服务器程序

import flask
import os

app = flask.Flask(__name__)


# 访问"http://127.0.0.1:5000/"，可以返回get和post传过来的数据
@app.route(‘/‘)  # 默认只接收get请求，@app.route(‘/‘,methods=["GET","POST"])或者只写"POST",同时接收两种请求
def index():
    try:
        # flask.request.args 存有get的参数，flask.request.form 存有post的参数
        # flask.request.values 既有get参数，也有post参数，通用。if 避免了数据不存在造成的出错
        province = flask.request.values.get("province") if "province" in flask.request.values else ""
        city = flask.request.values.get("city") if "city" in flask.request.values else ""
        note = flask.request.values.get("note") if "note" in flask.request.values else ""
        return f"{province},{city}\n{note}"
    except Exception as err:
        return str(err)


@app.route(‘/hi‘)  # 访问"http://127.0.0.1:5000/hi"可以返回index.html文件的网页
def hi():
    try:
        f = open("index.html", ‘rb‘)
        data = f.read()
        f.close()
        return data
    except Exception as err:
        return str(err)

# 访问"http://127.0.0.1:5000/image"，返回图像的名字，如果带上fileName参数访问，返回图像数据或者空值（不存在时）
@app.route(‘/image‘)
def image():
    if "fileName" not in flask.request.values:
        return "1.jpg"
    else:
        data = b""
        try:
            fileName = flask.request.values.get("fileName")
            if fileName != "" and os.path.exists(fileName):
                f = open(fileName, "rb")
                data = f.read()
                f.close()
        except Exception as err:
            data = str(err).encode()
        return data
        
# 上传文件
@app.route(‘/upload‘, methods=["POST"])
def uploadFile():
    msg = ""
    try:
        if "fileName" in flask.request.values: # get参数有fileName
            fileName = flask.request.values.get("fileName")
            file = flask.request.files["file"]  # 得到文件对象
            file.save("upload"+file.filename)
            msg = "ok"
        else:
            msg =‘没有按要求上传文件‘
    except Exception as err:
        print(err)
    return str(msg)


if __name__ == ‘__main__‘:
    app.run()

客户端程序

import requests
import os

province = "广东"
city = "深圳"
note = "大段文字......"
url = f"http://127.0.0.1:5000/?province={province}&city={city}" #get传送数据
data = {"note": note}   # post传送数据
resp = requests.post(url, data= data)
print(resp.content.decode())

# url = "http://127.0.0.1:5000/image"  #下载图片
# resp = requests.get(url)
# fileName = resp.content.decode()  # 得到图像的名字
# resp = requests.get(f"{url}?fileName={fileName}") # 图像名字作为数据
# with open("2.jpg", "wb") as f:
#     f.write(resp.content)

# url = "http://127.0.0.1:5000/upload"  # 上传文件
# uploadFileName = input("Enter the file:")
# if os.path.exists(uploadFileName):
#     with open(uploadFileName, ‘rb‘) as f:
#         dataB = f.read()
#     dataDict = {"file": (uploadFileName, dataB, "application/octet-stream")}
#     resp = requests.post(f"{url}?fileName={uploadFileName}", files=dataDict) # 文件上传是post
#     msg = resp.content.decode()
#     if msg == "ok":
#         print("成功上传：", len(dataB), "字节")
#     else:
#         print(msg)
# else:
#     print("文件不存在！")

html文件

Welcomd Python Flask Web

中文

原文：https://www.cnblogs.com/sunwenping/p/15306984.html