Initial commit

Author: erikap

.gitignore

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+*~
+node_modules/

Dockerfile

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+FROM semtech/mu-javascript-template:1.0.0
+
+MAINTAINER Erika Pauwels <erika.pauwels@gmail.com>

LICENSE

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+The MIT License (MIT)
+
+Copyright (c) 2016 
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+Export JS Template
+==================
+
+Microservice to export data using custom defined SPARQL queries.
+
+
+## Using the template
+Extend the `semtech/mu-export-js-template` and add an export configuration in `/config/queries.js`.
+
+The configuration file defines an array of export configuration objects as follows:
+
+```javascript
+export default [
+    {
+        path: '/all',
+        format: 'text/csv',
+        file: 'export-100.csv',        
+        query: `SELECT * FROM <http://mu.semte.ch/application> WHERE { ?s ?p ?o } LIMIT 100`
+    },
+    ...
+];
+
+```
+
+An export configuration object consists of the following properties:
+* [REQUIRED] `path`: endpoint on which the export will be exposed
+* [REQUIRED] `format`: format of the export (`application/json`, `text/csv`, etc.)
+* [OPTIONAL] `file`: name of the attachment file containing the export. If no filename is provided, the export will be displayed inline in the browser.
+* [REQUIRED] `query`: the SPARQL query to execute. This may be a `SELECT` or a `CONSTRUCT` query.
+
+## Example Dockerfile
+
+```
+FROM semtech/mu-export-js-template:1.0.0
+MAINTAINER Erika Pauwels <erika.pauwels@gmail.com>
+COPY queries.js /config
+```

app.js

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+import { app } from 'mu';
+import request from 'request';
+
+import queries from '/config/queries';
+
+queries.map(function(config) {
+    app.get(config.path, function(req, res, next) {
+        const options = {
+            method: 'POST',
+            url: process.env.MU_SPARQL_ENDPOINT,
+            encoding: 'utf8',
+            headers: {
+                'Accept': config.format
+            },
+            qs: {
+                format: config.format,
+                query: config.query
+            }
+        };
+        
+        request(options, function(error, response, body) {
+            if (error) {
+                console.error(`Something went wrong executing the SPARQL query: ${JSON.stringify(error)}`);
+                next(error);
+            } else if (response.statusCode == 200) {
+                if (config.file) { res.attachment(config.file); }
+                res.send(body);
+            } else {
+                next(new Error(body));
+            }
+        });
+    } );    
+});