Eilles/latex2image-web
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Check to ensure image format conversion was successful

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This commit is contained in:
Joseph Rautenbach 2019-05-23 11:46:43 +02:00
parent 0cce3abc24
commit 05d3f49621
1 changed files with 15 additions and 10 deletions
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25
app.js
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@ -109,16 +109,21 @@ app.post('/convert', function (req, res) {
finalSvgToImageCMD += ' "svg {background: white}"';
}
shell.exec(finalSvgToImageCMD);
// Compress the resultant image
var finalImageMinCMD = imageMinCMD.replace('IN_FILE_NAME', `${tempDirRoot}${id}/equation.${fileFormat}`);
finalImageMinCMD = finalImageMinCMD.replace('OUT_FILE_NAME', `${tempDirRoot}${id}/equation_compressed.${fileFormat}`);
shell.exec(finalImageMinCMD);
// Final image
shell.cp(`${tempDirRoot}${id}/equation_compressed.${fileFormat}`, `${outputDir}img-${id}.${fileFormat}`);
result.imageURL = `${httpOutputURL}img-${id}.${fileFormat}`;
// Ensure conversion was successful; eg. fails if `svgexport` or `imagemin` is not installed
if (fs.existsSync(`${tempDirRoot}${id}/equation.${fileFormat}`)) {
// Compress the resultant image
var finalImageMinCMD = imageMinCMD.replace('IN_FILE_NAME', `${tempDirRoot}${id}/equation.${fileFormat}`);
finalImageMinCMD = finalImageMinCMD.replace('OUT_FILE_NAME', `${tempDirRoot}${id}/equation_compressed.${fileFormat}`);
shell.exec(finalImageMinCMD);
// Final image
shell.cp(`${tempDirRoot}${id}/equation_compressed.${fileFormat}`, `${outputDir}img-${id}.${fileFormat}`);
result.imageURL = `${httpOutputURL}img-${id}.${fileFormat}`;
} else {
result.error = `Error converting SVG file to ${fileFormat.toUpperCase()} image.`;
}
}
} else {
result.error = 'Error converting LaTeX to image. Please ensure the input is valid.';