Revert base64 dependency upgrade

Cargo.toml

@@ -25,7 +25,7 @@ path = "src/tests/all.rs"
 anyhow = "=1.0.66"
 aws-sigv4 = "=0.51.0"
 axum = "=0.6.1"
-base64 = "=0.20.0"
+base64 = "=0.13.1"
 cargo-registry-index = { path = "cargo-registry-index" }
 cargo-registry-markdown = { path = "cargo-registry-markdown" }
 cargo-registry-s3 = { path = "cargo-registry-s3" }

cargo-registry-index/Cargo.toml

@@ -15,7 +15,7 @@ testing = ["serde_json"]
 
 [dependencies]
 anyhow = "=1.0.66"
-base64 = "=0.20.0"
+base64 = "=0.13.1"
 dotenv = "=0.15.0"
 git2 = "=0.15.0"
 serde = { version = "=1.0.150", features = ["derive"] }

cargo-registry-s3/Cargo.toml

@@ -13,7 +13,7 @@ name = "s3"
 path = "lib.rs"
 
 [dependencies]
-base64 = "=0.20.0"
+base64 = "=0.13.1"
 chrono = "=0.4.23"
 sha-1 = "=0.10.1"
 hmac = "=0.12.1"

src/controllers/helpers/pagination.rs

@@ -6,8 +6,6 @@ use crate::util::errors::{bad_request, AppResult};
 use crate::util::request_header;
 
 use crate::App;
-use base64::alphabet::URL_SAFE;
-use base64::engine::fast_portable::{FastPortable, NO_PAD};
 use diesel::pg::Pg;
 use diesel::query_builder::*;
 use diesel::query_dsl::LoadQuery;
@@ -22,8 +20,6 @@ const MAX_PAGE_BEFORE_SUSPECTED_BOT: u32 = 10;
 const DEFAULT_PER_PAGE: u32 = 10;
 const MAX_PER_PAGE: u32 = 100;
 
-const URL_SAFE_NO_PAD: FastPortable = FastPortable::from(&URL_SAFE, NO_PAD);
-
 #[derive(Debug, Clone, PartialEq, Eq)]
 pub(crate) enum Page {
     Numeric(u32),
@@ -297,17 +293,17 @@ fn is_useragent_or_ip_blocked(config: &Server, req: &dyn RequestExt) -> bool {
 /// technical measure to prevent API consumers for manually creating or modifying them, but
 /// hopefully the base64 will be enough to convey that doing it is unsupported.
 pub(crate) fn encode_seek<S: Serialize>(params: S) -> AppResult<String> {
-    Ok(base64::encode_engine(
+    Ok(base64::encode_config(
         serde_json::to_vec(&params)?,
-        &URL_SAFE_NO_PAD,
+        base64::URL_SAFE_NO_PAD,
     ))
 }
 
 /// Decode a list of params previously encoded with [`encode_seek`].
 pub(crate) fn decode_seek<D: for<'a> Deserialize<'a>>(seek: &str) -> AppResult<D> {
-    Ok(serde_json::from_slice(&base64::decode_engine(
+    Ok(serde_json::from_slice(&base64::decode_config(
         seek,
-        &URL_SAFE_NO_PAD,
+        base64::URL_SAFE_NO_PAD,
     )?)?)
 }
 

src/metrics/log_encoder.rs

@@ -1,5 +1,3 @@
-use base64::alphabet::STANDARD;
-use base64::engine::fast_portable::{FastPortable, PAD};
 use base64::write::EncoderWriter;
 use indexmap::IndexMap;
 use prometheus::proto::{MetricFamily, MetricType};
@@ -13,8 +11,6 @@ use std::rc::Rc;
 
 const CHUNKS_MAX_SIZE_BYTES: usize = 5000;
 
-const BASE64_ENGINE: FastPortable = FastPortable::from(&STANDARD, PAD);
-
 /// The `LogEncoder` struct encodes Prometheus metrics in the format [`crates-io-heroku-metrics`]
 /// expects metrics to be logged. This can be used to forward instance metrics to it, allowing them
 /// to be scraped by the Rust infrastructure monitoring system.
@@ -139,7 +135,7 @@ fn serialize_and_split_list<'a, S: Serialize + 'a>(
     while items.peek().is_some() {
         let mut writer = TrackedWriter::new();
         let written_count = writer.written_count.clone();
-        let mut serializer = Serializer::new(EncoderWriter::from(&mut writer, &BASE64_ENGINE));
+        let mut serializer = Serializer::new(EncoderWriter::new(&mut writer, base64::STANDARD));
 
         let mut seq = serializer.serialize_seq(None)?;
         #[allow(clippy::while_let_on_iterator)]