posy 0.0.1

[wip] Python installer and package manager
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use super::super::http::{CacheMode, Http};
use super::project_info::ProjectInfo;
use crate::prelude::*;

use http::Request;

#[derive(Clone, Debug, Serialize, Deserialize)]
struct CacheEntry {
    etag: Option<String>,
    last_modified: Option<String>,
    content_type: String,
    body: String,
}

pub fn fetch_simple_api(http: &Http, url: &Url) -> Result<Option<ProjectInfo>> {
    context!("Fetching simple API page at {}", url);
    let request = Request::builder()
        .uri(url.as_str())
        .header("Cache-Control", "max-age=0")
        .body(())?;

    let response = http.request(request, CacheMode::Default)?;
    if response.status().as_u16() == 404 {
        return Ok(None);
    }
    if response.status().as_u16() >= 400 {
        bail!("error fetching {url}: {}", response.status().as_str());
    }
    let url = response.extensions().get::<Url>().unwrap().to_owned();
    let content_type = if let Some(value) = response.headers().get("Content-Type") {
        value.to_str()?
    } else {
        "text/html"
    }
    .to_owned();

    Ok(Some(super::parse_html(
        &url,
        &content_type,
        response.into_body(),
    )?))
}