Download file from URL and place it in Resource folder in iPhone - iphone

I am new to iPhone developer,
How can i download the epub file from url and store it in Resource folder ?
Here is my code snippet,
- (void)viewDidLoad
{
[super viewDidLoad];
fileData = [NSMutableData data];
NSString *file = [NSString stringWithFormat:#"http://www.google.co.in/url?sa=t&rct=j&q=sample%20epub%20filetype%3Aepub&source=web&cd=2&ved=0CFMQFjAB&url=http%3A%2F%2Fdl.dropbox.com%2Fu%2F1177388%2Fflagship_july_4_2010_flying_island_press.epub&ei=i5gHUIOWJI3RrQeGro3YAg&usg=AFQjCNFPKsV-tieF4vKv7BXYmS-QEvd7Uw"];
NSURL *fileURL = [NSURL URLWithString:file];
NSURLRequest *req = [NSURLRequest requestWithURL:fileURL];
NSURLConnection *conn = [NSURLConnection connectionWithRequest:req delegate:self];
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
[self.fileData setLength:0];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[self.fileData appendData:data];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSArray *dirArray = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSLog(#"%#", [dirArray objectAtIndex:0]);
NSString *path = [NSString stringWithFormat:#"%#", [dirArray objectAtIndex:0]];
if ([self.fileData writeToFile:path options:NSAtomicWrite error:nil] == NO) {
NSLog(#"writeToFile error");
}
else {
NSLog(#"Written!");
}
}
I am not able to see anything in my NSLog.

There is a problem in creation of file path also while writing. you have not specified any filename in the path. In the below line, I have used file name as "filename.txt". Give some proper name and it will write.
NSString *path = [NSString stringWithFormat:#"%#/filename.txt", [dirArray objectAtIndex:0]];
There is a problem in creating URL also. Do it like this,
NSString *file = [NSString stringWithString:#"http://www.google.co.in/url?sa=t&rct=j&q=sample%20epub%20filetype%3Aepub&source=web&cd=2&ved=0CFMQFjAB&url=http%3A%2F%2Fdl.dropbox.com%2Fu%2F1177388%2Fflagship_july_4_2010_flying_island_press.epub&ei=i5gHUIOWJI3RrQeGro3YAg&usg=AFQjCNFPKsV-tieF4vKv7BXYmS-QEvd7Uw"];
NSURL *fileURL = [NSURL URLWithString:file];
You have created your file data with below line.
fileData = [NSMutableData data];
Make it like below,
fileData = [[NSMutableData alloc]init];
OR
self.fileData = [NSMutableData data];
Here iOS releases filedata before your connection delegate get called.

Related

iOS reading txt from web

I am trying to read a file from a web, but it is not working! So please need some help!!
NSArray *paths = NSSearchPathForDirectoriesInDomains(
NSDocumentDirectory,
NSUserDomainMask, YES);
NSString *docDirPath = [paths objectAtIndex:0];
NSString *filePath = [docDirPath
stringByAppendingPathComponent:#"filess.txt"];
NSURL* url;
NSString* content;
NSFileManager* fileManager = [NSFileManager defaultManager];
if ([fileManager fileExistsAtPath:filePath])
{
content = [[NSString alloc]
initWithContentsOfFile:filePath
encoding:NSUTF8StringEncoding error:nil];
}
else
{
url = [[NSURL alloc]
initWithString:#"http://sdsd/about/readme.txt"];
content = [[NSString alloc]
initWithContentsOfURL:url
encoding:NSUTF8StringEncoding error:nil];
[url release];
[content writeToFile:filePath atomically:YES
encoding:NSUTF8StringEncoding error:nil];
}
Thanks
use this code to download text file
NSURLRequest *theRequest=[NSURLRequest requestWithURL:theURL
cachePolicy:NSURLRequestUseProtocolCachePolicy
timeoutInterval:10.0];
NSData *returnData = [NSURLConnection sendSynchronousRequest:theRequest returningResponse:nil error:&urlerror];
NSString *file = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
///do request like this
NSString *strUrl=[NSString stringWithFormat:#"your url"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:strUrl]];
downloadConn = [NSURLConnection connectionWithRequest:request
delegate:self];
[downloadConn start];
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse * )response
{
responseData=[[NSMutableData alloc]init];
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[responseData appendData:data];
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
NSLog(#"%#",[error description]);
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
Get your response in NSdata and write it as follows
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *dataPath = [path stringByAppendingPathComponent:#"yourfile.txt"];
dataPath = [dataPath stringByStandardizingPath];
[responseData writeToFile:dataPath atomically:YES];
}

Write file to NSDocument directory show UIProgressView in iPhone?

I have a pdf file from server.
Then I need to load the file to NSDocument directory path and its working fine, but i want to show UIProgressView for store each bytes. How to do this , please help me
Thanks in Advance
I tried to store like this:
NSError *error;
NSArray *ipaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *idocumentsDir = [ipaths objectAtIndex:0];
NSString *idataPath = [idocumentsDir stringByAppendingPathComponent:#"File"];
NSLog(#"idataPath:%#",idataPath);
//Create folder here
if (![[NSFileManager defaultManager] fileExistsAtPath:idataPath])
{
[[NSFileManager defaultManager] createDirectoryAtPath:idataPath withIntermediateDirectories:NO attributes:nil error:&error];
}
// Image Download here
NSString *fileName = [idataPath stringByAppendingFormat:#"/image.jpg"];
NSLog(#"imagePathDOWNLOAD:%#",fileName);
NSData *pdfData1 = [[NSData alloc] initWithContentsOfURL:[NSURL URLWithString:[URLArray objectAtIndex:a]]];
[pdfData1 writeToFile:fileName atomically:YES];
You can use NSURLConnection class to implement progress bar:
.h:
NSMutableData *responseData;
NSString *originalFileSize;
NSString *downloadedFileSize;
.m:
- (void)load {
NSURL *myURL = [NSURL URLWithString:#""];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:myURL
cachePolicy:NSURLRequestReloadIgnoringLocalCacheData
timeoutInterval:60];
[[NSURLConnection alloc] initWithRequest:request delegate:self];
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response {
responseData = [[NSMutableData alloc] init];
originalFileSize = [response expectedContentLength];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data {
[responseData appendData:data];
downloadedFileSize = [responseData length];
progressBar.progress = ([originalFileSize floatValue] / [downloadedFileSize floatValue]);
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
[responseData release];
[connection release];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSLog(#"Succeeded! Received %d bytes of data",[responseData lengtn]);
}
Let me know for any queries.

downloading using NSURLConnection not downloading anything?

i am using NSURLConnection to download mp3 data from the server , my code is here
- (IBAction)downloadData:(id)sender
{
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
NSURL *url = [[NSURL alloc] initWithString:#"http://viadj.viastreaming.net/start/psalmsmedia/ondemand/Nin%20snehamethrayo.mp3"];
[request setURL:url];
[url release];
url = nil;
NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:request delegate:self];
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
responseData = [[NSMutableData alloc] init];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[responseData appendData:data];
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
[responseData release];
[connection release];
}
- (void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSLog(#"Succeeded! Received %d bytes of data",[responseData
length]);
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *fileName = [[paths objectAtIndex:0] stringByAppendingPathComponent:#"myFile"];
[responseData writeToFile:fileName atomically:YES];
responseData = nil;
self->imageConnection = nil;
}
am little bit confused about the path given to download. when i click download button i shows "Succeeded! Received 1329 bytes of data" but nothing is downloading. need some help. how will we specify the local path of iPhone to store downloaded data?
- (IBAction)downloadData:(id)sender
{
NSURL *url = [[NSURL alloc] initWithString:#"http://viadj.viastreaming.net/start/psalmsmedia/ondemand/Nin%20snehamethrayo.mp3"];
NSMutableURLRequest *theRequest_to = [NSMutableURLRequest requestWithURL:url];
[url release];
NSURLConnection *conn = [[NSURLConnection alloc] initWithRequest:theRequest_to delegate:self];
}
- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse*)response
{
NSString *filepath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0] stringByAppendingPathComponent:#"snehamethrayo.mp3"]; // here you can set your filename which you can get from url
[[NSFileManager defaultManager] createFileAtPath:filepath contents:nil attributes:nil];
file = [[NSFileHandle fileHandleForUpdatingAtPath:filepath] retain];// Here file is object of NSFileHandle and its declare in .h File
[file seekToEndOfFile];
}
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[file seekToEndOfFile];
[file writeData:data];
}
- (void)connectionDidFinishLoading:(NSURLConnection*)connection
{
[file closeFile];
}
No need for any code change I think.Just put an nslog and see...
NSString *fileName = [[paths objectAtIndex:0] stringByAppendingPathComponent:#"myFile"];
NSLog(#"%#",fileName);
That will list the file location like this
/Users/me/Library/Application Support/iPhone Simulator/5.0/Applications/(your app)/Documents/myFile. ie the downloaded file is in your document folder.
note: don't forget to put the file format ie
NSString *fileName = [[paths objectAtIndex:0] stringByAppendingPathComponent:#"myFile.mp3"];

How to download CSV file from server in Objective-C

I'm developing a new iPhone application, Here i have parsed a 'csv' file from local, and its working with me. When i try to download the 'csv' file from the server programmatically, it didn't workout for me. Could you please help me?
Loading data from local file (Working fine)
- (void)viewDidLoad
{
[super viewDidLoad];
NSString * file = [[NSBundle bundleForClass:[self class]] pathForResource:#"sample" ofType:#"csv"];
NSStringEncoding encoding = 0;
NSString * csv = [NSString stringWithContentsOfFile:file usedEncoding:&encoding error:nil];
NSArray *fields = [csv CSVComponents];
NSLog(#"fields: %#", fields); //getting the result content
}
Download the file from Server (failed)
-(void) connectionDidFinishLoading:(NSURLConnection *)connection
{
NSLog(#"connectionDidFinishLoading"); //nothing showing here
NSString *docDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *fullName = [NSString stringWithFormat:#"quotes.csv"];
NSString *fullFilePath = [NSString stringWithFormat:#"%#/%#",docDir,fullName];
[receivedData writeToFile:fullFilePath atomically:YES];
}
-(void) connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
NSLog(#"data: %#", data); //nothing showing here
if (receivedData)
[receivedData appendData:data];
else
receivedData = [[NSMutableData alloc] initWithData:data];
}
- (void)loadDatafromURL
{
NSURL *url = [NSURL URLWithString:#"http://download.finance.yahoo.com/d/quotes.csv?s=^GSPC,^IXIC,^dji,^GSPC,^BVSP,^GSPTSE,^FTSE,^GDAXI,^FCHI,^STOXX50E,^AEX,^IBEX,^SSMI,^N225,^AXJO,^HSI,^NSEI&f=sl1d1t1c1ohgv&e=.csv"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[NSURLConnection connectionWithRequest:request delegate:self];
}
Implement this method:
-(void)connection:(NSURLConnection *)conn didFailWithError:(NSError *)error
You'll find that you're getting an error of
Error Domain=NSURLErrorDomain Code=-1000 "bad URL" UserInfo=0xf663f40 {NSUnderlyingError=0xf663de0 "bad URL", NSLocalizedDescription=bad URL}
I've looked into downloading information this way before, and I think one problem you're having is that separate symbols have to be separated with a "+". Also, when pulling an index, you can't pass the "^" symbol as part of the URL. You have to replace it with "%5E".
So, add this:
- (void) connection:(NSURLConnection *)connection didFailWithError:(NSError *)error {
NSLog(#"%#", [error description]);
}
And change your URL to this:
NSString *urlString = #"http://download.finance.yahoo.com/d/quotes.csv?s=^GSPC+^IXIC+^dji+^GSPC+^BVSP+^GSPTSE+^FTSE+^GDAXI+^FCHI+^STOXX50E+^AEX+^IBEX+^SSMI+^N225+^AXJO+^HSI+^NSEI&f=sl1d1t1c1ohgv&e=.csv";
NSURL *url = [NSURL URLWithString:[urlString stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding]];
Now it works for me! I even checked the output .csv file, and it looks good to go! One full quote per line.
If you plan on fetching more data over the network than this single csv, you could have a look at AFNetworking, it's a great library for doing network operations.
A working solution would then look a bit like this:
- (void)getCSVAsynch {
NSString *unescaped = #"http://download.finance.yahoo.com/d/quotes.csv?s=^GSPC,^IXIC,^dji,^GSPC,^BVSP,^GSPTSE,^FTSE,^GDAXI,^FCHI,^STOXX50E,^AEX,^IBEX,^SSMI,^N225,^AXJO,^HSI,^NSEI&f=sl1d1t1c1ohgv&e=.csv";
NSURL *url = [NSURL URLWithString:[unescaped stringByAddingPercentEscapesUsingEncoding:NSASCIIStringEncoding]];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
[operation setCompletionBlockWithSuccess:^(AFHTTPRequestOperation *operation, id responseObject) {
NSLog(#"CSV: %#", [[NSString alloc] initWithBytes:[responseObject bytes] length:[responseObject length] encoding:NSUTF8StringEncoding]);
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
NSLog(#"Things go boom. %#", [error localizedDescription]);
}];
[operation start];
}

Copy XML file from Server to iphone?

I want to copy the xml file from server to save it to locally, because if I will send request to server again and again, it will take time, so I want to copy the xml to local resources whenever app starts, then parse the local xml,
how can I do it?
First of all you need to download the file:
NSURL *url = [NSURL URLWithString:FILEURL];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[NSURLConnection connectionWithRequest:request delegate:self];
then add in the h file:
NSMutableData *receivedData;
and in the m file:
-(void) connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
if (receivedData)
{
[receivedData appendData:data];
}
else
{
receivedData = [[NSMutableData alloc] initWithData:data];
}
}
-(void) connectionDidFinishLoading:(NSURLConnection *)connection
{
//saving your data in the local
NSString *docDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *fullName = [NSString stringWithFormat:#"xmlfile.xml"];
NSString *fullFilePath = [NSString stringWithFormat:#"%#/%#",docDir,fullName];
[receivedData writeToFile:fullFilePath atomically:YES];
}
edit:
get the file from local-
NSString *docDir = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSString *fullName = [NSString stringWithFormat:#"xmlfile.xml"];
NSString *fullFilePath = [NSString stringWithFormat:#"%#/%#",docDir,fullName];
NSData *myData = [NSData dataWithContentsOfFile:filePath];
now you can take the NSData when parse it,there are a lot of examples in the site.