Cloud Functions

1npx @edgio/cli@latest init \
2  --edgioVersion latest

1// routes.js
2import {Router} from '@edgio/core';
3
4export default new Router().get('/some-route/:someParam', ({compute}) => {
5  compute((req, res) => {
6    // Here you can access the following information about the request:
7    // ================================================================
8
9    // To get the request path and query string
10    const url = req.url; // e.g /some/path?foo=bar
11
12    // To get the request body as a string
13    const body = req.body;
14
15    // To get the request method:
16    const method = req.method;
17
18    // To get the headers sent from the browser:
19    const headers = req.getHeaders(); // keys are always lower-case
20
21    // To get the value of a specific request header:
22    const someHeader = req.getHeader('some-header'); // the header name is case-insensitive
23
24    // To check if https was used
25    const isHttps = req.secure;
26
27    // To access query parameters
28    const {id, name} = req.query; // for example if the query string is ?id=1&name=Mark
29
30    // To access path parameters:
31    const {someParam} = req.params;
32
33    // To specify the response:
34    // ================================================================
35
36    // To set a response header:
37    res.setHeader('content-type', 'application/json');
38
39    // To set the response body, use:
40    res.body = 'some string';
41
42    // To set the response status:
43    res.statusCode = 200;
44    res.statusMessage = 'OK';
45  });
46});

1// edgio.config.js
2module.exports = {
3  // ... other config options
4
5  origins: [
6    {
7      // The name of the backend origin
8      name: 'origin',
9
10      // Uncomment the following to override the host header sent from the browser when connecting to the origin
11      // override_host_header: 'example.com',
12
13      // The list of origin hosts to which to connect
14      hosts: [
15        {
16          // The domain name or IP address of the origin server
17          location: 'example.com',
18        },
19      ],
20
21      // Uncomment the following to configure a shield
22      // shields: { us_east: 'DCD' },
23    },
24  ],
25};

1// routes.js
2import {Router} from '@edgio/core';
3
4export default new Router().get('/some-route/:someParam', ({proxy}) => {
5  proxy('origin', {
6    transformRequest: (req) => {
7      // You can optionally transform the request before it is sent to the origin
8      // Here you can modify the following information about the request:
9      // ================================================================
10
11      // To alter the request URL:
12      req.url = '/some/path?foo=bar';
13
14      // To alter the request body:
15      req.body = JSON.stringify({foo: 'bar'});
16
17      // To alter the request method:
18      req.method = 'POST';
19
20      // To get the headers sent from the browser:
21      const headers = req.getHeaders();
22
23      // To get the value of an incoming request header:
24      const someHeader = req.getHeader('some-header'); // the header name is case-insensitive
25
26      // To set a request header:
27      req.setHeader('content-type', 'application/json'); // the header name is case-insensitive
28
29      // To remove a request header:
30      req.removeHeader('some-header'); // the header name is case-insensitive
31
32      // To access query parameters
33      const {id, name} = req.query; // for example if the query string is ?id=1&name=Mark
34
35      // To access path parameters:
36      const {someParam} = req.params;
37    },
38    transformResponse: (res, req) => {
39      // To access or modify the body, use:
40      res.body = 'some string';
41
42      // To set a header:
43      res.setHeader('content-type', 'application/json'); // the header name is case-insensitive
44
45      // To remove a header:
46      res.removeHeader('some-header'); // the header name is case-insensitive
47
48      // To get the headers returned from the origin. Keys are always lower case
49      const headers = res.getHeaders();
50
51      // To get a specific header returned from the origin:
52      const cookie = res.getHeader('cookie'); // the header name is case-insensitive
53    },
54  });
55});

1// routes.js
2import {Router} from '@edgio/core';
3
4export default new Router().get('/', ({cache, compute}) => {
5  cache({
6    edge: {
7      maxAgeSeconds: 60 * 60, // cache for one hour at the edge
8      staleWhileRevalidateSeconds: 60 * 60 * 24, // and continue to serve stale responses for up to 24 hours while fetching a fresh response
9    },
10  });
11  compute((req, res) => {
12    res.setHeader('content-type', 'application/json');
13    res.body = JSON.stringify({message: 'Hello World!'});
14  });
15});

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