3.3.7

libraries/WebServer/examples/ChunkWriting/ChunkWriting.ino

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+/*
+ * This example demonstrates how to send an HTTP response using chunks
+ * It will create an HTTP Server (port 80) associated with an a MDNS service
+ * Access the HTTP server using a Web Browser:
+ * URL can be composed using the MDNS name "esp32_chunk_resp.local"
+ * http://esp32_chunk_resp.local/
+ * or the IP Address that will be printed out, such as for instance 192.168.1.10
+ * http://192.168.1.10/
+ *
+ * ESP32 Server response can also be viewed using the curl command:
+ * curl -i esp32_chunk_resp.local:80
+ * curl -i --raw esp32_chunk_resp.local:80
+ */
+
+#include <WiFi.h>
+#include <NetworkClient.h>
+#include <WebServer.h>
+#include <ESPmDNS.h>
+
+const char *ssid = "........";
+const char *password = "........";
+
+WebServer server(80);
+
+void handleChunks() {
+  uint8_t countDown = 10;
+  server.chunkResponseBegin();
+  char countContent[8];
+  while (countDown) {
+    sprintf(countContent, "%d...\r\n", countDown--);
+    server.chunkWrite(countContent, strlen(countContent));
+    // count down shall show up in the browser only after about 5 seconds when finishing the whole transmission
+    // using "curl -i esp32_chunk_resp.local:80", it will show the count down as it sends each chunk
+    delay(500);
+  }
+  server.chunkWrite("DONE!", 5);
+  server.chunkResponseEnd();
+}
+
+void setup(void) {
+  Serial.begin(115200);
+  WiFi.mode(WIFI_STA);
+  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());
+
+  // Use the URL: http://esp32_chunk_resp.local/
+  if (MDNS.begin("esp32_chunk_resp")) {
+    Serial.println("MDNS responder started");
+  }
+
+  server.on("/", handleChunks);
+
+  server.onNotFound([]() {
+    server.send(404, "text/plain", "Page not found");
+  });
+
+  server.begin();
+  Serial.println("HTTP server started");
+}
+
+void loop(void) {
+  server.handleClient();
+  delay(2);  //allow the cpu to switch to other tasks
+}

libraries/WebServer/examples/ChunkWriting/ci.yml

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+requires_any:
+  - CONFIG_SOC_WIFI_SUPPORTED=y
+  - CONFIG_ESP_WIFI_REMOTE_ENABLED=y