My iphone app called Google Local Search(non javascript version) to behave some search business.
Below is my code to form a url:
NSString *url = [NSString stringWithFormat:#"http://ajax.googleapis.com/ajax/services/search/local?v=1.0&q=%#", keyword];
NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
[request setURL:[NSURL URLWithString:url]];
[request setHTTPMethod:#"GET"];
//get response
NSHTTPURLResponse* urlResponse = nil;
NSError *error = [[[NSError alloc] init] autorelease];
NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&urlResponse error:&error];
NSString *result = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];
When the keyword refers to english characters, it works fine, but when refers to chinese characters(encoded in UTF8, such as '天安门' whose UTF8 code is 'e5a4a9 e5ae89 e997a8'), it will report NSURLErrorBadURL error(-1000, Returned when a URL is sufficiently malformed that a URL request cannot be initiated). Why?
Then I carry out further investigation, I use Safari and type in the url below:
http://ajax.googleapis.com/ajax/services/search/local?v=1.0&q=天安门
It also works, and the output I got from Macsniffer is:
/ajax/services/search/local?v=1.0&q=%E5%A4%A9%E5%AE%89%E9%97%A8
So I write a testing url directly in my app
NSString *url = [NSString stringWithFormat:#"http://ajax.googleapis.com/ajax/services/search/local?v=1.0&q=%E5%A4%A9%E5%AE%89%E9%97%A8"];
And what I got from the Macsniffer is some other thing:
/ajax/services/search/local?v=1.0&q=1.687891E-28750X1.417C0001416CP-102640X1.4CC2D04648FBP-9999-1.989891E+0050X1.20DC00184CC67P-953E8E99A8
It seems my keyword "%E5%A4%A9%E5%AE%89%E9%97%A8" was translated into something else. So how can I form a valid url? I do need help!
Have you tried encoding the search string:
NSString* escapedKeyword = [keyword stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding];
Related
Alright, so here's where I'm at with my app.
I've got some code that connects to a remote server and grabs some XML data, and forms it into a string. Here is the code below:
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:#"GET"];
NSString *accept = [NSString stringWithFormat:#"application/xml"];
[request addValue:accept forHTTPHeaderField: #"Accept"];
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSString* responseString = [[NSString alloc] initWithData:returnData encoding: NSUTF8StringEncoding];
NSLog(#"%#",responseString);
Which returns
That's exactly the information I want. My question is how I can get the double value out of the gold brackets and into my application to use.
Thanks a lot!
There are a lot of tutorials of how to use NSXMLParser. For example, ray wenderlich or here and here.
There's quite a few XML parsing options available - ranging from libxml2, to NSXMLParser and a host of open-source projects.
One of my favorite XML parsers is RaptureXML, which can be installed via CocoaPods.
I like to create a category on RXMLElement to parse as follows:
- (PFCurrentConditions*)asCurrentCondition
{
NSString* summary = [[self child:#"weatherDesc"] text];
PFTemperature* temp = [PFTemperature temperatureWithFahrenheitString:[[self child:#"temp_F"] text]];
NSString* humidity = [[self child:#"humidity"] text];
NSString* wind =
[NSString stringWithFormat:#"Wind: %# km %#", [[self child:#"windspeedKmph"] text], [[self child:#"winddir16Point"] text]];
NSString* imageUri = [[self child:#"weatherIconUrl"] text];
return [PFCurrentConditions conditionsWithSummary:summary temperature:temp humidity:humidity wind:wind imageUrl:imageUri];
}
So, you can then use it as follows:
RXMLElement* rootElement = [RXMLElement elementFromXMLData:response.responseData];
__autoreleasing PFWeatherReport* weatherReport = [rootElement asWeatherReport];
Again, this is one of countless options, but my personal favorite.
I am new to iOS, so if any help it will be appreciated.
I am trying to get the longitude and latitude from address, earlier the code was working fine but now the JSON data are coming null.
Here my sample code,
url = [NSString stringWithFormat:#"http://maps.google.com/maps/api/geocode/json?address=%#&sensor=false",appDelegate.sAddress];
url=[url stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSLog(#"Address URL: %#",url);
//Formulate the string as a URL object.
NSURL *requestURL=[NSURL URLWithString:url];
NSData* data = [NSData dataWithContentsOfURL: requestURL];
NSString *returnString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(#"my Coordinate : %#",returnString);
NSError* error;
NSDictionary* json = [NSJSONSerialization
JSONObjectWithData:data
options:kNilOptions
error:&error];
But i am getting the output as null.
So please help me out.
Thanks!
Thanks for your replies that all make me learn a lots.
As one of my friend just tell me the solution so i am sharing with you.
Here is the code,
url = [NSString stringWithFormat:#"http://maps.google.com/maps/api/geocode/json?address=%#&sensor=false",appDelegate.sAddress];
url=[url stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSLog(#"Address URL: %#",url);
//Formulate the string as a URL object.
NSURL *requestURL=[NSURL URLWithString:url];
NSData* data = [NSData dataWithContentsOfURL: requestURL];
NSString *returnString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
SBJSON *parser = [[SBJSON alloc] init];
NSDictionary *locationResult = [parser objectWithString:returnString];
//[reverseGeoString copy]`
And its working fine.
But still there is a question that why this happen.As earlier that code is working fine but it suddenly stopped working.
You must construct your returnString in the following method that actually receives the data:
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
Check out this for additional information on how to use NSURLConnection and the delegate methods.
I would say you're missing the all-important "REQUEST"...
This is what I do. Hope it helps:
NSString *encodedAddress = (__bridge_transfer NSString *) CFURLCreateStringByAddingPercentEscapes(NULL, (__bridge_retained CFStringRef)searchBar.text, NULL, (CFStringRef) #"!*'();:#&=+$,/?%#[]",kCFStringEncodingUTF8 );
NSString* searchURL = [NSString stringWithFormat:#"http://maps.googleapis.com/maps/api/geocode/json?address=%#&sensor=true",encodedAddress];
NSError* error = nil;
NSURLResponse* response = nil;
NSMutableURLRequest* request = [[NSMutableURLRequest alloc] init];
NSURL* URL = [NSURL URLWithString:searchURL];
[request setURL:URL];
[request setCachePolicy:NSURLRequestReloadIgnoringLocalCacheData];
[request setTimeoutInterval:30];
NSData* data = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
if (error){
NSLog(#"Error performing request %#", searchURL);
return;
}
NSString *jsonString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
if (jsonString!=nil){
NSLog(#"%#",jsonString);
}
when I run the following google translation API URL http://translate.google.com/translate_a/t?client=t&text=Hello&langpair=en|fr it returns the correct result.
However, when I try to use the following in Xcode it returns (Null). I would appreciate any help or insight you can provide.
NSString *urlPath = [NSString stringWithFormat:#"/translate_a/t?client=t&text=%#&langpair=en|fr",#"Hello"];
NSURL *url = [[NSURL alloc] initWithScheme:#"http" host:#"translate.google.com" path:urlPath];
NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
[request setURL:url];
[request setHTTPMethod:#"GET"];
NSURLResponse *response;
NSError *error;
NSData *data;
data = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
NSString *result = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSLog(#"Text: %#",result);
Your encoding is incorrect. change it to NSASCIIStringEncoding.
I just fixed your code and ran it locally and it worked like a charm...
here are the results
[[["Bonjour","Hello","",""]],[["interjection",["bonjour","salut","all\u00f4","tiens"]]],"en",,[["Bonjour",[5],1,0,1000,0,1,0]],[["Hello",4,,,""],["Hello",5,[["Bonjour",1000,1,0]],[[0,5]],"Hello"]],,,[],1]
I am trying to use initWithContentsOfURL:encoding:error: like this :
NSURL *url = [[NSURL alloc] initWithString:#"http://my_url.com/my_file.xml"];
NSError *error = nil;
NSString *my_string = [[NSString alloc] initWithContentsOfURL:url
encoding:NSUTF8StringEncoding
error:&error];
I get a empty my_string variable.
I tried the initWithContentsOfURL: method (which is deprecated in iOS 2.0) and I get the content of my page. But I still need to specify a encoding language.
What's wrong ?
Thanks :)
the encoding of your file is probably not UTF8.
If you don't know the encoding of your file, you could try this method:
- (id)initWithContentsOfURL:(NSURL *)url usedEncoding:(NSStringEncoding *)enc error:(NSError **)error
you have to pass a pointer to a NSStringEncoding, like you did with error.:
NSURL *url = [[NSURL alloc] initWithString:#"http://my_url.com/my_file.xml"];
NSError *error = nil;
NSStringEncoding encoding;
//NSString *my_string = [[NSString alloc] initWithContentsOfURL:url
// encoding:NSUTF8StringEncoding
// error:&error];
NSString *my_string = [[NSString alloc] initWithContentsOfURL:url
usedEncoding:&encoding
error:&error];
after this your encoding is present in the encoding variable. If you are not interested in the used encoding, I guess you could pass NULL as pointer as well.
Why not use a request and connection to get the info back in an NSData object? Something like this:
NSURL *url = [[NSURL alloc] initWithString:#"http://my_url.com/my_file.xml"];
NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
[request setURL:url];
[request setHTTPMethod:#"GET"];
NSURLConnection *conn = [[NSURLConnection alloc]initWithRequest:request delegate:self];
[conn start];
if(conn){
// Data Received
responseData = [[NSMutableData alloc] init];
}
and then in your connection:didRecieveData delegate method, put something like this
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
[self.responseData appendData:data];
}
and then once the connection is finished loading convert the data to a string:
- (void)connectionDidFinishLoading:(NSURLConnection *)connection{
NSString *string = [[NSString alloc] initWithData:responseData encoding:NSASCIIStringEncoding];
}
Not the most straightforward method, but that should get you your XML string. Also if you need to parse the XML once you get it back, you can directly pass the responseData to an NSXMLParser without any conversion. :)
You can modify your webpage by adding header('Content-Type: text/html; charset=UTF-8'); to the top of the code and saving the document as a UTF-8 formated file. It helped me as I had the same problem.
I have a piece of NSString that will read "Test & Test" or with "
Is there any way without searching and replacing to make that display as "&" or """ ??
Can you try this ?
NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
[request setURL:[NSURL URLWithString:[NSString stringWithFormat:#"http://www.mypage.com/content.html"]]];
[request setHTTPMethod:#"GET"];
NSHTTPURLResponse* authResponse;
NSError* authError;
NSData * authData = [NSURLConnection sendSynchronousRequest:request returningResponse:&authResponse error:&authError];
NSString *authResponseBody = [[NSString alloc] initWithData:authData encoding:NSUTF8StringEncoding];
NSLog(#" Nice Result: %#", authResponseBody);
Adrian
CFXMLCreateStringByUnescapingEntities should do it. Thanks to the magic of toll free bridging you can just use your NSString.
The html string you read is bad formated.
Try to read as UTF-8 or any other formatting in order to get the correct text from the html you're reading.
Can you actually post the code where you read the NSString from the HTML content ?