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Improve Stream error handling #88

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This commit is contained in:
Lovell Fuller 2014-09-12 19:30:57 +01:00
parent 34c96ff925
commit 515b4656e6
3 changed files with 46 additions and 11 deletions
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16
README.md
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@ -419,23 +419,25 @@ var counters = sharp.counters(); // { queue: 2, process: 4 }
### It worked on my machine
npm test
```
npm test
```
Running the comparative performance tests requires _ImageMagick_ and _GraphicsMagick_.
```
brew install imagemagick
brew install graphicsmagick
brew install imagemagick
brew install graphicsmagick
```
```
sudo apt-get install -qq imagemagick graphicsmagick
sudo apt-get install -qq imagemagick graphicsmagick
```
```
sudo yum install ImageMagick
sudo yum install -y http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
sudo yum install -y --enablerepo=epel GraphicsMagick
sudo yum install ImageMagick
sudo yum install -y http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
sudo yum install -y --enablerepo=epel GraphicsMagick
```
## Performance

14
index.js
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@ -331,16 +331,22 @@ Sharp.prototype._sharp = function(callback) {
// output=stream, input=stream
this.on('finish', function() {
sharp.resize(that.options, function(err, data) {
if (err) throw err;
that.push(data);
if (err) {
that.emit('error', new Error(err));
} else {
that.push(data);
}
that.push(null);
});
});
} else {
// output=stream, input=file/buffer
sharp.resize(this.options, function(err, data) {
if (err) throw err;
that.push(data);
if (err) {
that.emit('error', new Error(err));
} else {
that.push(data);
}
that.push(null);
});
}

27
tests/unit.js
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@ -417,6 +417,33 @@ async.series([
var pipeline = sharp().resize(320, 240);
readable.pipe(pipeline).pipe(writable);
},
// Stream-Stream error handling
function(done) {
var pipeline = sharp().resize(320, 240);
var anErrorWasEmitted = false;
pipeline.on('error', function(err) {
anErrorWasEmitted = !!err;
}).on('end', function() {
assert(anErrorWasEmitted);
done();
});
var readableButNotAnImage = fs.createReadStream(__filename);
var writable = fs.createWriteStream(outputJpg);
readableButNotAnImage.pipe(pipeline).pipe(writable);
},
// File-Stream error handling
function(done) {
var readableButNotAnImage = sharp(__filename).resize(320, 240);
var anErrorWasEmitted = false;
readableButNotAnImage.on('error', function(err) {
anErrorWasEmitted = !!err;
}).on('end', function() {
assert(anErrorWasEmitted);
done();
});
var writable = fs.createWriteStream(outputJpg);
readableButNotAnImage.pipe(writable);
},
// Crop, gravity=north
function(done) {
sharp(inputJpg).resize(320, 80).crop(sharp.gravity.north).toFile(path.join(fixturesPath, 'output.gravity-north.jpg'), function(err, info) {