ESP8266 Community Forum

- Mon Jun 22, 2015 5:19 pm #21290 Good point, I have not looked at the cache header stuff.
https://github.com/jeelabs/esp-link/issues/23

- Mon Jun 22, 2015 5:34 pm #21292 I changed it to this:

Code: Select allvoid ICACHE_FLASH_ATTR jsonHeader(HttpdConnData *connData, int code) {
   httpdStartResponse(connData, code);
   httpdHeader(connData, "Cache-Control", "no-cache, no-store, must-revalidate");
   httpdHeader(connData, "Pragma", "no-cache");
   httpdHeader(connData, "Expires", "0");
   httpdHeader(connData, "Content-Type", "application/json");
   httpdEndHeaders(connData);
}

It seems to work. But...

while hitting F5 endlessly I noticed there must be a memory leak somewhere..... First I disabled heatshrink. When I reload a large file AFTER it was transferred, the heap restores to its original size (after some seconds). When I reload a large file WHILE it is already loading, the heap loses exactly 40 bytes, every time. Those will not restore. I tried and took this number with but one file yet.

- Mon Jun 22, 2015 9:49 pm #21306 Can you describe how you tell the memory leak? What are you transferring and what do you do? I want to make sure I can repro so I can track it down...

- Mon Jun 22, 2015 10:35 pm #21312 Do you use a recent version of esphttpd in your software? If not, you may want to browse through its commit log: I know I have solved a memory leak that sounds suspiciously like this one somewhere. In general, now might be a good idea to switch to a newer version of esp-httpd: I recently modularized it, making it way easier to upgrade while used in a project.