To upload the image file to a web form - iphone

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.

Related

How to upload an image to .ashx url in ios

I have searched a lot on google as well as on stackoverflow but did not get any satisfactory solution which works for me.
I have to upload an image on some particular url which is ending with extension .ashx.
I have seen how to upload on php server but here i am not getting any clue.
Please help me by providing some sample code.
As per my understanding aspx is the page and the .ashx is the code file which response back the output, in string format and .ashx file is a web handler. A web handler file works just like an aspx file....
So we consider.ashx same as .aspx then this code should work for you(which is running for me for .aspx page). This is making request to .net server.
iOS
UIImage *img = [UIImage imageNamed:#"test.png"];
NSData *imageData = UIImageJPEGRepresentation ( img , 90 );
NSString *urlString =#"www.xyz.com/ImageUpload.aspx?filename=test";
NSLog(#"IMAGE_UPLOAD_URL -------------> %#",urlString);
NSMutableURLRequest *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" ];
/*  body of the post */
NSMutableData *body = [ NSMutableData data ];
[body appendData :[ NSData dataWithData :imageData]];
[request setHTTPBody :body];
NSData *returnData = [ NSURLConnection sendSynchronousRequest :request returningResponse : nil error : nil ];
NSString *returnString = [[ NSString alloc ] initWithData :returnData encoding : NSUTF8StringEncoding ];
InfoLog(#"_______ IMAGE_UPLOAD response -------------> .%#.",returnString);
.NET
Retrieving image like this for .aspx page
if (Request.QueryString["filename"] != null)
{
string filename = Request.QueryString["filename"].ToString();
string saveFilePath = ConfigurationManager.AppSettings["CPSBImageFolder"].ToString();
//string saveFilePath = Server.MapPath("~/images");
saveFilePath = saveFilePath + filename;
Stream objStream = Request.InputStream;
StreamReader objStreamReader = new StreamReader(objStream);
Image image = Image.FromStream(objStreamReader.BaseStream, true);
ImageCodecInfo[] info = ImageCodecInfo.GetImageEncoders();
EncoderParameters param = new EncoderParameters(1);
param.Param[0] = new EncoderParameter(System.Drawing.Imaging.Encoder.Quality, 100L);
image.Save(saveFilePath, info[1], param);
Response.Write("true");
}
Not sure but hope this give you a clue.
Verify that the variable(NSData) you are using to upload image is not null & your dot net server is receiving request.

cant upload picture using Base64 in iphone app

i ask this before in this forum but it was closed i dont know why, so i post my question again.
in an iphone app i have to upload a picture using Base64 encoding, but when i look in the server the picture is all white ( size = 0x0 ,54 KO ), im sure that my Base64 encode of my pic is correct because i have a php script ,i use it and the picture appear normally.
here is the php code used to upload :
<?php
$filename = "photo_to_upload.jpg";
$handle = fopen($filename, "r");
$imgbinary = fread($handle, filesize($filename));
$data = base64_encode($imgbinary);
fclose($handle);
?>
<img src="./<?php echo $filename ?>" />
<form action="http://host" method="POST">
<input type="hidden" name="data" value="<?php echo $data?>">
<input type="submit" value="envoyer" />
</form>
and the Xcode i use this :
NSString *filePath = [[NSBundle mainBundle] pathForResource:#"photo_to_upload" ofType:#"jpg"];
NSURL *url = [NSURL fileURLWithPath:filePath];
NSData *imageData = [NSData dataWithContentsOfURL:url];
NSURLResponse* response;
NSError* error=nil;
NSMutableData *postData=[[NSMutableData alloc]init];
[postData appendData:[#"data=" dataUsingEncoding:NSUTF8StringEncoding]];
[postData appendData:[self base64forData:imageData]];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:#"HOST"]];
[request setHTTPMethod:#"POST"];
[request setValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Content-Type"];
[request setValue:postLength forHTTPHeaderField:#"Content-Length"];
[request setHTTPBody:postData];
[[NSURLConnection alloc] initWithRequest:request delegate:self];
think you for any help.
I too face the same Issue Red Mak Answer Helped me.
Answer That Helped
SOLVED !!! in fact the problem was that server encode the request replacing the blanc with "+" after that it decode replacing the "+" with blanc ,but in Base64 we have allot of "+" ,the first step server do nothing( no blanc find) but in the seconde it replace the "+" and that give a wrong base64 code ,
to solve that i replac "+" with ASCII equivalente like this
:[[self base64forData:imageData]stringByReplacingOccurrencesOfString:#"+" withString:#"%2B"].
I assume your postLength is probably wrong (you're not showing how it was calculated and what type it is). Do this instead:
[request
setValue:[NSString stringWithFormat:#"%u", [postData length]]
forHTTPHeaderField:#"Content-Length"
];

Upload Photo from iPhone to Rails server with attachment_fu

I think I've been able to send a photo from the iPhone to Rails using the Multipart format, but once the photo gets to the Rails server, I can't figure out how to save it correctly. I think the file shows up in the params on the Rails server as "userfile" at the end of the Parameters below when iphone_photo_to_website is called:
Parameters: {"action"=>"iphone_photo_to_website","id"=>"8A39FA8F_1ADD_52AB_8387_E1C5CFC4AB2D", "controller"=>"users", "userfile"=>#<File:/tmp/RackMultipart30053-0>}
I send the photo from the iPhone using the following Objective-C code from the following SO question:
How can I upload a photo to a server with the iPhone?
NSString *imagePath = [[NSBundle mainBundle] pathForResource:#"logo1" ofType:#"png"];
NSData *imageData = [NSData dataWithContentsOfFile:imagePath];
NSString *urlString = [NSString stringWithFormat:#"%#/users/iphone_photo_to_website/%#",
serverString, UID];
NSMutableURLRequest *imageRequest = [[NSMutableURLRequest alloc] init] ;
[imageRequest setURL:[NSURL URLWithString:urlString]];
[imageRequest setHTTPMethod:#"POST"];
NSString *boundary = [NSString stringWithString:#"---------------------------14737809831466499882746641449"];
NSString *contentType = [NSString stringWithFormat:#"multipart/form-data; boundary=%#",boundary];
[imageRequest setValue:contentType forHTTPHeaderField: #"Content-Type"];
NSMutableData *body = [NSMutableData dataWithCapacity:[imageData length] + 512];
[body appendData:[[NSString stringWithFormat:#"--%#\r\n",boundary] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:#"Content-Disposition: form-data; name=\"userfile\"; filename=\"logo1.png\"\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];
[body appendData:[[NSString stringWithString:#"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]];
[imageRequest setHTTPBody:body];
theConnection = [[NSURLConnection alloc] initWithRequest:imageRequest
delegate:self];
On the Rails server the photo migration in db/migrate looks like:
class CreatePhotos < ActiveRecord::Migration
def self.up
create_table :photos do |t|
t.column :user_id, :integer
t.column :title, :string
t.column :body, :text
t.column :created_at, :datetime
# the following are for attachment_fu
t.column :photo, :binary
t.column :content_type, :string
t.column :filename, :string
t.column :size, :integer
t.column :parent_id, :integer
t.column :thumbnail, :string
t.column :width, :integer
t.column :height, :integer
end
end
def self.down
drop_table :photos
end
end
On the Rails server I have a Photo model app/models/photo.rb with the following code:
class Photo < ActiveRecord::Base
has_attachment :storage => :file_system,
:resize_to => '640x480',
:thumbnails => { :thumb => '160x120', :tiny => '50>' },
:max_size => 5.megabytes,
:content_type => :image,
:processor => 'Rmagick'
validates_as_attachment
belongs_to :user
end
And the Rails controller has the following code:
def iphone_photo_to_website
#udid = params[:id]
#userfile = params[:userfile]
#photo_params = { :user_id => #user.id,
:photo => #userfile,
:content_type => 'image',
:filename => #userfile.original_path,
:uploaded_data => #userfile
}
image = Photo.new(#photo_params)
image.save
end
When "image.save" executes, it returns "false". Does anyone know how I can find what error is causing image.save to return false? Or does anyone know how I can save the photo correctly in the database?
I was finally able to save the image to the database using the following code:
#userfile = params[:userfile]
image = Photo.new(:uploaded_data => params[:userfile])
image.user_id = #user.id
image.photo = #userfile
image.width = 105
image.height = 104
basename = File.basename(image.filename).gsub(/[^\w._-]/, '')
image.content_type = "image/" + basename.split("\.")[1]
image.save
When the image is created as a Photo.new using the uploaded_data field, the image.filename gets set.
I also had to remove the following line from the Objective-C code on the iPhone to get things to work.
[body appendData:[[NSString stringWithString:#"Content-Type: application/octet-stream\r\n\r\n"] dataUsingEncoding:NSUTF8StringEncoding]];

A better way to create the body of a NSMutableURLRequest

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.

File Upload to HTTP server in iphone programming

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#>"];