我正在使用JIMP将我的图像转换为灰度,并在2%的情况下减少它的签名,因为它损坏了我的图像,并在控制台中抛出错误- " error : Invalid file quality.But at Parser._parseSignature JIMP \lib\parser.js:50:18)“,如果出现问题的代码:
var ext=path.extname(dest);
if(ext!='.jpg'){
dest=replaceExt(dest, '.jpg');
}
console.log(path.extname(dest));
var file = fs.createWriteStream(dest);
////console.log(url)
if(url.indexOf('https')!=-1){
//console.log("https")
var request = https.get(url, function(response) {
response.pipe(file);
file.on('finish', function() {
Jimp.read(dest).then(function (lennaa) {
lennaa.resize(256, 256) // resize
.quality(90) // set JPEG quality
.greyscale() // set greyscale
.write(dest); // save
}).catch(function (err) {
console.error(err);
});
file.close(cb); // close() is async, call cb after close completes.
});
}).on('error', function(err) { // Handle errors
fs.unlink(dest); // Delete the file async. (But we don't check the result)
if (cb) cb(err.message);
});
}发布于 2017-10-18 19:20:19
我也遇到了同样的问题,尽管我们尽了最大的努力,但问题似乎是前一个文件仍然没有完成编写。
所以我以一种愚蠢的、可耻的方式做了这件事,并增加了半秒的延迟,以防读取失败。
let image;
try {
image = await Jimp.read(filepath);
} catch (error) {
debug(`Error reading ${filepath}. But we'll try again!`);
// Wait half second, try again. What an ugly hack. It might as well work.
let temp = await new Promise(resolve => setTimeout(resolve, 600));
try {
image = await Jimp.read(filepath);
debug('Success reading file on second attempt!');
} catch (error2) {
// If totally failed, at least exit gracefully:
this.session.send('The bot is a little busy now. Please try again.');
this.session.endDialog();
}
}https://stackoverflow.com/questions/46404120
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