如何通过HTTPS将事件发送到Azure IoT Hub

Question

我在Azure上设置了一个IoT中心，并创建了一个名为“ServerTemp”的设备。我生成了一个SAS令牌，它似乎被接受了（我没有得到401）。但是我得到了一个400 Bad Request。

以下是我通过curl发送的请求：

curl -v -H"Authorization:SharedAccessSignature sr=A794683.azure-devices.net&sig=<snip>" -H"Content-Type:application/json" -d'{"deviceId":"ServerTemp","temperature":70}' https://A479683.azure-devices.net/devices/ServerTemp/messages/events?api-version=2016-11-14

请求和响应（curl的输出）：

> POST /devices/ServerTemp/messages/events?api-version=2016-11-14 HTTP/1.1
> Host: A479683.azure-devices.net
> User-Agent: curl/7.47.0
> Accept: */*
> Authorization:SharedAccessSignature sr=A794683.azure-devices.net&sig=<snip>
> Content-Type:application/json
> Content-Length: 42
>
* upload completely sent off: 42 out of 42 bytes
< HTTP/1.1 400 Bad Request
< Content-Length: 151
< Content-Type: application/json; charset=utf-8
< Server: Microsoft-HTTPAPI/2.0
< iothub-errorcode: ArgumentInvalid
< Date: Sun, 15 Apr 2018 22:21:50 GMT
<
* Connection #0 to host A479683.azure-devices.net left intact
{"Message":"ErrorCode:ArgumentInvalid;BadRequest","ExceptionMessage":"Tracking ID:963189cb515345e69f94300655d3ca23-G:10-TimeStamp:04/15/2018 22:21:50"}

我做错了什么？

Answer 1

确保在组建SAS时添加到期时间&se=（如&se=1555372034中所示）。它应该是最后一个参数。这是我能够重现你所看到的HTTP 400的唯一方法（通过省略它）。一旦解决了这个问题，你应该得到204 No Content。

资源（&sr=）部分在您的情况下似乎有些偏差，没有指定设备。使用Device Explorer生成设备 SAS（或者仅查看它应该是什么样子）：管理＆gt; SAS令牌。

SAS structure -
SharedAccessSignature sig={signature-string}&se={expiry}&skn={policyName}&sr={URL-encoded-resourceURI}

$ curl -i https://poorlyfundedskynet.azure-devices.net/devices/dexter/messages/events?api-version=2016-11-14 \
    -H "Authorization: SharedAccessSignature sr=poorlyfundedskynet.azure-devices.net%2fdevices%2fdexter&sig=RxxxxxxxtE%3d&se=1555372034" \
    -H "Content-Type: application/json" \
    -d'{"deviceId":"dexter","temperature":70}'

  HTTP/1.1 204 No Content
  Content-Length: 0
  Server: Microsoft-HTTPAPI/2.0
  Date: Sun, 15 Apr 2018 23:54:25 GMT

您可以使用Device Explorer或iothub-explorer

监控入口

这可能也会起作用：Azure IoT Extension for Azure CLI 2.0