Ruby open-uri download file

Lets say we want to import a csv file that contains the fields. We can use this to download an image and then save it as a file. While a page on a website is totally different from a file, several languages provide a way to. The file handle is automatically closed at the end of the block, so no need to call the close method. We are seeing this in sketchup 2014 which uses embedded ruby 2. There are a lot of ways in which a download can fail. Download a zip file and extract using rubyzip mike. I would like to create something similar to a selfupdater to my extension. Become a contributor and improve the site yourself is made possible through a partnership with the greater ruby community. But since a sketchup user has many extensions installed there is no guaranty that one extension has not required the net lib without doing this then it break for everyone else. I want to port a simple program from ruby which use openuri. Its important that wherever you place or write this method, youve included the openuri class.

If you know the ruby standard library well, the solution might be obvious to you. Please add documentation to openuri showing how to. Ruby has a standard library available that makes this task very simple. Digging some more and profiling the code with rubyprof revealed that during the execution of the download over 11,000 threads where being created. If enc is given, convert str to the encoding before percent encoding. Could someone show a simple example for the openuri documentation in how users are able to obtain an attachment, if this fits to openuri. Unluckily paperclip uses file name to determine extension. It returns a file object, so you should be able to call methods like read and readlines. The file pointer is placed at the beginning of the file. I want to watch the railsconf 2006 videos and want to download them with a script. Especially because openuri doesnt provide a way to specify headers for each request for redirection. Heres a simple tip on how to parse a comma separated value or csv file using ruby. Alternatively you can use down, which is by default a wrapper around openuri. Version control, project management, deployments and your group chat in one place.

For example, you can open a file and read its contents with the. It reads data from files, it may be used to do privileged reads or disclose files outside a restricted file system. When working on the shrine library for handling file uploads, in multiple places i needed to be able to download a file from url. May 24, 2016 when working on the shrine library for handling file uploads, in multiple places i needed to be able to download a file from url. Download a collection of images from urls using ruby. If you want to get the actual error raised by openuri, in ruby 2. Ruby script that uses openuri to fetch the contents of a. But as i write it, it freezes the ui during download. If it does not fit to open uri, then this can be omitted. Download a collection of images from urls using ruby cobeb. If it does not fit to openuri, then this can be omitted. A safe way in ruby to download a file to disk using openuri with. Browse other questions tagged rubyonrails ruby filehandling or ask your own question.

I have a small problem which is due to osx behavior with ruby here. Encodes given str to urlencoded form data this method doesnt convert. In ruby the open uri modules provides this simplified interface. So try it at your own risk and if it works, let me know. I want to port a simple program from ruby which use open uri. Next, lets write a method that converts a url of an image into a local image file. I created it to fix some things i minded or was missing in openuri down always returns a tempfile, appends the url extension to the tempfile path, can limit maximum number of redirects, can limit maximum filesize etc. After some googling i ended up using rubyzip, but i hope there are better libraries out there. It is possible to open an, s or ftp url as though it were a file. This is based on this patch and this gem, and modified to allow redirections in both directions. Dec 12, 2008 especially because open uri doesnt provide a way to specify headers for each request for redirection. Ruby script to download a number of files from individual. After loading the module with require it overrides the standard open function so from now on, in addition to opening regular files, it will be able to open urls as well. Yesterday i found myself needing to download a zipfile and extract the contents.

Could someone show a simple example for the open uri documentation in how users are able to obtain an attachment, if this fits to open uri. Rubys openuri is an easytouse wrapper for net, nets and netftp. This happens, because openuri creates a tempfile without a file extension. Browse other questions tagged ruby onrails ruby file handling or ask your own question. It loads shared libraries that may be used to run code in the binary execution context. Flowdock is a collaboration tool for technical teams.

To do so, we first require open uri then use the open method to access an image url. A ruby programming tutorial for journalists, researchers, investigators, scientists, analysts and anyone else in the business of finding information and making it useful and visible. Become a contributor and improve the site yourself. All we need to do is open a csv file, read it, and parse it using the csv parser that comes with ruby. Using basic authentication for ftp with open uri ruby. Jul, 2010 yesterday i found myself needing to download a zipfile and extract the contents. Have you ever needed to download and save an image in your ruby application. To get around this issue, we need to create a new tempfile with a valid extension and copy openuri tempfile content to newly created one. Ring openuri ruby sample code to open a browser via a gesture with logbar ring makevoidring openuridemo. In ruby the openuri modules provides this simplified interface. I have a ruby function that is supposed to download a file from the web. There is an option in the openuri open method to use a usernamepassword but it is not used in ftp connection, the usernamepassword for ftp is always set to anonymousnil. The most popular way to download a file without any dependencies is to use the standard library open uri. We can then open up a file and write the contents of the image to the file.

I did some benchmarking and the download of a 157mb file from the local machine was taking over 20 seconds and using 100% where as wget for the same file only took 0. This is the foundation for all web api requests, so feel free to use it in the future. Downloading from ruby api and mac osx sketchup community. I ended up using nets with net to implement the basic authentication over ssl. While this is easy in a shell script, in ruby its quite aggravating. How to download a file from url and display progress in ui.