如何在讀取<code>AttachmentContent</code>對象後讀取附件內容的缺陷

Question

使用Rally Java Rest API如何獲取保存內容的字節？

Answer 1

您可能會發現以下示例對於您想要執行的操作很有用。這是針對用戶故事而不是缺陷，但對於缺陷，該過程將是相同的。

import com.google.gson.JsonArray; 
import com.google.gson.JsonElement; 
import com.google.gson.JsonObject; 
import com.rallydev.rest.RallyRestApi; 
import com.rallydev.rest.request.CreateRequest; 
import com.rallydev.rest.request.DeleteRequest; 
import com.rallydev.rest.request.GetRequest; 
import com.rallydev.rest.request.QueryRequest; 
import com.rallydev.rest.request.UpdateRequest; 
import com.rallydev.rest.response.CreateResponse; 
import com.rallydev.rest.response.DeleteResponse; 
import com.rallydev.rest.response.GetResponse; 
import com.rallydev.rest.response.QueryResponse; 
import com.rallydev.rest.response.UpdateResponse; 
import com.rallydev.rest.util.Fetch; 
import com.rallydev.rest.util.QueryFilter; 
import com.rallydev.rest.util.Ref; 

import java.io.FileOutputStream; 
import java.io.OutputStream; 
import java.io.RandomAccessFile; 
import java.io.IOException; 
import java.net.URI; 
import java.net.URISyntaxException; 

import org.apache.commons.codec.binary.Base64; 
public class RestExample_DownloadAttachment { 

public static void main(String[] args) throws URISyntaxException, IOException { 

    // Create and configure a new instance of RallyRestApi 
    // Connection parameters 
    String rallyURL = "https://rally1.rallydev.com"; 
    String wsapiVersion = "1.43"; 
    String applicationName = "RestExample_DownloadAttachment"; 

    // Credentials 
    String userName = "user@company.com"; 
    String userPassword = "topsecret"; 

    RallyRestApi restApi = new RallyRestApi(
    new URI(rallyURL), 
    userName, 
    userPassword 
    ); 
    restApi.setWsapiVersion(wsapiVersion); 
    restApi.setApplicationName(applicationName);  

    // Workspace and Project Settings 
    String myWorkspace = "My Workspace"; 
    String myProject = "My Project"; 

    // FormattedID of Existing Test Case to Query 
    String existStoryFormattedID = "US43";  

    // Get reference to Workspace of interest 
    QueryRequest workspaceRequest = new QueryRequest("Workspace"); 
    workspaceRequest.setFetch(new Fetch("Name", "Owner", "Projects")); 
    workspaceRequest.setQueryFilter(new QueryFilter("Name", "=", myWorkspace)); 
    QueryResponse workspaceQueryResponse = restApi.query(workspaceRequest); 
    String workspaceRef = workspaceQueryResponse.getResults().get(0).getAsJsonObject().get("_ref").toString(); 

    // Get reference to Project of interest 
    QueryRequest projectRequest = new QueryRequest("Project"); 
    projectRequest.setFetch(new Fetch("Name", "Owner", "Projects")); 
    projectRequest.setQueryFilter(new QueryFilter("Name", "=", myProject)); 
    QueryResponse projectQueryResponse = restApi.query(projectRequest); 
    String projectRef = projectQueryResponse.getResults().get(0).getAsJsonObject().get("_ref").toString();  

    // Query for existing User Story 
    System.out.println("Querying for User Story: " + existStoryFormattedID); 

    QueryRequest existUserStoryRequest = new QueryRequest("HierarchicalRequirement"); 
    existUserStoryRequest.setFetch(new Fetch("FormattedID","Name","Attachments")); 
    existUserStoryRequest.setQueryFilter(new QueryFilter("FormattedID", "=", existStoryFormattedID)); 
    QueryResponse userStoryQueryResponse = restApi.query(existUserStoryRequest); 
    JsonObject existUserStoryJsonObject = userStoryQueryResponse.getResults().get(0).getAsJsonObject(); 
    String existUserStoryRef = userStoryQueryResponse.getResults().get(0).getAsJsonObject().get("_ref").toString(); 
    JsonArray attachmentsJsonArray = existUserStoryJsonObject.getAsJsonArray("Attachments"); 

    // Take first attachment 
    JsonObject attachmentObject = attachmentsJsonArray.get(0).getAsJsonObject(); 
    String attachmentRef = attachmentObject.get("_ref").toString(); 

    // Read attachment from Ref 
    System.out.println("Reading First Attachment: " + attachmentRef); 

    GetRequest attachmentRequest = new GetRequest(attachmentRef); 
    attachmentRequest.setFetch(new Fetch("Name","Content")); 
    GetResponse attachmentResponse = restApi.get(attachmentRequest); 

    // AttachmentContent object 
    JsonObject attachmentContentObject = attachmentResponse.getObject().get("Content").getAsJsonObject(); 
    String attachmentContentRef = attachmentContentObject.get("_ref").toString(); 

    // Read Content from Ref 
    System.out.println("Reading Attachment Content: " + attachmentRef); 

    GetRequest contentRequest = new GetRequest(attachmentContentRef); 
    contentRequest.setFetch(new Fetch("Content")); 
    GetResponse contentResponse = restApi.get(contentRequest);  

    // Read Content String of AttachmentContent 
    String attachmentContentBase64String = contentResponse.getObject().get("Content").getAsString(); 

    // Grab attachment name 
    String attachmentName = attachmentResponse.getObject().get("Name").getAsString();   

    // Decode base64 string into bytes 
    byte[] imageBytes = Base64.decodeBase64(attachmentContentBase64String); 

    // Image output 
    String imageFilePath = "/Users/username/Desktop/"; 
    String fullImageFile = imageFilePath + attachmentName; 

    // Write output file 
    System.out.println("Writing attachment to file: " + attachmentName); 
    try {   

    OutputStream imageOutputStream = new FileOutputStream(fullImageFile); 
    imageOutputStream.write(imageBytes); 
    imageOutputStream.flush(); 
    imageOutputStream.close(); 

    } catch (Exception e) { 
     System.out.println("Exception occurred while write image file "); 
     e.printStackTrace();    
    } 

    finally { 
    //Release all resources 
    restApi.close(); 
    }     
} 
}