PHP Classes

File: crawler

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  Classes of Igor Dyshlenko   PHP Image Crawler   crawler   Download  
File: crawler
Role: Example script
Content type: text/plain
Description: Example script
Class: PHP Image Crawler
Crawl Web site pages to find images in the pages
Author: By
Last change:
Date: 2 years ago
Size: 1,807 bytes
 

Contents

Class file image Download
#!/usr/bin/env php
<?php
if (!file_exists(__DIR__ . '/vendor/autoload.php')) {
    echo
"\nThe crawler utility not installed. Use \"composer install\" or \"composer update\" for install.\n\n";
    exit(
1);
}

error_reporting(E_ERROR);

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

use
App\Console\ArgumentHolder;
use
App\ContentLoader;
use
App\ImgCountHandler;
use
Domain\Site;

const
DEFAULT_TIMEOUT = 60,
DEFAULT_LEVEL = PHP_INT_MAX,
SITE_INDEX = 0;

$consoleArguments = new ArgumentHolder();

$url = $consoleArguments->getParameter(SITE_INDEX);

$paramsError =
    (
filter_var($url, FILTER_VALIDATE_URL, FILTER_FLAG_SCHEME_REQUIRED | FILTER_FLAG_HOST_REQUIRED) === false) ||
    ((
$parsed = parse_url($url)) === false);
$paramsError |= (!in_array($parsed['scheme'] ?? [], ['http', 'https'], true));
if (
$paramsError) {
    echo
"\nIncorrect URL ", $url, "\n\nUse the utility as follows.\n\n";
}

if (
$paramsError || $url === null || $consoleArguments->getOption('h') !== null) {
    if (
$text = file_get_contents('help.txt')) {
        echo
$text;
    } else {
        echo
"File \"help.txt\" not found.\n";
    }
    exit(
1);
}
$start = microtime(true);
set_time_limit($consoleArguments->getOption('t') ?? DEFAULT_TIMEOUT);

$loader = ContentLoader::getInstance();
$site = new Site($url);
$handler = new ImgCountHandler($site, $url, $loader, [], $consoleArguments->getOption('l') ?? DEFAULT_LEVEL);

$report = $handler->handle($url);
$fullFilename = ($consoleArguments->getOption('d') ?? '.') . '/' . $report->getDefaultFilename();

if (
file_put_contents($fullFilename, $report->getContent()) === false) {
    echo
"\n\nFile ", $fullFilename, " cann't be saved.";
    exit(
1);
}

echo
"\nFile ", $fullFilename, " saved.\n", sprintf("Full runtime = %.3f sec.\n", microtime(true) - $start);