url: use SafeSet to filter known special protocols #24703
Closed
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
nodejs-github-bot
added
the
url
|
can they just be changed to maps? |
|
@devsnek, They could be changed to Sets. There's no need to lookup a value. Would you prefer that? |
|
@mikesamuel i would definitely prefer using sets |
|
This seems to make the code harder to understand. We usually just go with |
|
I think the reason to no use null prototype objects was lookup performance. I don't know if it's still faster. |
|
Reworking to use sets. @lpinca, Re performance, https://github.com/anvaka/set-vs-object#conclusion is one microbenchmark. |
|
I changed it to use SafeSet (thanks @joyeecheung), squashed the commits, and changed the PR description to reflect that. |
|
I think my squash broke Travis's first commit message check :( |
|
@mikesamuel Can you update the commit message to something that describes the current approach? (e.g. something like |
Avoids a maintenance hazard when reviewers assume that
`hostlessProtocol` and `slashedProtocol` are disjoint.
The following may be counter-intuitive:
```js
// These objects seem to have no keys in common
const hostlessProtocol = { 'javascript': true };
const slashedProtocol = { 'http': true };
// A reasonable reviewer may assumes bothTrue is never truthy
function bothTrue(lowerProto) {
return hostlessProtocol[lowerProto] && slashedProtocol[lowerProto];
}
// But
console.log(Boolean(bothTrue('constructor'))); // true
```
This change uses SafeSet instead of plain-old objects.
----
Rejected alternative:
We could have used object with a `null` prototype as lookup tables
so that `lowerProto` is never treated as a key into `Object.prototype`.
```js
const hostlessProtocol = { __proto__: null, 'javascript': true };
const slashedProtocol = { __proto__: null, 'http': true };
function bothTrue(lowerProto) {
return hostlessProtocol[lowerProto] && slashedProtocol[lowerProto];
}
console.log(Boolean(bothTrue('constructor'))); // false
```
|
@joyeecheung, done |
mikesamuel
changed the title
joyeecheung
approved these changes
Nov 29, 2018
cjihrig
approved these changes
Nov 29, 2018
jasnell
approved these changes
Nov 30, 2018
Trott
added
the
author ready
|
(Benchmark tradeoffs look perfectly acceptable to me, but second opinion welcome.) |
|
Resume Build CI: https://ci.nodejs.org/job/node-test-pull-request/19114/ |
Trott
pushed a commit
to Trott/io.js
that referenced
this pull request
Dec 1, 2018
Avoids a maintenance hazard when reviewers assume that
`hostlessProtocol` and `slashedProtocol` are disjoint.
The following may be counter-intuitive:
```js
// These objects seem to have no keys in common
const hostlessProtocol = { 'javascript': true };
const slashedProtocol = { 'http': true };
// A reasonable reviewer may assumes bothTrue is never truthy
function bothTrue(lowerProto) {
return hostlessProtocol[lowerProto] && slashedProtocol[lowerProto];
}
// But
console.log(Boolean(bothTrue('constructor'))); // true
```
This change uses SafeSet instead of plain-old objects.
----
Rejected alternative:
We could have used object with a `null` prototype as lookup tables
so that `lowerProto` is never treated as a key into `Object.prototype`.
```js
const hostlessProtocol = { __proto__: null, 'javascript': true };
const slashedProtocol = { __proto__: null, 'http': true };
function bothTrue(lowerProto) {
return hostlessProtocol[lowerProto] && slashedProtocol[lowerProto];
}
console.log(Boolean(bothTrue('constructor'))); // false
```
PR-URL: nodejs#24703
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
|
Landed in 0d23118. Thanks for the contribution! 🎉 |
|
Post-mortem: benchmark results. The most significant ones (with Benchmark resultsSignificant impact |
BridgeAR
pushed a commit
that referenced
this pull request
Dec 5, 2018
Avoids a maintenance hazard when reviewers assume that
`hostlessProtocol` and `slashedProtocol` are disjoint.
The following may be counter-intuitive:
```js
// These objects seem to have no keys in common
const hostlessProtocol = { 'javascript': true };
const slashedProtocol = { 'http': true };
// A reasonable reviewer may assumes bothTrue is never truthy
function bothTrue(lowerProto) {
return hostlessProtocol[lowerProto] && slashedProtocol[lowerProto];
}
// But
console.log(Boolean(bothTrue('constructor'))); // true
```
This change uses SafeSet instead of plain-old objects.
----
Rejected alternative:
We could have used object with a `null` prototype as lookup tables
so that `lowerProto` is never treated as a key into `Object.prototype`.
```js
const hostlessProtocol = { __proto__: null, 'javascript': true };
const slashedProtocol = { __proto__: null, 'http': true };
function bothTrue(lowerProto) {
return hostlessProtocol[lowerProto] && slashedProtocol[lowerProto];
}
console.log(Boolean(bothTrue('constructor'))); // false
```
PR-URL: #24703
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
This was referenced Dec 7, 2018
refack
pushed a commit
to refack/node
that referenced
this pull request
Jan 14, 2019
Avoids a maintenance hazard when reviewers assume that
`hostlessProtocol` and `slashedProtocol` are disjoint.
The following may be counter-intuitive:
```js
// These objects seem to have no keys in common
const hostlessProtocol = { 'javascript': true };
const slashedProtocol = { 'http': true };
// A reasonable reviewer may assumes bothTrue is never truthy
function bothTrue(lowerProto) {
return hostlessProtocol[lowerProto] && slashedProtocol[lowerProto];
}
// But
console.log(Boolean(bothTrue('constructor'))); // true
```
This change uses SafeSet instead of plain-old objects.
----
Rejected alternative:
We could have used object with a `null` prototype as lookup tables
so that `lowerProto` is never treated as a key into `Object.prototype`.
```js
const hostlessProtocol = { __proto__: null, 'javascript': true };
const slashedProtocol = { __proto__: null, 'http': true };
function bothTrue(lowerProto) {
return hostlessProtocol[lowerProto] && slashedProtocol[lowerProto];
}
console.log(Boolean(bothTrue('constructor'))); // false
```
PR-URL: nodejs#24703
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
BethGriggs
pushed a commit
that referenced
this pull request
Feb 12, 2019
Avoids a maintenance hazard when reviewers assume that
`hostlessProtocol` and `slashedProtocol` are disjoint.
The following may be counter-intuitive:
```js
// These objects seem to have no keys in common
const hostlessProtocol = { 'javascript': true };
const slashedProtocol = { 'http': true };
// A reasonable reviewer may assumes bothTrue is never truthy
function bothTrue(lowerProto) {
return hostlessProtocol[lowerProto] && slashedProtocol[lowerProto];
}
// But
console.log(Boolean(bothTrue('constructor'))); // true
```
This change uses SafeSet instead of plain-old objects.
----
Rejected alternative:
We could have used object with a `null` prototype as lookup tables
so that `lowerProto` is never treated as a key into `Object.prototype`.
```js
const hostlessProtocol = { __proto__: null, 'javascript': true };
const slashedProtocol = { __proto__: null, 'http': true };
function bothTrue(lowerProto) {
return hostlessProtocol[lowerProto] && slashedProtocol[lowerProto];
}
console.log(Boolean(bothTrue('constructor'))); // false
```
PR-URL: #24703
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Merged
rvagg
pushed a commit
that referenced
this pull request
Feb 28, 2019
Avoids a maintenance hazard when reviewers assume that
`hostlessProtocol` and `slashedProtocol` are disjoint.
The following may be counter-intuitive:
```js
// These objects seem to have no keys in common
const hostlessProtocol = { 'javascript': true };
const slashedProtocol = { 'http': true };
// A reasonable reviewer may assumes bothTrue is never truthy
function bothTrue(lowerProto) {
return hostlessProtocol[lowerProto] && slashedProtocol[lowerProto];
}
// But
console.log(Boolean(bothTrue('constructor'))); // true
```
This change uses SafeSet instead of plain-old objects.
----
Rejected alternative:
We could have used object with a `null` prototype as lookup tables
so that `lowerProto` is never treated as a key into `Object.prototype`.
```js
const hostlessProtocol = { __proto__: null, 'javascript': true };
const slashedProtocol = { __proto__: null, 'http': true };
function bothTrue(lowerProto) {
return hostlessProtocol[lowerProto] && slashedProtocol[lowerProto];
}
console.log(Boolean(bothTrue('constructor'))); // false
```
PR-URL: #24703
Reviewed-By: Joyee Cheung <joyeec9h3@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
# for free
to join this conversation on GitHub.
Already have an account?
# to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Checklist
make -j4 test(UNIX), orvcbuild test(Windows) passesAvoids a maintenance hazard when reviewers assume that
hostlessProtocolandslashedProtocolare disjoint.The following may be counter-intuitive:
This change uses SafeSet instead of plain-old objects.
Rejected alternative:
We could have used object with a
nullprototype as lookup tablesso that
lowerProtois never treated as a key intoObject.prototype.