Category Archives: Uncategorized

Using MSTable’s readWithCompletion to pull data from Server

August 18, 2016Uncategorizedadmin

For the issue of when there is a delete on the server side, it means we have less data on the server side
than the local side.

we need to make sure our local db sync up to that. One way to do that is to pull the data by using MSTable’s
readWithCompletion to get the latest from the server.

Than compare it to the core data.

In your QS******Service.m,

declare some properties to save data:

1 2	@property (nonatomic, strong) NSMutableArray *loadedItems; @property (nonatomic) BOOL moreResults;

Then, we implement a method where we store the results from the server. We use MSTable’s
readWithCompletion method like so:

-(void)loadResultsFromServerWithCompletion:(void (^)(NSArray * result))complete {

__block NSMutableArray * myResults = [NSMutableArray array];

MSTable *itemTable = [self.client tableWithName:@"TodoItem"];

[itemTable readWithCompletion:^(MSQueryResult * _Nullable result, NSError * _Nullable error) {

NSLog(@"finished receiving from remote server");

if(error) { // error is nil if no error occured

NSLog(@"ERROR %@", error);

} else {

for(NSDictionary *item in result.items) { // items is NSArray of records that match query

NSLog(@"Server side - Todo Item: %@", [item objectForKey:@"text"]);

[myResults addObject: item];

}

complete(myResults);

}

}];

}

Then when you get the latest results

[self loadResultsFromServerWithCompletion:^(NSArray *result) {

NSLog(@"%@", result);

//then maybe we can compare server and local.

//if server is less than local, make sure we remove local.

}];

Binary Search Tree part 2

August 6, 2016Uncategorizedadmin

height of the tree

int MyBST::height(Node * node) {

if(node== NULL) {

return 0;

}

else {

cout << "...on node : " << node->data << endl;

//first we get the height of the left

int leftHeight = height(node->left);

int rightHeight = height(node->right);

//which everone is larger gets added?

if((node->right) == NULL && (node->left == NULL)) return 0; //if its a leaf, its a 0

else {

if(leftHeight > rightHeight) return (leftHeight + 1);

else return (rightHeight + 1);

}

Analysis of array allocation and address

July 17, 2016Uncategorizedadmin

//allocate an array (of int pointers) in the heap

int ** table = new int *[8];

cout << "table: " << table << endl;

cout << "*table " << *table << endl;

cout << "(table+1): " << (table+1) << endl;

cout << "*table: " << *table << endl;

table: 0x100700000
*table 0x0

(table+1): 0x100700008
*table: 0x0

custom navigation button

July 16, 2016Uncategorizedadmin

self.navigationItem.leftBarButtonItem = backButton;

UIImage* image3 = [UIImage imageNamed:@"cancel.png"];

CGRect frameimg = CGRectMake(0, 0, image3.size.width, image3.size.height);

UIButton * createEventBtn = [[UIButton alloc] initWithFrame:frameimg];

[createEventBtn setBackgroundImage:image3 forState:UIControlStateNormal];

[createEventBtn addTarget:self action:@selector(createEventInCloud)

forControlEvents:UIControlEventTouchUpInside];

[createEventBtn setShowsTouchWhenHighlighted:YES];

UIBarButtonItem *createEventNavBtn =[[UIBarButtonItem alloc] initWithCustomView:createEventBtn];

self.navigationItem.rightBarButtonItem = createEventNavBtn;

A row of buttons with spacers in between

-(UIBarButtonItem*)createEventNavBtn {

UIImage* addEventImg = [UIImage imageNamed:@"add-event.png"];

CGRect frameimg = CGRectMake(0, 0, addEventImg.size.width, addEventImg.size.height);

UIButton * createEventBtn = [[UIButton alloc] initWithFrame:frameimg];

[createEventBtn setBackgroundImage:addEventImg forState:UIControlStateNormal];

[createEventBtn addTarget:self action:@selector(createEventInCloud)

forControlEvents:UIControlEventTouchUpInside];

[createEventBtn setShowsTouchWhenHighlighted:YES];

return [[UIBarButtonItem alloc] initWithCustomView:createEventBtn];

}

-(UIBarButtonItem*)addKeyValueNavBtn {

UIImage* addKeyValImg = [UIImage imageNamed:@"add-key-value.png"];

CGRect keyValImgFrame = CGRectMake(0, 0, addKeyValImg.size.width, addKeyValImg.size.height);

UIButton * addKeyValBtn = [[UIButton alloc] initWithFrame:keyValImgFrame];

[addKeyValBtn setBackgroundImage:addKeyValImg forState:UIControlStateNormal];

[addKeyValBtn addTarget:self action:@selector(bringUpModal)

forControlEvents:UIControlEventTouchUpInside];

[addKeyValBtn setShowsTouchWhenHighlighted:YES];

return [[UIBarButtonItem alloc] initWithCustomView:addKeyValBtn];

}

UIBarButtonItem * spacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];

spacer.width = 28;

UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:@"Sign Out"

style:UIBarButtonItemStylePlain

target:self

action:@selector(handleBack)];

self.navigationItem.leftBarButtonItem = backButton;

self.navigationItem.rightBarButtonItems = [NSArray arrayWithObjects:

spacer,

[self addKeyValueNavBtn],

spacer,

[self createEventNavBtn],

spacer,

nil];

azure permissions

June 26, 2016Uncategorizedadmin

When you are in Active Directory, it will tell you what kind of Role you have:

Global admin
Billing admin
Service admin
User
…
…

I have found that apps created by Global admin can access the GRAPH API. For example, a user from the Tenant’s Active Directory signs in, and then hits the Graph API to access their user data such as first name, last name, address, email…etc.

If you are a Global Admin, and set up the app, users of this app will have permissions to view their own data.

If you are NOT a Global admin, any app you set, will not have permissions to access Graph API.

VIPER Part 2 – Creating a List Module

June 25, 2016Uncategorizedadmin

demo for xCode 7.3

OOP concepts

June 22, 2016Uncategorizedadmin

http://www.tutorialspoint.com/cplusplus/cpp_data_encapsulation.htm

Protected: epam activities tables

May 30, 2016Uncategorizedadmin

HTTP request using iOS

May 23, 2016Uncategorizedadmin

Example 1 – pass data using Header fields

On the server side, the receiving script will strip the information from the request object and use the data, query the database, and return it.

On our iOS client side, we create a NSURL object that takes in the string of the web api address that we want to hit.

For example in our case it would be

http://104.167.105.220:8080/users/(some email)

NSString –> NSURL –> NSMutableURLRequest

So first, we assemble a string to satisfy the HTTP url.
Then throw it in a NSURL.
Create a NSMutableURLRequest object, and init it with our NSURL.
Manipulate the request object with http header field/value combinations.
set the HTTP VERB

NSMutableURLRequest object (iOS)

#define SERVER_IP_PORT @"104.167.105.220:8080"

NSString * urlStr = [NSString stringWithFormat:@"http://%@/users/%@", SERVER_IP_PORT, self.email];

NSURL *url = [NSURL URLWithString:urlStr];

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

[request addValue:self.email forHTTPHeaderField:@"x-access-email"];

[request addValue:self.auth_token forHTTPHeaderField:@"x-access-token"];

[request setHTTPMethod:@"GET"];

[request setValue:@"application/json; charset=utf-8" forHTTPHeaderField:@"Content-Type"];

NOTE:

The key/value you assign in your NSMutableURLRequest object will be read on the server side (node) on the request object’s header’s properties.

Reading values for HTTP Header fields (node)

apiRoutes.use(function(req, res, next) {

console.log('------apiRoutes.use function to verify token------------');

//X-ACCESS-TOKEN is the key, we need to give it value of token

//so it can authenticate us

// check header or url parameters or post parameters for token

var token = req.headers['x-access-token'];

var email = req.headers['x-access-email'];

console.log('value of email: ' + email);

console.log('value of token: ' + token);

After you have set up your URL Request object, you insert it into a NSURLConnection, and make it run.

NSURLConnection object (iOS)

/* create the connection */

self.connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];

if (self.connection) {

//NSLog(@"GetUserInfoConnection---------> CONNECTION address: %p", self.connection);

self.buffer = [NSMutableData data]; /* initialize the buffer */

//NSLog(@"GetUserInfoConnection---------> BUFFER address: %p", self.buffer);

[self.connection start]; /* start the request */

self.completed = getUserBlk;

}

Full Source

@interface GetUserInfoConnection ()

{

}

//block that gets retained when posting to WS, then used when the connection is finished

@property (nonatomic, copy) OnGetUserFromCloud completed;

@property(nonatomic, copy) NSString * auth_token;

@property(nonatomic, copy) NSString * email;

@property(nonatomic, strong) NSArray * trustedHosts;

@end

@implementation GetUserInfoConnection

#pragma mark - ------------- LifeCycle -------------

-(instancetype)initWithEmail:(NSString*)email andToken:(NSString*)token

{

if(self=[super init])

{

//self.trustedHosts = [NSArray arrayWithObjects:@"cloudatcost.mesotech.ca", nil];

//UserDB * userDB = [[UserDB alloc] init];

//self.auth_token = [userDB getAuthTokenByEmail:email];

self.auth_token = token;

self.email = email;

//NSLog(@"************ GetUserInfoConnection created, address: %p", self);

}

return self;

}

-(void)getUserInfo:(OnGetUserFromCloud)getUserBlk

{

NSString * urlStr = [NSString stringWithFormat:@"http://%@/users/%@", SERVER_IP_PORT, self.email];

NSURL *url = [NSURL URLWithString:urlStr];

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

[request addValue:self.email forHTTPHeaderField:@"x-access-email"];

[request addValue:self.auth_token forHTTPHeaderField:@"x-access-token"];

[request setValue:@"application/json; charset=utf-8" forHTTPHeaderField:@"Content-Type"];

[request setHTTPMethod:@"GET"];

/* create the connection */

self.connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];

if (self.connection) {

//NSLog(@"GetUserInfoConnection---------> CONNECTION address: %p", self.connection);

self.buffer = [NSMutableData data]; /* initialize the buffer */

//NSLog(@"GetUserInfoConnection---------> BUFFER address: %p", self.buffer);

[self.connection start]; /* start the request */

self.completed = getUserBlk;

}

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {

[self showMessageBox:@"error" andMessage:[error localizedDescription] andCancelTitle:@"ok"];

self.completed( nil, nil, [error localizedDescription]);

}

-(void)connectionDidFinishLoading:(NSURLConnection *)connection

{

NSError *error = nil;

NSDictionary* json = [NSJSONSerialization JSONObjectWithData: self.buffer

options: kNilOptions

error: &error];

//NSLog(@"%@", json);

if(error) {

self.completed( nil, nil, [error localizedDescription]);

//if url is wrong

[self showMessageBox:@"error" andMessage:[error localizedDescription] andCancelTitle:@"ok"];

}

else { //success!

self.completed(self.email, json, nil);

}

@end

Example 2 – authenticate a user

Logging in Azure

May 3, 2016UncategorizedAzureadmin

In order to log in Azure

Settings >> Diagnostic Logs >> Logs

Make sure the Application Logging is turned on

Create FTP credential accounts

In order to view your logs, you must create a FTP account so you can log in.

After creating a new FTP user, you’ll see your user name, and the FTP URLs. You will be using these FTP urls and credentials to view your logs.

Use the user name and password you just created to log into FTP client like Filezilla

Once you log in, go to /LogFiles/Application and you’ll see all your logs with timestamps

You can copy the files onto your desktop and view it. However that is not efficient because you don’t want to do a copy every time a log is updated.

Web browser to view your logs

Hence, just put the FTP url into your browser, insert your credentials and update the browser whenever you make a change.