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Remove temporary buffer in ConfigFile.ino #8298

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merged 1 commit into from
Sep 16, 2021
+4 −15
Merged

Remove temporary buffer in ConfigFile.ino #8298

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19 changes: 4 additions & 15 deletions libraries/esp8266/examples/ConfigFile/ConfigFile.ino
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Original file line number Diff line number Diff line change
Expand Up @@ -11,29 +11,18 @@
#include "FS.h"
#include <LittleFS.h>

// more and possibly updated information can be found at:
// https://arduinojson.org/v6/example/config/

bool loadConfig() {
File configFile = LittleFS.open("/config.json", "r");
if (!configFile) {
Serial.println("Failed to open config file");
return false;
}

size_t size = configFile.size();
if (size > 1024) {
Serial.println("Config file size is too large");
return false;
}

// Allocate a buffer to store contents of the file.
std::unique_ptr<char[]> buf(new char[size]);

// We don't use String here because ArduinoJson library requires the input
// buffer to be mutable. If you don't use ArduinoJson, you may as well
// use configFile.readString instead.
configFile.readBytes(buf.get(), size);

StaticJsonDocument<200> doc;
auto error = deserializeJson(doc, buf.get());
auto error = deserializeJson(doc, configFile);
if (error) {
Serial.println("Failed to parse config file");
return false;
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