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jamesmarlowed-a-v
jamesmarlowe
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POST web server example (#2705)
* POST web server example Should help with the confusion around the plain keyword * Update WiFi settings vars, use LED_BUILTIN
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‎libraries/ESP8266WebServer/examples/PostServer/PostServer.ino

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#include <ESP8266WiFi.h>
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#include <WiFiClient.h>
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#include <ESP8266WebServer.h>
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#include <ESP8266mDNS.h>
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#ifndef STASSID
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#define STASSID "your-ssid"
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#define STAPSK "your-password"
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#endif
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const char* ssid = STASSID;
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const char* password = STAPSK;
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ESP8266WebServer server(80);
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const int led = LED_BUILTIN;
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const String postForms = "<html>\
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<head>\
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<title>ESP8266 Web Server POST handling</title>\
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<style>\
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body { background-color: #cccccc; font-family: Arial, Helvetica, Sans-Serif; Color: #000088; }\
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</style>\
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</head>\
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<body>\
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<h1>POST plain text to /postplain/</h1><br>\
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<form method=\"post\" enctype=\"text/plain\" action=\"/postplain/\">\
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<input type=\"text\" name=\'{\"hello\": \"world\", \"trash\": \"\' value=\'\"}\'><br>\
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<input type=\"submit\" value=\"Submit\">\
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</form>\
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<h1>POST form data to /postform/</h1><br>\
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<form method=\"post\" enctype=\"application/x-www-form-urlencoded\" action=\"/postform/\">\
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<input type=\"text\" name=\"hello\" value=\"world\"><br>\
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<input type=\"submit\" value=\"Submit\">\
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</form>\
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</body>\
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</html>";
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void handleRoot() {
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digitalWrite(led, 1);
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server.send(200, "text/plain", postForms);
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digitalWrite(led, 0);
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}
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void handlePlain() {
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if (server.method() != HTTP_POST) {
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digitalWrite(led, 1);
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server.send(405, "text/plain", "Method Not Allowed");
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digitalWrite(led, 0);
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} else {
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digitalWrite(led, 1);
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server.send(200, "text/plain", "POST body was:\n" + server.arg("plain"));
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digitalWrite(led, 0);
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}
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}
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void handleForm() {
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if (server.method() != HTTP_POST) {
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digitalWrite(led, 1);
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server.send(405, "text/plain", "Method Not Allowed");
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digitalWrite(led, 0);
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} else {
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digitalWrite(led, 1);
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String message = "POST form was:\n";
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for (uint8_t i = 0; i < server.args(); i++) {
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message += " " + server.argName(i) + ": " + server.arg(i) + "\n";
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}
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server.send(200, "text/plain", message);
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digitalWrite(led, 0);
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}
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}
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void handleNotFound() {
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digitalWrite(led, 1);
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String message = "File Not Found\n\n";
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message += "URI: ";
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message += server.uri();
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message += "\nMethod: ";
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message += (server.method() == HTTP_GET) ? "GET" : "POST";
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message += "\nArguments: ";
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message += server.args();
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message += "\n";
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for (uint8_t i = 0; i < server.args(); i++) {
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message += " " + server.argName(i) + ": " + server.arg(i) + "\n";
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}
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server.send(404, "text/plain", message);
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digitalWrite(led, 0);
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}
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void setup(void) {
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pinMode(led, OUTPUT);
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digitalWrite(led, 0);
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Serial.begin(115200);
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WiFi.begin(ssid, password);
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Serial.println("");
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// Wait for connection
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while (WiFi.status() != WL_CONNECTED) {
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delay(500);
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Serial.print(".");
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}
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Serial.println("");
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Serial.print("Connected to ");
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Serial.println(ssid);
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Serial.print("IP address: ");
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Serial.println(WiFi.localIP());
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if (MDNS.begin("esp8266")) {
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Serial.println("MDNS responder started");
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}
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server.on("/", handleRoot);
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server.on("/postplain/", handlePlain);
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server.on("/postform/", handleForm);
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server.onNotFound(handleNotFound);
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server.begin();
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Serial.println("HTTP server started");
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}
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void loop(void) {
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server.handleClient();
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}

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