write not writing

[lakamsani]

Hi, somehow this very simple test isn't working in my environment (jimp 0.2.27, node.js 7.9.0 on macOS Sierra 10.12.4 ). newFile2 does not exist nor an error is printed after this code is run.

var Jimp = require("jimp");
Jimp.read('https://graph.facebook.com/10207748578225773/picture?type=large').then(function (lenna) {
  //let newFile = "/tmp/lena-small-bw" + lenna.getExtension()
  let newFile2 = "/tmp/lena-small-bw"
  lenna.resize(256, 256)            // resize
    .quality(60)                 // set JPEG quality
    .greyscale()                 // set greyscale
    .write(newFile2); // save
}).catch(function (err) {
  console.error(err);
});

The commented out line fails as it is unable to get the extension ( same issue as reported in #241).

Debugger seems to show that the URL was read ok.

Tried with a local file Jimp.read('/Users/vamsee/Pictures/vamsee.jpg').then(function (lenna) { and same problem.

[lakamsani]

When I use https://www.npmjs.com/package/node-thumbnail (which is built on top of Jimp) saving works. But node-thumbnail does not allow URLs. I hacked it to work with URLs while I try to analyze why it works via that that library but not via the above simple direct Jimp code.

[thewizarodofoz]

the write method accepts Node-style callback. If you pass the callback you could log the error:
.write(newFile2, err => console.error('write error: ', err));

When I ran your code the error I got was permissions error (because I didn't have a tmp folder - do you have that folder?).

[lakamsani]

@thewizarodofoz thanks for checking out this issue as well. Adding that node style callback to write gave more info.

write error:  Error: Unsupported MIME type: application/octet-stream
    at Jimp.throwError (/Users/vamsee/Development/OnKore/onkore-node/node_modules/jimp/index.js:82:43)
    at Jimp.<anonymous> (/Users/vamsee/Development/OnKore/onkore-node/node_modules/jimp/index.js:2309:36)
    at Jimp.getBuffer (/Users/vamsee/Development/OnKore/onkore-node/node_modules/jimp/index.js:2037:23)
    at Jimp.write (/Users/vamsee/Development/OnKore/onkore-node/node_modules/jimp/index.js:2308:10)

the image does load via browser.

[lakamsani]

The problem in this case was the lack of a file suffix. It works with this change let newFile2 = "/tmp/lena-small-bw.png"