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.
253 lines
6.6 KiB
253 lines
6.6 KiB
/*
|
|
|
|
API MODULE
|
|
|
|
Copyright (C) 2016-2019 by Xose Pérez <xose dot perez at gmail dot com>
|
|
|
|
*/
|
|
|
|
#if API_SUPPORT
|
|
|
|
#include <ESPAsyncTCP.h>
|
|
#include <ESPAsyncWebServer.h>
|
|
#include <ArduinoJson.h>
|
|
#include <vector>
|
|
|
|
#include "system.h"
|
|
|
|
typedef struct {
|
|
char * key;
|
|
api_get_callback_f getFn = NULL;
|
|
api_put_callback_f putFn = NULL;
|
|
} web_api_t;
|
|
std::vector<web_api_t> _apis;
|
|
|
|
// -----------------------------------------------------------------------------
|
|
|
|
bool _apiWebSocketOnKeyCheck(const char * key, JsonVariant& value) {
|
|
return (strncmp(key, "api", 3) == 0);
|
|
}
|
|
|
|
void _apiWebSocketOnConnected(JsonObject& root) {
|
|
root["apiEnabled"] = getSetting("apiEnabled", API_ENABLED).toInt() == 1;
|
|
root["apiKey"] = getSetting("apiKey", API_KEY);
|
|
root["apiRealTime"] = getSetting("apiRealTime", API_REAL_TIME_VALUES).toInt() == 1;
|
|
root["apiRestFul"] = getSetting("apiRestFul", API_RESTFUL).toInt() == 1;
|
|
}
|
|
|
|
void _apiConfigure() {
|
|
// Nothing to do
|
|
}
|
|
|
|
// -----------------------------------------------------------------------------
|
|
// API
|
|
// -----------------------------------------------------------------------------
|
|
|
|
bool _authAPI(AsyncWebServerRequest *request) {
|
|
|
|
const String key = getSetting("apiKey", API_KEY);
|
|
if (!key.length() || getSetting("apiEnabled", API_ENABLED).toInt() == 0) {
|
|
DEBUG_MSG_P(PSTR("[WEBSERVER] HTTP API is not enabled\n"));
|
|
request->send(403);
|
|
return false;
|
|
}
|
|
|
|
AsyncWebParameter* p = request->getParam("apikey", (request->method() == HTTP_PUT));
|
|
if (!p || !p->value().equals(key)) {
|
|
DEBUG_MSG_P(PSTR("[WEBSERVER] Wrong / missing 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;
|
|
}
|
|
|
|
void _onAPIsText(AsyncWebServerRequest *request) {
|
|
AsyncResponseStream *response = request->beginResponseStream("text/plain");
|
|
String output;
|
|
output.reserve(48);
|
|
for (unsigned int i=0; i < _apis.size(); i++) {
|
|
output = "";
|
|
output += _apis[i].key;
|
|
output += " -> ";
|
|
output += "/api/";
|
|
output += _apis[i].key;
|
|
output += '\n';
|
|
response->write(output.c_str());
|
|
}
|
|
request->send(response);
|
|
}
|
|
|
|
constexpr const size_t API_JSON_BUFFER_SIZE = 1024;
|
|
|
|
void _onAPIsJson(AsyncWebServerRequest *request) {
|
|
|
|
|
|
DynamicJsonBuffer jsonBuffer(API_JSON_BUFFER_SIZE);
|
|
JsonObject& root = jsonBuffer.createObject();
|
|
|
|
constexpr const int BUFFER_SIZE = 48;
|
|
|
|
for (unsigned int i=0; i < _apis.size(); i++) {
|
|
char buffer[BUFFER_SIZE] = {0};
|
|
int res = snprintf(buffer, sizeof(buffer), "/api/%s", _apis[i].key);
|
|
if ((res < 0) || (res > (BUFFER_SIZE - 1))) {
|
|
request->send(500);
|
|
return;
|
|
}
|
|
root[_apis[i].key] = buffer;
|
|
}
|
|
AsyncResponseStream *response = request->beginResponseStream("application/json");
|
|
root.printTo(*response);
|
|
request->send(response);
|
|
|
|
}
|
|
|
|
void _onAPIs(AsyncWebServerRequest *request) {
|
|
|
|
webLog(request);
|
|
if (!_authAPI(request)) return;
|
|
|
|
bool asJson = _asJson(request);
|
|
|
|
String output;
|
|
if (asJson) {
|
|
_onAPIsJson(request);
|
|
} else {
|
|
_onAPIsText(request);
|
|
}
|
|
|
|
}
|
|
|
|
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("reboot")) {
|
|
response = 200;
|
|
deferredReset(100, CUSTOM_RESET_RPC);
|
|
}
|
|
|
|
}
|
|
|
|
request->send(response);
|
|
|
|
}
|
|
|
|
bool _apiRequestCallback(AsyncWebServerRequest *request) {
|
|
|
|
String url = request->url();
|
|
|
|
// Main API entry point
|
|
if (url.equals("/api") || url.equals("/apis")) {
|
|
_onAPIs(request);
|
|
return true;
|
|
}
|
|
|
|
// Main RPC entry point
|
|
if (url.equals("/rpc")) {
|
|
_onRPC(request);
|
|
return true;
|
|
}
|
|
|
|
// Not API request
|
|
if (!url.startsWith("/api/")) return false;
|
|
|
|
for (unsigned char i=0; i < _apis.size(); i++) {
|
|
|
|
// Search API url
|
|
web_api_t api = _apis[i];
|
|
if (!url.endsWith(api.key)) continue;
|
|
|
|
// Log and check credentials
|
|
webLog(request);
|
|
if (!_authAPI(request)) return false;
|
|
|
|
// Check if its a PUT
|
|
if (api.putFn != NULL) {
|
|
if ((getSetting("apiRestFul", API_RESTFUL).toInt() != 1) || (request->method() == HTTP_PUT)) {
|
|
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] = {0};
|
|
(api.getFn)(value, API_BUFFER_SIZE);
|
|
|
|
// The response will be a 404 NOT FOUND if the resource is not available
|
|
if (0 == value[0]) {
|
|
DEBUG_MSG_P(PSTR("[API] Sending 404 response\n"));
|
|
request->send(404);
|
|
return false;
|
|
}
|
|
|
|
DEBUG_MSG_P(PSTR("[API] Sending response '%s'\n"), value);
|
|
|
|
// Format response according to the Accept header
|
|
if (_asJson(request)) {
|
|
char buffer[64];
|
|
if (isNumber(value)) {
|
|
snprintf_P(buffer, sizeof(buffer), PSTR("{ \"%s\": %s }"), api.key, value);
|
|
} else {
|
|
snprintf_P(buffer, sizeof(buffer), PSTR("{ \"%s\": \"%s\" }"), api.key, value);
|
|
}
|
|
request->send(200, "application/json", buffer);
|
|
} else {
|
|
request->send(200, "text/plain", value);
|
|
}
|
|
|
|
return true;
|
|
|
|
}
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
// -----------------------------------------------------------------------------
|
|
|
|
void apiRegister(const char * key, api_get_callback_f getFn, api_put_callback_f putFn) {
|
|
|
|
// Store it
|
|
web_api_t api;
|
|
api.key = strdup(key);
|
|
api.getFn = getFn;
|
|
api.putFn = putFn;
|
|
_apis.push_back(api);
|
|
|
|
}
|
|
|
|
void apiSetup() {
|
|
_apiConfigure();
|
|
wsRegister()
|
|
.onVisible([](JsonObject& root) { root["apiVisible"] = 1; })
|
|
.onConnected(_apiWebSocketOnConnected)
|
|
.onKeyCheck(_apiWebSocketOnKeyCheck);
|
|
webRequestRegister(_apiRequestCallback);
|
|
espurnaRegisterReload(_apiConfigure);
|
|
}
|
|
|
|
#endif // API_SUPPORT
|