File Upload to HTTP server in iphone programming

Question

Can anyone provide me some links or examples to upload files to the HTTP server using    iphone APIs

User · Answer

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

User · Answer

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

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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

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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

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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  lt AFMultipartFormData gt 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

User · Answer

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    lt  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- gt file    file          if this is tied to a user  link the user account here      this- gt user    userPointer          set default bool values to false since we don t know what file type is being uploaded yet      this- gt isImage     FALSE       this- gt isMovie     FALSE          setup file properties     if  isset  this- gt file   amp  amp   empty  this- gt file                     this- gt uploadFilename      this- gt file  file    name             this- gt fileSize            this- gt file  file    size             this- gt fileTmpName         this- gt file  file    tmp name             this- gt fileType            this- gt 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- gt uploadFilename        this- gt fileExtension          strtolower end  tmp          public function image  postParams           set default error alert  or whatever you want to return if error       retVal   array  alert    gt   115            set our bool      this- gt isImage   TRUE          set our type limits      this- gt allowedExtensions      array  png            setup destination directory path  without filename yet       this- gt uploadDirectory        DIR IMG UPLOADS  this- gt user- gt uid   photos            if user is not subscribed they are allowed only one image  clear their folder here     if   this- gt user- gt isSubscribed      FALSE                 this- gt clearFolder  this- gt uploadDirectory                 try to upload the file      success    this- gt startUpload         if   success     TRUE                   return the image name  NOTE  this wipes the error alert set above           retVal   array                           imageName    gt    this- gt 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    gt   92            set our bool      this- gt isMovie   TRUE          set our allowed movie types      this- gt allowedExtensions   array  mov    mp4    mpv    3gp            setup destination path      this- gt uploadDirectory   DIR IMG UPLOADS  this- gt user- gt uid   movies            only upload the movie if the user is a subscriber     if   this- gt user- gt isSubscribed                     try to upload the file          success    this- gt startUpload             if   success     TRUE                           file uploaded so set the new retval              retVal   array  movieName    gt   this- gt uploadFilename                       else                  return an error code so user knows this is a limited access feature          retVal   array  alert    gt   13               return  retVal          -------------------------------------------------------------------------------                             Upload Process Methods   -------------------------------------------------------------------------------  private function startUpload            see if there are any errors      this- gt checkForUploadErrors            validate the type received is correct      this- gt checkFileExtension            check the filesize      this- gt checkFileSize            create the directory for the user if it does not exist      this- gt createUserDirectoryIfNotExists            generate a local file name      this- gt createLocalFileName            verify that the file is an uploaded file      this- gt verifyIsUploadedFile            save the image to the appropriate folder      success    this- gt saveFileToDisk            return TRUE FALSE     return  success     private function checkForUploadErrors         if   this- gt file  file    error      0                throw new Exception  this- gt file  file    error              private function checkFileExtension         if   this- gt isImage                   check if we are in fact uploading a png image  if not return error         if    in array  this- gt fileExtension   this- gt allowedExtensions       this- gt fileType     image png     exif imagetype  this- gt fileTmpName     IMAGETYPE PNG                        throw new Exception  Unsupported image type  The image must be of type png                         else if   this- gt isMovie                   check if we are in fact uploading an accepted movie type         if    in array  this- gt fileExtension   this- gt allowedExtensions       this- gt fileType     video mov                         throw new Exception  Unsupported movie type  Accepted movie types are  mov   mp4   mpv  or  3gp                          private function checkFileSize         if   this- gt isImage                if  this- gt fileSize  gt  TenMB                        throw new Exception  The image filesize must be under 10MB                         else if   this- gt isMovie                if  this- gt fileSize  gt  TwentyFiveMB                         throw new Exception  The movie filesize must be under 25MB                        private function createUserDirectoryIfNotExists         if   file exists  this- gt uploadDirectory                  mkdir  this- gt uploadDirectory  0755  true             else               if   this- gt isMovie                           clear any prior uploads from the directory  only one movie file per user               this- gt clearFolder  this- gt uploadDirectory                      private function createLocalFileName          now   time            try to create a unique filename for this users file     while file exists  this- gt uploadFilename    now  -   this- gt uid      this- gt fileExtension                  now                  create our full file save path      this- gt saveFilePath    this- gt uploadDirectory  this- gt 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  gt  npath                         this- gt clearFolder  npath                rmdir  npath                      private function verifyIsUploadedFile         if    is uploaded file  this- gt file  file    tmp name                   throw new Exception  The file failed to upload               private function saveFileToDisk         if  move uploaded file  this- gt file  file    tmp name     this- gt saveFilePath                 return TRUE                  throw new Exception  File failed to upload  Please retry              gt    Here s some sample code demonstrating how you might use the upload class        get a reference to your user object if applicable  myUser    this- gt 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- gt image           if uploading an image      data     upload- gt movie            if uploading movie         return any status messages as json string     echo json encode  data      catch  Exception  exception          retData   array               status       gt   FALSE                payload      gt  array                               errorMsg    gt   exception- gt getMessage                                                          echo json encode  retData

User · Answer

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

User · Answer

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  amp error       if  returnData            return   NSString alloc  initWithData returnData encoding NSUTF8StringEncoding             else           return nil            Invoke like so  sending data from a string    self postToUrl    lt  Your url string  gt              data     lt  Your string to send  gt   dataUsingEncoding NSUTF8StringEncoding     withFilename    lt  Filename to post with  gt

User · Answer

Try this   very easy to understand  amp  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

[iphone] File Upload to HTTP server in iphone programming

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