Question

我正在使用Adafruit Feather Huzzah ESP8266和ArduinoJson library来解析HTTP请求的响应。我已经成功获得了预期的响应，但是反序列化过程每隔一次失败，它遍历循环。我认为这可能是内存分配问题，但我无法解决问题。任何帮助将不胜感激。

我尝试过使用动态文档还是静态文档，并在循环内/循环外初始化它们而没有成功。我也尝试了doc.clear（）方法来释放内存，但是仍然没有运气。下面是我的循环，缺少连接参数：

void loop() {
  WiFiClientSecure client;

  for (int i = 0; i <= numOfInstallations - 1; i++) {

    String url = "/v2/installations/" + String(idSites[i]) + 
               "/widgets/Graph?attributeCodes[]=SOC&instance=" + String(instance[i]) + 
               "&start=" + String(startTime) + 
               "&end=" + String(endTime);

    client.print(String("GET ") + url + " HTTP/1.1\r\n" +
               "Host: " + host + "\r\n" +
               "X-Authorization: Token " + token + "\r\n" +
               "Connection: keep-alive\r\n\r\n");

    Serial.println(String("GET ") + url + " HTTP/1.1\r\n" +
             "Host: " + host + "\r\n" +
             "X-Authorization: Token " + token + "\r\n" +
             "Connection: keep-alive\r\n\r\n");

    Serial.println("request sent");
    delay(500);

    // Ignore the response headers
    char endOfHeaders[] = "\r\n\r\n";
    if (!client.find(endOfHeaders)) {
      Serial.println(F("No headers"));
      return;
    }
    const size_t capacity = 5*JSON_ARRAY_SIZE(2) + JSON_ARRAY_SIZE(5) + 2*JSON_OBJECT_SIZE(1) + 2*JSON_OBJECT_SIZE(2) + JSON_OBJECT_SIZE(4) + 130;
    DynamicJsonDocument doc(capacity);                       // Json document setup
    // Get the Json data from the response
    DeserializationError error = deserializeJson(doc, client);
    if (error) {
      Serial.print(F("deserializeJson() failed: "));
      Serial.println(error.c_str());
      Serial.print("\r\n");
    }
    else {
      Serial.println("deserializeJson() successful\r\n");
    }
  }
}

我希望每次反序列化过程都能成功，但这是输出：

GET /v2/installations/xxxxx/widgets/Graph?attributeCodes[]=SOC&instance=215&start=1555070100&end=1555070400 HTTP/1.1
Host: vrmapi.victronenergy.com
X-Authorization: Token c324f8876e672ad1797cd69a9d9f62611507d25aa5a0b1ff40f9fb524d96f2fc
Connection: keep-alive


request sent
deserializeJson() successful

GET /v2/installations/xxxxx/widgets/Graph?attributeCodes[]=SOC&instance=258&start=1555070100&end=1555070400 HTTP/1.1
Host: vrmapi.victronenergy.com
X-Authorization: Token XXXXXXXXXX
Connection: keep-alive


request sent
deserializeJson() failed: InvalidInput

GET /v2/installations/xxxxx/widgets/Graph?attributeCodes[]=SOC&instance=258&start=1555070100&end=1555070400 HTTP/1.1
Host: vrmapi.victronenergy.com
X-Authorization: Token XXXXXXXXXX
Connection: keep-alive


request sent
deserializeJson() successful

GET /v2/installations/xxxxx/widgets/Graph?attributeCodes[]=SOC&instance=258&start=1555070100&end=1555070400 HTTP/1.1
Host: vrmapi.victronenergy.com
X-Authorization: Token XXXXXXXXXX
Connection: keep-alive


request sent
deserializeJson() failed: InvalidInput

GET /v2/installations/xxxxx/widgets/Graph?attributeCodes[]=SOC&instance=258&start=1555070100&end=1555070400 HTTP/1.1
Host: vrmapi.victronenergy.com
X-Authorization: Token XXXXXXXXXX
Connection: keep-alive


request sent
deserializeJson() successful

如何在循环中反序列化来自HTTP请求的Json响应

0 个答案: