In today's post I'll expand on this a bit and show how you can check the size of the image. First and foremost - what do we mean by size? Do we mean file size or image dimensions? It has always been easy to check the size of an upload files. Consider this check:. So as you can see, that is easy enough. But we also want to check the size of the image. For our sample application, we will only allow images up to pixels high or wide. A complete example is included below. Tomorrow I'll follow this up with a simple size check.
Include a name or walk the plank! If you like this content, please consider supporting me. You can become a Patron , visit my Amazon wishlist , or buy me a coffee! Any support helps! I have a couple of dozen sites at CrystalTech, which has been reasonably good about quick-but-not-too-quick adaptation of CF upgrades and I hope to see CF8 on the shareds there not too long after it is released So not only determine if it is an image, but if it is within a user settable range of image types?
The file types that CF can wrk on is partially dependent on your system. The imageInfo function does NOT seem to return it. You can check extensions, but that may lie. The file extension not matching the file type is where I was one direction I was trying to go with my question. You can find the CFFiddle demo of this function and other file functions as part of a project that is shared with you. The filename, path, parent directory, type, size, when the file was most recently modified, whether the file has read permission, write permission, and is hidden.
Legal Notices Online Privacy Policy. GetFileInfo Search. Requests taking longer are removed. This will allow you to set a reasonable timeout globally and ignore it when necessary. According to Nielsen , after 8 seconds a website user is likely to click again or leave.
The default setting of 60 seconds is therefore very high and serves as a starting point for your tuning effort. The best practice to right-size this setting is to enable Log Slow Pages in the debugging and logging section. Refactor these pages and test. This setting can be useful if we want to allow developers to override some of the global settings declared in the ColdFusion Administrator.
This is useful for installations where more than one site is bound to an instance of ColdFusion. This setting is enabled by default. It enforces a highly unique identifier per user with a significantly greater complexity than the standard numeric values for the client and session cftoken. The default is checked. These are covered in more details in the Client Variables section of this guide.
Tip: Be sure to review our ColdFusion security recommendations to help secure your server. Having ColdFusion return known HTTP error status codes is helpful to search engines, proxies, and other automated systems that interact with your application.
Similarly, when an error is thrown in ColdFusion, a status code of will be returned. We recommend this setting be enabled in your production environment only.
This setting reduces the file size of the pages that ColdFusion returns to the browser by removing many of the extra spaces, tabs, and carriage returns that ColdFusion might otherwise persist from the CFML source file. This results in a smaller payload delivered to the browser for each page.
If you are experiencing issues with broken JavaScript or CSS, it may be worth disabling this setting. Make sure your settings across your development, staging, and production environments are consistent so issues are not discovered in production.
When arguments are passed to a component method or user-defined function, ColdFusion will perform a validation to ensure that values of the right type are passed.
If you pass an array as an argument that expects a string, ColdFusion will throw an error. Validation like this is helpful during development, but it comes at a slight performance cost. You may realize a performance benefit in production by disabling CFC Type Checking, however, it is typically negligible. The default is unchecked. This setting restricts access to Java objects that provide core services for ColdFusion. As these can change with different versions of ColdFusion we recommend this setting be enabled checked.
This prevents an unauthenticated CFML template from reading or modifying administration and configuration information for this server. By default, ColdFusion will force the keys of structures to uppercase, losing the original casing of the data. This side effect can hamper your ability to manipulate structures if the case of your keys has meaning.
By enabling this setting, ColdFusion will maintain the defined case of keys in your structure. Our recommendation is to enable this setting, with the caveat that it may break existing code adapted to operate on all uppercase keys.
Addressing another security-related issue, this setting protects web services which return JSON data from cross-site scripting attacks by prefixing serialized JSON strings with a custom prefix.
We recommend that this setting is enabled. This is a potential performance-related setting.
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