Support HTTP POST request for update operations in SentinelApiClient of Sentinel dashboard

[jasonjoo2010]

Describe what this PR does / why we need it

Feature for transport module: Make transport-netty-http/transport-simple-http support posting (split to #667)

For dashboard:

• Restructure: refine SentinelApiClient to support posting and make it simple
• Enhancement: SentinelVersion parsing logic
• Bug fix: comparison bug of SentinelVersion

Does this pull request fix one issue?

Relevant issue #618

Describe how you did it

Make netty-http support both form-encoded / multipart post requests.
Make simple-http support form-encoded. Multipart requests can also be support too if necessary.

Form-encoded would be the standard support for transport modules.

These have been split to #667

Describe how to verify it

Submit big rules collection. For example, more than 30 entries which will overflow the URI limitation in RFC.

[codecov-io]

Codecov Report

Merging #620 into master will decrease coverage by 0.03%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master     #620      +/-   ##
============================================
- Coverage      41.1%   41.06%   -0.04%     
- Complexity     1216     1332     +116     
============================================
  Files           267      284      +17     
  Lines          7854     8925    +1071     
  Branches       1062     1193     +131     
============================================
+ Hits           3228     3665     +437     
- Misses         4233     4794     +561     
- Partials        393      466      +73

Impacted Files	Coverage Δ	Complexity Δ
...a/csp/sentinel/slots/statistic/base/LeapArray.java	67.64% <0%> (-2.95%)	33% <0%> (-1%)
...a/com/alibaba/csp/sentinel/node/StatisticNode.java	56.17% <0%> (-1.13%)	28% <0%> (-1%)
.../alibaba/csp/sentinel/eagleeye/FastDateFormat.java	78.37% <0%> (ø)	6% <0%> (?)
...com/alibaba/csp/sentinel/eagleeye/TokenBucket.java	35.29% <0%> (ø)	1% <0%> (?)
...a/csp/sentinel/slots/statistic/base/Striped64.java	60.41% <0%> (ø)	10% <0%> (?)
...libaba/csp/sentinel/eagleeye/EagleEyeAppender.java	14.28% <0%> (ø)	1% <0%> (?)
...sentinel/eagleeye/EagleEyeRollingFileAppender.java	28.9% <0%> (ø)	11% <0%> (?)
...a/com/alibaba/csp/sentinel/eagleeye/StatEntry.java	20.21% <0%> (ø)	8% <0%> (?)
...om/alibaba/csp/sentinel/eagleeye/SyncAppender.java	53.57% <0%> (ø)	5% <0%> (?)
...ibaba/csp/sentinel/eagleeye/StatLogController.java	65.93% <0%> (ø)	5% <0%> (?)
... and 9 more

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[sczyh30]

Good job. I'll review these days :)

[sczyh30]

I've reviewed the code about setRules in SentinelApiClient and summarized the following compatibility table:

	transport server < 1.6.0	transport server >= 1.6.0
Dashboard < 1.6.0	GET	GET
Dashboard >= 1.6.0	GET	POST

So for setRules API, every version of transport server and dashboard is compatible. Is it correct? Just to confirm it :) @jasonjoo2010

[jasonjoo2010]

I've reviewed the code about setRules in SentinelApiClient and summarized the following compatibility table:

transport server < 1.6.0 transport server >= 1.6.0
Dashboard < 1.6.0 GET GET
Dashboard >= 1.6.0 GET POST
So for setRules API, every version of transport server and dashboard is compatible. Is it correct? Just to confirm it :) @jasonjoo2010

Not only for setRules but for All api with large data submitted like setRules

Yes.
Transport layer will support parameters in both GET and POST methods from 1.6.0.
While dashboard will only enable POST feature when the machine's transport >= 1.6.0.

[sczyh30]

And could you please split your commit into two parts, one about changes for the transport module, another for the dashboard. Commits about dashboard should be prefixed with dashboard: .

[CLAassistant]

All committers have signed the CLA.

[sczyh30]

LGTM

[sczyh30]

Thanks for contributing!