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POST web server example (#2705)

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* POST web server example

Should help with the confusion around the plain keyword

* Update WiFi settings vars, use LED_BUILTIN
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James Marlowe 2019-10-31 08:47:47 -05:00 committed by david gauchard
parent 72dd589599
commit ba971fe7e9
1 changed files with 126 additions and 0 deletions
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126
libraries/ESP8266WebServer/examples/PostServer/PostServer.ino Normal file
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#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>
#ifndef STASSID
#define STASSID "your-ssid"
#define STAPSK "your-password"
#endif
const char* ssid = STASSID;
const char* password = STAPSK;
ESP8266WebServer server(80);
const int led = LED_BUILTIN;
const String postForms = "<html>\
<head>\
<title>ESP8266 Web Server POST handling</title>\
<style>\
body { background-color: #cccccc; font-family: Arial, Helvetica, Sans-Serif; Color: #000088; }\
</style>\
</head>\
<body>\
<h1>POST plain text to /postplain/</h1><br>\
<form method=\"post\" enctype=\"text/plain\" action=\"/postplain/\">\
<input type=\"text\" name=\'{\"hello\": \"world\", \"trash\": \"\' value=\'\"}\'><br>\
<input type=\"submit\" value=\"Submit\">\
</form>\
<h1>POST form data to /postform/</h1><br>\
<form method=\"post\" enctype=\"application/x-www-form-urlencoded\" action=\"/postform/\">\
<input type=\"text\" name=\"hello\" value=\"world\"><br>\
<input type=\"submit\" value=\"Submit\">\
</form>\
</body>\
</html>";
void handleRoot() {
digitalWrite(led, 1);
server.send(200, "text/plain", postForms);
digitalWrite(led, 0);
}
void handlePlain() {
if (server.method() != HTTP_POST) {
digitalWrite(led, 1);
server.send(405, "text/plain", "Method Not Allowed");
digitalWrite(led, 0);
} else {
digitalWrite(led, 1);
server.send(200, "text/plain", "POST body was:\n" + server.arg("plain"));
digitalWrite(led, 0);
}
}
void handleForm() {
if (server.method() != HTTP_POST) {
digitalWrite(led, 1);
server.send(405, "text/plain", "Method Not Allowed");
digitalWrite(led, 0);
} else {
digitalWrite(led, 1);
String message = "POST form was:\n";
for (uint8_t i = 0; i < server.args(); i++) {
message += " " + server.argName(i) + ": " + server.arg(i) + "\n";
}
server.send(200, "text/plain", message);
digitalWrite(led, 0);
}
}
void handleNotFound() {
digitalWrite(led, 1);
String message = "File Not Found\n\n";
message += "URI: ";
message += server.uri();
message += "\nMethod: ";
message += (server.method() == HTTP_GET) ? "GET" : "POST";
message += "\nArguments: ";
message += server.args();
message += "\n";
for (uint8_t i = 0; i < server.args(); i++) {
message += " " + server.argName(i) + ": " + server.arg(i) + "\n";
}
server.send(404, "text/plain", message);
digitalWrite(led, 0);
}
void setup(void) {
pinMode(led, OUTPUT);
digitalWrite(led, 0);
Serial.begin(115200);
WiFi.begin(ssid, password);
Serial.println("");
// Wait for connection
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.print("Connected to ");
Serial.println(ssid);
Serial.print("IP address: ");
Serial.println(WiFi.localIP());
if (MDNS.begin("esp8266")) {
Serial.println("MDNS responder started");
}
server.on("/", handleRoot);
server.on("/postplain/", handlePlain);
server.on("/postform/", handleForm);
server.onNotFound(handleNotFound);
server.begin();
Serial.println("HTTP server started");
}
void loop(void) {
server.handleClient();
}