Can I set base path to ktor client?

What I expect:

val http = HttpClient(Apache.create()) {
  install(HttpBasePath) {
    basePath = "http://somewhere.in"
  }
}
http.get("/a") // => http://somewhere.in/a
http.get("http://a.b.com") // => http://a.b.com

I tried implementing the above feature, but I couldn’t tell a “localhost” string is the something set or just default.

[sgarfinkel]

defaultRequest can be used to get this behavior, sort of:

val basepath = Url("https://example.com")

val client = HttpClient {
    defaultRequest {
        url.takeFrom(URLBuilder().takeFrom(basepath).apply {
            encodedPath += url.encodedPath
        })
    }
}

// calls https://example.com/foo/bar
client.get {
    url {
        path("foo", "bar")
    }
}

Note that the url that is in scope in the defaultRequest block is the url defined in the original request–in this case the client.get { } call.

[gildor]

It would be a very useful feature because most of REST APIs is some host + base path (usually with API version), so you want to extract this part and use for all your reqests that use particular instance of HttpClient Probably make sense to support new property baseUrl/basePath that includes protocol, host and path prefix. IMO it’s the most common way to specify base path. One more open question how to override base path (not base host), maybe we should use the same behavior as Retrofit, which ahas baseUrl (host + basePath). if particular request path starts from / basePath will be ignored (request explicitly uses full path), otherwise basePath will be used