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Fix CORS Middleware

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This commit is contained in:
Mathieu Carbou
2024-09-25 01:33:22 +02:00
parent eacf0eb474
commit 2e65ee60df
2 changed files with 28 additions and 8 deletions
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2
src/ESPAsyncWebServer.h
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@@ -745,6 +745,8 @@ class CorsMiddleware : public AsyncMiddleware {
void setAllowCredentials(bool credentials) { _credentials = credentials; }
void setMaxAge(uint32_t seconds) { _maxAge = seconds; }
void addCORSHeaders(AsyncWebServerResponse* response);
void run(AsyncWebServerRequest* request, ArMiddlewareNext next);
private:

34
src/Middlewares.cpp
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@@ -58,16 +58,34 @@ void LoggingMiddleware::run(AsyncWebServerRequest* request, ArMiddlewareNext nex
}
}
void CorsMiddleware::addCORSHeaders(AsyncWebServerResponse* response) {
response->addHeader(F("Access-Control-Allow-Origin"), _origin.c_str());
response->addHeader(F("Access-Control-Allow-Methods"), _methods.c_str());
response->addHeader(F("Access-Control-Allow-Headers"), _headers.c_str());
response->addHeader(F("Access-Control-Allow-Credentials"), _credentials ? F("true") : F("false"));
response->addHeader(F("Access-Control-Max-Age"), String(_maxAge).c_str());
}
void CorsMiddleware::run(AsyncWebServerRequest* request, ArMiddlewareNext next) {
if (request->method() == HTTP_OPTIONS && request->hasHeader(F("Origin"))) {
AsyncWebServerResponse* response = request->beginResponse(200);
response->addHeader(F("Access-Control-Allow-Origin"), _origin.c_str());
response->addHeader(F("Access-Control-Allow-Methods"), _methods.c_str());
response->addHeader(F("Access-Control-Allow-Headers"), _headers.c_str());
response->addHeader(F("Access-Control-Allow-Credentials"), _credentials ? F("true") : F("false"));
response->addHeader(F("Access-Control-Max-Age"), String(_maxAge).c_str());
request->send(response);
// Origin header ? => CORS handling
if (request->hasHeader(F("Origin"))) {
// check if this is a preflight request => handle it and return
if (request->method() == HTTP_OPTIONS) {
AsyncWebServerResponse* response = request->beginResponse(200);
addCORSHeaders(response);
request->send(response);
return;
}
// CORS request, no options => let the request pass and add CORS headers after
next();
AsyncWebServerResponse* response = request->getResponse();
if (response) {
addCORSHeaders(response);
}
} else {
// NO Origin header => no CORS handling
next();
}
}