[问答]

如何向Web服务器发送多个POST请求？

问答对人有帮助，内容完整，我也想知道答案 0 在这里，我试图将数据从 nodeMCU 发送到两条路线“/tempData”和“/updateValues”。我尝试了下面的代码，但它不起作用。任何帮助将不胜感激。代码：全选// For WiFI Connectivity #include // for temperature #include int pinDHT22 = 2; SimpleDHT22 dht22(pinDHT22); // WiFi SSID const char* ssid = "ssid"; // WiFi Password const char* password = "password"; // Enter Server-URL here const char* host = "server_url"; void setup() { Serial.begin(74880); Serial.println(); Serial.println(); Serial.print("Connecting to "); Serial.println(ssid); WiFi.begin(ssid, password); while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); } Serial.println(""); Serial.println("WiFi connected"); Serial.println("IP address: "); Serial.println(WiFi.localIP()); } void loop() { float temperature = 0; float humidity = 0; int err = SimpleDHTErrSuccess; if ((err = dht22.read2(&temperature, &humidity, NULL)) != SimpleDHTErrSuccess) { //Check for connection error Serial.print("Read DHT22 failed, err="); Serial.println(err);delay(2000); return; } Serial.print("connecting to "); Serial.println(host); // Use WiFiClient class to create TCP connections WiFiClient client; const int httpPort = 80; if (!client.connect(host, httpPort)) { Serial.println("connection failed"); return; } // We now create a URI for the request String url = "/"; Serial.print("Temperature: "); Serial.print((float)temperature); Serial.println(" C, "); Serial.print("Requesting URL: "); Serial.println(url); // Location Coordinates (hard coded) when GPS module not in use String loc = "del"; // Package-ID of the package being trasported String id = "H103"; String data = ("Temperature=" + String(((float)temperature)) + "&packageID=" + id + "&Location=" + loc); Serial.print("Requesting POST: "); // HTTP FORMAT // Send request to the server: client.println("POST /tempData HTTP/1.1"); client.println("Host: server_url"); client.println("Accept: /"); client.println("Content-Type: application/x-www-form-urlencoded"); client.print("Content-Length: "); client.println(data.length()); client.println(); client.print(data); // This will send the request to the server Serial.print("Requesting POST: "); // HTTP FORMAT // Send request to the server: client.println("POST /updateValues HTTP/1.1"); client.println("Host: server_url"); client.println("Accept: /*"); client.println("Content-Type: application/x-www-form-urlencoded"); client.print("Content-Length: "); client.println(data.length()); client.println(); client.print(data); // This will send the request to the server unsigned long timeout = millis(); while (client.available() == 0) { if (millis() - timeout > 5000) { Serial.println(">>> Client Timeout !"); client.stop(); return; } } // Read all the lines of the reply from server and print them to Serial while(client.available()){ String line = client.readStringUntil('r'); Serial.print(line); } Serial.println(); Serial.println("closing connection"); } 0
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