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require 'mini_magick' | |
#class InvalidInputFileError < Exception; end | |
class Converter | |
def initialize(input, output = nil) | |
#FILE nebo string | |
if html_file?(input) | |
#resit file | |
@file_input = input | |
elsif html_text?(input) | |
@text_input = input | |
#resit string | |
else | |
raise "Wrong input, .html file path or .html text expected" | |
end | |
if png_file?(output) | |
@output = output | |
else | |
if @file_input | |
@output = output_filename_from @file_input | |
else | |
@output = "result.png" | |
end | |
end | |
end | |
def convert_file | |
if @file_input | |
system(Dir.pwd+"/wkhtmltopdf-amd64",@file_input, "temporary.pdf") | |
else | |
temp = File.new("temporary.html", "w") | |
temp.write(@text_input) | |
temp.close | |
system(Dir.pwd+"/wkhtmltopdf-amd64","temporary.html", "temporary.pdf") | |
end | |
image = MiniMagick::Image.open("temporary.pdf") | |
image.format "png" | |
image.write Dir.pwd+"/"+@output | |
File.delete("temporary.pdf") | |
File.delete("temporary.html") if temp | |
end | |
protected | |
def html_file?(filename) | |
filename.match(/^(\w|\d|[\-\_])+\.html$/) | |
end | |
def png_file?(filename) | |
if filename | |
if filename.match(/^(\w|\d|[\-\_])+\.png$/) | |
return true | |
end | |
raise "Wrong output file format, expecting .png file name." | |
end | |
end | |
def html_text?(str) | |
str.match(/^<!DOCTYPE (html)|(HTML)/) | |
end | |
def output_filename_from(filename) | |
File.basename(filename, File.extname(filename)) | |
end | |
end | |
htmlstr = '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> | |
<html> | |
<head> | |
<title></title> | |
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> | |
</head> | |
<body> | |
TODO write content | |
</body> | |
</html> | |
' | |
conv = Converter.new("faktura.html", "aA_.png") | |
conv.convert_file |
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