feat: added support for application/json content type in request body (#239)

* feat: added support for application/json content type in request body

* docs: updated README.md with feature update

* chore: corrected version

* chore: corrected model names

* chore: added messaging bulk example (#243)

* chore: added messaging bulk example

* chore: added messaging bulk example

* chore: added messaging bulk example

* chore: corrected message

Author: tiwarishubham635

Diff for: README.md

@@ -3,13 +3,17 @@
 [![Tests](https://github.com/twilio/twilio-go/actions/workflows/test-and-deploy.yml/badge.svg)](https://github.com/twilio/twilio-go/actions/workflows/test-and-deploy.yml)
 [![PkgGoDev](https://pkg.go.dev/badge/github.com/twilio/twilio-go)](https://pkg.go.dev/github.com/twilio/twilio-go)
 [![Release](https://img.shields.io/github/release/twilio/twilio-go.svg)](https://github.com/twilio/twilio-go/releases/latest)
-[![Learn OSS Contribution in TwilioQuest](https://img.shields.io/static/v1?label=TwilioQuest&message=Learn%20to%20contribute%21&color=F22F46&labelColor=1f243c&style=flat-square&logo=data:image/png;base64,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)](https://twil.io/learn-open-source)
 
 All the code [here](./rest) was generated by [twilio-oai-generator](https://github.com/twilio/twilio-oai-generator) by
 leveraging [openapi-generator](https://github.com/OpenAPITools/openapi-generator)
 and [twilio-oai](https://github.com/twilio/twilio-oai). If you find an issue with the generation or the OpenAPI specs,
 please go ahead and open an issue or a PR against the relevant repositories.
 
+## 🚀 Feature Update
+Twilio Go Helper Library's version 1.20.0 adds support for the application/json content type in the request body. See example [here](#messaging-bulk).
+Behind the scenes Go Helper is now auto-generated via OpenAPI with this release.
+This enables us to rapidly add new features and enhance consistency across versions and languages.
+
 ## Documentation
 
 The documentation for the Twilio API can be found [here][apidocs].
@@ -297,6 +301,48 @@ func main() {
 }
 ```
 
+### Send Bulk Message <a id="messaging-bulk"></a>
+
+Try sending a message to multiple recipients with JSON request body support.
+
+```go
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"github.com/twilio/twilio-go"
+	previewMessaging "github.com/twilio/twilio-go/rest/preview_messaging/v1"
+)
+
+func main() {
+	accountSid := "ACXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX"
+	authToken := "f2xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
+
+	client := twilio.NewRestClientWithParams(twilio.ClientParams{
+		Username: accountSid,
+		Password: authToken,
+	})
+
+	// create multiple recipients
+	msg1 := previewMessaging.MessagingV1Message{To: "+XXXXXXXXXX"}
+	msg2 := previewMessaging.MessagingV1Message{To: "+XXXXXXXXXX"}
+	
+	// create message request object
+	req := &previewMessaging.CreateMessagesRequest{Messages: []previewMessaging.MessagingV1Message{msg1, msg2}, Body: "Hello from Go!", From: "+XXXXXXXXXX"}
+	params := &previewMessaging.CreateMessagesParams{CreateMessagesRequest: req}
+
+	resp, err := client.PreviewMessagingV1.CreateMessages(params)
+	if err != nil {
+		fmt.Println("Error sending SMS message: " + err.Error())
+	} else {
+		response, _ := json.Marshal(*resp)
+		fmt.Println("Response: " + string(response))
+	}
+}
+```
+
 ### Iterate through records
 
 This library also offers paging functionality. Collections such as calls and messages have `ListXxx` and `StreamXxx`

Diff for: client/base_client.go

@@ -10,5 +10,5 @@ type BaseClient interface {
 	AccountSid() string
 	SetTimeout(timeout time.Duration)
 	SendRequest(method string, rawURL string, data url.Values,
-		headers map[string]interface{}) (*http.Response, error)
+		headers map[string]interface{}, body ...byte) (*http.Response, error)
 }

Diff for: client/client.go

@@ -2,6 +2,7 @@
 package client
 
 import (
+	"bytes"
 	"encoding/json"
 	"fmt"
 	"net/http"
@@ -64,10 +65,20 @@ func (c *Client) SetTimeout(timeout time.Duration) {
 	c.HTTPClient.Timeout = timeout
 }
 
+func extractContentTypeHeader(headers map[string]interface{}) (cType string) {
+	headerType, ok := headers["Content-Type"]
+	if !ok {
+		return urlEncodedContentType
+	}
+	return headerType.(string)
+}
+
 const (
-	keepZeros = true
-	delimiter = '.'
-	escapee   = '\\'
+	urlEncodedContentType = "application/x-www-form-urlencoded"
+	jsonContentType       = "application/json"
+	keepZeros             = true
+	delimiter             = '.'
+	escapee               = '\\'
 )
 
 func (c *Client) doWithErr(req *http.Request) (*http.Response, error) {
@@ -117,16 +128,24 @@ func (c *Client) validateCredentials() error {
 
 // SendRequest verifies, constructs, and authorizes an HTTP request.
 func (c *Client) SendRequest(method string, rawURL string, data url.Values,
-	headers map[string]interface{}) (*http.Response, error) {
+	headers map[string]interface{}, body ...byte) (*http.Response, error) {
+
+	contentType := extractContentTypeHeader(headers)
+
 	u, err := url.Parse(rawURL)
 	if err != nil {
 		return nil, err
 	}
 
 	valueReader := &strings.Reader{}
 	goVersion := runtime.Version()
+	var req *http.Request
 
-	if method == http.MethodGet {
+	//For HTTP GET Method there are no body parameters. All other parameters like query, path etc
+	// are added as information in the url itself. Also while Content-Type is json, we are sending
+	// json body. In that case, data variable conatins all other parameters than body, which is the
+	//same case as GET method. In that case as well all parameters will be added to url
+	if method == http.MethodGet || contentType == jsonContentType {
 		if data != nil {
 			v, _ := form.EncodeToStringWith(data, delimiter, escapee, keepZeros)
 			s := delimitingRegex.ReplaceAllString(v, "")
@@ -135,18 +154,32 @@ func (c *Client) SendRequest(method string, rawURL string, data url.Values,
 		}
 	}
 
-	if method == http.MethodPost {
-		valueReader = strings.NewReader(data.Encode())
-	}
+	//data is already processed and information will be added to u(the url) in the
+	//previous step. Now body will solely contain json payload
+	if contentType == jsonContentType {
+		req, err = http.NewRequest(method, u.String(), bytes.NewBuffer(body))
+		if err != nil {
+			return nil, err
+		}
+	} else {
+		//Here the HTTP POST methods which is not having json content type are processed
+		//All the values will be added in data and encoded (all body, query, path parameters)
+		if method == http.MethodPost {
+			valueReader = strings.NewReader(data.Encode())
+		}
+		credErr := c.validateCredentials()
+		if credErr != nil {
+			return nil, credErr
+		}
+		req, err = http.NewRequest(method, u.String(), valueReader)
+		if err != nil {
+			return nil, err
+		}
 
-	credErr := c.validateCredentials()
-	if credErr != nil {
-		return nil, credErr
 	}
 
-	req, err := http.NewRequest(method, u.String(), valueReader)
-	if err != nil {
-		return nil, err
+	if contentType == urlEncodedContentType {
+		req.Header.Add("Content-Type", urlEncodedContentType)
 	}
 
 	req.SetBasicAuth(c.basicAuth())
@@ -160,14 +193,9 @@ func (c *Client) SendRequest(method string, rawURL string, data url.Values,
 
 	req.Header.Add("User-Agent", userAgent)
 
-	if method == http.MethodPost {
-		req.Header.Add("Content-Type", "application/x-www-form-urlencoded")
-	}
-
 	for k, v := range headers {
 		req.Header.Add(k, fmt.Sprint(v))
 	}
-
 	return c.doWithErr(req)
 }
 

Diff for: client/client_test.go

@@ -294,7 +294,7 @@ func TestClient_SetAccountSid(t *testing.T) {
 func TestClient_DefaultUserAgentHeaders(t *testing.T) {
 	headerServer := httptest.NewServer(http.HandlerFunc(
 		func(writer http.ResponseWriter, request *http.Request) {
-			assert.Regexp(t, regexp.MustCompile(`^twilio-go/[0-9.]+\s\(\w+\s\w+\)\sgo/\S+$`), request.Header.Get("User-Agent"))
+			assert.Regexp(t, regexp.MustCompile(`^twilio-go/[0-9.]+(-rc.[0-9])*\s\(\w+\s\w+\)\sgo/\S+$`), request.Header.Get("User-Agent"))
 		}))
 
 	resp, _ := testClient.SendRequest("GET", headerServer.URL, nil, nil)

Diff for: client/request_handler.go

@@ -23,13 +23,12 @@ func NewRequestHandler(client BaseClient) *RequestHandler {
 }
 
 func (c *RequestHandler) sendRequest(method string, rawURL string, data url.Values,
-	headers map[string]interface{}) (*http.Response, error) {
+	headers map[string]interface{}, body ...byte) (*http.Response, error) {
 	parsedURL, err := c.BuildUrl(rawURL)
 	if err != nil {
 		return nil, err
 	}
-
-	return c.Client.SendRequest(method, parsedURL, data, headers)
+	return c.Client.SendRequest(method, parsedURL, data, headers, body...)
 }
 
 // BuildUrl builds the target host string taking into account region and edge configurations.
@@ -83,8 +82,8 @@ func (c *RequestHandler) BuildUrl(rawURL string) (string, error) {
 	return u.String(), nil
 }
 
-func (c *RequestHandler) Post(path string, bodyData url.Values, headers map[string]interface{}) (*http.Response, error) {
-	return c.sendRequest(http.MethodPost, path, bodyData, headers)
+func (c *RequestHandler) Post(path string, bodyData url.Values, headers map[string]interface{}, body ...byte) (*http.Response, error) {
+	return c.sendRequest(http.MethodPost, path, bodyData, headers, body...)
 }
 
 func (c *RequestHandler) Get(path string, queryData url.Values, headers map[string]interface{}) (*http.Response, error) {

Diff for: client/request_handler_test.go

@@ -2,6 +2,8 @@ package client_test
 
 import (
 	"errors"
+	"net/http"
+	"net/http/httptest"
 	"net/url"
 	"testing"
 
@@ -65,3 +67,53 @@ func assertAndGetURL(t *testing.T, requestHandler *client.RequestHandler, rawURL
 	assert.Nil(t, err)
 	return parsedURL
 }
+
+func TestRequestHandler_SendGetRequest(t *testing.T) {
+	errorResponse := `{
+	"status": 400,
+	"code":20001,
+	"message":"Bad request",
+	"more_info":"https://www.twilio.com/docs/errors/20001"
+}`
+	errorServer := httptest.NewServer(http.HandlerFunc(
+		func(resp http.ResponseWriter, req *http.Request) {
+			resp.WriteHeader(400)
+			_, _ = resp.Write([]byte(errorResponse))
+		}))
+	defer errorServer.Close()
+
+	requestHandler := NewRequestHandler("user", "pass")
+	resp, err := requestHandler.Get(errorServer.URL, nil, nil) //nolint:bodyclose
+	twilioError := err.(*client.TwilioRestError)
+	assert.Nil(t, resp)
+	assert.Equal(t, 400, twilioError.Status)
+	assert.Equal(t, 20001, twilioError.Code)
+	assert.Equal(t, "https://www.twilio.com/docs/errors/20001", twilioError.MoreInfo)
+	assert.Equal(t, "Bad request", twilioError.Message)
+	assert.Nil(t, twilioError.Details)
+}
+
+func TestRequestHandler_SendPostRequest(t *testing.T) {
+	errorResponse := `{
+	"status": 400,
+	"code":20001,
+	"message":"Bad request",
+	"more_info":"https://www.twilio.com/docs/errors/20001"
+}`
+	errorServer := httptest.NewServer(http.HandlerFunc(
+		func(resp http.ResponseWriter, req *http.Request) {
+			resp.WriteHeader(400)
+			_, _ = resp.Write([]byte(errorResponse))
+		}))
+	defer errorServer.Close()
+
+	requestHandler := NewRequestHandler("user", "pass")
+	resp, err := requestHandler.Post(errorServer.URL, nil, nil) //nolint:bodyclose
+	twilioError := err.(*client.TwilioRestError)
+	assert.Nil(t, resp)
+	assert.Equal(t, 400, twilioError.Status)
+	assert.Equal(t, 20001, twilioError.Code)
+	assert.Equal(t, "https://www.twilio.com/docs/errors/20001", twilioError.MoreInfo)
+	assert.Equal(t, "Bad request", twilioError.Message)
+	assert.Nil(t, twilioError.Details)
+}

Diff for: rest/accounts/v1/README.md

@@ -5,7 +5,7 @@ This is the public Twilio REST API.
 ## Overview
 This API client was generated by the [OpenAPI Generator](https://openapi-generator.tech) project from the OpenAPI specs located at [twilio/twilio-oai](https://github.com/twilio/twilio-oai/tree/main/spec).  By using the [OpenAPI-spec](https://www.openapis.org/) from a remote server, you can easily generate an API client.
 
-- API version: 1.55.3
+- API version: 1.0.0
 - Package version: 1.0.0
 - Build package: com.twilio.oai.TwilioGoGenerator
 For more information, please visit [https://support.twilio.com](https://support.twilio.com)

Diff for: rest/accounts/v1/docs/ListCredentialAwsResponseMeta.md

@@ -5,12 +5,12 @@
 Name | Type | Description | Notes
 ------------ | ------------- | ------------- | -------------
 **FirstPageUrl** | **string** |  |[optional] 
+**Key** | **string** |  |[optional] 
 **NextPageUrl** | Pointer to **string** |  |
 **Page** | **int** |  |[optional] 
 **PageSize** | **int** |  |[optional] 
 **PreviousPageUrl** | Pointer to **string** |  |
 **Url** | **string** |  |[optional] 
-**Key** | **string** |  |[optional] 
 
 [[Back to Model list]](../README.md#documentation-for-models) [[Back to API list]](../README.md#documentation-for-api-endpoints) [[Back to README]](../README.md)
 

Diff for: rest/accounts/v1/model_list_credential_aws_response_meta.go

@@ -17,10 +17,10 @@ package openapi
 // ListCredentialAwsResponseMeta struct for ListCredentialAwsResponseMeta
 type ListCredentialAwsResponseMeta struct {
 	FirstPageUrl    string  `json:"first_page_url,omitempty"`
+	Key             string  `json:"key,omitempty"`
 	NextPageUrl     *string `json:"next_page_url,omitempty"`
 	Page            int     `json:"page,omitempty"`
 	PageSize        int     `json:"page_size,omitempty"`
 	PreviousPageUrl *string `json:"previous_page_url,omitempty"`
 	Url             string  `json:"url,omitempty"`
-	Key             string  `json:"key,omitempty"`
 }