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Added chunk response from PROGMEM content example

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This commit is contained in:
Mathieu Carbou
2024-11-12 10:10:10 +01:00
parent 02f7b4f65d
commit 116fe43eec
1 changed files with 36 additions and 0 deletions
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36
examples/SimpleServer/SimpleServer.ino
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@@ -87,6 +87,8 @@ const char* htmlContent PROGMEM = R"(
</html>
)";
const size_t htmlContentLength = strlen_P(htmlContent);
const char* staticContent PROGMEM = R"(
<!DOCTYPE html>
<html>
@@ -467,6 +469,40 @@ void setup() {
request->send(response);
});
// curl -N -v -X GET http://192.168.4.1/chunked.html --output -
// curl -N -v -X GET -H "if-none-match: 4272" http://192.168.4.1/chunked.html --output -
server.on("/chunked.html", HTTP_GET, [](AsyncWebServerRequest* request) {
String len = String(htmlContentLength);
if (request->header(asyncsrv::T_INM) == len) {
request->send(304);
return;
}
AsyncWebServerResponse* response = request->beginChunkedResponse("text/html", [](uint8_t* buffer, size_t maxLen, size_t index) -> size_t {
Serial.printf("%u / %u\n", index, htmlContentLength);
// finished ?
if (htmlContentLength <= index) {
Serial.println("finished");
return 0;
}
// serve a maximum of 1024 or maxLen bytes of the remaining content
const int chunkSize = min((size_t)1024, min(maxLen, htmlContentLength - index));
Serial.printf("sending: %u\n", chunkSize);
memcpy(buffer, htmlContent + index, chunkSize);
return chunkSize;
});
response->addHeader(asyncsrv::T_Cache_Control, "public,max-age=60");
response->addHeader(asyncsrv::T_ETag, len);
request->send(response);
});
/*
❯ curl -I -X HEAD http://192.168.4.1/download
HTTP/1.1 200 OK