我正在尝试在ESP8266-01（1MB闪存）上设置一个简单的HTTP Web服务器，它具有最新的1.9.3 MicroPython固件 . 目的是能够为STA接口最终连接的家庭网络配置凭证 .
所以高级代码执行此操作：
-
打开AP界面
-
有人会连接到
192.168.0.1/index.html，它会有一个用户名和密码的表单 . 我们只需要输入admin / admin . 单击“提交”按钮应该对192.168.0.1/configure.html进行POST -
Configure.html是一个带有表单的网页，其中将输入SSID和密码 . 我希望您可以通过查看下面的代码来了解更多详细信息
我面临两个问题：
-
提交
index.html表单时收到的总字节数未完成 . 我绕过Referrer（太偏了），总共大约560个字节 . 这是我从移动浏览器做的时候 . 有趣的是，它总是得到那么多字节 . 如果这会有所帮助，我可以分享我得到的东西 . -
看门狗计时器有时会重新启动我的模块 . 我'm doing most of the suggested changes in my code - using small sleeps. Is there any way in MicroPython on ESP8266, through which I can '喂' the WDT so that it does not '超时'然后重新启动我的模块？
以下是我的代码：
import gc
import network
gc.collect()
import machine
gc.collect()
import ubinascii
gc.collect()
import ujson
gc.collect()
import uos
gc.collect()
import utime
gc.collect()
import socket
gc.collect()
import select
gc.collect()
html = """<!DOCTYPE html>
<html>
<head> <title>Ouroboros IoT Login</title> </head>
<body>
<form action="configure.html" method="POST">
Username : <input type="text" name="username"></br>
Password: <input type="password" name="password" ></br>
<input type="submit" value="submit" name="submit">
</form>
</body>
</html>
"""
login_fail_html = """<!DOCTYPE html>
<html>
<head> <title>Ouroboros IoT Login</title> </head>
<body>
<h2>Incorrect Credentials!</h2><br>Please login<br>
<form action="configure.html" method="POST">
Username : <input type="text" name="username"></br>
Password: <input type="password" name="password" ></br>
<input type="submit" value="submit" name="submit">
</form>
</body>
</html>
"""
# Check if file exists
def fileExists(fileName):
try:
uos.stat(fileName)
print("File " + fileName + " found!")
return True
except OSError:
print("No file " + fileName + " found!")
return False
# Turns WiFi ON for configuration
def turn_wifi_on():
# Setup the AP interface
ap_if = network.WLAN(network.AP_IF)
ap_if.active(False)
ap_if.active(True)
# Get the MACADDRESS - without any spaces
macaddress = ubinascii.hexlify(ap_if.config('mac'),'').decode()
ap_if.config(essid="OUB1_"+macaddress, password="12345678")
#ap_if.config(essid="OUB1_"+macaddress)
ap_if.ifconfig(('192.168.0.1', '255.255.255.0', '192.168.0.1', '192.168.0.1'))
# Configure the AP to static IPs
def turn_wifi_off():
ap_if = network.WLAN(network.AP_IF)
ap_if.active(False)
# Find out the stored IoT secret content
def get_iot_secret():
fileName = 'alpha.txt'
if fileExists(fileName):
f = open(fileName)
content_str = f.read()
f.close()
return content_str
else:
return 'asdasrefwefefergf9rerf3n4r23irn1n32f'
# Find out the stored home network credential if exist
def get_wifi_config():
fileName = 'wifi.conf'
if fileExists(fileName):
f = open(fileName)
content_str = f.read()
f.close()
content = ujson.loads(content_str)
return content
else:
return None
# Set the home network credentials
def save_wifi_config(essid, passphrase):
f = open('wifi.conf', 'w')
config = {'essid':essid, 'passphrase':passphrase}
config_str = ujson.dumps(config)
f.write(config_str)
f.close()
# Find out the stored login credentials
def get_login_config():
fileName = 'login.conf'
if fileExists(fileName):
f = open(fileName)
content_str = f.read()
f.close()
content = ujson.loads(content_str)
return content
else:
# No file exists so far, so use the admin/admin credentials
return {'user':'admin','password':'admin'}
# Set the login credentials
def save_login_config(user, password):
f = open('login.conf', 'w')
config = {'user':user, 'password':password}
config_str = ujson.dumps(config)
f.write(config_str)
f.close()
def turn_gpio_on(device_num):
# Device Num to Pin Mapping
if device_num == 0:
pin_num = 0
elif device_num == 1:
pin_num = 2
# Check Pin
pin = machine.Pin(pin_num)
if pin.value() == 0:
pin.on()
# else it is already at HIGH state, nothing to do
def turn_gpio_off(device_num):
# Device Num to Pin Mapping
if device_num == 0:
pin_num = 0
elif device_num == 1:
pin_num = 2
# Check Pin
pin = machine.Pin(pin_num)
if pin.value() == 1:
pin.off()
# else it is already at LOW state, nothing to do
def init_pin(device_num):
# Device Num to Pin Mapping
if device_num == 0:
pin_num = 0
elif device_num == 1:
pin_num = 2
#open GPIO0 in output mode & turn it off by default
pin = machine.Pin(pin_num, machine.Pin.OUT)
# Turn off both GPIO initially
turn_gpio_off(device_num)
# Find out the post parameters in a dictionary
def get_post_params(req):
print("Inside GET POST PARAMS : req = " + req)
post_params = req.split('\r\n')[-1:][0]
# Check if the post body contains the necessary fields
# Split the post_params by &
# params : ['username=', 'password=', 'method=POST', 'url=http%3A%2F%2Ftwig-me.com%2Fv1%2Fusergroups%2FWKMUYXELA9LCC', 'jsondata=', 'submit=submit']
print("post_params : " + post_params)
params = post_params.split('&')
print("Params")
print(params)
# Initialize the key value pair dict
post_dict = {}
# Iterate on each param
for param in params:
# Each param would be like 'method=POST', etc
key_val = param.split('=')
print("Key Val :")
print(key_val)
key = key_val[0]
val = key_val[1]
# Update post_dict
post_dict[key] = val
return post_dict
# This web server takes care of the WiFi configuration
# max_run_sec
def web_server(max_run_sec = None):
# Turn wifi interface ON
turn_wifi_on()
# Create server socket
addr = socket.getaddrinfo('0.0.0.0', 80)[0][-1]
s = socket.socket()
# TODO : If both the wifi and sta are operating simultaneously, then bind only to WiFi
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
s.bind(addr)
s.listen(1)
# s.settimeout(1)
poller = select.poll()
poller.register(s, select.POLLIN)
# Get the current time since epoch
startTimeEpoch = utime.time()
while True:
events = poller.poll(200) # time in milliseconds
if events:
try:
gc.collect()
res = s.accept()
client_s = res[0]
client_addr = res[1]
req = ''
#while True:
# data = client_s.recv(200)
# if data:
# req += str(data, 'utf8')
# else:
# break
# utime.sleep_ms(50)
req = client_s.recv(4096)
req = req.decode()
print(req)
req = str(req)
# Came here means that there has been some connection!
# Reset the start time epoch in such a case:
startTimeEpoch = utime.time()
# Check route now
if req.find('configure.html') != -1:
print("Got configure request!\r\n")
# Check if the username and password are correct, if not, configure:
login_config = get_login_config()
username = login_config['user']
pwd = login_config['password']
print("Username : " + username + ", pwd : " + pwd)
# Find the POST PARAMETERS sent
# There would be just one entry in the array, so get the 0th index directly
# post_params : 'username=&password=&method=POST&url=http%3A%2F%2Ftwig-me.com%2Fv1%2Fusergroups%2FWKMUYXELA9LCC&jsondata=&submit=submit'
print("Came here A")
post_dict = get_post_params(req)
# Now check if the post_dict has the key and value for username and password as needed?
username_post = post_dict['username']
password_post = post_dict['password']
print("Came here B")
# Check if the password is same as expected
if (username_post == username) and (password_post == pwd):
hidden_input = '<input type="hidden" name="username" value="' + username + '"><input type="hidden" name="passphrase" value="' + pwd + '">'
# Send the login username and password inside the hidden input field
configure_html = "<!DOCTYPE html><html><head> <title>Ouroboros IoT WiFi Configuration Page</title> </head><body><form action=\"configure_wifi.html\" method=\"POST\">WiFi SSID : <input type=\"text\" name=\"essid\"></br>WiFi Password: <input type=\"password\" name=\"passphrase\" ></br>" + hidden_input + "<input type=\"submit\" value=\"submit\" name=\"submit\"></form></body></html>"
# TODO : Also show link to webpage, where from we can change the login credentials
client_s.send(configure_html)
else:
client_s.send(login_fail_html)
elif req.find('configure_wifi.html') != -1:
# Check if the username and password are correct, if not, configure:
login_config = get_login_config()
username = login_config['user']
pwd = login_config['password']
# Get post parameters
post_dict = get_post_params(req)
# Now check if the post_dict has the key and value for username and password as needed?
username_post = post_dict['username']
password_post = post_dict['password']
# Check if the password is same as expected
if (username_post == username) and (password_post == pwd):
# Do some sanity check for handling the new wifi ssid and password
new_wifi_ssid = post_dict['essid']
new_wifi_passphrase = post_dict['passphrase']
# Set the wifi credentials
save_wifi_config(new_wifi_ssid, new_wifi_passphrase)
client_s.send('<!DOCTYPE html><html><head> <title>Ouroboros IoT WiFi Configuration Success</title> </head><body>Configuration successful!<br>Device would go into reboot now!</body></html>')
# Reboot device now
machine.reset()
else:
client_s.send(login_fail_html)
elif req.find('index.html') != -1:
print("Got index.html request!\r\n")
client_s.send(html)
else :
# Do nothing
print("Invalid request received! Show the login page again!\r\n")
client_s.send(html)
client_s.close()
machine.idle()
except OSError:
# Got no request and it timedout!
print("Timed-out, no request received!\r\n")
except Exception as e:
print("Got some exception\r\n")
print(str(e))
finally:
if max_run_sec is not None:
elapsedTime = utime.time() - startTimeEpoch
if elapsedTime > max_run_sec:
# Max run time of web server has elapsed, time to exit this mode!
break
utime.sleep_ms()
machine.idle()
# When while loop ends!
s.close()
# Turn wifi interface OFF
turn_wifi_off()
# Starts a thread which runs the web server to handle WiFi
def start_web_server(max_run_sec = None):
# start_new_thread(web_server, (max_run_sec))
web_server(max_run_sec)
############# MAIN ##########################
# Initialize two pins to INPUT and OFF by default
init_pin(0)
init_pin(1)
#turn_wifi_off()
# Check if the home wifi network has been setup
# Check if home wifi config is valid, if so, connect to it
# If home wifi is not configured, then use the Web server all the time.
if get_wifi_config() is None:
# Came here means the wifi is not configured
# Start the web server
print("Starting web server")
start_web_server()
编辑1：
我能够设置WDT并提供它 . 所以没有更多的WDT重启 . 但是，POST问题仍然存在：
仅供参考，以下是回复：
POST /configure.html HTTP/1.1
Host: 192.168.0.1
Connection: keep-alive
Content-Length: 43
Cache-Control: max-age=0
Origin: http://192.168.0.1
Upgrade-Insecure-Requests: 1
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 (Linux; Android 5.1.1; Redmi Note 3 Build/LMY47V) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.123 Mobile Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
Referer: http://192.168.0.1/index.html
Accept-Encoding: g
可以看出，接收的数据包是部分的，Content-Length头部表示43字节的有效负载 . 但它没有收到 . 使用“nc”并在本地运行服务器时，收到的数据包如下：
POST /configure.html HTTP/1.1
Host: 192.168.0.1
Connection: keep-alive
Content-Length: 43
Cache-Control: max-age=0
Upgrade-Insecure-Requests: 1
Origin: null
Content-Type: application/x-www-form-urlencoded
User-Agent: Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/65.0.3325.181 Chrome/65.0.3325.181 Safari/537.36
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8
Accept-Encoding: gzip, deflate, br
Accept-Language: en-GB,en-US;q=0.9,en;q=0.8
username=admin&password=admin&submit=submit
这里，可以很容易地看到43字节长度的有效载荷 .
所以我的问题是，对于ESP8266来说，几乎800字节的有效载荷是不是太大了？有什么办法可以删除浏览器发送的不必要的 Headers 吗？任何方式获得所有数据，如果其碎片？