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연결 대상 URL은 매우 많은 양의 데이터를 CSV 출력 형식으로 출력하는 PHP 파일입니다.NSURLConnection을 사용하여 매우 큰 문자열을 반환하는 올바른 방법은 무엇입니까?
지금 모든 것이 올바르게 작동하며 NSURLConnection을 사용하여 오류가 발생하지 않습니다. 그러나 connectionDidFinishLoading을 사용할 때 모든 데이터가 수신되지 않습니다. didReceiveData에 데이터를 추가하려고합니다. 때로는 다른 사람들보다 더 많은 데이터를 얻습니다. 따라서 연결이 데이터를 가져올만큼 길게 열려 있지 않은 것 같습니다.
NSURLConnection을 사용하여 매우 큰 문자열을 얻는 올바른 방법은 무엇입니까?
- (void)checkDatabaseUpdate_Places
{
NSString *post =
[[NSString alloc] initWithFormat:@"some_parameters_here"];
NSData *postData = [post dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]];
NSURL *url = [NSURL URLWithString:@"site_url_here"];
NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url];
[theRequest setHTTPMethod:@"POST"];
[theRequest setValue:postLength forHTTPHeaderField:@"Content-Length"];
[theRequest setHTTPBody:postData];
[theRequest setTimeoutInterval:30];
[theRequest setHTTPShouldHandleCookies:NO];
NSURLConnection *theConnection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
if(theConnection)
{
placesTableData = [[NSMutableData alloc] init];
placesTableVerification = @"getting data";
}
else
{
NSLog(@"Bad Connection for Places");
}
}
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
long long dataSize = [response expectedContentLength];
NSLog(@"expected data size: %lld", dataSize);
if ([placesTableVerification isEqualToString:@"getting data"]) {
[placesTableData setLength: 0];
}
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
if ([placesTableVerification isEqualToString:@"getting data"]) {
[placesTableData appendData:data];
placesTableVerification = @"got data";
}
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
NSLog(@"connectionDidFailWithError %@",error.description);
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Defaults Could Not Load" message:@"There was an error loading your defaults. Make sure your device has an active internet connection." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alert show];
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
//Database Setup
NSString *docsDir;
NSArray *dirPaths;
// Get the documents directory
dirPaths = NSSearchPathForDirectoriesInDomains(
NSDocumentDirectory, NSUserDomainMask, YES);
docsDir = dirPaths[0];
// Build the path to the database file
_databasePath = [[NSString alloc]
initWithString: [docsDir stringByAppendingPathComponent:
@"database_name.db"]];
NSLog(@"%@",_databasePath);
NSFileManager *filemgr = [NSFileManager defaultManager];
if ([filemgr fileExistsAtPath: _databasePath ] == NO)
{
const char *dbpath = [_databasePath UTF8String];
if (sqlite3_open(dbpath, &_database) == SQLITE_OK)
{
//do nothing
} else {
NSLog(@"Failed to open database");
}
}
const char *dbpath = [_databasePath UTF8String];
sqlite3_stmt *statement;
//start Places Table Update
if ([placesTableVerification isEqualToString:@"got data"]) {
NSString *returnedData = [[NSString alloc] initWithBytes: [placesTableData mutableBytes] length:[placesTableData length] encoding:NSUTF8StringEncoding];
NSLog(@"%lu -- %@",(unsigned long)[placesTableData length],returnedData);
if (sqlite3_open(dbpath, &_database) == SQLITE_OK)
{
NSArray *tempArray = [[NSArray alloc] initWithArray:[returnedData componentsSeparatedByString:@"~~"]];
NSString *tempItems = [[NSString alloc] init];
for (tempItems in tempArray) {
NSArray *itemArray = [[NSArray alloc] init];
itemArray = [tempItems componentsSeparatedByCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"|"]];
NSMutableString *loadDB = [[NSMutableString alloc] initWithFormat:@"INSERT OR REPLACE INTO PLACES (ID,NAME,TYPE,CATEGORY,LATITUDE,LONGITUDE,CHAMBER_PRIMARY_CATEGORY,CHAMBER_SECONDARY_CATEGORY,INFORMATION,PHONE,FAX,EMAIL,WEBSITE,PHYSICAL_ADDRESS,MAILING_ADDRESS,START_DATE,STOP_DATE,HOTSPOT_FACTOR,MODIFIED) VALUES ("];
int lastIndex = [itemArray count];
int count = 0;
NSString *tempItem = [[NSString alloc] init];
for (tempItem in itemArray) {
count++;
NSString* string = [NSString stringWithFormat:@"%@" , tempItem];
if (count != lastIndex && string.length != 0) {
[loadDB appendString:@"\""];
[loadDB appendString:tempItem];
[loadDB appendString:@"\""];
[loadDB appendString:@","];
}
else if (count == lastIndex && string.length != 0){
[loadDB appendString:@"\""];
[loadDB appendString:tempItem];
[loadDB appendString:@"\""];
}
else {
[loadDB appendString:@"\"\","];
}
}
//end for
loadDB = [[loadDB substringWithRange:NSMakeRange(0, loadDB.length)] mutableCopy];
[loadDB appendString:@")"];
//NSLog(loadDB);
const char *errMsg;
const char *insert_stmt = [loadDB UTF8String];
sqlite3_prepare_v2(_database, insert_stmt,
-1, &statement, &errMsg);
NSLog(@"%s",insert_stmt);
NSLog(@"%d",sqlite3_prepare_v2(_database, insert_stmt,
-1, &statement, &errMsg));
NSLog(@"%s",sqlite3_errmsg(_database));
if (sqlite3_step(statement) == SQLITE_DONE)
{
NSLog(@"Places Table Updated");
}
//end if
else {
NSLog(@"Places Table Failed To Update");
//NSLog(@"%d",sqlite3_step(statement));
}
//end else
sqlite3_finalize(statement);
NSLog(@"%s",sqlite3_errmsg(_database));
}
//end for
}
//end if
sqlite3_close(_the_kearney_app_database);
[startupProgress setProgress:0.3 animated:YES];
}
//end Places Table Update
}
어떤 도움 당신은 내가 감사 서버에서 최대 출력을 얻기되지 않을 수 있습니다 이유에 저를 줄 수 있습니다 : 여기
내가 사용하고있는 코드입니다.긴 데이터 솔루션
- (void)checkDatabaseUpdate_Places
{
NSString *post =
[[NSString alloc] initWithFormat:@"some_parameters_here"];
NSData *postData = [post dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
NSString *postLength = [NSString stringWithFormat:@"%d", [postData length]];
NSURL *url = [NSURL URLWithString:@"site_url_here"];
NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:url];
[theRequest setHTTPMethod:@"POST"];
[theRequest setValue:postLength forHTTPHeaderField:@"Content-Length"];
[theRequest setHTTPBody:postData];
[theRequest setTimeoutInterval:30];
[theRequest setHTTPShouldHandleCookies:NO];
NSURLConnection *theConnection = [[NSURLConnection alloc] initWithRequest:theRequest delegate:self];
if(theConnection)
{
placesTableData = [[NSMutableData alloc] init];
placesTableVerification = @"getting data";
}
else
{
NSLog(@"Bad Connection for Places");
}
}
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
long long dataSize = [response expectedContentLength];
NSLog(@"expected data size: %lld", dataSize);
if ([placesTableVerification isEqualToString:@"getting data"]) {
[placesTableData setLength: 0];
}
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
if ([placesTableVerification isEqualToString:@"getting data"]) {
[placesTableData appendData:data];
}
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
NSLog(@"connectionDidFailWithError %@",error.description);
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Defaults Could Not Load" message:@"There was an error loading your defaults. Make sure your device has an active internet connection." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alert show];
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
//Database Setup
NSString *docsDir;
NSArray *dirPaths;
// Get the documents directory
dirPaths = NSSearchPathForDirectoriesInDomains(
NSDocumentDirectory, NSUserDomainMask, YES);
docsDir = dirPaths[0];
// Build the path to the database file
_databasePath = [[NSString alloc]
initWithString: [docsDir stringByAppendingPathComponent:
@"database_name.db"]];
NSLog(@"%@",_databasePath);
NSFileManager *filemgr = [NSFileManager defaultManager];
if ([filemgr fileExistsAtPath: _databasePath ] == NO)
{
const char *dbpath = [_databasePath UTF8String];
if (sqlite3_open(dbpath, &_database) == SQLITE_OK)
{
//do nothing
} else {
NSLog(@"Failed to open database");
}
}
const char *dbpath = [_databasePath UTF8String];
sqlite3_stmt *statement;
//start Places Table Update
if ([placesTableVerification isEqualToString:@"getting data"]) {
NSString *returnedData = [[NSString alloc] initWithBytes: [placesTableData mutableBytes] length:[placesTableData length] encoding:NSUTF8StringEncoding];
NSLog(@"%lu -- %@",(unsigned long)[placesTableData length],returnedData);
if (sqlite3_open(dbpath, &_database) == SQLITE_OK)
{
NSArray *tempArray = [[NSArray alloc] initWithArray:[returnedData componentsSeparatedByString:@"~~"]];
NSString *tempItems = [[NSString alloc] init];
for (tempItems in tempArray) {
NSArray *itemArray = [[NSArray alloc] init];
itemArray = [tempItems componentsSeparatedByCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"|"]];
NSMutableString *loadDB = [[NSMutableString alloc] initWithFormat:@"INSERT OR REPLACE INTO PLACES (ID,NAME,TYPE,CATEGORY,LATITUDE,LONGITUDE,CHAMBER_PRIMARY_CATEGORY,CHAMBER_SECONDARY_CATEGORY,INFORMATION,PHONE,FAX,EMAIL,WEBSITE,PHYSICAL_ADDRESS,MAILING_ADDRESS,START_DATE,STOP_DATE,HOTSPOT_FACTOR,MODIFIED) VALUES ("];
int lastIndex = [itemArray count];
int count = 0;
NSString *tempItem = [[NSString alloc] init];
for (tempItem in itemArray) {
count++;
NSString* string = [NSString stringWithFormat:@"%@" , tempItem];
if (count != lastIndex && string.length != 0) {
[loadDB appendString:@"\""];
[loadDB appendString:tempItem];
[loadDB appendString:@"\""];
[loadDB appendString:@","];
}
else if (count == lastIndex && string.length != 0){
[loadDB appendString:@"\""];
[loadDB appendString:tempItem];
[loadDB appendString:@"\""];
}
else {
[loadDB appendString:@"\"\","];
}
}
//end for
loadDB = [[loadDB substringWithRange:NSMakeRange(0, loadDB.length)] mutableCopy];
[loadDB appendString:@")"];
//NSLog(loadDB);
const char *errMsg;
const char *insert_stmt = [loadDB UTF8String];
sqlite3_prepare_v2(_database, insert_stmt,
-1, &statement, &errMsg);
NSLog(@"%s",insert_stmt);
NSLog(@"%d",sqlite3_prepare_v2(_database, insert_stmt,
-1, &statement, &errMsg));
NSLog(@"%s",sqlite3_errmsg(_database));
if (sqlite3_step(statement) == SQLITE_DONE)
{
NSLog(@"Places Table Updated");
}
//end if
else {
NSLog(@"Places Table Failed To Update");
//NSLog(@"%d",sqlite3_step(statement));
}
//end else
sqlite3_finalize(statement);
NSLog(@"%s",sqlite3_errmsg(_database));
}
//end for
}
//end if
sqlite3_close(_the_kearney_app_database);
[startupProgress setProgress:0.3 animated:YES];
}
//end Places Table Update
}
'NSURLConnection'에 사용하는 init 메소드는 즉시 로딩을 시작하지만'placesTableData'는 아직 초기화되지 않았습니다. 'theConnection' 전에'placesTableData'를 초기화하면 어떻게 될까요? https://developer.apple.com/library/ios/documentation/cocoa/reference/foundation/Classes/NSURLConnection_Class/Reference/Reference.html#//apple_ref/doc/uid/20001697-BAJDDIDG –
좋은 질문입니다. 나는 그것을 지금 시도 할 것이다. – mcphersonjr
@MikeD 같은 결과가 있습니다. 그것은 모든 데이터를로드하기 전에 연결이 닫히고 데이터가 충분히 빨리 캡처되지 않는 것이 아닙니다. 그러나 나는 그것에 대해 완전히 틀릴 수 있습니다. – mcphersonjr