Calling an API that generates Avatar returns 4 array of bytes

Question

I'm calling a third party API that generates an Avatar like this:

https.get(url, (response) => {
        var buffer = "";
        response.on('data', (data) => {
            logger.debug(JSON.stringify(data));
            buffer += data;
        });
         
        response.on('end', () => {
            logger.debug(buffer.toString('base64'));
            res.status(200).json({src:buffer});
        });
        
        response.on('error', (error) => {
            console.log(chalk.red.bgWhite('error' + error));
        });
    })

from the log it seems response.on('data', (data) => { is being called several times each time data is a different array of numbers which I don't know how to convert into an image I've tried prefix the data with data:image/png;base64, it didn't work. **when copy paste the url in the browser the avatar image (png) is shown [![enter image description here][1]][1]

these are the arrays of bytes in response.on('data', (data) =>{... getting in response

{"type":"Buffer","data":[137,80,78,71,13,10,26,10,0,0,0,13,73,72,68,82,0,0,0,40,0,0,0,40,8,2,0,0,0,3,156,47,58,0,0,13,127,73,68,65,84,120,156,117,88,75,143,35,215,117,62,247,85,85,100,85,177,88,69,178,155,77,246,115,30,221,211,51,154,135,156,201,96,12,43,26,9,50,236,69,226,24,8,18,239,13,36,72,182,1,2,36,217,24,200,42,191,33,27,3,241,214,136,148,4,200,38,146,99,193,145,133,81,102,164,233,121,118,207,171,123,154,108,118,147,108,178,248,170,119,213,189,55,139,106,141,58,35,167,86,119,115,238,119,206,119,94,223,45,116,118,101,21,0,16,66,66,136,52,77,41,165,130,115,132,49,165,84,74,9,0,82,202,183,174,94,41,20,139,135,157,142,235,186,81,16,102,73,74,25,21,66,0,66,148,49,199,113,84,77,69,8,101,89,22,6,225,100,60,206,178,140,98,140,48,22,66,100,89,214,88,108,114,206,221,193,16,0,16,2,41,1,0,104,142,154,101,153,166,169,155,151,46,57,21,199,247,253,189,23,47,221,161,203,20,37,142,162,229,181,149,155,223,189,121,247,238,151,166,105,110,92,184,48,28,14,15,59,157,126,183,167,155,102,181,86,45,149,74,156,243,56,142,45,203,42,22,139,148,177,217,116,218,106,183,221,227,65,150,166,152,144,239,255,240,7,89,150,29,117,187,190,231,135,65,32,5,194,4,33,4,20,0,56,231,186,110,188,253,157,27,118,213,116,156,10,198,120,101,117,237,206,23,183,143,14,15,152,134,13,211,104,183,15,60,207,51,12,195,178,172,229,229,101,187,92,166,140,217,229,242,220,220,28,33,164,215,239,147,44,179,109,187,84,42,205,215,235,148,82,243,209,163,227,227,254,65,251,224,189,247]}
{"type":"Buffer","data":[222,59,123,238,220,135,31,126,184,186,182,234,79,125,14,254,143,254,190,249,235,127,26,12,246,18,156,135,219,92,90,92,255,209,76,212,95,200,140,170,154,82,50,75,215,174,95,125,251,143,170,171,215,245,48,140,218,173,182,239,251,138,162,104,154,150,36,73,150,101,122,177,88,95,88,40,219,118,20,69,134,174,75,41,9,33,211,233,116,111,111,47,138,34,130,177,170,168,235,235,235,37,203,250,242,238,93,0,160,132,216,182,131,21,88,186,82,80,13,44,133,164,8,131,76,168,126,190,91,92,96,229,237,107,137,152,37,99,84,46,57,116,170,106,170,42,184,87,212,12,85,83,21,198,48,198,71,71,71,135,135,135,24,99,93,215,9,198,23,55,55,159,98,60,153,78,103,158,231,186,174,162,40,161,235,38,73,18,71,145,231,121,154,166,237,108,111,11,41,29,199,25,186,110,24,69,4,211,56,224,82,0,0,96,0,64,24,69,65,50,189,183,92,36,21,66,200,171,253,221,169,231,34,12,156,103,133,18,57,187,190,102,151,237,28,117,56,28,34,132,0,192,48,140,48,12,251,253,254,91,111,189,5,0,5,77,27,141,70,179,217,140,16,34,56,143,162,136,82,26,199,113,154,166,245,249,249,27,55,110,172,172,172,48,69,97,170,2,32,1,0,0,176,20,64,85,209,185,75,227,190,181,127,248,92,47,152,181,90,117,183,245,44,20,3,197,228,106,129,248,190,151,102,169,4,112,93,247,217,179,103,227,241,120,99,99,35,138,99,166,40,123,123,123,183,111,223,70,0,65,16,40,138,82,178,172,203,151,47,191,123,235,214,213,107,215,44,203,74,211,52,138,162,48,12,59,7,7,179,233,172,226,56,138,170,2,146,132,32,144,64,1,161,140,243,230,226,146,105,152,59,79,118,146,56,62,123,254,44,70,108,183,253,104,252,124,58,233,162,186,221,43,232,170,235,186,213,74,101,161,209,232,116,58,24,33,85,85,15,218,109,203,178,178,44,195,132,4,65,96,154,38,163,84,72,185,191,191,31,134,97,81,215,147,52,149,0,199,131,193,81,183,11,8,144,36,2,178,216,147,193,152,99,138,40,72,137,16,170,205,213,52,77,187,114,245,202,206,206,206,97,231,200,208,141,23,247,15,189,105,66,21,84,160,163,241,20,40,33,142,227,212,235,245,87,175,94,61,126,252,184,94,175,151,203,229,70,163,145,166,105,183,219,197,24,251,65,128,9,9,182,183,131,32,40,22,139,211,233,84,211,180,249,249,249,205,205,205,131,131,131,157,167,219,105,136,137,138,63,251,197,224,120,47,81,13,68,133,16,170,170,58,78,229,233,206,211,106,173,250,246,219,111,199,73,188,243,100,123,230,77,168,74,9,163,197,162,30,69,145,239,121,47,119,119,251,253,126,183,219,45,151,203,92,8,219,182,11,133,66,154,101,113,146,140,39,147,52,77,61,207,139,227,24,99,12,18,152,194,24,99,195,225,112,103,103,199,15,124,224,216,92,136,17,53,188,163,136,176,16,36,80,33,132,89,50,21,85,57,56,104,247,122,189,70,179,209,104,52,14,90,237,107,87,222,50,75,230,253,7,143,211,52,93,93,93,77,146,228,209,163,71,245,122,253,226,197,139,148,82,4,136,16,210,106,183,57,231,142,227,204,205,205,97,140,41,165,170,170,154,166,217,239,247,41,161,205,197,102,28,199,66,8,66,176,76,105,88,124,226,249,99,106,173,162,120,107,239,85,155,74,41,21,69,45,22,139,235,27,27,156,115,198,104,175,215,99,4,125,239,214,173,78,187,85,208,212,119,111,221,154,159,155,219,223,223,127,240,224,193,98,179,89,178,44,211,52,117,93,231,156,3,0,198,88,74,41,165,164,148,34,140,121,150,113,158,53,26,141,225,112,8,0,140,49,198,24,38,88,74,148,14,151,247,182,95,108,158,89,91,94,90,222,219,107,81,41,37,83,152,170,105,135,135,135,190,231,151,237,114,235,213,126,177,80,32,140,21,138,250,185,243,231,166,227,137,170,40,174,235,154,166,217,235,245,134,195,225,220,252,252,242,242,114,154,166,8,33,41,37,161,148,16,210,61,58,138,163,168,104,24,134,105,18,66,108,219,230,156,99,140,135,131,193,196,29,234,102,169,58,55,55,95,90,183,237,250,104,48,37,185,191,140,50,41,196,194,66,29,33,52,153,76,6,131,65,146,166,105,154,86,230,230,155,43,171,157,78,231,222,151,95,49,198,28,199,225,156,43,170,154,166,41,99,44,71,101,76,113,143,251,31,127,244,75,191,223,41,171,184,0,73,28,6,8,33,198,24,198,56,73,18,71,103,183,222,249,125,3,165,207,182,239,41,150,130,16,78,147,88,72,73,65,74,66,73,183,219,245,102,179,229,149,229,44,77,31,110,221,143,252,89,28,134,106,161,232,56,78,165,82,233,28,28,20,138,69,203,178,22,22,22,52,77,123,241,252,197,158,186,183,176,176,64,8,81,84,181,245,242,229,159,254,228,199,127,245,215,127,11,16,2,160,127,251,232,63,238,222,219,46,22,84,0,224,92,252,241,79,126,188,121,249,122,22,13,254,226,167,127,78,176,13,82,28,31,31,75,41,49,32,148,165,153,148,114,60,30,183,91,173,32,8,146,36,73,146,244,184,123,132,49,17,66,80,74,139,122,177,213,106,249,190,239,56,14,0,36,105,210,122,181,191,179,189,211,61,58,74,146,184,84,46,127,247,15,222,145,50,12,61,15,0,175,172,46,129,148,0,8,0,1,64,251,224,48,139,142,169,102,204,213,234,182,94,241,103,19,63,136,48,198,20,99,236,123,94,165,90,41,20,10,73,28,123,158,23,6,193,230,230,70,18,69,163,65,191,92,173,129,148,253,222,113,146,36,158,231,221,191,127,191,86,171,169,170,154,196,73,24,134,47,95,184,152,80,69,85,59,7,157,171,215,223,233,29,189,232,245,30,45,173,173,33,4,82,74,4,32,132,224,128,255,245,151,31,169,5,163,82,117,58,199,147,178,93,49,74,22]}
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and then in response.on('end', () =>{ this is what buffer looks like:

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My end goal is to save the base64 string to my DB and then return it to the client to be assigned to <img src=/>

Please help [1]: https://i.stack.imgur.com/F64BA.png

Answer 1

data is a buffer. so you shouldnt json stringify it. Just concat all to obtain an image in binary format. or pipe all to a file.

response.on('data', (data) => {
    // data is a buffer
});

here is a full exemple : Getting binary content in node.js with http.request