Scenario requirements:You need to find a picture in the local flash server and return it to the front end for display.
Questions:Usually, the front-end < img > tag will only accept the form of URL to display the image, and never try to return a local image of the server to the front-end.
So write a record of this scene that seems a little strange. (usually, personal blogs, personal websites have no money, and third-party services will be stored locally on the server.)
Project directory:
dyy_project
|
|—-Static (created automatically when creating a new flash project, without any files)
|—-templates
|—– index.html (front page)
|—-dyy_ project.py (flash project startup file)
File content: dyy_ project.py
#!/usr/bin/env python
# coding=utf-8
from flask import Flask
from flask import render_template
app = Flask(__name__)
"""
This is an example of how flash reads the local image of the server and returns the image stream to the front-end display
"""
def return_img_stream(img_local_path):
"""
Tool function:
Get local image stream
:param img_ local_ Path: the local absolute path of a single image in a file
: Return: image stream
"""
import base64
img_stream = ''
with open(img_local_path, 'r') as img_f:
img_stream = img_f.read()
img_stream = base64.b64encode(img_stream)
return img_stream
@app.route('/')
def hello_world():
img_path = '/home/hogan/Googlelogo.png'
img_stream = return_img_stream(img_path)
return render_template('index.html',
img_stream=img_stream)
if __name__ == '__main__':
app.run(debug=True, port=8080)Contents of the document: index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Flask Show Image</title>
</head>
<body>
<img style="width:180px" src="data:;base64,{{ img_stream }}">
</body>
</html>be careful:The Src in the IMG tag must follow the data:; base64,{{img_ Stream}, otherwise the image will not be displayed.
Then start your flag program and visit http://127.0.0.1 You can see your picture.
The above Python implementation of flash returns the image stream to the front-end display, which is the whole content shared by Xiaobian. I hope it can give you a reference, and I hope you can support developer more.