Send responses in data streams
arguments
- @params {function} func - function that returns data on event 'data'; ends with event 'end' and generates errors with event 'error'
- @params {string} delimiter - string that is sent to indicate distinct data chuncks ie data1-delimiter-data2-... It should be a string that is unlikely to occur in the data chuncks and should not include repeating patterns
- @params {object} res - express response object
example
app.get('/path', (req, res)=>{
const streamFunction = ()=>{ / function that sends data on events}
const delimiter = '#$%&*()-+=!@~';
sendStream(streamFunction, delimiter, res)
.then(()=> / end processing /)
.catch((err)=> / eror processing /)
})Set cache control headers when CDN is in use
arguments
- @params {object} res - Express response object
- @params {int} age - Maximum caching time (in seconds)
- @params {string} cacheType - Type of caching allowed (default "private")
- @params {string} storeType - Type of storage allowd (default "no-store")
example
app.get('/path', (req, res)=>{
setCDNHeaders(res, 7200, 'public', '');
res.send({response: 'ok'}); // the response to this request will be cached by the CDN and browsers for 2 hours
})