TLA Line data Source code
1 : use core::fmt;
2 : use std::{borrow::Cow, str::FromStr};
3 :
4 : use super::error::ApiError;
5 : use anyhow::anyhow;
6 : use hyper::{body::HttpBody, Body, Request};
7 : use routerify::ext::RequestExt;
8 :
9 CBC 16249 : pub fn get_request_param<'a>(
10 16249 : request: &'a Request<Body>,
11 16249 : param_name: &str,
12 16249 : ) -> Result<&'a str, ApiError> {
13 16249 : match request.param(param_name) {
14 16249 : Some(arg) => Ok(arg),
15 UBC 0 : None => Err(ApiError::BadRequest(anyhow!(
16 0 : "no {param_name} specified in path param",
17 0 : ))),
18 : }
19 CBC 16249 : }
20 :
21 14002 : pub fn parse_request_param<T: FromStr>(
22 14002 : request: &Request<Body>,
23 14002 : param_name: &str,
24 14002 : ) -> Result<T, ApiError> {
25 14002 : match get_request_param(request, param_name)?.parse() {
26 14002 : Ok(v) => Ok(v),
27 UBC 0 : Err(_) => Err(ApiError::BadRequest(anyhow!(
28 0 : "failed to parse {param_name}",
29 0 : ))),
30 : }
31 CBC 14002 : }
32 :
33 3521 : fn get_query_param<'a>(
34 3521 : request: &'a Request<Body>,
35 3521 : param_name: &str,
36 3521 : ) -> Result<Option<Cow<'a, str>>, ApiError> {
37 3521 : let query = match request.uri().query() {
38 230 : Some(q) => q,
39 3291 : None => return Ok(None),
40 : };
41 230 : let mut values = url::form_urlencoded::parse(query.as_bytes())
42 359 : .filter_map(|(k, v)| if k == param_name { Some(v) } else { None })
43 230 : // we call .next() twice below. If it's None the first time, .fuse() ensures it's None afterwards
44 230 : .fuse();
45 230 :
46 230 : let value1 = values.next();
47 230 : if values.next().is_some() {
48 UBC 0 : return Err(ApiError::BadRequest(anyhow!(
49 0 : "param {param_name} specified more than once"
50 0 : )));
51 CBC 230 : }
52 230 : Ok(value1)
53 3521 : }
54 :
55 25 : pub fn must_get_query_param<'a>(
56 25 : request: &'a Request<Body>,
57 25 : param_name: &str,
58 25 : ) -> Result<Cow<'a, str>, ApiError> {
59 25 : get_query_param(request, param_name)?.ok_or_else(|| {
60 UBC 0 : ApiError::BadRequest(anyhow!("no {param_name} specified in query parameters"))
61 CBC 25 : })
62 25 : }
63 :
64 3496 : pub fn parse_query_param<E: fmt::Display, T: FromStr<Err = E>>(
65 3496 : request: &Request<Body>,
66 3496 : param_name: &str,
67 3496 : ) -> Result<Option<T>, ApiError> {
68 3496 : get_query_param(request, param_name)?
69 3496 : .map(|v| {
70 190 : v.parse().map_err(|e| {
71 UBC 0 : ApiError::BadRequest(anyhow!("cannot parse query param {param_name}: {e}"))
72 CBC 190 : })
73 3496 : })
74 3496 : .transpose()
75 3496 : }
76 :
77 20 : pub async fn ensure_no_body(request: &mut Request<Body>) -> Result<(), ApiError> {
78 20 : match request.body_mut().data().await {
79 UBC 0 : Some(_) => Err(ApiError::BadRequest(anyhow!("Unexpected request body"))),
80 CBC 20 : None => Ok(()),
81 : }
82 20 : }
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