For completeness, the OP does not state he is looking to do this in a browser (if he is, as has been stated, it is generally not possible) However javascript per se does allow this; it can be done with server side javascript. See this documentation on the Javascript File class Edit: That link was to … Read more
HTML5 supports the download attribute: http://webreflection.blogspot.com/2011/08/html5-how-to-create-downloads-on-fly.html Example: Clicking on this will allow the browser to handle the download (instead of opening the file using whatever application is associated with the mimetype), including a progress bar. Note: You really want to be careful not to deviate from normal user expectation by trying to create your own … Read more
You can use glob: or simply os.listdir: or if you want to traverse directory, use os.walk:
Your chunk of code does not create a new one, it only checks if its already there and nothing else.
Update 2018 While everything written below still holds true, Rails 5.2 now includes active_storage, which allows stuff like uploading directly to S3 (or other cloud storage services), image transformations, etc. You should check out the rails guide and decide for yourself what fits your needs. While there are plenty of gems that solve file uploading pretty nicely (see https://www.ruby-toolbox.com/categories/rails_file_uploads for … Read more
You opened the file for writing by specifying the mode as ‘w’; open the file for reading instead: ‘r’ is the default, so it can be omitted. If you need to both read and write, use the + mode: w+ opens the file for writing (truncates it to 0 bytes) but also lets you read from it. If you use r+ it … Read more
I don’t know what type of setup you have, but the following scenario, could I think produce such an effect (or else one similar to it). I have not tested this to verify, so please take it with a grain of salt. If the file/device you are opening implemented as a server application (eg NFS), … Read more
My code looks like this: so if I run it and enter “Ryan” then run it again and enter “Bob” the file hst.txt looks like instead of How do I fix this?
It depends on what best means for you. Productivity wise, don’t reinvent the wheel and use Apache Commons. Which is here FileUtils.readFileToByteArray(File input).
There is no way to delete a file that’s currently being used by another process. You have to close whatever program has that file open first, before you can delete it. If you don’t already know which program that is, you can figure it out using Handle or Process Explorer.