Python发送HTTP SOAP请求获取AXIS相机VAPIX事件列表遇400错误求助

我正尝试通过VAPIX API获取AXIS相机的事件列表，用以下Python代码发送HTTP SOAP请求，但收到400响应。我只替换了代码里的IP、用户名和密码。

参考AXIS官方VAPIX文档中关于获取事件列表的内容。

from requests.auth import HTTPDigestAuth
import requests
url = "http://IP/vapix/services"

headers = {"Content-Type" : "application/soap+xml; action=//www.axis.com/vapix/ws/event1/GetEventInstances; Charset=UTF-8"}

body = """<SOAP-ENV:Envelope xmlns:SOAP-ENV="//www.w3.org/2003/05/soap-envelope" xmlns:SOAP-ENC="//www.w3.org/2003/05/soap-encoding" xmlns:xsi="//www.w3.org/2001/XMLSchema-instance" xmlns:xsd="//www.w3.org/2001/XMLSchema"><SOAP-ENV:Body><m:GetEventInstances xmlns:m="//www.axis.com/vapix/ws/event1"/></SOAP-ENV:Body></SOAP-ENV:Envelope>"""

response = requests.post(url, auth=HTTPDigestAuth('username', 'password'), data = body, headers = headers)

print(response)

1. SOAP命名空间格式错误 #

你的XML和请求头里的命名空间用了//开头，正确格式应该是http://前缀。比如：

• 请求头的action值应为http://www.axis.com/vapix/ws/event1/GetEventInstances
• XML中所有命名空间（如xmlns:SOAP-ENV、xmlns:m等）都要补全http://前缀

2. Content-Type头格式不规范 #

action参数需要用双引号包裹，且Charset应改为小写的charset。正确的Content-Type头写法：

"application/soap+xml; charset=UTF-8; action=\"http://www.axis.com/vapix/ws/event1/GetEventInstances\""

3. 服务路径可能有误 #

部分AXIS相机的VAPIX服务路径是/axis/services而非/vapix/services，可以尝试修改URL路径。

修复后的示例代码 #

from requests.auth import HTTPDigestAuth
import requests

url = "http://IP/axis/services"  # 修正服务路径

headers = {
    "Content-Type": 'application/soap+xml; charset=UTF-8; action="http://www.axis.com/vapix/ws/event1/GetEventInstances"'
}

body = """<SOAP-ENV:Envelope 
    xmlns:SOAP-ENV="http://www.w3.org/2003/05/soap-envelope" 
    xmlns:SOAP-ENC="http://www.w3.org/2003/05/soap-encoding" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xmlns:xsd="http://www.w3.org/2001/XMLSchema">
    <SOAP-ENV:Body>
        <m:GetEventInstances xmlns:m="http://www.axis.com/vapix/ws/event1"/>
    </SOAP-ENV:Body>
</SOAP-ENV:Envelope>"""

response = requests.post(url, auth=HTTPDigestAuth('username', 'password'), data=body, headers=headers)

print(response.status_code)
print(response.text)  # 打印响应文本，查看具体错误信息

额外排查建议 #

• 打印response.text，AXIS相机通常会在400响应中返回具体错误描述，帮助定位问题
• 确认相机的VAPIX API已启用，且所用账号具备访问事件服务的权限

内容的提问来源于stack exchange，提问作者Grant Eichenberger