Send file via cURL from form POST in PHP

Question

I m writing an API and I m wanting to handle file uploads from a form POST  The markup for the form is nothing too complex    lt form action    method  post  enctype  multipart form-data  gt     lt fieldset gt       lt input type  file  name  image  id  image    gt       lt input type  submit  name  upload  value  Upload    gt     lt  fieldset gt   lt  form gt    However  I m having difficulties understanding how to handle this server-side and send along with a cURL request   I m familiar with sending POST requests with cURL with a data array  and resources I ve read on uploading files tell me to prefix the filename with an   symbol  But these same resources have a hard-coded file name  e g    post   array       image    gt     path to myfile jpg                Well which file path is this  Where would I find it  Would it be something like   FILES  image    tmp name    in which case my  post array should look like this    post   array       image    gt          FILES  image    tmp name                 Or am I going about this the wrong way  Any advice would be most appreciated   EDIT  If someone could give me a code snippet of where I would go with the following code snippets then I d be most grateful  I m mainly after what I would send as cURL parameters  and a sample of how to use those parameters with the receiving script  let s call it curl receiver php for argument s sake    I have this web form    lt form action  script php  method  post  enctype  multipart form-data  gt     lt fieldset gt       lt input type  file  name  image   gt       lt input type  submit  name  upload  value  Upload    gt     lt  fieldset gt   lt  form gt    And this would be script php   if  isset   POST  upload              cURL call would go here        my tmp  file would be   FILES  image    tmp name    and        the filename would be   FILES  image    name

User · Answer

This should work    tmpfile     FILES  image    tmp name     filename   basename   FILES  image    name       data   array       uploaded file    gt       tmpfile   filename    filename       ch   curl init       curl setopt  ch  CURLOPT POSTFIELDS   data      set your other cURL options here  url  etc    curl exec  ch     In the receiving script  you would have   print r   FILES      which would output something like      Array            uploaded file    gt  Array                tmp name    gt   tmp f87453hf              name    gt  myimage jpg              error    gt  0              size    gt  12345              type    gt  image jpeg                       Then  if you want to properly handle the file upload  you would do something like this   if  move uploaded file   FILES  uploaded file      path to destination file zip            do stuff

User · Answer

It works for me when sending an attachment to Mercadolibre  through its messaging system   The anwswer https   stackoverflow com a 35227055 7656744   target url    http   server port xxxxx php               fname    file txt       cfile   new CURLFile realpath  fname          post   array                  file    gt   cfile                        ch   curl init    curl setopt  ch  CURLOPT URL   target url   curl setopt  ch  CURLOPT POST  1   curl setopt  ch  CURLOPT HEADER  0   curl setopt  ch  CURLOPT RETURNTRANSFER  1    curl setopt  ch  CURLOPT USERAGENT   Mozilla 4 0  compatible         curl setopt  ch  CURLOPT HTTPHEADER array  Content-Type  multipart form-data     curl setopt  ch  CURLOPT FRESH CONNECT  1      curl setopt  ch  CURLOPT FORBID REUSE  1     curl setopt  ch  CURLOPT TIMEOUT  100   curl setopt  ch  CURLOPT POSTFIELDS   post     result   curl exec   ch    if   result     FALSE        echo  Error sending     fname          curl error  ch       curl close   ch    else      curl close   ch       echo   Result       result

User · Answer

For my the   symbol did not work  so I do some research and found this way and it work for me  I hope this help you        target url    http   server port xxxxx php                   fname    file txt           cfile   new CURLFile realpath  fname              post   array                      file    gt   cfile                                ch   curl init        curl setopt  ch  CURLOPT URL   target url       curl setopt  ch  CURLOPT POST  1       curl setopt  ch  CURLOPT HEADER  0       curl setopt  ch  CURLOPT RETURNTRANSFER  1        curl setopt  ch  CURLOPT USERAGENT   Mozilla 4 0  compatible             curl setopt  ch  CURLOPT HTTPHEADER array  Content-Type  multipart form-data         curl setopt  ch  CURLOPT FRESH CONNECT  1          curl setopt  ch  CURLOPT FORBID REUSE  1         curl setopt  ch  CURLOPT TIMEOUT  100       curl setopt  ch  CURLOPT POSTFIELDS   post         result   curl exec   ch        if   result     FALSE            echo  Error sending     fname          curl error  ch           curl close   ch        else          curl close   ch           echo   Result       result

User · Answer

we can upload image file by curl request by converting it base64 string So in post we will send file string and then covert this in an image   function covertImageInBase64         var imageFile   document getElementById  imageFile   files      if  imageFile length  gt  0                var imageFileUpload   imageFile 0           var readFile   new FileReader            readFile onload   function fileLoadedEvent                         var base64image   document getElementById  image                base64image value   fileLoadedEvent target result                     readFile readAsDataURL imageFileUpload             then send it in curl request  if isset   POST  image           curlUrl  localhost curlfile php          ch   curl init        curl setopt  ch CURLOPT URL   curlUrl       curl setopt  ch CURLOPT POST  1       curl setopt  ch CURLOPT POSTFIELDS   image     POST  image          result   curl exec  ch       curl close  ch       see here http   technoblogs co in blog How-to-upload-an-image-by-using-php-curl-request 118

User · Answer

Here is some production code that sends the file to an ftp  may be a good solution for you       This is the entire file that was uploaded to a temp location   localFile     FILES  fileKey   tmp name       fp   fopen  localFile   r        Connecting to website   ch   curl init     curl setopt  ch  CURLOPT USERPWD   email email org password    curl setopt  ch  CURLOPT URL   ftp    ftp website net audio      strFileName   curl setopt  ch  CURLOPT UPLOAD  1   curl setopt  ch  CURLOPT TIMEOUT  86400      1 Day Timeout curl setopt  ch  CURLOPT INFILE   fp   curl setopt  ch  CURLOPT NOPROGRESS  false   curl setopt  ch  CURLOPT PROGRESSFUNCTION   CURL callback    curl setopt  ch  CURLOPT BUFFERSIZE  128   curl setopt  ch  CURLOPT INFILESIZE  filesize  localFile    curl exec   ch    if  curl errno  ch           msg   curl error  ch     else         msg    File uploaded successfully       curl close   ch     return   array  msg    gt   msg    echo json encode  return

User · Answer

For people finding this post and using PHP5 5   this might help   I was finding the approach suggested by netcoder wasn t working  i e  this didn t work    tmpfile     FILES  image    tmp name     filename   basename   FILES  image    name      data   array       uploaded file    gt       tmpfile   filename    filename      ch   curl init       curl setopt  ch  CURLOPT POSTFIELDS   data     I would receive in the   POST var the  uploaded file  field - and nothing in the   FILES var   It turns out that for php5 5  there is a new curl file create   function you need to use  So the above would become    data   array       uploaded file    gt  curl file create  tmpfile    FILES  image    type     filename       As the   format is now deprecated

User · Answer

cURL file object in procedural method     file   curl file create  full path filename   extension   filename         cURL file object in Oop method     file   new CURLFile  full path filename   extension   filename      post  array  file    gt   file     curl   curl init        curl setopt      curl setopt  curl  CURLOPT POSTFIELDS   data    response   curl exec  curl   curl close  curl

User · Answer

Here is my solution  i have been reading a lot of post and they was really helpfull  finaly i build a code for small files  with cUrl and Php  that i think its really usefull   public function postFile                file url    test txt      here is the file route  in this case is on same directory but you can set URL too like  http   examplewebsite com test txt           eol     r n     default line-break for mime type          BOUNDARY   md5 time       random boundaryid  is a separator for each param on my post curl function          BODY       init my curl body          BODY    --   BOUNDARY   eol    start param header          BODY     Content-Disposition  form-data  name  sometext      eol    eol     last Content with 2  eol  in this case is only 1 content           BODY     Some Data     eol   param data in this case is a simple post data and 1  eol for the end of the data          BODY    --   BOUNDARY   eol     start 2nd param           BODY    Content-Disposition  form-data  name  somefile   filename  test txt     eol     first Content data for post file  remember you only put 1 when you are going to add more Contents  and 2 on the last  to close the Content Instance          BODY    Content-Type  application octet-stream     eol    Same before row          BODY    Content-Transfer-Encoding  base64     eol    eol     we put the last Content and 2  eol           BODY   chunk split base64 encode file get contents  file url       eol     we write the Base64 File Content and the  eol to finish the data           BODY    --   BOUNDARY   --     eol   eol     we close the param and the post width  --  and 2  eol at the end of our boundary header              ch   curl init      init curl         curl setopt  ch  CURLOPT HTTPHEADER  array                            X PARAM TOKEN   71e2cb8b-42b7-4bf0-b2e8-53fbd2f578f9    custom header for my api validation you can get it from   SERVER  HTTP X PARAM TOKEN   variable                            Content-Type  multipart form-data  boundary    BOUNDARY    setting our mime type for make it work on   FILE variable                                curl setopt  ch  CURLOPT USERAGENT   Mozilla 1 0  Windows NT 6 1  WOW64  rv 28 0  Gecko 20100101 Firefox 28 0      setting our user agent         curl setopt  ch  CURLOPT URL   api endpoint post      setting our api post url         curl setopt  ch  CURLOPT COOKIEJAR   BOUNDARY   txt      saving cookies just in case we want         curl setopt   ch  CURLOPT RETURNTRANSFER  1      call return content         curl setopt   ch  CURLOPT FOLLOWLOCATION  1   navigate the endpoint         curl setopt  ch  CURLOPT POST  true     set as post         curl setopt  ch  CURLOPT POSTFIELDS   BODY      set our  BODY             response   curl exec  ch      start curl navigation       print r  response     print response      With this we shoud be get on the  api endpoint post  the following vars posted  You can easly test with this script  and you should be recive this debugs on the function postFile   at the last row   print r  response     print response  public function getPostFile          echo   n n SERVER n       echo   lt pre gt        print r   SERVER  HTTP X PARAM TOKEN         echo    lt pre gt        echo   POST n       echo   lt pre gt        print r   POST  sometext         echo    lt pre gt        echo   FILES n       echo   lt pre gt        print r   FILEST  somefile         echo    lt pre gt        Here you are it should be work good  could be better solutions but this works and is really helpfull to understand how the Boundary and multipart from-data mime works on php and curl library   My Best Reggards    my apologies about my english but isnt my native language

[php] Send file via cURL from form POST in PHP

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