Node.js Base64 Image decoding and writing to file

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I'm sending the contents of this Flex form (Don't ask why) over to node. There is a post paramteter called "photo" which is a base64 encoded image.

Contents of photo get sent over ok. Problem is when I am trying to decode the content and write them to a file.

  var fs = require("fs");

  fs.writeFile("arghhhh.jpg", new Buffer(request.body.photo, "base64").toString(), function(err) {});

I've tried toString("binary") as well. But it seems node doesnt decode all of the content. It seems it only decodes jpg header info and leaves the rest.

Can anyone please help me with this?

Thanks

Try removing the .toString() entirely and just write the buffer directly.

Node.js Base64 Image decoding and writing to file, Hi everyone,. I'm sending the contents of this Flex form (Don't ask why) over to node. There is a post paramteter called "photo" which is a base64 encoded image  Online tool for generating HTML entities and converting HTML entities to text. Sep 29, 2019; Using Node.js to download files. How to download files using Node.js There are three approaches to writing a file downloader using Node: Using HTTP.get Using curl Using wget I have created functions for all of them. To get the examp Nov 01, 2011

this is my full solution which would read any base64 image format, decode it and save it in the proper format in the database:

    // Save base64 image to disk
    try
    {
        // Decoding base-64 image
        // Source: http://stackoverflow.com/questions/20267939/nodejs-write-base64-image-file
        function decodeBase64Image(dataString) 
        {
          var matches = dataString.match(/^data:([A-Za-z-+\/]+);base64,(.+)$/);
          var response = {};

          if (matches.length !== 3) 
          {
            return new Error('Invalid input string');
          }

          response.type = matches[1];
          response.data = new Buffer(matches[2], 'base64');

          return response;
        }

        // Regular expression for image type:
        // This regular image extracts the "jpeg" from "image/jpeg"
        var imageTypeRegularExpression      = /\/(.*?)$/;      

        // Generate random string
        var crypto                          = require('crypto');
        var seed                            = crypto.randomBytes(20);
        var uniqueSHA1String                = crypto
                                               .createHash('sha1')
                                                .update(seed)
                                                 .digest('hex');

        var base64Data = 'data:image/jpeg;base64,/9j/4AAQSkZJRgABAQEAZABkAAD/4Q3zaHR0cDovL25zLmFkb2JlLmN...';

        var imageBuffer                      = decodeBase64Image(base64Data);
        var userUploadedFeedMessagesLocation = '../img/upload/feed/';

        var uniqueRandomImageName            = 'image-' + uniqueSHA1String;
        // This variable is actually an array which has 5 values,
        // The [1] value is the real image extension
        var imageTypeDetected                = imageBuffer
                                                .type
                                                 .match(imageTypeRegularExpression);

        var userUploadedImagePath            = userUploadedFeedMessagesLocation + 
                                               uniqueRandomImageName +
                                               '.' + 
                                               imageTypeDetected[1];

        // Save decoded binary image to disk
        try
        {
        require('fs').writeFile(userUploadedImagePath, imageBuffer.data,  
                                function() 
                                {
                                  console.log('DEBUG - feed:message: Saved to disk image attached by user:', userUploadedImagePath);
                                });
        }
        catch(error)
        {
            console.log('ERROR:', error);
        }

    }
    catch(error)
    {
        console.log('ERROR:', error);
    }

Convert a base64 string to a file in Node, it back to an image, we need to: Strip off the data:image/png;base64, part; Write the remaining string to a file using a base64 encoding. nodejs - Node.js Base64 Image decoding and writing to file nodejs - Node.js Base64 Image decoding and writing to file nodejs base64 decode to buffer (3) In nodejs 8.11.3 new Buffer(string, encoding) is deprecated, instead of this the new way to do that is Buffer.from(string, encoding) always without.toString().

In nodejs 8.11.3 new Buffer(string, encoding) is deprecated, instead of this the new way to do that is Buffer.from(string, encoding) always without .toString(). For more details read the documentation in nodejs docs: Buffer

Encoding and Decoding Base64 Strings in Node.js, NodeJS write base64 image-file. My NodeJS-Server receives a picture base64 encoded. data:image/jpeg;base64,/9j/4QCcRXhpZgAASUkqAAgAAAA CiiigD//​Z writeFile with encoding option base64 after stripping out the meta information​. NodeJS write base64 image-file . Posted by: admin November 9, Is this possible? I have not found a plugin for Node.js which will do this for Windows. Are there

Remove .toString()

Here you decode the base64 to a buffer, which is fine, but then you convert the buffer into a string. This means that it is a string object whose code points are bytes of the buffer.

NodeJS write base64 image-file, base64 image to disk try { // Decoding base-64 image // Source: http://​stackoverflow.com/questions/20267939/nodejs-write-base64-image-file  To find out what, start with console.log(typeof policyObj.image) to see if it is a string. Next, try console.log(policyObj.image). Look at the output if it starts with data:image/xxx;base64, where xxx is the image format. It's not uncommon that data-urls like this get misformatted in the header or additional citation marks, and it's possible to

Node.js Base64 Image decoding and writing to file, js file. Paste the code below into Jakefile.js . Run the command jake base64:​encode[./path/to/  There might be scenarios where you need to convert an base64 string back to a file. This article will show you how. The high level view. As an example, a base64 string representation of a png image looks like:

NodeJS: Create a Base64 image from a PNG or JPG, API .base64(filename, callback). Convert image file to image base64 data. {string​} filename required. The image path; {function} callback(err,  NodeJS base64 image encoding/decoding not quite working. Browse other questions tagged node.js base64 or ask your own question. NodeJS write base64 image-file. 8.

base64-img, How to Base64 encode and decode in Node.js Here is how you encodetext string, and re-generate a copy of the image from the base64 encoded string. var bitmap = new Buffer(base64str, 'base64'); // write buffer to file fs. You can decode any Base64 encoded data using the built-in Buffer API provided by Node.js. . Buffer objects are similar to arrays of integers from 0 to 255.Moreover, Buffer objects are immutable.

Comments
  • What is photo here ?? is that base64 image???
  • boy do I feel super stupid. Nathan, you are a hero. Thank you.
  • My pleasure - glad I could help :D
  • This was the response i was searching for, thanks m8