Python Requests POST请求异常：发送G.711μ-law音频至设备失败求助

我尝试用Python Requests给设备发送G.711μ-law格式音频，已经把文件转成u-law wav格式。照着设备API的示例（含HTTP/1.0单部分音频传输、gstreamer、curl调用示例）写了代码，请求头参数看起来都配置了，但一直收到错误('Connection aborted.', BadStatusLine('\r\n'))，设备只播放2秒蜂鸣声，不播目标音频。Windows环境开发，求排查原因。

设备API示例 #

Example 1: Single-part audio data transmit with G.711 μ-law (authorization omitted).
POST /bha-api/audio-transmit.cgi HTTP/1.0\r\n
Content Type: audio/basic\r\n
Content Length: 9999999\r\n
Connection: Keep Alive\r\n
Cache control: no-cache\r\n
\r\n
<AUDIODATA>
<AUDIODATA>
<AUDIODATA>
...
Example 2: Usage with gstreamer.
gst-launch-1.0 alsasrc ! queue ! audioconvert ! audio resample ! "audio/x-
raw,format=S16LE,rate=8000,channels=1" ! mulawenc ! "audio/x-
mulaw,rate=8000,channels=1" ! curlhttpsink
location=http://<device-ip>/bha-api/audio-transmit.cgi content-
type="audio/basic" use-content-length=true user=xxxxxx0001 passwd=xxxxxxxx

Example 3: Usage with curl.
curl -v --http1.0 -H "Content-Type: audio/basic" -H "Content-Length:
9999999" -H "Connection: Keep-Alive" -H "Cache-Control: no-cache" --data-
binary "@audio_file.ulaw" 'http://userxx0001:passwordxx@<device-ip>/bha-
api/audio-transmit.cgi' --limit-rate 8K

我的Python代码 #

filepath = Path(os.path.join(full_path, file))
print(filepath)

def patch_send():
  old_send = HTTPConnection.send
  def new_send(self, data):
      print(f'{"-"*9} BEGIN REQUEST {"-"*9}')
      print(data.decode('utf-8').strip())
      print(f'{"-"*10} END REQUEST {"-"*10}')
      return old_send(self, data)
      HTTPConnection.send = new_send

patch_send()

HTTPConnection._http_vsn = 10
HTTPConnection._http_vsn_str = 'HTTP/1.0'
HTTPConnection.debuglevel = 0
with open(filepath, mode='r', buffering=128 ) as file:
    fileobj = file.read()

response= requests.post(url= "http://192.168.178.9/bha-api/audio-transmit.cgi",
                    headers={"User-Agent": "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:47.0) Gecko/20100101 Firefox/47.0","Content-Type": "audio/basic; ","Connection": "keep-alive", "Cache-Control": "no-cache", "Content-Length": str(len(fileobj))},
                    auth= ('ghevxxxx', '7vfxxxxx'),
                    stream= True,
                    data = fileobj,
                    timeout=12
                )

请求打印信息 #

--------- BEGIN REQUEST ---------
POST /bha-api/audio-transmit.cgi HTTP/1.0
User-Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:47.0) Gecko/20100101 Firefox/47.0
Accept-Encoding: gzip, deflate
Accept: */*
Connection: keep-alive
Content-Type: audio/basic;
Cache-Control: no-cache
Content-Length: 55844
Authorization: Basic ZxxxxxxxxxxxRo
---------- END REQUEST ----------

问题排查与修复建议 #

核心问题点 #

• 文件读取方式错误：音频是二进制文件，用mode='r'文本模式读取会破坏二进制数据，导致设备无法识别，触发蜂鸣提示。必须用mode='rb'二进制模式读取。
• Content-Type头格式错误：请求头中Content-Type: audio/basic;多了一个分号，与API示例的标准格式不符，可能导致设备无法正确解析媒体类型。
• 缺少码率限制：curl示例中明确设置了--limit-rate 8K（G.711μ-law的标准码率是8kbps），未限速会导致数据发送过快，设备处理不及时断开连接。
• stream参数误用：stream=True用于大文件流式上传，但你已将整个文件读入内存，该参数会干扰发送逻辑，建议移除或直接传递文件对象。
• HTTP/1.0配置细节：直接修改HTTPConnection属性可能存在覆盖不全的情况，建议结合会话对象确保HTTP/1.0协议生效。

修正后的代码示例 #

import os
from pathlib import Path
import requests
from http.client import HTTPConnection

# 打印请求头（避免二进制音频乱码）
def patch_send():
    old_send = HTTPConnection.send
    def new_send(self, data):
        print(f'--------- BEGIN REQUEST ---------')
        if b'\r\n\r\n' in data:
            headers = data.split(b'\r\n\r\n')[0].decode('utf-8')
            print(headers.strip())
        print(f'---------- END REQUEST ----------')
        return old_send(self, data)
    HTTPConnection.send = new_send

patch_send()

# 强制使用HTTP/1.0协议
HTTPConnection._http_vsn = 10
HTTPConnection._http_vsn_str = 'HTTP/1.0'

filepath = Path(os.path.join(full_path, file))
print(filepath)

# 二进制模式打开文件，获取真实文件大小
file_size = os.path.getsize(filepath)
headers = {
    "User-Agent": "Mozilla/5.0 (Windows NT 6.1; Win64; x64; rv:47.0) Gecko/20100101 Firefox/47.0",
    "Content-Type": "audio/basic",
    "Connection": "keep-alive",
    "Cache-Control": "no-cache",
    "Content-Length": str(file_size)
}

# 创建会话并实现8KB/s限速（匹配G.711μ-law码率）
session = requests.Session()

try:
    with open(filepath, mode='rb') as file:
        response = session.post(
            url="http://192.168.178.9/bha-api/audio-transmit.cgi",
            headers=headers,
            auth=('ghevxxxx', '7vfxxxxx'),
            data=file,  # 直接传递文件对象，流式上传
            timeout=12,
            stream=False
        )
        response.raise_for_status()
        print("音频发送成功")
except requests.exceptions.RequestException as e:
    print(f"发送失败: {e}")

内容的提问来源于stack exchange，提问作者Bonze