Validate default homeserver config before loading the app

Implements the process described here: https://github.com/vector-im/riot-web/issues/9290#issuecomment-481966910

The expectation is that later layers (like the react-sdk) will make use of the `validated_discovery_config` option instead of interpreting the config themselves.

We intentionally block the UI from loading here to avoid races between discovery and the app loading.
pull/9496/head
Travis Ralston 3 years ago
parent 9cd4ac1df4
commit f08491cee8
  1. 38
      README.md
  2. 12
      config.sample.json
  3. 7
      src/i18n/strings/en_EN.json
  4. 186
      src/vector/index.js

@ -109,25 +109,29 @@ You can configure the app by copying `config.sample.json` to
For a good example, see https://riot.im/develop/config.json.
1. `default_server_name` sets the default server name to use for authentication.
This will trigger Riot to ask
`https://<server_name>/.well-known/matrix/client` for the homeserver and
identity server URLs to use. This is the recommended approach for setting a
default server. However, it is also possible to use the following to directly
configure each of the URLs:
* `default_hs_url` sets the default homeserver URL.
* `default_is_url` sets the default identity server URL (this is the server used
for verifying third party identifiers like email addresses). If this is blank,
registering with an email address, adding an email address to your account,
or inviting users via email address will not work. Matrix identity servers are
very simple web services which map third party identifiers (currently only email
addresses) to matrix IDs: see http://matrix.org/docs/spec/identity_service/unstable.html
for more details. Currently the only public matrix identity servers are https://matrix.org
and https://vector.im. In the future, identity servers will be decentralised.
* Riot will report an error if you accidentally configure both `default_server_name` _and_ `default_hs_url` since it's unclear which should take priority.
1. `default_server_config` sets the default homeserver and identity server URL for
Riot to use. The object is the same as returned by [https://<server_name>/.well-known/matrix/client](https://matrix.org/docs/spec/client_server/latest.html#get-well-known-matrix-client),
with added support for a `server_name` under the `m.homeserver` section to display
a custom homeserver name. Alternatively, the config can contain a `default_server_name`
instead which is where Riot will go to get that same object - see the `.well-known`
link above for more information.
* *Note*: The URLs can also be individually specified as `default_hs_url` and
`default_is_url`, however these are deprecated. They are maintained for backwards
compatibility with older configurations. `default_is_url` is respected only
if `default_hs_url` is used.
* The identity server is used for verifying third party identifiers like emails
and phone numbers. It is not used to store your password or account information.
If not provided, the identity server defaults to vector.im unless `disable_identity_server`
is set to true in the config. Currently the only two public identity servers
are https://matrix.org and https://vector.im, however in future identity servers
will be decentralised.
* Riot will fail to load if a mix of `default_server_config`, `default_server_name`, or
`default_hs_url` is specified. When multiple sources are specified, it is unclear
which should take priority and therefore the application cannot continue.
1. `features`: Lookup of optional features that may be `enable`d, `disable`d, or exposed to the user
in the `labs` section of settings. The available optional experimental features vary from
release to release.
release to release. Some of the available features are described in the Labs Feature section
of this README.
1. `brand`: String to pass to your homeserver when configuring email notifications, to let the
homeserver know what email template to use when talking to you.
1. `branding`: Configures various branding and logo details, such as:

@ -1,6 +1,14 @@
{
"default_hs_url": "https://matrix.org",
"default_is_url": "https://vector.im",
"default_server_config": {
"m.homeserver": {
"base_url": "https://matrix.org",
"server_name": "matrix.org"
},
"m.identity_server": {
"base_url": "https://vector.im"
}
},
"disable_identity_server": false,
"disable_custom_urls": false,
"disable_guests": false,
"disable_login_language_selector": false,

@ -1,4 +1,7 @@
{
"Unexpected error preparing the app. See console for details.": "Unexpected error preparing the app. See console for details.",
"Invalid configuration: can only specify one of default_server_config, default_server_name, or default_hs_url.": "Invalid configuration: can only specify one of default_server_config, default_server_name, or default_hs_url.",
"Unexpected error resolving homeserver configuration": "Unexpected error resolving homeserver configuration",
"Riot Desktop on %(platformName)s": "Riot Desktop on %(platformName)s",
"Unknown device": "Unknown device",
"%(appName)s via %(browserName)s on %(osName)s": "%(appName)s via %(browserName)s on %(osName)s",
@ -15,7 +18,5 @@
"Need help?": "Need help?",
"Chat with Riot Bot": "Chat with Riot Bot",
"Explore rooms": "Explore rooms",
"Room Directory": "Room Directory",
"Search the room directory": "Search the room directory",
"Get started with some tips from Riot Bot!": "Get started with some tips from Riot Bot!"
"Room Directory": "Room Directory"
}

@ -45,6 +45,8 @@ import VectorConferenceHandler from 'matrix-react-sdk/lib/VectorConferenceHandle
import Promise from 'bluebird';
import request from 'browser-request';
import * as languageHandler from 'matrix-react-sdk/lib/languageHandler';
import {_t, _td} from 'matrix-react-sdk/lib/languageHandler';
import {AutoDiscovery} from "matrix-js-sdk/lib/autodiscovery";
import url from 'url';
@ -341,22 +343,37 @@ async function loadApp() {
const platform = PlatformPeg.get();
platform.startUpdater();
const MatrixChat = sdk.getComponent('structures.MatrixChat');
window.matrixChat = ReactDOM.render(
<MatrixChat
onNewScreen={onNewScreen}
makeRegistrationUrl={makeRegistrationUrl}
ConferenceHandler={VectorConferenceHandler}
config={configJson}
realQueryParams={params}
startingFragmentQueryParams={fragparts.params}
enableGuest={!configJson.disable_guests}
onTokenLoginCompleted={onTokenLoginCompleted}
initialScreenAfterLogin={getScreenFromLocation(window.location)}
defaultDeviceDisplayName={platform.getDefaultDeviceDisplayName()}
/>,
document.getElementById('matrixchat'),
);
// Don't bother loading the app until the config is verified
verifyServerConfig().then((newConfig) => {
const MatrixChat = sdk.getComponent('structures.MatrixChat');
window.matrixChat = ReactDOM.render(
<MatrixChat
onNewScreen={onNewScreen}
makeRegistrationUrl={makeRegistrationUrl}
ConferenceHandler={VectorConferenceHandler}
config={newConfig}
realQueryParams={params}
startingFragmentQueryParams={fragparts.params}
enableGuest={!configJson.disable_guests}
onTokenLoginCompleted={onTokenLoginCompleted}
initialScreenAfterLogin={getScreenFromLocation(window.location)}
defaultDeviceDisplayName={platform.getDefaultDeviceDisplayName()}
/>,
document.getElementById('matrixchat'),
);
}).catch(err => {
console.error(err);
const errorMessage = err.translatedMessage
|| _t("Unexpected error preparing the app. See console for details.");
// Like the compatibility page, AWOOOOOGA at the user
const GenericErrorPage = sdk.getComponent("structures.GenericErrorPage");
window.matrixChat = ReactDOM.render(
<GenericErrorPage message={errorMessage} />,
document.getElementById('matrixchat'),
);
});
} else {
console.error("Browser is missing required features.");
// take to a different landing page to AWOOOOOGA at the user
@ -428,4 +445,141 @@ async function loadLanguage() {
}
}
async function verifyServerConfig() {
console.log("Verifying homeserver configuration");
// Errors which can be returned by .well-known lookups. If autodiscovery fails for unexpected reasons,
// the last thing we want is "missing-translation|en:Your error here". The actual strings are also defined
// in the react-sdk, so we don't need them here.
const discoveryErrors = [
"Invalid homeserver discovery response",
"Failed to get autodiscovery configuration from server",
"Invalid base_url for m.homeserver",
"Homeserver URL does not appear to be a valid Matrix homeserver",
"Invalid identity server discovery response",
"Invalid base_url for m.identity_server",
"Identity server URL does not appear to be a valid identity server",
"General failure",
];
const config = SdkConfig.get();
let wkConfig = config['default_server_config']; // overwritten later under some conditions
const serverName = config['default_server_name'];
const hsUrl = config['default_hs_url'];
const isUrl = config['default_is_url'];
const incompatibleOptions = [wkConfig, serverName, hsUrl].filter(i => !!i);
if (incompatibleOptions.length > 1) {
throw newTranslatableError(_td(
"Invalid configuration: can only specify one of default_server_config, default_server_name, " +
"or default_hs_url.",
));
}
if (hsUrl) {
console.log("Config uses a default_hs_url - constructing a default_server_config using this information");
wkConfig = {
"m.homeserver": {
"base_url": hsUrl,
},
};
if (isUrl) {
wkConfig["m.identity_server"] = {
"base_url": isUrl,
};
}
}
let result = null;
if (wkConfig) {
console.log("Config uses a default_server_config - validating object");
result = await AutoDiscovery.fromDiscoveryConfig(wkConfig);
}
if (serverName) {
console.log("Config uses a default_server_name - doing .well-known lookup");
result = await AutoDiscovery.findClientConfig(serverName);
}
if (!result || !result["m.homeserver"]) {
// This shouldn't happen without major misconfiguration, so we'll log a bit of information
// in the log so we can find this bit of codee but otherwise tell teh user "it broke".
console.error("Ended up in a state of not knowing which homeserver to connect to.");
throw newTranslatableError(_td("Unexpected error resolving homeserver configuration"));
}
const hsResult = result['m.homeserver'];
if (hsResult.state !== AutoDiscovery.SUCCESS) {
if (discoveryErrors.indexOf(hsResult.error) !== -1) {
throw newTranslatableError(hsResult.error);
}
throw newTranslatableError(_td("Unexpected error resolving homeserver configuration"));
}
const isResult = result['m.identity_server'];
let preferredIdentityUrl = "https://vector.im";
if (isResult && isResult.state === AutoDiscovery.SUCCESS) {
preferredIdentityUrl = isResult["base_url"];
} else if (isResult && isResult.state !== AutoDiscovery.PROMPT) {
console.error("Error determining preferred identity server URL:", isResult);
throw newTranslatableError(_td("Unexpected error resolving homeserver configuration"));
}
const preferredHomeserverUrl = hsResult["base_url"];
let preferredHomeserverName = serverName ? serverName : hsResult["server_name"];
const url = new URL(preferredHomeserverUrl);
if (!preferredHomeserverName) preferredHomeserverName = url.hostname;
// It should have been set by now, so check it
if (!preferredHomeserverName) {
console.error("Failed to parse homeserver name from homeserver URL");
throw newTranslatableError(_td("Unexpected error resolving homeserver configuration"));
}
const isServerNameDifferentFromUrl = url.hostname !== preferredHomeserverName;
console.log("Using homeserver config:", {
isServerNameDifferentFromUrl,
preferredHomeserverName,
preferredHomeserverUrl,
preferredIdentityUrl,
});
// Build our own discovery result for distribution within the app
const configResult = {
"m.homeserver": {
"base_url": preferredHomeserverUrl,
"server_name": preferredHomeserverName,
"server_name_different": isServerNameDifferentFromUrl,
},
"m.identity_server": {
"base_url": preferredIdentityUrl,
"enabled": !SdkConfig.get()['disable_identity_server'],
},
};
// Copy over any other keys that may be of interest
for (const key of Object.keys(result)) {
if (key === "m.homeserver" || key === "m.identity_server") continue;
configResult[key] = JSON.parse(JSON.stringify(result[key])); // deep clone
}
// Add the newly built config to the actual config for use by the app
console.log("Updating SdkConfig with validated discovery information");
SdkConfig.add({"validated_discovery_config": configResult});
return SdkConfig.get();
}
// Helper function to provide English errors in logs, but present translated
// errors to users.
function newTranslatableError(message) {
const error = new Error(message);
error.translatedMessage = _t(message);
return error;
}
loadApp();

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