Custom Resolver

In vielpork, Resolver is a trait used to resolve the source of resources. vielpork provides a built-in UrlResolver for downloading resources from URLs. You can customize the resolution logic by implementing the Resolver trait.

The trait defined in vielport::base::traits is ResourceResolver. ResourceResolver defines a method for resolving the source of resources.

#![allow(unused)]
fn main() {
#[async_trait]
pub trait ResourceResolver: Send + Sync {
    async fn resolve(&self, resource: &DownloadResource) -> Result<ResolvedResource>;
}
}

What Are Resolvers For?

Resolver is used to convert DownloadResource to ResolvedResource. DownloadResource is an enum type that contains different types of resources. ResolvedResource is a struct that contains detailed information required for an HTTP request.

#![allow(unused)]
fn main() {
// The `DownloadResource` enum type defined in `vielpork::base::enums`

#[derive(Debug, Clone, Serialize, Deserialize)]
pub enum DownloadResource {
    Url(String),
    Id(String), 
    Params(Vec<String>),
    HashMap(HashMap<String, String>),
    Resolved(ResolvedResource),
}
}

#![allow(unused)]
fn main() {
// The `ResolvedResource` struct defined in `vielpork::base::structs`
#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ResolvedResource {
    pub id: u32,
    pub url: String,
    pub headers: Vec<(String, String)>,
    pub auth: Option<AuthMethod>,
}
}

In this context, AuthMethod supports three authentication methods: Basic, Bearer, andApiKey.

#![allow(unused)]
fn main() {
// The `AuthMethod` enum type defined in `vielpork::base::enums`

#[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
pub enum AuthMethod {
    None,
    Basic { username: String, password: String },
    Bearer { token: String },
    ApiKey { key: String, header: String },
}
}