1. use [staticcheck](https://staticcheck.io/) to check the code, and fix some issues.
2. use `go fmt` to format the code.
3. use `go mod tidy` clean the go mod.
Notable refactoring:
- Use stdlib "context" in place of "golang.org/x/net/context"
- Go-kit no longer wraps errors, so we remove the unwrap in transport_error.go
- Use MakeHandler when setting up endpoint tests (fixes test bug caught during
this refactoring)
Closes#1411.
As of recently, osquery will report when a distributed query fails. We now
expose errors over the results websocket. When a query errored on the host, the
`error` key in the result will be non-null. Note that osquery currently doesn't
provide any details so the error string will always be "failed". I anticipate
that we will fix this and the string is included for future-proofing.
Successful result:
```
{
"type": "result",
"data": {
"distributed_query_execution_id": 15,
"host": {
... omitted ...
},
"rows": [
{
"hour": "1"
}
],
"error": null
}
}
```
Failed result:
```
{
"type": "result",
"data": {
"distributed_query_execution_id": 14,
"host": {
... omitted ...
},
"rows": [
],
"error": "failed"
}
}
```
- Introduce a new pattern for defining/ingesting detail queries
- Add many relevant host details:
- Platform
- osquery Version
- Memory
- Hostname
- UUID
- OS Version
- Uptime
- Primary interface MAC
- Primary interface IP
- Fix parsing for inconsistent JSON schema returned from osquery
- Tests
- Establish a pattern for host authentication
- Establish a pattern for error JSON
- Add transport and make endpoint functions
- Fix discovered bugs + update tests
