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(Go) 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.
// 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.NewRest() var success bool // 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.NewStringBuilder() 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.LastMethodSuccess() != true { fmt.Println(rest.LastErrorText()) rest.DisposeRest() sbPath.DisposeStringBuilder() return } // A 200 response is expected for actual success. if rest.ResponseStatusCode() != 200 { fmt.Println(*responseXml) rest.DisposeRest() sbPath.DisposeStringBuilder() return } // Examine the response. fmt.Println(*responseXml) // 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.NewXml() xml.LoadXml(*responseXml) // Iterate over the attachments and download each. numRecords := xml.NumChildrenAt("Attachments") fmt.Println("Number of Attachments = ", numRecords) sbSaveFilePath := chilkat.NewStringBuilder() sbAttachmentPath := chilkat.NewStringBuilder() attachmentData := chilkat.NewBinData() i := 0 for i < numRecords { xml.SetI(i) attachmentID := xml.GetChildContent("Attachments|Attachment[i]|AttachmentID") filename := xml.GetChildContent("Attachments|Attachment[i]|FileName") fmt.Println("AttachmentID: ", *attachmentID) fmt.Println("Filename: ", *filename) fmt.Println("----") // 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 != true { fmt.Println(rest.LastErrorText()) rest.DisposeRest() sbPath.DisposeStringBuilder() xml.DisposeXml() sbSaveFilePath.DisposeStringBuilder() sbAttachmentPath.DisposeStringBuilder() attachmentData.DisposeBinData() return } // 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.. fmt.Println(rest.LastErrorText()) rest.DisposeRest() sbPath.DisposeStringBuilder() xml.DisposeXml() sbSaveFilePath.DisposeStringBuilder() sbAttachmentPath.DisposeStringBuilder() attachmentData.DisposeBinData() return } if statusCode != 200 { fmt.Println("Response Status: ", statusCode) responseBody := rest.ReadRespBodyString() if rest.LastMethodSuccess() != true { fmt.Println("Failed to read the response body.") } else { fmt.Println(*responseBody) } fmt.Println("Failed.") rest.DisposeRest() sbPath.DisposeStringBuilder() xml.DisposeXml() sbSaveFilePath.DisposeStringBuilder() sbAttachmentPath.DisposeStringBuilder() attachmentData.DisposeBinData() return } // 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 != true { fmt.Println(rest.LastErrorText()) rest.DisposeRest() sbPath.DisposeStringBuilder() xml.DisposeXml() sbSaveFilePath.DisposeStringBuilder() sbAttachmentPath.DisposeStringBuilder() attachmentData.DisposeBinData() return } // Save the data to the file. sbSaveFilePath.SetString("qa_output/") sbSaveFilePath.Append(*filename) success = attachmentData.WriteFile(*sbSaveFilePath.GetAsString()) if success != true { fmt.Println("Failed to save to output file.") } else { fmt.Println("Saved to ", *sbSaveFilePath.GetAsString()) } i = i + 1 } rest.DisposeRest() sbPath.DisposeStringBuilder() xml.DisposeXml() sbSaveFilePath.DisposeStringBuilder() sbAttachmentPath.DisposeStringBuilder() attachmentData.DisposeBinData() |
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