早上好, 我開發上傳一些文件的應用程序;沒有真正的問題,但只有一個大問題:如果我嘗試上傳1GB的文件,它會分配1GB的內存,並且您可以理解這不是一件好事。NSMutableURLRequest和內存問題
這裏是我的代碼:我分配數據的NSData,然後我用NSMutableURLRequest + NSURLConnection的上傳他們。我的問題是:有沒有辦法做到這一點,而不需要分配整個內存?我搜索了,但我沒有發現任何...
_uploadDataFile是之前分配的NSData子類的實例。
NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:@"http://my.server/page"]
cachePolicy:NSURLRequestReloadIgnoringCacheData
timeoutInterval:60.0] autorelease];
NSData *dataFile;
if (_uploadDataFile == nil) {
NSError *error = nil;
dataFile = [[[NSData alloc] initWithContentsOfFile:@"pathToFile" options:NSDataReadingUncached error:&error] autorelease];
if (error) {
NSLog(@"Error %i: %@", [error code], [error localizedDescription]);
[self fermaUpload]; //Stop Upload
return;
}
}
else
dataFile = [_uploadDataFile file];
NSMutableDictionary *dictPost = [[[NSMutableDictionary alloc] init] autorelease];
[dictPost setValue:dataFile forKey:@"uploads[]"];
NSData *mutData = [self dataForPOSTWithDictionary:dictPost boundary:@"0194784892923" nomeFile:[@"pathToFile" lastPathComponent]];
NSString *postLength = [NSString stringWithFormat:@"%d", [mutData length]];
[request setHTTPMethod:@"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setValue:@"multipart/form-data; boundary=0194784892923" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody:mutData];
[request setHTTPShouldHandleCookies:YES];
theConnection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
,這裏是如何 - (NSData的*)dataForPOSTWithDictionary:邊界:nomeFile:方法是這樣的:
- (NSData *)dataForPOSTWithDictionary:(NSDictionary *)aDictionary boundary:(NSString *)aBoundary nomeFile:(NSString *)nomeFile {
NSArray *myDictKeys = [aDictionary allKeys];
NSMutableData *myData = [NSMutableData dataWithCapacity:1];
NSString *myBoundary = [NSString stringWithFormat:@"--%@\r\n", aBoundary];
for(int i = 0;i < [myDictKeys count];i++) {
id myValue = [aDictionary valueForKey:[myDictKeys objectAtIndex:i]];
[myData appendData:[myBoundary dataUsingEncoding:NSUTF8StringEncoding]];
//if ([myValue class] == [NSString class]) {
if ([myValue isKindOfClass:[NSString class]]) {
[myData appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"\r\n\r\n", [myDictKeys objectAtIndex:i]] dataUsingEncoding:NSUTF8StringEncoding]];
[myData appendData:[[NSString stringWithFormat:@"%@", myValue] dataUsingEncoding:NSUTF8StringEncoding]];
} else if(([myValue isKindOfClass:[NSURL class]]) && ([myValue isFileURL])) {
[myData appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"%@\"\r\n", [myDictKeys objectAtIndex:i], [[myValue path] lastPathComponent]] dataUsingEncoding:NSUTF8StringEncoding]];
[myData appendData:[[NSString stringWithFormat:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[myData appendData:[NSData dataWithContentsOfFile:[myValue path]]];
} else if(([myValue isKindOfClass:[NSData class]])) {
[myData appendData:[[NSString stringWithFormat:@"Content-Disposition: form-data; name=\"%@\"; filename=\"%@\"\r\n", [myDictKeys objectAtIndex:i], nomeFile] dataUsingEncoding:NSUTF8StringEncoding]];
[myData appendData:[[NSString stringWithFormat:@"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[myData appendData:myValue];
} // eof if()
[myData appendData:[[NSString stringWithString:@"\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
} // eof for()
[myData appendData:[[NSString stringWithFormat:@"--%@--\r\n", aBoundary] dataUsingEncoding:NSUTF8StringEncoding]];
return myData; } // eof dataForPOSTWithDictionary:boundary:
謝謝你,對不起我的英語。
謝謝!你給了我一個提振,所以我再次開始查找,經過一個小時的搜索,我發現ASIHTTPRequest具有我想要的:具有問題的每個人都應該使用ASIFormDataRequests,如下所示:http:// allseeing-i.com/ASIHTTPRequest/How-to-use#streaming它們使用CFReadStreamCreateForStreamedHTTPRequest創建請求,基本上就是你所說的。 – Sylter