cpp-qt5-client: remove host since it is not well handled

[MartinDelille]

This PR replace part of the job done here: #3688

Now that the base path is well handled, the API class can use the one provided in the API description.

There was previously a mismatch between host and base path as mentionned here: #3399

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@ravinikam @stkrwork @etherealjoy @muttleyxd

[etherealjoy]

@MartinDelille
May I propose a different approach to solving this?

1. Leave the base path in the API as it is.

    fullPath.append(this->host).append(this->basePath).append("{{{path}}}");

There are many use cases to have base path as is. e.g.

• when same client is using multiple hosts at runtime.
• When using REST over an existing socket. (By subclassing QNetworkManager)

2. Properly parse the host and update/add constructor if necessary?

[MartinDelille]

You're right there is indeed a problem in this code I wrote this summer.

The problem I raised here and that I'm trying to solve is that http://api.example.com is not a host but its not a base path neither.

I need to dig into this

[etherealjoy]

I tried something quick on my side to add parsing of scheme

in AbstractCppCodegen.java add the parsing of the scheme like below

    @Override
    public void preprocessOpenAPI(OpenAPI openAPI) {
        URL url = URLPathUtils.getServerURL(openAPI, serverVariableOverrides());
        String port = URLPathUtils.getPort(url, "");
        String host = url.getHost();
        String scheme = url.getProtocol();
        
        if(!port.isEmpty()) {
            this.additionalProperties.put("serverPort", port);
        }
        if(!host.isEmpty()) {
            this.additionalProperties.put("serverHost", host);
        }
        if(!scheme.isEmpty()) {
            this.additionalProperties.put("scheme", scheme);
        }
    }

Then you can remove all these lines from the three header files

private:
    const QString PetStoreHost = QStringLiteral("http://petstore.swagger.io");

And from all three source files

    api.setHost(PetStoreHost);

Generated constructor looks like this

PFXPetApi::PFXPetApi() : basePath("/v2"),
    host("http://petstore.swagger.io"),
    timeout(0){

I ran the test and it passed with these changes.

[MartinDelille]

The only thing is that as I said above, http://api.example.com is more a base url that a host (the host is api.example.com), so maybe we should rename host to baseUrl in the api class?

[etherealjoy]

so maybe we should rename host to baseUrl in the api class?

Ok for me

[MartinDelille]

Ok I finally change to the following implementation.

I had to rebase #4435 so maybe we should merge it first if everything is fine with it.