I could still use help on this. I've moved on to other tasks but I will come back to this if I ever get an answer to this. It would be a nice way to incorporate Yahoo users into our product more.

Can you please urlencode mid and try it again. Thanks.

--R

urlencoding the $mid did not change the value of the mid as it has no characters that need urlencoding and hence still leaves me with a 404 error.

Does anybody have working example PHP code for a download attachment?

Hi,

I am giving an outline of a standard download request. I hope this helps.

$endPointDownload = 'http://mail.yahooapis.com/ya/download';

//Create your Download request query string.
$queryString = $endPointDownload . "?";
$queryString .= "mid=".urlencode($midRequest);
$queryString .= "&fid=Inbox";
$queryString .= "&pid=2";
$queryString .= "&clean=0";
$queryString .= "&output=xml";

//if needed.
$downloadheader = new stdclass(); // hold this for loading content-disposition, content-length and error if any.

//OAuth header for download request
$request_args = array(
'oauth_nonce'=>mt_rand(),
'oauth_timestamp'=>time(),
'oauth_version'=>'1.0',
'oauth_signature_method'=>'HMAC-SHA1',
'oauth_consumer_key'=>$OAuthConsumerKey,
'oauth_token'=>$oauth_token,
'mid'=>$midRequest, // Make sure its the correct mid.
'fid'=>'Inbox', // Folder id
'pid'=>'2', // part id.
'clean'=>'0',
'output'=>'xml'
);

//Note its a GET
$request = new OAuthRequest('GET', "$endPointDownload", $request_args);
$request->sign_request($signature, new OAuthConsumer('', $OAuthConsumerSecret), new OAuthToken('', $oauth_token_secret));
$oauthHeaderForDownloadJson = $request->to_header();

//Do curl_exec
$ch = curl_init($queryString);
curl_setopt($ch,CURLOPT_HTTPHEADER,array($oauthHeaderForDownloadJson));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_HEADERFUNCTION, "readDownloadHeader");
curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
curl_setopt($ch, CURLOPT_VERBOSE, 1);
$rawresponse = curl_exec($ch);
var_dump($rawresponse);

//Get downloaded data
$response = new stdclass();
$response->body = $rawresponse;
$response->code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
$response->contenttype = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
$response->contentlength = curl_getinfo($ch, CURLINFO_CONTENT_LENGTH_DOWNLOAD);
response->lasteffectiveurl = curl_getinfo($ch, CURLINFO_EFFECTIVE_URL);
$response->contentdisposition = isset($downloadheader->contentdisposition)? $downloadheader->contentdisposition : "";
$response->headercontentlength = isset($downloadheader->contentlength)? $downloadheader->contentlength : 0;
$response->errormessage = isset($downloadheader->errormessage)? $downloadheader->errormessage : "";
var_dump($response);

function readHeaderInformation($ch, $header) {
//read from header if needed - info like conten-tdisposition, content-length and error-message
//$downloadheader->contentdisposition, $downloadheader->contentlength, $downloadheader->errormessage
}

--R

Sadly... even your example results in 404 errors. Does it work for you?

Yep, same here. I read somewhere that DownloadAttachment is only available for premium accounts?!?
http://www.scribd.com/doc/49879097/26/DownloadAttachment

Cheers,
Slavik

"I read somewhere that DownloadAttachment is only available for premium accounts?!?"
No. Download and Upload both are supported for normal accounts.

@John : Can you paste your entire code? The previous code you posted has differences with the one I had given. If it doesn't work for you put var_dumps/debug stmts in each step and tell me where it fails.

Few corrections in your previous code
1. Urlencode the mid
2. Do to_header() instead of to_url().
3. Make sure your value of pid,mid and fid are correct and add &clean and &output=xml also to the query args.

Use the same curl code as below.
$ch = curl_init($queryString);
curl_setopt($ch,CURLOPT_HTTPHEADER,array($oauthHeaderForDownloadJson));
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
curl_setopt($ch, CURLOPT_HEADERFUNCTION, "readDownloadHeader");
curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
curl_setopt($ch, CURLOPT_VERBOSE, 1);
$rawresponse = curl_exec($ch);

--R

In general, I had the most trouble spotting and fixing percent encoding related problems. Specifically:

 - ListMessages() does _not_ return message ID as a percent encoded string (even though folderID returned in the same call _is_ percent encoded), so you need to so that yourself (as Ram also mentioned)

 - If you are refreshing your OAuth access token, it _is_ returned percent encoded, so you need to make sure you don't encode it twice when you use it for API calls.

I really wish the Yahoo Mail documentation had done a better job documenting which strings are returned percent encoded and which ones are not. This has been a huge source of problems and a time sink to spot/debug.

Rajesh

Hello, i have tried the above sample code, but same problem.......
whyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy....
i need help.

Hello,
http://developer.yahoo.com/mail/account_types.html 
the link above shows that non-premium accounts can't access downloadattachments, uploadattachment.

Non-premium accounts can access Upload and Download Attachment APIs. Thank you.

Did the DownloadAttachment API still work?
I use Ram's sample code, but it keeps geting 404.
Did I miss something?

Header:

Did the DownloadAttachment API still work?
Yes. It works.

Are you resigning the request for download endpoint? 
What does the request and response payload look like? 

--Ram