On Thu, Oct 10, 2019, 6:42 PM Anton Fedonjuk <[email protected]>
wrote:
> Class contains method setRequest(RequestInterface $request), his abstact
> code:
> Request body already sets: $request->getBody()->write('...');
> I want send this request with other body content, but dont know how:
> 1. StreamInterface don't have methods as PHP ftruncate()
> 2. Constructor not defined in StreamInterface: can't use
> $request->withBody() because dont know how create clone of that Steam
> object without contents.
>
To provide new contents, you provide a new body to the request, which means
using a new StreamInterface instance.
To get a new StreamInterface instance, you either instantiate I've
directly, per the PSR-7 *implementation* you have installed, or you use a
PSR-17 StreamFactoryInterface instance to create it. This is something you
would compose into your class as a constructor dependency.
In each case, you need an *implementation* of one or both of the specs
installed, which is already likely the case.
In the first case, if using Diactoros, your code might look like this:
$request = $this->getRequest()
->withBody(new \Zend\Diactoros\Stream('php://temp', 'wb+'));
In the second, it would look like this:
$request = $this->getRequest()
->withBody($this->streamFactory->createStream());
>From there, you can call on the stream's write() method. Alternately, if
using the factory, create the entire stream *with contents* to save
yourself the step.
Regarding your point that there is no StreamInterface constructor,
the constructor is not defined in any of the interfaces because:
- We did not want to restrict how implementations wrote constructors.
- PHP ALWAYS allows classes implementing interfaces to override the
signature of a constructor.
As such, you always have to look at how the *implementation* to determine
the signature of constructors.
This is one large reason PSR-17 exists - to standardize how instances of
psr-7 interfaces are created.
Regardless, each of the above examples give you an instance with an empty
body.
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