Read a log file in R - json

Question

I'm trying to read a log file in R.
It looks like an extract from a JSON file to me, but when trying to read it using jsonlite I get the following error message: "Error: parse error: trailing garbage".
Here is how my log file look like:
{"date":"2017-05-11T04:37:15.587Z","userId":"admin","module":"Quote","action":"CreateQuote","identifier":"-.admin1002"},
{"date":"2017-05-11T05:12:24.939Z","userId":"a145fhyy","module":"Quote","action":"Call","identifier":"RunUY"},
{"date":"2017-05-11T05:12:28.174Z","userId":"a145fhyy","license":"named","usage":"External","module":"Catalog","action":"OpenCatalog","identifier":"wks.klu"},
Has you can see, the column name is precised directly in front of the content for each line (e.g: "date": or "action":)
And some line can skip some columns and add some other.
What I want to get as output would be to have 7 columns with the corresponding data filled in each:
date
userId
license
usage
module
action
identifier
Does anyone has a suggestion about how to get there?
Thanks a lot in advance
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Thanks everyone for your answers. Here are some precisions about my issue:
The data that I gave as example in an extract of one of my log files. I've got a lot of them that I need to read as one unique table.
I haven't added any commas or anything to it.
#r2evans
I've tried the following:
Log3 <-read.table("/Projects/data/analytics.log.agregated.2017-05‌​-11.log") jsonlite::stream_in(textConnection(gsub(",$","",Log3)))
It returns the following error:
Error: lexical error: invalid char in json text.
c(17, 18, 19, 20, 21, 22, 23, 2
(right here) ------^
I'm not sure how to use sed -e 's/,$//g' infile > outfile and Sys.which("sed"), that something I'm not familiar with. I'm looking into it, but if you have anymore precisions to give me about the usage of it that would be great.

Answer 1

I have saved your example as a file "test.json" and was able to read and parse it like this:
library(jsonlite)
rf <- read_file("test.json")
rfr <- gsub("\\},", "\\}", rf)
data <- stream_in(textConnection(rfr))
It parses and simplifies into a neat data frame exactly like you want. What I do is look for "}," rather than ",$", because the very last comma is not (necessarily) followed by a newline character(s).
However, this might not be the best solution for very large files.. For those you may need to first look for a way to modify the text file itself by getting rid of the commas. Or, if that's possible, ask the people who exported this file to export it in a normal ndjson format:-)