147 lines
4.2 KiB
C++
147 lines
4.2 KiB
C++
/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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*
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* Copyright (C) 2019 Red Hat, Inc.
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*
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* This program 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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*
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* This program 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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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <pthread.h>
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#include <cpprest/http_client.h>
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#include <bits/stdc++.h>
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using namespace std;
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vector<string> split(const string &in)
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{
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istringstream stream(in);
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vector<string> parts;
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string part;
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while (getline(stream, part, '.')) {
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parts.push_back(part);
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}
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return parts;
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}
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class Cache {
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// A queue of hostname, URL pairs. The head of the queue is always
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// the most recently accessed entry, the tail is the least.
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list<pair<const string, const string>> queue;
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// A map of hostname -> iterator that points into the queue, for
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// quick lookup.
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unordered_map<string, list<pair<const string, const string>>::iterator> map;
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// The maximum size of the cache.
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const uint32_t size;
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public:
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Cache(uint s)
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: queue {}, map {}, size{s}
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{ }
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// Lookup the hostname in the cache and return the URL if present.
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// If the entry is present, it is moved to the head of the queue.
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optional<const string> get(const string &key)
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{
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auto location = map.find(key);
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if (location == map.end())
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return {};
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auto val = *(location->second);
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queue.erase(location->second);
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queue.push_front(val);
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//cout << "get push " << val.second << endl;
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return val.second;
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}
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// Add an entry to the cache. If the cache is full, drop the least
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// recently used entry.
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void put(const string &key, const string &value)
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{
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auto location = map.find(key);
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if (location != map.end())
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return;
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if (queue.size() == size) {
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auto last = queue.back();
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//cout << "put pop " << last.second << endl;
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queue.pop_back();
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map.erase(last.first);
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}
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//cout << "put push " << value << endl;
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queue.push_front(make_pair(key, value));
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map[key] = queue.begin();
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}
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};
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int main(int, char**)
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{
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web::http::client::http_client client("https://zuul.opendev.org");
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string hostname;
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Cache cache{2};
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while (getline(cin, hostname)) {
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// Expected hostname:
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// site.75031cad206c4014ad7a3387091d15ab.openstack.preview.opendev.org
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// Apache will drop "preview.opendev.org", so our expected input will be:
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// site.75031cad206c4014ad7a3387091d15ab.openstack
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// site.7c16d914db5a4c4b91cd9a31d119dd48.openstack
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// site.688b70499b9a41a08f498ed6e932960c.openstack
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// site.dbefc23dcc594577a8bfa4db4f9b0a8f.openstack
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if (auto val = cache.get(hostname)) {
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cout << val.value() << endl;
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continue;
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}
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auto parts = split(hostname);
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if (parts.size() < 3) {
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cout << "not enough args" << endl;
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continue;
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}
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auto artifact = parts[0];
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auto buildid = parts[1];
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auto tenant = parts[2];
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/*
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cout << artifact << endl
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<< buildid << endl
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<< tenant << endl;
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*/
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// 75031cad206c4014ad7a3387091d15ab
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try {
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auto uri = web::uri_builder("/api/tenant/" + tenant + "/build");
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uri.append_path(buildid);
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auto response = client.request(
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web::http::methods::GET, uri.to_string()).get();
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// body is a web::json::value
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// cout << response.status_code() << endl;
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auto body = response.extract_json().get();
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//cout << body.serialize() << endl;
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// TODO: use artifact
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// body["log_url"].as_string() returns a const std::string&
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cout << body["log_url"].as_string() << endl;
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cache.put(hostname, body["log_url"].as_string());
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} catch (...) {
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cout << "error" << endl;
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}
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}
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}
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