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cert-check-server.ts
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import { getLocal, Mockttp } from 'mockttp';
import { getDeferred } from '@httptoolkit/util';
import { HtkConfig } from './config';
import { EPHEMERAL_PORT_RANGE } from './constants';
const buildPage = (style: string, script?: string, body?: string) =>
`<html>
<head>
<title>HTTP Toolkit HTTPS Test</title>
<meta charset="UTF-8" />
<link href="http://fonts.googleapis.com/css?family=Lato" rel="stylesheet" />
<style>
body {
margin: 0;
padding: 20px;
}
${style}
</style>
${script}
</head>
<body>
${body}
</body>
</html>`;
export class CertCheckServer {
constructor(private config: HtkConfig) { }
private server: Mockttp | undefined;
private certCheckedSuccessfully = getDeferred<boolean>();
async start(targetUrl: string) {
this.server = getLocal({ https: this.config.https, cors: true });
await this.server.start(EPHEMERAL_PORT_RANGE);
await Promise.all([
this.server.forGet('/test-https').thenCallback(() => {
console.log('Request to /test-https successfully received');
this.certCheckedSuccessfully.resolve(true);
return { statusCode: 200 };
}),
this.server.forGet('/check-cert').thenCallback(() => {
console.log('Request to /check-cert received');
return {
statusCode: 200,
body: buildPage(`
body {
background-color: #d8e2e6;
font-family: Lato, Arial;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
box-sizing: border-box;
text-align: center;
}
p {
font-size: 16pt;
}
iframe {
display: none;
}
`,`
<script>
let installingCert = false;
const targetUrl = ${JSON.stringify(targetUrl)};
function ensureCertificateIsInstalled() {
const testUrl = window.location.href.replace('http://', 'https://').replace('check-cert', 'test-https');
const failedUrl = window.location.href.replace('check-cert', 'failed-test');
fetch(testUrl)
.then(() => true)
.catch(() => false)
.then((certificateIsTrusted) => {
if (certificateIsTrusted) {
window.location.replace(targetUrl);
} else {
window.location.replace(failedUrl);
}
});
}
ensureCertificateIsInstalled();
</script>
`, `
<svg
version="1.1"
xmlns="http://www.w3.org/2000/svg"
xmlns:xlink="http://www.w3.org/1999/xlink"
x="0px"
y="0px"
width="400px"
height="400px"
viewBox="0 0 50 50"
style="enable-background:new 0 0 50 50;"
>
<path fill="#b6c2ca" d="M25.251,6.461c-10.318,0-18.683,8.365-18.683,18.683h4.068c0-8.071,6.543-14.615,14.615-14.615V6.461z">
<animateTransform
attributeType="xml"
attributeName="transform"
type="rotate"
from="0 25 25"
to="360 25 25"
dur="6s"
repeatCount="indefinite"
/>
</path>
</svg>
`)
};
}),
this.server.forGet('/failed-test').thenCallback(() => {
console.log('Request to /failed-test received');
this.certCheckedSuccessfully.resolve(false);
return {
statusCode: 200,
body: buildPage(`
body {
background-color: #d8e2e6;
font-family: Lato, Arial;
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
width: 60%;
box-sizing: border-box;
text-align: center;
}
p {
font-size: 16pt;
}
iframe {
display: none;
}
`, ``, `
<p>
This browser does not trust the HTTP Toolkit certificate authority, so HTTPS traffic can't be intercepted.
</p><p>
Closing the browser and starting it again from HTTP Toolkit will often resolve this. If not,
please file a bug at <strong>github.com/httptoolkit/httptoolkit</strong>.
</p>
`)
};
}),
]);
}
get host(): string {
return this.server!.url
.replace('https://', '');
}
get url(): string {
return this.server!.url
.replace('https://', 'http://')
.replace(/\/?$/, '/check-cert');
}
async waitForSuccess(): Promise<void> {
return this.certCheckedSuccessfully.promise
.then((result) => {
if (result !== true) throw new Error("Certificate check failed");
});
}
async stop() {
if (this.server) {
await this.server.stop();
this.server = undefined;
}
}
}