I am trying to parse multiple XML files then output them into CSV files to list out the proper rows and columns.
I was able to do so by processing one file at a time by defining the filename, and specifically output them into a defined output file name:
File.open('H:/output/xmloutput.csv','w')
I would like to write into multiple files and make their name the same as the XML filenames without hard coding it. I tried doing it multiple ways but have had no luck so far.
Sample XML:
<?xml version="1.0" encoding="UTF-8"?>
<record:root>
<record:Dataload_Request>
<record:name>Bob Chuck</record:name>
<record:Address_Data>
<record:Street_Address>123 Main St</record:Street_Address>
<record:Postal_Code>12345</record:Postal_Code>
</record:Address_Data>
<record:Age>45</record:Age>
</record:Dataload_Request>
</record:root>
Here is what I've tried:
require 'nokogiri'
require 'set'
files = ''
input_folder = "H:/input"
output_folder = "H:/output"
if input_folder[input_folder.length-1,1] == '/'
input_folder = input_folder[0,input_folder.length-1]
end
if output_folder[output_folder.length-1,1] != '/'
output_folder = output_folder + '/'
end
files = Dir[input_folder + '/*.xml'].sort_by{ |f| File.mtime(f)}
file = File.read(input_folder + '/' + files)
doc = Nokogiri::XML(file)
record = {} # hashes
keys = Set.new
records = [] # array
csv = ""
doc.traverse do |node|
value = node.text.gsub(/\n +/, '')
if node.name != "text" # skip these nodes: if class isnt text then skip
if value.length > 0 # skip empty nodes
key = node.name.gsub(/wd:/,'').to_sym
if key == :Dataload_Request && !record.empty?
records << record
record = {}
elsif key[/^root$|^document$/]
# neglect these keys
else
key = node.name.gsub(/wd:/,'').to_sym
# in case our value is html instead of text
record[key] = Nokogiri::HTML.parse(value).text
# add to our key set only if not already in the set
keys << key
end
end
end
end
# build our csv
File.open('H:/output/.*csv', 'w') do |file|
file.puts %Q{"#{keys.to_a.join('","')}"}
records.each do |record|
keys.each do |key|
file.write %Q{"#{record[key]}",}
end
file.write "\n"
end
print ''
print 'output files ready!'
print ''
end
I have been getting 'read memory': no implicit conversion of Array into String (TypeError) and other errors.
Here's a quick peer-review of your code, something like you'd get in a corporate environment...
Instead of writing:
input_folder = "H:/input"
input_folder[input_folder.length-1,1] == '/' # => false
Consider doing it using the -1 offset from the end of the string to access the character:
input_folder[-1] # => "t"
That simplifies your logic making it more readable because it's lacking unnecessary visual noise:
input_folder[-1] == '/' # => false
See [] and []= in the String documentation.
This looks like a bug to me:
files = Dir[input_folder + '/*.xml'].sort_by{ |f| File.mtime(f)}
file = File.read(input_folder + '/' + files)
files is an array of filenames. input_folder + '/' + files is appending an array to a string:
foo = ['1', '2'] # => ["1", "2"]
'/parent/' + foo # =>
# ~> -:9:in `+': no implicit conversion of Array into String (TypeError)
# ~> from -:9:in `<main>'
How you want to deal with that is left as an exercise for the programmer.
doc.traverse do |node|
is icky because it sidesteps the power of Nokogiri being able to search for a particular tag using accessors. Very rarely do we need to iterate over a document tag by tag, usually only when we're peeking at its structure and layout. traverse is slower so use it as a very last resort.
length is nice but isn't needed when checking whether a string has content:
value = 'foo'
value.length > 0 # => true
value > '' # => true
value = ''
value.length > 0 # => false
value > '' # => false
Programmers coming from Java like to use the accessors but I like being lazy, probably because of my C and Perl backgrounds.
Be careful with sub and gsub as they don't do what you're thinking they do. Both expect a regular expression, but will take a string which they do a escape on before beginning their scan.
You're passing in a regular expression, which is OK in this case, but it could cause unexpected problems if you don't remember all the rules for pattern matching and that gsub scans until the end of the string:
foo = 'wd:barwd:' # => "wd:barwd:"
key = foo.gsub(/wd:/,'') # => "bar"
In general I recommend people think a couple times before using regular expressions. I've seen some gaping holes opened up in logic written by fairly advanced programmers because they didn't know what the engine was going to do. They're wonderfully powerful, but need to be used surgically, not as a universal solution.
The same thing happens with a string, because gsub doesn't know when to quit:
key = foo.gsub('wd:','') # => "bar"
So, if you're looking to change just the first instance use sub:
key = foo.sub('wd:','') # => "barwd:"
I'd do it a little differently though.
foo = 'wd:bar'
I can check to see what the first three characters are:
foo[0,3] # => "wd:"
Or I can replace them with something else using string indexing:
foo[0,3] = ''
foo # => "bar"
There's more but I think that's enough for now.
You should use Ruby's CSV class. Also, you don't need to do any string matching or regex stuff. Use Nokogiri to target elements. If you know the node names in the XML will be consistent it should be pretty simple. I'm not exactly sure if this is the output you want, but this should get you in the right direction:
require 'nokogiri'
require 'csv'
def xml_to_csv(filename)
xml_str = File.read(filename)
xml_str.gsub!('record:','') # remove the record: namespace
doc = Nokogiri::XML xml_str
csv_filename = filename.gsub('.xml', '.csv')
CSV.open(csv_filename, 'wb' ) do |row|
row << ['name', 'street_address', 'postal_code', 'age']
row << [
doc.xpath('//name').text,
doc.xpath('//Street_Address').text,
doc.xpath('//Postal_Code').text,
doc.xpath('//Age').text,
]
end
end
# iterate over all xml files
Dir.glob('*.xml').each { |filename| xml_to_csv(filename) }
I wrote a Ruby script to check if the layer found in DOM in Firebug for the page www.jira.com is matching with the hash values declared in my script. Below is the Ruby script I have written:
require 'watir'
browser = Watir::Browser.new(:chrome)
browser.goto('https://jira.com')
JIRA_DATA_LAYER = {
'jira' => {
'event' => ['gtm.js', 'gtm.load'],
'gtm.start' => '1468949036556',
}
}
def get_jira_data_layer(get_data_layer)
result = []
get_data_layer.each do |data_layer|
data_layer.each do |data_layer_key, data_layer_value|
result << {"#{data_layer_key}" => data_layer_value}
end
end
return result
end
def compare_jira_data_layer(layer, jira_name)
message = []
index = 0
JIRA_DATA_LAYER[jira_name].each do |jira_key, jira_value|
if layer.include?({jira_key => jira_value})
result = 'matches - PASS'
else
result = 'matches - FAIL'
end
index += 1
message.push("'#{jira_key} => #{jira_value}' #{result}")
end
return message.join("\n")
end
data_layer = browser.execute_script("return dataLayer")
get_data_layer = get_jira_data_layer(data_layer)
compare_data_layer = compare_jira_data_layer(get_data_layer, "jira")
puts compare_data_layer
I am getting the following output:
'event => ["gtm.js", "gtm.load"]' matches - FAIL
'gtm.start => 1468949036556' matches - FAIL
I want the following to be achieved:
'event => gtm.js' matches - FAIL
'gtm.start => 1468949036556' matches - FAIL
You could simply change the value for event key in JIRA_DATA_LAYER, but I guess it has to be that way.
Try to expand if sentence when checking key for this hash and use is_a? method to check whether value for particular key is array or not. If so, loop through each member of this array.
I have a string:
string = <RECALL>first_name</RECALL>, I'd like to send you something. It'll help you learn more about both me and yourself. What is your email?"
I want to pull out the value "first_name" of the tag <RECALL>.
I used gem crack, but it doesn't behave as I expected:
parsed = Crack::XML.parse(string) =>
{"RECALL"=>"first_name, I'd like to send you something. It'll help you learn more about both me and yourself. What is your email?"}
Maybe XML parsing isn't the right way. What is the way so that I could get the following, desired behavior, instead?
{"RECALL"=>"first_name"}
Does not look like valid XML to me. I would just try to use an REGEXP here:
string = "<RECALL>first_name</RECALL>, I'd like to send you something..."
/<RECALL>(.*)<\/RECALL>/.match(string)[1]
#=> "first_name"
Here's two ways you could get the content of the tags:
string = "<RECALL>first_name</RECALL>"
firstname = string[/<RECALL>([^<]+)</, 1]
firstname # => "first_name"
Parsing strings containing tags gets tricky. It's doable for simple content, but once tags are nested or additional < or > show up, it gets a lot harder.
You can use a trick using an XML parser:
require 'nokogiri'
string = "foo <RECALL>first_name</RECALL> bar"
doc = Nokogiri::XML::DocumentFragment.parse(string)
doc.at('RECALL').text # => "first_name"
Note that I'm using Nokogiri::XML::DocumentFragment.parse. That tells Nokogiri to only expect a partial XML document and relaxes a lot of its normally strict XML rules. Then I can tell the parser to find the <RECALL> tag and grab its contained text.
...wondering if there's a way to extract it (I use Crack to extract it, but it only works if the <tag> is at the end of the string.
This pattern matches mid-string:
str = "foo <RECALL>first_name</RECALL> bar"
str[%r!<RECALL>([^<]+)</RECALL>!, 1] # => "first_name"
This pattern fails if the tag is not at the end of the string:
str[%r!<RECALL>([^<]+)</RECALL>\z!, 1] # => nil
And succeeds if it is at the end of the string:
str = "foo <RECALL>first_name</RECALL>"
str[%r!<RECALL>([^<]+)</RECALL>\z!, 1] # => "first_name"
This is one place where a regexp pattern makes it easier to do something than using a parser.
Using a parser:
require 'nokogiri'
Normally we don't care where a tag occurs in a DOM, but if it's important we can figure out where it is in relation to the other tags. It won't always be this straightforward though:
This returns nil if the tag isn't at the end of the string/DOM:
str = "foo <RECALL>first_name</RECALL> bar"
doc = Nokogiri::XML::DocumentFragment.parse(str)
recall_node = doc.at('RECALL')
recall_node == doc.children.last ? doc.at('RECALL').text : nil # => nil
This returns the text of the node because it is at the end of the DOM:
str = "foo <RECALL>first_name</RECALL>"
doc = Nokogiri::XML::DocumentFragment.parse(str)
recall_node = doc.at('RECALL')
recall_node == doc.children.last ? doc.at('RECALL').text : nil # => "first_name"
This works because every node in a document has an identifier and we can ask whether the node of interest matches the last node in the DOM:
require 'nokogiri'
doc = Nokogiri::XML::DocumentFragment.parse("<node>first_name</node> text")
# => #(DocumentFragment:0x3ffc89c3d3e8 {
# name = "#document-fragment",
# children = [
# #(Element:0x3ffc89c3cf9c {
# name = "node",
# children = [ #(Text "first_name")]
# }),
# #(Text " text")]
# })
doc.at('node').object_id.to_s(16) # => "3ffc89c3cf9c"
doc.children.last.object_id.to_s(16) # => "3ffc89c3cec0"
doc = Nokogiri::XML::DocumentFragment.parse("<node>first_name</node>")
# => #(DocumentFragment:0x3ffc89c345cc {
# name = "#document-fragment",
# children = [
# #(Element:0x3ffc89c342c0 {
# name = "node",
# children = [ #(Text "first_name")]
# })]
# })
doc.at('node').object_id.to_s(16) # => "3ffc89c342c0"
doc.children.last.object_id.to_s(16) # => "3ffc89c342c0"
I have a data file about 1000000 lines, 300+ Mb. I want to convert it to a JSON file.
JSON.generate and Hash.merge can help generate JSON, but I need to wait for the program to generate one whole hash. That costs too much time.
I want to write JSON to file incrementally.
Here is my code:
require 'yajl/json_gem'
my_hash = {}
fd1 = File.open("foo.json", "w")
fd2 = File.open("foo.log")
fd2.each_line do | line |
l = fd2.lineno
remote_addr = line.split(" ")[0]
time_local = line.split("]")[0].split("[")[1]
item = {l => {:remote_addr => remote_addr, :time_local => time_local}}
# {
# 1: {
# remote_addr: "1.2.3.4",
# time_local: ""
# },
# 2: {
# ...
# },
# ...
# }
my_hash.merge!(item)
end
fd2.close
fd1.puts JSON.generate(my_hash)
fd1.close
Here is my data:
// access.log
1.2.3.4 - - [02/Apr/2014:03:23:06 +0800] "GET /index" 200 1 "http://foo" "Mozilla/5.0" "-"
Any ideas? Thanks in advance.
--
edit:
Actually, I'd better convert raw data like this:
[
{
id: "1",
remote_addr: "1.2.3.4",
time_local: "02/Apr/2014:03:23:06 +0800"
},
{
...
},
{
...
}
]
This is basic code to generate a valid JSON output based on the sample line:
require 'json'
lines = [
'1.2.3.4 - - [02/Apr/2014:03:23:06 +0800] "GET /index" 200 1 "http://foo" "Mozilla/5.0" "-"',
'1.2.3.5 - - [03/Apr/2014:03:23:06 +0800] "GET /index" 200 1 "http://foo" "Mozilla/5.0" "-"'
]
lines.each_with_index do |line, l|
puts '{' if l == 0
remote_addr, time_local = /^(\S+) .+ \[(.+)\]/.match(line).captures
print '"%d":{"remote_addr":"%s","time_local":"%s"}' % [l + 1, remote_addr, time_local]
puts ',' if l + 1 < lines.size
end
puts "\n}"
# >> {
# >> "1":{"remote_addr":"1.2.3.4","time_local":"02/Apr/2014:03:23:06 +0800"},
# >> "2":{"remote_addr":"1.2.3.5","time_local":"03/Apr/2014:03:23:06 +0800"}
# >> }
You'll need to convert the code to read and write files, or maybe read a single file and redirect the output to capture it. You'll also need to figure out how to determine the number of lines in a file to make it possible to find the places to output the commas. It's easy, and I know examples of doing that exist here on Stack Overflow.
In your original code you need to use the block form for open, rather than assigning to a variable and then explicitly closing the files; Using the block form of open is the Ruby-way. Also, use File.foreach to read through a file line-by-line.
#theTinMan posted a good answer, I will just add that a little more generic solution for a list of JSON object is to construct the list yourself, but let JSON generate each item:
fd1.puts '{'
fd1 = File.open("foo.json", "w")
fd2 = File.open("foo.log")
first_line = true
fd2.each_line do | line |
fd1.puts(',') unless first_line
first_line = false
l = fd2.lineno
remote_addr = line.split(" ")[0]
time_local = line.split("]")[0].split("[")[1]
fd1.print "\"#{l}\": #{JSON.generate(:remote_addr => remote_addr, :time_local => time_local)}"
end
fd1.puts "\n}"
I'm generating some CSV output using Ruby's built-in CSV. Everything works fine, but the customer wants the name field in the output to have wrapping double-quotes so the output looks like the input file. For instance, the input looks something like this:
1,1.1.1.1,"Firstname Lastname",more,fields
2,2.2.2.2,"Firstname Lastname, Jr.",more,fields
CSV's output, which is correct, looks like:
1,1.1.1.1,Firstname Lastname,more,fields
2,2.2.2.2,"Firstname Lastname, Jr.",more,fields
I know CSV is doing the right thing by not double-quoting the third field just because it has embedded blanks, and wrapping the field with double-quotes when it has the embedded comma. What I'd like to do, to help the customer feel warm and fuzzy, is tell CSV to always double-quote the third field.
I tried wrapping the field in double-quotes in my to_a method, which creates a "Firstname Lastname" field being passed to CSV, but CSV laughed at my puny-human attempt and output """Firstname Lastname""". That is the correct thing to do because it's escaping the double-quotes, so that didn't work.
Then I tried setting CSV's :force_quotes => true in the open method, which output double-quotes wrapping all fields as expected, but the customer didn't like that, which I expected also. So, that didn't work either.
I've looked through the Table and Row docs and nothing appeared to give me access to the "generate a String field" method, or a way to set a "for field n always use quoting" flag.
I'm about to dive into the source to see if there's some super-secret tweaks, or if there's a way to monkey-patch CSV and bend it to do my will, but wondered if anyone had some special knowledge or had run into this before.
And, yes, I know I could roll my own CSV output, but I prefer to not reinvent well-tested wheels. And, I'm also aware of FasterCSV; That's now part of Ruby 1.9.2, which I'm using, so explicitly using FasterCSV buys me nothing special. Also, I'm not using Rails and have no intention of rewriting it in Rails, so unless you have a cute way of implementing it using a small subset of Rails, don't bother. I'll downvote any recommendations to use any of those ways just because you didn't bother to read this far.
Well, there's a way to do it but it wasn't as clean as I'd hoped the CSV code could allow.
I had to subclass CSV, then override the CSV::Row.<<= method and add another method forced_quote_fields= to make it possible to define the fields I want to force-quoting on, plus pull two lambdas from other methods. At least it works for what I want:
require 'csv'
class MyCSV < CSV
def <<(row)
# make sure headers have been assigned
if header_row? and [Array, String].include? #use_headers.class
parse_headers # won't read data for Array or String
self << #headers if #write_headers
end
# handle CSV::Row objects and Hashes
row = case row
when self.class::Row then row.fields
when Hash then #headers.map { |header| row[header] }
else row
end
#headers = row if header_row?
#lineno += 1
#do_quote ||= lambda do |field|
field = String(field)
encoded_quote = #quote_char.encode(field.encoding)
encoded_quote +
field.gsub(encoded_quote, encoded_quote * 2) +
encoded_quote
end
#quotable_chars ||= encode_str("\r\n", #col_sep, #quote_char)
#forced_quote_fields ||= []
#my_quote_lambda ||= lambda do |field, index|
if field.nil? # represent +nil+ fields as empty unquoted fields
""
else
field = String(field) # Stringify fields
# represent empty fields as empty quoted fields
if (
field.empty? or
field.count(#quotable_chars).nonzero? or
#forced_quote_fields.include?(index)
)
#do_quote.call(field)
else
field # unquoted field
end
end
end
output = row.map.with_index(&#my_quote_lambda).join(#col_sep) + #row_sep # quote and separate
if (
#io.is_a?(StringIO) and
output.encoding != raw_encoding and
(compatible_encoding = Encoding.compatible?(#io.string, output))
)
#io = StringIO.new(#io.string.force_encoding(compatible_encoding))
#io.seek(0, IO::SEEK_END)
end
#io << output
self # for chaining
end
alias_method :add_row, :<<
alias_method :puts, :<<
def forced_quote_fields=(indexes=[])
#forced_quote_fields = indexes
end
end
That's the code. Calling it:
data = [
%w[1 2 3],
[ 2, 'two too', 3 ],
[ 3, 'two, too', 3 ]
]
quote_fields = [1]
puts "Ruby version: #{ RUBY_VERSION }"
puts "Quoting fields: #{ quote_fields.join(', ') }", "\n"
csv = MyCSV.generate do |_csv|
_csv.forced_quote_fields = quote_fields
data.each do |d|
_csv << d
end
end
puts csv
results in:
# >> Ruby version: 1.9.2
# >> Quoting fields: 1
# >>
# >> 1,"2",3
# >> 2,"two too",3
# >> 3,"two, too",3
This post is old, but I can't believe no one thought of this.
Why not do:
csv = CSV.generate :quote_char => "\0" do |csv|
where \0 is a null character, then just add quotes to each field where they are needed:
csv << [product.upc, "\"" + product.name + "\"" # ...
Then at the end you can do a
csv.gsub!(/\0/, '')
I doubt if this will help the customer feeling warm and fuzzy after all this time, but this seems to work:
require 'csv'
#prepare a lambda which converts field with index 2
quote_col2 = lambda do |field, fieldinfo|
# fieldinfo has a line- ,header- and index-method
if fieldinfo.index == 2 && !field.start_with?('"') then
'"' + field + '"'
else
field
end
end
# specify above lambda as one of the converters
csv = CSV.read("test1.csv", :converters => [quote_col2])
p csv
# => [["aaa", "bbb", "\"ccc\"", "ddd"], ["fff", "ggg", "\"hhh\"", "iii"]]
File.open("test1.txt","w"){|out| csv.each{|line|out.puts line.join(",")}}
CSV has a force_quotes option that will force it to quote all fields (it may not have been there when you posted this originally). I realize this isn't exactly what you were proposing, but it's less monkey patching.
2.1.0 :008 > puts CSV.generate_line [1,'1.1.1.1','Firstname Lastname','more','fields']
1,1.1.1.1,Firstname Lastname,more,fields
2.1.0 :009 > puts CSV.generate_line [1,'1.1.1.1','Firstname Lastname','more','fields'], force_quotes: true
"1","1.1.1.1","Firstname Lastname","more","fields"
The drawback is that the first integer value ends up listed as a string, which changes things when you import into Excel.
It's been a long time, but since the CSV library has been patched, this might help someone if they're now facing this issue:
require 'csv'
# puts CSV::VERSION # this should be 3.1.9+
headers = ['id', 'ip', 'name', 'foo', 'bar']
data = [
[1, '1.1.1.1','Firstname Lastname','more','fields'],
[2, '2.2.2.2','Firstname Lastname, Jr.','more','fields']
]
quoter = Proc.new do |field, field_meta|
# the index starts at zero, that's why the third field would be 2:
field = '"' + field + '"' if field_meta.index == 2 && fields_meta.index > 1
field = '"' + field + '"' if field.is_a?(String) && field.include?(',')
# ^ CSV format needs to escape fields containing comma(s): ,
field
end
file = CSV.generate(headers: true, quote_char: '', write_converters: quoter) do |csv|
csv << headers
data.each { |row| csv << row }
end
puts file
the output would be:
id,ip,name,foo,bar
1,1.1.1.1,"Firstname Lastname",more,fields
2,2.2.2.2,"Firstname Lastname, Jr.",more,fields
It doesn't look like there's any way to do this with the existing CSV implementation short of monkey-patching/rewriting it.
However, assuming you have full control over the source data, you could do this:
Append a custom string including a comma (i.e. one that would never be naturally found in the data) to the end of the field in question for each row; maybe something like "FORCE_COMMAS,".
Generate the CSV output.
Now that you have CSV output with quotes on every row for your field, remove the custom string: csv.gsub!(/FORCE_COMMAS,/, "")
Customer feels warm and fuzzy.
CSV has changed a bit in Ruby 2.1 as mentioned by #jwadsack, however here's an working version of #the-tin-man's MyCSV. Bit modified, you set the forced_quote_fields via options.
MyCSV.generate(forced_quote_fields: [1]) do |_csv|...
The modified code
require 'csv'
class MyCSV < CSV
def <<(row)
# make sure headers have been assigned
if header_row? and [Array, String].include? #use_headers.class
parse_headers # won't read data for Array or String
self << #headers if #write_headers
end
# handle CSV::Row objects and Hashes
row = case row
when self.class::Row then row.fields
when Hash then #headers.map { |header| row[header] }
else row
end
#headers = row if header_row?
#lineno += 1
output = row.map.with_index(&#quote).join(#col_sep) + #row_sep # quote and separate
if #io.is_a?(StringIO) and
output.encoding != (encoding = raw_encoding)
if #force_encoding
output = output.encode(encoding)
elsif (compatible_encoding = Encoding.compatible?(#io.string, output))
#io.set_encoding(compatible_encoding)
#io.seek(0, IO::SEEK_END)
end
end
#io << output
self # for chaining
end
def init_separators(options)
# store the selected separators
#col_sep = options.delete(:col_sep).to_s.encode(#encoding)
#row_sep = options.delete(:row_sep) # encode after resolving :auto
#quote_char = options.delete(:quote_char).to_s.encode(#encoding)
#forced_quote_fields = options.delete(:forced_quote_fields) || []
if #quote_char.length != 1
raise ArgumentError, ":quote_char has to be a single character String"
end
#
# automatically discover row separator when requested
# (not fully encoding safe)
#
if #row_sep == :auto
if [ARGF, STDIN, STDOUT, STDERR].include?(#io) or
(defined?(Zlib) and #io.class == Zlib::GzipWriter)
#row_sep = $INPUT_RECORD_SEPARATOR
else
begin
#
# remember where we were (pos() will raise an exception if #io is pipe
# or not opened for reading)
#
saved_pos = #io.pos
while #row_sep == :auto
#
# if we run out of data, it's probably a single line
# (ensure will set default value)
#
break unless sample = #io.gets(nil, 1024)
# extend sample if we're unsure of the line ending
if sample.end_with? encode_str("\r")
sample << (#io.gets(nil, 1) || "")
end
# try to find a standard separator
if sample =~ encode_re("\r\n?|\n")
#row_sep = $&
break
end
end
# tricky seek() clone to work around GzipReader's lack of seek()
#io.rewind
# reset back to the remembered position
while saved_pos > 1024 # avoid loading a lot of data into memory
#io.read(1024)
saved_pos -= 1024
end
#io.read(saved_pos) if saved_pos.nonzero?
rescue IOError # not opened for reading
# do nothing: ensure will set default
rescue NoMethodError # Zlib::GzipWriter doesn't have some IO methods
# do nothing: ensure will set default
rescue SystemCallError # pipe
# do nothing: ensure will set default
ensure
#
# set default if we failed to detect
# (stream not opened for reading, a pipe, or a single line of data)
#
#row_sep = $INPUT_RECORD_SEPARATOR if #row_sep == :auto
end
end
end
#row_sep = #row_sep.to_s.encode(#encoding)
# establish quoting rules
#force_quotes = options.delete(:force_quotes)
do_quote = lambda do |field|
field = String(field)
encoded_quote = #quote_char.encode(field.encoding)
encoded_quote +
field.gsub(encoded_quote, encoded_quote * 2) +
encoded_quote
end
quotable_chars = encode_str("\r\n", #col_sep, #quote_char)
#quote = if #force_quotes
do_quote
else
lambda do |field, index|
if field.nil? # represent +nil+ fields as empty unquoted fields
""
else
field = String(field) # Stringify fields
# represent empty fields as empty quoted fields
if field.empty? or
field.count(quotable_chars).nonzero? or
#forced_quote_fields.include?(index)
do_quote.call(field)
else
field # unquoted field
end
end
end
end
end
end