How do I send the data I have in my sqlite database to the server with HTTP and JSON

问题

I'm storing id,lat,lng, and timestamp in sqlite and now need to send it in an JSON object to the server.

Here's where I'm inserting the data.

NSString *insertStatement = [NSString stringWithFormat:@"INSERT INTO location (latitude, longitude, timeStamp) VALUES (%g, %g, %@)",newLocation.coordinate.latitude, newLocation.coordinate.longitude, newLocation.timestamp];    
char *error;   
if ( sqlite3_exec(databasehandle, [insertStatement UTF8String], NULL, NULL, &error) == SQLITE_OK)
{
    NSLog(@"Location inserted. %@", newLocation.timestamp);
}    

else NSLog(@"Error: %s", error);

And here is the code that I'm working on right now. I'm not sure where to go from here:

 NSString *queryStatement = [NSString stringWithFormat:@"SELECT ID, latitude, longitude, timeStamp FROM LOCATION"];

// Prepare the query for execution
sqlite3_stmt *statement;


if (sqlite3_prepare_v2(databasehandle, [queryStatement UTF8String], -1, &statement, NULL) == SQLITE_OK)
{
    // Iterate over all returned rows
    while (sqlite3_step(statement) == SQLITE_ROW) {

Here is my JSON/HTTP code that I want to use to send the data

responseData = [NSMutableData data];

//whatever your server address is
NSURL *url = [NSURL URLWithString:@"http://www.resturl.com/whatever"];

NSError *jsonError;
//NSJSONSerialization is Apple's new json serialization class so we can use it to convert to and from json and foundation objects
NSData *requestdata = [NSJSONSerialization dataWithJSONObject:returnArray options:0 error:&jsonError];

NSMutableURLRequest *request;
 request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:@"POST"];
[request setValue:[NSString stringWithFormat:@"%d", [requestdata length]] forHTTPHeaderField:@"Content-Length"];
[request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:requestdata]; 

//this kicks off the request asynchronously
NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];

Any help would be appreciated!

回答1:

i am using same code but not post data in database using webservice.

NSURL *url = [NSURL URLWithString:@"someurl/try_ws_iphone/insertRecords.php"];
NSArray *res=[[NSArray alloc] initWithObjects:txtname.text, nil];
NSError *jsonError;
//NSJSONSerialization is Apple's new json serialization class so we can use it to convert to and from json and foundation objects
NSData *requestdata = [NSJSONSerialization dataWithJSONObject:res options:0 error:&jsonError];


NSMutableURLRequest *request;
request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:@"POST"];
[request setValue:[NSString stringWithFormat:@"%d", [requestdata length]] forHTTPHeaderField:@"Content-Length"];
[request setValue:@"application/json" forHTTPHeaderField:@"Accept"];
[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:requestdata];

//this kicks off the request asynchronously
NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];

来源：https://stackoverflow.com/questions/10288489/how-do-i-send-the-data-i-have-in-my-sqlite-database-to-the-server-with-http-and

标签

iphone

objective-c

cocoa-touch

sqlite

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