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Add Base64 Image support for the .addImage() method #442

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Merged
merged 2 commits into from
Dec 6, 2017
Merged

Add Base64 Image support for the .addImage() method #442

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df8e498
Add Base64 Image support for .addImage() method
jwmann Nov 27, 2017
2fad346
Add new base64 addImage option to the README
jwmann Nov 27, 2017
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7 changes: 7 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -1130,6 +1130,13 @@ var imageId2 = workbook.addImage({
buffer: fs.readFileSync('path/to.image.png'),
extension: 'png',
});

// add image to workbook by base64
var myBase64Image = "data:image/png;base64,iVBORw0KG...";
var imageId2 = workbook.addImage({
base64: myBase64Image,
extension: 'png',
});
```

### Add image background to worksheet
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6 changes: 5 additions & 1 deletion lib/utils/zip-stream.js
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Expand Up @@ -100,7 +100,11 @@ var ZipWriter = function() {
utils.inherits(ZipWriter, events.EventEmitter, {

append: function(data, options) {
this.zip.file(options.name, data);
if (options.hasOwnProperty('base64') && options.base64) {
this.zip.file(options.name, data, { base64: true });
} else {
this.zip.file(options.name, data);
}
},
finalize: function() {
var options = {
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8 changes: 8 additions & 0 deletions lib/xlsx/xlsx.js
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Expand Up @@ -401,6 +401,14 @@ XLSX.prototype = {
resolve();
});
}
if (medium.base64) {
return new PromishLib.Promish(function(resolve) {
var dataimg64 = medium.base64;
var content = dataimg64.substring(dataimg64.indexOf(',') + 1);
zip.append(content, { name: filename, base64: true });
resolve();
});
}
}
return PromishLib.Promish.reject(new Error('Unsupported media'));
}));
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