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feat: Automatically set tls.servername option with rediss:// URLs #950

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7 changes: 7 additions & 0 deletions lib/redis/index.ts
Original file line number Diff line number Diff line change
Expand Up @@ -192,6 +192,7 @@ Redis.prototype.resetOfflineQueue = function() {

Redis.prototype.parseOptions = function() {
this.options = {};
let isTls = false;
for (var i = 0; i < arguments.length; ++i) {
var arg = arguments[i];
if (arg === null || typeof arg === "undefined") {
Expand All @@ -201,12 +202,18 @@ Redis.prototype.parseOptions = function() {
defaults(this.options, arg);
} else if (typeof arg === "string") {
defaults(this.options, parseURL(arg));
if (arg.startsWith("rediss://")) {
isTls = true;
}
} else if (typeof arg === "number") {
this.options.port = arg;
} else {
throw new Error("Invalid argument " + arg);
}
}
if (isTls) {
defaults(this.options, { tls: { servername: this.options.host } });
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I'm not sure if setting tls to this.options.host instead of true applies to more scenarios, but I think at least we need to check whether this.options.host is a hostname instead of an IP address.

As for me, I prefer the way that we just default tls options to true without setting any other properties (like servername) and let users handle it. The improvement we should make here is to keep the options provided by users not be overwritten.

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I'm not sure if setting tls to this.options.host instead of true applies to more scenarios, but I think at least we need to check whether this.options.host is a hostname instead of an IP address.

I'm happy to make that modification if you'd like.

Setting tls.options.host to the hostname of the server is necessary to use many shared Redis hosting services, including Compose.io and Redis Labs. It reduces boilerplate and seems like a reasonable default as this is not really a fringe use case, but a common scenario for TLS.

The improvement we should make here is to keep the options provided by users not be overwritten.

Alternatively, #949 does just that!

}
defaults(this.options, Redis.defaultOptions);

if (typeof this.options.port === "string") {
Expand Down
3 changes: 0 additions & 3 deletions lib/utils/index.ts
Original file line number Diff line number Diff line change
Expand Up @@ -274,9 +274,6 @@ export function parseURL(url) {
if (parsed.port) {
result.port = parsed.port;
}
if (parsed.protocol === "rediss:") {
result.tls = true;
}
defaults(result, parsed.query);

return result;
Expand Down
8 changes: 8 additions & 0 deletions test/unit/redis.ts
Original file line number Diff line number Diff line change
Expand Up @@ -80,6 +80,14 @@ describe("Redis", function() {
host: "192.168.1.1"
});
expect(option).to.have.property("port", 6380);

option = getOption("rediss://host.test");
expect(option.tls).to.deep.equal({ servername: "host.test" });

option = getOption("rediss://example.test", {
tls: { rejectUnauthorized: false }
});
expect(option.tls).to.deep.equal({ rejectUnauthorized: false });
} catch (err) {
stub.restore();
throw err;
Expand Down
1 change: 0 additions & 1 deletion test/unit/utils.ts
Original file line number Diff line number Diff line change
Expand Up @@ -195,7 +195,6 @@ describe("utils", function() {
expect(
utils.parseURL("rediss://user:pass@127.0.0.1:6380/4?key=value")
).to.eql({
tls: true,
host: "127.0.0.1",
port: "6380",
db: "4",
Expand Down