[THRIFT-4436] Deserialization of nested list discards content

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.10.0, 0.11.0
• Fix Version/s: 0.12.0
• Component/s: JavaScript - Library
• Assignee: James E. King III
• Reporter: Philip Frank
• Created: 27/Dec/17 08:41
• Updated: 27/Dec/18 15:25
• Resolved: 05/Mar/18 13:21

Description

I'm trying to transmit a list of lists, like this:

service HelloSvc {
  list<list<string>> test()
}

Using XHR Transport and JSON Protocol, with a service implementation in Python like this:

class HelloSvcHandler:
    def __init__(self):
        pass

    def test(self,):
        return [
            ["s1", "s2"],
            ["s3", "s4"],
            ["s5"]
        ]

The serialized response looks good to me (seen in browser development tools):

[1,"test",2,0,{"0":{"lst":["lst",3,["str",2,"s1","s2"],["str",2,"s3","s4"],["str",1,"s5"]]}}]

However, when deserialized to JavaScript, the result looks like this:

[["s1","s2"],[],[]]

I would expect it to look like this:

[["s1","s2"],["s3","s4"],["s5"]]

It looks to me like during JSON deserialization, all but the first entry in the list of lists lose their content.

Issue Links

• depends upon: THRIFT-3748 Node.js Deserialization of lists of lists is broken
• links to: GitHub Pull Request #1454
• links to: GitHub Pull Request #1457