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(Visual FoxPro) 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 ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

LOCAL loRest
LOCAL lnSuccess
LOCAL lcEndPoint
LOCAL lcReceiptID
LOCAL loSbPath
LOCAL lnNumReplaced
LOCAL lcResponseXml
LOCAL loXml
LOCAL lnNumRecords
LOCAL loSbSaveFilePath
LOCAL loSbAttachmentPath
LOCAL loAttachmentData
LOCAL i
LOCAL lcAttachmentID
LOCAL lcFilename
LOCAL lnStatusCode
LOCAL lcResponseBody

* 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.

loRest = CreateObject('Chilkat_9_5_0.Rest')

* 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).

lcEndPoint = "Receipts"
lcReceiptID = "c4f40e59-c390-0001-caff-ce731c707d00"

loSbPath = CreateObject('Chilkat_9_5_0.StringBuilder')
loSbPath.Append("/api.xro/2.0/{Endpoint}/{Guid}/Attachments/")
lnNumReplaced = loSbPath.Replace("{Endpoint}",lcEndPoint)
lnNumReplaced = loSbPath.Replace("{Guid}",lcReceiptID)

lcResponseXml = loRest.FullRequestNoBody("GET",loSbPath.GetAsString())
IF (loRest.LastMethodSuccess <> 1) THEN
    ? loRest.LastErrorText
    RELEASE loRest
    RELEASE loSbPath
    CANCEL
ENDIF

* A 200 response is expected for actual success.
IF (loRest.ResponseStatusCode <> 200) THEN
    ? lcResponseXml
    RELEASE loRest
    RELEASE loSbPath
    CANCEL
ENDIF

* Examine the response.
? lcResponseXml

* 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>

loXml = CreateObject('Chilkat_9_5_0.Xml')
loXml.LoadXml(lcResponseXml)

* Iterate over the attachments and download each.
lnNumRecords = loXml.NumChildrenAt("Attachments")
? "Number of Attachments = " + STR(lnNumRecords)

loSbSaveFilePath = CreateObject('Chilkat_9_5_0.StringBuilder')
loSbAttachmentPath = CreateObject('Chilkat_9_5_0.StringBuilder')
loAttachmentData = CreateObject('Chilkat_9_5_0.BinData')
i = 0
DO WHILE i < lnNumRecords
    loXml.I = i
    lcAttachmentID = loXml.GetChildContent("Attachments|Attachment[i]|AttachmentID")
    lcFilename = loXml.GetChildContent("Attachments|Attachment[i]|FileName")

    ? "AttachmentID: " + lcAttachmentID
    ? "Filename: " + lcFilename
    ? "----"

    * 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.
    loSbAttachmentPath.Clear()
    loSbAttachmentPath.AppendSb(loSbPath)
    loSbAttachmentPath.Append(lcFilename)

    * Send the GET request in one call, and then get the response in the next two.
    lnSuccess = loRest.SendReqNoBody("GET",loSbAttachmentPath.GetAsString())
    IF (lnSuccess <> 1) THEN
        ? loRest.LastErrorText
        RELEASE loRest
        RELEASE loSbPath
        RELEASE loXml
        RELEASE loSbSaveFilePath
        RELEASE loSbAttachmentPath
        RELEASE loAttachmentData
        CANCEL
    ENDIF

    * Get the response header.  If it's not a 200 success status code, then the response body does NOT contain
    * the attachment data.
    lnStatusCode = loRest.ReadResponseHeader()
    IF (lnStatusCode = -1) THEN
        * We didn't get any response..
        ? loRest.LastErrorText
        RELEASE loRest
        RELEASE loSbPath
        RELEASE loXml
        RELEASE loSbSaveFilePath
        RELEASE loSbAttachmentPath
        RELEASE loAttachmentData
        CANCEL
    ENDIF

    IF (lnStatusCode <> 200) THEN
        ? "Response Status: " + STR(lnStatusCode)
        lcResponseBody = loRest.ReadRespBodyString()
        IF (loRest.LastMethodSuccess <> 1) THEN
            ? "Failed to read the response body."
        ELSE
            ? lcResponseBody
        ENDIF

        ? "Failed."
        RELEASE loRest
        RELEASE loSbPath
        RELEASE loXml
        RELEASE loSbSaveFilePath
        RELEASE loSbAttachmentPath
        RELEASE loAttachmentData
        CANCEL
    ENDIF

    * 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.
    loAttachmentData.Clear()
    lnSuccess = loRest.ReadRespBd(loAttachmentData)
    IF (lnSuccess <> 1) THEN
        ? loRest.LastErrorText
        RELEASE loRest
        RELEASE loSbPath
        RELEASE loXml
        RELEASE loSbSaveFilePath
        RELEASE loSbAttachmentPath
        RELEASE loAttachmentData
        CANCEL
    ENDIF

    * Save the data to the file.
    loSbSaveFilePath.SetString("qa_output/")
    loSbSaveFilePath.Append(lcFilename)
    lnSuccess = loAttachmentData.WriteFile(loSbSaveFilePath.GetAsString())
    IF (lnSuccess <> 1) THEN
        ? "Failed to save to output file."
    ELSE
        ? "Saved to " + loSbSaveFilePath.GetAsString()
    ENDIF

    i = i + 1
ENDDO

RELEASE loRest
RELEASE loSbPath
RELEASE loXml
RELEASE loSbSaveFilePath
RELEASE loSbAttachmentPath
RELEASE loAttachmentData


 

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