I am trying to call a webservice but unfortunateley my calls are not recorded and I am not sure why it is doing so ...
here is the code that I am using , maybe I am missing something :
NSURL *URL = [NSURL URLWithString:#"http://www.google.com"];
NSMutableURLRequest *req = [NSMutableURLRequest requestWithURL:URL];
NSURLResponse *response = nil;
NSError *error = nil;
NSData *data = [NSURLConnection sendSynchronousRequest:req returningResponse:&response error:&error];
all I need to do is to be able to load a web page without having to load it in safari nor in a web view
thanks!
Checkout this tutorial on how to connect with a webservice in iOS. It's not as simple as making the connection.
NSURL *url = [NSURL URLWithString:webService];
NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:60.0];
NSURLConnection *theConnection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
if(theConnection) {
//webData = [[NSMutableData data] retain];
}else {
NSLog(#"The Connection is NULL");
}
}
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
webData = [[NSMutableData data] retain];
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
[webData appendData:data];
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
}
Related
I need to download this video http://studiokicks.com/xtr/basic/1.mov The video is not getting downloaded when I use the following code:
NSURL *requestURL = [NSURL URLWithString:itemURL];
NSURLRequest *request = [NSURLRequest requestWithURL:requestURL];
NSData *data = [NSData dataWithContentsOfURL:requestURL];
NSLog(#"data - %d",[data length]);
NSURLConnection *connection = [NSURLConnection connectionWithRequest:request delegate:self];
-(void) connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
NSLog(#"didReceiveResponse");
NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response;
if ((([httpResponse statusCode]/100) == 2)) {
returnData = [NSMutableData data];
}
else
{
NSDictionary *userInfo = [NSDictionary dictionaryWithObject: NSLocalizedString(#"HTTP Error", #"Error message displayed when receving a connection error.")forKey:NSLocalizedDescriptionKey];
NSError *error = [NSError errorWithDomain:#"HTTP" code:[httpResponse statusCode] userInfo:userInfo];
NSLog(#"%#",error);
}
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[returnData appendData:data];
// Build an array from the dictionary for easy access to each entry
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection1
{
NSString *filePath = [VIDEOPATH stringByAppendingPathComponent:[NSString stringWithFormat:#"%#.mov",videoName]];
BOOL success = [returnData writeToFile:filePath atomically:YES];
NSLog(#"successfully saved - %d",success);
}
You need to set a member self.data of type NSMutableData.
Before starting loading the NSURLConnection, initialize: self.data = [NSMutableData new].
In the connectionDidReceiveData method do: [self.data appendData:data].
And in the connectionDidFinishLoading you can view the data.
I am creating this application, it communicates with a PHP script on my web-server.
Last night it was working perfectly. But today two of the connections does not get response.
I've tried the NSURL link in my browser, it works fine. Also one of the connections work, but as i said two connections does not work?
- (void) getVitsTitelByID:(int)id {
NSString *url = [NSString stringWithFormat:#"http://webserver.com /ivitserdk.php?function=gettitelbyid&id=%d", id];
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url] cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:1.0];
connectionTitelByID = [[NSURLConnection alloc] initWithRequest:request delegate:self];
}
connectionDidReciveData:
if(connection == connectionTitelByID){
responseTitel = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
}
connectionDidFinishLoading:
if(connection == connectionTitelByID){
titelLabel.text = responseTitel;
}
I've tried and debugging it.
responseTitel seems to be (null).
Help would be apriceated :)
didReceiveData may be called N (several) times. save the data to a mutably data buffer (queue it up) and in didFinish read it into a string
mock code:
- (void) getVitsTitelByID:(int)identifier {
NSString *url = [NSString stringWithFormat:#"http://webserver.com/ivitserdk.php?function=gettitelbyid&id=%d", identifier];
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:url] cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:1.0];
connectionTitelByID = [[NSURLConnection alloc] initWithRequest:request delegate:self];
dataForConnectionTitelByID = [NSMutableData data];
[connectionTitelByID start];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
if(!data.length) return;
if(connection == connectionTitelByID)
[dataForConnectionTitelByID appendData:data];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
if(connection == connectionTitelByID) {
id str = [[NSString alloc] initWithData:dataForConnectionTitelByID encoding:NSUTF8StringEncoding];
NSLog(#"%#",str);
dataForConnectionTitelByID = nil;
connectionTitelByID = nil;
}
}
I am not getting the correct output from the server. The response I get back everytime is:
Gone
/prod/bwckgens.p_proc_term_datehas been permanently removed from this server.
This is usually recieved when you just direct the web browser to the page here instead of going through this page first. This makes me come to the conclusion that a cookie isn't being saved, but I read in the documentation that this is all handled by the NSURLConnection object. Is there something I am doing wrong here?
#import "PCFViewController.h"
#interface PCFViewController ()
#end
NSMutableData *mutData;
#implementation PCFViewController
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)queryServer {
NSURL *url = [NSURL URLWithString:#"https://selfservice.mypurdue.purdue.edu/prod/bwckschd.p_disp_dyn_sched"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLCacheStorageAllowed timeoutInterval:3.0];
//the reason I perform a GET here is just to get a cookie and communicate like a normal web browser, since directly doing a POST to the proper address isn't working
[request setHTTPMethod:#"GET"];
[request setValue:#"text/html; charset=UTF-8" forHTTPHeaderField:#"Content-Type"];
NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
if (connection) {
mutData = [NSMutableData data];
}
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSLog(#"Succeeded! Received %d bytes of data",[mutData length]);
NSString *str = [[NSString alloc] initWithData:mutData encoding:NSUTF8StringEncoding];
//just to see the contents(for debugging)
NSLog(#"%#", str);
[self handleConnection:connection];
}
-(void)handleConnection:(NSURLConnection *)connection
{
//this is the first step
if ([#"/prod/bwckschd.p_disp_dyn_sched" isEqualToString:[[[connection originalRequest] URL] path]]) {
//first request
//POST
NSURL *url = [NSURL URLWithString:#"https://selfservice.mypurdue.purdue.edu/prod/bwckgens.p_proc_term_date"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLCacheStorageAllowed timeoutInterval:3.0];
[request setHTTPMethod:#"POST"];
NSString *args = #"p_calling_proc=bwckschd.p_disp_dyn_sched&p_term=201320";
NSData *requestBody = [args dataUsingEncoding:NSUTF8StringEncoding];
[request setHTTPBody:requestBody];
connection = [connection initWithRequest:request delegate:self];
[connection start];
if (connection) {
mutData = [NSMutableData data];
}
//second step. Here I send the list of classes(COMPUTER SCIENCE) I want to display as well as the term SPRING2013
}else if([#"/prod/bwckgens.p_proc_term_date" isEqualToString:[[[connection currentRequest] URL] path]]) {
NSURL *url = [NSURL URLWithString:#"https://selfservice.mypurdue.purdue.edu/prod/bwckschd.p_get_crse_unsec"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLCacheStorageAllowed
timeoutInterval:3.0];
[request setHTTPMethod:#"POST"];
NSString *args = #"term_in=201320&sel_subj=dummy&sel_day=dummy&sel_schd=dummy&sel_insm=dummy&sel_camp=dummy&sel_levl=dummy&sel_sess=dummy&sel_instr=dummy&sel_ptrm=dummy&sel_attr=dummy&sel_subj=CS&sel_crse=dummy&sel_title=dummy&sel_schd=%25&sel_from_cred=&sel_to_cred=&sel_camp=%25&sel_ptrm=%25&sel_instr=%25&sel_sess=%25&sel_attr=%25&begin_hh=0&begin_mi=0&begin_ap=a&end_hh=0&end_mi=0&end_ap=a";
NSData *requestBody = [args dataUsingEncoding:NSUTF8StringEncoding];
[request setHTTPBody:requestBody];
connection = [connection initWithRequest:request delegate:self];
[connection start];
if (connection) {
mutData = [NSMutableData data];
}
//the courses should be shown now I have to parse the data
}else if([#"/prod/bwckschd.p_get_crse_unsec" isEqualToString:[[[connection currentRequest] URL] path]]) {
}
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
NSLog(#"%#\n", error.description);
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
[mutData setLength:0];
NSLog(#"%#\n", response.description);
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[mutData appendData:data];
}
#end
You cannot change the Request Object with the same URL Connection once it is started. Read the documentation of NSURLConnection. it says:
The URL request to load. The request object is deep-copied as part of
the initialization process. Changes made to request after this method
returns do not affect the request that is used for the loading
process.
So if you want to hit another URL, you have to create a new URLRequest and new URLConnection object. regarding your question about saving cookies. you can set the cache policy of the URLRequest using the following method
- (void)setCachePolicy:(NSURLRequestCachePolicy)policy
I'm trying do to an app which uses a database (actually in my localhost), I tried with ASIHTTPRequest but having so much troubles with iOS 5 (I learnt how to use ASIHTTPRequest form there : http://www.raywenderlich.com/2965/how-to-write-an-ios-app-that-uses-a-web-service
Now i'm trying with the API provided by Apple : NSURLRequest / NSURLConnection etc,...
I read the Apple online guide and make this first code :
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL
URLWithString:#"http://localhost:8888/testNSURL/index.php"]
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:60.0];
[request setValue:#"Hello world !" forKey:#"myVariable"];
NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:request delegate:self];
if (theConnection) {
receiveData = [NSMutableData data];
}
}
I added the delegates needed by the API
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
- (void)connection:(NSURLConnection *)connection
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
Here is my php code :
<?php
if(isset($_REQUEST["myVariable"])) {
echo $_REQUEST["myVariable"];
}
else echo '$_REQUEST["myVariable"] not found';
?>
So what is wrong? When I start the app, it will immediately crash with this output :
**
**> 2012-04-09 22:52:16.630 NSURLconnextion[819:f803] *** Terminating app
> due to uncaught exception 'NSUnknownKeyException', reason:
> '[<NSURLRequest 0x6b32bd0> setValue:forUndefinedKey:]: this class is
> not key value coding-compliant for the key myVariable.'
> *** First throw call stack: (0x13c8022 0x1559cd6 0x13c7ee1 0x9c0022 0x931f6b 0x931edb 0x2d20 0xd9a1e 0x38401 0x38670 0x38836 0x3f72a
> 0x10596 0x11274 0x20183 0x20c38 0x14634 0x12b2ef5 0x139c195 0x1300ff2
> 0x12ff8da 0x12fed84 0x12fec9b 0x10c65 0x12626 0x29dd 0x2945) terminate
> called throwing an exception**
**
I guess, it means that somethings is wrong with this line :
[request setValue:#"Hello world !" forKey:#"myVariable"];
It actually works if I comment this line.
My question is : How can I send datas to a PHP API, using NSURLRequest and NSURLConnexion?
Thank you for helping.
P.S. By the way, I have poor knowledges about server, PHP ect,...
try this:
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL
URLWithString:#"http://localhost:8888/testNSURL/index.php"]
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:60.0];
[request setHTTPMethod:#"POST"];
NSString *postString = #"myVariable=Hello world !";
[request setHTTPBody:[postString dataUsingEncoding:NSUTF8StringEncoding]];
NSURLConnection *theConnection=[[NSURLConnection alloc] initWithRequest:request delegate:self];
if (theConnection) {
receiveData = [NSMutableData data];
}
seen here https://stackoverflow.com/a/6149088/1317080
Try the below code it is one of the simple ways to consume a web service(json)
NSURL *url = [NSURL URLWithString:#"yourURL"];
NSMutableURLRequest *urlReq=[NSMutableURLRequest requestWithURL:url];
NSURLResponse *response;
NSError *error = nil;
NSData *receivedData = [NSURLConnection sendSynchronousRequest:urlReq
returningResponse:&response
error:&error];
if(error!=nil)
{
NSLog(#"web service error:%#",error);
}
else
{
if(receivedData !=nil)
{
NSError *Jerror = nil;
NSDictionary* json =[NSJSONSerialization
JSONObjectWithData:receivedData
options:kNilOptions
error:&Jerror];
if(Jerror!=nil)
{
NSLog(#"json error:%#",Jerror);
}
}
}
Hope this helps.
In my application I want to use the NSURLConnection class. So please tell me how to use this one? This contain the lot of delegate methods, please tell me how to use them?
Initiate the connection using
self.responseData = [NSMutableData data];
NSURL *url = [NSURL URLWithString:#"http://sampleurl/"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
[connection autorelease];
and you can catch the response in the connectionDidFinishLoading delegate method
#pragma mark - NSURLConnection Delegate Methods
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
[self.responseData setLength:0];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
[self.responseData appendData:data];
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
NSLog(#"Connection failed: %#", [error description]);
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
//Getting your response string
NSString *responseString = [[NSString alloc] initWithData:self.responseData encoding:NSUTF8StringEncoding];
self.responseData = nil;
}
For your memory leak problem
Declare the response data in interface file
NSMutableData *_responseData;
with property as below
#property (nonatomic, retain) NSMutableData *responseData;
and synthesize it
#synthesize responseData = _responseData;
Dont release it anywhere (We have used convenient constructors for allocation). We have already set it to nil in connectionDidFinishLoading method.
In iOS 5 and OS X 10.7 or later you can load data asynchronously using the following:
NSURL *url = [NSURL URLWithString:#"http://sampleurl/"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue currentQueue]
completionHandler: ^(NSURLResponse * response, NSData * data, NSError * error) {
NSHTTPURLResponse * httpResponse = (NSHTTPURLResponse*)response;
if(httpResponse.statusCode == 200) {
//your code to handle the data
}
}
];
Or if you want to do it synchronously (not recommended if you are loading large data as it will hang the application) (available in OS X 10.2+ and iOS 2.0+)
NSURL *url = [NSURL URLWithString:#"http://sampleurl/"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
NSURLResponse * response;
NSError * error;
NSData * data = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];