I'm new to objective-c and am wondering if there is a better way that the following to create the HTTP POST body that the method I have below.
- (NSData*) generateBody: (NSDictionary*) requestParams {
NSMutableData *body = [[[NSMutableData alloc] initWithCapacity:1024] autorelease];
BOOL firstParam = YES;
for (NSString* key in requestParams) {
NSString *value = [requestParams valueForKey:key];
if ( firstParam ) {
firstParam = NO;
} else {
[body appendData:[#"&" dataUsingEncoding:NSUTF8StringEncoding]];
}
[body appendData:[key dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[#"=" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[value dataUsingEncoding:NSUTF8StringEncoding]];
}
return body;
}
Yes.
Have a look at ASIHTTPRequest , specifically, the ASIFormDataRequest class (just search for it in that link)
It's like a better version of NSURLConnection :) It also seems to be becoming the industry standard way to do web requests and an essential part of every iOS developers library of tools :)
If it accepts JSON formatted data try looking at NSJSONSerialization in the Apple docs. Works great.
Related
This has had me scratching for quite some time.
I am preparing a UIImage to post as part of a HTTP request. I am doing this with the following code:
[postData appendData:[[NSString stringWithFormat:#"--%#\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postData appendData:[[NSString stringWithFormat:#"Content-Disposition: attachment; name=\"q%#\"; filename=\".jpg\"\r\n" , key] dataUsingEncoding:NSUTF8StringEncoding]];
[postData appendData:[#"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[postData appendData:[NSData dataWithData:UIImageJPEGRepresentation(image, 1.0)]];
[postData appendData:[#"\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
The problem I am having is that postData is null after running these lines.
Using NSLog I found out that [postData appendData:[NSData dataWithData:UIImageJPEGRepresentation(image, 1.0)]]; is the line which is causing this to happen. I then went on to see if the image was a the problem. UIImageJPEGRepresentation(image, 1.0) outputs a mass of data to the console and adding image to a UIImageView shows the .jpg I was expecting.
I am absolutely bamboozled. Please help >.<
S
EDIT
After a bit of a debacle below I have realised that it is definitely posting the image
.
NSLog(#"postData = %#",[postData length]);
shows 280861 (bytes?) but a PHP file with <?php print_r($_FILES); ?> returns Array {}.
UIImageJPEGRepresentation(image, 1.0) returns a NSData object that can't be turned into a NSString. A jpeg does not consist of valid characters. And arbitrary data can't be converted to a valid string.
Even if UIImageJPEGRepresentation(image, 1.0) returns nil, the [NSData dataWithData:] call makes sure that the data you append to postData is not nil. [NSData dataWithData:nil]; returns an empty NSData instance, not nil.
Regarding your answer. nil is not a valid string encoding. The compiler should show a warning and you should see a warning in the console "Incorrect NSStringEncoding value 0x0000 detected. Assuming NSASCIIStringEncoding. Will stop this compatiblity mapping behavior in the near future.".
You can't convert postData back into a NSString. If you want to check that the image is part of the NSData object you could look at the length of postData.
Resolved with:
[postData appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postData appendData:[[NSString stringWithFormat:#"Content-Disposition: form-data; name=\"%#\";\r\nfilename=\"%#.jpeg\"\r\nContent-Type: image/jpeg\r\n\r\n", key,key] dataUsingEncoding:NSUTF8StringEncoding]];
[postData appendData:[NSData dataWithData:imageData]];
[postData appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
The first newline after my already included data seems to have resolved this
How did you tell postData was null? Please note that you can't convert it to UTF8 string using some category/extension as below.
extension NSData {
func to_string(encoding:UInt = NSUTF8StringEncoding) -> String? {
return NSString(data:self, encoding:encoding) as? String
}
}
I am looking for the best way to display a MIME message to the user. In fact, it is not an email message, it is a newsgroup (NNTP) message that is encapsulated in a MIME body. Currently I am displaying it in an UILabel but there are several problems, such as the quotation on replies and internal links. It would be great to display it similar to the built-in email app from Apple.
Does anyone have some suggestions on this?
Okay, I have erased the MIME header from the message and set up a basic HTML structure using the following code in the ViewDidLoad...
//setting up html body
NSMutableString *body = [[NSMutableString alloc] init];
NSString *head = #"<HTML><HEAD></HEAD><body>";
NSString *footer = #"</body></HTML>";
//css settings
NSMutableString *css = [[NSMutableString alloc] init];
[css appendString:#"word-wrap: break-word;"];
[css appendString:#"font-family: 'Helvetica', Verdana, Arial, serif;"];
[css appendFormat:#"font-size: 11pt;"];
//building html string
[body appendString:head];
[body appendFormat:#"<div style=\"%#\">", css];
NSString *HTMLbody = [MYPLAINTEXTBODYSTRING stringByReplacingOccurrencesOfString:#"\n" withString:#"<br/>"];
[body appendString:HTMLbody];
[body appendString:#"</div>"];
[body appendString:footer];
self.MYSTRINGBODYPROPERTY = body;
... and load the before created body in the UIWebView.
[[[bodyWebView subviews] lastObject] setScrollEnabled:NO];
[bodyWebView loadHTMLString:self.body baseURL:nil];
[bodyWebView sizeToFit];
Now everything looks similar to Apples Mail App. Thanks.
Though I haven't tried it, I would guess a WebView could be best to handle this.
I am using http post method and passing base64econded string into xml. But it gives me 400 in response. XMl tag structure is valid. When I removed this base64encoded string from xml it works perfectly. But including it gives error(400). Would base64encoded string may contains any character that make my request invalid ? Any help is welcome.
This may be caused by your boundary definitions not being 100% correct, eg. using wrong
Content-type: multipart/form-data, boundary=XXboundaryXX
instead of the correct
Content-type: multipart/form-data; boundary=XXboundaryXX
It may also be your boundary delimiters in the body that are not using correct syntax, eg. using wrong
--XXboundaryXX\r\n
instead of the correct
\r\n--XXboundaryXX\r\n
The following snippet should be correct for posting xml data, even for som nitty gritty older apache servers:
[request setValue:USER_AGENT forHTTPHeaderField:#"User-Agent"];
[request setTimeoutInterval: 15];
[request setHTTPMethod:#"POST"];
NSString *contentType = [NSString stringWithFormat:#"multipart/form-data; boundary=%#", boundary];
[request setValue:contentType forHTTPHeaderField:#"Content-type"];
NSMutableData *postBody = [NSMutableData data];
[postBody appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[#"Content-Disposition: form-data; name=\"xmlstring\"\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[xml dataUsingEncoding:NSUTF8StringEncoding]];
[postBody appendData:[[NSString stringWithFormat:#"\r\n--%#--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[request setHTTPBody:postBody];
I have previously discovered error 400 if these delimiters were not 100% correct.
Check your base64encoder. You can do it here
I'm using solution from this discussion.
If it's all right with your encoder, I suppose you're incorrect paste it into your xml (maybe with slashes or other 'bad' symbols)
I do have some image files(.png files) in document directory(iPhone). I am viewing web forms(.aspx) on the UIWebView. when I click on the submit button of the form, i just want to attach the image file to the form and wants to send that file to the web server along with the web form.
The thing I m suffering from is, i am not getting how to attach an image file to the web form and how to submit those two.
Kindly help me out of this. I am not getting any of the hint how to do it.
Thanking you....
You will need to modify these examples to work for you, but they are working examples.
Objective-C
MyViewController.m:
- (void) upload
{
NSString *urlString = #"http://www.yourwebsite.com/uploads/upload.php";
NSData *data = /* turn your png into NSData */
// setting up the request object now
NSMutableURLRequest *request = [[[NSMutableURLRequest alloc] init] autorelease];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:#"POST"];
NSString *boundary = [NSString stringWithString:#"---------------------------14737809831466499882746641449"];
NSString *contentType = [NSString stringWithFormat:#"multipart/form-data; boundary=%#",boundary];
[request addValue:contentType forHTTPHeaderField: #"Content-Type"];
/* now lets create the body of the post */
NSString *content = [NSString stringWithFormat:#"Content-Disposition: form-data; name=\"userfile\"; filename=\"%#.png\"\r\n",#"yourPng"];
NSMutableData *body = [NSMutableData data];
[body appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:content] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:#"Content-Type: text/plain\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[NSData dataWithData:data]];
[body appendData:[[NSString stringWithFormat:#"\r\n--%#--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
// setting the body of the post to the reqeust
[request setHTTPBody:body];
// now lets make the connection to the web
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
}
PHP
upload.php:
<?php
//assuming upload.php and upload folder are in the same dir
$uploaddir = 'uploads/';
$file = basename($_FILES['userfile']['name']);
$uploadfile = $uploaddir . $file;
$product = $_GET[product];
if (is_uploaded_file($_FILES['userfile']['tmp_name']))
{
echo "PNG uploaded. \r\n";
} else {
echo "PNG not uploaded. \r\n";
}
if ($_FILES['userfile']['size']> 300000) //Limiting image at 300K
{
exit("Your file is too large.");
}
// Add support here for PNG files:
if ((!($_FILES['userfile']['type'] == "text/plain")) && //Also allowing
(!($_FILES['userfile']['type'] == "text/plist")) && //plist files
(!($_FILES['userfile']['type'] == "text/html"))) //HTML files
{
exit("Incorrect file type. " . $_FILES['userfile']['type'] . " is the file type you uploaded.");
}
if (move_uploaded_file($_FILES['userfile']['tmp_name'], $uploadfile)) {
$postsize = ini_get('post_max_size'); //Not necessary, I was using these
$canupload = ini_get('file_uploads'); //server variables to see what was
$tempdir = ini_get('upload_tmp_dir'); //going wrong.
$maxsize = ini_get('upload_max_filesize');
echo "http://www.yourwebsite.com/uploads/{$file}" . "\r\n" . $_FILES['userfile']['size'] . "\r\n" . $_FILES['userfile']['type'] ;
}
?>
if you are trying to upload file from iphone safari.
you are screwed, there is no support to upload file from iPhone safari.
<input type="FILE"/> will be disable.
Solved my own problem! Last echo line is what needed to be adjusted!
<?php
$uploaddir = './'; //Uploading to same directory as PHP file ./
$file = basename($_FILES['userfile']['name']);
$uploadFile = $file;
$randomNumber = rand(0, 99999);
$newName = $uploadDir . $randomNumber . $uploadFile;
if (is_uploaded_file($_FILES['userfile']['tmp_name'])) {
} else {
echo "Temp file not uploaded. \r\n";
}
if ($_FILES['userfile']['size']> 3000000000000000) {
exit("Your file is too large.");
}
if (move_uploaded_file($_FILES['userfile']['tmp_name'], $newName)) {
$postsize = ini_get('post_max_size'); //Not necessary, I was using these
$canupload = ini_get('file_uploads'); //server variables to see what was
$tempdir = ini_get('upload_tmp_dir'); //going wrong.
$maxsize = ini_get('upload_max_filesize');
echo "http://localhost:8888/wouldYa/images/{$randomNumber}{$file}" . "\r\n";
}
?>
Now I am in the mist of saving the Str in Xcode, to another PHP file to insert the filename to that user's section in my table, specifically the display picture section, this should be no hard and implemented :-)
If you are interested in my full source code, please let me know, I know it is not that secure yet but soon it will.
Can anyone provide me some links or examples to upload files to the HTTP server using
iphone APIs.
The code below uses HTTP POST to post NSData to a webserver. You also need minor knowledge of PHP.
NSString *urlString = #"http://yourserver.com/upload.php";
NSString *filename = #"filename";
request= [[[NSMutableURLRequest alloc] init] autorelease];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:#"POST"];
NSString *boundary = #"---------------------------14737809831466499882746641449";
NSString *contentType = [NSString stringWithFormat:#"multipart/form-data; boundary=%#",boundary];
[request addValue:contentType forHTTPHeaderField: #"Content-Type"];
NSMutableData *postbody = [NSMutableData data];
[postbody appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[[NSString stringWithFormat:#"Content-Disposition: form-data; name=\"userfile\"; filename=\"%#.jpg\"\r\n", filename] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[[NSString stringWithString:#"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[NSData dataWithData:YOUR_NSDATA_HERE]];
[postbody appendData:[[NSString stringWithFormat:#"\r\n--%#--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[request setHTTPBody:postbody];
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
returnString = [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
NSLog(#"%#", returnString);
ASIHTTPRequest is a great wrapper around the network APIs and makes it very easy to upload a file. Here's their example (but you can do this on the iPhone too - we save images to "disk" and later upload them.
ASIFormDataRequest *request = [[[ASIFormDataRequest alloc] initWithURL:url] autorelease];
[request setPostValue:#"Ben" forKey:#"first_name"];
[request setPostValue:#"Copsey" forKey:#"last_name"];
[request setFile:#"/Users/ben/Desktop/ben.jpg" forKey:#"photo"];
I used ASIHTTPRequest a lot like Jane Sales answer but it is not under development anymore and the author suggests using other libraries like AFNetworking.
Honestly, I think now is the time to start looking elsewhere.
AFNetworking works great, and let you work with blocks a lot (which is a great relief).
Here's an image upload example from their documentation page on github:
NSURL *url = [NSURL URLWithString:#"http://api-base-url.com"];
AFHTTPClient *httpClient = [[AFHTTPClient alloc] initWithBaseURL:url];
NSData *imageData = UIImageJPEGRepresentation([UIImage imageNamed:#"avatar.jpg"], 0.5);
NSMutableURLRequest *request = [httpClient multipartFormRequestWithMethod:#"POST" path:#"/upload" parameters:nil constructingBodyWithBlock: ^(id <AFMultipartFormData>formData) {
[formData appendPartWithFileData:imageData name:#"avatar" fileName:#"avatar.jpg" mimeType:#"image/jpeg"];
}];
AFHTTPRequestOperation *operation = [[AFHTTPRequestOperation alloc] initWithRequest:request];
[operation setUploadProgressBlock:^(NSUInteger bytesWritten, long long totalBytesWritten, long long totalBytesExpectedToWrite) {
NSLog(#"Sent %lld of %lld bytes", totalBytesWritten, totalBytesExpectedToWrite);
}];
[httpClient enqueueHTTPRequestOperation:operation];
This is a great wrapper, but when posting to a asp.net web page, two additional post values need to be set:
ASIFormDataRequest *request = [ASIFormDataRequest requestWithURL:url];
//ADD THESE, BECAUSE ASP.NET is Expecting them for validation
//Even if they are empty you will be able to post the file
[request setPostValue:#"" forKey:#"__VIEWSTATE"];
[request setPostValue:#"" forKey:#"__EVENTVALIDATION"];
///
[request setFile:FIleName forKey:#"fileupload_control_Name"];
[request startSynchronous];
Try this.. very easy to understand & implementation...
You can download sample code directly here https://github.com/Tech-Dev-Mobile/Json-Sample
- (void)simpleJsonParsingPostMetod
{
#warning set webservice url and parse POST method in JSON
//-- Temp Initialized variables
NSString *first_name;
NSString *image_name;
NSData *imageData;
//-- Convert string into URL
NSString *urlString = [NSString stringWithFormat:#"demo.com/your_server_db_name/service/link"];
NSMutableURLRequest *request =[[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:#"POST"];
NSString *boundary = #"14737809831466499882746641449";
NSString *contentType = [NSString stringWithFormat:#"multipart/form-data; boundary=%#",boundary];
[request addValue:contentType forHTTPHeaderField: #"Content-Type"];
//-- Append data into posr url using following method
NSMutableData *body = [NSMutableData data];
//-- For Sending text
//-- "firstname" is keyword form service
//-- "first_name" is the text which we have to send
[body appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"Content-Disposition: form-data; name=\"%#\"\r\n\r\n",#"firstname"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"%#",first_name] dataUsingEncoding:NSUTF8StringEncoding]];
//-- For sending image into service if needed (send image as imagedata)
//-- "image_name" is file name of the image (we can set custom name)
[body appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithFormat:#"Content-Disposition:form-data; name=\"file\"; filename=\"%#\"\r\n",image_name] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[#"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[NSData dataWithData:imageData]];
[body appendData:[[NSString stringWithFormat:#"\r\n--%#--\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
//-- Sending data into server through URL
[request setHTTPBody:body];
//-- Getting response form server
NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
//-- JSON Parsing with response data
NSDictionary *result = [NSJSONSerialization JSONObjectWithData:responseData options:NSJSONReadingMutableContainers error:nil];
NSLog(#"Result = %#",result);
}
This isn't an alternative solution; rather a suggestion for Brandon's popular answer (seeing as though I don't have enough rep to comment on that answer). If you're uploading large files; you're probably going to get a mmap malloc exception on account of having to read the file into memory to post it to your server.
You can tweak Brandon's code by replacing:
[request setHTTPBody:postbody];
With:
NSInputStream *stream = [[NSInputStream alloc] initWithData:postbody];
[request setHTTPBodyStream:stream];
I thought I would add some server side php code to this answer for any beginners that read this post and are struggling to figure out how to receive the file on the server side and save the file to the filesystem.
I realize that this answer does not directly answer the OP's question, but since Brandon's answer is sufficient for the iOS device side of uploading and he mentions that some knowledge of php is necessary, I thought I would fill in the php gap with this answer.
Here is a class I put together with some sample usage code. Note that the files are stored in directories based on which user is uploading them. This may or may not be applicable to your use, but I thought I'd leave it in place just in case.
<?php
class upload
{
protected $user;
protected $isImage;
protected $isMovie;
protected $file;
protected $uploadFilename;
protected $uploadDirectory;
protected $fileSize;
protected $fileTmpName;
protected $fileType;
protected $fileExtension;
protected $saveFilePath;
protected $allowedExtensions;
function __construct($file, $userPointer)
{
// set the file we're uploading
$this->file = $file;
// if this is tied to a user, link the user account here
$this->user = $userPointer;
// set default bool values to false since we don't know what file type is being uploaded yet
$this->isImage = FALSE;
$this->isMovie = FALSE;
// setup file properties
if (isset($this->file) && !empty($this->file))
{
$this->uploadFilename = $this->file['file']['name'];
$this->fileSize = $this->file['file']['size'];
$this->fileTmpName = $this->file['file']['tmp_name'];
$this->fileType = $this->file['file']['type'];
}
else
{
throw new Exception('Received empty data. No file found to upload.');
}
// get the file extension of the file we're trying to upload
$tmp = explode('.', $this->uploadFilename);
$this->fileExtension = strtolower(end($tmp));
}
public function image($postParams)
{
// set default error alert (or whatever you want to return if error)
$retVal = array('alert' => '115');
// set our bool
$this->isImage = TRUE;
// set our type limits
$this->allowedExtensions = array("png");
// setup destination directory path (without filename yet)
$this->uploadDirectory = DIR_IMG_UPLOADS.$this->user->uid."/photos/";
// if user is not subscribed they are allowed only one image, clear their folder here
if ($this->user->isSubscribed() == FALSE)
{
$this->clearFolder($this->uploadDirectory);
}
// try to upload the file
$success = $this->startUpload();
if ($success === TRUE)
{
// return the image name (NOTE: this wipes the error alert set above)
$retVal = array(
'imageName' => $this->uploadFilename,
);
}
return $retVal;
}
public function movie($data)
{
// update php settings to handle larger uploads
set_time_limit(300);
// you may need to increase allowed filesize as well if your server is not set with a high enough limit
// set default return value (error code for upload failed)
$retVal = array('alert' => '92');
// set our bool
$this->isMovie = TRUE;
// set our allowed movie types
$this->allowedExtensions = array("mov", "mp4", "mpv", "3gp");
// setup destination path
$this->uploadDirectory = DIR_IMG_UPLOADS.$this->user->uid."/movies/";
// only upload the movie if the user is a subscriber
if ($this->user->isSubscribed())
{
// try to upload the file
$success = $this->startUpload();
if ($success === TRUE)
{
// file uploaded so set the new retval
$retVal = array('movieName' => $this->uploadFilename);
}
}
else
{
// return an error code so user knows this is a limited access feature
$retVal = array('alert' => '13');
}
return $retVal;
}
//-------------------------------------------------------------------------------
// Upload Process Methods
//-------------------------------------------------------------------------------
private function startUpload()
{
// see if there are any errors
$this->checkForUploadErrors();
// validate the type received is correct
$this->checkFileExtension();
// check the filesize
$this->checkFileSize();
// create the directory for the user if it does not exist
$this->createUserDirectoryIfNotExists();
// generate a local file name
$this->createLocalFileName();
// verify that the file is an uploaded file
$this->verifyIsUploadedFile();
// save the image to the appropriate folder
$success = $this->saveFileToDisk();
// return TRUE/FALSE
return $success;
}
private function checkForUploadErrors()
{
if ($this->file['file']['error'] != 0)
{
throw new Exception($this->file['file']['error']);
}
}
private function checkFileExtension()
{
if ($this->isImage)
{
// check if we are in fact uploading a png image, if not return error
if (!(in_array($this->fileExtension, $this->allowedExtensions)) || $this->fileType != 'image/png' || exif_imagetype($this->fileTmpName) != IMAGETYPE_PNG)
{
throw new Exception('Unsupported image type. The image must be of type png.');
}
}
else if ($this->isMovie)
{
// check if we are in fact uploading an accepted movie type
if (!(in_array($this->fileExtension, $this->allowedExtensions)) || $this->fileType != 'video/mov')
{
throw new Exception('Unsupported movie type. Accepted movie types are .mov, .mp4, .mpv, or .3gp');
}
}
}
private function checkFileSize()
{
if ($this->isImage)
{
if($this->fileSize > TenMB)
{
throw new Exception('The image filesize must be under 10MB.');
}
}
else if ($this->isMovie)
{
if($this->fileSize > TwentyFiveMB)
{
throw new Exception('The movie filesize must be under 25MB.');
}
}
}
private function createUserDirectoryIfNotExists()
{
if (!file_exists($this->uploadDirectory))
{
mkdir($this->uploadDirectory, 0755, true);
}
else
{
if ($this->isMovie)
{
// clear any prior uploads from the directory (only one movie file per user)
$this->clearFolder($this->uploadDirectory);
}
}
}
private function createLocalFileName()
{
$now = time();
// try to create a unique filename for this users file
while(file_exists($this->uploadFilename = $now.'-'.$this->uid.'.'.$this->fileExtension))
{
$now++;
}
// create our full file save path
$this->saveFilePath = $this->uploadDirectory.$this->uploadFilename;
}
private function clearFolder($path)
{
if(is_file($path))
{
// if there's already a file with this name clear it first
return #unlink($path);
}
elseif(is_dir($path))
{
// if it's a directory, clear it's contents
$scan = glob(rtrim($path,'/').'/*');
foreach($scan as $index=>$npath)
{
$this->clearFolder($npath);
#rmdir($npath);
}
}
}
private function verifyIsUploadedFile()
{
if (! is_uploaded_file($this->file['file']['tmp_name']))
{
throw new Exception('The file failed to upload.');
}
}
private function saveFileToDisk()
{
if (move_uploaded_file($this->file['file']['tmp_name'], $this->saveFilePath))
{
return TRUE;
}
throw new Exception('File failed to upload. Please retry.');
}
}
?>
Here's some sample code demonstrating how you might use the upload class...
// get a reference to your user object if applicable
$myUser = $this->someMethodThatFetchesUserWithId($myUserId);
// get reference to file to upload
$myFile = isset($_FILES) ? $_FILES : NULL;
// use try catch to return an error for any exceptions thrown in the upload script
try
{
// create and setup upload class
$upload = new upload($myFile, $myUser);
// trigger file upload
$data = $upload->image(); // if uploading an image
$data = $upload->movie(); // if uploading movie
// return any status messages as json string
echo json_encode($data);
}
catch (Exception $exception)
{
$retData = array(
'status' => 'FALSE',
'payload' => array(
'errorMsg' => $exception->getMessage()
),
);
echo json_encode($retData);
}
I have made a lightweight backup method for the Mobile-AppSales app available at github
I wrote about it here http://memention.com/blog/2009/11/22/Lightweight-backup.html
Look for the - (void)startUpload method in ReportManager.m
An update to #Brandon's answer, generalized to a method
- (NSString*) postToUrl:(NSString*)urlString data:(NSData*)dataToSend withFilename:(NSString*)filename
{
NSMutableURLRequest *request= [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:#"POST"];
NSString *boundary = #"---------------------------14737809831466499882746641449";
NSString *contentType = [NSString stringWithFormat:#"multipart/form-data; boundary=%#", boundary];
[request addValue:contentType forHTTPHeaderField: #"Content-Type"];
NSMutableData *postbody = [NSMutableData data];
[postbody appendData:[[NSString stringWithFormat:#"\r\n--%#\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[[NSString stringWithFormat:#"Content-Disposition: form-data; name=\"userfile\"; filename=\"%#\"\r\n", filename] dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[#"Content-Type: application/octet-stream\r\n\r\n" dataUsingEncoding:NSUTF8StringEncoding]];
[postbody appendData:[NSData dataWithData:dataToSend]];
[postbody appendData:[[NSString stringWithFormat:#"\r\n--%#--\r\n", boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[request setHTTPBody:postbody];
NSError* error;
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:&error];
if (returnData) {
return [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
}
else {
return nil;
}
}
Invoke like so, sending data from a string:
[self postToUrl:#"<#Your url string#>"
data:[#"<#Your string to send#>" dataUsingEncoding:NSUTF8StringEncoding]
withFilename:#"<#Filename to post with#>"];