Question

我想保留服务器中的一些历史数据。因此，文档说明您必须先向Orion发送订阅，然后Orion会将通知发送给Cygnus。

我这样订阅：

Entity payload = Entity.json("{\r\n" + 
                "   \"entities\": [{\r\n" + 
                "       \"type\": \"Usuario\",\r\n" + 
                "       \"isPattern\": \"true\",\r\n" + 
                "       \"id\": \"Usuario*\"\r\n" + 
                "   }],\r\n" + 
                "   \"attributes\": [],\r\n" + 
                "   \"reference\": \"http://192.168.10.3:5050/notify\",\r\n" + 
                "   \"duration\": \"P4Y\",\r\n" + 
                "   \"notifyConditions\": [{\r\n" + 
                "       \"type\": \"ONCHANGE\",\r\n" + 
                "       \"condValues\": [\r\n" + 
                "           \"speed\"\r\n" + 
                "       ]\r\n" + 
                "   }],\r\n" + 
                "   \"throttling\": \"PT0.001S\"\r\n" + 
                "}");
        Response response = client.target("http://192.168.10.3:1026/v1/subscribeContext")
                .request(MediaType.APPLICATION_JSON_TYPE)
                .post(payload);

以及实体的创建：

Entity payload = Entity.json("{  \"type\": \"Usuario\",  \"id\": \"Usuario22\",  \"temperature\": {    \"value\": \"80.0\"  },  \"location\": {    \"value\": \""+latitud+", "+altitud+"\", \"type\": \"geo:point\",    \"metadata\": {      \"crs\": {        \"value\": \"WGS84\"      }    }  }}");
Response response = client.target("http://192.168.10.3:1026/v2/entities")
                .request(MediaType.APPLICATION_JSON_TYPE)
                .post(payload);

然后，天鹅座日志告诉我：

HTTPBadRequestException: 'fiware-servicepath' header value does not match the number of notified context responses [...]

你们当中有人知道为什么会这样吗？标头的创建应由Orion完成，否则，应使用Cygnus的配置...

谢谢。

更新：

我更改了服务器的http客户端，以使其更易于合并标头。

我的订阅：

CloseableHttpClient client = HttpClients.createDefault();
        HttpPost httpPost = new HttpPost("http://192.168.10.3:1026/v1/subscribeContext");

        String json = "{\r\n" + 
                "   \"entities\": [{\r\n" + 
                "       \"type\": \"cargador\",\r\n" + 
                "       \"isPattern\": \"true\",\r\n" + 
                "       \"id\": \"cargador*\"\r\n" + 
                "   }],\r\n" + 
                "   \"attributes\": [\"speed\"],\r\n" + 
                "   \"reference\": \"http://192.168.10.3:5050/notify\",\r\n" + 
                "   \"duration\": \"P4Y\",\r\n" + 
                "   \"notifyConditions\": [{\r\n" + 
                "       \"type\": \"ONCHANGE\",\r\n" + 
                "       \"condValues\": [\r\n" + 
                "           \"speed\"\r\n" + 
                "       ]\r\n" + 
                "   }],\r\n" + 
                "   \"throttling\": \"PT0.001S\"\r\n" + 
                "}";
        StringEntity entity;
        try {
            entity = new StringEntity(json);
            httpPost.setEntity(entity);
            httpPost.setHeader("Accept", "application/json");
            httpPost.setHeader("Content-type", "application/json");
            httpPost.setHeader("fiware-servicepath", "/");
            CloseableHttpResponse response;
                response = client.execute(httpPost);
            System.out.println(response.getStatusLine());
            client.close();

        } catch (UnsupportedEncodingException e1) {

我的更新上下文：

CloseableHttpClient client = HttpClients.custom().setDefaultRequestConfig(RequestConfig.custom().setCookieSpec(CookieSpecs.STANDARD).build()).build();
        HttpPost httpPost = new HttpPost("http://192.168.10.3:1026/v1/updateContext");

        String json = "{\r\n" + 
                " \"contextElements\": \r\n" + 
                "\r\n" + 
                "                   \r\n" + 
                "\r\n" + 
                "                       [\r\n" + 
                "   {\r\n" + 
                "     \"type\": \"cargador\",\r\n" + 
                "     \"isPattern\": \"false\",\r\n" + 
                "     \"id\": \"cargador48\",\r\n" + 
                "     \"attributes\": [\r\n" + 
                "        {\r\n" + 
                "          \"name\": \"speed\",\r\n" + 
                "          \"type\": \"float\",\r\n" + 
                "          \"value\": \"798\"\r\n" + 
                "        }\r\n" +  
                "      ]\r\n" + 
                "    }\r\n" + 
                "  ],\r\n" + 
                "  \"updateAction\": \"APPEND\"\r\n" + 
                "  }";

        StringEntity entity;
        try {
            entity = new StringEntity(json);
            httpPost.setEntity(entity);
            httpPost.setHeader("Accept", "application/json");
            httpPost.setHeader("Content-type", "application/json");
            httpPost.setHeader("fiware-servicepath", "/");
            CloseableHttpResponse response;
                response = client.execute(httpPost);
            System.out.println(response.getStatusLine());
            client.close();

我生成的跟踪如下：

再次感谢您。

Answer 1

您收到的错误消息似乎表明您正在尝试使用较新的NGSI v2格式发送对Cygnus的订阅，但是当前的Cygnus版本仅接受旧NGSI v1格式的通知-attrsFormat=legacy因此，在设置订阅时需要提供此属性

请参阅this question，以获取有关如何修复它的更多详细信息。

FIWARE [NGSI] Orion-Cygnus-Hadoop HTTPBadRequestException：通过Orion订阅获得的“ fiware-servicepath”

1 个答案: