google api 授权及使用 总结

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composer require google/apiclient:^2.12.1

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<?php

require __DIR__ . '/vendor/autoload.php';

use Google\Client;
use Google\Service\Gmail;

function getLabels()
{
    $client = new Client();
    $client->setApplicationName('Gmail API PHP Quickstart');
    $client->setScopes('https://www.googleapis.com/auth/gmail.readonly');
    $client->setAuthConfig("client_secret.json");
    $client->setAccessType('offline');
    $client->setPrompt('select_account consent');
    $tokenPath = "token.json";
    if (file_exists($tokenPath)) {
        $accessToken = json_decode(file_get_contents($tokenPath), true);
        $client->setAccessToken($accessToken);
    } else if ($authCode = $_GET["code"]) {
        // Exchange authorization code for an access token.
        $accessToken = $client->fetchAccessTokenWithAuthCode($authCode);
        $client->setAccessToken($accessToken);

        // Check to see if there was an error.
        if (array_key_exists('error', $accessToken)) {
            throw new \Exception(join(', ', $accessToken));
        }
        // Save the token to a file.
        if (!file_exists(dirname($tokenPath))) {
            mkdir(dirname($tokenPath), 0700, true);
        }
        file_put_contents($tokenPath, json_encode($client->getAccessToken()));
    }

    // If there is no previous token or it's expired.
    if ($client->isAccessTokenExpired()) {
        // Refresh the token if possible, else fetch a new one.
        if ($client->getRefreshToken()) {
            $client->fetchAccessTokenWithRefreshToken($client->getRefreshToken());
        } else {
            // Request authorization from the user.
            $authUrl = $client->createAuthUrl();
            header("Location: " . $authUrl);
        }
    }
    try {
        $service = new Gmail($client);
        // Print the labels in the user's account.
        $user = 'me';
        $results = $service->users_labels->listUsersLabels($user);

        if (count($results->getLabels()) == 0) {
            print "No labels found.\n";
        } else {
            print "Labels:\n";
            foreach ($results->getLabels() as $label) {
                printf("- %s\n", $label->getName());
            }
        }
    } catch (\Exception $e) {
        echo "Message: " . $e->getMessage();
    }
}

getLabels();

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$gmailService = new Google_Service_Gmail($client);

$labels = $gmailService->users_labels->listUsersLabels("me");

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PHP Fatal error:  Uncaught Google\Service\Exception: {
  "error": {
    "code": 400,
    "message": "Precondition check failed.",
    "errors": [
      {
        "message": "Precondition check failed.",
        "domain": "global",
        "reason": "failedPrecondition"
      }
    ],
    "status": "FAILED_PRECONDITION"
  }
}