mirror of
https://github.com/mimblewimble/grin.git
synced 2025-01-21 11:31:08 +03:00
191 lines
4.6 KiB
Rust
191 lines
4.6 KiB
Rust
use crate::rest::*;
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use crate::router::ResponseFuture;
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use futures::future::{err, ok};
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use futures::{Future, Stream};
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use hyper::{Body, Request, Response, StatusCode};
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use serde::{Deserialize, Serialize};
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use serde_json;
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use std::collections::HashMap;
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use std::fmt::Debug;
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use url::form_urlencoded;
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/// Parse request body
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pub fn parse_body<T>(req: Request<Body>) -> Box<dyn Future<Item = T, Error = Error> + Send>
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where
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for<'de> T: Deserialize<'de> + Send + 'static,
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{
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Box::new(
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req.into_body()
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.concat2()
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.map_err(|e| ErrorKind::RequestError(format!("Failed to read request: {}", e)).into())
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.and_then(|body| match serde_json::from_reader(&body.to_vec()[..]) {
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Ok(obj) => ok(obj),
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Err(e) => {
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err(ErrorKind::RequestError(format!("Invalid request body: {}", e)).into())
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}
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}),
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)
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}
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/// Convert Result to ResponseFuture
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pub fn result_to_response<T>(res: Result<T, Error>) -> ResponseFuture
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where
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T: Serialize,
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{
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match res {
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Ok(s) => json_response_pretty(&s),
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Err(e) => match e.kind() {
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ErrorKind::Argument(msg) => response(StatusCode::BAD_REQUEST, msg.clone()),
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ErrorKind::RequestError(msg) => response(StatusCode::BAD_REQUEST, msg.clone()),
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ErrorKind::NotFound => response(StatusCode::NOT_FOUND, ""),
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ErrorKind::Internal(msg) => response(StatusCode::INTERNAL_SERVER_ERROR, msg.clone()),
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ErrorKind::ResponseError(msg) => {
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response(StatusCode::INTERNAL_SERVER_ERROR, msg.clone())
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}
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},
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}
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}
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/// Utility to serialize a struct into JSON and produce a sensible Response
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/// out of it.
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pub fn json_response<T>(s: &T) -> ResponseFuture
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where
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T: Serialize,
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{
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match serde_json::to_string(s) {
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Ok(json) => response(StatusCode::OK, json),
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Err(_) => response(StatusCode::INTERNAL_SERVER_ERROR, ""),
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}
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}
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/// Pretty-printed version of json response as future
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pub fn json_response_pretty<T>(s: &T) -> ResponseFuture
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where
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T: Serialize,
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{
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match serde_json::to_string_pretty(s) {
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Ok(json) => response(StatusCode::OK, json),
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Err(e) => response(
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StatusCode::INTERNAL_SERVER_ERROR,
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format!("can't create json response: {}", e),
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),
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}
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}
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/// Text response as HTTP response
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pub fn just_response<T: Into<Body> + Debug>(status: StatusCode, text: T) -> Response<Body> {
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let mut resp = Response::new(text.into());
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*resp.status_mut() = status;
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resp
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}
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/// Text response as future
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pub fn response<T: Into<Body> + Debug>(status: StatusCode, text: T) -> ResponseFuture {
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Box::new(ok(just_response(status, text)))
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}
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pub struct QueryParams {
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params: HashMap<String, Vec<String>>,
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}
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impl QueryParams {
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pub fn process_multival_param<F>(&self, name: &str, mut f: F)
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where
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F: FnMut(&str),
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{
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if let Some(ids) = self.params.get(name) {
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for id in ids {
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for id in id.split(',') {
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f(id);
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}
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}
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}
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}
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pub fn get(&self, name: &str) -> Option<&String> {
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match self.params.get(name) {
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None => None,
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Some(v) => v.first(),
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}
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}
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}
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impl From<&str> for QueryParams {
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fn from(query_string: &str) -> Self {
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let params = form_urlencoded::parse(query_string.as_bytes())
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.into_owned()
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.fold(HashMap::new(), |mut hm, (k, v)| {
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hm.entry(k).or_insert(vec![]).push(v);
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hm
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});
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QueryParams { params }
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}
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}
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impl From<Option<&str>> for QueryParams {
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fn from(query_string: Option<&str>) -> Self {
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match query_string {
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Some(query_string) => Self::from(query_string),
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None => QueryParams {
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params: HashMap::new(),
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},
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}
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}
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}
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impl From<Request<Body>> for QueryParams {
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fn from(req: Request<Body>) -> Self {
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Self::from(req.uri().query())
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}
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}
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#[macro_export]
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macro_rules! right_path_element(
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($req: expr) =>(
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match $req.uri().path().trim_end_matches('/').rsplit('/').next() {
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None => return response(StatusCode::BAD_REQUEST, "invalid url"),
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Some(el) => el,
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};
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));
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#[macro_export]
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macro_rules! must_get_query(
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($req: expr) =>(
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match $req.uri().query() {
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Some(q) => q,
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None => return Err(ErrorKind::RequestError("no query string".to_owned()))?,
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}
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));
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#[macro_export]
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macro_rules! parse_param(
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($param: expr, $name: expr, $default: expr) =>(
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match $param.get($name) {
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None => $default,
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Some(val) => match val.parse() {
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Ok(val) => val,
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Err(_) => return Err(ErrorKind::RequestError(format!("invalid value of parameter {}", $name)))?,
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}
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}
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));
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#[macro_export]
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macro_rules! parse_param_no_err(
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($param: expr, $name: expr, $default: expr) =>(
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match $param.get($name) {
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None => $default,
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Some(val) => match val.parse() {
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Ok(val) => val,
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Err(_) => $default,
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}
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}
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));
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#[macro_export]
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macro_rules! w_fut(
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($p: expr) =>(
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match w($p) {
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Ok(p) => p,
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Err(_) => return response(StatusCode::INTERNAL_SERVER_ERROR, "weak reference upgrade failed" ),
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}
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));
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