好的,我认为我现在可以回答自己的问题了。这里是一个计算服务器上一个数字平方的示例实现。如果有任何改进或误解,请告诉我。
Python 服务器文件:
import threading
import webbrowser
import BaseHTTPServer
import SimpleHTTPServer
FILE = 'frontend.html'
PORT = 8080
class TestHandler(SimpleHTTPServer.SimpleHTTPRequestHandler):
"""The test example handler."""
def do_POST(self):
"""Handle a post request by returning the square of the number."""
length = int(self.headers.getheader('content-length'))
data_string = self.rfile.read(length)
try:
result = int(data_string) ** 2
except:
result = 'error'
self.wfile.write(result)
def open_browser():
"""Start a browser after waiting for half a second."""
def _open_browser():
webbrowser.open('http://localhost:%s/%s' % (PORT, FILE))
thread = threading.Timer(0.5, _open_browser)
thread.start()
def start_server():
"""Start the server."""
server_address = ("", PORT)
server = BaseHTTPServer.HTTPServer(server_address, TestHandler)
server.serve_forever()
if __name__ == "__main__":
open_browser()
start_server()
...和HTML文件(我称之为“frontend.html”,不幸的是这个名称也必须出现在JavaScript代码中):
<html>
<head>
<title>AJAX test</title>
</head>
<body>
<script type="text/javascript">
function xml_http_post(url, data, callback) {
var req = false;
try {
req = new XMLHttpRequest();
}
catch (e) {
try {
req = new ActiveXObject("Msxml2.XMLHTTP");
}
catch (e) {
try {
req = new ActiveXObject("Microsoft.XMLHTTP");
}
catch (e) {
alert("Your browser does not support AJAX!");
return false;
}
}
}
req.open("POST", url, true);
req.onreadystatechange = function() {
if (req.readyState == 4) {
callback(req);
}
}
req.send(data);
}
function test_button() {
var data = document.test_form.test_text.value;
xml_http_post("frontend.html", data, test_handle)
}
function test_handle(req) {
var elem = document.getElementById('test_result')
elem.innerHTML = req.responseText
}
</script>
<form name=test_form>
sqr(
<input type="text" name="test_text" value="0" size="4">
) =
<span id="test_result">0</span>
<input type=button onClick="test_button();" value="start" title="start">
</form>
</body>
</html>
当然使用
jQuery来进行XML请求会更加方便,但出于简化的考虑,我将保留此方式。
最后,以下是使用WSGI的替代实现(不幸的是,如果请求不是POST,我没有找到可以回退到标准文件服务处理程序的方法):
import threading
import webbrowser
from wsgiref.simple_server import make_server
FILE = 'frontend.html'
PORT = 8080
def test_app(environ, start_response):
if environ['REQUEST_METHOD'] == 'POST':
try:
request_body_size = int(environ['CONTENT_LENGTH'])
request_body = environ['wsgi.input'].read(request_body_size)
except (TypeError, ValueError):
request_body = "0"
try:
response_body = str(int(request_body) ** 2)
except:
response_body = "error"
status = '200 OK'
headers = [('Content-type', 'text/plain')]
start_response(status, headers)
return [response_body]
else:
response_body = open(FILE).read()
status = '200 OK'
headers = [('Content-type', 'text/html'),
('Content-Length', str(len(response_body)))]
start_response(status, headers)
return [response_body]
def open_browser():
"""Start a browser after waiting for half a second."""
def _open_browser():
webbrowser.open('http://localhost:%s/%s' % (PORT, FILE))
thread = threading.Timer(0.5, _open_browser)
thread.start()
def start_server():
"""Start the server."""
httpd = make_server("", PORT, test_app)
httpd.serve_forever()
if __name__ == "__main__":
open_browser()
start_server()
net::ERR_INVALID_HTTP_RESPONSE
。在网上搜索,其他应用程序似乎也遇到了与此版本的Chrome类似的问题,特别是在非标准端口上。有什么想法吗? - SkyNTreq.responseText
为空,而result
不是。同样的问题已经发布在https://stackoverflow.com/q/40314747/11769765中。 - Friedrich -- Слава Україні