我是node.js的新手，我正在尝试使用GraphicsMagic。我已经在我的windows pc中安装了GraphicsMagic，并且还安装了npm install的gm模块。我能够获得完整的图像，但无法使用以下代码创建拇指。任何人都可以帮助我朝正确的方向前进吗？
var express = require('express');
var app = express();
var fs = require('fs');
var gm = require('gm');
app.configure(function () {
app.use(express.logger('dev'));
app.use(express.bodyParser());
app.use(express.methodOverride());
});
app.listen(8080);
console.log("App listening on port 8080");
app.post('/upload', function (req, res) {
fs.readFile(req.files.image.path, function (err, data) {
var imageName = req.files.image.name;
if (!imageName) {
console.log("There was an error");
res.redirect("/");
res.end();
} else {
var newPath = __dirname + "/uploads/fullsize/" + imageName;
var thumbPath = __dirname + "/uploads/thumbs/" + imageName;
fs.writeFile(newPath, data, function (err) {
gm(newPath)
.resize(240, 240)
.noProfile()
.write(thumbPath, function (err) {
if (!err) console.log('done');
res.redirect("/uploads/thumbs/"+imageName);
});
});
}
});
});
app.get('/uploads/thumbs/:file', function (req, res) {
file = req.params.file;
var img = fs.readFileSync(__dirname + "/uploads/thumbs/" + file);
res.writeHead(200, {'Content-Type': 'image/jpg' });
res.end(img, 'binary');
});
app.get('*', function (req, res) {
res.sendfile('./views/index.html'); // load the single view file (angular will handle the page changes on the front-end)
});
的index.html：
<!doctype html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
</head>
<body>
<form method="POST" action="/upload" enctype="multipart/form-data">
<input type="file" name="image" />
<input type="submit" name="submit" value="Submit"/>
</form>
</body>
</html>