DXCDT-520: Use a custom client with retries for auth0 api client config

go.mod

@@ -3,6 +3,7 @@ module github.com/auth0/terraform-provider-auth0
 go 1.21
 
 require (
+	github.com/PuerkitoBio/rehttp v1.2.0
 	github.com/auth0/go-auth0 v1.0.0
 	github.com/google/go-cmp v0.5.9
 	github.com/hashicorp/go-cty v1.4.1-0.20200414143053-d3edf31b6320
@@ -19,7 +20,6 @@ require (
 	github.com/Masterminds/semver/v3 v3.1.1 // indirect
 	github.com/Masterminds/sprig/v3 v3.2.2 // indirect
 	github.com/ProtonMail/go-crypto v0.0.0-20230217124315-7d5c6f04bbb8 // indirect
-	github.com/PuerkitoBio/rehttp v1.2.0 // indirect
 	github.com/agext/levenshtein v1.2.3 // indirect
 	github.com/apparentlymart/go-textseg/v13 v13.0.0 // indirect
 	github.com/armon/go-radix v1.0.0 // indirect

go.sum

@@ -6,11 +6,13 @@ github.com/Masterminds/sprig/v3 v3.2.1/go.mod h1:UoaO7Yp8KlPnJIYWTFkMaqPUYKTfGFP
 github.com/Masterminds/sprig/v3 v3.2.2 h1:17jRggJu518dr3QaafizSXOjKYp94wKfABxUmyxvxX8=
 github.com/Masterminds/sprig/v3 v3.2.2/go.mod h1:UoaO7Yp8KlPnJIYWTFkMaqPUYKTfGFPhxNuwnnxkKlk=
 github.com/Microsoft/go-winio v0.5.2 h1:a9IhgEQBCUEk6QCdml9CiJGhAws+YwffDHEMp1VMrpA=
+github.com/Microsoft/go-winio v0.5.2/go.mod h1:WpS1mjBmmwHBEWmogvA2mj8546UReBk4v8QkMxJ6pZY=
 github.com/ProtonMail/go-crypto v0.0.0-20230217124315-7d5c6f04bbb8 h1:wPbRQzjjwFc0ih8puEVAOFGELsn1zoIIYdxvML7mDxA=
 github.com/ProtonMail/go-crypto v0.0.0-20230217124315-7d5c6f04bbb8/go.mod h1:I0gYDMZ6Z5GRU7l58bNFSkPTFN6Yl12dsUlAZ8xy98g=
 github.com/PuerkitoBio/rehttp v1.2.0 h1:V8MGVcDwR+u/xwLlMrw5YZONDm3JISEKqwJTiIuJA+s=
 github.com/PuerkitoBio/rehttp v1.2.0/go.mod h1:LUwKPoDbDIA2RL5wYZCNsQ90cx4OJ4AWBmq6KzWZL1s=
 github.com/acomagu/bufpipe v1.0.4 h1:e3H4WUzM3npvo5uv95QuJM3cQspFNtFBzvJ2oNjKIDQ=
+github.com/acomagu/bufpipe v1.0.4/go.mod h1:mxdxdup/WdsKVreO5GpW4+M/1CE2sMG4jeGJ2sYmHc4=
 github.com/agext/levenshtein v1.2.3 h1:YB2fHEn0UJagG8T1rrWknE3ZQzWM06O8AMAatNn7lmo=
 github.com/agext/levenshtein v1.2.3/go.mod h1:JEDfjyjHDjOF/1e4FlBE/PkbqA9OfWu2ki2W0IB5558=
 github.com/apparentlymart/go-textseg/v12 v12.0.0/go.mod h1:S/4uRK2UtaQttw1GenVJEynmyUenKwP++x/+DdGV/Ec=
@@ -36,14 +38,20 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/dustin/go-humanize v1.0.0/go.mod h1:HtrtbFcZ19U5GC7JDqmcUSB87Iq5E25KnS6fMYU6eOk=
 github.com/emirpasic/gods v1.18.1 h1:FXtiHYKDGKCW2KzwZKx0iC0PQmdlorYgdFG9jPXJ1Bc=
+github.com/emirpasic/gods v1.18.1/go.mod h1:8tpGGwCnJ5H4r6BWwaV6OrWmMoPhUl5jm/FMNAnJvWQ=
 github.com/fatih/color v1.7.0/go.mod h1:Zm6kSWBoL9eyXnKyktHP6abPY2pDugNf5KwzbycvMj4=
 github.com/fatih/color v1.13.0 h1:8LOYc1KYPPmyKMuN8QV2DNRWNbLo6LZ0iLs8+mlH53w=
 github.com/fatih/color v1.13.0/go.mod h1:kLAiJbzzSOZDVNGyDpeOxJ47H46qBXwg5ILebYFFOfk=
 github.com/frankban/quicktest v1.14.3 h1:FJKSZTDHjyhriyC81FLQ0LY93eSai0ZyR/ZIkd3ZUKE=
+github.com/frankban/quicktest v1.14.3/go.mod h1:mgiwOwqx65TmIk1wJ6Q7wvnVMocbUorkibMOrVTHZps=
 github.com/go-git/gcfg v1.5.0 h1:Q5ViNfGF8zFgyJWPqYwA7qGFoMTEiBmdlkcfRmpIMa4=
+github.com/go-git/gcfg v1.5.0/go.mod h1:5m20vg6GwYabIxaOonVkTdrILxQMpEShl1xiMF4ua+E=
 github.com/go-git/go-billy/v5 v5.4.1 h1:Uwp5tDRkPr+l/TnbHOQzp+tmJfLceOlbVucgpTz8ix4=
+github.com/go-git/go-billy/v5 v5.4.1/go.mod h1:vjbugF6Fz7JIflbVpl1hJsGjSHNltrSw45YK/ukIvQg=
 github.com/go-git/go-git/v5 v5.6.1 h1:q4ZRqQl4pR/ZJHc1L5CFjGA1a10u76aV1iC+nh+bHsk=
+github.com/go-git/go-git/v5 v5.6.1/go.mod h1:mvyoL6Unz0PiTQrGQfSfiLFhBH1c1e84ylC2MDs4ee8=
 github.com/go-test/deep v1.0.3 h1:ZrJSEWsXzPOxaZnFteGEfooLba+ju3FYIbOrS+rQd68=
+github.com/go-test/deep v1.0.3/go.mod h1:wGDj63lr65AM2AQyKZd/NYHGb0R+1RLqB8NKt3aSFNA=
 github.com/golang/protobuf v1.1.0/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.3.1/go.mod h1:6lQm79b+lXiMfvg/cZm0SGofjICqVBUtrP5yJMmIC1U=
 github.com/golang/protobuf v1.5.0/go.mod h1:FsONVRAS9T7sI+LIUmWTfcYkHO4aIWwzhcaSAoJOfIk=
@@ -112,15 +120,22 @@ github.com/imdario/mergo v0.3.11/go.mod h1:jmQim1M+e3UYxmgPu/WyfjB3N3VflVyUjjjwH
 github.com/imdario/mergo v0.3.13 h1:lFzP57bqS/wsqKssCGmtLAb8A0wKjLGrve2q3PPVcBk=
 github.com/imdario/mergo v0.3.13/go.mod h1:4lJ1jqUDcsbIECGy0RUJAXNIhg+6ocWgb1ALK2O4oXg=
 github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 h1:BQSFePA1RWJOlocH6Fxy8MmwDt+yVQYULKfN0RoTN8A=
+github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99/go.mod h1:1lJo3i6rXxKeerYnT8Nvf0QmHCRC1n8sfWVwXF2Frvo=
 github.com/jhump/protoreflect v1.6.0 h1:h5jfMVslIg6l29nsMs0D8Wj17RDVdNYti0vDN/PZZoE=
+github.com/jhump/protoreflect v1.6.0/go.mod h1:eaTn3RZAmMBcV0fifFvlm6VHNz3wSkYyXYWUh7ymB74=
 github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
+github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
 github.com/kevinburke/ssh_config v1.2.0 h1:x584FjTGwHzMwvHx18PXxbBVzfnxogHaAReU4gf13a4=
+github.com/kevinburke/ssh_config v1.2.0/go.mod h1:CT57kijsi8u/K/BOFA39wgDQJ9CxiF4nAY/ojJ6r6mM=
 github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
 github.com/kr/pretty v0.3.0 h1:WgNl7dwNpEZ6jJ9k1snq4pZsg7DOEN8hP9Xw0Tsjwk0=
+github.com/kr/pretty v0.3.0/go.mod h1:640gp4NfQd8pI5XOwp5fnNeVWj67G7CFk/SaSQn7NBk=
 github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
 github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
+github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
 github.com/kylelemons/godebug v1.1.0 h1:RPNrshWIDI6G2gRW9EHilWtl7Z6Sb1BR0xunSBf0SNc=
+github.com/kylelemons/godebug v1.1.0/go.mod h1:9/0rRGxNHcop5bhtWyNeEfOS8JIWk580+fNqagV/RAw=
 github.com/mattn/go-colorable v0.0.9/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaOChaDxuIBZU=
 github.com/mattn/go-colorable v0.1.9/go.mod h1:u6P/XSegPjTcexA+o6vUJrdnUu04hMope9wVRipJSqc=
 github.com/mattn/go-colorable v0.1.12/go.mod h1:u5H1YNBxpqRaxsYJYSkiCWKzEfiAb1Gb520KVy5xxl4=
@@ -148,19 +163,23 @@ github.com/mitchellh/reflectwalk v1.0.2/go.mod h1:mSTlrgnPZtwu0c4WaC2kGObEpuNDbx
 github.com/oklog/run v1.1.0 h1:GEenZ1cK0+q0+wsJew9qUg/DyD8k3JzYsZAi5gYi2mA=
 github.com/oklog/run v1.1.0/go.mod h1:sVPdnTZT1zYwAJeCMu2Th4T21pA3FPOQRfWjQlk7DVU=
 github.com/pjbgf/sha1cd v0.3.0 h1:4D5XXmUUBUl/xQ6IjCkEAbqXskkq/4O7LmGn0AqMDs4=
+github.com/pjbgf/sha1cd v0.3.0/go.mod h1:nZ1rrWOcGJ5uZgEEVL1VUM9iRQiZvWdbZjkKyFzPPsI=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/posener/complete v1.1.1/go.mod h1:em0nMJCgc9GFtwrmVmEMR/ZL6WyhyjMBndrE9hABlRI=
 github.com/posener/complete v1.2.3 h1:NP0eAhjcjImqslEwo/1hq7gpajME0fTLTezBKDqfXqo=
 github.com/posener/complete v1.2.3/go.mod h1:WZIdtGGp+qx0sLrYKtIRAruyNpv6hFCicSgv7Sy7s/s=
 github.com/rogpeppe/go-internal v1.6.1 h1:/FiVV8dS/e+YqF2JvO3yXRFbBLTIuSDkuC7aBOAvL+k=
+github.com/rogpeppe/go-internal v1.6.1/go.mod h1:xXDCJY+GAPziupqXw64V24skbSoqbTEfhy4qGm1nDQc=
 github.com/russross/blackfriday v1.6.0 h1:KqfZb0pUVN2lYqZUYRddxF4OR8ZMURnJIG5Y3VRLtww=
 github.com/russross/blackfriday v1.6.0/go.mod h1:ti0ldHuxg49ri4ksnFxlkCfN+hvslNlmVHqNRXXJNAY=
 github.com/sergi/go-diff v1.2.0 h1:XU+rvMAioB0UC3q1MFrIQy4Vo5/4VsRDQQXHsEya6xQ=
+github.com/sergi/go-diff v1.2.0/go.mod h1:STckp+ISIX8hZLjrqAeVduY0gWCT9IjLuqbuNXdaHfM=
 github.com/shopspring/decimal v1.2.0/go.mod h1:DKyhrW/HYNuLGql+MJL6WCR6knT2jwCFRcu2hWCYk4o=
 github.com/shopspring/decimal v1.3.1 h1:2Usl1nmF/WZucqkFZhnfFYxxxu8LG21F6nPQBE5gKV8=
 github.com/shopspring/decimal v1.3.1/go.mod h1:DKyhrW/HYNuLGql+MJL6WCR6knT2jwCFRcu2hWCYk4o=
 github.com/skeema/knownhosts v1.1.0 h1:Wvr9V0MxhjRbl3f9nMnKnFfiWTJmtECJ9Njkea3ysW0=
+github.com/skeema/knownhosts v1.1.0/go.mod h1:sKFq3RD6/TKZkSWn8boUbDC7Qkgcv+8XXijpFO6roag=
 github.com/spf13/cast v1.3.1/go.mod h1:Qx5cxh0v+4UWYiBimWS+eyWzqEqokIECu5etghLkUJE=
 github.com/spf13/cast v1.5.0 h1:rj3WzYc11XZaIZMPKmwP96zkFEnnAmV8s6XbB2aY32w=
 github.com/spf13/cast v1.5.0/go.mod h1:SpXXQ5YoyJw6s3/6cMTQuxvgRl3PCJiyaX9p6b155UU=
@@ -181,6 +200,7 @@ github.com/vmihailenco/msgpack/v5 v5.3.5/go.mod h1:7xyJ9e+0+9SaZT0Wt1RGleJXzli6Q
 github.com/vmihailenco/tagparser/v2 v2.0.0 h1:y09buUbR+b5aycVFQs/g70pqKVZNBmxwAhO7/IwNM9g=
 github.com/vmihailenco/tagparser/v2 v2.0.0/go.mod h1:Wri+At7QHww0WTrCBeu4J6bNtoV6mEfg5OIWRZA9qds=
 github.com/xanzy/ssh-agent v0.3.3 h1:+/15pJfg/RsTxqYcX6fHqOXZwwMP+2VyYWJeWM2qQFM=
+github.com/xanzy/ssh-agent v0.3.3/go.mod h1:6dzNDKs0J9rVPHPhaGCukekBHKqfl+L3KghI1Bc68Uw=
 github.com/zclconf/go-cty v1.13.2 h1:4GvrUxe/QUDYuJKAav4EYqdM47/kZa672LwmXFmEKT0=
 github.com/zclconf/go-cty v1.13.2/go.mod h1:YKQzy/7pZ7iq2jNFzy5go57xdxdWoLLpaEp4u238AE0=
 golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
@@ -242,6 +262,7 @@ gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8
 gopkg.in/dnaeon/go-vcr.v3 v3.1.2 h1:F1smfXBqQqwpVifDfUBQG6zzaGjzT+EnVZakrOdr5wA=
 gopkg.in/dnaeon/go-vcr.v3 v3.1.2/go.mod h1:2IMOnnlx9I6u9x+YBsM3tAMx6AlOxnJ0pWxQAzZ79Ag=
 gopkg.in/warnings.v0 v0.1.2 h1:wFXVbFY8DY5/xOe1ECiWdKCzZlxgshcYVNkBHstARME=
+gopkg.in/warnings.v0 v0.1.2/go.mod h1:jksf8JmL6Qr/oQM2OXTHunEvvTAsrWBLb6OOjuVWRNI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

internal/auth0/resourceserver/data_source_test.go

@@ -162,7 +162,10 @@ func TestAccDataSourceResourceServer(t *testing.T) {
 					resource.TestCheckResourceAttr("data.auth0_resource_server.auth0", "allow_offline_access", "false"),
 					resource.TestCheckResourceAttr("data.auth0_resource_server.auth0", "signing_alg", "RS256"),
 					resource.TestCheckResourceAttr("data.auth0_resource_server.auth0", "token_lifetime_for_web", "7200"),
-					resource.TestCheckResourceAttr("data.auth0_resource_server.auth0", "scopes.#", "140"),
+					resource.TestCheckTypeSetElemNestedAttrs("data.auth0_resource_server.auth0", "scopes.*", map[string]string{
+						"name":        "read:users",
+						"description": "Read Users",
+					}), // Checking just one to ensure that scopes are not empty, as they get expanded periodically.
 					resource.TestCheckResourceAttr("data.auth0_resource_server.auth0", "verification_location", ""),
 					resource.TestCheckResourceAttr("data.auth0_resource_server.auth0", "enforce_policies", "false"),
 					resource.TestCheckResourceAttr("data.auth0_resource_server.auth0", "token_dialect", ""),

internal/config/client_retry_test.go

@@ -0,0 +1,175 @@
+package config
+
+import (
+	"crypto/tls"
+	"crypto/x509"
+	"errors"
+	"net/http"
+	"net/http/httptest"
+	"net/url"
+	"strconv"
+	"testing"
+	"time"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestCustomClientWithRetries(t *testing.T) {
+	t.Run("it retries on rate limit error", func(t *testing.T) {
+		apiCalls := 0
+		fail := true
+		testServer := httptest.NewServer(http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
+			apiCalls++
+
+			if fail {
+				fail = false
+				writer.WriteHeader(429)
+				resetAt := time.Now().Add(time.Second).Unix()
+				writer.Header().Set("X-RateLimit-Reset", strconv.Itoa(int(resetAt)))
+				return
+			}
+
+			writer.WriteHeader(200)
+		}))
+
+		client := customClientWithRetries()
+
+		request, err := http.NewRequest(http.MethodGet, testServer.URL, nil)
+		require.NoError(t, err)
+
+		response, err := client.Do(request)
+		require.NoError(t, err)
+
+		assert.Equal(t, 200, response.StatusCode)
+		assert.False(t, fail)
+		assert.Equal(t, 2, apiCalls)
+
+		t.Cleanup(func() {
+			testServer.Close()
+			err := response.Body.Close()
+			require.NoError(t, err)
+		})
+	})
+
+	t.Run("it retries on server error", func(t *testing.T) {
+		apiCalls := 0
+		fail := true
+		testServer := httptest.NewServer(http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
+			apiCalls++
+
+			if fail {
+				fail = false
+				writer.WriteHeader(500)
+				return
+			}
+
+			writer.WriteHeader(200)
+		}))
+
+		client := customClientWithRetries()
+
+		request, err := http.NewRequest(http.MethodGet, testServer.URL, nil)
+		require.NoError(t, err)
+
+		response, err := client.Do(request)
+		require.NoError(t, err)
+
+		assert.Equal(t, 200, response.StatusCode)
+		assert.False(t, fail)
+		assert.Equal(t, 2, apiCalls)
+
+		t.Cleanup(func() {
+			testServer.Close()
+			err := response.Body.Close()
+			require.NoError(t, err)
+		})
+	})
+
+	t.Run("it does not retry more than 3 times on server error", func(t *testing.T) {
+		apiCalls := 0
+		testServer := httptest.NewServer(http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
+			apiCalls++
+			writer.WriteHeader(500)
+		}))
+
+		client := customClientWithRetries()
+
+		request, err := http.NewRequest(http.MethodGet, testServer.URL, nil)
+		require.NoError(t, err)
+
+		response, err := client.Do(request)
+		require.NoError(t, err)
+
+		assert.Equal(t, 500, response.StatusCode)
+		assert.Equal(t, 3+1, apiCalls) // 3 retries + 1 first call.
+
+		t.Cleanup(func() {
+			testServer.Close()
+			err := response.Body.Close()
+			require.NoError(t, err)
+		})
+	})
+}
+
+func TestRetryableErrorRetryFunc(t *testing.T) {
+	testCases := []struct {
+		name     string
+		err      error
+		expected bool
+	}{
+		{
+			name:     "NilError",
+			err:      nil,
+			expected: false,
+		},
+		{
+			name: "TooManyRedirectsError",
+			err: &url.Error{
+				Op:  "Get",
+				URL: "http://example.com",
+				Err: errors.New("stopped after 5 redirects"),
+			},
+			expected: false,
+		},
+		{
+			name: "UnsupportedProtocolSchemeError",
+			err: &url.Error{
+				Op:  "Get",
+				URL: "ftp://example.com",
+				Err: errors.New("unsupported protocol scheme"),
+			},
+			expected: false,
+		},
+		{
+			name: "CertificateVerificationError",
+			err: &url.Error{
+				Op:  "Get",
+				URL: "https://example.com",
+				Err: &tls.CertificateVerificationError{},
+			},
+			expected: false,
+		},
+		{
+			name: "UnknownAuthorityError",
+			err: &url.Error{
+				Op:  "Get",
+				URL: "https://example.com",
+				Err: x509.UnknownAuthorityError{},
+			},
+			expected: false,
+		},
+		{
+			name:     "OtherError",
+			err:      errors.New("some other error"),
+			expected: true,
+		},
+	}
+
+	for _, testCase := range testCases {
+		t.Run(testCase.name, func(t *testing.T) {
+			actual := retryableErrorRetryFunc(testCase.err)
+			assert.Equal(t, testCase.expected, actual)
+		})
+	}
+}