作者：dllen

protobuf-java-format
Converting Protocol Buffers data to Json and back with Gson Type Adapters
protobuf-to-json
Protobuf与Json的相互转化

心经原文：
观自在菩萨，行深般若波罗蜜多时，照见五蕴皆空，渡一切苦厄。

舍利子！色不异空，空不异色；色即是空，空即是色；受想行识，亦复如是。

舍利子！是诸法空相，不生不灭，不垢不净，不增不减。

是故空中无色，无受想行识，无眼耳鼻舌身意，无色声香味触法，无眼界，乃至无意识界。

无无明，亦无无明尽，乃至无老死，亦无老死尽，无苦集灭道。无智亦无得。

以无所得故，菩提萨埵，依般若波罗蜜多故，心无罣碍，无罣碍故，无有恐怖， 远离颠倒梦想，究竟涅槃。

三世诸佛，依般若波罗蜜多故，得阿耨多罗三藐三菩提。

故知般若波罗蜜多，是大神咒，是大明咒，是无上咒，是无等等咒，能除一切苦，真实不虚。

故说般若波罗蜜多咒，即说咒曰︰揭諦揭諦，波罗揭諦，波罗僧揭諦，菩提娑婆呵。

store ip ranges in Redis

It depends if you consider your IP ranges can overlap or not. If not, the solution is quite simple:

use a collection of hash to store providers data
use a zset to index the max value of your ranges
retrieve the (unique) range whose max value is greater than an IP
check the the min value of this range is lower than the IP

Example:

Here are my providers. Each of them are identified with an id. Please note I could add more properties attached to each provider:

hmset providers:1 name P1 min 3232235786 max 3232235826
OK
hmset providers:2 name P3 min 1232235786 max 1232235826
OK
hmset providers:3 name P3 min 2232235786 max 2232235826
OK
hmset providers:4 name P4 min 4232235786 max 4232235826
OK

Each time a provider is added in the system, an index must be maintained (manually: this is Redis, not a relational database). Score is the max value, member is the id of the range.

zadd providers:index 3232235826 1 1232235826 2 2232235826 3 4232235826 4
(integer) 4
zrange providers:index 0 -1
1) "2"
2) "3"
3) "1"
4) "4"

Now to query the unique range corresponding to an IP address, you need 2 roundtrips:

zrangebyscore providers:index 3232235787 +inf LIMIT 0 1
1) "1"
hgetall providers:1
1) "name"
2) "P1"
3) "min"
4) "3232235786"
5) "max"
6) "3232235826"

Then the client program just has to check that your IP is greater or equal than the minimum address of the returned range.