通过 system() 从 Ruby 调用 iconv

发布于 2024-08-30 11:38:15 字数 337 浏览 13 评论 0原文

我的 iconv 工具有问题。我尝试以这种方式从 rake 文件中调用它：

Dir.glob("*.txt") do |file|
  system("iconv -f UTF-8 -t 'ASCII//TRANSLIT' #{ file } >> ascii_#{ file }")
end

但是一个文件被部分转换（部分转换的大小：10059092 字节，转换前：10081854）。比较这两个文件证明并非所有内容都写入 ASCII。当我从 shell 显式调用此命令时，它工作得很好。其他较小的文件转换没有问题。 iconv 或 Ruby 的 system() 有什么限制吗？

原文

I have a problem with iconv tool. I try to call it from rake file in that way:

Dir.glob("*.txt") do |file|
  system("iconv -f UTF-8 -t 'ASCII//TRANSLIT' #{ file } >> ascii_#{ file }")
end

But one file is converted partly (size of partialy converted: 10059092 bytes, before convertion: 10081854). Comparing this two files prove that not all content was writen to ASCII. When I call this command explicit from shell it works perfectly. Other smaller files are converted without problems. Is there any limitations on iconv or Ruby's system()?

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似狗非友 2024-09-06 11:38:15

检查系统来判断是否成功。

Dir.glob("*.txt") do |file|
  system("iconv -f UTF-8 -t 'ASCII//TRANSLIT' #{file} >> ascii_#{file}") or
    puts "iconv failed for file #{file}: #{$?}"
end

您还可以尝试使用 Iconv 标准库，从而摆脱系统调用：

require 'iconv'

source_file = 'utf8.txt'
target_file = 'ascii.txt'

File.open(target_file, 'w') do |file|
  File.open(source_file).each_line do |line|
    file.write Iconv.conv('ASCII//TRANSLIT', 'UTF-8', line)
  end
end

添加适当的错误检查。

It is always a good idea to check the return value of system to determine whether it was successful.

Dir.glob("*.txt") do |file|
  system("iconv -f UTF-8 -t 'ASCII//TRANSLIT' #{file} >> ascii_#{file}") or
    puts "iconv failed for file #{file}: #{$?}"
end

You could also try using the Iconv standard library, and thus get rid of the system call:

require 'iconv'

source_file = 'utf8.txt'
target_file = 'ascii.txt'

File.open(target_file, 'w') do |file|
  File.open(source_file).each_line do |line|
    file.write Iconv.conv('ASCII//TRANSLIT', 'UTF-8', line)
  end
end

with appropriate error checking added.

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