Flask 框架，項目是前后分離。 請求為fetch,后端post拿不到數(shù)據(jù)；
具體癥狀：

1. get可以獲取，post請求發(fā)出后請求被掛起，頁面沒有響應；
2. 只要后端代碼出現(xiàn)request.form就會出現(xiàn)被掛起
3. 搜索網(wǎng)上和segmentfault的寫法，均無效；
4. 請求是
        POST
        Formdata
            username: 'aaa'
            password: '11221212' 
            
               

后端代碼

@app.route('/blog/login', methods=['post'])
def login():
        try:
                print(334,request.method, request.form.get('username'))
        except:
                print(11111)
        return '123'

錯誤信息

Traceback (most recent call last):
  File "/Users/zhongwangsheng/Developer/PyProject/family/venv/lib/python2.7/site-packages/werkzeug/serving.py", line 270, in run_wsgi
    execute(self.server.app)
  File "/Users/zhongwangsheng/Developer/PyProject/family/venv/lib/python2.7/site-packages/werkzeug/serving.py", line 261, in execute
    write(data)
  File "/Users/zhongwangsheng/Developer/PyProject/family/venv/lib/python2.7/site-packages/werkzeug/serving.py", line 236, in write
    self.send_header('Server', self.version_string())
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/BaseHTTPServer.py", line 401, in send_header
    self.wfile.write("%s: %s\r\n" % (keyword, value))
IOError: [Errno 32] Broken pipe

以下為修改后的登錄代碼，還是一樣的錯誤“請求被掛起，沒反應，約1分鐘后失敗error”

@app.route('/blog/login', methods=['post'])
def login():
        try:
                print(111, request.data)
                print(222, request.form)
        except:
                print(333)
        return 1234

以下是用fetch發(fā)送的請求信息

Request URL:http://localhost:8084/blog/login
Referrer Policy:no-referrer-when-downgrade
Provisional headers are shown
Authorization:
Content-Type:application/x-www-form-urlencoded
Origin:http://localhost:8084
Referer:http://localhost:8084/
User-Agent:Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.186 Safari/537.36 OPR/51.0.2830.55 (Edition Baidu)

Form Data
    password:123456
    username:zws