Raspberry Pico W发送Pushbullet通知时遇adafruit_requests十进制整数语法错误

我用Raspberry Pico W开发了一款简易信箱开箱状态检测应用，通过Pushbullet发送通知。应用曾正常运行，但现在POST请求触发错误，GET请求可正常执行。

应用代码 #

import os
import adafruit_requests
import board
import digitalio
import time
import adafruit_debouncer
import wifi
import ssl
import ipaddress
import socketpool

quotes_url = "https://www.adafruit.com/api/quotes.php"

def connect_to_wifi():
    print("Connecting to WiFi")
    wifi.radio.connect(os.getenv('SSID'), os.getenv('PASSWORD'))
    print("Connected to WiFi")
    time.sleep(10)

def send_notification(title, message):
    api_key = os.getenv('PUSHBULLET_API_KEY')
    url = "https://api.pushbullet.com/v2/pushes"
    headers = {
        "Authorization": "Bearer " + api_key,
        "Content-Type": "application/json"
    }
    data = {
        "type": "note",
        "title": title,
        "body": message
    }
    print(headers)
    pool = socketpool.SocketPool(wifi.radio)

    requests = adafruit_requests.Session(pool, ssl.create_default_context())

    response = requests.get(quotes_url)
    print(response.content)
    response = requests.post(url, headers=headers, json=data)

    if response.status_code == 200:
        print("Notification sent successfully!")
    else:
        print("Failed to send notification.")

def blink_led():
    led = digitalio.DigitalInOut(board.LED)
    led.direction = digitalio.Direction.OUTPUT

    switch_pin = digitalio.DigitalInOut(board.GP21)
    switch_pin.direction = digitalio.Direction.INPUT
    switch_pin.pull = digitalio.Pull.UP

    switch_db = adafruit_debouncer.Debouncer(switch_pin)
    last_switch_state = False

    BLINK_ON_DURATION = 1000000000  # 1 second in nanoseconds
    BLINK_OFF_DURATION = 1000000000  # 1 second in nanoseconds
    LAST_BLINK_TIME = -1

    while True:
        switch_db.update()

        if switch_db.fell:
            LAST_BLINK_TIME = -1

        current_switch_state = switch_db.value

        if current_switch_state != last_switch_state:
            current_time = time.localtime()
            notification_time = "{}/{}/{} {}:{}:{}".format(current_time.tm_mday, current_time.tm_mon, current_time.tm_year,
                                              current_time.tm_hour, current_time.tm_min, current_time.tm_sec)
            #send_notification("Mailbox notification", notification_time + " - You (probably) got mail :)")
            send_notification("Mailbox notification", "You (probably) got mail :)")
            last_switch_state = current_switch_state

        now = time.monotonic_ns()
        if not current_switch_state and now >= LAST_BLINK_TIME + BLINK_OFF_DURATION:
            led.value = True
            LAST_BLINK_TIME = now
        if led.value and now >= LAST_BLINK_TIME + BLINK_ON_DURATION:
            led.value = False
            LAST_BLINK_TIME = now

        print("LED status:", led.value)
        print("Reed switch status:", current_switch_state)

        time.sleep(0.01)


connect_to_wifi()
blink_led()

错误日志 #

b'[{"text":"The most worth-while thing is to try to put happiness into the lives of others","author":"Robert Baden-Powell"}]'
Traceback (most recent call last):
  File "code.py", line 94, in <module>
  File "code.py", line 76, in blink_led
  File "code.py", line 41, in send_notification
  File "adafruit_requests.py", line 715, in post
  File "adafruit_requests.py", line 677, in request
  File "adafruit_requests.py", line 183, in __init__
ValueError: invalid syntax for integer with base 10

解决方案 #

这个错误是adafruit_requests库在解析HTTP响应头时，尝试将非整数字符串转换为整数导致的。结合你的情况，可按以下步骤排查修复：

• 验证Pushbullet API密钥：检查PUSHBULLET_API_KEY环境变量是否正确，确保没有多余空格、引号或换行符。可以直接替换代码中的os.getenv('PUSHBULLET_API_KEY')为实际密钥，临时测试是否是环境变量读取问题。

• 测试Pushbullet API可用性：用curl手动发送POST请求，确认API服务正常：

  curl -X POST https://api.pushbullet.com/v2/pushes \
    -H "Authorization: Bearer 你的API密钥" \
    -H "Content-Type: application/json" \
    -d '{"type": "note", "title": "测试通知", "body": "测试内容"}'
  

  如果请求失败，说明是API本身或密钥问题；如果成功，则问题出在代码或库的兼容性上。

• 复用Session对象：不要每次调用send_notification都创建新的Session，重复初始化可能引发异常。修改代码，将Session创建移到全局范围：

  # 在connect_to_wifi函数后添加全局Session初始化
  pool = None
  requests = None
  
  def connect_to_wifi():
      global pool, requests
      print("Connecting to WiFi")
      wifi.radio.connect(os.getenv('SSID'), os.getenv('PASSWORD'))
      print("Connected to WiFi")
      pool = socketpool.SocketPool(wifi.radio)
      requests = adafruit_requests.Session(pool, ssl.create_default_context())
      time.sleep(10)
  
  def send_notification(title, message):
      global requests
      api_key = os.getenv('PUSHBULLET_API_KEY')
      url = "https://api.pushbullet.com/v2/pushes"
      headers = {
          "Authorization": "Bearer " + api_key,
          "Content-Type": "application/json"
      }
      data = {
          "type": "note",
          "title": title,
          "body": message
      }
      print(headers)
      # 移除原有的pool和requests创建代码
      response = requests.post(url, headers=headers, json=data)
  
      if response.status_code == 200:
          print("Notification sent successfully!")
      else:
          print("Failed to send notification.")
  

• 检查adafruit_requests版本：如果是库版本兼容问题，尝试更新到最新稳定版，或者回退到之前能正常运行的版本。

• 添加错误捕获：在send_notification中捕获异常，打印更多细节，帮助定位问题：

  def send_notification(title, message):
      try:
          # 原函数内容
      except ValueError as e:
          print(f"ValueError详情: {e}")
          # 若能获取到响应对象，可打印响应头进一步排查
          if 'response' in locals():
              print(f"响应头: {response.headers}")
  

内容的提问来源于stack exchange，提问作者Pitto