HTTP request objective c - objective-c

Question

I am trying to make a HTTP request in this way:
NSString *urlString = [NSString stringWithFormat:#"https://api.dropbox.com/1/oauth/request_token"];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:#"POST"];
//set headers
NSString *contentType = [NSString stringWithFormat:#"text/xml"];
[request addValue:contentType forHTTPHeaderField: #"Content-Type"];
oauth_version="1.0"
oauth_signature_method="PLAINTEXT"
oauth_consumer_key="<app-key>"
oauth_signature="<app-secret>&"
//create the body
NSMutableData *postBody = [NSMutableData data];
[postBody appendData:[[NSString stringWithFormat:#"<xml>"] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[[NSString stringWithFormat:#"<yourcode/>"] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[[NSString stringWithFormat:#"</xml>"] dataUsingEncoding:NSUTF8StringEncoding]];
//post
[request setHTTPBody:postBody];
//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
}
I am trying to make the request with these headers:
Authorization: OAuth oauth_version="1.0", oauth_signature_method="PLAINTEXT", oauth_consumer_key="<app-key>", oauth_signature="<app-secret>&"
But I can't understand how to. PLease help!!

Answer 1

The authorization in your case is just a HTTP header. So it's:
[request addValue:#"OAuth oauth_version=\"1.0\", oauth_signature_method=\"PLAINTEXT\", oauth_consumer_key=\"<app-key>\", oauth_signature=\"<app-secret>&\"" forHTTPHeaderField: #"Authorization"];
Or:
NSString* oauth_version=#"1.0";
NSString* oauth_signature_method=#"PLAINTEXT";
NSString* oauth_consumer_key=#"<app-key>";
NSString* oauth_signature=#"<app-secret>&";
NSString* authHeader = [NSString stringWithFormat: #"OAuth oauth_version=\"%#\", oauth_signature_method=\"%#\", oauth_consumer_key=\"%#\", oauth_signature=\"%#\"",
oauth_version, oauth_signature_method, oauth_consumer_key, oauth_signature];

Answer 2

Try commenting all this
//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
//}
and use this instead of all above
NSURLConnection *conn = [NSURLConnection connectionWithRequest:request delegate:self];
Implement these delegate functions
Note - self.data is NSMUtableData object declared as data in header.
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
[self.data setLength:0];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)d {
[self.data appendData:d];
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
[[[[UIAlertView alloc] initWithTitle:NSLocalizedString(#"Error", #"")
message:[error localizedDescription]
delegate:nil
cancelButtonTitle:NSLocalizedString(#"OK", #"")
otherButtonTitles:nil] autorelease] show];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection {
NSString *responseText = [[NSString alloc] initWithData:self.data encoding:NSUTF8StringEncoding];
// Do anything you want with it
[responseText release];
}
// Handle basic authentication challenge if needed
- (void)connection:(NSURLConnection *)connection didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge {
//I'm using HTTP Digest Authentication in your case it could be different
NSURLCredential *credential = [NSURLCredential credentialWithUser:HTTP_DIGEST_USER
password:HTTP_DIGEST_PASSWORD
persistence:NSURLCredentialPersistenceForSession];
[[challenge sender] useCredential:credential forAuthenticationChallenge:challenge];
}
Hope it will help

Answer 3

This error occurs when your are passing wrong bundle or document directory path to media.
Just simply verify your media path to the HTTP request body.