Tipe respon apa sing bisa sampeyan bali saliyane JSON?

Question

IT Interview Practice · Accepted Answer

FastAPI bali JSON kanthi standar (nyerial dict, list, lan model Pydantic), nanging ndhukung akeh **tipe respon** liya kanggo kabutuhan béda-béda — HTML, file, stream, redirect, lan teks polos — liwat kelas `fastapi.responses`. ## Kelas respon standar lan umum ```python from fastapi.responses import ( JSONResponse, HTMLResponse, PlainTextResponse, RedirectResponse, FileResponse, StreamingResponse, ) @app.get("/json") def j(): return {"key": "value"} # default → JSON @app.get("/html", response_class=HTMLResponse) def h(): return "

Hello

" # serve HTML @app.get("/text", response_class=PlainTextResponse) def t(): return "plain text" @app.get("/go") def g(): return RedirectResponse(url="/new-location") # 307 redirect ``` ## Nyajekake file ```python @app.get("/download") def download(): return FileResponse( "report.pdf", media_type="application/pdf", filename="report.pdf", # prompts a download with this name ) ``` `FileResponse` nyajekake file saka disk kanthi efisien (nangani header, jinis konten) — kanggo download, gambar, dokumen sing digawa. ## Streaming data gedhe utawa sing digawa ```python @app.get("/stream") def stream(): def generate(): for i in range(1000000): yield f"line {i} " # yield chunks — NOT all loaded into memory return StreamingResponse(generate(), media_type="text/plain") ``` `StreamingResponse` ngirim data incrementally saka generator — perlu kanggo data **gedhe utawa terus-terusan digawa** (file gede, eksport CSV, live feed) supaya sampeyan ora muatake kabeh menyang memori sakabehing. (Uga dhasar Server-Sent Events.) ## Penyandi JSON khusus (JSON luwih cepet) ```python from fastapi.responses import ORJSONResponse app = FastAPI(default_response_class=ORJSONResponse) # use orjson for faster JSON serialization ``` ## Mengapa iki penting Jeneng JSON cover paling akeh respon API, aplikasi nyata asring kudu bali konten liya — lan ngerti tipe respon FastAPI ngobonake sampeyan tangani iki bener. **`FileResponse`** perlu kanggo nyajekake file lan download (laporan, gambar, dokumen sing digawa), **`StreamingResponse`** penting kanggo pengiriman **hemat memori** data gedhe utawa terus-terusan digawa (ekspor gede, streaming file, server-sent events — ngasilake potongan tinimbang bufering kabeh menyang memori, sing penting kanggo skalabilitas), lan `HTMLResponse`/`PlainTextResponse`/`RedirectResponse` nangani konten non-JSON lan navigasi. Ngerti tipe respon sing ana lan khususé nalika **stream** (kanggo data gedhe, kanggo nglirwake kelelahan memori) lawan bali JSON minangka pengetahuan praktis kanggo mbangun API sing luput saka endpoint JSON nglangi — nyakup download file, ekspor data, lan respon gedhe utawa real-time sing prasyarat umum ing aplikasi real-world.

Kelas respon standar lan umum

Nyajekake file

Streaming data gedhe utawa sing digawa

Penyandi JSON khusus (JSON luwih cepet)

Mengapa iki penting

Pitakon sing gegandhengan