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The Pragmatic Glitch (#rubykaigi 2013 LT)
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Shimpei Makimoto
May 31, 2013
Design
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3.2k
The Pragmatic Glitch (#rubykaigi 2013 LT)
one of lightning talks in RubyKaigi 2013
31st May, 2013
Shimpei Makimoto
May 31, 2013
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Transcript
The Pragmatic Glitch Shimpei Makimoto https://github.com/makimoto https://twitter.com/makimoto one of lightning
talks in RubyKaigi 2013 | 31st May, 2013 Έͳ͞Μ͜Μʹͪɻ 5IF1SBHNBUJD(MJUDIͱ͍͏Λ͠·͢ɻ
ӳޠͰൃද͢ΔͷͰຊޠͷࣈນΛ͍Ε·ͨ͠ɻ I talk it in (poor) English, so I added
Japanese subs.
self ·ͣࣗݾհ͔Βɻ
Shimpei Makimoto / ຊ৻ฏ https://{github,twitter}.com/makimoto photo by mirakui ຊ৻ฏͱ͍͍·͢ɻ 5XJUUFS(JU)VCͰ!NBLJNPUPͱ͍͏ΞΧϯτ໊Ͱ͢ɻ
We’re hiring http://info.cookpad.com/jobs http://info.cookpad.com/en ΫοΫύου͔Βདྷ·ͨ͠ɻ ͨͩ͠ɺ͜ͷൃදࢲͷޏ༻ओͱؔ͋Γ·ͤΜɻ
Glitch ͦΕͰάϦονͷͰ͢ɻ άϦονͱԿͰ͠ΐ͏͔ʁ
me ͜ΕࢲͰ͢ɻ
me me (in glitch) ͜ΕࢲͰ͢ɻͨͩ͠άϦον͍ͯ͠·͢ɻ
It’s Glitch ͜Ε͕άϦονͰ͢ɻ͓Θ͔ΓͰ͢Ͷʁ
How? Ͳ͏ͬͯ͜ΕΛ࣮ݱ͍ͯ͠ΔͷͰ͠ΐ͏ʁͱͯ؆୯Ͱ͢ɻ
sed ‘s/a/b/g’ original.jpg > glitch.jpg ͜Ε͚ͩͰ͢ɻTFEΛͬͯจࣈBΛจࣈCʹஔ͖͍͑ͯ·͢ɻ
sed(1) glitch ͜ΕΛҰൠʹTFEάϦονͱ͍͍·͢ɻ
Ruby 3VCZΛͬͯͳ͍ʁͦ͏Ͱ͢ͶɻͰ3VCZΛͬͯΈ·͢ɻ
ruby as better sed ·ͣΑΓྑ͍TFEͱͯ͠SVCZΛ͍·͢ɻ
ruby -e 'print ARGF.read.force_encoding("ascii-8bit").gsub("a", "b")' original.jpg > glitch.jpg ͍͍ͩͨ͜ΜͳϫϯϥΠφʔͰઌ΄Ͳͷͷͱಉ͜͡ͱ͕࣮ݱͰ͖·͢ɻ
ruby --external-encoding=ascii-8bit -e 'print ARGF.read.gsub("a", "b")' original.jpg > glitch.jpg ͪΖΜ͓ΈͰ͜Μͳײ͡ʹ͍͍ͯ͠Ͱ͢ɻ
me me (in glitch) ͍ͣΕʹ͠ΖάϦονͨ͠ը૾͕࡞͞Ε·͢ɻ
data = ARGF.read.force_encoding('ascii-8bit') 36.times do |from| from = from.to_s(36) 36.times
do |to| to = to.to_s(36) open("#{from}_#{to}.jpg", 'wb').write(data.gsub(from, to)) end end ͍ͬͺ͍ը૾͕΄͚͠Ε͜ΜͳίʔυΛॻ͍͍͍ͯͰ͢ɻ
͜Μͳײ͡Ͱը૾͕େྔʹ࡞͞Ε·͢ɻ
៉ྷͰ͢Ͷɻ
Glitch in web applications ͯ͞ɺ͔͜͜Βগ͠Ԡ༻دΓͷΛ͠·͢ɻ ΣϒΞϓϦέʔγϣϯΛྫʹ͠·͠ΐ͏ɻ
Rubyistokei ͓ͦΒ͘Έͳ͞Μ3VCZJTUPLFJΛ͝ଘͩͱࢥ͍·͢ɻ
͜ΕͰ͢ɻ
I apologize before a demo ͋Β͔͡Ί֤ؔҐʹँΓ·͢ɻ
Let’s break Rubyistokei ͦΕͰ3VCZJTUPLFJΛյ͠·͠ΐ͏ɻ
Glitch Rubyistokei 3VCZJTUPLFJ͔ΒϑΥʔΫͤ͞ɺ (MJUDI3VCZJTUPLFJΛ࡞Γ·ͨ͠ɻ ແஅͰ
http://glitch-rubyistokei.herokuapp.com
إ͕ݟ͑ͨ΄͏͕ྑ͍ͱࢥͬͨͷͰɺ ͜Μͳײ͡Ͱ͚ͩյ͢ͱ͍͏͜ͱΛͯ͠Έ·ͨ͠ɻ
How? ͜Ε͕ͲͷΑ͏ʹ࣮ݱ͞Ε͍ͯΔ͔ɺ ιʔείʔυΛݟͯΒ͏ͷ͕ૣ͍Ͱ͢ɻ
3VCZJTUPLFJ4JOBUSBΞϓϦέʔγϣϯͰ͢ɻ ը૾Λյ͢ϝιουΛՃͯͦ͠ΕΛද͍ࣔͤͯ͞·͢ɻ
get '/glitch' do data = open(params[:url]).read data_a = data[0 ..
data.size / 2] data_b = data[data.size / 2 .. -1] content_type :jpeg data_a + data_b.force_encoding('ascii-8bit').gsub('a', 'b') end ͬ͟ͱݟͯΒͬͨΒΘ͔ΔΜͰ͕͢ɺ؆୯ͳϩδοΫͰ͢ɻ
get '/glitch' do data = open(params[:url]).read data_a = data[0 ..
data.size / 2] data_b = data[data.size / 2 .. -1] content_type :jpeg data_a + data_b.force_encoding('ascii-8bit').gsub('a', 'b') end ը૾ϑΝΠϧΛಡΈࠐΜͰɺͭͷϒϩοΫʹΘ͚·͢ɻ
get '/glitch' do data = open(params[:url]).read data_a = data[0 ..
data.size / 2] data_b = data[data.size / 2 .. -1] content_type :jpeg data_a + data_b.force_encoding('ascii-8bit').gsub('a', 'b') end ࠷ॳͷϒϩοΫͦͷ··ʹɺ࣍ͷϒϩοΫͰHTVC͠·ͯग़ྗ͠·͢ɻ
ͦΕʹΑͬͯ͜ͷΑ͏ʹ͚ͩյΕͨը૾͕ੜͰ͖·͢ɻ
https://github.com/makimoto/rubyistokei/tree/glitch ͜ͷϒϥϯν͜ͷ63-Ͱެ։͞Ε͍ͯ·͢ɻ
def show respond_to do |format| format.html do # snip end
format.glitch do data = open(IMAGES_PATH.join(params[:id])) data = data.force_encoding('ascii-8bit').gsub('a', 'b') send_data data, type: 'image/jpeg', disposition: 'inline' end end end ͪͳΈʹ3BJMTͰಉ༷ͷॲཧΛߦ͓͏ͱͨ͠Β͜Μͳײ͡ʹͳΓ·͢ɻ protip: Case in Rails
Wrapping up ·ͱΊ·͢ɻ
Glitch is quick and easy Glitch is useful for web
applications (JPEG is good) ͱ͍͏͜ͱͰɺάϦονૉૣ͘Ͱ͖ͯ؆୯Ͱ͢ɻ ΣϒΞϓϦέʔγϣϯͱͷੑߴ͍Ͱ͢ɻͥͻࢼ͍ͯͩ͘͠͞ɻ You can try it!!1;
The Pragmatic Glitch one of lightning talks in RubyKaigi 2013
| 31st May, 2013 Shimpei Makimoto https://github.com/makimoto https://twitter.com/makimoto