Update na verzi 3.7.2. POZOR: vyzaduje do platformio.ini doplnit lib_compat_mode = strict
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216
examples/ChunkRetryResponse/ChunkRetryResponse.ino
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216
examples/ChunkRetryResponse/ChunkRetryResponse.ino
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// SPDX-License-Identifier: LGPL-3.0-or-later
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// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
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//
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// Shows how to wait in a chunk response for incoming data
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//
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#include <Arduino.h>
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#ifdef ESP32
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#include <AsyncTCP.h>
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#include <WiFi.h>
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#elif defined(ESP8266)
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#include <ESP8266WiFi.h>
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#include <ESPAsyncTCP.h>
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#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
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#include <RPAsyncTCP.h>
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#include <WiFi.h>
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#endif
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#include <ESPAsyncWebServer.h>
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#if __has_include("ArduinoJson.h")
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#include <ArduinoJson.h>
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#include <AsyncJson.h>
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#include <AsyncMessagePack.h>
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#endif
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static const char *htmlContent PROGMEM = R"(
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<!DOCTYPE html>
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<html>
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<head>
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<title>Sample HTML</title>
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</head>
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<body>
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<h1>Hello, World!</h1>
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<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
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rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
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arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
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accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
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Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
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dapibus elit, id varius sem dui id lacus.</p>
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<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
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rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
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arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
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accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
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Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
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dapibus elit, id varius sem dui id lacus.</p>
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<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
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rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
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arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
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accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
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Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
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dapibus elit, id varius sem dui id lacus.</p>
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<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
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rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
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arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
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accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
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Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
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dapibus elit, id varius sem dui id lacus.</p>
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<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
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rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
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arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
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accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
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Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
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dapibus elit, id varius sem dui id lacus.</p>
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<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
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rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
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arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
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accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
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Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
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dapibus elit, id varius sem dui id lacus.</p>
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<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
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rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
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arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
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accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
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Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
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dapibus elit, id varius sem dui id lacus.</p>
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<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
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rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
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arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
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accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
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Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
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dapibus elit, id varius sem dui id lacus.</p>
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</body>
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</html>
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)";
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static const size_t htmlContentLength = strlen_P(htmlContent);
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static AsyncWebServer server(80);
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static AsyncLoggingMiddleware requestLogger;
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static String triggerUART;
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static int key = -1;
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void setup() {
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Serial.begin(115200);
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#ifndef CONFIG_IDF_TARGET_ESP32H2
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WiFi.mode(WIFI_AP);
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WiFi.softAP("esp-captive");
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#endif
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// adds some internal request logging for debugging
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requestLogger.setEnabled(true);
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requestLogger.setOutput(Serial);
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server.addMiddleware(&requestLogger);
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#if __has_include("ArduinoJson.h")
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//
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// HOW TO RUN THIS EXAMPLE:
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//
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// 1. Trigger a request that will be blocked for a long time:
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// > time curl -v -X POST http://192.168.4.1/api -H "Content-Type: application/json" -d '{"input": "Please type a key to continue in Serial console..."}' --output -
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//
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// 2. While waiting, in another terminal, run some concurrent requests:
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// > time curl -v http://192.168.4.1/
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//
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// 3. Type a key in the Serial console to continue the processing within 30 seconds.
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// This should unblock the first request.
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//
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server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
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// need to cast to uint8_t*
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// if you do not, the const char* will be copied in a temporary String buffer
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request->send(200, "text/html", (uint8_t *)htmlContent, htmlContentLength);
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});
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server.on(
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"/api", HTTP_POST,
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[](AsyncWebServerRequest *request) {
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// request parsing has finished
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// no data ?
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if (!((String *)request->_tempObject)->length()) {
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request->send(400);
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return;
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}
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JsonDocument doc;
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// deserialize and check for errors
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if (deserializeJson(doc, *(String *)request->_tempObject)) {
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request->send(400);
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return;
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}
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// start UART com: UART will send the data to the Serial console and wait for the key press
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triggerUART = doc["input"].as<const char *>();
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key = -1;
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AsyncWebServerResponse *response = request->beginChunkedResponse("text/plain", [](uint8_t *buffer, size_t maxLen, size_t index) -> size_t {
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// still waiting for UARY ?
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if (triggerUART.length() && key == -1) {
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return RESPONSE_TRY_AGAIN;
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}
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// finished ?
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if (!triggerUART.length() && key == -1) {
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return 0; // 0 means we are done
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}
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// log_d("UART answered!");
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String answer = "You typed: ";
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answer.concat((char)key);
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// note: I did not check for maxLen, but you should (see ChunkResponse.ino)
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memcpy(buffer, answer.c_str(), answer.length());
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// finish!
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triggerUART = emptyString;
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key = -1;
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return answer.length();
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});
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request->send(response);
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},
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NULL, // upload handler is not used so it should be NULL
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[](AsyncWebServerRequest *request, uint8_t *data, size_t len, size_t index, size_t total) {
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// log_d("Body: index: %u, len: %u, total: %u", index, len, total);
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if (!index) {
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// log_d("Start body parsing");
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request->_tempObject = new String();
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// cast request->_tempObject pointer to String and reserve total size
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((String *)request->_tempObject)->reserve(total);
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// set timeout 30s
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request->client()->setRxTimeout(30);
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}
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// log_d("Append body data");
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((String *)request->_tempObject)->concat((const char *)data, len);
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}
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);
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#endif
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server.begin();
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}
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void loop() {
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if (triggerUART.length() && key == -1) {
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Serial.println(triggerUART);
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// log_d("Waiting for UART input...");
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while (!Serial.available()) {
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delay(100);
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}
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key = Serial.read();
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Serial.flush();
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// log_d("UART input: %c", key);
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triggerUART = emptyString;
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}
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}
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