How to implement file upload and processing in FastAPI
Jul 28, 2023 pm 03:01 PM
How to implement file uploading and processing in FastAPI
FastAPI is a modern, high-performance web framework that is easy to use and powerful. It provides native support for file uploading and processing. In this article, we will learn how to implement file upload and processing functions in the FastAPI framework, and provide code examples to illustrate specific implementation steps.
First, we need to import the required libraries and modules:
from fastapi import FastAPI, UploadFile, File from fastapi.responses import JSONResponse import shutil import os
Next, we need to create a FastAPI application instance:
app = FastAPI()
Now, we can define a route to Accept the file upload request and save the file to the server:
@app.post("/upload/")
async def create_upload_file(file: UploadFile = File(...)):
try:
# 保存文件到服務(wù)器上
with open(file.filename, "wb") as buffer:
shutil.copyfileobj(file.file, buffer)
# 返回成功的響應(yīng)
return JSONResponse({"message": "File uploaded successfully"})
except Exception as e:
# 返回失敗的響應(yīng)
return JSONResponse({"error": str(e)}, status_code=500)In the above code, we define a POST request route /upload/, which Receive a parameter named file, the type of the parameter is UploadFile, we use the File function to parse it as a file in the request body. File The first parameter of the function is the default value of the file type, ... means that this parameter must be passed, otherwise an error response will be returned.
When processing a file upload request, we first use with open to create a file writing stream, and then use the shutil.copyfileobj function to put the request body into The file object is copied to the server.
When the file is uploaded successfully, we return a JSON response containing a success message; if any exception occurs during the file upload, we will return a JSON response containing error information and set the response status code to 500.
After the file upload function has been implemented, we can continue to implement the file processing function. The following is an example route that accepts uploaded image files and converts the image files into thumbnails:
@app.post("/process_image/")
async def process_image(file: UploadFile = File(...)):
try:
# 保存文件到服務(wù)器上
with open(file.filename, "wb") as buffer:
shutil.copyfileobj(file.file, buffer)
# 進(jìn)行圖片處理，生成縮略圖
thumbnail_filename = f"thumbnail_{file.filename}"
# 模擬圖片處理過(guò)程
# 請(qǐng)根據(jù)實(shí)際需求進(jìn)行實(shí)現(xiàn)
# ...
# 返回縮略圖的下載鏈接
return JSONResponse({"thumbnail_url": f"/download/{thumbnail_filename}"})
except Exception as e:
# 返回失敗的響應(yīng)
return JSONResponse({"error": str(e)}, status_code=500)In the above example code, we used the same file upload process and then moved into image processing logic. Here, we use simulation to process image files, generate thumbnails, and return the thumbnail download link to the client.
Finally, we can also define a route to provide the download function:
@app.get("/download/{filename}")
async def download_file(filename: str):
try:
# 返回文件下載鏈接
return JSONResponse({"download_url": f"/file/{filename}"})
except Exception as e:
# 返回失敗的響應(yīng)
return JSONResponse({"error": str(e)}, status_code=500)In the above code, we define a GET request route/download /{filename}, this route accepts a file name parameter filename and returns the download link of the file.
At this point, we have implemented the function of file upload and processing in the FastAPI framework. Through the above sample code, we can understand the basic process of handling file upload and processing in FastAPI, and how to use FastAPID's API and methods to implement these functions. Of course, the specific file processing logic can be customized according to actual needs.
I hope this article will help you understand how to implement file upload and processing functions in FastAPI!
The above is the detailed content of How to implement file upload and processing in FastAPI. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undress AI Tool
Undress images for free
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
The operation process of WIN10 service host occupying too much CPU
Mar 27, 2024 pm 02:41 PM
1. First, we right-click the blank space of the taskbar and select the [Task Manager] option, or right-click the start logo, and then select the [Task Manager] option. 2. In the opened Task Manager interface, we click the [Services] tab on the far right. 3. In the opened [Service] tab, click the [Open Service] option below. 4. In the [Services] window that opens, right-click the [InternetConnectionSharing(ICS)] service, and then select the [Properties] option. 5. In the properties window that opens, change [Open with] to [Disabled], click [Apply] and then click [OK]. 6. Click the start logo, then click the shutdown button, select [Restart], and complete the computer restart.
Build international web applications using the FastAPI framework
Sep 29, 2023 pm 03:53 PM
Use the FastAPI framework to build international Web applications. FastAPI is a high-performance Python Web framework that combines Python type annotations and high-performance asynchronous support to make developing Web applications simpler, faster, and more reliable. When building an international Web application, FastAPI provides convenient tools and concepts that can make the application easily support multiple languages. Below I will give a specific code example to introduce how to use the FastAPI framework to build
Learn how to handle special characters and convert single quotes in PHP
Mar 27, 2024 pm 12:39 PM
In the process of PHP development, dealing with special characters is a common problem, especially in string processing, special characters are often escaped. Among them, converting special characters into single quotes is a relatively common requirement, because in PHP, single quotes are a common way to wrap strings. In this article, we will explain how to handle special character conversion single quotes in PHP and provide specific code examples. In PHP, special characters include but are not limited to single quotes ('), double quotes ("), backslash (), etc. In strings
A quick guide to CSV file manipulation
Dec 26, 2023 pm 02:23 PM
Quickly learn how to open and process CSV format files. With the continuous development of data analysis and processing, CSV format has become one of the widely used file formats. A CSV file is a simple and easy-to-read text file with different data fields separated by commas. Whether in academic research, business analysis or data processing, we often encounter situations where we need to open and process CSV files. The following guide will show you how to quickly learn to open and process CSV format files. Step 1: Understand the CSV file format First,
How to solve the problem after the upgrade from win7 to win10 fails?
Dec 26, 2023 pm 07:49 PM
If the operating system we use is win7, some friends may fail to upgrade from win7 to win10 when upgrading. The editor thinks we can try upgrading again to see if it can solve the problem. Let’s take a look at what the editor did for details~ What to do if win7 fails to upgrade to win10. Method 1: 1. It is recommended to download a driver first to evaluate whether your computer can be upgraded to Win10. 2. Then use the driver test after upgrading. Check if there are any driver abnormalities, and then fix them with one click. Method 2: 1. Delete all files under C:\Windows\SoftwareDistribution\Download. 2.win+R run "wuauclt.e
How to upload lyrics to QQ Music
Feb 23, 2024 pm 11:45 PM
With the advent of the digital age, music platforms have become one of the main ways for people to obtain music. However, sometimes when we listen to songs, we find that there are no lyrics, which is very disturbing. Many people hope that lyrics can be displayed when listening to songs to better understand the content and emotions of the songs. QQ Music, as one of the largest music platforms in China, also provides users with the function of uploading lyrics, so that users can better enjoy music and feel the connotation of the songs. The following will introduce how to upload lyrics on QQ Music. first
How to handle XML and JSON data formats in C# development
Oct 09, 2023 pm 06:15 PM
How to handle XML and JSON data formats in C# development requires specific code examples. In modern software development, XML and JSON are two widely used data formats. XML (Extensible Markup Language) is a markup language used to store and transmit data, while JSON (JavaScript Object Notation) is a lightweight data exchange format. In C# development, we often need to process and operate XML and JSON data. This article will focus on how to use C# to process these two data formats, and attach
Simple steps to upload your own music on Kugou
Mar 25, 2024 pm 10:56 PM
1. Open Kugou Music and click on your profile picture. 2. Click the settings icon in the upper right corner. 3. Click [Upload Music Works]. 4. Click [Upload Works]. 5. Select the song and click [Next]. 6. Finally, click [Upload].
