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Tizen 2016 TV's throw TypeError: JSON.stringify cannot serialize cyclic structures #935

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chrisfillmore opened this issue Jul 19, 2017 · 2 comments
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Tizen 2016 TV's throw TypeError: JSON.stringify cannot serialize cyclic structures #935

chrisfillmore opened this issue Jul 19, 2017 · 2 comments
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@TheModMaker
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platform: TV/STB Issues affecting smart TV or set-top box platforms status: archived Archived and locked; will not be updated type: enhancement New feature or request
Milestone
v2.3.0

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@chrisfillmore
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chrisfillmore commented Jul 19, 2017 •
edited

In ConfigUtils.cloneObject, Shaka clones objects by doing JSON.parse(JSON.stringify(arg)).

In PlayheadObserver.cloneTimelineInfo_, Shaka clones a TimelineRegionInfo using ConfigUtils.cloneObject. There is even a helpful comment saying:

// cloneObject uses JSON to clone, which won't copy the DOM element.
copy.eventElement = source.eventElement;

On Tizen 2016 TV's, it appears that this is not the case. JSON.stringify will attempt to serialize cyclic structures (the DOM element), and throws a TypeError as a result.

Fwiw 2016 TV's report this navigator.userAgent string:

Mozilla/5.0 (SMART-TV; Linux; Tizen 2.4.0) AppleWebKit/538.1 (KHTML, like Gecko) Version/2.4.0 TV Safari/538.1

I don't mind putting together a PR to address this. Perhaps a different cloneObject implementation is warranted? One which detects circular structures and compensates? I'm open to suggestions.
@joeyparrish
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Another clone implementation sounds reasonable. Using JSON.stringify is a giant hack anyway, so I don't mind seeing that go away.

@joeyparrish joeyparrish added type: enhancement New feature or request flag: seeking PR We are actively seeking PRs for this; we do not currently expect the core team will resolve this labels Jul 19, 2017
@joeyparrish joeyparrish added this to the v2.3.0 milestone Jul 19, 2017
@SemihGk SemihGk mentioned this issue Sep 14, 2017
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joeyparrish pushed a commit that referenced this issue Sep 26, 2017
@TheModMaker @joeyparrish
Use a custom cloneObject implementation.
06c9844 
Tizen 2016 throws when trying to use JSON to clone cyclic objects.  To
avoid this and to remove a hack to clone objects, this replaces it with
an explicit clone implementation.

Closes #935

Change-Id: Ia057e3f6853b813dd89fe33c291b558b71534726
@joeyparrish joeyparrish removed the flag: seeking PR We are actively seeking PRs for this; we do not currently expect the core team will resolve this label Sep 26, 2017
@joeyparrish
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The fix has been cherry-picked to v2.2.x and will be released in v2.2.2.

@shaka-project shaka-project locked and limited conversation to collaborators Mar 22, 2018
@joeyparrish joeyparrish added the platform: TV/STB Issues affecting smart TV or set-top box platforms label Jul 17, 2018
@shaka-bot shaka-bot added the status: archived Archived and locked; will not be updated label Apr 15, 2021
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Labels
platform: TV/STB Issues affecting smart TV or set-top box platforms status: archived Archived and locked; will not be updated type: enhancement New feature or request
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Milestone
v2.3.0
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@TheModMaker @joeyparrish @chrisfillmore @shaka-bot