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Once I began playing with wkhtmltopdf I found that there were two Ruby/Rails gems/libraries available to help with this: It was this resource which led me to look at wkhtmltopdf: In it he describes three methods of generating pdfs and the pros/cons to each. ![]() I recommend someone making this decision to visit John McCaffreys site and watch his screencast. In the past I have been happy enough with the latter, but on first glance what was available for Rails was either not ready for prime time or costly (Prince). #Pdfkit gem 0.5 printing blank page pdf#The author, Jakob Truelsen (( ]( ))) was very helpful and responsive when I emailed him directly about a problem to which I could not find an answer.īack to the main event now, there was the decision to use a DSL such as Prawn or to find an html to pdf converter. #Pdfkit gem 0.5 printing blank page archive#( Google Code Archive - Long-term storage for Google Code Project Hosting.]( Google Code Archive - Long-term storage for Google Code Project Hosting.)) To digress for a moment, this is the site for wkthmltopdf: #Pdfkit gem 0.5 printing blank page trial#I went through some trial and error and research in several areas before I came up with what ended up working for us, which is wkhtmltopdf (Web Kit Html to Pdf). I recently had the requirement of serving a certain report from a Rails based system in pdf format. Title: Using wkhtmltopdf with Ruby and Railsĭescription: Pdf generation with wkhtmltopdf on Rails ![]() PS, I am copying the text of my blog below… may not be pretty but in there is some info on installing the static binary: If anyone has any pointers they would be greatly appreciated It kind of feels like I have drifted down the wrong path completely with I'm still getting a permissionĭenied exception but as far as I can tell the file is rwx for all This didn't go smoothly and I had to add the directory and change some #Pdfkit gem 0.5 printing blank page install#Install wkhtmltopdf by hand or try running `pdfkit -install-wkhtmltopdf` No wkhtmltopdf executable found at /usr/local/bin/wkhtmltopdf Of the pages in my app and I got the following action controller I then tried to see if a could get a pdf version of one I added PDFkit to my gemfile and the appropriate config options to myĪpplication.rb. It is a rails 3 app, 1.9.2 running on snow leopard. I was wondering if anyoneĮlse has experienced similar problems or has any clues as to what is When I ran into a few problems installing wkhtmltopdf ( I also postedĪbout my problem in the episode comments). Recommended Reading: Python time.I was following along with Ryan Bates' really great railscast on PDFkit We have used time.sleep(0.5) and time.sleep(0.75) to suspend execution of these two threads for 0.5 seconds and 0.7 seconds respectively. T1 = threading.Thread(target=print_hello) However, the function suspends a thread rather than the whole process in multithreaded programs.Įxample 4: sleep() in a multithreaded program import threading In case of single-threaded programs, sleep() suspends execution of the thread and process. The sleep() function suspends execution of the current thread for a given number of seconds. Visit this page to learn more about Multithreading in Python. Note that, t1 and t2 run concurrently and you might get different output. These threads are run using t1.start() and t2.start() statements. The above program has two threads t1 and t2. When you run the program, the output will be something like: T2 = threading.Thread(target=print_hi_three_times) T1 = threading.Thread(target=print_hello_three_times) Here's an example of a multithreaded Python program. A process can have one or more threads.Īll the programs above in this article are single-threaded programs. A process is the execution of those instructions.Ī thread is a subset of the process. To learn more, visit digital clock in Python shell.īefore talking about sleep() in multithreaded programs, let's talk about processes and threads.Ī computer program is a collection of instructions. Here is a slightly modified better version of the above program. When you run the program, the output will be something like: 02:10:50 PM Again, the current local time is computed and printed. In the above program, we computed and printed the current local time inside the infinite while loop. Result = time.strftime("%I:%M:%S %p", localtime) Since Python 3.5, the suspension time will be at least the seconds specified.Įxample 2: Python create a digital clock import time
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