PyWPS example service
This is a simple example service written using PyWPS. It has been tested with QGIS 1.8.
Installation
The app depends on PyWPS and several other libraries that are listed in
requirements.txt
. You can install them with pip:
$ pip install -r requirements.txt
For Debian based systems you will need to install GDAL with:
$ sudo apt-get install python-gdal
For Windows systems install you need to install Shapely and GDAL by using Python Wheels. If you have Shapely already installed you might have to uninstall it and installed as a Wheel for it to work:
Download the corresponding wheel for Shapely: http://www.lfd.uci.edu/~gohlke/pythonlibs/#shapely Download the corresponding wheel for GDAL: http://www.lfd.uci.edu/~gohlke/pythonlibs/#gdal $ pip install wheel $ pip install Shapely?x.x.x?cpxx?none?win_xxx.whl $ pip install GDAL?x.x.x?cpxx?none?win_xxx.whl
Running
Simply run the python file:
$ python demo.py
Docker
The docker folder contains 2 subfolders, each subfolder contains a differente pywps implementation. Folder flask
has the default pywps-flask implementation using only Flask while folder nginx
implements pywps using Nginx and Green unicorn as WSGI server.
Docker-flask
To build the image (inside the folder with the Dockerfile):
$ docker build -t pywps4-demo:latest .
And to run it:
$ docker run -p 5000:5000 pywps4-demo:latest
Pywps will be available in the following URL:
$ http://localhost:5000
Docker-nginx
To build the image (inside the folder with the Dockerfile):
$ docker build -t pywps4-demo .
Gunicorn uses a set of workers to run pywps (normally workers = (2 * cpu) + 1
), the default value used was 5 but it can be overwritten by setting the env flag GU_WORKERS:
$ docker run -e GU_WORKERS=10 -p 80:80 -it pywps4-demo:nginx
In this case pywps (only the WPS) will be avalable on:
http://localhost