◐ Shell
clean mode source ↗

fs: fix `createReadStream(…, {end: n})` for non-seekable fds by addaleax · Pull Request #19329 · nodejs/node

82bdf8f fixed an issue by silently modifying the `start`
option for the case when only `end` is passed, in order to perform
reads from a specified range in the file.

However, that approach does not work for non-seekable files, since
a numeric `start` option means that positioned reads will be used
to read data from the file.

This patch fixes that, and instead ends reading after a specified
size by adjusting the read buffer size.

This way we avoid re-introducing the bug that 82bdf8f fixed,
and align behaviour with the native file stream mechanism
introduced in nodejs#18936 as well.

Fixes: nodejs#19240
Refs: nodejs#18121

mcollina

MoonBall

@addaleax addaleax added the author ready

PRs that have at least one approval, no pending requests for changes, and a CI started.

label

Mar 17, 2018

addaleax added a commit that referenced this pull request

Mar 17, 2018
82bdf8f fixed an issue by silently modifying the `start`
option for the case when only `end` is passed, in order to perform
reads from a specified range in the file.

However, that approach does not work for non-seekable files, since
a numeric `start` option means that positioned reads will be used
to read data from the file.

This patch fixes that, and instead ends reading after a specified
size by adjusting the read buffer size.

This way we avoid re-introducing the bug that 82bdf8f fixed,
and align behaviour with the native file stream mechanism
introduced in #18936 as well.

PR-URL: #19329
Fixes: #19240
Refs: #18121
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Chen Gang <gangc.cxy@foxmail.com>

addaleax added a commit to addaleax/node that referenced this pull request

Mar 17, 2018
82bdf8f fixed an issue by silently modifying the `start`
option for the case when only `end` is passed, in order to perform
reads from a specified range in the file.

However, that approach does not work for non-seekable files, since
a numeric `start` option means that positioned reads will be used
to read data from the file.

This patch fixes that, and instead ends reading after a specified
size by adjusting the read buffer size.

This way we avoid re-introducing the bug that 82bdf8f fixed,
and align behaviour with the native file stream mechanism
introduced in nodejs#18936 as well.

PR-URL: nodejs#19329
Fixes: nodejs#19240
Refs: nodejs#18121
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Chen Gang <gangc.cxy@foxmail.com>

addaleax added a commit to addaleax/node that referenced this pull request

Mar 17, 2018
82bdf8f fixed an issue by silently modifying the `start`
option for the case when only `end` is passed, in order to perform
reads from a specified range in the file.

However, that approach does not work for non-seekable files, since
a numeric `start` option means that positioned reads will be used
to read data from the file.

This patch fixes that, and instead ends reading after a specified
size by adjusting the read buffer size.

This way we avoid re-introducing the bug that 82bdf8f fixed,
and align behaviour with the native file stream mechanism
introduced in nodejs#18936 as well.

PR-URL: nodejs#19329
Fixes: nodejs#19240
Refs: nodejs#18121
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Chen Gang <gangc.cxy@foxmail.com>

This was referenced

Mar 17, 2018

addaleax added a commit that referenced this pull request

Mar 17, 2018
82bdf8f fixed an issue by silently modifying the `start`
option for the case when only `end` is passed, in order to perform
reads from a specified range in the file.

However, that approach does not work for non-seekable files, since
a numeric `start` option means that positioned reads will be used
to read data from the file.

This patch fixes that, and instead ends reading after a specified
size by adjusting the read buffer size.

This way we avoid re-introducing the bug that 82bdf8f fixed,
and align behaviour with the native file stream mechanism
introduced in #18936 as well.

PR-URL: #19329
Fixes: #19240
Refs: #18121
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Chen Gang <gangc.cxy@foxmail.com>

MylesBorins pushed a commit that referenced this pull request

Mar 20, 2018
82bdf8f fixed an issue by silently modifying the `start`
option for the case when only `end` is passed, in order to perform
reads from a specified range in the file.

However, that approach does not work for non-seekable files, since
a numeric `start` option means that positioned reads will be used
to read data from the file.

This patch fixes that, and instead ends reading after a specified
size by adjusting the read buffer size.

This way we avoid re-introducing the bug that 82bdf8f fixed,
and align behaviour with the native file stream mechanism
introduced in #18936 as well.

Backport-PR-URL: #19411
PR-URL: #19329
Fixes: #19240
Refs: #18121
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Chen Gang <gangc.cxy@foxmail.com>

MylesBorins pushed a commit that referenced this pull request

Mar 20, 2018
82bdf8f fixed an issue by silently modifying the `start`
option for the case when only `end` is passed, in order to perform
reads from a specified range in the file.

However, that approach does not work for non-seekable files, since
a numeric `start` option means that positioned reads will be used
to read data from the file.

This patch fixes that, and instead ends reading after a specified
size by adjusting the read buffer size.

This way we avoid re-introducing the bug that 82bdf8f fixed,
and align behaviour with the native file stream mechanism
introduced in #18936 as well.

Backport-PR-URL: #19410
PR-URL: #19329
Fixes: #19240
Refs: #18121
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Chen Gang <gangc.cxy@foxmail.com>

MylesBorins pushed a commit that referenced this pull request

Mar 20, 2018
82bdf8f fixed an issue by silently modifying the `start`
option for the case when only `end` is passed, in order to perform
reads from a specified range in the file.

However, that approach does not work for non-seekable files, since
a numeric `start` option means that positioned reads will be used
to read data from the file.

This patch fixes that, and instead ends reading after a specified
size by adjusting the read buffer size.

This way we avoid re-introducing the bug that 82bdf8f fixed,
and align behaviour with the native file stream mechanism
introduced in #18936 as well.

PR-URL: #19329
Fixes: #19240
Refs: #18121
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Chen Gang <gangc.cxy@foxmail.com>

MylesBorins pushed a commit that referenced this pull request

Mar 28, 2018
82bdf8f fixed an issue by silently modifying the `start`
option for the case when only `end` is passed, in order to perform
reads from a specified range in the file.

However, that approach does not work for non-seekable files, since
a numeric `start` option means that positioned reads will be used
to read data from the file.

This patch fixes that, and instead ends reading after a specified
size by adjusting the read buffer size.

This way we avoid re-introducing the bug that 82bdf8f fixed,
and align behaviour with the native file stream mechanism
introduced in #18936 as well.

Backport-PR-URL: #19411
PR-URL: #19329
Fixes: #19240
Refs: #18121
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Chen Gang <gangc.cxy@foxmail.com>

MylesBorins pushed a commit that referenced this pull request

Mar 28, 2018
82bdf8f fixed an issue by silently modifying the `start`
option for the case when only `end` is passed, in order to perform
reads from a specified range in the file.

However, that approach does not work for non-seekable files, since
a numeric `start` option means that positioned reads will be used
to read data from the file.

This patch fixes that, and instead ends reading after a specified
size by adjusting the read buffer size.

This way we avoid re-introducing the bug that 82bdf8f fixed,
and align behaviour with the native file stream mechanism
introduced in #18936 as well.

Backport-PR-URL: #19410
PR-URL: #19329
Fixes: #19240
Refs: #18121
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Chen Gang <gangc.cxy@foxmail.com>

MylesBorins pushed a commit that referenced this pull request

Mar 30, 2018
82bdf8f fixed an issue by silently modifying the `start`
option for the case when only `end` is passed, in order to perform
reads from a specified range in the file.

However, that approach does not work for non-seekable files, since
a numeric `start` option means that positioned reads will be used
to read data from the file.

This patch fixes that, and instead ends reading after a specified
size by adjusting the read buffer size.

This way we avoid re-introducing the bug that 82bdf8f fixed,
and align behaviour with the native file stream mechanism
introduced in #18936 as well.

Backport-PR-URL: #19411
PR-URL: #19329
Fixes: #19240
Refs: #18121
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Chen Gang <gangc.cxy@foxmail.com>

MylesBorins pushed a commit that referenced this pull request

Mar 30, 2018
82bdf8f fixed an issue by silently modifying the `start`
option for the case when only `end` is passed, in order to perform
reads from a specified range in the file.

However, that approach does not work for non-seekable files, since
a numeric `start` option means that positioned reads will be used
to read data from the file.

This patch fixes that, and instead ends reading after a specified
size by adjusting the read buffer size.

This way we avoid re-introducing the bug that 82bdf8f fixed,
and align behaviour with the native file stream mechanism
introduced in #18936 as well.

Backport-PR-URL: #19410
PR-URL: #19329
Fixes: #19240
Refs: #18121
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
Reviewed-By: Chen Gang <gangc.cxy@foxmail.com>

This was referenced

Feb 24, 2020