FastAPIで始める やまなし温泉めぐり

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1. 2021. 7. 15 ͠Έͣ Ώ͏͖ 1 ʲ৴ݰύΠ LTେձ ΈΜͳͷ FastAPIʳ

   FastAPI Ͱ࢝ΊΔ ΍·ͳ͠ ԹઘΊ͙Γ

2. ͓·͑୭Αʁ ͠Έͣ Ώ͏͖ • Android / iOS ϓϩάϥϚ • ࢁསੜ·Ε

   ࢁསҭͪ ˞
   ݱࡏ͸౦ژʹग़Ք͗த 5೥໨ 2

3. ͸͡Ίʹ ઌ݄։࠵͞Εͨ৴ݰύΠͷ FastAPI ษڧձ ʮFastAPI Ͱϋδϝϧ PythonʯͰֶΜͩ͜ͱ Λࢀߟʹɺࢼ͠ʹ API Λ࡞੒ͯ͠Έ·ͨ͠ͷͰ

   ൸࿐͠·͢ ʢษڧձ౰೔࢒ۀͰࢀՃͰ͖ͳ͔ͬͨͷͰɺࣗश͖ͯ͠·͠ ͨɻࢿྉͷڞ༗͋Γ͕ͱ͏͍͟͝·͢ʂʣ 3

4. ࿩͸มΘΓ·͕͢ɺ օ͞Μɺ Թઘ͸ ޷͖Ͱ͔͢ʁ 4

5. ࢁས͸Թઘ͕͍ͬͺ͍ʂ • ଟ༷ͳઘ࣭ ◦ “શ෦Ͱ10छྨ͋Δઘ࣭ͷ͏ͪɺࢁསʹ͸9छྨͷ ઘ࣭͕͋ΓɺશࠃͰ΋τοϓϨϕϧ” • ܠ؍ͷྑ͞ ◦ “ૣே΍༦฻Ε࣌ʹଠཅͷޫͰߚ͘છ·Δ෋࢜ࢁ΍ɺ

   ߕ෎ຍ஍ͷ༦฻Ε͔Β໷ܠʹҠΔॠؒͷඒ͍͠ܠ ৭ɺࣗવ๛͔ͳܢ୩ඒͳͲɺ༷ʑͳܠ৭ΛԹઘʹ ਁ͔Γͳ͕Βָ͠Ή͜ͱ͕Ͱ͖·͢” 5 ग़యɿ΍·ͳཱͪ͠دΓඦ໊౬ ؼলͷࡍʹΑཱͪ͘دͬͯ·͢

6. ࢁསͷԹઘࢪઃΛฦ٫͢ΔAPI Λ FastAPIͰ࡞ͬͯΈͨ 6

7. ࢁསݝͷΦʔϓϯσʔλΛར༻ 7

8. 8 PDF !!

9. ં֯ͳͷͰ.... PDF Λͦͷ··ϩʔυͯ͠ม׵ޙɺ FastAPI Ͱฦ٫͢ΔΑ͏࣮૷͠·ͨ͠ 9 Python ศརͩͳʙ

10. chezou/tabula-py • PDF ϑΝΠϧ಺ͷදΛ pandas ͷ DataFrame ΦϒδΣΫτʹ ม׵͢ΔϥΠϒϥϦ ◦

    CSVɺTSVɺJSON ϑΝΠϧʹม ׵͢Δ͜ͱ΋Մೳ • OCR πʔϧͰ͸ͳ͍ • Java 8 Ҏ͕߱ඞཁ 10

11. main.py - ᶃ PDF ಡΈࠐΈ def check_columns(df, previous_df): difference1 =

    set(df.keys()) - set(previous_df.keys()) difference2 = set(previous_df.keys()) - set(df.keys()) return (len(difference1) == 0 and len(difference2) == 0) 11 def get_data(pdf_path): previous_df = pd.DataFrame() dfs = tabula.read_pdf(pdf_path, lattice=True, pages = 'all') for df in dfs: # ෳ਺ϖʔδͷදΛ݁߹͢Δ if (check_columns(df, previous_df)): df = pd.concat([previous_df, df]) previous_df = df return previous_df PDFΛಡΈࠐΈɺDataFrame Φϒ δΣΫτΛฦ٫͢Δ ෳ਺ϖʔδʹ·͕ͨΔදͷ߲໨໊ Λൺֱ͠ɺಉ͡ද͔Ͳ͏͔Λ൑ఆ ͢Δʢ্ͷؔ਺͔Βݺ͹ΕΔʣ

12. main.py - ᶄ API ࡞੒ 12 app = FastAPI() pdf_path

    = "h3012011.pdf" @app.get("/") def read_root(): data = get_data(pdf_path) json_data = data.to_json(orient = 'records') return json.loads(json_data) @app.get("/area/{area}") def read_item(area: str): data = get_data(pdf_path) df_mask = data['市町村名'] == area data = data[df_mask] json_data = data.to_json(orient = 'records') return json.loads(json_data) [get] / શ݅ฦ٫͢Δ API [get] /area/{area} ࢦఆ͞ΕͨࢢொଜͷΈฦ٫͢Δ API

13. Docker ࢖͍·ͨ͠ 13 Docker Host (VPS) Nginx ϦόʔεϓϩΩγ onsen.yamanashi.dev:443 App

    Container FastAPI localhost:45280 main.py ࢁསݝ WebαΠτ PDF PDF tiangolo/uvicorn-gunicorn-fastapi :python3.8-alpine3.10 ্هͷΠϝʔδΛϕʔεʹ openjdk11 ΛΠϯετʔϧ ͨ͠΋ͷΛ࢖༻ ࠓճ͸ݝαΠτʹෛՙ͕͔͔Βͳ͍Α͏ɺ PDFΛࣄલʹίϯςφ಺ʹίϐʔ

14. DEMO 14 https://onsen.yamanashi.dev

15. ͍͞͝ʹ 15

16. ࡶײɾ·ͱΊ ʮFastAPI Ͱ࢝ΊΔ ΍·ͳ͠ ԹઘΊ͙Γʯ • FastAPI ͸Φʔϓϯσʔλ͔Βखܰʹ API Λ࡞੒͢Δͷʹྑͦ͞͏

    ◦ Tabula ͱ૊Έ߹ΘͤΔ͜ͱͰɺPDF ϑΝΠϧ΋ FastAPI ʹࡌͤΔ͜ͱ͕Մೳ ◦ PDFϑΝΠϧͷม׵ʹ͕͔͔͍࣌ؒͬͯΔͷͰɺதؒσʔλΛอଘ͢Δ౳ͷ ޻෉͕͍Δ͔΋ • ͓ؾʹೖΓͷԹઘࢪઃΛ౤ථ͢Δ API ͷ࡞੒΍ೝূ΋ࢼͯ͠Έ͍ͨ • ·ͩߦͬͨ͜ͱͷͳ͍ԹઘࢪઃΛ৭ʑ஌Εͯྑ͔ͬͨʂ 16

17. ʲิ଍ʳ࠷ۙ ͓ؾʹೖΓͷ೔ؼΓԹઘ ᶃΈ͔͞ͷ౬ Ԙα΢φͰ͓ഽεϕεϕʹʂ ᶄ೙࡚ѴԹઘ ମʹͼͬ͠Γ෇͘๐ͷ୸ࢎԹઘ ᶅ૿෋ͷ౬ ௿ԹͷݯઘͰ࣌ؒΏͬ͘Γਁ͔ΕΔ 17 ΦεεϝͷԹઘࢪઃ͕͋ͬͨΒ

    ੋඇڭ͍͑ͯͩ͘͞ʂ