flask-mongodb-example:Flask Web应用程序的简单示例，该应用程序连接到MongoDB实例并执行简单的

# Flash-MongoDB Example Web App Project currently hosted at https://i6.cims.nyu.edu/~ab1258/flask-mongodb-example/flask.cgi ## Database credentials The credentials for logging into a MongoDB database must be stored in a file named `.env`, which is not included in this repository for security reasons. 1. make a copy of the file named `env.example` and save it as `.env` 1. edit the `.env` file and enter your own database credentials into each of the variables where indicated ## Run locally To run this app locally, do the following: ### Set up a Python virtual environment This command creates a new virtual environment with the name `.venv`: ```bash python3 -m venv .venv ``` #### Activate the virtual environment To activate the virtual environment named `.venv`... On Windows, run: ```bash .venv\Scripts\activate.bat ``` On Mac, run: ```bash source .venv/bin/activate ``` #### Install the dependencies into the virtual environment The file named, `requirements.txt` contains a list of dependencies - other software modules that this app depends upon to run. To install the dependencies into the currently-active virtual environment, use `pip`, the default Python "package manager" - software that takes care of installing the correct version of any module into your in the correct place for the current environment. ```bash pip3 install -r requirements.txt ``` ### Run the app 1. define two environment variables from the command line: `export FLASK_APP=myapp` and `export FLASK_ENV=development` 1. start flask with `flask run` - this will output an address at which the app is running locally, e.g. https://127.0.0.1:5000. Visit that address in a web browser. ## Host on a web server The following steps outline how to host this application on NYU's **i6**.cims.nyu.edu web server. Other servers may vary. 1. Familiarize yourself with web hosting steps on a CIMS server from the link: https://cims.nyu.edu/webapps/content/systems/userservices/webhosting. 1. Use a file transfer program, such as Cyberduck, to copy your entire project directory to the `/home/$USER/public_html/` directory, where `$USER` is replaced by your own username. 1. Make the files named `flask.cgi` and `myapp.py` executable by all with the command, `chmod u+x flask.cgi` and `chmod u+x myapp.py`. 1. Your app should now be live at https://i6.cims.nyu.edu/~$USER/$flask-app-directory/flask.cgi, where `$USER` is replaced with your own **i6** username and `$flask-app-directory` is replaced with the name of the sub-directory within `public_html` where your flask app code resides.