configure base path for a client

[dbu]

Q	A
Bug?	no
New Feature?	yes

Actual Behavior

To configure a client with a default host, we can use the AddHostPlugin. However, this plugin can not be configured within HttplugBundle as far as i can see. I ended up doing this:

parameters:
    server: "http://localhost:8001"

services:
    app.http.todo_hostname_uri:
        class: Psr\Http\Message\UriInterface
        factory: ["@httplug.uri_factory", createUri]
        arguments: ["%server%"]
    app.http.plugin.todo_hostname:
        class: Http\Client\Common\Plugin\AddHostPlugin
        arguments: ["@app.http.todo_hostname_uri"]

httplug:
    clients:
        todo:
            factory: "httplug.factory.guzzle6"
            plugins: ["app.http.plugin.todo_hostname", "httplug.plugin.error"]

Possible Solutions

Not sure, but it should be easier than this imo. AddHostPlugin typehints UriInterface, and afaik we can't use a factory for an argument, hence we need to define a service for the uri object.

We could add a configuration in the clients.{name} space for default_host and force_host but i am not sure how well this scales with other options. maybe an options subsection?

[sagikazarmark]

What if we just add a base_url config? The URI factory can create a URI interface and add the plugin to the plugin chain. Order is a question again, as well as what if there is already such plugin in the chain.