Error Pages

Cargo.lock

@@ -958,9 +958,9 @@ dependencies = [
 
 [[package]]
 name = "instant"
-version = "0.1.8"
+version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cb1fc4429a33e1f80d41dc9fea4d108a88bec1de8053878898ae448a0b52f613"
+checksum = "61124eeebbd69b8190558df225adf7e4caafce0d743919e5d6b19652314ec5ec"
 dependencies = [
  "cfg-if 1.0.0",
 ]

src/popular.rs

@@ -8,7 +8,7 @@ use subreddit::{posts, Post};
 
 #[path = "utils.rs"]
 mod utils;
-use utils::Params;
+use utils::{ErrorTemplate, Params};
 
 // STRUCTS
 #[derive(Template)]
@@ -33,16 +33,27 @@ async fn render(sub_name: String, sort: Option<String>, ends: (Option<String>, O
 		},
 	};
 
-	let items = posts(url).await?;
+	let items_result = posts(url).await;
 
-	let s = PopularTemplate {
-		posts: items.0,
-		sort: sorting,
-		ends: (before, items.1),
+	if items_result.is_err() {
+		let s = ErrorTemplate {
+			message: items_result.err().unwrap().to_string(),
+		}
+		.render()
+		.unwrap();
+		Ok(HttpResponse::Ok().content_type("text/html").body(s))
+	} else {
+		let items = items_result.unwrap();
+
+		let s = PopularTemplate {
+			posts: items.0,
+			sort: sorting,
+			ends: (before, items.1),
+		}
+		.render()
+		.unwrap();
+		Ok(HttpResponse::Ok().content_type("text/html").body(s))
 	}
-	.render()
-	.unwrap();
-	Ok(HttpResponse::Ok().content_type("text/html").body(s))
 }
 
 // SERVICES

src/post.rs

@@ -6,7 +6,7 @@ use pulldown_cmark::{html, Options, Parser};
 
 #[path = "utils.rs"]
 mod utils;
-use utils::{request, val, Comment, Flair, Params, Post};
+use utils::{request, val, Comment, ErrorTemplate, Flair, Params, Post};
 
 // STRUCTS
 #[derive(Template)]
@@ -19,20 +19,26 @@ struct PostTemplate {
 
 async fn render(id: String, sort: String) -> Result<HttpResponse> {
 	println!("id: {}", id);
-	let post: Post = fetch_post(&id).await?;
-	let comments: Vec<Comment> = fetch_comments(id, &sort).await?;
+	let post = fetch_post(&id).await;
+	let comments = fetch_comments(id, &sort).await;
 
-	let s = PostTemplate {
-		comments: comments,
-		post: post,
-		sort: sort,
+	if post.is_err() || comments.is_err() {
+		let s = ErrorTemplate {
+			message: post.err().unwrap().to_string(),
+		}
+		.render()
+		.unwrap();
+		Ok(HttpResponse::Ok().content_type("text/html").body(s))
+	} else {
+		let s = PostTemplate {
+			comments: comments.unwrap(),
+			post: post.unwrap(),
+			sort: sort,
+		}
+		.render()
+		.unwrap();
+		Ok(HttpResponse::Ok().content_type("text/html").body(s))
 	}
-	.render()
-	.unwrap();
-
-	// println!("{}", s);
-
-	Ok(HttpResponse::Ok().content_type("text/html").body(s))
 }
 
 // SERVICES
@@ -86,12 +92,20 @@ async fn markdown_to_html(md: &str) -> String {
 }
 
 // POSTS
-async fn fetch_post(id: &String) -> Result<Post> {
+async fn fetch_post(id: &String) -> Result<Post, &'static str> {
 	// Build the Reddit JSON API url
 	let url: String = format!("https://reddit.com/{}.json", id);
 
 	// Send a request to the url, receive JSON in response
-	let res = request(url).await;
+	let req = request(url).await;
+
+	// If the Reddit API returns an error, exit this function
+	if req.is_err() {
+		return Err(req.err().unwrap());
+	}
+
+	// Otherwise, grab the JSON output from the request
+	let res = req.unwrap();
 
 	let post_data: &serde_json::Value = &res[0]["data"]["children"][0];
 
@@ -122,12 +136,20 @@ async fn fetch_post(id: &String) -> Result<Post> {
 }
 
 // COMMENTS
-async fn fetch_comments(id: String, sort: &String) -> Result<Vec<Comment>> {
+async fn fetch_comments(id: String, sort: &String) -> Result<Vec<Comment>, &'static str> {
 	// Build the Reddit JSON API url
 	let url: String = format!("https://reddit.com/{}.json?sort={}", id, sort);
 
 	// Send a request to the url, receive JSON in response
-	let res = request(url).await;
+	let req = request(url).await;
+
+	// If the Reddit API returns an error, exit this function
+	if req.is_err() {
+		return Err(req.err().unwrap());
+	}
+
+	// Otherwise, grab the JSON output from the request
+	let res = req.unwrap();
 
 	let comment_data = res[1]["data"]["children"].as_array().unwrap();
 

src/subreddit.rs

@@ -5,7 +5,7 @@ use chrono::{TimeZone, Utc};
 
 #[path = "utils.rs"]
 mod utils;
-pub use utils::{request, val, Flair, Params, Post, Subreddit};
+pub use utils::{request, val, ErrorTemplate, Flair, Params, Post, Subreddit};
 
 // STRUCTS
 #[derive(Template)]
@@ -37,33 +37,53 @@ pub async fn render(sub_name: String, sort: Option<String>, ends: (Option<String
 		},
 	};
 
-	let mut sub: Subreddit = subreddit(&sub_name).await?;
-	let items = posts(url).await?;
+	let sub_result = subreddit(&sub_name).await;
+	let items_result = posts(url).await;
 
-	sub.icon = if sub.icon != "" {
-		format!(r#"<img class="subreddit_icon" src="{}">"#, sub.icon)
+	if sub_result.is_err() || items_result.is_err() {
+		let s = ErrorTemplate {
+			message: sub_result.err().unwrap().to_string(),
+		}
+		.render()
+		.unwrap();
+		Ok(HttpResponse::Ok().content_type("text/html").body(s))
 	} else {
-		String::new()
-	};
+		let mut sub = sub_result.unwrap();
+		let items = items_result.unwrap();
 
-	let s = SubredditTemplate {
-		sub: sub,
-		posts: items.0,
-		sort: sorting,
-		ends: (before, items.1),
+		sub.icon = if sub.icon != "" {
+			format!(r#"<img class="subreddit_icon" src="{}">"#, sub.icon)
+		} else {
+			String::new()
+		};
+
+		let s = SubredditTemplate {
+			sub: sub,
+			posts: items.0,
+			sort: sorting,
+			ends: (before, items.1),
+		}
+		.render()
+		.unwrap();
+		Ok(HttpResponse::Ok().content_type("text/html").body(s))
 	}
-	.render()
-	.unwrap();
-	Ok(HttpResponse::Ok().content_type("text/html").body(s))
 }
 
 // SUBREDDIT
-async fn subreddit(sub: &String) -> Result<Subreddit> {
+async fn subreddit(sub: &String) -> Result<Subreddit, &'static str> {
 	// Build the Reddit JSON API url
 	let url: String = format!("https://www.reddit.com/r/{}/about.json", sub);
 
 	// Send a request to the url, receive JSON in response
-	let res = request(url).await;
+	let req = request(url).await;
+
+	// If the Reddit API returns an error, exit this function
+	if req.is_err() {
+		return Err(req.err().unwrap());
+	}
+
+	// Otherwise, grab the JSON output from the request
+	let res = req.unwrap();
 
 	let icon: String = String::from(res["data"]["community_icon"].as_str().unwrap()); //val(&data, "community_icon");
 	let icon_split: std::str::Split<&str> = icon.split("?");
@@ -80,9 +100,17 @@ async fn subreddit(sub: &String) -> Result<Subreddit> {
 }
 
 // POSTS
-pub async fn posts(url: String) -> Result<(Vec<Post>, String)> {
+pub async fn posts(url: String) -> Result<(Vec<Post>, String), &'static str> {
 	// Send a request to the url, receive JSON in response
-	let res = request(url).await;
+	let req = request(url).await;
+
+	// If the Reddit API returns an error, exit this function
+	if req.is_err() {
+		return Err(req.err().unwrap());
+	}
+
+	// Otherwise, grab the JSON output from the request
+	let res = req.unwrap();
 
 	// Fetch the list of posts from the JSON response
 	let post_list = res["data"]["children"].as_array().unwrap();

src/user.rs

@@ -5,7 +5,7 @@ use chrono::{TimeZone, Utc};
 
 #[path = "utils.rs"]
 mod utils;
-use utils::{nested_val, request, val, Flair, Params, Post, User};
+use utils::{nested_val, request, val, ErrorTemplate, Flair, Params, Post, User};
 
 // STRUCTS
 #[derive(Template)]
@@ -17,11 +17,26 @@ struct UserTemplate {
 }
 
 async fn render(username: String, sort: String) -> Result<HttpResponse> {
-	let user: User = user(&username).await;
-	let posts: Vec<Post> = posts(username, &sort).await;
+	let user = user(&username).await;
+	let posts = posts(username, &sort).await;
 
-	let s = UserTemplate { user: user, posts: posts, sort: sort }.render().unwrap();
-	Ok(HttpResponse::Ok().content_type("text/html").body(s))
+	if user.is_err() || posts.is_err() {
+		let s = ErrorTemplate {
+			message: user.err().unwrap().to_string(),
+		}
+		.render()
+		.unwrap();
+		Ok(HttpResponse::Ok().content_type("text/html").body(s))
+	} else {
+		let s = UserTemplate {
+			user: user.unwrap(),
+			posts: posts.unwrap(),
+			sort: sort,
+		}
+		.render()
+		.unwrap();
+		Ok(HttpResponse::Ok().content_type("text/html").body(s))
+	}
 }
 
 // SERVICES
@@ -34,29 +49,46 @@ async fn page(web::Path(username): web::Path<String>, params: web::Query<Params>
 }
 
 // USER
-async fn user(name: &String) -> User {
+async fn user(name: &String) -> Result<User, &'static str> {
 	// Build the Reddit JSON API url
 	let url: String = format!("https://www.reddit.com/user/{}/about.json", name);
 
 	// Send a request to the url, receive JSON in response
-	let res = request(url).await;
+	let req = request(url).await;
 
-	User {
+	// If the Reddit API returns an error, exit this function
+	if req.is_err() {
+		return Err(req.err().unwrap());
+	}
+
+	// Otherwise, grab the JSON output from the request
+	let res = req.unwrap();
+
+	// Parse the JSON output into a User struct
+	Ok(User {
 		name: name.to_string(),
 		icon: nested_val(&res, "subreddit", "icon_img").await,
 		karma: res["data"]["total_karma"].as_i64().unwrap(),
 		banner: nested_val(&res, "subreddit", "banner_img").await,
 		description: nested_val(&res, "subreddit", "public_description").await,
-	}
+	})
 }
 
 // POSTS
-async fn posts(sub: String, sort: &String) -> Vec<Post> {
+async fn posts(sub: String, sort: &String) -> Result<Vec<Post>, &'static str> {
 	// Build the Reddit JSON API url
 	let url: String = format!("https://www.reddit.com/u/{}/.json?sort={}", sub, sort);
 
 	// Send a request to the url, receive JSON in response
-	let res = request(url).await;
+	let req = request(url).await;
+
+	// If the Reddit API returns an error, exit this function
+	if req.is_err() {
+		return Err(req.err().unwrap());
+	}
+
+	// Otherwise, grab the JSON output from the request
+	let res = req.unwrap();
 
 	let post_list = res["data"]["children"].as_array().unwrap();
 
@@ -93,5 +125,5 @@ async fn posts(sub: String, sort: &String) -> Vec<Post> {
 		});
 	}
 
-	posts
+	Ok(posts)
 }

src/utils.rs

@@ -1,3 +1,6 @@
+//
+// STRUCTS
+//
 #[allow(dead_code)]
 // Post flair with text, background color and foreground color
 pub struct Flair(pub String, pub String, pub String);
@@ -52,6 +55,17 @@ pub struct Params {
 	pub before: Option<String>,
 }
 
+// Error template
+#[derive(askama::Template)]
+#[template(path = "error.html", escape = "none")]
+pub struct ErrorTemplate {
+	pub message: String,
+}
+
+//
+// JSON PARSING
+//
+
 #[allow(dead_code)]
 // val() function used to parse JSON from Reddit APIs
 pub async fn val(j: &serde_json::Value, k: &str) -> String {
@@ -64,9 +78,13 @@ pub async fn nested_val(j: &serde_json::Value, n: &str, k: &str) -> String {
 	String::from(j["data"][n][k].as_str().unwrap())
 }
 
+//
+// NETWORKING
+//
+
 // Make a request to a Reddit API and parse the JSON response
 #[allow(dead_code)]
-pub async fn request(url: String) -> serde_json::Value {
+pub async fn request(url: String) -> Result<serde_json::Value, &'static str> {
 	// --- actix-web::client ---
 	// let client = actix_web::client::Client::default();
 	// let res = client
@@ -86,10 +104,22 @@ pub async fn request(url: String) -> serde_json::Value {
 	// let body = res.body_string().await.unwrap();
 
 	// --- reqwest ---
-	let resp: String = reqwest::get(&url).await.unwrap().text().await.unwrap();
+	let res = reqwest::get(&url).await.unwrap();
+	// Read the status from the response
+	let success = res.status().is_success();
+	// Read the body of the response
+	let body = res.text().await.unwrap();
 
 	// Parse the response from Reddit as JSON
-	let json: serde_json::Value = serde_json::from_str(resp.as_str()).expect("Failed to parse JSON");
+	let json: serde_json::Value = serde_json::from_str(body.as_str()).unwrap_or(serde_json::Value::Null);
 
-	json
+	if !success {
+		Ok(json)
+	} else if json == serde_json::Value::Null {
+		println!("! {} - {}", url, "Failed to parse page JSON data");
+		Err("Failed to parse page JSON data")
+	} else {
+		println!("! {} - {}", url, "Page not found");
+		Err("Page not found")
+	}
 }

templates/error.html

@@ -0,0 +1,18 @@
+<!DOCTYPE html>
+<html lang="en">
+	<head>
+		<title>Page not found.</title>
+		<meta name="description" content="View on Libreddit, an alternative private front-end to Reddit.">
+		<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
+		<link rel="stylesheet" href="/style.css">
+	</head>
+<body>
+	<header>
+		<a href="/"><span style="color:white">lib</span>reddit.</a>
+		<a style="color:white" href="https://github.com/spikecodes/libreddit">GITHUB</a>
+	</header>
+	<main>
+		<h1 style="text-align: center; font-size: 50px;">{{ message }}</h1>
+	</main>
+</body>
+</html>