Error while trying to access Google translate with NSURL - objective-c

Question

If I try this code:
NSError *err = nil;
NSString *resp = [NSString stringWithContentsOfURL:[NSURL URLWithString:#"https://ajax.googleapis.com/ajax/services/language/translate?v=1.0&q=abdicate&langpair=en|es"]
encoding:NSASCIIStringEncoding
error:&err];
Err contains the following message: Error Domain=NSCocoaErrorDomain Code=258 UserInfo=0x1001166d0 "The file name is invalid."
Anybody knows what this means? If I try the url on a browser, it works fine.

Answer 1

(Using NSData) you can just replace the 1.0 with 1%2E0 and the | with %7C. It is possible that with the period is being interpreted as a file with an extension, thus the 258 error (From Foundation Constants Reference):
NSError Codes
NSError codes in the Cocoa error domain.
enum {
...
NSFileReadInvalidFileNameError = 258,
}
NSFileReadInvalidFileNameError:
Read error because of an invalid file
name Available in Mac OS X v10.4 and later. Declared in
FoundationErrors.h.
Try this:
- (void)viewDidLoad {
[super viewDidLoad];
NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:#"https://ajax.googleapis.com/ajax/services/language/translate?v=1%2E0&q=abdicate&langpair=en%7Ces"]];
if (data) {
NSLog([[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding]);
}
}
Gives the output:
2011-09-27 15:38:05.691 Project[44290:fb03] {"responseData": {"translatedText":"abdicar"}, "responseDetails": null, "responseStatus": 200}
Which is the same as what you get by navigating to the url https://ajax.googleapis.com/ajax/services/language/translate?v=1.0&q=abdicate&langpair=en|es in a browser.
Try using NSData, then converting to a string, like so:
NSString *result;
NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:[NSString stringWithFormat:#"https://ajax.googleapis.com/ajax/services/language/translate?%#", [self urlencode:#"v=1.0&q=abdicate&langpair=en|es"]]]];
if (data) {
result = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
} else {
// Do something
}
This is the urlencode method used above:
- (NSString *)urlencode:(NSString *)str {
NSMutableString *output = [NSMutableString string];
const unsigned char *source = (const unsigned char *)[str UTF8String];
int sourceLen = strlen((const char *)source);
for (int i = 0; i < sourceLen; ++i) {
const unsigned char thisChar = source[i];
if (thisChar == ' '){
[output appendString:#"+"];
} else if (thisChar == '.' || thisChar == '-' || thisChar == '_' || thisChar == '~' ||
(thisChar >= 'a' && thisChar <= 'z') ||
(thisChar >= 'A' && thisChar <= 'Z') ||
(thisChar >= '0' && thisChar <= '9')) {
[output appendFormat:#"%c", thisChar];
} else {
[output appendFormat:#"%%%02X", thisChar];
}
}
return output;
}
This whole part was unnecessary, just need to replace the 1.0 and | instead of encoding the entire url.