const filePath = "temp-file-to-upload" // Local file path
cos.putObject({
   Bucket: 'examplebucket-1250000000',
   Region: 'COS_REGION',
   Key: 'exampleobject',
   Body: fs.createReadStream(filePath), // Uploaded file object
   onProgress: function(progressData) {
       console.log(JSON.stringify(progressData));
   },
   Headers: {
       // Use the `imageMogr2` API to scale the image (by specifying the width of the output image to 200, with the height scaled proportionally).
       'Pic-Operations': '{"is_pic_info": 1, "rules": [{"fileid": "desample_photo.jpg", "rule": "imageMogr2/thumbnail/200x/"}]}'
  },
}, function(err, data) {
   console.log(err || data);
});

cos.request({
    Bucket: config.Bucket,
    Region: config.Region,
    Key: 'exampleobject',
    Method: 'POST',
    Action: 'image_process',
    Headers: {
       // Use the `imageMogr2` API to scale the image (by specifying the width of the output image to 200, with the height scaled proportionally).
      'Pic-Operations': '{"is_pic_info": 1, "rules": [{"fileid": "desample_photo.jpg", "rule": "imageMogr2/thumbnail/200x/"}]}'
    },
}, function (err, data) {
   console.log(err || data);
});

cos.getObject({
    Bucket: 'examplebucket-1250000000',
    Region: 'COS_REGION',
    Key: 'exampleobject',
    QueryString: `imageMogr2/thumbnail/200x/`,
}, function (err, data) {
   console.log(err || data);
   fs.writeFileSync('filepath', data.Body);  // Save the image locally
});

// Generate a signed URL (valid for 30 minutes) with image processing parameters.
var url1 = cos.getObjectUrl({
    Bucket: 'examplebucket-1250000000',
    Region: 'COS_REGION',
    Key: 'exampleobject',
    Query: {
      `imageMogr2/thumbnail/200x/`: ''
    },
    Expires: 1800,
    Sign: true,
}, function (err, data) {
    if(data){
        console.log(data.Url);
    }
});

// Generate an unsigned URL with image processing parameters.
var url2 = cos.getObjectUrl({
    Bucket: 'examplebucket-1250000000',
    Region: 'COS_REGION',
    Key: 'exampleobject',
    Query: {
      `imageMogr2/thumbnail/200x/`: ''
    },
    Sign: false,
}, function (err, data) {
    if(data){
        console.log(data.Url);
    }
});