您必须将图像数据编码为 base64 并将其添加到 dom 中的图像元素中。
我在 repl.it 中创建了一个示例应用程序:https://repl.it/@MichaelAnckaert/Flask-Playground https://repl.it/@MichaelAnckaert/Flask-Playground
这是一个 Flask 应用程序示例:
from flask import Flask, render_template, make_response
import base64
app = Flask('app')
@app.route('/')
def hello_world():
return render_template('image.html')
@app.route('/capture')
def capture_api():
with open("house-thumbs-up.gif", "rb") as f:
image_binary = f.read()
response = make_response(base64.b64encode(image_binary))
response.headers.set('Content-Type', 'image/gif')
response.headers.set('Content-Disposition', 'attachment', filename='image.gif')
return response
app.run(host='0.0.0.0', port=8080)
以及对应的HTML模板:
<img id="image">
<button class="button" id="start">Start</button>
<script src="https://code.jquery.com/jquery-3.5.1.min.js" integrity="sha256-9/aliU8dGd2tb6OSsuzixeV4y/faTqgFtohetphbbj0=" crossorigin="anonymous"></script>
<script>
let button = document.getElementById("start")
button.addEventListener('click', () => {
$.ajax({
url: 'https://luminoustwincase--five-nine.repl.co/capture',
type: 'GET',
contentType: "image/jpg",
success: function(result) {
document.getElementById('image').src = 'data:image/gif;base64,' + result;
}
});
});
</script>