1 /* ****************************************************************
3 * Copyright 2016 Intel Corporation All Rights Reserved.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
17 ******************************************************************/
20 /// This sample provides steps to define an interface for a resource
21 /// (properties and methods) and host this resource on the server.
26 #include "platform_features.h"
27 #include <condition_variable>
29 #include "OCPlatform.h"
31 #include "ocpayload.h"
36 #include <mmdeviceapi.h>
37 #include <endpointvolume.h>
39 #include <math.h> /* log */
41 #define SAFE_RELEASE(x) \
43 { (x)->Release(); (x) = NULL; }
47 namespace PH = std::placeholders;
50 void * ChangeMediaRepresentation (void *param);
51 void * handleSlowResponse (void *param, std::shared_ptr<OCResourceRequest> pRequest);
53 void setVolume(int vol);
56 // Specifies where to notify all observers or list of observers
57 // false: notifies all observers
58 // true: notifies list of observers
59 bool isListOfObservers = false;
61 // Specifies secure or non-secure
62 // false: non-secure resource
63 // true: secure resource
64 bool isSecure = false;
66 /// Specifies whether Entity handler is going to do slow response or not
67 bool isSlowResponse = false;
70 // Forward declaring the entityHandler
72 /// This class represents a single resource named 'MediaResource'. This resource has
73 /// two simple properties named 'state' and 'volume'
79 /// Access this property from a TB client
83 std::string m_mediaUri;
84 OCResourceHandle m_resourceHandle;
85 OCRepresentation m_mediaRep;
86 ObservationIds m_interestedObservers;
91 :m_name("Media Player"), m_state(false), m_volume(0), m_mediaUri("/a/media"),
92 m_resourceHandle(nullptr)
94 // Initialize representation
95 m_mediaRep.setUri(m_mediaUri);
97 m_mediaRep.setValue("state", m_state);
98 m_mediaRep.setValue("volume", m_volume);
99 m_mediaRep.setValue("name", m_name);
102 /* Note that this does not need to be a member function: for classes you do not have
103 access to, you can accomplish this with a free function: */
105 /// This function internally calls registerResource API.
106 void createResource()
108 //URI of the resource
109 std::string resourceURI = m_mediaUri;
110 //resource type name. In this case, it is media
111 std::string resourceTypeName = "core.media";
112 // resource interface.
113 std::string resourceInterface = DEFAULT_INTERFACE;
115 // OCResourceProperty is defined ocstack.h
116 uint8_t resourceProperty;
119 resourceProperty = OC_DISCOVERABLE | OC_OBSERVABLE | OC_SECURE;
123 resourceProperty = OC_DISCOVERABLE | OC_OBSERVABLE;
125 EntityHandler cb = std::bind(&MediaResource::entityHandler, this,PH::_1);
127 // This will internally create and register the resource.
128 OCStackResult result = OCPlatform::registerResource(
129 m_resourceHandle, resourceURI, resourceTypeName,
130 resourceInterface, cb, resourceProperty);
132 if (OC_STACK_OK != result)
134 cout << "Resource creation was unsuccessful\n";
138 OCResourceHandle getHandle()
140 return m_resourceHandle;
143 // Puts representation.
144 // Gets values from the representation and
145 // updates the internal state
146 void put(OCRepresentation& rep)
150 if (rep.getValue("state", m_state))
152 cout << "\t\t\t\t" << "state: " << m_state << endl;
160 cout << "\t\t\t\t" << "state not found in the representation" << endl;
163 if (rep.getValue("volume", m_volume))
165 cout << "\t\t\t\t" << "volume: " << m_volume << endl;
166 if((0 <= m_volume) && (m_volume <= 100))
173 cout << "\t\t\t\t" << "volume not found in the representation" << endl;
178 cout << e.what() << endl;
183 // Post representation.
184 // Post can create new resource or simply act like put.
185 // Gets values from the representation and
186 // updates the internal state
187 OCRepresentation post(OCRepresentation& rep)
194 // gets the updated representation.
195 // Updates the representation with latest internal state before
197 OCRepresentation get()
199 m_mediaRep.setValue("state", m_state);
200 m_mediaRep.setValue("volume", m_volume);
205 void addType(const std::string& type) const
207 OCStackResult result = OCPlatform::bindTypeToResource(m_resourceHandle, type);
208 if (OC_STACK_OK != result)
210 cout << "Binding TypeName to Resource was unsuccessful\n";
214 void addInterface(const std::string& intf) const
216 OCStackResult result = OCPlatform::bindInterfaceToResource(m_resourceHandle, intf);
217 if (OC_STACK_OK != result)
219 cout << "Binding TypeName to Resource was unsuccessful\n";
224 // This is just a sample implementation of entity handler.
225 // Entity handler can be implemented in several ways by the manufacturer
226 OCEntityHandlerResult entityHandler(std::shared_ptr<OCResourceRequest> request)
228 cout << "\tIn Server CPP entity handler:\n";
229 OCEntityHandlerResult ehResult = OC_EH_ERROR;
232 // Get the request type and request flag
233 std::string requestType = request->getRequestType();
234 int requestFlag = request->getRequestHandlerFlag();
236 if(requestFlag & RequestHandlerFlag::RequestFlag)
238 cout << "\t\trequestFlag : Request\n";
239 auto pResponse = std::make_shared<OC::OCResourceResponse>();
240 pResponse->setRequestHandle(request->getRequestHandle());
241 pResponse->setResourceHandle(request->getResourceHandle());
243 // Check for query params (if any)
244 QueryParamsMap queries = request->getQueryParameters();
246 if (!queries.empty())
248 cout << "\nQuery processing upto entityHandler" << std::endl;
250 for (auto it : queries)
252 cout << "Query key: " << it.first << " value : " << it.second
256 // If the request type is GET
257 if(requestType == "GET")
259 cout << "\t\t\trequestType : GET\n";
260 if(isSlowResponse) // Slow response case
262 static int startedThread = 0;
265 std::thread t(handleSlowResponse, (void *)this, request);
269 ehResult = OC_EH_SLOW;
271 else // normal response case.
273 pResponse->setErrorCode(200);
274 pResponse->setResponseResult(OC_EH_OK);
275 pResponse->setResourceRepresentation(get());
276 if(OC_STACK_OK == OCPlatform::sendResponse(pResponse))
282 else if(requestType == "PUT")
284 cout << "\t\t\trequestType : PUT\n";
285 OCRepresentation rep = request->getResourceRepresentation();
287 // Do related operations related to PUT request
288 // Update the mediaResource
290 pResponse->setErrorCode(200);
291 pResponse->setResponseResult(OC_EH_OK);
292 pResponse->setResourceRepresentation(get());
293 if(OC_STACK_OK == OCPlatform::sendResponse(pResponse))
298 else if(requestType == "POST")
300 cout << "\t\t\trequestType : POST\n";
302 OCRepresentation rep = request->getResourceRepresentation();
304 // Do related operations related to POST request
305 OCRepresentation rep_post = post(rep);
306 pResponse->setResourceRepresentation(rep_post);
307 pResponse->setErrorCode(200);
308 if(rep_post.hasAttribute("createduri"))
310 pResponse->setResponseResult(OC_EH_RESOURCE_CREATED);
311 pResponse->setNewResourceUri(rep_post.getValue<std::string>("createduri"));
315 pResponse->setResponseResult(OC_EH_OK);
318 if(OC_STACK_OK == OCPlatform::sendResponse(pResponse))
323 else if(requestType == "DELETE")
325 cout << "Delete request received" << endl;
329 if(requestFlag & RequestHandlerFlag::ObserverFlag)
331 ObservationInfo observationInfo = request->getObservationInfo();
332 if(ObserveAction::ObserveRegister == observationInfo.action)
334 m_interestedObservers.push_back(observationInfo.obsId);
336 else if(ObserveAction::ObserveUnregister == observationInfo.action)
338 m_interestedObservers.erase(std::remove(
339 m_interestedObservers.begin(),
340 m_interestedObservers.end(),
341 observationInfo.obsId),
342 m_interestedObservers.end());
345 cout << "\t\trequestFlag : Observer\n";
347 static int startedThread = 0;
349 // Observation happens on a different thread in ChangeMediaRepresentation function.
350 // If we have not created the thread already, we will create one here.
354 std::thread t(ChangeMediaRepresentation, (void *)this);
364 cout << "Request invalid" << std::endl;
372 // ChangeMediaRepresentaion is an observation function,
373 // which notifies any changes to the resource to stack
374 // via notifyObservers
375 void * ChangeMediaRepresentation (void *param)
378 MediaResource* mediaPtr = (MediaResource*) param;
380 // This function continuously monitors for the changes
387 prevVolume = mediaPtr->m_volume;
388 mediaPtr->m_volume = getVolume();
389 if (prevVolume == mediaPtr->m_volume)
392 cout << "Volume changed from " << prevVolume << "% to " << mediaPtr->m_volume << "%\n";
394 // If under observation if there are any changes to the media resource
395 // we call notifyObservors
397 // For demostration we are changing the volume value and notifying.
399 cout << "\nVolume updated to : " << mediaPtr->m_volume << endl;
400 cout << "Notifying observers with resource handle: " << mediaPtr->getHandle() << endl;
402 OCStackResult result = OC_STACK_OK;
404 if(isListOfObservers)
406 std::shared_ptr<OCResourceResponse> resourceResponse =
407 {std::make_shared<OCResourceResponse>()};
409 resourceResponse->setErrorCode(200);
410 resourceResponse->setResourceRepresentation(mediaPtr->get(), DEFAULT_INTERFACE);
412 result = OCPlatform::notifyListOfObservers( mediaPtr->getHandle(),
413 mediaPtr->m_interestedObservers,
418 result = OCPlatform::notifyAllObservers(mediaPtr->getHandle());
421 if(OC_STACK_NO_OBSERVERS == result)
423 cout << "No More observers, stopping notifications" << endl;
432 void * handleSlowResponse (void *param, std::shared_ptr<OCResourceRequest> pRequest)
434 // This function handles slow response case
435 MediaResource* mediaPtr = (MediaResource*) param;
436 // Induce a case for slow response by using sleep
437 cout << "SLOW response" << std::endl;
440 auto pResponse = std::make_shared<OC::OCResourceResponse>();
441 pResponse->setRequestHandle(pRequest->getRequestHandle());
442 pResponse->setResourceHandle(pRequest->getResourceHandle());
443 pResponse->setResourceRepresentation(mediaPtr->get());
444 pResponse->setErrorCode(200);
445 pResponse->setResponseResult(OC_EH_OK);
447 // Set the slow response flag back to false
448 isSlowResponse = false;
449 OCPlatform::sendResponse(pResponse);
456 cout << "Usage : mediaserver <value>\n";
457 cout << " Default - Non-secure resource and notify all observers\n";
458 cout << " 1 - Non-secure resource and notify list of observers\n\n";
459 cout << " 2 - Secure resource and notify all observers\n";
460 cout << " 3 - Secure resource and notify list of observers\n\n";
461 cout << " 4 - Non-secure resource, GET slow response, notify all observers\n";
464 static FILE* client_open(const char* /*path*/, const char *mode)
466 return fopen("./oic_svr_db_server.json", mode);
473 // Set up a generic keyboard event.
474 ip.type = INPUT_KEYBOARD;
475 ip.ki.wScan = 0; // hardware scan code for key
477 ip.ki.dwExtraInfo = 0;
478 ip.ki.wVk = VK_MEDIA_PLAY_PAUSE; // virtual-key code for the "a" key
479 ip.ki.dwFlags = 0; // 0 for key press
481 SendInput(1, &ip, sizeof(INPUT));
482 // Release the "Play/Pause" key
483 ip.ki.dwFlags = KEYEVENTF_KEYUP; // KEYEVENTF_KEYUP for key release
484 SendInput(1, &ip, sizeof(INPUT));
489 IAudioEndpointVolume *g_pEndptVol = NULL;
491 IMMDeviceEnumerator *pEnumerator = NULL;
492 IMMDevice *pDevice = NULL;
493 OSVERSIONINFO VersionInfo;
495 ZeroMemory(&VersionInfo, sizeof(OSVERSIONINFO));
496 VersionInfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
497 GetVersionEx(&VersionInfo);
500 // Get enumerator for audio endpoint devices.
501 hr = CoCreateInstance(__uuidof(MMDeviceEnumerator),
502 NULL, CLSCTX_INPROC_SERVER,
503 __uuidof(IMMDeviceEnumerator),
504 (void**)&pEnumerator);
506 // Get default audio-rendering device.
507 hr = pEnumerator->GetDefaultAudioEndpoint(eRender, eConsole, &pDevice);
509 hr = pDevice->Activate(__uuidof(IAudioEndpointVolume),
510 CLSCTX_ALL, NULL, (void**)&g_pEndptVol);
512 hr = g_pEndptVol->GetMasterVolumeLevelScalar(¤tVal);
513 fflush(stdout); // just in case
515 SAFE_RELEASE(pEnumerator)
516 SAFE_RELEASE(pDevice)
517 SAFE_RELEASE(g_pEndptVol)
519 return ((int) round(100 * currentVal));
523 void setVolume(int vol)
525 IAudioEndpointVolume *g_pEndptVol = NULL;
527 IMMDeviceEnumerator *pEnumerator = NULL;
528 IMMDevice *pDevice = NULL;
529 OSVERSIONINFO VersionInfo;
531 ZeroMemory(&VersionInfo, sizeof(OSVERSIONINFO));
532 VersionInfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
533 GetVersionEx(&VersionInfo);
536 // Get enumerator for audio endpoint devices.
537 hr = CoCreateInstance(__uuidof(MMDeviceEnumerator),
538 NULL, CLSCTX_INPROC_SERVER,
539 __uuidof(IMMDeviceEnumerator),
540 (void**)&pEnumerator);
542 // Get default audio-rendering device.
543 hr = pEnumerator->GetDefaultAudioEndpoint(eRender, eConsole, &pDevice);
545 hr = pDevice->Activate(__uuidof(IAudioEndpointVolume),
546 CLSCTX_ALL, NULL, (void**)&g_pEndptVol);
547 float got = (float)vol/100.0; // needs to be within 1.0 to 0.0
548 hr = g_pEndptVol->SetMasterVolumeLevelScalar(got, NULL);
549 fflush(stdout); // just in case
551 SAFE_RELEASE(pEnumerator)
552 SAFE_RELEASE(pDevice)
553 SAFE_RELEASE(g_pEndptVol)
557 int main(int argc, char* argv[])
559 OCPersistentStorage ps {client_open, fread, fwrite, fclose, unlink };
563 isListOfObservers = false;
568 int value = atoi(argv[1]);
572 isListOfObservers = true;
576 isListOfObservers = false;
580 isListOfObservers = true;
584 isSlowResponse = true;
597 // Create PlatformConfig object
599 OC::ServiceType::InProc,
600 OC::ModeType::Server,
601 "0.0.0.0", // By setting to "0.0.0.0", it binds to all available interfaces
602 0, // Uses randomly available port
603 OC::QualityOfService::LowQos,
607 OCPlatform::Configure(cfg);
610 // Create the instance of the resource class
611 // (in this case instance of class 'MediaResource').
612 MediaResource myMedia;
614 // Invoke createResource function of class media.
615 myMedia.createResource();
616 cout << "Created resource." << std::endl;
618 // A condition variable will free the mutex it is given, then do a non-
619 // intensive block until 'notify' is called on it. In this case, since we
620 // don't ever call cv.notify, this should be a non-processor intensive version
623 std::condition_variable cv;
624 std::unique_lock<std::mutex> lock(blocker);
625 cout <<"Waiting" << std::endl;
626 cv.wait(lock, []{return false;});
628 catch(OCException &e)
630 cout << "OCException in main : " << e.what() << endl;
633 // No explicit call to stop the platform.
634 // When OCPlatform::destructor is invoked, internally we do platform cleanup