Commit graph

13 commits

Author SHA1 Message Date
Roman Khimov
e62a766058 state: move nil check down to stackitem JSON processing
We want to return real errors, not some generic thing for any kind of thing
happening.
2021-07-07 00:38:19 +03:00
Roman Khimov
5a9efcc654 stackitem: rework error handling
Return good named errors everywhere, export appropriate constants, make
errors.Is() work.
2021-07-07 00:18:00 +03:00
Roman Khimov
e34fa2e915 stackitem: limit JSONization nesting level
We can have very deep reference types and attempt to JSONize them can easily
lead to OOM (even though there are no recursive references inside). Therefore
we have to limit them. While regular ToJSON() is buffer size limited to
MaxSize, ToJSONWithTypes is not and limiting it to MaxSize output will require
substantial rewriting effort while not really providing fair result, MaxSize
is more about stack item size while its JSON representation can be much bigger
because of various overheads.

Initial thought was to limit it by element count based on
MaxIteratorResultItems, but the problem here is that we don't always have this
limit in contexts using ToJSONWithTypes (like notification event
marshaling). Thus we need some generic limit which would be fine for all
users.

We at the same time have maxJSONDepth used when deserializing from JSON, so
it can be used for marshaling as well, it's not often that we have deeper
structures in real results.

Inspired by neo-project/neo#2521.
2021-07-06 17:33:16 +03:00
Roman Khimov
6879cbcdcc stackitem: properly detect recursive references during serialization
If we're done with element it no longer can lead to recursion error, so fix
cases like `[arr, arr]` where we have two copies of `arr` trigger this error
for no good reason (there is no recursion there).
2021-07-06 17:10:31 +03:00
Anna Shaleva
f95bdd9cb5 vm: serialize + rune as \u002B for byte-contained stackitems
This commit fixes the following Go vs C# state diff:

block 74613: value mismatch for key EwAAAHN0cmVhbXMvDg==: eyJpZCI6MTQsInN0YXJ0IjoxNjIyNTAwMjAwMDAwLCJzdG9wIjoxNjIyNTAyMDAwMDAwLCJkZXBvc2l0IjoxMDAwMDAwMDAsInJlbWFpbmluZyI6MTAwMDAwMDAwLCJzZW5kZXIiOiJmeEY4RDl2ZFU3K0gwcDV3NTlyWllMNytNSlE9IiwicmVjaXBpZW50IjoiSVV6c3pveFV0S1NGVnlZRGczSmdTQTFlbTFNPSJ9 vs eyJpZCI6MTQsInN0YXJ0IjoxNjIyNTAwMjAwMDAwLCJzdG9wIjoxNjIyNTAyMDAwMDAwLCJkZXBvc2l0IjoxMDAwMDAwMDAsInJlbWFpbmluZyI6MTAwMDAwMDAwLCJzZW5kZXIiOiJmeEY4RDl2ZFU3XHUwMDJCSDBwNXc1OXJaWUw3XHUwMDJCTUpRPSIsInJlY2lwaWVudCI6IklVenN6b3hVdEtTRlZ5WURnM0pnU0ExZW0xTT0ifQ==

I.e.:
```
{"id":14,"start":1622500200000,"stop":1622502000000,"deposit":100000000,"remaining":100000000,"sender":"fxF8D9vdU7+H0p5w59rZYL7+MJQ=","recipient":"IUzszoxUtKSFVyYDg3JgSA1em1M="}
```
vs
```
{"id":14,"start":1622500200000,"stop":1622502000000,"deposit":100000000,"remaining":100000000,"sender":"fxF8D9vdU7\u002BH0p5w59rZYL7\u002BMJQ=","recipient":"IUzszoxUtKSFVyYDg3JgSA1em1M="}
```
2021-06-08 16:40:38 +03:00
Evgeniy Stratonikov
e5fbf04529 stackitem: escape control characters in ToJSON()
Decoding uses `json.Decoder` which handles everything for us.
2021-03-02 10:47:02 +03:00
Evgenii Stratonikov
18b331d765 stackitem: fix JSON encoding
Encode both `Buffer` and `ByteString` to UTF-8 bytes.
Follow https://github.com/neo-project/neo/pull/1715 .
2020-12-11 13:30:47 +03:00
Anna Shaleva
543fd58e93 vm: restrict map key size 2020-09-29 18:46:15 +03:00
Roman Khimov
fa5ff8dd95
Merge pull request #1242 from nspcc-dev/fix/json
Implement lossless stackitem to json conversion
2020-08-04 12:59:47 +03:00
Evgenii Stratonikov
9d6ce4bdcc stackitem: implement unmarshaling from JSON with types
Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
2020-07-31 16:07:16 +03:00
Evgenii Stratonikov
c16bb466a0 stackitem: implement marshaling to JSON with types
There are 2 kinds of JSON marshaling:
1. Lossy raw marshaling, when type information is lost and
    map keys are expected to be valid utf-8 strings.
2. Almost lossless marshaling, which can handle any non-recursive item.
    Interop value preserves only type.

This commit implements the second.

Signed-off-by: Evgenii Stratonikov <evgeniy@nspcc.ru>
2020-07-31 16:07:16 +03:00
Evgenii Stratonikov
5500195d58 stackitem: ensure map keys are a valid UTF-8 2020-07-30 12:37:32 +03:00
Evgenii Stratonikov
d836233352 stackitem: allow to (de-)serialize items to JSON
This commit implements behavior identical to that of C# `System.Json.*` interops.
2020-06-16 11:34:01 +03:00