120 lines
3.1 KiB
Markdown
120 lines
3.1 KiB
Markdown
# RTEX Engine
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RTEX Engine (Acronym for Real-Time Execution Engine)
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is a real-time execution engine for the execution of
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instructions represented in associative arrays in
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a controlled environment. RTEX is designed to
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be used in such environments where you are automating
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the task of creating scripts for your program to run,
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or you are executing programs written by users,
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but you don't want to give them the ability to
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execute arbitrary code on your system
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## How does it work?
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RTEX Engine operates on the simple principle of executing
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instructions in order, and then moving on to the next
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instruction.
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### Instructions
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Instructions are simply associative arrays that contain
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information about the instruction to be executed. The
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engine will then execute the instruction, and then
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return the context back to the caller.
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***Note:*** The below is just an example of what an instruction
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might look like. The actual instructions are not implemented
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RTEX Engine provides a limited set of instructions by default
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allowing for basic functionality and operations, the builtin
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functions do not provide a way to interact with the host
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system or the filesystem, but you can extend the engine
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with your own methods and namespaces
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#### JSON Representation
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Since instructions are associative arrays, they can be
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represented in JSON, which is a common format for data
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transfer. The following is an example of a set of
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instructions that is shown above in JSON format:
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```json
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[
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{
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"type": "set",
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"_": {
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"key": "foo",
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"value": "bar"
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}
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},
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{
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"type": "invoke",
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"_": {
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"method": "http.get",
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"parameters": {
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"url": "https://example.com",
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"parameters": {
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"username": {
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"type": "get",
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"_": {
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"variable": "foo"
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}
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},
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"password": {
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"type": "get",
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"_": {
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"variable": "bar"
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}
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}
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}
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}
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}
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},
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{
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"type": "return",
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"_": {
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"type": "get",
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"_": {
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"variable": "http_response_body"
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}
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}
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}
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]
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```
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### Methods & Namespaces
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Methods are different to instructions in the terms
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that RTEX can only expand its functionality by
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creating a library works as a plugin that can be
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imported by RTEX before executing the program.
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Namespaces are used to avoid conflicting with
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already existing method names and to make things
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more organized, for example there could be a
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namespace called `http` which contains methods
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such as `get`, `post`, `put`, `delete`, etc. which
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can be invoked by the engine via the `invoke`
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instruction, methods are not the same as instructions
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as they are not executed in order, they are executed
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when they are invoked.
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***Note:*** This functionality is a WIP, more
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information will be added as it is implemented
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# License
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RTEX Engine is licensed under the MIT License, see
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[LICENSE](LICENSE) for more information
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# Contributing
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If you would like to contribute to RTEX Engine,
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please read [CONTRIBUTING.md](CONTRIBUTING.md)
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for more information
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