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import simpleGit from "simple-git"
import express, { NextFunction } from "express"
require("express-async-errors") // todo: why the require?
import cookieParser from "cookie-parser"
import "reflect-metadata"
import * as http from "http"
import {
ADMIN_SERVER_HOST,
ADMIN_SERVER_PORT,
ENV,
SLACK_ERRORS_WEBHOOK_URL,
} from "../settings/serverSettings"
import * as db from "../db/db"
import * as wpdb from "../db/wpdb"
import { IndexPage } from "./IndexPage"
import { authCloudflareSSOMiddleware, authMiddleware } from "./authentication"
import { apiRouter } from "./apiRouter"
import { testPageRouter } from "./testPageRouter"
import { adminRouter } from "./adminRouter"
import { renderToHtmlPage } from "../serverUtils/serverUtil"
import { publicApiRouter } from "./publicApiRouter"
import { mockSiteRouter } from "./mockSiteRouter"
import { GIT_CMS_DIR } from "../gitCms/GitCmsConstants"
const expressErrorSlack = require("express-error-slack") // todo: why the require?
interface OwidAdminAppOptions {
slackErrorsWebHookUrl?: string
gitCmsDir: string
isDev: boolean
quiet?: boolean
}
export class OwidAdminApp {
constructor(options: OwidAdminAppOptions) {
this.options = options
}
app = express()
private options: OwidAdminAppOptions
private async getGitCmsBranchName() {
const git = simpleGit({
baseDir: this.options.gitCmsDir,
binary: "git",
maxConcurrentProcesses: 1,
})
const branches = await git.branchLocal()
const gitCmsBranchName = await branches.current
return gitCmsBranchName
}
private gitCmsBranchName = ""
server?: http.Server
async stopListening() {
if (!this.server) return
this.server.close()
}
async startListening(adminServerPort: number, adminServerHost: string) {
this.gitCmsBranchName = await this.getGitCmsBranchName()
const { app } = this
// since the server is running behind a reverse proxy (nginx), we need to "trust"
// the X-Forwarded-For header in order to get the real request IP
// https://expressjs.com/en/guide/behind-proxies.html
app.set("trust proxy", true)
// Parse cookies https://github.com/expressjs/cookie-parser
app.use(cookieParser())
app.use(express.urlencoded({ extended: true, limit: "50mb" }))
app.use("/admin/login", authCloudflareSSOMiddleware)
// Require authentication (only for /admin requests)
app.use(authMiddleware)
app.use("/api", publicApiRouter.router)
app.use("/admin/api", apiRouter.router)
app.use("/admin/test", testPageRouter)
app.use("/admin/assets", express.static("itsJustJavascript/webpack"))
app.use("/admin/storybook", express.static(".storybook/build"))
app.use("/admin", adminRouter)
// Default route: single page admin app
app.get("/admin/*", async (req, res) => {
res.send(
renderToHtmlPage(
<IndexPage
username={res.locals.user.fullName}
isSuperuser={res.locals.user.isSuperuser}
gitCmsBranchName={this.gitCmsBranchName}
/>
)
)
})
// Send errors to Slack
// The middleware passes all errors onto the next error-handling middleware
if (this.options.slackErrorsWebHookUrl)
app.use(
expressErrorSlack({
webhookUri: this.options.slackErrorsWebHookUrl,
})
)
// todo: we probably always want to have this, and can remove the isDev
if (this.options.isDev) app.use("/", mockSiteRouter)
// Give full error messages, including in production
app.use(this.errorHandler)
await this.connectToDatabases()
this.server = await this.listenPromise(
app,
adminServerPort,
adminServerHost
)
this.server.timeout = 5 * 60 * 1000 // Increase server timeout for long-running uploads
if (!this.options.quiet)
console.log(
`owid-admin server started on http://${adminServerHost}:${adminServerPort}`
)
}
// Server.listen does not seem to have an async/await form yet.
// https://github.com/expressjs/express/pull/3675
// https://github.com/nodejs/node/issues/21482
private listenPromise(
app: express.Express,
adminServerPort: number,
adminServerHost: string
): Promise<http.Server> {
return new Promise((resolve) => {
const server = app.listen(adminServerPort, adminServerHost, () => {
resolve(server)
})
})
}
errorHandler = async (
err: any,
req: express.Request,
res: express.Response,
// keep `next` because Express only passes errors to handlers with 4 parameters.
// eslint-disable-next-line @typescript-eslint/no-unused-vars
next: NextFunction
) => {
if (!res.headersSent) {
res.status(err.status || 500)
res.send({
error: {
message: err.stack || err,
status: err.status || 500,
},
})
} else {
res.write(
JSON.stringify({
error: {
message: err.stack || err,
status: err.status || 500,
},
})
)
res.end()
}
}
connectToDatabases = async () => {
try {
await db.getConnection()
} catch (error) {
// grapher database is in fact required, but we will not fail now in case it
// comes online later
if (!this.options.quiet) {
console.error(error)
console.warn(
"Could not connect to grapher database. Continuing without DB..."
)
}
}
if (wpdb.isWordpressDBEnabled) {
try {
await wpdb.singleton.connect()
} catch (error) {
if (!this.options.quiet) {
console.error(error)
console.warn(
"Could not connect to Wordpress database. Continuing without Wordpress..."
)
}
}
} else if (!this.options.quiet) {
console.log(
"WORDPRESS_DB_NAME is not configured -- continuing without Wordpress DB"
)
}
if (!wpdb.isWordpressAPIEnabled && !this.options.quiet) {
console.log(
"WORDPRESS_API_URL is not configured -- continuing without Wordpress API"
)
}
}
}
if (!module.parent)
new OwidAdminApp({
slackErrorsWebHookUrl: SLACK_ERRORS_WEBHOOK_URL,
gitCmsDir: GIT_CMS_DIR,
isDev: ENV === "development",
}).startListening(ADMIN_SERVER_PORT, ADMIN_SERVER_HOST)
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