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Code Issues Projects Releases Wiki Activity

Optimize use of .unwrap()

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spikecodes 2021-01-01 15:28:13 -08:00
parent 59ef30c76d
commit 2f2ed6169d
5 changed files with 109 additions and 119 deletions
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27
src/post.rs
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@ -24,24 +24,21 @@ pub async fn item(req: HttpRequest) -> Result<HttpResponse> {
// Log the post ID being fetched in debug mode
#[cfg(debug_assertions)]
dbg!(&id);
// Send a request to the url, receive JSON in response
let req = request(&path).await;
// If the Reddit API returns an error, exit and send error page to user
if req.is_err() {
error(req.err().unwrap().to_string()).await
} else {
match request(&path).await {
// Otherwise, grab the JSON output from the request
let res = req.unwrap();
Ok(res) => {
// Parse the JSON into Post and Comment structs
let post = parse_post(&res[0]).await.unwrap();
let comments = parse_comments(&res[1]).await.unwrap();
// Parse the JSON into Post and Comment structs
let post = parse_post(&res[0]).await.unwrap();
let comments = parse_comments(&res[1]).await.unwrap();
// Use the Post and Comment structs to generate a website to show users
let s = PostTemplate { comments, post, sort }.render().unwrap();
Ok(HttpResponse::Ok().content_type("text/html").body(s))
// Use the Post and Comment structs to generate a website to show users
let s = PostTemplate { comments, post, sort }.render().unwrap();
Ok(HttpResponse::Ok().content_type("text/html").body(s))
},
// If the Reddit API returns an error, exit and send error page to user
Err(msg) => error(msg.to_string()).await
}
}

31
src/search.rs
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@ -26,22 +26,19 @@ pub async fn find(req: HttpRequest) -> Result<HttpResponse> {
};
let sub = req.match_info().get("sub").unwrap_or("").to_string();
let posts = fetch_posts(&path, String::new()).await;
if posts.is_err() {
error(posts.err().unwrap().to_string()).await
} else {
let items = posts.unwrap();
let s = SearchTemplate {
posts: items.0,
query: q,
sub,
sort: (sort, param(&path, "t")),
ends: (param(&path, "after"), items.1),
}
.render()
.unwrap();
Ok(HttpResponse::Ok().content_type("text/html").body(s))
match fetch_posts(&path, String::new()).await {
Ok(posts) => {
let s = SearchTemplate {
posts: posts.0,
query: q,
sub,
sort: (sort, param(&path, "t")),
ends: (param(&path, "after"), posts.1),
}
.render()
.unwrap();
Ok(HttpResponse::Ok().content_type("text/html").body(s))
},
Err(msg) => error(msg.to_string()).await
}
}

59
src/subreddit.rs
View File

@ -2,7 +2,6 @@
use crate::utils::{error, fetch_posts, format_num, format_url, param, request, val, Post, Subreddit};
use actix_web::{HttpRequest, HttpResponse, Result};
use askama::Template;
use std::convert::TryInto;
// STRUCTS
#[derive(Template)]
@ -22,49 +21,45 @@ pub async fn page(req: HttpRequest) -> Result<HttpResponse> {
let sort = req.match_info().get("sort").unwrap_or("hot").to_string();
let sub_result = if !&sub.contains('+') && sub != "popular" {
subreddit(&sub).await
subreddit(&sub).await.unwrap_or_default()
} else {
Ok(Subreddit::default())
Subreddit::default()
};
let posts = fetch_posts(&path, String::new()).await;
if posts.is_err() {
error(posts.err().unwrap().to_string()).await
} else {
let sub = sub_result.unwrap_or_default();
let items = posts.unwrap();
let s = SubredditTemplate {
sub,
posts: items.0,
sort: (sort, param(&path, "t")),
ends: (param(&path, "after"), items.1),
}
.render()
.unwrap();
Ok(HttpResponse::Ok().content_type("text/html").body(s))
match fetch_posts(&path, String::new()).await {
Ok(items) => {
let s = SubredditTemplate {
sub: sub_result,
posts: items.0,
sort: (sort, param(&path, "t")),
ends: (param(&path, "after"), items.1),
}
.render()
.unwrap();
Ok(HttpResponse::Ok().content_type("text/html").body(s))
},
Err(msg) => error(msg.to_string()).await
}
}
// SUBREDDIT
async fn subreddit(sub: &str) -> Result<Subreddit, &'static str> {
// Build the Reddit JSON API url
let url: String = format!("r/{}/about.json?raw_json=1", sub);
let path: String = format!("r/{}/about.json?raw_json=1", sub);
// Send a request to the url, receive JSON in response
let req = request(&url).await;
let res;
// If the Reddit API returns an error, exit this function
if req.is_err() {
return Err(req.err().unwrap());
// Send a request to the url
match request(&path).await {
// If success, receive JSON in response
Ok(response) => { res = response; },
// If the Reddit API returns an error, exit this function
Err(msg) => return Err(msg)
}
// Otherwise, grab the JSON output from the request
let res = req.unwrap();
// Metadata regarding the subreddit
let members = res["data"]["subscribers"].as_u64().unwrap_or(0);
let active = res["data"]["accounts_active"].as_u64().unwrap_or(0);
let members: i64 = res["data"]["subscribers"].as_u64().unwrap_or_default() as i64;
let active: i64 = res["data"]["accounts_active"].as_u64().unwrap_or_default() as i64;
// Fetch subreddit icon either from the community_icon or icon_img value
let community_icon: &str = res["data"]["community_icon"].as_str().unwrap_or("").split('?').collect::<Vec<&str>>()[0];
@ -76,8 +71,8 @@ async fn subreddit(sub: &str) -> Result<Subreddit, &'static str> {
description: val(&res, "public_description"),
info: val(&res, "description_html").replace("\\", ""),
icon: format_url(icon).await,
members: format_num(members.try_into().unwrap_or(0)),
active: format_num(active.try_into().unwrap_or(0)),
members: format_num(members),
active: format_num(active),
};
Ok(sub)

46
src/user.rs
View File

@ -25,22 +25,21 @@ pub async fn profile(req: HttpRequest) -> Result<HttpResponse> {
// Request user profile data and user posts/comments from Reddit
let user = user(&username).await;
let posts = fetch_posts(&path, "Comment".to_string()).await;
// If there is an error show error page
if user.is_err() || posts.is_err() {
error(user.err().unwrap().to_string()).await
} else {
let posts_unwrapped = posts.unwrap();
let s = UserTemplate {
user: user.unwrap(),
posts: posts_unwrapped.0,
sort: (sort, param(&path, "t")),
ends: (param(&path, "after"), posts_unwrapped.1),
}
.render()
.unwrap();
Ok(HttpResponse::Ok().content_type("text/html").body(s))
match posts {
Ok(items) => {
let s = UserTemplate {
user: user.unwrap(),
posts: items.0,
sort: (sort, param(&path, "t")),
ends: (param(&path, "after"), items.1),
}
.render()
.unwrap();
Ok(HttpResponse::Ok().content_type("text/html").body(s))
},
// If there is an error show error page
Err(msg) => error(msg.to_string()).await
}
}
@ -49,17 +48,16 @@ async fn user(name: &str) -> Result<User, &'static str> {
// Build the Reddit JSON API path
let path: String = format!("user/{}/about.json", name);
// Send a request to the url, receive JSON in response
let req = request(&path).await;
let res;
// If the Reddit API returns an error, exit this function
if req.is_err() {
return Err(req.err().unwrap());
// Send a request to the url
match request(&path).await {
// If success, receive JSON in response
Ok(response) => { res = response; },
// If the Reddit API returns an error, exit this function
Err(msg) => return Err(msg)
}
// Otherwise, grab the JSON output from the request
let res = req.unwrap();
// Grab creation date as unix timestamp
let created: i64 = res["data"]["created"].as_f64().unwrap().round() as i64;

65
src/utils.rs
View File

@ -4,7 +4,7 @@
use actix_web::{http::StatusCode, HttpResponse, Result};
use askama::Template;
use chrono::{TimeZone, Utc};
use serde_json::{from_str, Value};
use serde_json::{from_str};
use url::Url;
// use surf::{client, get, middleware::Redirect};
@ -135,24 +135,27 @@ pub fn val(j: &serde_json::Value, k: &str) -> String {
// nested_val() function used to parse JSON from Reddit APIs
pub fn nested_val(j: &serde_json::Value, n: &str, k: &str) -> String {
String::from(j["data"][n][k].as_str().unwrap())
String::from(j["data"][n][k].as_str().unwrap_or_default())
}
// Fetch posts of a user or subreddit
pub async fn fetch_posts(path: &str, fallback_title: String) -> Result<(Vec<Post>, String), &'static str> {
// Send a request to the url, receive JSON in response
let req = request(path).await;
let res;
let post_list;
// If the Reddit API returns an error, exit this function
if req.is_err() {
return Err(req.err().unwrap());
// Send a request to the url
match request(&path).await {
// If success, receive JSON in response
Ok(response) => { res = response; },
// If the Reddit API returns an error, exit this function
Err(msg) => return Err(msg)
}
// 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();
match res["data"]["children"].as_array() {
Some(list) => { post_list = list },
None => { return Err("No posts found") }
}
let mut posts: Vec<Post> = Vec::new();
@ -162,8 +165,8 @@ pub async fn fetch_posts(path: &str, fallback_title: String) -> Result<(Vec<Post
} else {
String::new()
};
let unix_time: i64 = post["data"]["created_utc"].as_f64().unwrap().round() as i64;
let score = post["data"]["score"].as_i64().unwrap();
let unix_time: i64 = post["data"]["created_utc"].as_f64().unwrap_or_default().round() as i64;
let score = post["data"]["score"].as_i64().unwrap_or_default();
let title = val(post, "title");
posts.push(Post {
@ -206,7 +209,7 @@ pub async fn fetch_posts(path: &str, fallback_title: String) -> Result<(Vec<Post
pub async fn error(message: String) -> Result<HttpResponse> {
let msg = if message.is_empty() { "Page not found".to_string() } else { message };
let body = ErrorTemplate { message: msg }.render().unwrap();
let body = ErrorTemplate { message: msg }.render().unwrap_or_default();
Ok(HttpResponse::Ok().status(StatusCode::NOT_FOUND).content_type("text/html").body(body))
}
@ -236,22 +239,22 @@ pub async fn request(path: &str) -> Result<serde_json::Value, &'static str> {
// --- reqwest ---
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: Value = from_str(body.as_str()).unwrap_or(Value::Null);
if !success {
#[cfg(debug_assertions)]
dbg!(format!("{} - Page not found", url));
Err("Page not found")
} else if json == Value::Null {
#[cfg(debug_assertions)]
dbg!(format!("{} - Failed to parse page JSON data", url));
Err("Failed to parse page JSON data")
} else {
Ok(json)
match res.status().is_success() {
true => {
// Parse the response from Reddit as JSON
match from_str(res.text().await.unwrap_or_default().as_str()) {
Ok(json) => Ok(json),
Err(_) => {
#[cfg(debug_assertions)]
dbg!(format!("{} - Failed to parse page JSON data", url));
Err("Failed to parse page JSON data")
}
}
},
false => {
#[cfg(debug_assertions)]
dbg!(format!("{} - Page not found", url));
Err("Page not found")
}
}
}