使用“return redirect(url_for...)”时烧瓶“错误：[Errno 32] Broken pipe”答案

【问题标题】：flask "error: [Errno 32] Broken pipe" when using "return redirect(url_for...)"使用“return redirect(url_for...)”时烧瓶“错误：[Errno 32] Broken pipe”
【发布时间】：2015-09-02 16:47:21
【问题描述】：

我是 Jquery 的新手，正在尝试轮询服务器 API 以了解变量状态的变化。一切正常，除了当我使用“return redirect(url_for...)”作为返回类型时得到一个“损坏的管道”。

我是不是走错了路？我只想在变量发生变化时触发主视图，因为计算该视图的对象很昂贵，并且如果状态相同则不需要。

Python 代码：

@app.route('/status')
def check_deployment_status():

    # get all the simpleDB domains
    # the list of clusters are used to build the left nav
    clusters = sdb_conn.get_domain('clusters')

    cluster_id = request.args.get('id', '')
    state = request.args.get('state', '')

    # get that cluster from the list of clusters
    cluster=clusters.get_item(cluster_id)

    print "cluster state: " + cluster['state']
    print "dashboard state: " + state

    if cluster['state'] != state:
        return redirect(url_for('cluster', id=cluster_id))
    else:
        return 'this'

jquery 代码：

$(document).ready(function() {
    (function poll() {
        setTimeout(function() {
        $.ajax({
            url: "/status",
            type: "GET",
            success: function(data) {
               console.log("polling");
            },
            dataType: "json",
            data: {"id": $('#id').text(), "state": $('#state').text()},
            complete: poll,
            timeout: 2000
        })
        }, 5000);
    })();
});

错误，忘记发布错误：

Exception happened during processing of request from ('127.0.0.1', 56862)
Traceback (most recent call last):
  File "/usr/lib/python2.7/SocketServer.py", line 295, in _handle_request_noblock
self.process_request(request, client_address)
  File "/usr/lib/python2.7/SocketServer.py", line 321, in process_request
self.finish_request(request, client_address)
  File "/usr/lib/python2.7/SocketServer.py", line 334, in finish_request
self.RequestHandlerClass(request, client_address, self)
  File "/usr/lib/python2.7/SocketServer.py", line 651, in __init__
self.finish()
  File "/usr/lib/python2.7/SocketServer.py", line 710, in finish
self.wfile.close()
  File "/usr/lib/python2.7/socket.py", line 279, in close
self.flush()
  File "/usr/lib/python2.7/socket.py", line 303, in flush
self._sock.sendall(view[write_offset:write_offset+buffer_size])
error: [Errno 32] Broken pipe

【问题讨论】：

标签： jquery python flask

【解决方案1】：

是的，我想错了（我想）。最后，我制作了一个 URL 并将其作为 jquery 响应传回，并在 javascript 中处理重定向。新的 jquery 函数如下所示：

$(document).ready(function() {
(function poll() {
    setTimeout(function() {
    $.ajax({
        url: "/status",
        type: "GET",
        success: function(data) {
        if (data.redirect) {
            // data.redirect contains the string URL to redirect to
            window.location.href = data.redirect;
        }
            console.log(data.redirect);
        },
        dataType: "json",
        data: {"id": $('#id').text(), "state": $('#state').text()},
        complete: poll,
        timeout: 2000
    })
    }, 5000);
})();
});

而python是这样的：

@app.route('/status')
def check_deployment_status():

    # get all the simpleDB domains
    # the list of clusters are used to build the left nav
    clusters = sdb_conn.get_domain('clusters')

    cluster_id = request.args.get('id', '')
    state = request.args.get('state', '')

    # get that cluster from the list of clusters
    cluster=clusters.get_item(cluster_id)

    print "cluster state: " + cluster['state']
    print "dashboard state: " + state

    if cluster['state'] != state:
        #return redirect(url_for('cluster', id=cluster_id))
        return jsonify(redirect=url_for('cluster', id=cluster_id))
    else:
        return 'this'

【讨论】：