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I have a program which generates an image. Now I want to use Flask to make this picture accessible to other users, but I can’t display this image with the following code:
#!/usr/bin/python2
#coding: utf-8
from flask import *
app = Flask(__name__)
#app.run(host='0.0.0.0')
@app.route('/')
def index():
return render_template('hello.html')
if __name__ == '__main__':
app.run(debug=True,host='0.0.0.0')
My template hello.html is:
<!doctype html>
<title>Hello from Flask</title>
<h1>Hello World!</h1>
<img src="./weather-plot.png">
When I run this program and visit the page, I see this:
192.168.0.61 - - [10/Jul/2013 10:22:09] "GET / HTTP/1.1" 200 -
192.168.0.61 - - [10/Jul/2013 10:22:09] "GET /weather-plot.png HTTP/1.1" 200 -
And in my browser I see the title, but not the picture. What’s wrong?
By the way, is there a better method to display a picture without anything else? Maybe I don’t have to use a template?
789
To return image stored in database with Python Flask, we can use the make_response function. to call make_response on the image_binary image. Then we call response.
Are you sure the image is indeed in the location ./, i.e. in the root of your project?
In any case, it is better to use Flask's url_for() method to determine URLs (see http://flask.pocoo.org/docs/api/#flask.url_for) This makes sure that when you move things around, the URLs don't break.
129
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