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Add cache-busting and server headers with a wrapper.

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In order to support custom headers for various response types,
  this commit adds a wrapper type, ResponseWrapper, which can service
  all types of response in `bin`.

For paste objects, the preferred `Last-Modified` is used, so that caches
  can compare their exact timings with the HEAD response when
  revalidating.

For static objects, an `ETag` is used instead, based on the Cargo version
  and git hash of the codebase at compilation time; a `build.rs` is used
  for this.
This commit is contained in:
Leonora Tindall 2022-02-04 13:47:30 -06:00 • committed by Gunwant Jain
commit 2ab7ddb9c8
12 changed files with 291 additions and 152 deletions
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15
src/main.rs
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@ -3,6 +3,7 @@ extern crate rocket;
use std::{fs, net::IpAddr, path::PathBuf};
use clap::Parser;
use once_cell::sync::Lazy;
use rocket::{
figment::{providers::Env, Figment},
shield::{NoSniff, Shield},
@ -13,6 +14,18 @@ use rust_embed::RustEmbed;
mod models;
mod routes;
const BINARY_VERSION: &str =
concat!(env!("CARGO_PKG_VERSION"), env!("GIT_HASH"));
const SERVER_VERSION: &str = concat!(
"bin v.",
env!("CARGO_PKG_VERSION"),
" (",
env!("GIT_HASH"),
") (Rocket)"
);
static BINARY_ETAG: Lazy<String> =
Lazy::new(|| sha256::digest(BINARY_VERSION));
#[derive(RustEmbed)]
#[folder = "templates/"]
struct EmbeddedTemplates;
@ -91,7 +104,7 @@ fn rocket() -> _ {
routes::retrieve::retrieve,
routes::retrieve::retrieve_ext,
routes::pretty_retrieve::pretty_retrieve,
routes::pretty_retrieve_ext::pretty_retrieve_ext
routes::pretty_retrieve::pretty_retrieve_ext
],
)
.attach(shield)