way 1
For creating PDFs i refereed these links(http://www.railstips.org/blog/archives/2008/10/13/how-to-generate-pdfs-in-rails-with-prawn/, http://stackoverflow.com/questions/8641941/rails-plugin-install-git-github-com-thorny-sun-prawnto-git-is-not-working-in)
I found few updates have to do on it. So writing this blog. Found any correction comment down without fail.
ruby - 1.9.3
rails - 3.2
create new project in rails
rails new prawn_sample
you can find gem file inside project folder, add prawn gem.
gem 'prawn'
gem "prawnto_2", :require => "prawnto"
then bundle install
now, install prawnto plugin
rails plugin install git@github.com:forrest/prawnto.git
For sample data to display, let’s create a Book model with title,author and description.
rails generate scaffold book title:string author:string description:text
then
rake db:migrate
now start the server and enter sample data's to test
so,
rails s
localhost:3000/books
here enter the required amount of data's
next
Let’s get started with something simple and add a pdf version of the show action. Open up the books controller and add format.pdf
def show
@book = Book.find(params[:id])
respond_to do |format|
format.html # show.html.erb
format.xml { render :xml => @book }
format.pdf { render :layout => false }
end
end
create the show.pdf.prawn file inside app/views/books. For now, lets have hello world
pdf.text "Hello World!"
visit
http://localhost:3000/books/1
http://localhost:3000/books/1.pdf
you successfully generated PDF.
Let’s make the view specific to the books.
in show.pdf.prawn
pdf.font "Helvetica"
pdf.text "Book: #{@book.title}", :size => 16, :style => :bold, :spacing => 4
pdf.text "Author: #{@book.author}", :spacing => 16
pdf.text @book.description
now you see some text with format specified above . Browse more for format you required.
way 2
Reference (http://stackoverflow.com/questions/8658302/unable-to-render-pdf-to-browser-using-prawn-pdf-for-ruby-on-rails)
Gemfile
gem 'prawn'
/config/initializers/mime_types.rb
Mime::Type.register "application/pdf", :pdf
AuditsController
def show
@audit = Audit.find(params[:id])
respond_to do |format|
format.html
format.pdf do
pdf = Prawn::Document.new
pdf.text "This is an audit."
send_data pdf.render, type: "application/pdf", disposition: "inline"
end
end
end
Monday 23 December 2013
How To Generate PDFs in Rails With Prawn(ruby 1.9.3 and rails 3.2)
Friday 18 October 2013
Python code to crawl the web page
import thread
from lxml import html
import requests
import thread
tocrawl = ["link","link"]
def print_def( threadName):
page = requests.get(crawling)
tree = html.fromstring(page.text)
text = tree.xpath('//item')
print text
f = open('myfile','a+')
f.write(str(text)+"/n")
f.close
try:
for crawling in tocrawl:
thread.start_new_thread( print_def, (crawling,) )
except:
print "Error: unable to start thread"
while 1:
pass
simple html with javascript validation
<html>
<script>
function validation()
{
//first name
var a = document.form.firstName.value;
if(a=="")
{
alert("Please Enter Your First Name");
document.form.firstName.focus();
return false;
}
if(!isNaN(a))
{
alert("Please Enter Only Characters");
document.form.firstName.select();
return false;
}
if ((a.length < 5) || (a.length > 15))
{
alert("Your Character must be 5 to 15 Character");
document.form.firstName.select();
return false;
}
//last name
var a = document.form.lastName.value;
if(a == "")
{
alert("Please Enter Your Last Name");
document.form.lastName.focus();
return false;
}
if(!isNaN(a))
{
alert("Please Enter Only Characters");
document.form.lastName.select();
return false;
}
//gender validation
if(document.form.gender.value == "-1")
{
alert( "Please provide your Gender!" );
return false;
}
//address
var c = document.form.address.value;
if(c == "")
{
alert("Please Enter Your Address");
document.form.lastName.focus();
return false;
}
//cell
var d = document.form.cell.value;
if(d == "")
{
alert("Please Enter Your cell num");
document.form.lastName.focus();
return false;
}
if(isNaN(d))
{
alert("Please Enter numbers not characters");
document.form.lastName.select();
return false;
}
if (d.length < 10)
{
alert("Plz enter correct cell number");
document.form.firstName.select();
return false;
}
//country
if(document.form.country.value == "-1")
{
alert( "Please select your Country!" );
return false;
}
}
</script>
<head>
</head>
<body>
<form name="form" method="post" onsubmit="return validation()">
<table width="100%" height="100%" bgcolor="#E0F8F7" align="center">
<tr>
<td colspan=3 ><font size=3 color=red><right><b>USER ADDITIONAL INFORMATION FORM</b></right>
</tr>
<tr>
<td width="30%">First Name:<br/></td>
<td><input type="text" size=25 maxlength=20 name="firstName"></td>
</tr>
<tr>
<td width="30%">Last Name:<br/></td>
<td><input type="text" size=25 maxlength=20 name="lastName"></td>
</tr>
<tr>
<td width="30" valign="middle">Gender:</td>
<td><select name="gender">
<option value="-1" selected>---Select---</option>
<option value="1">Male</option>
<option value="2">Female</option>
</select>
</td>
</tr>
<tr>
<td width="30%">Adress:<br/></td>
<td><textarea rows=3 colos=30 name="address"></textarea></td>
</tr>
<tr>
<td width="30%">Cell no:<br/></td>
<td><input type="text" size=25 maxlength=10 name="cell"></td>
</tr>
<tr>
<td width="30" valign="middle">Select Country :</td>
<td><select name="country">
<option value="-1"selected>---Select---</option>
<option value="1">India</option>
<option value="2">Country</option>
<option value="3">Country</option>
<option value="4">Country</option>
<option value="5">Country</option>
<option value="6">Country</option>
</select></td>
</tr>
<tr>
<td ><input type="Reset">
<td ><input type="submit" value="Submit">
</tr>
</table>
</form>
</body>
</html>
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