I am using a GET for getting a data from Server, Want to implement a progressbar, for that i tried to capture expectedContentLength in the didReceiveResponse delegate method.
How can it can be solved?
NSString* serverUrl = #"https:testURL";
receivedData = [[NSMutableData alloc] initWithLength:0];
NSURL* url =[NSURL URLWithString:[serverUrl stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url];
[theRequest setValue:#"identity" forHTTPHeaderField:#"Accept-Encoding"];**(I tried it after seeing other solutions over Web)**
[NSURLConnection connectionWithRequest:theRequest delegate:self];
...
- (void) connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
[receivedData setLength:0];
expectedBytes = [response expectedContentLength];
}
- (void) connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response{
_contentLength = [response expectedContentLength];
}
-(void) connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{
_receiveLength += data.length;
}
Do you think so?
Related
In ViewDidLoad method I have added the below code
self.responseData = [NSMutableData data];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:
[NSURL URLWithString:#"my url"]];
[request setHTTPShouldHandleCookies:YES];
[request setHTTPMethod:#"GET"];
NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
[connection start];
And When connection start delegate methods are calling
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
NSHTTPURLResponse* httpResponse = (NSHTTPURLResponse*)response;
NSUInteger responseStatusCode = [httpResponse statusCode];
_responseData = [[NSMutableData alloc] init];
NSLog(#"connection");
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
// Append the new data to the instance variable you declared
[_responseData appendData:data];
NSLog(#"_responseData%#",_responseData);
}
- (NSCachedURLResponse *)connection:(NSURLConnection *)connection
willCacheResponse:(NSCachedURLResponse*)cachedResponse {
// Return nil to indicate not necessary to store a cached response for this connection
return nil;
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
NSError *jError;
jArray= [NSJSONSerialization JSONObjectWithData:_responseData options:NSJSONReadingMutableContainers error:&jError];
[_tableView reloadData];
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
NSLog(#"didFailWithError");
}
This is the way am hitting HTTPS URL but it was taking more time to display the data.Am not getting what is the issue.Can anyone please help me on this issue.
I know about how to post data (UITextField values) to JSON url using POST.But now i tried post Data using GET method to server.I have 10 textFields.I tried like this way
NSString *post1 =[NSString stringWithFormat:#"?&dealImage=%#&dealcatid=%#&DeaTitle=%#&DealDesc=%#&price=%#&cityId=%#&StartDate=%#&EndDate=%#&FromTime=%#&ToTime=%#",
strEncoded, string1 ,pTitle.text ,Description.text ,pPrice.text,string2,beginDate,endDate,beginTime,endTime];
NSData *postData = [post1 dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:#"%d",[postData length]];
NSLog(#"array array %#",postLength);
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init] ;
[request setURL:[NSURL URLWithString:[NSString stringWithFormat:#"http://192.168.3.125:8090/SaveDollar/rest/deals/add"]]];
NSLog(#"getData%#",request);
[request setHTTPMethod:#"GET"];
[request setValue:postLength forHTTPHeaderField:#"Content-Length"];
[request setValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Current-Type"];
[request setHTTPBody:postData];
NSLog(#"getData%#",request);
con3 = [[NSURLConnection alloc]initWithRequest:request delegate:self];
if(con3)
{
webData3=[NSMutableData data];
NSLog(#"Connection successfull");
NSLog(#"GOOD Day My data %#",webData3);
}
else
{
NSLog(#"connection could not be made");
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
if (connection ==con3)
{
[webData3 setLength:0];
}
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
if (connection ==con3)
{
[webData3 appendData:data];
}
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
if (connection ==con3) {
NSLog(#"SOMETHING WENT WRONG WITH URL3");
}
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection{
if (connection==con3)
{ NSLog(#"Succeeded! Received %d bytes of data",[webData3 length]);
NSLog(#"Data is %#",webData3);
NSString *responseText = [[NSString alloc] initWithData:webData3 encoding: NSASCIIStringEncoding];
NSLog(#"Response: %#", responseText);//holds textfield entered value
NSString *newLineStr = #"\n";
responseText = [responseText stringByReplacingOccurrencesOfString:#"<br />" withString:newLineStr];
NSLog(#"ResponesText %#",responseText);
}
}
When after submit console will be show this message"SOMETHING WENT WRONG WITH URL3"
I know posting but now I need post Data and the Get Response also.So I used GET Method but i am not getting response.So Please give me any idea. And then Please tell me what wrong in my code.
Use the callback function
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
If the call is failing the error variable will help you see what is going wrong so you can figure it out yourself.
One thing which might help too is to set your request's content-type field to application/json.
you should collect response data like this:
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
_responseData = [[NSMutableData alloc] init];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[_responseData appendData:data];
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
// connection fail
}
where data is NSMutableData *_responseData;
I am sending a request to server using NSURLConnection, it worked for 2 times , since third time it is not working, delegates are not being called. What i found during debugging is connectionShouldUseCredentialStorage method is called for initial times, third time it was not called and rest of methods are also not called.
Here is my code:
NSString *requestString = [NSString stringWithFormat:#"%#", [serviceParameters JSONFragment], nil];
NSData *requestData = [NSData dataWithBytes: [requestString UTF8String] length: [requestString length]];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL: [NSURL URLWithString: strUrl]];
[request setHTTPMethod:#"POST"];
[request setValue:#"application/json" forHTTPHeaderField:#"Content-type"];
[request setHTTPBody:requestData];
[NSURLConnection connectionWithRequest:urlRequest delegate:self];
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
self.data = [NSMutableData data];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)aData
{
[self.data appendData:aData];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
SBJSON *jsonParser = [[SBJSON new] autorelease];
NSString *jsonString = [[[NSString alloc] initWithData:self.data encoding:NSUTF8StringEncoding] autorelease];
NSError *outError = nil;
id result = [jsonParser objectWithString:jsonString error:&outError];
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
}
- (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge
{
if([challenge.protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust])
{
[challenge.sender useCredential:[NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust] forAuthenticationChallenge:challenge];
}
[challenge.sender continueWithoutCredentialForAuthenticationChallenge:challenge];
}
- (BOOL)connection:(NSURLConnection *)connection canAuthenticateAgainstProtectionSpace:(NSURLProtectionSpace *)protectionSpace
{
if( [[protectionSpace authenticationMethod] isEqualToString:NSURLAuthenticationMethodServerTrust] )
{
return YES;
}
return NO;
}
- (BOOL)connectionShouldUseCredentialStorage:(NSURLConnection *)connection
{
return YES;
}
in .h
NSMutableData * data;
NSURLConnection *connection;
Also add Add
in .m
-(void) startConnection
{
NSString *requestString = [NSString stringWithFormat:#"http://md5.jsontest.com/?text=Pushkraj"];
NSData *requestData = [NSData dataWithBytes: [requestString UTF8String] length: [requestString length]];
NSMutableURLRequest *request=[NSMutableURLRequest requestWithURL:[NSURL URLWithString:requestString]
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:60.0];
data = [NSMutableData dataWithCapacity:0];
[request setHTTPMethod:#"POST"];
[request setValue:#"application/json" forHTTPHeaderField:#"Content-type"];
[request setHTTPBody:requestData];
connection=[[NSURLConnection alloc] initWithRequest:request delegate:self];
[connection start];
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
data = [NSMutableData data];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)aData
{
[data appendData:aData];
NSDictionary * dataDict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];
NSLog(#"dataDict : %#",dataDict);
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSLog(#"connectionDidFinishLoading");
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
NSLog(#"Error : %#",error);
}
Call [self startConnection]; wherever you want means on viewDidLoad or on UIButton Click
You forgot to start connection. You are not saving the reference to NSURLConnection for starting the connection. So replace last line
[NSURLConnection connectionWithRequest:urlRequest delegate:self];
with this
NSURLConnection *cn =[NSURLConnection connectionWithRequest:urlRequest delegate:self];
[cn start];
Hope it helps.
I'm making an NSURLConnection to my server but responseData ends up being null in connectionDidFinishLoading and I can't figure out why. Here's the code for the connection:
NSMutableData *responseData;
- (void)myFunction:(id)sender {
NSString *url = #"http://www.example.com/";
NSURL *URL = [NSURL URLWithString:url];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:URL cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:30.0];
NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
[connection start];
}
// NSURLConnection Delegates
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
[responseData setLength:0];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
[responseData appendData:data];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
} // end connectionDidFinishLoading
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
NSLog(#"Connection error: %#",[error description]);
}
responseData isn't initialized :)
Typical! Just as I finished posting the question the answer dawned on me. I never initialized responseData. So in viewDidLoad I added the line below:
- (void)viewDidLoad
{
[super viewDidLoad];
responseData = [NSMutableData data];
}
I want to send a string like #"projects 02.03.2012" to the backend and receive back a json response with list of projects selected according to the string I send. The back end will be done for me, but I wonder how the request url should look like and whether I will receive proper response. Here is what I've got so far, the request url is just for test.
-(void)requestProjects
{
responseData=[[NSMutableData alloc] init];
responseArray=[[NSMutableArray alloc] init];
NSURLRequest *request = [NSURLRequest requestWithURL:
[NSURL URLWithString:#"http://search.twitter.com/search.json?q=mobtuts&rpp=5"]];
NSURLConnection *connection=[[NSURLConnection alloc] initWithRequest:request delegate:self];
[connection start];
}
#pragma mark NSURLConnection delegate methods
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
[responseData setLength:0];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
[responseData appendData:data];
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
NSLog(#"Connection failed!");
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
NSDictionary *results = [responseString JSONValue];
NSLog(#"Response: %#", results);
}