send file from sails.js web server to android app

Question

I have an Android app
I also have a web server that has been programmed with Sails.js.
The Android app communicates with this web server.
For example, the Android app sends a request to the server that the server sends back 20 images for the Android app as a response.

Now, my question is, how should I send these images to the Android app?(In Sails.js)

Answer 1

You have two options.

Option 1:

The first request return array of urls, url for each image, and the Android app should use each url to display the image.

For example it can be json response:

{images: [{url: "http://example.com/image1.jpg"}, {url: "http://example.com/image2.jpg"}]}

If the images are static files, you can see here How to serve a static folder in sails.js?

Option 2:

The server can return array of the images themself, each item in the array can be the base64 encoded image data.

So the steps are:

1. Get the base64 encoded images, if you want to take them from file you can see this question: http://stackoverflow.com/questions/24523532/ddg#24526156

2. Put the images into array and send it as the http response

   {images:[{data: "data:image/jpeg;base64,/9j/4AAQSkZJRg...."},{data: "data:image/png;base64,/9j/1414...."}]}
   

3. Display the base64 encoded file in the Android app. I dont have any experience in Android development, but maybe this answer will help you: How to convert a Base64 string into a BitMap image to show it in a ImageView?