How to I do a HTTP GET request of some data in JSON format, from one API endpoint and POST it back to another API endpoint.
-(void)GetRequest{
//Init the NSURLSession with a configuration
NSURLSessionConfiguration *defaultConfigObject = [NSURLSessionConfiguration defaultSessionConfiguration];
NSURLSession *defaultSession = [NSURLSession sessionWithConfiguration: defaultConfigObject delegate: nil delegateQueue: [NSOperationQueue mainQueue]];
//Create an URLRequest
NSURL *url = [NSURL URLWithString:#"Your URL"];
NSMutableURLRequest *urlRequest = [NSMutableURLRequest requestWithURL:url];
[urlRequest setHTTPMethod:#"GET"];
[urlRequest setValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Content-Type"];
//Create task
NSURLSessionDataTask *dataTask = [defaultSession dataTaskWithRequest:urlRequest completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
//Handle your response here
// NSLog(#"resultsDictionary is %#",response);
}];
[dataTask resume];
}
Related
Using Postman on my Mac I have confirmed GET/POST works to my endpoint. On my iPad I am trying to do the same thing but only GET connects and returns data (just for
testing).
In Postman I have key of devices and value of [{"name":"1","values":[121,182,243]}]
From Postman I can Send and the physical object responds and the server returns an array of all devices and nothing else (which I do not require but that is how it goes). Postman does have x-www-form-urlencoded under Body. This works as expected from Postman.
From my iPad the following code always returns an error 400 which I think means I am providing something the server is not expecting.
+(void)makeRequest {
NSError *error = nil;
storedURL = [[NSUserDefaults standardUserDefaults] objectForKey:#"eb-ipaddress-saved"];
NSString *urlstring = [NSString stringWithFormat:#"http://%#",storedURL];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:urlstring] cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
NSString *jsonPostBody = #"{\"devices\":[{\"name\":\"1\",\"values\":[121,182,243]}]}";
NSData *postData = [jsonPostBody dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:NO];
NSString *postLength = [NSString stringWithFormat:#"%lu",(unsigned long)[postData length]];
[request setHTTPMethod:#"POST"];
[request setValue:postLength forHTTPHeaderField:#"Content-Length"];
[request setValue:#"application/json" forHTTPHeaderField:#"Accept"];
[request setValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Content-Type"];
[request setHTTPBody:postData];
NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response;
if(httpResponse.statusCode == 200)
{
NSError *parseError = nil;
NSDictionary *responseDictionary = [NSJSONSerialization JSONObjectWithData:data options:0 error:&parseError];
NSLog(#"The response is - %#",responseDictionary);
NSInteger success = [[responseDictionary objectForKey:#"success"] integerValue];
if(success == 1)
{
NSLog(#"SUCCESS");
}
else
{
NSLog(#"FAILURE");
}
}
else
{
NSLog(#"Error");
}
}];
[dataTask resume];
}
My 4 logs from above (removed for clarity) return:
urlstring http://192.168.90.55:3000/dmx/set
jsonPostBody {"devices":[{"name":"1","values":[121,182,243]}]}
httpResponse 400
Error
I will eventually switch to variables in my POST when in production.
Thank you
Thanks to Larme's answer I used the code from Postman and that worked.
+(void)makeRequest
{
dispatch_semaphore_t sema = dispatch_semaphore_create(0);
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:#"http://192.168.90.55:3000/dmx/set"]
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:10.0];
NSDictionary *headers = #{
#"Content-Type": #"application/x-www-form-urlencoded"
};
[request setAllHTTPHeaderFields:headers];
NSMutableData *postData = [[NSMutableData alloc] initWithData:[#"devices=[{\"name\":\"1\",\"values\":[121,182,243]}]" dataUsingEncoding:NSUTF8StringEncoding]];
[request setHTTPBody:postData];
[request setHTTPMethod:#"POST"];
NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *dataTask = [session dataTaskWithRequest:request
completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
if (error) {
NSLog(#"%#", error);
dispatch_semaphore_signal(sema);
} else {
NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *) response;
NSError *parseError = nil;
NSDictionary *responseDictionary = [NSJSONSerialization JSONObjectWithData:data options:0 error:&parseError];
NSLog(#"%#",responseDictionary);
dispatch_semaphore_signal(sema);
}
}];
[dataTask resume];
dispatch_semaphore_wait(sema, DISPATCH_TIME_FOREVER);
}
I'm a beginner in the area to work with database on iOS. However I could find a way to connect to a MySQL database, download and parse the json feed. Now in iOS 9, I can't use NSURLConnection anymore, that's why I have to replace it with NSURLSession. I saw many tutorials for example this here. So far, I was not able to replace it. Because I'm under time pressure, I can't waste more time to do this. Is here anyone who could help me to replace it?
My code looks exactly like this:
- (void)downloadItems
{
// Download the json file
NSURL *jsonFileUrl = [NSURL URLWithString:#"http://myhost.ch/test.php"];
// Create the request
NSURLRequest *urlRequest = [[NSURLRequest alloc] initWithURL:jsonFileUrl];
// Create the NSURLConnection
[NSURLConnection connectionWithRequest:urlRequest delegate:self];
}
#pragma mark NSURLConnectionDataProtocol Methods
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
// Initialize the data object
_downloadedData = [[NSMutableData alloc] init];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
// Append the newly downloaded data
[_downloadedData appendData:data];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
// Create an array to store the locations
NSMutableArray *_locations = [[NSMutableArray alloc] init];
// Parse the JSON that came in
NSError *error;
NSArray *jsonArray = [NSJSONSerialization JSONObjectWithData:_downloadedData options:NSJSONReadingAllowFragments error:&error];
// Loop through Json objects, create question objects and add them to our questions array
for (int i = 0; i < jsonArray.count; i++)
{
NSDictionary *jsonElement = jsonArray[i];
// Create a new location object and set its props to JsonElement properties
Location *newLocation = [[Location alloc] init];
newLocation.idS = jsonElement[#"idStatistic"];
newLocation.temp = jsonElement[#"temp"];
newLocation.hum = jsonElement[#"hum"];
newLocation.date_time = jsonElement[#"date_time"];
// Add this question to the locations array
[_locations addObject:newLocation];
}
// Ready to notify delegate that data is ready and pass back items
if (self.delegate)
{
[self.delegate itemsDownloaded:_locations];
}
}
You can try this,
{
NSURL *url = [NSURL URLWithString:#"http://myhost.ch/test.php"];
NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url];
[theRequest setHTTPMethod:#"POST"];
NSURLSession *session = [NSURLSession sharedSession];
NSURLSessionDataTask *task = [session dataTaskWithRequest:theRequest
completionHandler:
^(NSData *data, NSURLResponse *response, NSError *error) {
responseDict = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
NSLog(#"Result:%#", responseDict);
}];
[task resume];
}
Sorry i am really beginner in IPhone development,i am pulling json data from URL and its pulling and loading data perfectly in UITableView, below is code
- (void)fetchFeed
{
NSString *requestString = #"http://bookapi.bignerdranch.com/courses.json";
NSURL *url = [NSURL URLWithString:requestString];
NSURLRequest *req = [NSURLRequest requestWithURL:url];
self.session = [NSURLSession sharedSession];
NSURLSessionDataTask *dataTask =
[self.session dataTaskWithRequest:req
completionHandler:
^(NSData *data, NSURLResponse *response, NSError *error) {
NSDictionary *jsonObject = [NSJSONSerialization JSONObjectWithData:data
options:0
error:nil];
self.courses = jsonObject[#"courses"];
dispatch_async(dispatch_get_main_queue(), ^{
[self.tableView reloadData];
});
}];
[dataTask resume];
}
Now i want to add filter by instructors, Can any one tell me how i can do that.
Thanks
GET
GET request is just a matter of appending query strings to the API url, for example:
NSString *format = [NSString stringWithFormat:#"http://www.yourapiurl.com?id=%#","123";
NSURL *url = [NSURL URLWithString:format];
NSLog(#"%#",url);
//Creating the data object that will hold the content of the URL
NSData *jsonData = [NSData dataWithContentsOfURL:url];
NSError *error = nil;
NSDictionary *result = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingMutableContainers error:&error];
POST
-(NSData *)post:(NSString *)postParams{
//Build the Request
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:#"http://www.yourapiurl.com"]];
[request setHTTPMethod:#"POST"];
[request setValue:[NSString stringWithFormat:#"%lu", (unsigned long)[postParams length]] forHTTPHeaderField:#"Content-length"];
[request setHTTPBody:[postParams dataUsingEncoding:NSUTF8StringEncoding]];
//Send the Request
NSData *returnData = [NSURLConnection sendSynchronousRequest: request returningResponse: nil error: nil];
//Get the Result of Request
NSString *response = [[NSString alloc] initWithBytes:[returnData bytes] length:[returnData length] encoding:NSUTF8StringEncoding];
return returnData;
}
usage:
NSString *postString = [NSString stringWithFormat:#"prop1=%#&prop2=%#&prop3=%#",
"value1","value2","value3"];
NSData *JsonData = [self post :postString];
NSDictionary *result = [NSJSONSerialization JSONObjectWithData:JsonData options:NSJSONReadingMutableContainers error:nil];
//then parse the JSON
I'm having troubles sending a post message to my Wep.api application. I already tried my wep.api on google chrome postman application and it works perfectly. I want my code in the xcode to send this json message to my wep.api
Content-Type: application/json; charset=utf-8
{ UserName: "fjkdlajfka", DeviceID: "1568948" , Password: "fkjdalfda"}
But everytime i send the message, I keep getting null on the parameters. this is my xcode message:
NSString *JsonMsg = [NSString stringWithFormat:#"{UserName: \"%#\",DeviceID: \"%#\",Password: \"%#\"}",
Username.text,#"123456789",Password.text];
NSURL *url = [NSURL URLWithString: #"http://192.168.xxx.xxxx:53913/api/LogIn"];
NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url];
NSString *msgLength = [NSString stringWithFormat:#"%d", [JsonMsg length]];
[theRequest setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
[theRequest setValue:#"application/json" forHTTPHeaderField:#"Accept"];
[theRequest setValue:msgLength forHTTPHeaderField:#"Content-Length"];
[theRequest setHTTPMethod:#"POST"];
[theRequest setHTTPBody:[JsonMsg dataUsingEncoding:NSUTF16BigEndianStringEncoding allowLossyConversion:YES]];
conn = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
if ( conn ) {
webData = [NSMutableData data];
}
else {
NSLog(#"theConnection is NULL");
}
Does anyone know whats the error here?
Your JSON is invalid , you are missing quotes
NSString *JsonMsg = [NSString stringWithFormat:#"{"UserName": \"%#\",
"DeviceID": \"%#\",
"Password": \"%#\"}",
Username.text,#"123456789",Password.text];
[Solved]
I'm trying to edit AFHTTPClient.m to make it work with POST Method in
-(NSMutableURLRequest *)requestWithMethod:(NSString *)method
path:(NSString *)path
parameters:(NSDictionary *)parameters
like this :
if ([method isEqualToString:#"GET"] ||[method isEqualToString:#"POST"] || [method isEqualToString:#"HEAD"] || [method isEqualToString:#"DELETE"])
I have problem with POST method with params userDevice ,I have function subclass from AFHTTPClient like this
EDIT:
I used different method like this but same result
-(void)loginWithEmail:(NSString *)email password:(NSString *)passwords
{
NSString *baseurl = #"http://localhost.com:9000/";
AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:[NSURL URLWithString:baseurl]];
[httpClient registerHTTPOperationClass:[AFJSONRequestOperation class]];
[httpClient setDefaultHeader:#"Accept" value:#"application/json"];
[httpClient setAuthorizationHeaderWithUsername:email password:passwords];
and then this is my params :
NSDictionary *data = [NSDictionary dictionaryWithObjectsAndKeys:
model, #"deviceModel",
systemVersion, #"deviceVersion",
[NSNumber numberWithBool:0], #"productionMode",
appVersion, #"appVersion",
deviceType,#"deviceType", nil];
NSError *error = nil;
NSDictionary* jsonObject = [NSDictionary dictionaryWithObjectsAndKeys:data, #"userDevice", nil];
NSData *jsonLogin =[NSJSONSerialization dataWithJSONObject:jsonObject options:NSJSONWritingPrettyPrinted error:&error];
NSString *jsonLoginString = [[NSString alloc] initWithData:jsonLogin encoding:NSUTF8StringEncoding];
NSLog(#"JSON LOGIN OUTPUT :%#", jsonLoginString);
[httpClient setParameterEncoding:AFJSONParameterEncoding];
I request using this code :
NSMutableURLRequest *request = [httpClient requestWithMethod:#"POST"
path:#"/ios/login"
parameters:[NSDictionary dictionaryWithObjectsAndKeys:jsonLoginString,#"userDevice", nil]
];
AFJSONRequestOperation *operation = nil;
operation = [AFJSONRequestOperation
JSONRequestOperationWithRequest:request
success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
NSLog(#"Response : %#", request);
NSLog(#"JSON: %#",JSON);
}
failure:^(NSURLRequest *request , NSHTTPURLResponse *response, NSError *error , id JSON ){
NSLog(#"error: %#", error);
}];
[operation start];
this is the example json that I wanted :
"userDevice" : {
"appVersion" : "1.0",
"deviceModel" : "iPhone Simulator",
"productionMode" : false,
"deviceType" : "iPhone Simulator",
"deviceVersion" : "6.1"
}
am I missing something?