Welcome folks today in this blog post we will be sending email and getting inbox messages and displaying it in browser using javascript. All the full source code of the application is shown below.
Get Started
In order to get started you need to go to cloud console
and enable the gmail api
and then you need to create the client id and the api key as shown below
Getting Inbox Messages Using Gmail API
Now we will be getting the inbox messages using the gmail api in javascript.
index.html
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<!doctype html> <html> <head> <title>Gmail API demo</title> <meta charset="UTF-8"> <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css"> <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap-theme.min.css"> <style> iframe { width: 100%; border: 0; min-height: 80%; height: 600px; display: flex; } </style> </head> <body> <div class="container"> <h1>Gmail API demo</h1> <button id="authorize-button" class="btn btn-primary hidden">Authorize</button> <table class="table table-striped table-inbox hidden"> <thead> <tr> <th>From</th> <th>Subject</th> <th>Date/Time</th> </tr> </thead> <tbody></tbody> </table> </div> <script src="//code.jquery.com/jquery-1.11.3.min.js"></script> <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script> <script type="text/javascript"> var clientId = 'xxxxxxxxxxxx-xxxxxxxxxxxxxxxxxxxxxxx.apps.googleusercontent.com'; var apiKey = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'; var scopes = 'https://www.googleapis.com/auth/gmail.readonly'; function handleClientLoad() { gapi.client.setApiKey(apiKey); window.setTimeout(checkAuth, 1); } function checkAuth() { gapi.auth.authorize({ client_id: clientId, scope: scopes, immediate: true }, handleAuthResult); } function handleAuthClick() { gapi.auth.authorize({ client_id: clientId, scope: scopes, immediate: false }, handleAuthResult); return false; } function handleAuthResult(authResult) { if(authResult && !authResult.error) { loadGmailApi(); $('#authorize-button').remove(); $('.table-inbox').removeClass("hidden"); } else { $('#authorize-button').removeClass("hidden"); $('#authorize-button').on('click', function(){ handleAuthClick(); }); } } function loadGmailApi() { gapi.client.load('gmail', 'v1', displayInbox); } function displayInbox() { var request = gapi.client.gmail.users.messages.list({ 'userId': 'me', 'labelIds': 'INBOX', 'maxResults': 10 }); request.execute(function(response) { $.each(response.messages, function() { var messageRequest = gapi.client.gmail.users.messages.get({ 'userId': 'me', 'id': this.id }); messageRequest.execute(appendMessageRow); }); }); } function appendMessageRow(message) { $('.table-inbox tbody').append( '<tr>\ <td>'+getHeader(message.payload.headers, 'From')+'</td>\ <td>\ <a href="#message-modal-' + message.id + '" data-toggle="modal" id="message-link-' + message.id+'">' + getHeader(message.payload.headers, 'Subject') + '</a>\ </td>\ <td>'+getHeader(message.payload.headers, 'Date')+'</td>\ </tr>' ); $('body').append( '<div class="modal fade" id="message-modal-' + message.id + '" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">\ <div class="modal-dialog modal-lg">\ <div class="modal-content">\ <div class="modal-header">\ <button type="button"\ class="close"\ data-dismiss="modal"\ aria-label="Close">\ <span aria-hidden="true">×</span></button>\ <h4 class="modal-title" id="myModalLabel">' + getHeader(message.payload.headers, 'Subject') + '</h4>\ </div>\ <div class="modal-body">\ <iframe id="message-iframe-'+message.id+'" srcdoc="<p>Loading...</p>">\ </iframe>\ </div>\ </div>\ </div>\ </div>' ); $('#message-link-'+message.id).on('click', function(){ var ifrm = $('#message-iframe-'+message.id)[0].contentWindow.document; $('body', ifrm).html(getBody(message.payload)); }); } function getHeader(headers, index) { var header = ''; $.each(headers, function(){ if(this.name === index){ header = this.value; } }); return header; } function getBody(message) { var encodedBody = ''; if(typeof message.parts === 'undefined') { encodedBody = message.body.data; } else { encodedBody = getHTMLPart(message.parts); } encodedBody = encodedBody.replace(/-/g, '+').replace(/_/g, '/').replace(/\s/g, ''); return decodeURIComponent(escape(window.atob(encodedBody))); } function getHTMLPart(arr) { for(var x = 0; x <= arr.length; x++) { if(typeof arr[x].parts === 'undefined') { if(arr[x].mimeType === 'text/html') { return arr[x].body.data; } } else { return getHTMLPart(arr[x].parts); } } return ''; } </script> <script src="https://apis.google.com/js/client.js?onload=handleClientLoad"></script> </body> </html> |
Now you need to replace your own clientid
and apikey
that you have obtained from the google cloud console.
Sending Messages Using the Gmail API
Now we will be sending messages using the gmail api. For this create a sendmail.html
file and copy paste the following code
sendmail.html
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<!doctype html> <html> <head> <title>Gmail API demo</title> <meta charset="UTF-8"> <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap.min.css"> <link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.5/css/bootstrap-theme.min.css"> <style> iframe { width: 100%; border: 0; min-height: 80%; height: 600px; display: flex; } </style> </head> <body> <div class="container"> <h1>Gmail API demo</h1> <a href="#compose-modal" data-toggle="modal" id="compose-button" class="btn btn-primary pull-right hidden">Compose</a> <button id="authorize-button" class="btn btn-primary hidden">Authorize</button> <table class="table table-striped table-inbox hidden"> <thead> <tr> <th>From</th> <th>Subject</th> <th>Date/Time</th> </tr> </thead> <tbody></tbody> </table> </div> <div class="modal fade" id="compose-modal" tabindex="-1" role="dialog"> <div class="modal-dialog modal-lg"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"> <span aria-hidden="true">×</span> </button> <h4 class="modal-title">Compose</h4> </div> <form onsubmit="return sendEmail();"> <div class="modal-body"> <div class="form-group"> <input type="email" class="form-control" id="compose-to" placeholder="To" required /> </div> <div class="form-group"> <input type="text" class="form-control" id="compose-subject" placeholder="Subject" required /> </div> <div class="form-group"> <textarea class="form-control" id="compose-message" placeholder="Message" rows="10" required></textarea> </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> <button type="submit" id="send-button" class="btn btn-primary">Send</button> </div> </form> </div> </div> </div> <div class="modal fade" id="reply-modal" tabindex="-1" role="dialog"> <div class="modal-dialog modal-lg"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"> <span aria-hidden="true">×</span> </button> <h4 class="modal-title">Reply</h4> </div> <form onsubmit="return sendReply();"> <input type="hidden" id="reply-message-id" /> <div class="modal-body"> <div class="form-group"> <input type="text" class="form-control" id="reply-to" disabled /> </div> <div class="form-group"> <input type="text" class="form-control disabled" id="reply-subject" disabled /> </div> <div class="form-group"> <textarea class="form-control" id="reply-message" placeholder="Message" rows="10" required></textarea> </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> <button type="submit" id="reply-button" class="btn btn-primary">Send</button> </div> </form> </div> </div> </div> <script src="//code.jquery.com/jquery-1.11.3.min.js"></script> <script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.5/js/bootstrap.min.js"></script> <script type="text/javascript"> var clientId = 'xxxxxxxxxxxx-xxxxxxxxxxxxxxxxxxxxxxx.apps.googleusercontent.com'; var apiKey = 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx'; var scopes = 'https://www.googleapis.com/auth/gmail.readonly '+ 'https://www.googleapis.com/auth/gmail.send'; function handleClientLoad() { gapi.client.setApiKey(apiKey); window.setTimeout(checkAuth, 1); } function checkAuth() { gapi.auth.authorize({ client_id: clientId, scope: scopes, immediate: true }, handleAuthResult); } function handleAuthClick() { gapi.auth.authorize({ client_id: clientId, scope: scopes, immediate: false }, handleAuthResult); return false; } function handleAuthResult(authResult) { if(authResult && !authResult.error) { loadGmailApi(); $('#authorize-button').remove(); $('.table-inbox').removeClass("hidden"); $('#compose-button').removeClass("hidden"); } else { $('#authorize-button').removeClass("hidden"); $('#authorize-button').on('click', function(){ handleAuthClick(); }); } } function loadGmailApi() { gapi.client.load('gmail', 'v1', displayInbox); } function displayInbox() { var request = gapi.client.gmail.users.messages.list({ 'userId': 'me', 'labelIds': 'INBOX', 'maxResults': 10 }); request.execute(function(response) { $.each(response.messages, function() { var messageRequest = gapi.client.gmail.users.messages.get({ 'userId': 'me', 'id': this.id }); messageRequest.execute(appendMessageRow); }); }); } function appendMessageRow(message) { $('.table-inbox tbody').append( '<tr>\ <td>'+getHeader(message.payload.headers, 'From')+'</td>\ <td>\ <a href="#message-modal-' + message.id + '" data-toggle="modal" id="message-link-' + message.id+'">' + getHeader(message.payload.headers, 'Subject') + '</a>\ </td>\ <td>'+getHeader(message.payload.headers, 'Date')+'</td>\ </tr>' ); var reply_to = (getHeader(message.payload.headers, 'Reply-to') !== '' ? getHeader(message.payload.headers, 'Reply-to') : getHeader(message.payload.headers, 'From')).replace(/\"/g, '"'); var reply_subject = 'Re: '+getHeader(message.payload.headers, 'Subject').replace(/\"/g, '"'); $('body').append( '<div class="modal fade" id="message-modal-' + message.id + '" tabindex="-1" role="dialog" aria-labelledby="myModalLabel">\ <div class="modal-dialog modal-lg">\ <div class="modal-content">\ <div class="modal-header">\ <button type="button"\ class="close"\ data-dismiss="modal"\ aria-label="Close">\ <span aria-hidden="true">×</span></button>\ <h4 class="modal-title" id="myModalLabel">' + getHeader(message.payload.headers, 'Subject') + '</h4>\ </div>\ <div class="modal-body">\ <iframe id="message-iframe-'+message.id+'" srcdoc="<p>Loading...</p>">\ </iframe>\ </div>\ <div class="modal-footer">\ <button type="button" class="btn btn-default" data-dismiss="modal">Close</button>\ <button type="button" class="btn btn-primary reply-button" data-dismiss="modal" data-toggle="modal" data-target="#reply-modal"\ onclick="fillInReply(\ \''+reply_to+'\', \ \''+reply_subject+'\', \ \''+getHeader(message.payload.headers, 'Message-ID')+'\'\ );"\ >Reply</button>\ </div>\ </div>\ </div>\ </div>' ); $('#message-link-'+message.id).on('click', function(){ var ifrm = $('#message-iframe-'+message.id)[0].contentWindow.document; $('body', ifrm).html(getBody(message.payload)); }); } function sendEmail() { $('#send-button').addClass('disabled'); sendMessage( { 'To': $('#compose-to').val(), 'Subject': $('#compose-subject').val() }, $('#compose-message').val(), composeTidy ); return false; } function composeTidy() { $('#compose-modal').modal('hide'); $('#compose-to').val(''); $('#compose-subject').val(''); $('#compose-message').val(''); $('#send-button').removeClass('disabled'); } function sendReply() { $('#reply-button').addClass('disabled'); sendMessage( { 'To': $('#reply-to').val(), 'Subject': $('#reply-subject').val(), 'In-Reply-To': $('#reply-message-id').val() }, $('#reply-message').val(), replyTidy ); return false; } function replyTidy() { $('#reply-modal').modal('hide'); $('#reply-message').val(''); $('#reply-button').removeClass('disabled'); } function fillInReply(to, subject, message_id) { $('#reply-to').val(to); $('#reply-subject').val(subject); $('#reply-message-id').val(message_id); } function sendMessage(headers_obj, message, callback) { var email = ''; for(var header in headers_obj) email += header += ": "+headers_obj[header]+"\r\n"; email += "\r\n" + message; var sendRequest = gapi.client.gmail.users.messages.send({ 'userId': 'me', 'resource': { 'raw': window.btoa(email).replace(/\+/g, '-').replace(/\//g, '_') } }); return sendRequest.execute(callback); } function getHeader(headers, index) { var header = ''; $.each(headers, function(){ if(this.name.toLowerCase() === index.toLowerCase()){ header = this.value; } }); return header; } function getBody(message) { var encodedBody = ''; if(typeof message.parts === 'undefined') { encodedBody = message.body.data; } else { encodedBody = getHTMLPart(message.parts); } encodedBody = encodedBody.replace(/-/g, '+').replace(/_/g, '/').replace(/\s/g, ''); return decodeURIComponent(escape(window.atob(encodedBody))); } function getHTMLPart(arr) { for(var x = 0; x <= arr.length; x++) { if(typeof arr[x].parts === 'undefined') { if(arr[x].mimeType === 'text/html') { return arr[x].body.data; } } else { return getHTMLPart(arr[x].parts); } } return ''; } </script> <script src="https://apis.google.com/js/client.js?onload=handleClientLoad"></script> </body> </html> |