QueryList/README-EN.md

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  <img width="150" src="logo.png" alt="QueryList">
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# QueryList 
`QueryList` is a simple, elegant, extensible PHP crawler (spider) ,based on phpQuery.

## Features
- Have the same CSS3 DOM selector as jQuery
- Have the same DOM manipulation API as jQuery
- Have a generic list crawling program
- Have a strong HTTP request suite, easy to achieve such as: simulated landing, forged browser, HTTP proxy and other complex network requests
- Have a messy code solution
- Have powerful content filtering, you can use the jQuey selector to filter content
- Has a high degree of modular design, scalability and strong
- Have an expressive API
- Has a wealth of plug-ins

Through plug-ins you can easily implement things like:
- Multithreaded crawl
- Crawl JavaScript dynamic rendering page (PhantomJS/headless WebKit)
- Image downloads to local
- Simulate browser behavior such as submitting Form forms
- Web crawler
- .....

## Requirements
- PHP >= 7.0

## Installation
By Composer installation:
```
composer require jaeger/querylist
```

## Usage

#### DOM Traversal and Manipulation
-  采集「昵图网」所有图片地址

```php
QueryList::get('http://www.nipic.com')->find('img')->attrs('src');
```
- 采集百度搜索结果

```php
$ql = QueryList::get('http://www.baidu.com/s?wd=QueryList');

$ql->find('title')->text(); // 获取网站标题
$ql->find('meta[name=keywords]')->content; // 获取网站头部关键词

$ql->find('h3>a')->texts(); //获取搜索结果标题列表
$ql->find('h3>a')->attrs('href'); //获取搜索结果链接列表

$ql->find('img')->src; //获取第一张图片的链接地址
$ql->find('img:eq(1)')->src; //获取第二张图片的链接地址
$ql->find('img')->eq(2)->src; //获取第三张图片的链接地址
// 遍历所有图片
$ql->find('img')->map(function($img){
	echo $img->alt;  //打印图片的alt属性
});
```
- 更多用法

```php
$ql->find('#head')->append('<div>追加内容</div>')->find('div')->htmls();
$ql->find('.two')->children('img')->attrs('alt'); //获取class为two元素下的所有img孩子节点
//遍历class为two元素下的所有孩子节点
$data = $ql->find('.two')->children()->map(function ($item){
    //用is判断节点类型
    if($item->is('a')){
        return $item->text();
    }elseif($item->is('img'))
    {
        return $item->alt;
    }
});

$ql->find('a')->attr('href', 'newVal')->removeClass('className')->html('newHtml')->...
$ql->find('div > p')->add('div > ul')->filter(':has(a)')->find('p:first')->nextAll()->andSelf()->...
$ql->find('div.old')->replaceWith( $ql->find('div.new')->clone())->appendTo('.trash')->prepend('Deleted')->...
```
#### 列表采集
采集百度搜索结果列表的标题和链接:
```php
$data = QueryList::get('http://www.baidu.com/s?wd=QueryList')
	// 设置采集规则
    ->rules([ 
	    'title'=>array('h3','text'),
	    'link'=>array('h3>a','href')
	])
	->query()->getData();

print_r($data->all());
```
采集结果:
```
Array
(
    [0] => Array
        (
            [title] => QueryList|基于phpQuery的无比强大的PHP采集工具
            [link] => http://www.baidu.com/link?url=GU_YbDT2IHk4ns1tjG2I8_vjmH0SCJEAPuuZN
        )
    [1] => Array
        (
            [title] => PHP 用QueryList抓取网页内容 - wb145230 - 博客园
            [link] => http://www.baidu.com/link?url=zn0DXBnrvIF2ibRVW34KcRVFG1_bCdZvqvwIhUqiXaS
        )
    [2] => Array
        (
            [title] => 介绍- QueryList指导文档
            [link] => http://www.baidu.com/link?url=pSypvMovqS4v2sWeQo5fDBJ4EoYhXYi0Lxx
        )
        //...
)
```
#### 编码转换
```php
// 输出编码:UTF-8,输入编码:GB2312
QueryList::get('https://top.etao.com')->encoding('UTF-8','GB2312')->find('a')->texts();

// 输出编码:UTF-8,输入编码:自动识别
QueryList::get('https://top.etao.com')->encoding('UTF-8')->find('a')->texts();
```

#### HTTP网络操作
- 携带cookie登录新浪微博
```php
//采集新浪微博需要登录才能访问的页面
$ql = QueryList::get('http://weibo.com','param1=testvalue & params2=somevalue',[
    'headers' => [
        //填写从浏览器获取到的cookie
        'Cookie' => 'SINAGLOBAL=546064; wb_cmtLike_2112031=1; wvr=6;....'
    ]
]);
//echo $ql->getHtml();
echo $ql->find('title')->text();
//输出: 我的首页 微博-随时随地发现新鲜事
```
- 使用Http代理
```php
$urlParams = ['param1' => 'testvalue','params2' => 'somevalue'];
$opts = [
	// 设置http代理
    'proxy' => 'http://222.141.11.17:8118',
    //设置超时时间，单位：秒
    'timeout' => 30,
     // 伪造http头
    'headers' => [
        'Referer' => 'https://querylist.cc/',
        'User-Agent' => 'testing/1.0',
        'Accept'     => 'application/json',
        'X-Foo'      => ['Bar', 'Baz'],
        'Cookie'    => 'abc=111;xxx=222'
    ]
];
$ql->get('http://httpbin.org/get',$urlParams,$opts);
// echo $ql->getHtml();
```

- 模拟登录
```php
// 用post登录
$ql = QueryList::post('http://xxxx.com/login',[
    'username' => 'admin',
    'password' => '123456'
])->get('http://xxx.com/admin');
//采集需要登录才能访问的页面
$ql->get('http://xxx.com/admin/page');
//echo $ql->getHtml();
```

#### Form表单操作
模拟登陆GitHub
```php
// 获取QueryList实例
$ql = QueryList::getInstance();
//获取到登录表单
$form = $ql->get('https://github.com/login')->find('form');

//填写GitHub用户名和密码
$form->find('input[name=login]')->val('your github username or email');
$form->find('input[name=password]')->val('your github password');

//序列化表单数据
$fromData = $form->serializeArray();
$postData = [];
foreach ($fromData as $item) {
    $postData[$item['name']] = $item['value'];
}

//提交登录表单
$actionUrl = 'https://github.com'.$form->attr('action');
$ql->post($actionUrl,$postData);
//判断登录是否成功
// echo $ql->getHtml();
$userName = $ql->find('.header-nav-current-user>.css-truncate-target')->text();
if($userName)
{
    echo '登录成功!欢迎你:'.$userName;
}else{
    echo '登录失败!';
}
```
#### Bind功能扩展
自定义扩展一个`myHttp`方法:
```php
$ql = QueryList::getInstance();

//绑定一个myHttp方法到QueryList对象
$ql->bind('myHttp',function ($url){
    $html = file_get_contents($url);
    $this->setHtml($html);
    return $this;
});

//然后就可以通过注册的名字来调用
$data = $ql->myHttp('https://toutiao.io')->find('h3 a')->texts();
print_r($data->all());
```
或者把实现体封装到class，然后这样绑定:
```php
$ql->bind('myHttp',function ($url){
    return new MyHttp($this,$url);
});
```

#### 插件使用
- 使用PhantomJS插件采集JavaScript动态渲染的页面:

```php
// 安装时设置PhantomJS二进制文件路径 
$ql = QueryList::use(PhantomJs::class,'/usr/local/bin/phantomjs');

// 采集今日头条手机版
$data = $ql->browser('https://m.toutiao.com')->find('p')->texts();
print_r($data->all());

// 使用HTTP代理
$ql->browser('https://m.toutiao.com',false,[
	'--proxy' => '192.168.1.42:8080',
    '--proxy-type' => 'http'
])
```

- 使用CURL多线程插件,多线程采集GitHub排行榜:

```php
$ql = QueryList::use(CurlMulti::class);
$ql->curlMulti([
    'https://github.com/trending/php',
    'https://github.com/trending/go',
    //.....more urls
])
 // 每个任务成功完成调用此回调
 ->success(function (QueryList $ql,CurlMulti $curl,$r){
    echo "Current url:{$r['info']['url']} \r\n";
    $data = $ql->find('h3 a')->texts();
    print_r($data->all());
})
 // 每个任务失败回调
->error(function ($errorInfo,CurlMulti $curl){
    echo "Current url:{$errorInfo['info']['url']} \r\n";
    print_r($errorInfo['error']);
})
->start([
	// 最大并发数
    'maxThread' => 10,
    // 错误重试次数
    'maxTry' => 3,
]);

```

## 插件
- [jae-jae/QueryList-PhantomJS](https://github.com/jae-jae/QueryList-PhantomJS): 使用PhantomJS采集JavaScript动态渲染的页面
- [jae-jae/QueryList-CurlMulti](https://github.com/jae-jae/QueryList-CurlMulti) : Curl多线程采集
- [jae-jae/QueryList-AbsoluteUrl](https://github.com/jae-jae/QueryList-AbsoluteUrl) : 转换URL相对路径到绝对路径


查看更多的QueryList插件和基于QueryList的产品:[QueryList社区力量](https://github.com/jae-jae/QueryList-Community)

## 贡献
欢迎为QueryList贡献代码。关于贡献插件可以查看:[QueryList插件贡献说明](https://github.com/jae-jae/QueryList-Community/blob/master/CONTRIBUTING.md)

## 寻求帮助?
- QueryList主页: [http://querylist.cc](http://querylist.cc/)
- QueryList文档: [http://doc.querylist.cc](http://doc.querylist.cc/)
- QueryList问答:[http://wenda.querylist.cc](http://wenda.querylist.cc/)
- QueryList交流QQ群:123266961 <a target="_blank" href="http://shang.qq.com/wpa/qunwpa?idkey=a1b248ae30b3f711bdab4f799df839300dc7fed54331177035efa0513da027f6"><img border="0" src="http://pub.idqqimg.com/wpa/images/group.png" alt="cafeEX" title="cafeEX"></a>
- GitHub:https://github.com/jae-jae/QueryList
- Git@OSC:http://git.oschina.net/jae/QueryList

## Author
Jaeger <JaegerCode@gmail.com>

## Lisence
QueryList is licensed under the license of MIT. See the LICENSE for more details.