If you are working with the Twilio PHP Helper Library and need to modify the HTTP requests that the library makes to the Twilio servers you’re in the right place. The most common place you'll need to alter the HTTP request is to connect and authenticate with an enterprise’s proxy server. We’ll provide sample code that you can drop right into your app to handle this use case.
To connect and provide credentials to a proxy server between your app and Twilio, you need a way to modify the HTTP requests that the Twilio helper library makes to invoke the Twilio REST API.
How do we apply this to a typical Twilio REST API example?
$twilio = new Client($sid, $token); $message = $twilio->messages ->create("+15558675310", array( 'body' => "Hey there!", 'from' => "+15017122661" ) );
httpCient get created and used?
Out of the box, the helper library is creating a default
RequestClient for you, using the Twilio credentials you pass to the
init method. However, there’s nothing stopping you from creating your own
Once you have your own
RequestClient, you can pass it to any Twilio REST API resource action you want. Here’s an example of sending an SMS message with a custom client:
Take a closer look at the constructor for
HttpClient and you'll see that the
httpClient parameter is actually of type
Client is an abstraction that allows plugging in any HTTP client implementation you want (or even creating a mocking layer for unit testing).
However, within the helper library, there is an implementation of
CurlClient. This class wraps the
Twilio\Http\Client and provides it to the Twilio helper library to make the necessary HTTP requests.
Now that we understand how all the components fit together we can create our own
HttpClient that can connect through a proxy server. To make this reusable, here’s a class that you can use to create this
HttpClient whenever you need one.
In this example, we are using some environmental variables loaded at the program startup to retrieve various configuration settings:
Your Twilio Account Sid and Auth Token (found here, in the Twilio console)
A proxy address in IP:Port form, e.g.
Place these setting in an
.env file like so:
ACCOUNT_SID=ACxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx AUTH_TOKEN= your_auth_token PROXY=127.0.0.1:8888
Here’s the full console program that loads the
.env file and sends a text message to show everything fitting together.
Now that you know how to inject your own
httpClient into the Twilio API request pipeline, you could use this technique to add custom HTTP headers and authorization to the requests (perhaps as required by an upstream proxy server).
You could also implement your own
httpClient to mock the Twilio API responses so your unit and integration tests can run without the need to make a connection to Twilio. In fact, there’s already an example online showing how to do this in C#.
We can’t wait to see what you build!