("http://example.com").
+		Get("/subpath/username").
+		Reply(504).
+		BodyString("504 Gateway Timeout")
+
+	suite.Provider.Url = shouldParseUrl("http://example.com/subpath")
+	result, err := suite.Provider.GetUuid("username")
+
+	assert := suite.Assert()
+	assert.Nil(result)
+	assert.EqualError(err, "Unexpected remote api response")
+}
+
+func (suite *remoteApiUuidsProviderTestSuite) TestGetUuidForNotSuccessRequest() {
+	suite.Logger.On("IncCounter", "mojang_textures.usernames.request", int64(1)).Once()
+	suite.Logger.On("RecordTimer", "mojang_textures.usernames.request_time", mock.Anything).Once()
+
+	expectedError := &net.OpError{Op: "dial"}
+
+	gock.New("http://example.com").
+		Get("/subpath/username").
+		ReplyError(expectedError)
+
+	suite.Provider.Url = shouldParseUrl("http://example.com/subpath")
+	result, err := suite.Provider.GetUuid("username")
+
+	assert := suite.Assert()
+	assert.Nil(result)
+	if assert.Error(err) {
+		assert.IsType(&url.Error{}, err)
+		casterErr, _ := err.(*url.Error)
+		assert.Equal(expectedError, casterErr.Err)
+	}
+}
+
+func (suite *remoteApiUuidsProviderTestSuite) TestGetUuidForInvalidSuccessResponse() {
+	suite.Logger.On("IncCounter", "mojang_textures.usernames.request", int64(1)).Once()
+	suite.Logger.On("RecordTimer", "mojang_textures.usernames.request_time", mock.Anything).Once()
+
+	gock.New("http://example.com").
+		Get("/subpath/username").
+		Reply(200).
+		BodyString("completely not json")
+
+	suite.Provider.Url = shouldParseUrl("http://example.com/subpath")
+	result, err := suite.Provider.GetUuid("username")
+
+	assert := suite.Assert()
+	assert.Nil(result)
+	assert.Error(err)
+}
+
+func shouldParseUrl(rawUrl string) url.URL {
+	url, err := url.Parse(rawUrl)
+	if err != nil {
+		panic(err)
+	}
+
+	return *url
+}