SalesForce REST API PHP, Not able to see uploaded Attachment - php

Question

I am trying to upoad attachments to a specific case using REST API which I have successfully completed.
the files are being uploaded to that specific case. and I am using base64_encode to send binary data to SalesForce as they required the binary data to be sent.
but the issue is that when I see the files in the sales force control panel,
all the files are listed there and their size is correct, name is correct etc
but when I view/download any file uploaded with the script it doesn't open. the file shows errror.
ie. when I upload an png image with the rest API, I wont be able to open the image after downloading from the sales force control panel.
Can any one please help?
I think sales force might not decode the uploaded files back from base64_encode, is that right?
Thanks in advance
here is the code
$fp = fopen($file, 'r');
$db_img = fread($fp, filesize($file));
$db_img = addslashes($db_img);
$db_img = base64_encode($db_img);
and then after encoding I am concatenating $db_img within the body element like this
...................
...'.$db_img.'...
.................;

Answer 1

I figured it out myself. I thought I should post the answer as well. I am using the following function to add attachments to the Case Object.
No need to convert to base64 at all
public function add_attachment($case_id, $full_file_path, $file_name) {
$url = $this->instance_url."/services/data/v33.0/chatter/feed-elements";
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "POST");
$headers = array();
$headers[] = "Authorization: OAuth $this->access_token";
$headers[] = 'Content-Type: multipart/form-data; boundary=a7V4kRcFA8E79pivMuV2tukQ85cmNKeoEgJgq';
$post_text = '--a7V4kRcFA8E79pivMuV2tukQ85cmNKeoEgJgq
Content-Disposition: form-data; name="json"
Content-Type: application/json; charset=UTF-8
{
"body":{
"messageSegments":[
{
"type":"Text",
"text":"Task Attachment"
}
]
},
"capabilities":{
"content":{
"description":"Task Attachment",
"title":"'.$file_name.'"
}
},
"feedElementType":"FeedItem",
"subjectId":"'.$case_id.'"
}
--a7V4kRcFA8E79pivMuV2tukQ85cmNKeoEgJgq
Content-Disposition: form-data; name="feedElementFileUpload"; filename="'.$file_name.'"
Content-Type: image/png
'. file_get_contents($full_file_path).'
--a7V4kRcFA8E79pivMuV2tukQ85cmNKeoEgJgq--';
curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
curl_setopt($curl, CURLOPT_POST, true);
curl_setopt($curl, CURLOPT_VERBOSE, 1);
curl_setopt($curl, CURLOPT_POSTFIELDS, $post_text);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLINFO_HEADER_OUT, true);
$response_json = curl_exec($curl);
$status = curl_getinfo($curl, CURLINFO_HTTP_CODE);
//print_r($info);
if ( $status != 201 ) {
$this->errors[] = "Error: call to URL $url failed with status $status, response $json_response, curl_error " . curl_error($curl) . ", curl_errno " . curl_errno($curl);
return FALSE;
}
$this->status = $status;
$this->curl_error = curl_error($curl);
$this->curl_errno = curl_errno($curl);
return json_decode($response_json,TRUE);
}