In ruby the openuri modules provides this simplified interface. If you want to get the actual error raised by openuri, in ruby 2. We are seeing this in sketchup 2014 which uses embedded ruby 2. Yesterday i found myself needing to download a zipfile and extract the contents.
We can then open up a file and write the contents of the image to the file. 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. Ruby script to download a number of files from individual. This is the foundation for all web api requests, so feel free to use it in the future. 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. I have a ruby function that is supposed to download a file from the web.
Unluckily paperclip uses file name to determine extension. It loads shared libraries that may be used to run code in the binary execution context. Rubys openuri is an easytouse wrapper for net, nets and netftp. Jul, 2010 yesterday i found myself needing to download a zipfile and extract the contents. But as i write it, it freezes the ui during download. While this is easy in a shell script, in ruby its quite aggravating.
Ruby script that uses openuri to fetch the contents of a. So try it at your own risk and if it works, let me know. 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. I ended up using nets with net to implement the basic authentication over ssl. Please add documentation to openuri showing how to.
How to download a file from url and display progress in ui. Next, lets write a method that converts a url of an image into a local image file. After some googling i ended up using rubyzip, but i hope there are better libraries out there. Download a zip file and extract using rubyzip mike. Lets say we want to import a csv file that contains the fields. Dec 12, 2008 especially because open uri doesnt provide a way to specify headers for each request for redirection. If you know the ruby standard library well, the solution might be obvious to you. A safe way in ruby to download a file to disk using openuri with. Especially because openuri doesnt provide a way to specify headers for each request for redirection. Using basic authentication for ftp with open uri ruby.
While a page on a website is totally different from a file, several languages provide a way to. Browse other questions tagged ruby onrails ruby file handling or ask your own question. The file handle is automatically closed at the end of the block, so no need to call the close method. As far as i know its the most popular way to read url content, make a get request or download a file. I would like to create something similar to a selfupdater to my extension. I want to port a simple program from ruby which use openuri. We can use this to download an image and then save it as a file. Download a collection of images from urls using ruby. If it does not fit to openuri, then this can be omitted. Download a collection of images from urls using ruby cobeb. Version control, project management, deployments and your group chat in one place. 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. Have you ever needed to download and save an image in your ruby application. 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.
In ruby the open uri modules provides this simplified interface. Flowdock is a collaboration tool for technical teams. I want to port a simple program from ruby which use open uri. Ruby has a standard library available that makes this task very simple. Its important that wherever you place or write this method, youve included the openuri class. 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.
It is possible to open an, s or ftp url as though it were a file. All we need to do is open a csv file, read it, and parse it using the csv parser that comes with ruby. Digging some more and profiling the code with rubyprof revealed that during the execution of the download over 11,000 threads where being created. The file pointer is placed at the beginning of the file. It reads data from files, it may be used to do privileged reads or disclose files outside a restricted file system. To do so, we first require open uri then use the open method to access an image url. Heres a simple tip on how to parse a comma separated value or csv file using ruby. Could someone show a simple example for the openuri documentation in how users are able to obtain an attachment, if this fits to openuri. I have a small problem which is due to osx behavior with ruby here. When working on the shrine library for handling file uploads, in multiple places i needed to be able to download a file from url. If it does not fit to open uri, then this can be omitted. It returns a file object, so you should be able to call methods like read and readlines. This happens, because openuri creates a tempfile without a file extension. I want to watch the railsconf 2006 videos and want to download them with a script.
Downloading from ruby api and mac osx sketchup community. 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. 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. Ring openuri ruby sample code to open a browser via a gesture with logbar ring makevoidring openuridemo. If enc is given, convert str to the encoding before percent encoding. For example, you can open a file and read its contents with the. There are a lot of ways in which a download can fail.