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noscript.ts
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// Copyright (c) 2020, Compiler Explorer Authors
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
import express from 'express';
import {isString} from '../../shared/common-utils.js';
import {LanguageKey} from '../../types/languages.interfaces.js';
import {assert} from '../assert.js';
import {ClientStateNormalizer} from '../clientstate-normalizer.js';
import {ClientState} from '../clientstate.js';
import {logger} from '../logger.js';
import {ClientOptionsHandler} from '../options-handler.js';
import {StorageBase} from '../storage/index.js';
import {CompileHandler} from './compile.js';
import {cached, csp} from './middleware.js';
function isMobileViewer(req: express.Request) {
return req.header('CloudFront-Is-Mobile-Viewer') === 'true';
}
export class NoScriptHandler {
readonly clientOptionsHandler: ClientOptionsHandler;
readonly renderConfig: (a: any, b: any) => any;
readonly storageHandler: StorageBase;
readonly defaultLanguage: string;
readonly compileHandler: CompileHandler;
/* the type for config makes the most sense to define in app.ts or api.ts */
constructor(
private readonly router: express.Router,
config: any,
) {
this.clientOptionsHandler = config.clientOptionsHandler;
this.renderConfig = config.renderConfig;
this.storageHandler = config.storageHandler;
this.compileHandler = config.compileHandler;
this.defaultLanguage = config.opts.wantedLanguage;
}
InitializeRoutes() {
this.router
.get('/noscript', cached, csp, (req, res) => {
this.renderNoScriptLayout(undefined, req, res);
})
.get('/noscript/z/:id', cached, csp, this.storedStateHandlerNoScript.bind(this))
.get('/noscript/sponsors', cached, csp, (req, res) => {
res.render(
'noscript/sponsors',
this.renderConfig(
{
embedded: false,
mobileViewer: isMobileViewer(req),
},
req.query,
),
);
})
.get('/noscript/:language', cached, csp, (req, res) => {
this.renderNoScriptLayout(undefined, req, res);
});
}
storedStateHandlerNoScript(req: express.Request, res: express.Response, next: express.NextFunction) {
const id = req.params.id;
this.storageHandler
.expandId(id)
.then(result => {
const config = JSON.parse(result.config);
let clientstate: ClientState;
if (config.content) {
const normalizer = new ClientStateNormalizer();
normalizer.fromGoldenLayout(config);
clientstate = normalizer.normalized;
} else {
clientstate = new ClientState(config);
}
this.renderNoScriptLayout(clientstate, req, res);
this.storageHandler.incrementViewCount(id).catch(err => {
logger.error(`Error incrementing view counts for ${id} - ${err}`);
});
})
.catch(err => {
logger.warn(`Could not expand ${id}: ${err}`);
next({
statusCode: 404,
message: `ID "${id}" could not be found`,
});
});
}
createDefaultState(wantedLanguage: LanguageKey) {
const options = this.clientOptionsHandler.get();
const state = new ClientState();
const session = state.findOrCreateSession(1);
session.language = wantedLanguage;
if (options.languages[wantedLanguage]) {
session.source = options.languages[wantedLanguage].example;
} else {
session.source = '';
}
const compiler = session.findOrCreateCompiler(1);
if (options.defaultCompiler[wantedLanguage]) {
compiler.id = options.defaultCompiler[wantedLanguage];
} else {
compiler.id = '';
}
return state;
}
renderNoScriptLayout(state: ClientState | undefined, req: express.Request, res: express.Response) {
let wantedLanguage = 'c++';
if (req.params?.language) {
wantedLanguage = req.params.language;
} else {
if (this.defaultLanguage) wantedLanguage = this.defaultLanguage;
if (req.query.language) {
const lang = req.query.language;
assert(isString(lang));
wantedLanguage = lang;
}
}
if (!state) {
state = this.createDefaultState(wantedLanguage as LanguageKey);
}
res.render(
'noscript/index',
this.renderConfig(
{
embedded: false,
mobileViewer: isMobileViewer(req),
wantedLanguage: wantedLanguage,
clientstate: state,
storedStateId: req.params.id || false,
},
req.query,
),
);
}
}