1. 字符交互
1.1. 导入库函数
from flask import Flask, render_template
from flask import Flask, redirect, url_for, request
app = Flask(__name__)
1.2. 定义函数
@app.route('/des_name/<name>/')
def des_name(name):
return "%s"%name
@app.route('/')
def f():
return render_template('login.html')
@app.route('/',methods = ['POST', 'GET'])
def login():
if request.method == 'POST':
user = request.form['nm']
print(user)
return redirect(url_for('des_name',name=user))
else:
user = request.args.get('nm')
print(user)
return redirect(url_for('des_name',name=user))
1.3. 调用
if __name__ == '__main__':
app.run(debug = True)
2. 图片交互
2.1. 引入库函数
from flask import Flask
from flask import render_template, request
import base64
import os
2.2. 定义函数
def return_img_stream(img_local_path):
"""
工具函数:
获取本地图片流
:param img_local_path:文件单张图片的本地绝对路径
:return: 图片流
"""
import base64
img_stream = ''
with open(img_local_path, 'rb') as img_f:
img_stream = img_f.read()
img_stream = base64.b64encode(img_stream).decode()
return img_stream
# 获取项目当前绝对路径
# 比如我的项目在桌面上存放则得到——"C:\Users\asus\Desktop\shou"
basedir = "C:/Users/jimore/Documents/Tencent Files/3457822025/FileRecv/yolov5-master"
# 实例
app = Flask(__name__)
# 在根路由下返回上面的表单页面
@app.route('/', methods=['GET'])
def index():
return render_template("dd.html")
# 表单提交路径,需要指定接受方式
@app.route('/getImg/', methods=['GET', 'POST'])
def getImg():
# 通过表单中name值获取图片
imgData = request.files["image"]
# 设置图片要保存到的路径
path = basedir + "/static/upload/img/"
print(path)
# 获取图片名称及后缀名
imgName = imgData.filename
# 图片path和名称组成图片的保存路径
file_path = path + imgName
# 保存图片
imgData.save(file_path)
img_stream = return_img_stream(file_path)
return render_template('hh.html',
img_stream=img_stream)
2.3. 调用
app.run()