Golang json parsing

Question

I have a json string like this:

    {
"offset":4224368,
"fcn_addr":4224368,
"fcn_last":4224408,
"size":2,
"opcode":"add byte [rax], al",
"bytes":"0000",
"type":"add",
"type_num":17,
"type2_num":0,
"flags":[
"entry0",
"sym._start",
"section_end..plt",
"section..text"
],
"comment":"WzEzXSB2YT0weDAwNDA3NTcwIHBhPTB4MDAwMDc1NzAgc3o9MTA5OTE4NiB2c3o9MTA5OTE4NiByd3g9LXIteCAudGV4dA=="
},
{
"offset":4224370,
"fcn_addr":4224368,
"fcn_last":4224408,
"size":2,
"opcode":"add byte [rax], al",
"bytes":"0000",
"type":"add",
"type_num":17,
"type2_num":0
}}

and i have created a struct

type DisassembleOutput struct {
    offset, fcn_addr, fcn_last, size int
    opcode, bytes string
}

i just want to save this json into the struct like this one. So the problem is in unmarshaling with encoding/json lib, i can't get it to work ( error is always unable to unmarshal json data into main.Disas structure). I'm a golang newbie btw.

EDIT:

This is actually the problem http://play.golang.org/p/cpYsnXa-b9. how to parse one by one items fromm [{ ... }]

score 1 · Answer 1 · answered Nov 21 '15 at 18:03

1

Export the field names by starting them with an uppercase letter:

type DisassembleOutput struct {
  Offset, Fcn_addr, Fcn_last, Size int
  Opcode, Bytes                    string
}

playground example

answered Nov 21 '15 at 18:03

Charlie Tumahai

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Thats helpful, thanks! and just one more thing, what would i have to do if json was like this [ { samejson here } ] ? Thanks again! – eax_rabb1t Nov 21 '15 at 18:23
I have updated the code on play golang with the actual question regarding my last comment, here's link http://play.golang.org/p/cpYsnXa-b9 – eax_rabb1t Nov 21 '15 at 18:30
1

Your example on the playground is not valid JSON as the error message indicates. Not sure what's intended. – Charlie Tumahai Nov 21 '15 at 18:53
It is a valid json, and i found a solution using https://mholt.github.io/json-to-go/. Thanks for answers anyway! – eax_rabb1t Nov 21 '15 at 19:06
Use http://jsonlint.com to ensure the JSON is valid. – Ivan Chau Nov 22 '15 at 03:46

Golang json parsing

1 Answers1