You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
185 lines
4.8 KiB
185 lines
4.8 KiB
/*
|
|
|
|
API MODULE
|
|
|
|
Copyright (C) 2016-2017 by Xose Pérez <xose dot perez at gmail dot com>
|
|
|
|
*/
|
|
|
|
#if WEB_SUPPORT
|
|
|
|
#include <ESPAsyncTCP.h>
|
|
#include <ESPAsyncWebServer.h>
|
|
#include <ArduinoJson.h>
|
|
#include <Ticker.h>
|
|
|
|
Ticker _api_defer;
|
|
typedef struct {
|
|
char * url;
|
|
char * key;
|
|
apiGetCallbackFunction getFn = NULL;
|
|
apiPutCallbackFunction putFn = NULL;
|
|
} web_api_t;
|
|
std::vector<web_api_t> _apis;
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// API
|
|
// -----------------------------------------------------------------------------
|
|
|
|
bool _authAPI(AsyncWebServerRequest *request) {
|
|
|
|
if (getSetting("apiEnabled", API_ENABLED).toInt() == 0) {
|
|
DEBUG_MSG_P(PSTR("[WEBSERVER] HTTP API is not enabled\n"));
|
|
request->send(403);
|
|
return false;
|
|
}
|
|
|
|
if (!request->hasParam("apikey", (request->method() == HTTP_PUT))) {
|
|
DEBUG_MSG_P(PSTR("[WEBSERVER] Missing apikey parameter\n"));
|
|
request->send(403);
|
|
return false;
|
|
}
|
|
|
|
AsyncWebParameter* p = request->getParam("apikey", (request->method() == HTTP_PUT));
|
|
if (!p->value().equals(getSetting("apiKey"))) {
|
|
DEBUG_MSG_P(PSTR("[WEBSERVER] Wrong apikey parameter\n"));
|
|
request->send(403);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
bool _asJson(AsyncWebServerRequest *request) {
|
|
bool asJson = false;
|
|
if (request->hasHeader("Accept")) {
|
|
AsyncWebHeader* h = request->getHeader("Accept");
|
|
asJson = h->value().equals("application/json");
|
|
}
|
|
return asJson;
|
|
}
|
|
|
|
ArRequestHandlerFunction _bindAPI(unsigned int apiID) {
|
|
|
|
return [apiID](AsyncWebServerRequest *request) {
|
|
|
|
webLog(request);
|
|
if (!_authAPI(request)) return;
|
|
|
|
web_api_t api = _apis[apiID];
|
|
|
|
// Check if its a PUT
|
|
if (api.putFn != NULL) {
|
|
if (request->hasParam("value", request->method() == HTTP_PUT)) {
|
|
AsyncWebParameter* p = request->getParam("value", request->method() == HTTP_PUT);
|
|
(api.putFn)((p->value()).c_str());
|
|
}
|
|
}
|
|
|
|
// Get response from callback
|
|
char value[API_BUFFER_SIZE];
|
|
(api.getFn)(value, API_BUFFER_SIZE);
|
|
|
|
// The response will be a 404 NOT FOUND if the resource is not available
|
|
if (!value) {
|
|
DEBUG_MSG_P(PSTR("[API] Sending 404 response\n"));
|
|
request->send(404);
|
|
return;
|
|
}
|
|
DEBUG_MSG_P(PSTR("[API] Sending response '%s'\n"), value);
|
|
|
|
// Format response according to the Accept header
|
|
if (_asJson(request)) {
|
|
char buffer[64];
|
|
snprintf_P(buffer, sizeof(buffer), PSTR("{ \"%s\": %s }"), api.key, value);
|
|
request->send(200, "application/json", buffer);
|
|
} else {
|
|
request->send(200, "text/plain", value);
|
|
}
|
|
|
|
};
|
|
|
|
}
|
|
|
|
void _onAPIs(AsyncWebServerRequest *request) {
|
|
|
|
webLog(request);
|
|
if (!_authAPI(request)) return;
|
|
|
|
bool asJson = _asJson(request);
|
|
|
|
String output;
|
|
if (asJson) {
|
|
DynamicJsonBuffer jsonBuffer;
|
|
JsonObject& root = jsonBuffer.createObject();
|
|
for (unsigned int i=0; i < _apis.size(); i++) {
|
|
root[_apis[i].key] = _apis[i].url;
|
|
}
|
|
root.printTo(output);
|
|
request->send(200, "application/json", output);
|
|
|
|
} else {
|
|
for (unsigned int i=0; i < _apis.size(); i++) {
|
|
output += _apis[i].key + String(" -> ") + _apis[i].url + String("\n");
|
|
}
|
|
request->send(200, "text/plain", output);
|
|
}
|
|
|
|
}
|
|
|
|
void _onRPC(AsyncWebServerRequest *request) {
|
|
|
|
webLog(request);
|
|
if (!_authAPI(request)) return;
|
|
|
|
//bool asJson = _asJson(request);
|
|
int response = 404;
|
|
|
|
if (request->hasParam("action")) {
|
|
|
|
AsyncWebParameter* p = request->getParam("action");
|
|
String action = p->value();
|
|
DEBUG_MSG_P(PSTR("[RPC] Action: %s\n"), action.c_str());
|
|
|
|
if (action.equals("reset")) {
|
|
response = 200;
|
|
_api_defer.once_ms(100, []() {
|
|
customReset(CUSTOM_RESET_RPC);
|
|
ESP.restart();
|
|
});
|
|
}
|
|
|
|
}
|
|
|
|
request->send(response);
|
|
|
|
}
|
|
|
|
// -----------------------------------------------------------------------------
|
|
|
|
void apiRegister(const char * url, const char * key, apiGetCallbackFunction getFn, apiPutCallbackFunction putFn) {
|
|
|
|
// Store it
|
|
web_api_t api;
|
|
char buffer[40];
|
|
snprintf_P(buffer, sizeof(buffer), PSTR("/api/%s"), url);
|
|
api.url = strdup(buffer);
|
|
api.key = strdup(key);
|
|
api.getFn = getFn;
|
|
api.putFn = putFn;
|
|
_apis.push_back(api);
|
|
|
|
// Bind call
|
|
unsigned int methods = HTTP_GET;
|
|
if (putFn != NULL) methods += HTTP_PUT;
|
|
webServer()->on(buffer, methods, _bindAPI(_apis.size() - 1));
|
|
|
|
}
|
|
|
|
void apiSetup() {
|
|
webServer()->on("/apis", HTTP_GET, _onAPIs);
|
|
webServer()->on("/rpc", HTTP_GET, _onRPC);
|
|
}
|
|
|
|
#endif // WEB_SUPPORT
|