Best practice for writing UIImage data to server

Question

I was thinking along the lines of sending base64 encoded NSData of the UIImage but the image is corrupted. I'm using https://github.com/nicklockwood/Base64 for Base64 encoding.

NSData *data = UIImageJPEGRepresentation(myViewImage,1.0);

NSString *stringSentToServer = [data base64EncodedString];

// POST data to nodeJS
var fs = require('fs');
fs.writeFile("mydirectory/image.png", "data:image/png;base64,"+(POSTED stringSentToServer here), function(err) {    
if(err) console.log(err); else console.log('Success');
});

The filesize saved looks appropriate, but the image is corrupt. What am i doing wrong? Or is there a better way to do this?

** EDIT ** I've tried AFNetworking multipart upload. I'm receiving positive progress callback, but the image is still corrupt on the server.

How do you upload your data to the server? Are you using multipart upload or do you just put stringSentToServer into the body of your POST? — Arthur Shinkevich, Sep 05 '13 at 20:40
I would personally recommend using Multipart upload instead of putting a string directly into the body. A good library to use would be AFNetworking. — Arthur Shinkevich, Sep 05 '13 at 20:53
@Arcanfel I have not tried AFNetworking Multipart upload. I get positive progress callback but the image is still saving corrupted. — GameDevGuru, Sep 06 '13 at 21:26
Is the length of the string the same before and after upload? — Arthur Shinkevich, Sep 06 '13 at 21:42
@Arcanfel I'm using the File Upload With Progress from the doc https://github.com/AFNetworking/AFNetworking, it doesnt specify a post string. — GameDevGuru, Sep 06 '13 at 22:33
What you posted does not show how you used the Base64 class. Can you provide us with more details ? — LudoZik, Sep 05 '13 at 19:08
It is because it takes image data and uploads it using multipart upload method. You need to make sure your server accepts this type of request. — Arthur Shinkevich, Sep 07 '13 at 05:44
@Arcanfel How can i accept AFNetowork multipart upload with NodeJS ? — GameDevGuru, Sep 07 '13 at 14:46
I am not an expert in node.js, but I think this discussion should help you a lot - http://stackoverflow.com/questions/5149545/uploading-images-using-nodejs-express-and-mongo — Arthur Shinkevich, Sep 08 '13 at 00:28
i know its too late but you can try this answer http://stackoverflow.com/questions/20267939/nodejs-write-base64-image-file — Fareed Alnamrouti, Mar 28 '15 at 01:04

Best practice for writing UIImage data to server

0 Answers0