FastAPI-WeChat applet upload pictures to the server

demand

The interface of WeChat applet to upload files to fastapi

Code

Frontend-WeChat Mini Program

Click upload-select a local album or take a photo

Note: url is an interface written by FastAPI, used to save files to the server (local here)

Important: pay attention to the naming of name: The function of this parameter is that the back-end can use this parameter to obtain the binary content of the picture, so this parameter should be consistent between the front and the back.

chooseImg: function () {
    
    
        wx.chooseImage({
    
    
            count: 1,
            sourceType: ['album', 'camera'],
            success(res) {
    
    
                const tempFilePaths = res.tempFilePaths;
                console.log(tempFilePaths[0]);
                wx.uploadFile({
    
    
                    filePath: tempFilePaths[0],
                    url: 'http://127.0.0.1:8000/customer/auth/photo/upload',
                    header: {
    
    
                        'content-type': 'multipart/form-data',
                        'token': wx.getStorageSync('token')
                    },
                    name: "file",
                    success(res) {
    
    
                        console.log(res.data)
                    }
                })
            }
        })
    },

Backend-FastAPI

python -m pip install python-multipart // 上传文件的依赖

from fastapi import APIRouter, Header, File, UploadFile

Accept the parameter file to be the same as the front-end definition

@router.post("/customer/auth/photo/upload")
async def upload(file: UploadFile = File(...)):  
    filename = file.filename
    temp = filename.split('.')
    if temp[len(temp)-1]  not in ["png", "jpg"]:    # 不是png，jpg
        return {
    
    "code": 203, "msg": "不支持的图片格式"}
    else:
        try:
            res = await file.read()
            with open(filename, "wb") as f:  # 文件会保存在跟服务器启动目录同一级
                f.write(res)
            return {
    
    "code": 200, "msg": "上传成功"}
        except Exception as e:
            return {
    
    "code": 201, "msg": "上传失败"}