2019-09-02 04:29:36 +00:00
|
|
|
use super::{ApiError, ApiResult};
|
|
|
|
|
use http::header;
|
|
|
|
|
use hyper::{Body, Request, Response, StatusCode};
|
|
|
|
|
use serde::Serialize;
|
|
|
|
|
use ssz::Encode;
|
|
|
|
|
|
|
|
|
|
pub enum Encoding {
|
|
|
|
|
JSON,
|
|
|
|
|
SSZ,
|
|
|
|
|
YAML,
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
pub struct ResponseBuilder {
|
|
|
|
|
encoding: Encoding,
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
impl ResponseBuilder {
|
|
|
|
|
pub fn new(req: &Request<Body>) -> Self {
|
|
|
|
|
let encoding = match req.headers().get(header::CONTENT_TYPE) {
|
|
|
|
|
Some(h) if h == "application/ssz" => Encoding::SSZ,
|
|
|
|
|
Some(h) if h == "application/yaml" => Encoding::YAML,
|
|
|
|
|
_ => Encoding::JSON,
|
|
|
|
|
};
|
|
|
|
|
|
|
|
|
|
Self { encoding }
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
pub fn body<T: Serialize + Encode>(self, item: &T) -> ApiResult {
|
2019-09-04 14:36:06 +00:00
|
|
|
let (body, content_type) = match self.encoding {
|
|
|
|
|
Encoding::JSON => (
|
|
|
|
|
Body::from(serde_json::to_string(&item).map_err(|e| {
|
|
|
|
|
ApiError::ServerError(format!(
|
|
|
|
|
"Unable to serialize response body as JSON: {:?}",
|
|
|
|
|
e
|
|
|
|
|
))
|
|
|
|
|
})?),
|
|
|
|
|
"application/json",
|
|
|
|
|
),
|
|
|
|
|
Encoding::SSZ => (Body::from(item.as_ssz_bytes()), "application/ssz"),
|
|
|
|
|
Encoding::YAML => (
|
|
|
|
|
Body::from(serde_yaml::to_string(&item).map_err(|e| {
|
|
|
|
|
ApiError::ServerError(format!(
|
|
|
|
|
"Unable to serialize response body as YAML: {:?}",
|
|
|
|
|
e
|
|
|
|
|
))
|
|
|
|
|
})?),
|
|
|
|
|
"application/ssz",
|
|
|
|
|
),
|
2019-09-02 04:29:36 +00:00
|
|
|
};
|
|
|
|
|
|
|
|
|
|
Response::builder()
|
|
|
|
|
.status(StatusCode::OK)
|
2019-09-04 14:36:06 +00:00
|
|
|
.header("content-type", content_type)
|
2019-09-02 04:29:36 +00:00
|
|
|
.body(Body::from(body))
|
|
|
|
|
.map_err(|e| ApiError::ServerError(format!("Failed to build response: {:?}", e)))
|
|
|
|
|
}
|
|
|
|
|
}
|
