This question already has answers here:
how do I check an http request response status code from iOS?
(2 answers)
Closed 9 years ago.
I have a working http GET without using any third party bits, I am new to iOS so this was a struggle to setup initially. My code looks like:
-(NSString *) SendGetRequestToRest:(NSString *)urlEndString
{
NSString *userName = #"userN";
NSString *password = #"PassW";
NSString *urlBaseString = #"http://someurl.co.uk/";
NSString *urlString = [NSString stringWithFormat:#"%#%#", urlBaseString, urlEndString];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:#"GET"];
NSString *str1 = [NSString stringWithFormat:#"%#:%#", userName, password];
NSString *encodedString = [self stringByBase64EncodingWithString:str1];
[request addValue:[NSString stringWithFormat:#"Basic %#",encodedString] forHTTPHeaderField:#"Authorization"];
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSString *str = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
NSLog(#"str: %#", str);
return str;
}
What I need to do is track when the status code of the http GET is not a nice 200, I saw How to check status of web server in iOS? and this looks promising i.e. add this:
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSHTTPURLResponse *)response
{
if ([response statusCode] == 404)
{
/// do some stuff
}
}
But I cant see how to connect this up to
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
as it doesnt accept a delegate?
You can use returningResponse parameter to get "response":
NSHTTPURLResponse *response = nil;
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:nil];
if ([response statusCode] == 404)
{
// Do whatever you want to do after getting response
}
Related
I have this link :
function new_message($chat_id,$user_id,$message,$recipient_ids)
http://www.demii.com/demo/dooponz/admin/index.php/chat/new_message/4/1/you/2%2C7
return chat_log_id
Can anyone please explain me how to call webserive by this get method or give me the
solution .
what i did with my code is below :
-(void)newMessage{
if ([self connectedToWiFi]){
NSString *urlString = [NSString stringWithFormat:#"www.demii.com/demo/dooponz/admin/index.php/chat/new_message/4/1/you/1,1,2"];
NSLog(#"urlString is %#", urlString);
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
NSURL *requestURL = [NSURL URLWithString:urlString];
[request setURL:requestURL];
[request setHTTPMethod:#"POST"];
[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue]
completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {
NSLog(#"ERROR = %#",error.localizedDescription);
if(error.localizedDescription == NULL)
{
NSString *returnString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(#"response >>>>>>>>> succ %#",returnString);
[delegate ConnectionDidFinishLoading:returnString : #"newMessage"];
}
else
{
NSString *returnString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(#"response >>>>>>>>> fail %#",returnString);
[delegate ConnectiondidFailWithError:returnString : #"newMessage"];
}
}];
}
}
how can i handle this ?
Thanks in advance .
I am not sure from your post whether or not you want to "post" or "get." However, gauging from the fact that you set your method to post, and that you are creating something new on your server, I am assuming you want to post.
If you want to post you can use my wrapper method for a post request.
+ (NSData *) myPostRequest: (NSString *) requestString withURL: (NSURL *) url{
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:#"POST"];
[request setTimeoutInterval:15.0];
NSData *requestBody = [requestString dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
[request setHTTPBody:requestBody];
NSURLResponse *response = NULL;
NSError *requestError = NULL;
NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&requestError];
return responseData;
}
Where request string is formatted like this:
NSString * requestString = [[NSString alloc] initWithFormat:#"username=%#&password=%#", userInfo[#"username"], userInfo[#"password"]];
This will also shoot back the response data which you can turn into a string like this.
responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
If you are trying to grab data from the server in json format...
+ (NSArray *) myGetRequest: (NSURL *) url{
NSArray *json = [[NSArray alloc] init];
NSData* data = [NSData dataWithContentsOfURL:
url];
NSError *error;
if (data)
json = [[NSArray alloc] initWithArray:[NSJSONSerialization
JSONObjectWithData:data
options:kNilOptions
error:&error]];
//NSLog(#"get results: \n %#", json);
return json;
}
Pls change ur code like this
-(void)newMessage{
NSString *urlString = [NSString stringWithFormat:#"http://www.demii.com/demo/dooponz/admin/index.php/chat/new_message/4/1/you/27" ];
NSLog(#"urlString is %#", urlString);
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
NSURL *requestURL = [NSURL URLWithString:urlString];
[request setURL:requestURL];
[request setHTTPMethod:#"POST"];
[NSURLConnection sendAsynchronousRequest:request queue:[NSOperationQueue mainQueue]
completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {
NSLog(#"ERROR = %#",error.localizedDescription);
if(error.localizedDescription == NULL)
{
NSString *returnString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(#"response >>>>>>>>> succ %#",returnString);
[self parseStringtoJSON:data];
//[delegate ConnectionDidFinishLoading:returnString : #"newMessage"];
}
else
{
NSString *returnString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(#"response >>>>>>>>> fail %#",returnString);
// [delegate ConnectiondidFailWithError:returnString : #"newMessage"];
}
}];
}
-(void)parseStringtoJSON:(NSData *)data{
NSDictionary *dict=[NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil];
NSLog(#"chat id %#",[dict objectForKey:#"chat_log_id"]);
}
u will get the JSON response string as result if u hit that url. If u r familiar with json parsing, u can get the value based on key.
see this link: How do I deserialize a JSON string into an NSDictionary? (For iOS 5+)
Hi I would like to know how I can go about sending data from 4 UITextField's to a PHP script on a website using NSURLConnection or JSon. Whatever is easier, how can I do this exactly?
Thanks in advance!
Easiest way (synchronous)
NSString strForTextField1 = textField1.text;
NSString strForTextField2 = textField1.text;
NSString strForTextField3 = textField1.text;
NSString strForTextField4 = textField1.text;
//Build the request
NSString *stringOfRequest = [NSString stringWithFormat:#"www.yourserver.com?var1=%#&var2=%#&var3=%#&var4=%#", strForTextField1, strForTextField2, strForTextField3, strForTextField4];
NSURL *url = [NSURL URLWithString:stringOfRequest];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
NSURLResponse *response;
NSError *error;
//send it synchronous
NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
if(!error)
{
//log response
NSLog(#"Response from server = %#", responseString);
}
When i press login in my app, it logs in twice in API instead of just once.., there is something wrong with this but i cant find what, because it just execute this code once.
NSUserDefaults *defaults =[NSUserDefaults standardUserDefaults];
NSHTTPURLResponse * response;
NSError * error;
NSMutableURLRequest * request;
NSString * params;
NSString *urlAddress = [NSString stringWithFormat:#"%#/?action=request&api=json&module=ManagementModule&function=startSession&instance=0",[ConnectServer returnserverip]];
NSLog(#"UPX %#",[ConnectServer returnserverip]);
NSLog(#"IP %#",[ConnectServer returnclientip]);
if([defaults boolForKey:#"enablePincode"]){
NSString *account = [defaults stringForKey:#"myAccount"];
NSString *username =[defaults stringForKey:#"myUsername"];
NSString *password = [defaults stringForKey:#"myPassword"];
NSString *clientip = [ConnectServer returnclientip];
NSString *clientname = [ConnectServer returnclientname];
params = [[[NSString alloc] initWithFormat:#"params=&auth[password]=%#&auth[mode]=%#&auth[account]=%#&auth[user]=%#&auth[rights]=%#&auth[user_ip]=%#&auth[client_name]=%#",password,#"password",account,username,#"user",clientip,clientname] autorelease];
}
else {
NSString *clientip = [ConnectServer returnclientip];
NSString *clientname = [ConnectServer returnclientname];
params = [[[NSString alloc] initWithFormat:#"params=&auth[password]=%#&auth[mode]=%#&auth[account]=%#&auth[user]=%#&auth[rights]=%#&auth[user_ip]=%#&auth[client_name]=%#",[myPassword text],#"password",[myAccount text],[myUsername text],#"user",clientip,clientname] autorelease];
}
request = [[[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:urlAddress] cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:60] autorelease];
NSData *myRequestData = [params dataUsingEncoding:NSUTF8StringEncoding];
[NSURLRequest setAllowsAnyHTTPSCertificate:YES forHost:[[NSURL URLWithString: urlAddress] host]];
[request setHTTPMethod:#"POST"];
[request setHTTPBody:myRequestData];
[request setValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Accept"];
[request setValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Content-Type"];
[request setValue:[NSString stringWithFormat:#"%d", [myRequestData length]] forHTTPHeaderField:#"Content-Length"];
[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSLog(#"RESPONSE HEADERS: \n%#", [response allHeaderFields]);
request.URL = [NSURL URLWithString:urlAddress];
error = nil;
response = nil;
NSData * data = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSLog(#"The server saw:\n%#", [[[NSString alloc] initWithData:data encoding: NSASCIIStringEncoding] autorelease]);
NSLog(#"Parameters: %#", params);
NSLog(#"Actual sended parameters to the server: %#", myRequestData);
NSString *Sresponse;
Sresponse = [[[NSString alloc] initWithData:data encoding: NSASCIIStringEncoding] autorelease];
There are two requests in the code:
[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
and five lines down
NSData * data = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
Hint: In cases like this use wireshark or my favorite Charles which will decode SSL connections.
I guess it is possible. I mean, I am running APEX at this very moment and I have the same app. running in 3 different windows under the same user without having to log on. The only time I have to log on is when I change user.
So yes, it is possible, but not sure why it is not working at your end. Could it be that you run both development and runtime at the same time using different users? Because if one of the APEX users differs from the other then you are prompted to log on again with the other user.
I'm new to objective-c and I'm starting to put a great deal of effort into request/response as of recent. I have a working example that can call a url (via http GET) and parse the json returned.
The working example of this is below
- (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([NSString stringWithFormat:#"Connection failed: %#", [error description]]);
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
[connection release];
//do something with the json that comes back ... (the fun part)
}
- (void)viewDidLoad
{
[self searchForStuff:#"iPhone"];
}
-(void)searchForStuff:(NSString *)text
{
responseData = [[NSMutableData data] retain];
NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:#"http://www.whatever.com/json"]];
[[NSURLConnection alloc] initWithRequest:request delegate:self];
}
My first question is - will this approach scale up? Or is this not async (meaning I block the UI thread while the app is waiting for the response)
My second question is - how might I modify the request part of this to do a POST instead of GET? Is it simply to modify the HttpMethod like so?
[request setHTTPMethod:#"POST"];
And finally - how do I add a set of json data to this post as a simple string (for example)
{
"magic":{
"real":true
},
"options":{
"happy":true,
"joy":true,
"joy2":true
},
"key":"123"
}
Thank you in advance
Here's what I do (please note that the JSON going to my server needs to be a dictionary with one value (another dictionary) for key = question..i.e. {:question => { dictionary } } ):
NSArray *objects = [NSArray arrayWithObjects:[[NSUserDefaults standardUserDefaults]valueForKey:#"StoreNickName"],
[[UIDevice currentDevice] uniqueIdentifier], [dict objectForKey:#"user_question"], nil];
NSArray *keys = [NSArray arrayWithObjects:#"nick_name", #"UDID", #"user_question", nil];
NSDictionary *questionDict = [NSDictionary dictionaryWithObjects:objects forKeys:keys];
NSDictionary *jsonDict = [NSDictionary dictionaryWithObject:questionDict forKey:#"question"];
NSString *jsonRequest = [jsonDict JSONRepresentation];
NSLog(#"jsonRequest is %#", jsonRequest);
NSURL *url = [NSURL URLWithString:#"https://xxxxxxx.com/questions"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url
cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
NSData *requestData = [jsonRequest dataUsingEncoding:NSUTF8StringEncoding];
[request setHTTPMethod:#"POST"];
[request setValue:#"application/json" forHTTPHeaderField:#"Accept"];
[request setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
[request setValue:[NSString stringWithFormat:#"%d", [requestData length]] forHTTPHeaderField:#"Content-Length"];
[request setHTTPBody: requestData];
NSURLConnection *connection = [[NSURLConnection alloc]initWithRequest:request delegate:self];
if (connection) {
receivedData = [[NSMutableData data] retain];
}
The receivedData is then handled by:
NSString *jsonString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSDictionary *jsonDict = [jsonString JSONValue];
NSDictionary *question = [jsonDict objectForKey:#"question"];
This isn't 100% clear and will take some re-reading, but everything should be here to get you started. And from what I can tell, this is asynchronous. My UI is not locked up while these calls are made.
I struggled with this for a while. Running PHP on the server. This code will post a json and get the json reply from the server
NSURL *url = [NSURL URLWithString:#"http://example.co/index.php"];
NSMutableURLRequest *rq = [NSMutableURLRequest requestWithURL:url];
[rq setHTTPMethod:#"POST"];
NSString *post = [NSString stringWithFormat:#"command1=c1&command2=c2"];
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding];
[rq setHTTPBody:postData];
[rq setValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Content-Type"];
NSOperationQueue *queue = [[NSOperationQueue alloc] init];
[NSURLConnection sendAsynchronousRequest:rq queue:queue completionHandler:^(NSURLResponse *response, NSData *data, NSError *error)
{
if ([data length] > 0 && error == nil){
NSError *parseError = nil;
NSDictionary *dictionary = [NSJSONSerialization JSONObjectWithData:data options:0 error:&parseError];
NSLog(#"Server Response (we want to see a 200 return code) %#",response);
NSLog(#"dictionary %#",dictionary);
}
else if ([data length] == 0 && error == nil){
NSLog(#"no data returned");
//no data, but tried
}
else if (error != nil)
{
NSLog(#"there was a download error");
//couldn't download
}
}];
I would suggest to use ASIHTTPRequest
ASIHTTPRequest is an easy to use
wrapper around the CFNetwork API that
makes some of the more tedious aspects
of communicating with web servers
easier. It is written in Objective-C
and works in both Mac OS X and iPhone
applications.
It is suitable performing basic HTTP
requests and interacting with
REST-based services (GET / POST / PUT
/ DELETE). The included
ASIFormDataRequest subclass makes it
easy to submit POST data and files
using multipart/form-data.
Please note, that the original author discontinued with this project. See the followring post for reasons and alternatives: http://allseeing-i.com/%5Brequest_release%5D;
Personally I am a big fan of AFNetworking
Most of you already know this by now, but I am posting this, just incase, some of you are still struggling with JSON in iOS6+.
In iOS6 and later, we have the NSJSONSerialization Class that is fast and has no dependency on including "outside" libraries.
NSDictionary *result = [NSJSONSerialization JSONObjectWithData:[resultStr dataUsingEncoding:NSUTF8StringEncoding] options:0 error:nil];
This is the way iOS6 and later can now parse JSON efficiently.The use of SBJson is also pre-ARC implementation and brings with it those issues too if you are working in an ARC environment.
I hope this helps!
Here is a great article using Restkit
It explains on serializing nested data into JSON and attaching the data to a HTTP POST request.
Since my edit to Mike G's answer to modernize the code was rejected 3 to 2 as
This edit was intended to address the author of the post and makes no
sense as an edit. It should have been written as a comment or an
answer
I'm reposting my edit as a separate answer here. This edit removes the JSONRepresentation dependency with NSJSONSerialization as Rob's comment with 15 upvotes suggests.
NSArray *objects = [NSArray arrayWithObjects:[[NSUserDefaults standardUserDefaults]valueForKey:#"StoreNickName"],
[[UIDevice currentDevice] uniqueIdentifier], [dict objectForKey:#"user_question"], nil];
NSArray *keys = [NSArray arrayWithObjects:#"nick_name", #"UDID", #"user_question", nil];
NSDictionary *questionDict = [NSDictionary dictionaryWithObjects:objects forKeys:keys];
NSDictionary *jsonDict = [NSDictionary dictionaryWithObject:questionDict forKey:#"question"];
NSLog(#"jsonRequest is %#", jsonRequest);
NSURL *url = [NSURL URLWithString:#"https://xxxxxxx.com/questions"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url
cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
NSData *requestData = [NSJSONSerialization dataWithJSONObject:dict options:0 error:nil]; //TODO handle error
[request setHTTPMethod:#"POST"];
[request setValue:#"application/json" forHTTPHeaderField:#"Accept"];
[request setValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
[request setValue:[NSString stringWithFormat:#"%d", [requestData length]] forHTTPHeaderField:#"Content-Length"];
[request setHTTPBody: requestData];
NSURLConnection *connection = [[NSURLConnection alloc]initWithRequest:request delegate:self];
if (connection) {
receivedData = [[NSMutableData data] retain];
}
The receivedData is then handled by:
NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
NSDictionary *question = [jsonDict objectForKey:#"question"];
Here's an updated example that is using NSURLConnection +sendAsynchronousRequest: (10.7+, iOS 5+), The "Post" request remains the same as with the accepted answer and is omitted here for the sake of clarity:
NSURL *apiURL = [NSURL URLWithString:
[NSString stringWithFormat:#"http://www.myserver.com/api/api.php?request=%#", #"someRequest"]];
NSURLRequest *request = [NSURLRequest requestWithURL:apiURL]; // this is using GET, for POST examples see the other answers here on this page
[NSURLConnection sendAsynchronousRequest:request
queue:[NSOperationQueue mainQueue]
completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
if(data.length) {
NSString *responseString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
if(responseString && responseString.length) {
NSLog(#"%#", responseString);
}
}
}];
You can try this code for send json string
NSData *jsonData = [NSJSONSerialization dataWithJSONObject:ARRAY_CONTAIN_JSON_STRING options:NSJSONWritin*emphasized text*gPrettyPrinted error:NULL];
NSString *jsonString = [[NSString alloc] initWithData:jsonData encoding:NSUTF8StringEncoding];
NSString *WS_test = [NSString stringWithFormat:#"www.test.com?xyz.php¶m=%#",jsonString];
I'm trying to make a MJPEG viewer in Objective C but I'm having a bunch of issues with it.
First off, I'm using AsyncSocket(http://code.google.com/p/cocoaasyncsocket/) which lets me connect to the host.
Here's what I got so far
NSLog(#"Ready");
asyncSocket = [[AsyncSocket alloc] initWithDelegate:self];
//http://kamera5.vfp.slu.se/axis-cgi/mjpg/video.cgi
NSError *err = nil;
if(![asyncSocket connectToHost:#"kamera5.vfp.slu.se" onPort:80 error:&err])
{
NSLog(#"Error: %#", err);
}
then in the didConnectToHost method:
- (void)onSocket:(AsyncSocket *)sock didConnectToHost:(NSString *)host port:(UInt16)port{
NSLog(#"Accepted client %#:%hu", host, port);
NSString *urlString = [NSString stringWithFormat:#"http://kamera5.vfp.slu.se/axis-cgi/mjpg/video.cgi"];
NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:#"GET"];
//set headers
NSString *_host = [NSString stringWithFormat:host];
[request addValue:_host forHTTPHeaderField: #"Host"];
NSString *KeepAlive = [NSString stringWithFormat:#"300"];
[request addValue:KeepAlive forHTTPHeaderField: #"Keep-Alive"];
NSString *connection = [NSString stringWithFormat:#"keep-alive"];
[request addValue:connection forHTTPHeaderField: #"Connection"];
//get response
NSHTTPURLResponse* urlResponse = nil;
NSError *error = [[NSError alloc] init];
NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&urlResponse error:&error];
NSString *result = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
NSLog(#"Response Code: %d", [urlResponse statusCode]);
if ([urlResponse statusCode] >= 200 && [urlResponse statusCode] < 300) {
NSLog(#"Response: %#", result);
//here you get the response
}
}
This calls the MJPEG stream, but it doesn't call it to get more data. What I think its doing is just loading the first chunk of data, then disconnecting.
Am I doing this totally wrong or is there light at the end of this tunnel?
Thanks!
Try loading the mjpeg in a UiWebView, it should be able to play it natively.
Assuming you have a UiWebView called "myWebView", something like this should work:
NSURLRequest* urlRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:#"http://kamera5.vfp.slu.se/axis-cgi/mjpg/video.cgi"]];
[myWebView loadRequest:urlRequest];
I hope that helps!
the main problem is that webkit never relase the data, so after a while it explode.
That would probably best be done with JavaScript since there isn't a good way to communicate with UIWebView otherwise.