我使用listMessages获取Id和getMessages来打印代码段，但它似乎不起作用：
function listMessages() {
gapi.client.gmail.users.messages.list({
'maxResults': 1000,
'userId': 'me',
'format': 'full',
}).then(function(response) {
appendPre('Files:');
var messages = response.result.messages;
if (messages && messages.length > 0) {
for (var i = 0; i < messages.length; i++) {
var message = messages[i];
var message_Id = message.id;
window.message_Id = message_Id;
getMessages();
}
} else {
appendPre('No files found.');
}
});
}
function getMessages() {
gapi.client.gmail.users.messages.get({
'maxResults': 1000,
'id': message_Id,
'userId': 'me',
'format': 'full',
}).then(function(response) {
var messages = response.result.messages;
if (messages && messages.length > 0) {
for (var i = 0; i < messages.length; i++) {
var message = messages[i];
appendPre(message.threadId + ' (' + message.snippet + ')');
}
else {
appendPre('No files found.');
}
});
}
出于某种原因，它只返回没有找到文件，我怎样才能打印出片段和Id？
答案 0 :(得分：0)
首先，我执行了此步骤https://developers.google.com/gmail/api/quickstart/nodejs
那之后，我就是这样：
const fs = require('fs');
const { google } = require('googleapis');
const TOKEN_PATH = 'token.json';
class ReadEmail {
constructor(_dominio) {
this.credentials = null;
this.auth = null;
this.message = null;
this.dominio = _dominio;
}
async setup() {
this.credentials = await this.getCredentials();
this.auth = await this.getAuthorize();
this.message = await this.getLastMessage();
}
getCredentials() {
return new Promise((resolve, reject) => {
fs.readFile('credentials.json', (err, content) => {
if (err) reject('Error loading client secret file:' + err);
resolve(JSON.parse(content));
});
});
}
getAuthorize() {
return new Promise((resolve, reject) => {
const { client_secret, client_id, redirect_uris } = this.credentials.installed;
const oAuth2Client = new google.auth.OAuth2(client_id, client_secret, redirect_uris[0]);
fs.readFile(TOKEN_PATH, (err, token) => {
if (err) reject('Erro ao pegar o Token: ' + err);
oAuth2Client.setCredentials(JSON.parse(token));
resolve(oAuth2Client);
});
});
}
getLastMessage() {
return new Promise((resolve, reject) => {
const gmail = google.gmail({ version: 'v1', auth: this.auth });
var request = gmail.users.messages.list({
userId: 'me',
labelIds: 'INBOX',
maxResults: 10,
});
request.then(ret => {
let id = ret.data.messages[0].id;
var request2 = gmail.users.messages.get({
userId: 'me',
id: id,
});
request2.then(ret2 => {
let msg = ret2.data.payload.body.data;
let buff = new Buffer.from(msg, 'base64');
let text = buff.toString('ascii');
console.log(text)
resolve(text);
});
});
});
}
}
new ReadEmail('_dominio').setup();
答案 1 :(得分：-1)
为了更好地理解，请尝试关注JavaScript的快速入门，这会显示一个简单的JavaScript应用程序，它会向Gmail API发出请求。
<!DOCTYPE html>
<html>
<head>
<title>Gmail API Quickstart</title>
<meta charset='utf-8' />
</head>
<body>
<p>Gmail API Quickstart</p>
<!--Add buttons to initiate auth sequence and sign out-->
<button id="authorize-button" style="display: none;">Authorize</button>
<button id="signout-button" style="display: none;">Sign Out</button>
<pre id="content"></pre>
<script type="text/javascript">
// Client ID and API key from the Developer Console
var CLIENT_ID = '<YOUR_CLIENT_ID>';
// Array of API discovery doc URLs for APIs used by the quickstart
var DISCOVERY_DOCS = ["https://www.googleapis.com/discovery/v1/apis/gmail/v1/rest"];
// Authorization scopes required by the API; multiple scopes can be
// included, separated by spaces.
var SCOPES = 'https://www.googleapis.com/auth/gmail.readonly';
var authorizeButton = document.getElementById('authorize-button');
var signoutButton = document.getElementById('signout-button');
/**
* On load, called to load the auth2 library and API client library.
*/
function handleClientLoad() {
gapi.load('client:auth2', initClient);
}
/**
* Initializes the API client library and sets up sign-in state
* listeners.
*/
function initClient() {
gapi.client.init({
discoveryDocs: DISCOVERY_DOCS,
clientId: CLIENT_ID,
scope: SCOPES
}).then(function () {
// Listen for sign-in state changes.
gapi.auth2.getAuthInstance().isSignedIn.listen(updateSigninStatus);
// Handle the initial sign-in state.
updateSigninStatus(gapi.auth2.getAuthInstance().isSignedIn.get());
authorizeButton.onclick = handleAuthClick;
signoutButton.onclick = handleSignoutClick;
});
}
/**
* Called when the signed in status changes, to update the UI
* appropriately. After a sign-in, the API is called.
*/
function updateSigninStatus(isSignedIn) {
if (isSignedIn) {
authorizeButton.style.display = 'none';
signoutButton.style.display = 'block';
listLabels();
} else {
authorizeButton.style.display = 'block';
signoutButton.style.display = 'none';
}
}
/**
* Sign in the user upon button click.
*/
function handleAuthClick(event) {
gapi.auth2.getAuthInstance().signIn();
}
/**
* Sign out the user upon button click.
*/
function handleSignoutClick(event) {
gapi.auth2.getAuthInstance().signOut();
}
/**
* Append a pre element to the body containing the given message
* as its text node. Used to display the results of the API call.
*
* @param {string} message Text to be placed in pre element.
*/
function appendPre(message) {
var pre = document.getElementById('content');
var textContent = document.createTextNode(message + '\n');
pre.appendChild(textContent);
}
/**
* Print all Labels in the authorized user's inbox. If no labels
* are found an appropriate message is printed.
*/
function listLabels() {
gapi.client.gmail.users.labels.list({
'userId': 'me'
}).then(function(response) {
var labels = response.result.labels;
appendPre('Labels:');
if (labels && labels.length > 0) {
for (i = 0; i < labels.length; i++) {
var label = labels[i];
appendPre(label.name)
}
} else {
appendPre('No Labels found.');
}
});
}
</script>
<script async defer src="https://apis.google.com/js/api.js"
onload="this.onload=function(){};handleClientLoad()"
onreadystatechange="if (this.readyState === 'complete') this.onload()">
</script>
</body>
</html>
要记住的事情：
gapi.auth.authorize 模式的 immediate:true 的来电将获得身份验证令牌而无需用户互动。另请点击链接进一步阅读：
这有助于您了解并熟悉Gmail API中的不同方法和功能。