mirror of
https://github.com/RSS-Bridge/rss-bridge.git
synced 2024-12-21 03:37:19 +03:00
83 lines
No EOL
2.6 KiB
Markdown
83 lines
No EOL
2.6 KiB
Markdown
`WebDriverAbstract` extends [`BridgeAbstract`](./02_BridgeAbstract.md) and adds functionality for generating feeds
|
|
from active websites that use XMLHttpRequest (XHR) to load content and / or JavaScript to
|
|
modify content.
|
|
It highly depends on the php-webdriver library which offers Selenium WebDriver bindings for PHP.
|
|
|
|
- https://github.com/php-webdriver/php-webdriver (Project Repository)
|
|
- https://php-webdriver.github.io/php-webdriver/latest/ (API)
|
|
|
|
Please note that this class is intended as a solution for websites _that cannot be covered
|
|
by the other classes_. The WebDriver starts a browser and is therefore very resource-intensive.
|
|
|
|
# Configuration
|
|
|
|
You need a running WebDriver to use bridges that depend on `WebDriverAbstract`.
|
|
The easiest way is to start the Selenium server from the project of the same name:
|
|
```
|
|
docker run -d -p 4444:4444 --shm-size="2g" docker.io/selenium/standalone-chrome:latest
|
|
```
|
|
|
|
- https://github.com/SeleniumHQ/docker-selenium
|
|
|
|
With these parameters only one browser window can be started at a time.
|
|
On a multi-user site, Selenium Grid should be used
|
|
and the number of sessions should be adjusted to the number of processor cores.
|
|
|
|
Finally, the `config.ini.php` file must be adjusted so that the WebDriver
|
|
can find the Selenium server:
|
|
```
|
|
[webdriver]
|
|
|
|
selenium_server_url = "http://localhost:4444"
|
|
```
|
|
|
|
# Development
|
|
|
|
While you are programming a new bridge, it is easier to start a local WebDriver because then you can see what is happening and where the errors are. I've also had good experience recording the process with a screen video to find any timing problems.
|
|
|
|
```
|
|
chromedriver --port=4444
|
|
```
|
|
|
|
- https://chromedriver.chromium.org/
|
|
|
|
If you start rss-bridge from a container, then Chrome driver is only accessible
|
|
if you call it with the `--allowed-ips` option so that it binds to all network interfaces.
|
|
|
|
```
|
|
chromedriver --port=4444 --allowed-ips=192.168.1.42
|
|
```
|
|
|
|
The **most important rule** is that after an event such as loading the web page
|
|
or pressing a button, you often have to explicitly wait for the desired elements to appear.
|
|
|
|
A simple example is the bridge `ScalableCapitalBlogBridge.php`.
|
|
A more complex and relatively complete example is the bridge `GULPProjekteBridge.php`.
|
|
|
|
# Template
|
|
|
|
Use this template to create your own bridge.
|
|
|
|
```PHP
|
|
<?php
|
|
|
|
class MyBridge extends WebDriverAbstract
|
|
{
|
|
const NAME = 'My Bridge';
|
|
const URI = 'https://www.example.org';
|
|
const DESCRIPTION = 'Further description';
|
|
const MAINTAINER = 'your name';
|
|
|
|
public function collectData()
|
|
{
|
|
parent::collectData();
|
|
|
|
try {
|
|
// TODO
|
|
} finally {
|
|
$this->cleanUp();
|
|
}
|
|
}
|
|
}
|
|
|
|
``` |