65 lines
2.5 KiB
Markdown
65 lines
2.5 KiB
Markdown
# Architecture
|
|
|
|
The general pattern of usage is to instantiate the `ReCaptcha` class with your
|
|
secret key, specify any additional validation rules, and then call `verify()`
|
|
with the reCAPTCHA response and user's IP address. For example:
|
|
|
|
```php
|
|
<?php
|
|
$recaptcha = new \ReCaptcha\ReCaptcha($secret);
|
|
$resp = $recaptcha->setExpectedHostname('recaptcha-demo.appspot.com')
|
|
->verify($gRecaptchaResponse, $remoteIp);
|
|
if ($resp->isSuccess()) {
|
|
// Verified!
|
|
} else {
|
|
$errors = $resp->getErrorCodes();
|
|
}
|
|
```
|
|
|
|
By default, this will use the
|
|
[`stream_context_create()`](https://secure.php.net/stream_context_create) and
|
|
[`file_get_contents()`](https://secure.php.net/file_get_contents) to make a POST
|
|
request to the reCAPTCHA service. This is handled by the
|
|
[`RequestMethod\Post`](./src/ReCaptcha/RequestMethod/Post.php) class.
|
|
|
|
## Alternate request methods
|
|
|
|
You may need to use other methods for making requests in your environment. The
|
|
[`ReCaptcha`](./src/ReCaptcha/ReCaptcha.php) class allows an optional
|
|
[`RequestMethod`](./src/ReCaptcha/RequestMethod.php) instance to configure this.
|
|
For example, if you want to use [cURL](https://secure.php.net/curl) instead you
|
|
can do this:
|
|
|
|
```php
|
|
<?php
|
|
$recaptcha = new \ReCaptcha\ReCaptcha($secret, new \ReCaptcha\RequestMethod\CurlPost());
|
|
```
|
|
|
|
Alternatively, you can also use a [socket](https://secure.php.net/fsockopen):
|
|
|
|
```php
|
|
<?php
|
|
$recaptcha = new \ReCaptcha\ReCaptcha($secret, new \ReCaptcha\RequestMethod\SocketPost());
|
|
```
|
|
|
|
## Adding new request methods
|
|
|
|
Create a class that implements the
|
|
[`RequestMethod`](./src/ReCaptcha/RequestMethod.php) interface. The convention
|
|
is to name this class `RequestMethod\`_MethodType_`Post` and create a separate
|
|
`RequestMethod\`_MethodType_ class that wraps just the calls to the network
|
|
calls themselves. This means that the `RequestMethod\`_MethodType_`Post` can be
|
|
unit tested by passing in a mock. Take a look at
|
|
[`RequestMethod\CurlPost`](./src/ReCaptcha/RequestMethod/CurlPost.php) and
|
|
[`RequestMethod\Curl`](./src/ReCaptcha/RequestMethod/Curl.php) with the matching
|
|
[`RequestMethod/CurlPostTest`](./tests/ReCaptcha/RequestMethod/CurlPostTest.php)
|
|
to see this pattern in action.
|
|
|
|
### Error conventions
|
|
|
|
The client returns the response as provided by the reCAPTCHA services augmented
|
|
with additional error codes based on the client's checks. When adding a new
|
|
[`RequestMethod`](./src/ReCaptcha/RequestMethod.php) ensure that it returns the
|
|
`ReCaptcha::E_CONNECTION_FAILED` and `ReCaptcha::E_BAD_RESPONSE` where
|
|
appropriate.
|