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run prettier
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@mikespub
mikespub committed Oct 15, 2021
1 parent 4fede5e commit bfb02e3
Showing 1 changed file with 105 additions and 91 deletions.
196 changes: 105 additions & 91 deletions index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -7,95 +7,109 @@
* See https://docs.aws.amazon.com/awsaccountbilling/latest/aboutv2/using-ppslong.html
*/
//https://cloud.google.com/functions/docs/bestpractices/networking
const https = require('https');
const agent = new https.Agent({keepAlive: true});
const https = require("https");
const agent = new https.Agent({ keepAlive: true });

const config = require('./config.json')
const config = require("./config.json");

//https://github.com/firebase/functions-samples/blob/master/quickstarts/time-server/functions/index.js
// CORS Express middleware to enable CORS Requests.
//const cors = require('cors')({
// origin: '*',
//});
var cachedAgent = function cachedAgent(req, res) {
method = req.method || 'GET';
path = req.path || '/offers/v1.0/aws/index.json';
// TODO: choose proxy config based on path prefix?
proxy = config[config['default']]
backend = proxy.backend || 'pricing.us-east-1.amazonaws.com';
origin = proxy.origin || '*';
if (path == '/') {
path = proxy.path || '/offers/v1.0/aws/index.json';
}
//If-Modified-Since: Sat, 05 May 2018 20:38:27 GMT
modified = req.get('If-Modified-Since');
//If-None-Match: "5e5d61fb71903f6b8f0123335154d11b"
match = req.get('If-None-Match');
headers = {};
if (modified) {
headers['If-Modified-Since'] = modified;
}
if (match) {
headers['If-None-Match'] = match;
}
console.log(method + ' ' + path + ' ' + proxy.name + ' ' + req.ips);
reqInner = https.request({
hostname: backend,
port: 443,
path: path,
method: method,
headers: headers,
agent: agent
}, resInner => {
let rawData = '';
resInner.setEncoding('utf8');
resInner.on('data', chunk => { rawData += chunk; });
resInner.on('end', () => {
//https://expressjs.com/en/api.html#res
res.set('Access-Control-Allow-Origin', origin);
res.set('Access-Control-Allow-Methods', "GET, HEAD, OPTIONS");
res.set('Access-Control-Allow-Headers', "Origin, X-Requested-With, Content-Type, Accept");
// CHECKME: what about HEAD or GET 304? We need to expose Content-Length and ETag
//https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Access-Control-Expose-Headers
res.set('Access-Control-Expose-Headers', 'Content-Length, ETag');
//res.status(200).send(`Data: ${rawData}`);
//if (method == 'HEAD') {
// console.log(resInner.headers);
//}
//https://nodejs.org/api/http.html#http_class_http_serverresponse
//console.log(resInner.statusCode + ' ' + resInner.statusMessage);
if (resInner.headers['content-length']) {
res.set('Content-Length', resInner.headers['content-length']);
//console.log('Content-Length: ' + resInner.headers['content-length']);
}
if (resInner.headers['etag']) {
res.set('ETag', resInner.headers['etag']);
//console.log('ETag:' + resInner.headers['etag']);
}
//https://cloud.google.com/functions/docs/writing/http
if (method == 'HEAD') {
res.status(resInner.statusCode).end();
} else {
if (path.endsWith('.csv')) {
// path is /offers/v1.0/aws/<service>/<version>/index.csv
// or /offers/v1.0/aws/<service>/<version>/<region>/index.csv
pieces = path.split('/');
//console.log(path + ' ' + pieces.length + ' ' + pieces);
if (pieces.length > 7) {
res.set('Content-Disposition', 'attachment; filename="' + pieces[4] + '.' + pieces[6] + '.csv"');
} else {
res.set('Content-Disposition', 'attachment; filename="' + pieces[4] + '.csv"');
}
res.set('Content-Type', 'application/octet-stream');
}
res.status(resInner.statusCode).send(rawData);
}
});
});
reqInner.on('error', e => {
res.status(500).send(`Error: ${e.message}`);
});
reqInner.end();
method = req.method || "GET";
path = req.path || "/offers/v1.0/aws/index.json";
// TODO: choose proxy config based on path prefix?
proxy = config[config["default"]];
backend = proxy.backend || "pricing.us-east-1.amazonaws.com";
origin = proxy.origin || "*";
if (path == "/") {
path = proxy.path || "/offers/v1.0/aws/index.json";
}
//If-Modified-Since: Sat, 05 May 2018 20:38:27 GMT
modified = req.get("If-Modified-Since");
//If-None-Match: "5e5d61fb71903f6b8f0123335154d11b"
match = req.get("If-None-Match");
headers = {};
if (modified) {
headers["If-Modified-Since"] = modified;
}
if (match) {
headers["If-None-Match"] = match;
}
console.log(method + " " + path + " " + proxy.name + " " + req.ips);
reqInner = https.request(
{
hostname: backend,
port: 443,
path: path,
method: method,
headers: headers,
agent: agent,
},
(resInner) => {
let rawData = "";
resInner.setEncoding("utf8");
resInner.on("data", (chunk) => {
rawData += chunk;
});
resInner.on("end", () => {
//https://expressjs.com/en/api.html#res
res.set("Access-Control-Allow-Origin", origin);
res.set("Access-Control-Allow-Methods", "GET, HEAD, OPTIONS");
res.set(
"Access-Control-Allow-Headers",
"Origin, X-Requested-With, Content-Type, Accept"
);
// CHECKME: what about HEAD or GET 304? We need to expose Content-Length and ETag
//https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Access-Control-Expose-Headers
res.set("Access-Control-Expose-Headers", "Content-Length, ETag");
//res.status(200).send(`Data: ${rawData}`);
//if (method == 'HEAD') {
// console.log(resInner.headers);
//}
//https://nodejs.org/api/http.html#http_class_http_serverresponse
//console.log(resInner.statusCode + ' ' + resInner.statusMessage);
if (resInner.headers["content-length"]) {
res.set("Content-Length", resInner.headers["content-length"]);
//console.log('Content-Length: ' + resInner.headers['content-length']);
}
if (resInner.headers["etag"]) {
res.set("ETag", resInner.headers["etag"]);
//console.log('ETag:' + resInner.headers['etag']);
}
//https://cloud.google.com/functions/docs/writing/http
if (method == "HEAD") {
res.status(resInner.statusCode).end();
} else {
if (path.endsWith(".csv")) {
// path is /offers/v1.0/aws/<service>/<version>/index.csv
// or /offers/v1.0/aws/<service>/<version>/<region>/index.csv
pieces = path.split("/");
//console.log(path + ' ' + pieces.length + ' ' + pieces);
if (pieces.length > 7) {
res.set(
"Content-Disposition",
'attachment; filename="' + pieces[4] + "." + pieces[6] + '.csv"'
);
} else {
res.set(
"Content-Disposition",
'attachment; filename="' + pieces[4] + '.csv"'
);
}
res.set("Content-Type", "application/octet-stream");
}
res.status(resInner.statusCode).send(rawData);
}
});
}
);
reqInner.on("error", (e) => {
res.status(500).send(`Error: ${e.message}`);
});
reqInner.end();
};

/**
Expand All @@ -105,14 +119,14 @@ var cachedAgent = function cachedAgent(req, res) {
* @param {Object} res Cloud Function response context.
*/
exports.corsAgent = (req, res) => {
//https://mhaligowski.github.io/blog/2017/03/10/cors-in-cloud-functions.html
//https://github.com/firebase/functions-samples/issues/288
//var corsFn = cors();
//corsFn(req, res, function() {
// cachedAgent(req, res);
//});
//cors(req, res, function() {
// cachedAgent(req, res);
//});
cachedAgent(req, res);
//https://mhaligowski.github.io/blog/2017/03/10/cors-in-cloud-functions.html
//https://github.com/firebase/functions-samples/issues/288
//var corsFn = cors();
//corsFn(req, res, function() {
// cachedAgent(req, res);
//});
//cors(req, res, function() {
// cachedAgent(req, res);
//});
cachedAgent(req, res);
};

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