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(Perl) Xero Get Attachment (Download a Xero Attachment)

Demonstrates how to get the content of an attachment in Xero.

Note: This example requires Chilkat v9.5.0.64 or greater.

Chilkat Perl Downloads

Perl Module for Windows, Linux, Alpine Linux,
MAC OS X, Solaris, FreeBSD, OpenBSD,
Raspberry Pi and other single board computers

use chilkat();

#  Note: Requires Chilkat v9.5.0.64 or greater.

#  This requires the Chilkat API to have been previously unlocked.
#  See Global Unlock Sample for sample code.

$rest = chilkat::CkRest->new();

#  Before sending REST API calls, the REST object needs to be
#  initialized for OAuth1.
#  See Xero 2-Legged OAuth1 Setup for sample code.

#  Assuming the REST object's OAuth1 authenticator is setup, and the initial
#  connection was made, we may now send REST HTTP requests..

#  --------------------------------------------------------------
#  First get a list of attachments for a given document (in this case a Receipt).

$endPoint = "Receipts";
$receiptID = "c4f40e59-c390-0001-caff-ce731c707d00";

$sbPath = chilkat::CkStringBuilder->new();
$sbPath->Append("/api.xro/2.0/{Endpoint}/{Guid}/Attachments/");
$numReplaced = $sbPath->Replace("{Endpoint}",$endPoint);
$numReplaced = $sbPath->Replace("{Guid}",$receiptID);

$responseXml = $rest->fullRequestNoBody("GET",$sbPath->getAsString());
if ($rest->get_LastMethodSuccess() != 1) {
    print $rest->lastErrorText() . "\r\n";
    exit;
}

#  A 200 response is expected for actual success.
if ($rest->get_ResponseStatusCode() != 200) {
    print $responseXml . "\r\n";
    exit;
}

#  Examine the response.
print $responseXml . "\r\n";

#  A sample response looks like this:

#  	<Response xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
#  	  <Id>b235646f-34ac-4b15-90ce-d63267f7cd33</Id>
#  	  <Status>OK</Status>
#  	  <ProviderName>ChilkatPrivate</ProviderName>
#  	  <DateTimeUTC>2016-11-11T14:32:17.0908971Z</DateTimeUTC>
#  	  <Attachments>
#  	    <Attachment>
#  	      <AttachmentID>0edcddc8-325f-40c7-b950-8c71f14afc7c</AttachmentID>
#  	      <FileName>penguins.jpg</FileName>
#  	      <Url>http://api.xero.com/api.xro/2.0/Receipts/c4f40e59-c390-0001-caff-ce731c707d00/Attachments/penguins.jpg</Url>
#  	      <MimeType>image/jpg</MimeType>
#  	      <ContentLength>777835</ContentLength>
#  	    </Attachment>
#  	    <Attachment>
#  	      <AttachmentID>0adffdc8-325f-65c7-b950-4391f14af908</AttachmentID>
#  	      <FileName>starfish.jpg</FileName>
#  	      <Url>http://api.xero.com/api.xro/2.0/Receipts/c4f40e59-c390-0001-caff-ce731c707d00/Attachments/starfish.jpg</Url>
#  	      <MimeType>image/jpg</MimeType>
#  	      <ContentLength>24537</ContentLength>
#  	    </Attachment>
#  	  </Attachments>
#  	</Response>

$xml = chilkat::CkXml->new();
$xml->LoadXml($responseXml);

#  Iterate over the attachments and download each.
$numRecords = $xml->NumChildrenAt("Attachments");
print "Number of Attachments = " . $numRecords . "\r\n";

$sbSaveFilePath = chilkat::CkStringBuilder->new();
$sbAttachmentPath = chilkat::CkStringBuilder->new();
$attachmentData = chilkat::CkBinData->new();
$i = 0;
while ($i < $numRecords) {
    $xml->put_I($i);
    $attachmentID = $xml->getChildContent("Attachments|Attachment[i]|AttachmentID");
    $filename = $xml->getChildContent("Attachments|Attachment[i]|FileName");

    print "AttachmentID: " . $attachmentID . "\r\n";
    print "Filename: " . $filename . "\r\n";
    print "----" . "\r\n";

    #  Download this attachment.
    #  First build the path for this particular attachment by appending the FileName to the path used to get the list of attachments.
    $sbAttachmentPath->Clear();
    $sbAttachmentPath->AppendSb($sbPath);
    $sbAttachmentPath->Append($filename);

    #  Send the GET request in one call, and then get the response in the next two.
    $success = $rest->SendReqNoBody("GET",$sbAttachmentPath->getAsString());
    if ($success != 1) {
        print $rest->lastErrorText() . "\r\n";
        exit;
    }

    #  Get the response header.  If it's not a 200 success status code, then the response body does NOT contain
    #  the attachment data.
    $statusCode = $rest->ReadResponseHeader();
    if ($statusCode == -1) {
        #  We didn't get any response..
        print $rest->lastErrorText() . "\r\n";
        exit;
    }

    if ($statusCode != 200) {
        print "Response Status: " . $statusCode . "\r\n";
        $responseBody = $rest->readRespBodyString();
        if ($rest->get_LastMethodSuccess() != 1) {
            print "Failed to read the response body." . "\r\n";
        }
        else {
            print $responseBody . "\r\n";
        }

        print "Failed." . "\r\n";
        exit;
    }

    #  OK, the response header indicates the attachment content is forthcoming...
    #  There are a few ways to get the response body. If it is a very large attachment, it can be streamed directly
    #  to a file.  We'll assume it's not, so we'll get the response into a BinData object, and then save it to a file.
    $attachmentData->Clear();
    $success = $rest->ReadRespBd($attachmentData);
    if ($success != 1) {
        print $rest->lastErrorText() . "\r\n";
        exit;
    }

    #  Save the data to the file.
    $sbSaveFilePath->SetString("qa_output/");
    $sbSaveFilePath->Append($filename);
    $success = $attachmentData->WriteFile($sbSaveFilePath->getAsString());
    if ($success != 1) {
        print "Failed to save to output file." . "\r\n";
    }
    else {
        print "Saved to " . $sbSaveFilePath->getAsString() . "\r\n";
    }

    $i = $i + 1;
}


 

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