134 lines
4.1 KiB
Rust
134 lines
4.1 KiB
Rust
// Copyright 2015-2017 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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use std::io;
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use std::io::Read;
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use std::fs;
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use std::path::{Path, PathBuf};
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use page::{LocalPageEndpoint, PageCache};
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use endpoint::{Endpoints, EndpointInfo};
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use apps::manifest::{MANIFEST_FILENAME, deserialize_manifest};
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struct LocalDapp {
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id: String,
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path: PathBuf,
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info: EndpointInfo,
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}
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/// Tries to find and read manifest file in given `path` to extract `EndpointInfo`
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/// If manifest is not found sensible default `EndpointInfo` is returned based on given `name`.
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fn read_manifest(name: &str, mut path: PathBuf) -> EndpointInfo {
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path.push(MANIFEST_FILENAME);
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fs::File::open(path.clone())
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.map_err(|e| format!("{:?}", e))
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.and_then(|mut f| {
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// Reat file
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let mut s = String::new();
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f.read_to_string(&mut s).map_err(|e| format!("{:?}", e))?;
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// Try to deserialize manifest
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deserialize_manifest(s)
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})
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.map(Into::into)
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.unwrap_or_else(|e| {
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warn!(target: "dapps", "Cannot read manifest file at: {:?}. Error: {:?}", path, e);
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EndpointInfo {
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name: name.into(),
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description: name.into(),
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version: "0.0.0".into(),
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author: "?".into(),
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icon_url: "icon.png".into(),
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}
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})
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}
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/// Returns Dapp Id and Local Dapp Endpoint for given filesystem path.
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/// Parses the path to extract last component (for name).
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/// `None` is returned when path is invalid or non-existent.
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pub fn local_endpoint<P: AsRef<Path>>(path: P, signer_address: Option<(String, u16)>) -> Option<(String, Box<LocalPageEndpoint>)> {
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let path = path.as_ref().to_owned();
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path.canonicalize().ok().and_then(|path| {
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let name = path.file_name().and_then(|name| name.to_str());
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name.map(|name| {
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let dapp = local_dapp(name.into(), path.clone());
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(dapp.id, Box::new(LocalPageEndpoint::new(
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dapp.path, dapp.info, PageCache::Disabled, signer_address.clone())
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))
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})
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})
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}
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fn local_dapp(name: String, path: PathBuf) -> LocalDapp {
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// try to get manifest file
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let info = read_manifest(&name, path.clone());
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LocalDapp {
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id: name,
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path: path,
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info: info,
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}
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}
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/// Returns endpoints for Local Dapps found for given filesystem path.
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/// Scans the directory and collects `LocalPageEndpoints`.
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pub fn local_endpoints<P: AsRef<Path>>(dapps_path: P, signer_address: Option<(String, u16)>) -> Endpoints {
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let mut pages = Endpoints::new();
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for dapp in local_dapps(dapps_path.as_ref()) {
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pages.insert(
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dapp.id,
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Box::new(LocalPageEndpoint::new(dapp.path, dapp.info, PageCache::Disabled, signer_address.clone()))
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);
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}
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pages
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}
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fn local_dapps(dapps_path: &Path) -> Vec<LocalDapp> {
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let files = fs::read_dir(dapps_path);
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if let Err(e) = files {
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warn!(target: "dapps", "Unable to load local dapps from: {}. Reason: {:?}", dapps_path.display(), e);
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return vec![];
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}
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let files = files.expect("Check is done earlier");
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files.map(|dir| {
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let entry = dir?;
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let file_type = entry.file_type()?;
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// skip files
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if file_type.is_file() {
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return Err(io::Error::new(io::ErrorKind::NotFound, "Not a file"));
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}
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// take directory name and path
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entry.file_name().into_string()
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.map(|name| (name, entry.path()))
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.map_err(|e| {
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info!(target: "dapps", "Unable to load dapp: {:?}. Reason: {:?}", entry.path(), e);
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io::Error::new(io::ErrorKind::NotFound, "Invalid name")
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})
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})
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.filter_map(|m| {
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if let Err(ref e) = m {
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debug!(target: "dapps", "Ignoring local dapp: {:?}", e);
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}
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m.ok()
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})
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.map(|(name, path)| local_dapp(name, path))
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.collect()
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}
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