Hi, I have a problem. When I overwrite an existing blob I can not clear the cache so I show the previous blob version. This brings a bad experience for the user.
The quickest way to display the new blob (But it is not instant either) is through the link myaccount-secondary.blob.core.windows.net/mycontainer/miblob (The access keys for your storage account are the same for both the primary and secondary endpoints.)
Because I do not like this solution... Then, try removing the blob previously but continue to cache the old blob. I need something to wipe the cache when uploading from the backend node.
here is my node code
var express = require('express')
var app = express()
var busboy = require('connect-busboy')
var azure = require('azure-storage')
var nconf = require('nconf');
nconf.env().file({ file: 'config.json', search: true });
var tableName = nconf.get("TABLE_NAME");
var partitionKey = nconf.get("PARTITION_KEY");
var accountName = nconf.get("STORAGE_NAME");
var accountKey = nconf.get("STORAGE_KEY");
app.use(function (req, res, next) {
res.setHeader('Access-Control-Allow-Origin', 'http://localhost:3000');
res.setHeader('Access-Control-Allow-Methods', 'POST');
res.setHeader('Access-Control-Allow-Headers', 'X-Requested-With,content-type');
res.setHeader('Access-Control-Allow-Credentials', true);
//res.setHeader("Cache-Control", "public, max-age=01");
var _send = res.send;
var sent = false;
res.send = function(data){
if(sent) return;
_send.bind(res)(data);
sent = true;
};
next();
});
app.use(busboy())
app.use(express.static('public'))
app.get('/', function(req, res) {
res.sendFile('index.html')
})
app.post('/upload', function(req, res, params) {
req.pipe(req.busboy);
var name;
req.busboy.on('field', function (fieldname, val) {
name = val+'.jpg';
});
req.busboy.on('file', function(fieldname, file, filename) {
var blobSvc = azure.createBlobService(accountName, accountKey);
file.pipe(blobSvc.createWriteStreamToBlockBlob('images', name, function(error) {
if (!error) {
res.send(200, 'upload succeeded')
} else {
res.send(500, JSON.stringify(error))
}
}))
})
})
app.listen(process.env.PORT || 3201, function() {
console.log('Example app listening on port 3000!')
})
