Clarified how to set EU region

CHANGELOG

@@ -4,7 +4,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [3.6.1-rc.1] - 2019-06-26
+## [3.6.1-rc.3] - 2019-07-16
+### Added
+* APIBaseEU and APIBaseUS to help customers change regions
+* Documented how to change regions in the README
+
+## [3.6.1-rc.2] - 2019-07-01
 ### Changes
 * Fix the JSON response for `GetMember()`
 * Typo in format string in max number of tags error

README.md

@@ -260,6 +260,13 @@ The official mailgun documentation includes examples using this library. Go
 [here](https://documentation.mailgun.com/en/latest/api_reference.html#api-reference)
 and click on the "Go" button at the top of the page.
 
+### EU Region
+European customers will need to change the default API Base to access your domains
+
+```go
+mg := mailgun.NewMailgun("your-domain.com", "private-api-key")
+mg.SetAPIBase(mailgun.APIBaseEU)
+```
 ## Installation
 
 If you are using [golang modules](https://github.com/golang/go/wiki/Modules) make sure you

httphelpers.go

@@ -13,9 +13,12 @@ import (
 	"net/url"
 	"os"
 	"path"
+	"regexp"
 	"strings"
 )
 
+var validURL = regexp.MustCompile(`^/v[2-4].*`)
+
 type httpRequest struct {
 	URL               string
 	Parameters        map[string][]string
@@ -291,6 +294,11 @@ func (r *httpRequest) generateUrlWithParameters() (string, error) {
 	if err != nil {
 		return "", err
 	}
+
+	if !validURL.MatchString(url.Path) {
+		return "", errors.New(`BaseAPI must end with a /v2, /v3 or /v4; setBaseAPI("https://host/v3")`)
+	}
+
 	q := url.Query()
 	if r.Parameters != nil && len(r.Parameters) > 0 {
 		for name, values := range r.Parameters {

mailgun.go

@@ -91,6 +91,8 @@ var Debug = false
 const (
 	// Base Url the library uses to contact mailgun. Use SetAPIBase() to override
 	APIBase              = "https://api.mailgun.net/v3"
+	APIBaseUS            = APIBase
+	APIBaseEU            = "https://api.eu.mailgun.net/v3"
 	messagesEndpoint     = "messages"
 	mimeMessagesEndpoint = "messages.mime"
 	bouncesEndpoint      = "bounces"
@@ -299,6 +301,14 @@ func (mg *MailgunImpl) SetClient(c *http.Client) {
 }
 
 // SetAPIBase updates the API Base URL for this client.
+//  // For EU Customers
+//  mg.SetAPIBase(mailgun.APIBaseEU)
+//
+//  // For US Customers
+//  mg.SetAPIBase(mailgun.APIBaseUS)
+//
+//  // Set a custom base API
+//  mg.SetAPIBase("https://localhost/v3")
 func (mg *MailgunImpl) SetAPIBase(address string) {
 	mg.apiBase = address
 }

mailgun_test.go

@@ -1,17 +1,19 @@
-package mailgun
+package mailgun_test
 
 import (
+	"context"
 	"net/http"
 	"testing"
 
 	"github.com/facebookgo/ensure"
+	"github.com/mailgun/mailgun-go/v3"
 )
 
 const domain = "valid-mailgun-domain"
 const apiKey = "valid-mailgun-api-key"
 
 func TestMailgun(t *testing.T) {
-	m := NewMailgun(domain, apiKey)
+	m := mailgun.NewMailgun(domain, apiKey)
 
 	ensure.DeepEqual(t, m.Domain(), domain)
 	ensure.DeepEqual(t, m.APIKey(), apiKey)
@@ -21,3 +23,13 @@ func TestMailgun(t *testing.T) {
 	m.SetClient(client)
 	ensure.DeepEqual(t, client, m.Client())
 }
+
+func TestInvalidBaseAPI(t *testing.T) {
+	mg := mailgun.NewMailgun(testDomain, testKey)
+	mg.SetAPIBase("https://localhost")
+
+	ctx := context.Background()
+	_, err := mg.GetDomain(ctx, "unknown.domain")
+	ensure.NotNil(t, err)
+	ensure.DeepEqual(t, err.Error(), `BaseAPI must end with a /v2, /v3 or /v4; setBaseAPI("https://host/v3")`)
+}

messages_test.go

@@ -220,7 +220,7 @@ func TestSendMGOffline(t *testing.T) {
 	)
 	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
 		ensure.DeepEqual(t, req.Method, http.MethodPost)
-		ensure.DeepEqual(t, req.URL.Path, fmt.Sprintf("/%s/messages", exampleDomain))
+		ensure.DeepEqual(t, req.URL.Path, fmt.Sprintf("/v3/%s/messages", exampleDomain))
 		ensure.DeepEqual(t, req.FormValue("from"), fromUser)
 		ensure.DeepEqual(t, req.FormValue("subject"), exampleSubject)
 		ensure.DeepEqual(t, req.FormValue("text"), exampleText)
@@ -231,7 +231,7 @@ func TestSendMGOffline(t *testing.T) {
 	defer srv.Close()
 
 	mg := NewMailgun(exampleDomain, exampleAPIKey)
-	mg.SetAPIBase(srv.URL)
+	mg.SetAPIBase(srv.URL + "/v3")
 	ctx := context.Background()
 
 	m := mg.NewMessage(fromUser, exampleSubject, exampleText, toUser)
@@ -253,7 +253,7 @@ func TestSendMGSeparateDomain(t *testing.T) {
 	)
 	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
 		ensure.DeepEqual(t, req.Method, http.MethodPost)
-		ensure.DeepEqual(t, req.URL.Path, fmt.Sprintf("/%s/messages", signingDomain))
+		ensure.DeepEqual(t, req.URL.Path, fmt.Sprintf("/v3/%s/messages", signingDomain))
 		ensure.DeepEqual(t, req.FormValue("from"), fromUser)
 		ensure.DeepEqual(t, req.FormValue("subject"), exampleSubject)
 		ensure.DeepEqual(t, req.FormValue("text"), exampleText)
@@ -264,7 +264,7 @@ func TestSendMGSeparateDomain(t *testing.T) {
 	defer srv.Close()
 
 	mg := NewMailgun(exampleDomain, exampleAPIKey)
-	mg.SetAPIBase(srv.URL)
+	mg.SetAPIBase(srv.URL + "/v3")
 
 	ctx := context.Background()
 	m := mg.NewMessage(fromUser, exampleSubject, exampleText, toUser)
@@ -295,7 +295,7 @@ func TestSendMGMessageVariables(t *testing.T) {
 	)
 	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
 		ensure.DeepEqual(t, req.Method, http.MethodPost)
-		ensure.DeepEqual(t, req.URL.Path, fmt.Sprintf("/%s/messages", exampleDomain))
+		ensure.DeepEqual(t, req.URL.Path, fmt.Sprintf("/v3/%s/messages", exampleDomain))
 
 		ensure.DeepEqual(t, req.FormValue("from"), fromUser)
 		ensure.DeepEqual(t, req.FormValue("subject"), exampleSubject)
@@ -310,7 +310,7 @@ func TestSendMGMessageVariables(t *testing.T) {
 	defer srv.Close()
 
 	mg := NewMailgun(exampleDomain, exampleAPIKey)
-	mg.SetAPIBase(srv.URL)
+	mg.SetAPIBase(srv.URL + "/v3")
 
 	m := mg.NewMessage(fromUser, exampleSubject, exampleText, toUser)
 	m.AddVariable(exampleStrVarKey, exampleStrVarVal)
@@ -368,7 +368,7 @@ func TestSendEOFError(t *testing.T) {
 	defer srv.Close()
 
 	mg := NewMailgun(exampleDomain, exampleAPIKey)
-	mg.SetAPIBase(srv.URL)
+	mg.SetAPIBase(srv.URL + "/v3")
 
 	m := mg.NewMessage(fromUser, exampleSubject, exampleText, toUser)
 	_, _, err := mg.Send(context.Background(), m)
@@ -386,13 +386,13 @@ func TestHasRecipient(t *testing.T) {
 
 	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
 		ensure.DeepEqual(t, req.Method, http.MethodPost)
-		ensure.DeepEqual(t, req.URL.Path, fmt.Sprintf("/%s/messages", exampleDomain))
+		ensure.DeepEqual(t, req.URL.Path, fmt.Sprintf("/v3/%s/messages", exampleDomain))
 		fmt.Fprint(w, `{"message":"Queued, Thank you", "id":"<[email protected]>"}`)
 	}))
 	defer srv.Close()
 
 	mg := NewMailgun(exampleDomain, exampleAPIKey)
-	mg.SetAPIBase(srv.URL)
+	mg.SetAPIBase(srv.URL + "/v3")
 
 	// No recipient
 	m := mg.NewMessage(fromUser, exampleSubject, exampleText)
@@ -423,7 +423,7 @@ func TestResendStored(t *testing.T) {
 	)
 	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
 		ensure.DeepEqual(t, req.Method, http.MethodPost)
-		ensure.DeepEqual(t, req.URL.Path, "/some-url")
+		ensure.DeepEqual(t, req.URL.Path, "/v3/some-url")
 		ensure.DeepEqual(t, req.FormValue("to"), toUser)
 
 		rsp := fmt.Sprintf(`{"message":"%s", "id":"%s"}`, exampleMessage, exampleID)
@@ -432,13 +432,13 @@ func TestResendStored(t *testing.T) {
 	defer srv.Close()
 
 	mg := NewMailgun(exampleDomain, exampleAPIKey)
-	mg.SetAPIBase(srv.URL)
+	mg.SetAPIBase(srv.URL + "/v3")
 
-	msg, id, err := mg.ReSend(context.Background(), srv.URL+"/some-url")
+	msg, id, err := mg.ReSend(context.Background(), srv.URL+"/v3/some-url")
 	ensure.NotNil(t, err)
 	ensure.DeepEqual(t, err.Error(), "must provide at least one recipient")
 
-	msg, id, err = mg.ReSend(context.Background(), srv.URL+"/some-url", toUser)
+	msg, id, err = mg.ReSend(context.Background(), srv.URL+"/v3/some-url", toUser)
 	ensure.Nil(t, err)
 	ensure.DeepEqual(t, msg, exampleMessage)
 	ensure.DeepEqual(t, id, exampleID)
@@ -454,7 +454,7 @@ func TestSendTLSOptions(t *testing.T) {
 	)
 	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
 		ensure.DeepEqual(t, req.Method, http.MethodPost)
-		ensure.DeepEqual(t, req.URL.Path, fmt.Sprintf("/%s/messages", exampleDomain))
+		ensure.DeepEqual(t, req.URL.Path, fmt.Sprintf("/v3/%s/messages", exampleDomain))
 		ensure.DeepEqual(t, req.FormValue("from"), fromUser)
 		ensure.DeepEqual(t, req.FormValue("subject"), exampleSubject)
 		ensure.DeepEqual(t, req.FormValue("text"), exampleText)
@@ -467,7 +467,7 @@ func TestSendTLSOptions(t *testing.T) {
 	defer srv.Close()
 
 	mg := NewMailgun(exampleDomain, exampleAPIKey)
-	mg.SetAPIBase(srv.URL)
+	mg.SetAPIBase(srv.URL + "/v3")
 	ctx := context.Background()
 
 	m := mg.NewMessage(fromUser, exampleSubject, exampleText, toUser)
@@ -497,7 +497,7 @@ func TestSendTemplate(t *testing.T) {
 	defer srv.Close()
 
 	mg := NewMailgun(exampleDomain, exampleAPIKey)
-	mg.SetAPIBase(srv.URL)
+	mg.SetAPIBase(srv.URL + "/v3")
 	ctx := context.Background()
 
 	m := mg.NewMessage(fromUser, exampleSubject, "", toUser)