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You're creating a web app that handles text input, converts it to speech, and returns an audio file for download. You need a download option on the HTML page, but you can't implement it properly.
In Flask, a similar setup could be achieved using the send_file function. How do you replicate this functionality with FastAPI?
<code class="python">from fastapi import FastAPI, File, Form, UploadFile from fastapi.responses import FileResponse, HTMLResponse from fastapi.templating import Jinja2Templates from gtts import gTTS templates = Jinja2Templates(directory="templates") def text_to_speech(language: str, text: str) -> str: tts = gTTS(text=text, lang=language, slow=False) tts.save("./temp/welcome.mp3") return "Text to speech conversion successful" @app.get("/") def home(request: Request): return templates.TemplateResponse("index.html", {"request": request}) @app.post("/text2speech") async def home(request: Request): if request.method == "POST": form = await request.form() if form["message"] and form["language"]: language = form["language"] text = form["message"] translate = text_to_speech(language, text) path = "./temp/welcome.mp3" value = FileResponse("./temp/welcome.mp3", media_type="audio/mp3") return value</code>
<code class="html"><!doctype html> <title>Download MP3 File</title> <h2>Download a file</h2> <p><a href="{{ url_for('text2speech') }}">Download</a></p></code>
Option 1: Use the Form keyword to ensure required parameters. Instead of using await request.form() and manually checking for required parameters, use Form(...) to make parameters mandatory. After processing the received data, use FileResponse to return the file, setting the Content-Disposition header to 'attachment.'
Option 2: You can also support both GET and POST requests for the /text2speech endpoint by using decorators like @app.api_route("/text2speech", methods=["GET", "POST"]). Alternatively, you can define separate endpoints with @app.get("/text2speech") and @app.post("/text2speech").
Additionally, you can optionally set up a JavaScript interface using Fetch API to download the file in the frontend.
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