#1: Implemented necessary Mojang APIs

api/mojang/mojang.go

@@ -0,0 +1,87 @@
+package mojang
+
+import (
+	"bytes"
+	"encoding/json"
+	"io/ioutil"
+	"net/http"
+)
+
+var HttpClient = &http.Client{}
+
+type SignedTexturesResponse struct {
+	Id    string     `json:"id"`
+	Name  string     `json:"name"`
+	Props []Property `json:"properties"`
+}
+
+type Property struct {
+	Name      string `json:"name"`
+	Signature string `json:"signature,omitempty"`
+	Value     string `json:"value"`
+}
+
+type ProfileInfo struct {
+	Id       string `json:"id"`
+	Name     string `json:"name"`
+	IsLegacy bool   `json:"legacy,omitempty"`
+	IsDemo   bool   `json:"demo,omitempty"`
+}
+
+func UsernamesToUuids(usernames []string) ([]*ProfileInfo, error) {
+	requestBody, _ := json.Marshal(usernames)
+	request, err := http.NewRequest("POST", "https://api.mojang.com/profiles/minecraft", bytes.NewBuffer(requestBody))
+	if err != nil {
+		panic(err)
+	}
+
+	request.Header.Set("Content-Type", "application/json")
+
+	response, err := HttpClient.Do(request)
+	if err != nil {
+		return nil, err
+	}
+	defer response.Body.Close()
+
+	if response.StatusCode == 429 {
+		return nil, &TooManyRequestsError{}
+	}
+
+	var result []*ProfileInfo
+
+	body, _ := ioutil.ReadAll(response.Body)
+	_ = json.Unmarshal(body, &result)
+
+	return result, nil
+}
+
+func UuidToTextures(uuid string) (*SignedTexturesResponse, error) {
+	request, err := http.NewRequest("GET", "https://sessionserver.mojang.com/session/minecraft/profile/"+uuid, nil)
+	if err != nil {
+		panic(err)
+	}
+
+	response, err := HttpClient.Do(request)
+	if err != nil {
+		return nil, err
+	}
+	defer response.Body.Close()
+
+	if response.StatusCode == 429 {
+		return nil, &TooManyRequestsError{}
+	}
+
+	var result *SignedTexturesResponse
+
+	body, _ := ioutil.ReadAll(response.Body)
+	_ = json.Unmarshal(body, &result)
+
+	return result, nil
+}
+
+type TooManyRequestsError struct {
+}
+
+func (e *TooManyRequestsError) Error() string {
+	return "Too Many Requests"
+}

api/mojang/mojang_test.go

@@ -0,0 +1,130 @@
+package mojang
+
+import (
+	"net/http"
+	"testing"
+
+	testify "github.com/stretchr/testify/assert"
+	"gopkg.in/h2non/gock.v1"
+)
+
+func TestUsernamesToUuidsCorrectResponse(t *testing.T) {
+	assert := testify.New(t)
+
+	defer gock.Off()
+	gock.New("https://api.mojang.com").
+		Post("/profiles/minecraft").
+		JSON([]string{"Thinkofdeath", "maksimkurb"}).
+		Reply(200).
+		JSON([]map[string]interface{}{
+			{
+				"id":     "4566e69fc90748ee8d71d7ba5aa00d20",
+				"name":   "Thinkofdeath",
+				"legacy": false,
+				"demo":   true,
+			},
+			{
+				"id":   "0d252b7218b648bfb86c2ae476954d32",
+				"name": "maksimkurb",
+				// There is no legacy or demo fields
+			},
+		})
+
+	client := &http.Client{}
+	gock.InterceptClient(client)
+
+	HttpClient = client
+
+	result, err := UsernamesToUuids([]string{"Thinkofdeath", "maksimkurb"})
+	if assert.NoError(err) {
+		assert.Len(result, 2)
+		assert.Equal("4566e69fc90748ee8d71d7ba5aa00d20", result[0].Id)
+		assert.Equal("Thinkofdeath", result[0].Name)
+		assert.False(result[0].IsLegacy)
+		assert.True(result[0].IsDemo)
+
+		assert.Equal("0d252b7218b648bfb86c2ae476954d32", result[1].Id)
+		assert.Equal("maksimkurb", result[1].Name)
+		assert.False(result[1].IsLegacy)
+		assert.False(result[1].IsDemo)
+	}
+}
+
+func TestUsernamesToUuidsTooManyRequests(t *testing.T) {
+	assert := testify.New(t)
+
+	defer gock.Off()
+	gock.New("https://api.mojang.com").
+		Post("/profiles/minecraft").
+		Reply(429).
+		JSON(map[string]interface{}{
+			"error":        "TooManyRequestsException",
+			"errorMessage": "The client has sent too many requests within a certain amount of time",
+		})
+
+	client := &http.Client{}
+	gock.InterceptClient(client)
+
+	HttpClient = client
+
+	result, err := UsernamesToUuids([]string{"Thinkofdeath", "maksimkurb"})
+	assert.Nil(result)
+	assert.IsType(&TooManyRequestsError{}, err)
+	assert.EqualError(err, "Too Many Requests")
+}
+
+func TestUuidToTexturesCorrectResponse(t *testing.T) {
+	assert := testify.New(t)
+
+	defer gock.Off()
+	gock.New("https://sessionserver.mojang.com").
+		Get("/session/minecraft/profile/4566e69fc90748ee8d71d7ba5aa00d20").
+		Reply(200).
+		JSON(map[string]interface{}{
+			"id":   "4566e69fc90748ee8d71d7ba5aa00d20",
+			"name": "Thinkofdeath",
+			"properties": []interface{}{
+				map[string]interface{}{
+					"name":  "textures",
+					"value": "eyJ0aW1lc3RhbXAiOjE1NDMxMDczMDExODUsInByb2ZpbGVJZCI6IjQ1NjZlNjlmYzkwNzQ4ZWU4ZDcxZDdiYTVhYTAwZDIwIiwicHJvZmlsZU5hbWUiOiJUaGlua29mZGVhdGgiLCJ0ZXh0dXJlcyI6eyJTS0lOIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvNzRkMWUwOGIwYmI3ZTlmNTkwYWYyNzc1ODEyNWJiZWQxNzc4YWM2Y2VmNzI5YWVkZmNiOTYxM2U5OTExYWU3NSJ9LCJDQVBFIjp7InVybCI6Imh0dHA6Ly90ZXh0dXJlcy5taW5lY3JhZnQubmV0L3RleHR1cmUvYjBjYzA4ODQwNzAwNDQ3MzIyZDk1M2EwMmI5NjVmMWQ2NWExM2E2MDNiZjY0YjE3YzgwM2MyMTQ0NmZlMTYzNSJ9fX0=",
+				},
+			},
+		})
+
+	client := &http.Client{}
+	gock.InterceptClient(client)
+
+	HttpClient = client
+
+	result, err := UuidToTextures("4566e69fc90748ee8d71d7ba5aa00d20")
+	if assert.NoError(err) {
+		assert.Equal("4566e69fc90748ee8d71d7ba5aa00d20", result.Id)
+		assert.Equal("Thinkofdeath", result.Name)
+		assert.Equal(1, len(result.Props))
+		assert.Equal("textures", result.Props[0].Name)
+		assert.Equal(476, len(result.Props[0].Value))
+	}
+}
+
+func TestUuidToTexturesTooManyRequests(t *testing.T) {
+	assert := testify.New(t)
+
+	defer gock.Off()
+	gock.New("https://sessionserver.mojang.com").
+		Get("/session/minecraft/profile/4566e69fc90748ee8d71d7ba5aa00d20").
+		Reply(429).
+		JSON(map[string]interface{}{
+			"error":        "TooManyRequestsException",
+			"errorMessage": "The client has sent too many requests within a certain amount of time",
+		})
+
+	client := &http.Client{}
+	gock.InterceptClient(client)
+
+	HttpClient = client
+
+	result, err := UuidToTextures("4566e69fc90748ee8d71d7ba5aa00d20")
+	assert.Nil(result)
+	assert.IsType(&TooManyRequestsError{}, err)
+	assert.EqualError(err, "Too Many Requests")
+}

http/signed_textures.go

@@ -5,21 +5,10 @@ import (
 	"net/http"
 	"strings"
 
+	"github.com/elyby/chrly/api/mojang"
 	"github.com/gorilla/mux"
 )
 
-type signedTexturesResponse struct {
-	Id    string     `json:"id"`
-	Name  string     `json:"name"`
-	Props []property `json:"properties"`
-}
-
-type property struct {
-	Name      string `json:"name"`
-	Signature string `json:"signature,omitempty"`
-	Value     string `json:"value"`
-}
-
 func (cfg *Config) SignedTextures(response http.ResponseWriter, request *http.Request) {
 	cfg.Logger.IncCounter("signed_textures.request", 1)
 	username := parseUsername(mux.Vars(request)["username"])
@@ -30,23 +19,23 @@ func (cfg *Config) SignedTextures(response http.ResponseWriter, request *http.Re
 		return
 	}
 
-	responseData:= signedTexturesResponse{
-		Id: strings.Replace(rec.Uuid, "-", "", -1),
+	responseData := mojang.SignedTexturesResponse{
+		Id:   strings.Replace(rec.Uuid, "-", "", -1),
 		Name: rec.Username,
-		Props: []property{
+		Props: []mojang.Property{
 			{
-				Name: "textures",
+				Name:      "textures",
 				Signature: rec.MojangSignature,
-				Value: rec.MojangTextures,
+				Value:     rec.MojangTextures,
 			},
 			{
-				Name: "chrly",
+				Name:  "chrly",
 				Value: "how do you tame a horse in Minecraft?",
 			},
 		},
 	}
 
-	responseJson,_ := json.Marshal(responseData)
+	responseJson, _ := json.Marshal(responseData)
 	response.Header().Set("Content-Type", "application/json")
 	response.Write(responseJson)
 }