2018-11-03 09:46:12 +03:00
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// Copyright 2018 The Grin Developers
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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use super::utils::{get_output, w};
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2018-12-08 02:59:40 +03:00
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use crate::chain;
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use crate::core::core::hash::Hashed;
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use crate::rest::*;
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use crate::router::{Handler, ResponseFuture};
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use crate::types::*;
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use crate::util;
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use crate::util::secp::pedersen::Commitment;
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use crate::web::*;
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2018-11-03 09:46:12 +03:00
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use hyper::{Body, Request, StatusCode};
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use std::collections::HashMap;
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use std::sync::Weak;
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use url::form_urlencoded;
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/// Chain handler. Get the head details.
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/// GET /v1/chain
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pub struct ChainHandler {
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pub chain: Weak<chain::Chain>,
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}
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impl ChainHandler {
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fn get_tip(&self) -> Result<Tip, Error> {
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let head = w(&self.chain)
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.head()
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.map_err(|e| ErrorKind::Internal(format!("can't get head: {}", e)))?;
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Ok(Tip::from_tip(head))
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}
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}
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impl Handler for ChainHandler {
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fn get(&self, _req: Request<Body>) -> ResponseFuture {
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result_to_response(self.get_tip())
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}
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}
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/// Chain validation handler.
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/// GET /v1/chain/validate
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pub struct ChainValidationHandler {
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pub chain: Weak<chain::Chain>,
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}
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impl Handler for ChainValidationHandler {
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fn get(&self, _req: Request<Body>) -> ResponseFuture {
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match w(&self.chain).validate(true) {
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2019-02-11 21:54:21 +03:00
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Ok(_) => response(StatusCode::OK, "{}"),
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2018-11-03 09:46:12 +03:00
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Err(e) => response(
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StatusCode::INTERNAL_SERVER_ERROR,
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format!("validate failed: {}", e),
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),
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}
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}
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}
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/// Chain compaction handler. Trigger a compaction of the chain state to regain
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/// storage space.
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/// POST /v1/chain/compact
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pub struct ChainCompactHandler {
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pub chain: Weak<chain::Chain>,
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}
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impl Handler for ChainCompactHandler {
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fn post(&self, _req: Request<Body>) -> ResponseFuture {
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match w(&self.chain).compact() {
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2019-02-11 21:54:21 +03:00
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Ok(_) => response(StatusCode::OK, "{}"),
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2018-11-03 09:46:12 +03:00
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Err(e) => response(
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StatusCode::INTERNAL_SERVER_ERROR,
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format!("compact failed: {}", e),
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),
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}
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}
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}
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// Supports retrieval of multiple outputs in a single request -
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// GET /v1/chain/outputs/byids?id=xxx,yyy,zzz
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// GET /v1/chain/outputs/byids?id=xxx&id=yyy&id=zzz
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// GET /v1/chain/outputs/byheight?start_height=101&end_height=200
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pub struct OutputHandler {
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pub chain: Weak<chain::Chain>,
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}
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impl OutputHandler {
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fn get_output(&self, id: &str) -> Result<Output, Error> {
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let res = get_output(&self.chain, id)?;
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Ok(res.0)
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}
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fn outputs_by_ids(&self, req: &Request<Body>) -> Result<Vec<Output>, Error> {
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let mut commitments: Vec<String> = vec![];
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let query = 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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let params = form_urlencoded::parse(query.as_bytes())
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.into_owned()
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.collect::<Vec<(String, String)>>();
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for (k, id) in params {
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if k == "id" {
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2019-01-20 21:14:36 +03:00
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for id in id.split(',') {
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2018-11-03 09:46:12 +03:00
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commitments.push(id.to_owned());
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}
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}
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}
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let mut outputs: Vec<Output> = vec![];
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for x in commitments {
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if let Ok(output) = self.get_output(&x) {
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outputs.push(output);
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}
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}
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Ok(outputs)
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}
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fn outputs_at_height(
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&self,
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block_height: u64,
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commitments: Vec<Commitment>,
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include_proof: bool,
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) -> Result<BlockOutputs, Error> {
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let header = w(&self.chain)
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.get_header_by_height(block_height)
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.map_err(|_| ErrorKind::NotFound)?;
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// TODO - possible to compact away blocks we care about
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// in the period between accepting the block and refreshing the wallet
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let block = w(&self.chain)
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.get_block(&header.hash())
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.map_err(|_| ErrorKind::NotFound)?;
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let outputs = block
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.outputs()
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.iter()
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.filter(|output| commitments.is_empty() || commitments.contains(&output.commit))
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.map(|output| {
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OutputPrintable::from_output(output, w(&self.chain), Some(&header), include_proof)
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})
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.collect();
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Ok(BlockOutputs {
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header: BlockHeaderInfo::from_header(&header),
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outputs: outputs,
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})
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}
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// returns outputs for a specified range of blocks
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fn outputs_block_batch(&self, req: &Request<Body>) -> Result<Vec<BlockOutputs>, Error> {
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let mut commitments: Vec<Commitment> = vec![];
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let mut start_height = 1;
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let mut end_height = 1;
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let mut include_rp = false;
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let query = 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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let params = form_urlencoded::parse(query.as_bytes()).into_owned().fold(
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HashMap::new(),
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|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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);
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if let Some(ids) = params.get("id") {
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for id in ids {
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2019-01-20 21:14:36 +03:00
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for id in id.split(',') {
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2018-11-03 09:46:12 +03:00
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if let Ok(x) = util::from_hex(String::from(id)) {
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commitments.push(Commitment::from_vec(x));
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}
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}
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}
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}
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if let Some(heights) = params.get("start_height") {
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for height in heights {
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start_height = height
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.parse()
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.map_err(|_| ErrorKind::RequestError("invalid start_height".to_owned()))?;
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}
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}
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if let Some(heights) = params.get("end_height") {
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for height in heights {
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end_height = height
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.parse()
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.map_err(|_| ErrorKind::RequestError("invalid end_height".to_owned()))?;
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}
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}
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if let Some(_) = params.get("include_rp") {
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include_rp = true;
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}
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debug!(
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"outputs_block_batch: {}-{}, {:?}, {:?}",
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start_height, end_height, commitments, include_rp,
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);
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let mut return_vec = vec![];
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for i in (start_height..=end_height).rev() {
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if let Ok(res) = self.outputs_at_height(i, commitments.clone(), include_rp) {
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if res.outputs.len() > 0 {
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return_vec.push(res);
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}
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}
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}
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Ok(return_vec)
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}
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}
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impl Handler for OutputHandler {
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fn get(&self, req: Request<Body>) -> ResponseFuture {
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2019-01-20 21:14:36 +03:00
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let command = match req.uri().path().trim_right_matches('/').rsplit('/').next() {
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2018-11-03 09:46:12 +03:00
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Some(c) => c,
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None => return response(StatusCode::BAD_REQUEST, "invalid url"),
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};
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match command {
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"byids" => result_to_response(self.outputs_by_ids(&req)),
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"byheight" => result_to_response(self.outputs_block_batch(&req)),
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_ => response(StatusCode::BAD_REQUEST, ""),
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}
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}
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}
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