/
server.js
70 lines (58 loc) · 2.88 KB
/
server.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
var express = require("express"),
https = require("https"),
pg = require("pg"),
app = express(),
client = new pg.Client(process.env.ECON_DB);
app.use(function(req, res, next) {
res.header("Access-Control-Allow-Origin", "*");
res.header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
next();
});
client.connect(function(err) {
if (err) return console.error("could not connect to postgres", err);
});
app.listen(process.env.ECON_PORT);
app.get("/econ/api/countries", function(req, res) {
client.query("SELECT * FROM countries ORDER BY name", function(err, result) {
if (err) return console.error("error:", err);
res.json(result.rows);
});
});
app.get("/econ/api/countries/:code/imports", function(req, res) {
client.query("SELECT year, count(*), sum(export_val) AS summed FROM trades WHERE destination=$1 GROUP BY year ORDER BY year ASC", [req.params.code], function(err, result) {
if (err) return console.error("error:", err);
res.json(result.rows);
});
});
app.get("/econ/api/countries/:code/imports/:year", function(req, res) {
client.query(
"SELECT sum(trade.export_val) AS summed, product.short_code, product.name FROM trades AS trade INNER JOIN products AS product ON trade.product = product.short_code WHERE trade.destination=$1 AND trade.year=$2 GROUP BY product.name, product.short_code ORDER BY summed DESC", [req.params.code, req.params.year], function(err, result) {
if (err) return console.error("error:", err);
res.json(result.rows);
});
});
app.get("/econ/api/countries/:code/exports", function(req, res) {
client.query("SELECT year, count(*), sum(export_val) AS summed FROM trades WHERE origin=$1 GROUP BY year ORDER BY year ASC", [req.params.code], function(err, result) {
if (err) return console.error("error:", err);
res.json(result.rows);
});
});
app.get("/econ/api/countries/:code/exports/:year", function(req, res) {
client.query("SELECT sum(trade.export_val) AS summed, product.short_code, product.name FROM trades AS trade INNER JOIN products AS product ON trade.product = product.short_code WHERE trade.origin=$1 AND trade.year=$2 GROUP BY product.name, product.short_code ORDER BY summed DESC", [req.params.code, req.params.year], function(err, result) {
if (err) return console.error("error:", err);
res.json(result.rows);
});
});
app.get("/econ/api/products", function(req, res) {
client.query("SELECT * FROM products WHERE short_code < 9999", function(err, result) {
if (err) return console.error("error:", err);
res.json(result.rows);
});
});
app.get("/econ/api/trades", function(req, res) {
var cc = req.query.country_code, pc = req.query.product_code;
client.query("SELECT * from trades WHERE (origin = $1 OR destination = $1) AND product = $2", [cc, pc], function(err, result) {
if (err) return console.error("error:", err);
res.json(result.rows);
});
});