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diff --git a/README.md b/README.md deleted file mode 100644 index 04146f59..00000000 --- a/README.md +++ /dev/null @@ -1,130 +0,0 @@ -<h1 align="center"> - <img src="images/logo.png" width="100" alt="OpenDC"> - <br> - OpenDC Web Server -</h1> -<p align="center"> -Collaborative Datacenter Simulation and Exploration for Everybody -</p> - -The OpenDC web server is the bridge between OpenDC's frontend and database. It is built with Flask/SocketIO in Python and implements the OpenAPI-compliant [OpenDC API specification](https://github.com/atlarge-research/opendc/blob/master/opendc-api-spec.json). - -This document explains a high-level view of the web server architecture ([jump](#architecture)), and describes how to set up the web server for local development ([jump](#setup-for-local-development)). - -## Architecture - -The following diagram shows a high-level view of the architecture of the OpenDC web server. Squared-off colored boxes indicate packages (colors become more saturated as packages are nested); rounded-off boxes indicate individual components; dotted lines indicate control flow; and solid lines indicate data flow. - - - -The OpenDC API is implemented by the `Main Server Loop`, which is the only component in the base package. - -### Util Package - -The `Util` package handles several miscellaneous tasks: - -* `REST`: Parses SockerIO messages into `Request` objects, and calls the appropriate `API` endpoint to get a `Response` object to return to the `Main Server Loop`. -* `Param Checker`: Recursively checks whether required `Request` parameters are present and correctly typed. -* `Exceptions`: Holds definitions for exceptions used throughout the web server. -* `Database API`: Wraps SQLite functionality used by `Models` to read themselves from/ write themselves into the database. - -### API Package - -The `API` package contains the logic for the HTTP methods in each API endpoint. Packages are structured to mirror the API: the code for the endpoint `GET simulations/authorizations`, for example, would be located at the `Endpoint` inside the `authorizations` package, inside the `simulations` package (so at `api/simulations/authorizations/endpoint.py`). - -An `Endpoint` contains methods for each HTTP method it supports, which takes a request as input (such as `def GET(request):`). Typically, such a method checks whether the parameters were passed correctly (using the `Param Checker`); fetches some model from the database; checks whether the data exists and is accessible by the user who made the request; possibly modifies this data and writes it back to the database; and returns a JSON representation of the model. - -The `REST` component dynamically imports the appropriate method from the appropriate `Endpoint`, according to request it receives, and executes it. - -### Models Package - -The `Models` package contains the logic for mapping Python objects to their database representations. This involves an abstract `model` which has methods to `read`, `insert`, `update` and `delete` objects. Extensions of `model`, such as a `User` or `Simulation`, specify some metadata such as their tabular representation in the database and how they map to a JSON object, which the code in `model` uses in the database interaction methods. - -`Endpoint`s import these `Models` and use them to execute requests. - -## Setup for Local Development - -The following steps will guide you through setting up the OpenDC web server locally for development. To test individual endpoints, edit `static/index.html`. This guide was tested and developed on Windows 10. - -### Local Setup - -#### Install requirements - -Make sure you have Python 2.7 installed (if not, get it [here](https://www.python.org/)), as well as pip (if not, get it [here](https://pip.pypa.io/en/stable/installing/)). Then run the following to install the requirements. - -```bash -python setup.py install -``` - -The web server also requires MariaDB >= 10.1. Instructions to install MariaDB can be found [here](https://mariadb.com/kb/en/mariadb/getting-installing-and-upgrading-mariadb/). The Docker image can be found [here](https://hub.docker.com/_/mariadb/). - -#### Get the code - -Clone both this repository and the main OpenDC repository, from the same base directory. - -```bash -git clone https://github.com/atlarge-research/opendc-web-server.git -git clone https://github.com/atlarge-research/opendc.git -``` - -#### Set up the database - -The database can be rebuilt by using the `schema.sql` file from main opendc repository. - -#### Configure OpenDC - -Create a file `config.json` in `opendc-web-server`, containing: - -```json -{ - "ROOT_DIR": "BASE_DIRECTORY", - "OAUTH_CLIENT_ID": "OAUTH_CLIENT_ID", - "FLASK_SECRET": "FLASK_SECRET", - "MYSQL_DATABASE": "opendc", - "MYSQL_USER": "opendc", - "MYSQL_PASSWORD": "opendcpassword", - "MYSQL_HOST": "127.0.0.1", - "MYSQL_PORT": 3306 -} -``` - -Make the following replacements: -* Replace `BASE_DIRECTORY` with the base directory in which you cloned `opendc` and `opendc-web-server`. -* Replace `OAUTH_CLIENT_ID` with your OAuth client ID (see the [OpenDC README](https://github.com/atlarge-research/opendc#preamble)). -* Replace `FLASK_SECRET`, come up with some string. -* Replace the `MYSQL_*` variables with the correct settings for accessing the MariaDB database that was just created. - -In `opendc-web-server/static/index.html`, add your own `OAUTH_CLIENT_ID` in `content=` on line `2`. - -#### Set up Postman and OpenDC account - -To easily make HTTP requests to the web server, we recommend Postman (get it [here](https://www.getpostman.com/)). - -Once Postman is installed and set up, `Import` the OpenDC requests collection (`OpenDC.postman_collection.json`). In the `Collections` tab, expand `OpenDC` and click `Create New User`. This should open the request in the `Builder` pane. - -Navigate to `http://localhost:8081/my-auth-token` and copy the authentication token on this page to your clipboard. In the Postman `Builder` pane, navigate to the `Headers (2)` tab, and paste the authentication token as value for the `auth-token` header. (This token expires every hour - refresh the auth token page to get a new token.) - -(Optional: navigate to the `Body` tab and change the email address to the gmail address you used to get an authentication token.) - -Click `Send` in Postman to send your request and see the server's response. If it's a `200`, your account is set up! - -### Local Development - -Run the server. - -```bash -cd opendc-web-server -python main.py config.json -``` - -To try a different query, use the Postman `Builder` to edit the method, path, body, query parameters, etc. `Create New Simulation` is provided as an additional example. - -When editing the web server code, restart the server (`CTRL` + `c` followed by `python main.py config.json` in the console running the server) to see the result of your changes. - -#### Code Style - -To format all files, run `format.sh` in this directory. - -#### Testing - -Run `pytest` in this directory to run all tests. |