Fix Encoding/Escaping according to the InfluxDb Line-Protocol

[dangoodman]

Description

This PR contains the following changes:

1. Don't quote tags, since quotes become a part of it in this case.
2. Pass rust ints as influxdb ints. In other case they are treated as floats.
3. Other escaping rules according to the influxdb line protocol reference.

Tested it on ~1.2 million records during a conversion from mongodb. Better than nothing.

Fixes #52, closes #53

Checklist

• Formatted code using cargo fmt --all
• Linted code using clippy cargo clippy --all-targets --all-features -- -D warnings
• Updated README.md using cargo readme > README.md
• Reviewed the diff. Did you leave any print statements or unnecessary comments?
• Any unfinished work that warrants a separate issue captured in an issue with a TODO code comment

[dangoodman]

Travis fails with

error[E0433]: failed to resolve: could not find `__rt` in `quote`
   --> /home/travis/.cargo/registry/src/github.1485827954.workers.dev-1ecc6299db9ec823/failure_derive-0.1.6/src/lib.rs:107:70
    |
107 | fn display_body(s: &synstructure::Structure) -> Result<Option<quote::__rt::TokenStream>, Error> {
    |                                                                      ^^^^ could not find `__rt` in `quote`

It doesn't seem to be related to changes in this PR. By the way, all tests are green, including the integration ones, at least on my PC. Do you have an idea how we can deal with it?

[Empty2k12]

Thanks for opening this PR 🚀

It doesn't seem to be related to changes in this PR. By the way, all tests are green, including the integration ones, at least on my PC. Do you have an idea how we can deal with it?

I found this resource from Rust announcements, apparently over 800 Crates are affected by this 😓

When the CI passes I will give this PR a thorough review and merge it. Am I seeing it right, that this should close #53?

[dangoodman]

Ah, ok. Hopefully will be fixed some day.

Well, this PR deals with spaces for sure.

\n's aren't supported by the line protocol. Might be a good idea to add a check for that.

\r and \t aren't mentioned in the docs. So needs more tests to figure out a way to handle them.

[Empty2k12]

Spotless and well written code with tests 👍

I'm fine with merging it like this, unless you want to add a check for line breaks and tabs, but since InfluxDb don't mention them, I don't think that's strictly necessary.

[dangoodman]

Thank you for the fast response. I will test how it works with \r's and \t's once have time, maybe on the next week, and file a new PR if it comes.

[Empty2k12]

Thank you, feel free to open more issues for any issues you encounter or features you're missing from the library :)

[satirebird]

I tested the PR and it works as expected. Thanks a lot for the work. 👍