og-image: Handle 404 errors from avatar downloads gracefully

Some of our users appear to have avatar URLs like `https://private-avatars.githubusercontent.com/u/123095?jwt=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJpc3MiOiJnaXRodWIuY29tIiwiYXVkIjoicmF3LmdpdGh1YnVzZXJjb250ZW50LmNvbSIsImtleSI6ImtleTEiLCJleHAiOjE3MzQ1MjkwMjAsIm5iZiI6MTczNDUyNzgyMCwicGF0aCI6Ii91LzEyMzA5NSJ9.qPHLwlZHda1ApuLzL5FfADxTiOsNjpp85IGvljRx9bM&v=4&s=64` which result in 404 errors when attempting to download them. This commit adjusts the code to log a warning in such cases and then show the author name without an avatar instead.

Author: Turbo87

crates/crates_io_og_image/src/lib.rs

@@ -8,6 +8,7 @@ pub use error::OgImageError;
 use crate::formatting::{serialize_bytes, serialize_number, serialize_optional_number};
 use bytes::Bytes;
 use crates_io_env_vars::var;
+use reqwest::StatusCode;
 use serde::Serialize;
 use std::collections::HashMap;
 use std::path::{Path, PathBuf};
@@ -252,19 +253,25 @@ impl OgImageGenerator {
                 } else {
                     debug!(url = %avatar, "Downloading avatar from URL: {avatar}");
                     // Download the avatar from the URL
-                    let response = client
-                        .get(*avatar)
-                        .send()
-                        .await
-                        .map_err(|err| OgImageError::AvatarDownloadError {
+                    let response = client.get(*avatar).send().await.map_err(|err| {
+                        OgImageError::AvatarDownloadError {
                             url: avatar.to_string(),
                             source: err,
-                        })?
-                        .error_for_status()
-                        .map_err(|err| OgImageError::AvatarDownloadError {
+                        }
+                    })?;
+
+                    let status = response.status();
+                    if status == StatusCode::NOT_FOUND {
+                        warn!(url = %avatar, "Avatar URL returned 404 Not Found");
+                        continue; // Skip this avatar if not found
+                    }
+
+                    if let Err(err) = response.error_for_status_ref() {
+                        return Err(OgImageError::AvatarDownloadError {
                             url: avatar.to_string(),
                             source: err,
-                        })?;
+                        });
+                    }
 
                     let content_length = response.content_length();
                     debug!(

crates/crates_io_og_image/template/og-image.typ

@@ -283,7 +283,10 @@
             let authors-with-avatars = data.authors.map(author => {
                 let avatar = none
                 if author.avatar != none {
-                    avatar = "assets/" + avatar_map.at(author.avatar)
+                    let avatar_path = avatar_map.at(author.avatar, default: none)
+                    if avatar_path != none {
+                        avatar = "assets/" + avatar_path
+                    }
                 }
                 (name: author.name, avatar: avatar)
             })