{"id":611,"date":"2022-05-27T15:28:48","date_gmt":"2022-05-27T15:28:48","guid":{"rendered":"https:\/\/andrejacobs.org\/?p=611"},"modified":"2022-05-27T15:28:53","modified_gmt":"2022-05-27T15:28:53","slug":"send-twitter-tweets-using-go","status":"publish","type":"post","link":"https:\/\/andrejacobs.org\/projects\/send-twitter-tweets-using-go\/","title":{"rendered":"Send Twitter tweets using Go"},"content":{"rendered":"\n<p class=\"has-small-font-size\">Featured image by\u00a0<a href=\"https:\/\/github.com\/egonelbre\/gophers\" target=\"_blank\" rel=\"noreferrer noopener\">Egon Elbre<\/a><\/p>\n\n\n\n<div class=\"wp-block-jetpack-markdown\"><p>Nothing beats learning like working on an actual project. To that degree I started working on my own command line application <a href=\"https:\/\/github.com\/andrejacobs\/ajtweet-cli\">ajtweet<\/a> to learn more about building CLI apps and Go in general.<\/p>\n<p>This post goes over the process of how I managed to use the Twitter v2 APIs from Postman as well as from a simple Go application. You can also check out the <a href=\"https:\/\/github.com\/andrejacobs\/example_twitter_golang\">example code here<\/a>.<\/p>\n<h2>Register to get access to Twitter APIs<\/h2>\n<ul>\n<li>You need to have a valid twitter user account and then use this <a href=\"https:\/\/developer.twitter.com\/en\/docs\/twitter-api\/getting-started\/getting-access-to-the-twitter-api\">guide for signing up<\/a>.<\/li>\n<li>You will need to create the <a href=\"https:\/\/developer.twitter.com\/en\/docs\/authentication\/oauth-1-0a\/api-key-and-secret\">API key and secret<\/a>,\u00a0<a href=\"https:\/\/developer.twitter.com\/en\/docs\/authentication\/oauth-1-0a\/obtaining-user-access-tokens\">user Access Token and Secret<\/a>,\u00a0<a href=\"https:\/\/developer.twitter.com\/en\/docs\/authentication\/oauth-2-0\/bearer-tokens\">App Access Token<\/a> in order to access the services. I will do this in the next section.<\/li>\n<\/ul>\n<h2>Creating new keys, secrets and tokens<\/h2>\n<ul>\n<li>Go to the Twitter developer <a href=\"https:\/\/developer.twitter.com\/en\/portal\/dashboard\">dashboard<\/a>.<\/li>\n<li>Create a new project. You will need to supply a name, the use case and a description for Twitter to understand what you are building.<\/li>\n<li>Next you will need to create an app. Once I created a project the dashboard took me to the App setup process.<\/li>\n<li>You will then be given the API Key, API Key Secret and a Bearer Token. Ensure you store these in your password manager.<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/andrejacobs.org\/wp-content\/uploads\/2022\/05\/twitter.png\" alt=\"\"><\/p>\n<ul>\n<li>Next you will also need to setup User authentication choosing either OAuth 2.0, OAuth 1.0a or both. Select the app and then the Settings tab. At the bottom there is a section to setup User authentication settings.<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/andrejacobs.org\/wp-content\/uploads\/2022\/05\/twitter1.png\" alt=\"\"><\/p>\n<ul>\n<li>For now I will just be setting up OAuth 1.0a with access to Read and Write tweets.<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/andrejacobs.org\/wp-content\/uploads\/2022\/05\/twitter2.png\" alt=\"\"><\/p>\n<ul>\n<li>Fill in the Callback URI and Website URL. Since I will only be using the app and tokens as myself, I just set the Callback URI to <a href=\"https:\/\/localhost\">https:\/\/localhost<\/a>.<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/andrejacobs.org\/wp-content\/uploads\/2022\/05\/twitter3.png\" alt=\"\"><\/p>\n<ul>\n<li>Save and select the Keys and tokens section of the App settings.<\/li>\n<li>Generate or Regenerate the Access token and Secret for your developer account. Note that it states \u201cRead and Write\u201d permissions. If you do not setup the OAuth 1.0 and or OAuth 2.0 settings for the application, then it will only generate Read only tokens.<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/andrejacobs.org\/wp-content\/uploads\/2022\/05\/twitter4.png\" alt=\"\"><\/p>\n<h2>Making the first request<\/h2>\n<p>I will be following this <a href=\"https:\/\/developer.twitter.com\/en\/docs\/twitter-api\/getting-started\/make-your-first-request\">guide<\/a> on how to make the first request.<\/p>\n<p>The quickest test is to do a user lookup using curl from the terminal.<\/p>\n<pre><code class=\"language-bash\"># First do a fail test, e.g. not providing the credentials\n$ curl &quot;https:\/\/api.twitter.com\/2\/users\/by\/username\/andrejacobs42&quot; -H &quot;Authorization: Bearer $TW_ACCESS_TOKEN&quot;\n{\n  &quot;title&quot;: &quot;Unauthorized&quot;,\n  &quot;type&quot;: &quot;about:blank&quot;,\n  &quot;status&quot;: 401,\n  &quot;detail&quot;: &quot;Unauthorized&quot;\n}\n\n# Next set the TW_ACCESS_TOKEN environment variable to the Bearer Token you received earlier\n$ export TW_ACCESS_TOKEN=My top secret token here\n$ curl &quot;https:\/\/api.twitter.com\/2\/users\/by\/username\/andrejacobs42&quot; -H &quot;Authorization: Bearer $TW_ACCESS_TOKEN&quot;\n{&quot;data&quot;:{&quot;id&quot;:&quot;69640510&quot;,&quot;name&quot;:&quot;Andr\u00e9 Jacobs&quot;,&quot;username&quot;:&quot;andrejacobs42&quot;}}\n\n# Try and lookup someone famous\n$ curl &quot;https:\/\/api.twitter.com\/2\/users\/by\/username\/elonmusk&quot; -H &quot;Authorization: Bearer $TW_ACCESS_TOKEN&quot;\n{&quot;data&quot;:{&quot;id&quot;:&quot;44196397&quot;,&quot;name&quot;:&quot;Elon Musk&quot;,&quot;username&quot;:&quot;elonmusk&quot;}}\n<\/code><\/pre>\n<ul>\n<li><strong>NOTE:<\/strong> The <a href=\"https:\/\/developer.twitter.com\/en\/docs\/authentication\/oauth-2-0\">Bearer token<\/a> is also referred to as the <code>App Access Token<\/code> and can be used in the APIs that support <code>OAuth 2.0 App-Only<\/code> (mentioned in the Twitter docs).<\/li>\n<\/ul>\n<h2>Posting a Tweet<\/h2>\n<p>First I will be setting up and using Postman to send a tweet followed by writing an app in Go to do the same thing.<\/p>\n<h3>Posting a Tweet using Postman<\/h3>\n<ul>\n<li>Download and install <a href=\"https:\/\/www.postman.com\/\">Postman<\/a>.<\/li>\n<li>I will be following this <a href=\"https:\/\/developer.twitter.com\/en\/docs\/tutorials\/postman-getting-started\">guide<\/a> from Twitter on how to setup and use Postman with Twitter\u2019s APIs. <strong>NOTE:<\/strong> My version of the Postman desktop app on Mac looks different than their documentation. So by the time you read it, it probably looks different again &#x1f611;<\/li>\n<li>Import the <a href=\"https:\/\/t.co\/twitter-api-postman\">Twitter API v2 collection<\/a> into Postman. Inside of the desktop app.\n<ul>\n<li>Search for \u201cTwitter\u201d in the top search bar.<\/li>\n<li>Select \u201cTwitter API v2\u201d.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/andrejacobs.org\/wp-content\/uploads\/2022\/05\/twitter5.png\" alt=\"\"><\/p>\n<ul>\n<li>Open up the folders and search for the call you want to make. First I am going to repeat the username lookup. Notice that I also marked the workspace as a favourite so I can easilly find it again later.<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/andrejacobs.org\/wp-content\/uploads\/2022\/05\/twitter6.png\" alt=\"\"><\/p>\n<ul>\n<li>Unfortunately you won\u2019t be able to send any requests until you have forked the workspace. Click on the kebab (3 dot) menu and choose fork. Fill in the details and fork it.<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/andrejacobs.org\/wp-content\/uploads\/2022\/05\/twitterUntitled1.png\" alt=\"\"><\/p>\n<ul>\n<li>You will need to setup the keys, secrets and tokens etc. to be used by Postman. To do so you will need to setup an environment first. The easiest way is to fork the environment \u201cTwitter API v2\u201d from the Twitter\u2019s Public postman workspace.\n<ul>\n<li>Go back to the Twitter Public workspace.<\/li>\n<li>Select the \u201cTwitter API v2\u201d from the Environment dropdown and then click on the Eye icon next to it. Then select Edit.<\/li>\n<li>From there you can select the kebab menu and choose to create a fork.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/andrejacobs.org\/wp-content\/uploads\/2022\/05\/twitterUntitled2.png\" alt=\"\"><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/andrejacobs.org\/wp-content\/uploads\/2022\/05\/twitterUntitled3.png\" alt=\"\"><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/andrejacobs.org\/wp-content\/uploads\/2022\/05\/twitter7.png\" alt=\"\"><\/p>\n<ul>\n<li>Ensure you are using your Workspace forked from the Twitter one and also select the environment you forked. Then edit the environment so you can set the values required.<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/andrejacobs.org\/wp-content\/uploads\/2022\/05\/twitter8.png\" alt=\"\"><\/p>\n<ul>\n<li>Since the <a href=\"https:\/\/developer.twitter.com\/en\/docs\/twitter-api\/users\/lookup\/quick-start\/user-lookup\">User lookup<\/a> API can be used using the <code>OAuth 2.0 App-Only<\/code> method, I will set only the <code>bearer_token<\/code>&#8216;s initial and current value to the Bearer token I received from the developer dashboard. NOTE: I also set the type to secret so that it doesn\u2019t appear on screen.<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/andrejacobs.org\/wp-content\/uploads\/2022\/05\/twitter9.png\" alt=\"\"><\/p>\n<ul>\n<li>Save the changes and then select the \u201cUser Lookup \/ User by Username\u201d request from the workspace. Fill in the username to lookup in the Path Variables section.<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/andrejacobs.org\/wp-content\/uploads\/2022\/05\/twitter10.png\" alt=\"\"><\/p>\n<ul>\n<li>Select the Authorization tab and change the Type to Bearer Token. For the token field enter \u201c{{bearer_token}}\u201d. Changing the selected environment will alter where this value is received from, the default being from the collection. Environment variables override Collection ones.<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/andrejacobs.org\/wp-content\/uploads\/2022\/05\/twitter11.png\" alt=\"\"><\/p>\n<ul>\n<li>Click on Send and you should get a valid response back if the autorization worked.<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/andrejacobs.org\/wp-content\/uploads\/2022\/05\/twitter12.png\" alt=\"\"><\/p>\n<ul>\n<li>Now we can try sending an actual tweet.<\/li>\n<li>Following this <a href=\"https:\/\/developer.twitter.com\/en\/docs\/twitter-api\/tweets\/manage-tweets\/quick-start\">guide<\/a> I will be using the <code>OAuth 1.0a User Context<\/code> method for authentication.\n<ul>\n<li>You will need: API Key, API Secret Key (that your received while setting up an app).<\/li>\n<li>You will also need: OAuth 1.0a user Access Token, and OAuth 1.0a user Access Token Secret.<\/li>\n<li>See the first section on how I generated these tokens and secrets.<\/li>\n<\/ul>\n<\/li>\n<li>Go back to editing the Postman Environment variables and set the consumer_key (API Key), consumer_secret (API Secret), access_token (User token), token_secret (User token secret).<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/andrejacobs.org\/wp-content\/uploads\/2022\/05\/twitter13.png\" alt=\"\"><\/p>\n<ul>\n<li>Select the \u201cManage Tweets \/ Create a Tweet\u201d request from the collection.<\/li>\n<li>Select the Body tab and change the \u201ctext\u201d value to the comment you want to post on Twitter.<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/andrejacobs.org\/wp-content\/uploads\/2022\/05\/twitter14.png\" alt=\"\"><\/p>\n<ul>\n<li>Send and you should get a response back that gives you the ID of the tweet.<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/andrejacobs.org\/wp-content\/uploads\/2022\/05\/twitter15.png\" alt=\"\"><\/p>\n<ul>\n<li>Go onto Twitter and check the tweet was posted as expected.<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/andrejacobs.org\/wp-content\/uploads\/2022\/05\/twitter16.png\" alt=\"\"><\/p>\n<ul>\n<li>Next I will delete that tweet using the ID that was given to me in the response JSON.<\/li>\n<li>Select the \u201cDelete a Tweet\u201d request and for the Path Variable \u201cid\u201d set the value to the id of the tweet you want to delete. Hit send.<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/andrejacobs.org\/wp-content\/uploads\/2022\/05\/twitter17.png\" alt=\"\"><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/andrejacobs.org\/wp-content\/uploads\/2022\/05\/twitter18.png\" alt=\"\"><\/p>\n<h3>Posting a Tweet using Golang<\/h3>\n<p>TL;DR; You can find the <a href=\"https:\/\/github.com\/andrejacobs\/example_twitter_golang\">example code here<\/a>.<\/p>\n<p>I will be using the <a href=\"https:\/\/github.com\/michimani\/gotwi\/\">gotwi<\/a> package for sending a tweet using the OAuth 1.0a method. I did try another package and ended up get a response from the API saying I needed elevated privileges, so now I will be using the more simpler gotwi package.<\/p>\n<ul>\n<li>Create the new directory and Go module.<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">$ mkdir twitter\n$ cd twitter\n$ go mod init twitter\n\n$ touch main.go\n<\/code><\/pre>\n<ul>\n<li>Add the dependency.<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">$ go get -u github.com\/michimani\/gotwi@latest\n<\/code><\/pre>\n<ul>\n<li>Edit main.go<\/li>\n<\/ul>\n<pre><code class=\"language-go\">package main\n\n\/\/ Source code based on the example:\n\/\/ https:\/\/github.com\/michimani\/gotwi\/blob\/main\/_examples\/2_post_delete_tweet\/main.go\n\nimport (\n\t&quot;context&quot;\n\t&quot;fmt&quot;\n\t&quot;os&quot;\n\n\t&quot;github.com\/michimani\/gotwi&quot;\n\t&quot;github.com\/michimani\/gotwi\/tweet\/managetweet&quot;\n\t&quot;github.com\/michimani\/gotwi\/tweet\/managetweet\/types&quot;\n)\n\nfunc main() {\n\n\t\/\/ Check expected secrets are set in the environment variables\n\taccessToken := os.Getenv(&quot;TW_ACCESS_TOKEN&quot;)\n\taccessSecret := os.Getenv(&quot;TW_ACCESS_SECRET&quot;)\n\n\tif accessToken == &quot;&quot; || accessSecret == &quot;&quot; {\n\t\tfmt.Fprintln(os.Stderr, &quot;Please set the TW_ACCESS_TOKEN and TW_ACCESS_SECRET environment variables.&quot;)\n\t\tos.Exit(1)\n\t}\n\n\t\/\/ Check the comment to tweet has been supplied\n\tif len(os.Args) != 2 {\n\t\tfmt.Fprintln(os.Stderr, &quot;Please pass the comment to tweet as the only argument.&quot;)\n\t\tos.Exit(1)\n\t}\n\n\tclient, err := newOAuth1Client(accessToken, accessSecret)\n\tif err != nil {\n\t\tfmt.Fprintln(os.Stderr, err)\n\t\tos.Exit(1)\n\t}\n\n\ttweetId, err := tweet(client, os.Args[1])\n\tif err != nil {\n\t\tfmt.Fprintln(os.Stderr, err)\n\t\tos.Exit(2)\n\t}\n\n\tfmt.Println(&quot;tweet id&quot;, tweetId)\n}\n\nfunc newOAuth1Client(accessToken, accessSecret string) (*gotwi.Client, error) {\n\tin := &amp;gotwi.NewClientInput{\n\t\tAuthenticationMethod: gotwi.AuthenMethodOAuth1UserContext,\n\t\tOAuthToken:           accessToken,\n\t\tOAuthTokenSecret:     accessSecret,\n\t}\n\n\treturn gotwi.NewClient(in)\n}\n\nfunc tweet(c *gotwi.Client, text string) (string, error) {\n\tp := &amp;types.CreateInput{\n\t\tText: gotwi.String(text),\n\t}\n\n\tres, err := managetweet.Create(context.Background(), c, p)\n\tif err != nil {\n\t\treturn &quot;&quot;, err\n\t}\n\n\treturn gotwi.StringValue(res.Data.ID), nil\n}\n<\/code><\/pre>\n<ul>\n<li>Create a file named <code>.env<\/code> that will store the environment variables to be used. <strong>NOTE:<\/strong> Make sure you don\u2019t commit this file into source control.<\/li>\n<\/ul>\n<pre><code class=\"language-bash\">#!\/bin\/bash\n# usage: source .env\nexport GOTWI_API_KEY=your_consumer_api_key\nexport GOTWI_API_KEY_SECRET=your_consumer_api_secret\n\n# OAuth 1.0a User token\nexport TW_ACCESS_TOKEN=your_oauth_user_token\nexport TW_ACCESS_SECRET=your_oauth_user_secret\n<\/code><\/pre>\n<ul>\n<li>Run the app<\/li>\n<\/ul>\n<pre><code class=\"language-bash\"># First without the environment variables\n$ go run . &quot;Test: Hello world from golang&quot;\nPlease set the TW_ACCESS_TOKEN and TW_ACCESS_SECRET environment variables.\nexit status 1\n\n# With the environment variables\n$ source .env\n$ go run . &quot;Test: Hello world from golang&quot;\ntweet id 1527644512285343745\n\n# If the secrets are incorrect you should get something like this\nThe Twitter API returned a Response with a status other than 2XX series. httpStatus=&quot;401 Unauthorized&quot; httpStatusCode=401\nexit status 2\n<\/code><\/pre>\n<ul>\n<li>Verify on Twitter it was sent. Whoohoo! &#x1f604;<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/andrejacobs.org\/wp-content\/uploads\/2022\/05\/twitter19.png\" alt=\"\"><\/p>\n<\/div>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Featured image by\u00a0Egon Elbre [&#8230;]<\/p>\n<p><a class=\"understrap-read-more-link\" href=\"https:\/\/andrejacobs.org\/projects\/send-twitter-tweets-using-go\/\">Read more &rarr;<\/a><\/p>\n","protected":false},"author":2,"featured_media":591,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[54],"tags":[56,53,55],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v19.13 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Send Twitter tweets using Go - Andr\u00e9 Jacobs<\/title>\n<meta name=\"description\" content=\"Let me show you how to use and send a tweet using Postman and Go using Twitter v2 APIs as a registered developer.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/andrejacobs.org\/projects\/send-twitter-tweets-using-go\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Send Twitter tweets using Go - 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