从SimpleHTTPServer中读取JSON Post数据

Question

从SimpleHTTPServer中读取JSON Post数据

pythonajaxrestsimplejsonsimplehttpserver

45

我正在尝试使用Python SimpleHTTPServer构建一个简单的REST服务器。我在读取POST消息中遇到了问题，请告诉我是否正确操作。

from SimpleHTTPServer import SimpleHTTPRequestHandler
import SocketServer
import simplejson

class S(SimpleHTTPRequestHandler):
    def _set_headers(self):
        self.send_response(200)
        self.send_header('Content-type', 'text/html')
        self.end_headers()

    def do_GET(self):
        print "got get request %s" % (self.path)
        if self.path == '/':
          self.path = '/index.html'
          return SimpleHTTPRequestHandler.do_GET(self)

    def do_POST(self):
        print "got post!!"
        content_len = int(self.headers.getheader('content-length', 0))
        post_body = self.rfile.read(content_len)
        test_data = simplejson.loads(post_body)
        print "post_body(%s)" % (test_data)
        return SimpleHTTPRequestHandler.do_POST(self)

def run(handler_class=S, port=80):
    httpd = SocketServer.TCPServer(("", port), handler_class)
    print 'Starting httpd...'
    httpd.serve_forever()

index.html文件

<html>
<title>JSON TEST PAGE</title>
<head>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script type="text/javascript">

JSONTest = function() {

var resultDiv = $("#resultDivContainer");

$.ajax({
    url: "http://128.107.138.51:8080",
    type: "POST",
    data: {txt1: $("#json_text").val()},
    dataType: "json",
    success: function (result) {
        switch (result) {
            case true:
                processResponse(result);
                break;
            default:
                resultDiv.html(result);
        }
    },
    error: function (xhr, ajaxOptions, thrownError) {
    alert(xhr.status);
    alert(thrownError);
    }
});
};

</script>
</head>
<body>

<h1>My Web Page</h1>
<div id="resultDivContainer"></div>
<form>
<textarea name="json_text" id="json_text" rows="50" cols="80">
[{"resources": {"dut": "any_ts", "endpoint1": "endpoint", "endpoint2": "endpoint"}},
{"action": "create_conference", "serverName": "dut", "confName": "GURU_TEST"}]
</textarea>
<button type="button" onclick="JSONTest()">Generate Test</button>
</form>
</body>
</html>

SimpleJson无法从POST消息中加载json。我对Web编码不熟悉，甚至不确定我所做的是否正确来创建一个简单的REST API服务器。感谢您的帮助。

- Guru Govindan

1

请告诉我这是否是正确的方法，如果必须使用Django，请让我知道。 - Gatothgaj

在Python 3中，getheaders在self.headers上未实现。请改用self.headers['Content-Length']。如果标头不存在，则返回None。 - Paebbels

2个回答

13

SimpleHTTPRequestHandler不支持POST，很简单。可以看看Klein，它的服务器功能更加齐全。

这里有一个json PUT的例子（与POST非常接近）：https://pypi.python.org/pypi/klein/0.2.3

import json

from klein import Klein


class ItemStore(object):
    app = Klein()

    def __init__(self):
        self._items = {}

    @app.route('/')
    def items(self, request):
        request.setHeader('Content-Type', 'application/json')
        return json.dumps(self._items)

    @app.route('/<string:name>', methods=['PUT'])
    def save_item(self, request, name):
        request.setHeader('Content-Type', 'application/json')
        body = json.loads(request.content.read())
        self._items[name] = body
        return json.dumps({'success': True})

    @app.route('/<string:name>', methods=['GET'])
    def get_item(self, request, name):
        request.setHeader('Content-Type', 'application/json')
        return json.dumps(self._items.get(name))


if __name__ == '__main__':
    store = ItemStore()
    store.app.run('localhost', 8080)

- matthewatabet

谢谢提供链接。我也发现可以使用BaseHTTPHandler完成这个任务。 - Gatothgaj

BaseHTTPRequestHandler已经实现了这个功能，因此没有必要使用完全不同的包，可以继续使用内置模块来完成。 - Mike 'Pomax' Kamermans

网页内容由stack overflow 提供, 点击上面的

可以查看英文原文，
原文链接

- Guru Govindan · Accepted Answer

感谢matthewatabet提供的klein想法。我找到了一种使用BaseHTTPHandler实现它的方法。以下是代码。

from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer
import SocketServer
import simplejson
import random

class S(BaseHTTPRequestHandler):
    def _set_headers(self):
        self.send_response(200)
        self.send_header('Content-type', 'text/html')
        self.end_headers()

    def do_GET(self):
        self._set_headers()
        f = open("index.html", "r")
        self.wfile.write(f.read())

    def do_HEAD(self):
        self._set_headers()

    def do_POST(self):
        self._set_headers()
        print "in post method"
        self.data_string = self.rfile.read(int(self.headers['Content-Length']))

        self.send_response(200)
        self.end_headers()

        data = simplejson.loads(self.data_string)
        with open("test123456.json", "w") as outfile:
            simplejson.dump(data, outfile)
        print "{}".format(data)
        f = open("for_presen.py")
        self.wfile.write(f.read())
        return


def run(server_class=HTTPServer, handler_class=S, port=80):
    server_address = ('', port)
    httpd = server_class(server_address, handler_class)
    print 'Starting httpd...'
    httpd.serve_forever()

if __name__ == "__main__":
    from sys import argv

if len(argv) == 2:
    run(port=int(argv[1]))
else:
    run()

以及对应的HTML页面

<form action="/profile/index/sendmessage" method="post" enctype="application/x-www-form-urlencoded">
<div class="upload_form">
    <dt id="message-label"><label class="optional" for="message">Enter Message</label></dt>
    <dd id="message-element">
    <textarea cols="80" rows="50" id="message" name="message">
[{"resources": {"dut": "any_ts", "endpoint1": "multistream_endpoint", "endpoint2": "multistream_endpoint"}},

{"action": "create_conference", "serverName": "dut", "conferenceName": "GURU_SLAVE_TS"},

{"action": "dial_out_ep", "serverName": "dut", "confName": "GURU_SLAVE_TS", "epName": "endpoint1"}
]
        </textarea></dd>
    <dt id="id-label">&nbsp;</dt>
    <dd id="id-element">
    <input type="hidden" id="id" value="145198" name="id"></dd>
    <dt id="send_message-label">&nbsp;</dt>
    <dd id="send_message-element">
    <input type="submit" class="sendamessage" value="Send" id="send_message" name="send_message"></dd>
</div>
</form>

<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script type="text/javascript">
$("input.sendamessage").click(function(event) {
event.preventDefault();

var message = $('textarea#message').val();
var id      = $('input#id').val();
url = "http://128.107.138.51:8080"

var posting = $.post(url, message)

posting.done(function( data ) {
  alert(message);
});
});


</script>