## http://heliopropa.irap.omp.eu

# What


### Rationale

- Reading NetCDF from javascript is doable, but still *very* hacky.
- The bridge can handle pagination and collecting multiple NetCDF into one CSV.


# How

## Source

https://gitlab.irap.omp.eu/CDPP/SPACEWEATHERONLINE


## Install

### Prerequisites
gcc
libncurses-dev
python3
python3-virtualenv
libapache2-mod-wsgi-py3
### CentOs 6 Shenanigans

``` bash
yum install https://centos6.iuscommunity.org/ius-release.rpm
yum install python27*
```

But then `virtualenv` yields

```
File "/var/www/html/HELIOPROPA/web/run.py", line 24, in <module>
[Fri Nov 30 14:30:38 2018] [error] [client 10.10.135.119]     from netCDF4 import Dataset, date2num
[Fri Nov 30 14:30:38 2018] [error] [client 10.10.135.119]   File "/var/www/html/HELIOPROPA/venv/lib/python2.7/site-packages/netCDF4/__init__.py", line 3, in <module>
[Fri Nov 30 14:30:38 2018] [error] [client 10.10.135.119]     from ._netCDF4 import *
[Fri Nov 30 14:30:38 2018] [error] [client 10.10.135.119] ImportError: /var/www/html/HELIOPROPA/venv/lib/python2.7/site-packages/netCDF4/_netCDF4.so: undefined symbol: PyUnicodeUCS2_FromStringAndSize
```

_Solution:_
Configure Apache to use `web/run_ssa.wsgi` and use pip2.7 install system wide.


### Install libcdf.

``` bash
wget https://spdf.gsfc.nasa.gov/pub/software/cdf/dist/cdf38_1/cdf38_1-dist-all.tar.gz
tar -xzvf cdf38_1-dist-all.tar.gz
cd cdf38_1-dist
make all OS=linux ENV=gnu
make INSTALLDIR=/usr/local/lib/libcdf install
```


## Troubleshoot

### Installing scipy

Getting `MemoryErrors` ?
Try with the `--no-cache-dir` option.

`pip install scipy --no-cache-dir`

### Fix permissions problems with the cache

```
sudo setfacl  -R -m u:apache:rwx -m u:`whoami`:rwx cache
sudo setfacl -dR -m u:apache:rwx -m u:`whoami`:rwx cache
```