Detección o análisis de texto en un documento de varias páginas

Para detectar o analizar texto en un documento de varias páginas

1. Configure el acceso de usuario a Amazon Textract y configure el acceso de Amazon Textract Texact a Amazon SNS. Para obtener más información, consulte Configuración de Amazon Textract Texact para operaciones asíncronas. Para completar este procedimiento, se necesita un archivo de documento de varias páginas en formato PDF. Omita los pasos 3 a 6, ya que el código de ejemplo crea y configura el tema de Amazon SNS y la cola de Amazon SQS. Si es complejotEn el ejemplo de la CLI, no es necesario configurar una cola de SQS.

2. Cargue un archivo de documento de varias páginas en formato PDF o TIFF a su bucket de Amazon S3. (También se pueden procesar documentos de una sola página en formato JPEG, PNG, TIFF o PDF).

   Para obtener instrucciones, consulteCarga de objetos en Amazon S3en laAmazon Simple Storage Service.

3. Utilice lo siguienteAWS SDK for Java, SDK for Python (Boto3) oAWS CLIcódigo para detectar texto o analizar texto en un documento de varias páginas. En el navegadormainfunción:

   • Sustituir el valor deroleArncon el ARN del rol de IAM que ha guardado enConceder acceso a Amazon Textract a su tema de Amazon SNS.

   • Sustituir los valores debucketydocumentcon el nombre del bucket de y el nombre del archivo de documento que especificó en el paso 2.

   • Sustituya el valor de latypeparámetro de entrada delProcessDocumentfunción con el tipo de procesamiento que desea realizar. UsarProcessType.DETECTIONpara detectar texto. UsarProcessType.ANALYSISpara analizar texto.

   • Para el ejemplo de Python, sustituya el valor deregion_namecon la región en la que opera su cliente.

   Para el registroAWS CLIejemplo, haga lo siguiente:

   • Al llamarStartDocumentTextDetection, sustituya el valor debucket-namecon el nombre de su bucket de S3 y reemplacefile-namecon el nombre del archivo que especificó en el paso 2. Especifique la región de su depósito reemplazandoregion-namecon el nombre de su región. Tenga en cuenta que el ejemplo de la CLI no utiliza SQS.

   • Al llamarGetDocumentTextDetectionreplacejob-id-numberconjob-iddevuelto porStartDocumentTextDetection. Especifique la región de su depósito reemplazandoregion-namecon el nombre de su región.

   Java

   package com.amazonaws.samples;
   
   import java.util.Arrays;
   import java.util.HashMap;
   import java.util.List;
   import java.util.Map;
   
   import com.amazonaws.auth.policy.Condition;
   import com.amazonaws.auth.policy.Policy;
   import com.amazonaws.auth.policy.Principal;
   import com.amazonaws.auth.policy.Resource;
   import com.amazonaws.auth.policy.Statement;
   import com.amazonaws.auth.policy.Statement.Effect;
   import com.amazonaws.auth.policy.actions.SQSActions;
   import com.amazonaws.services.sns.AmazonSNS;
   import com.amazonaws.services.sns.AmazonSNSClientBuilder;
   import com.amazonaws.services.sns.model.CreateTopicRequest;
   import com.amazonaws.services.sns.model.CreateTopicResult;
   import com.amazonaws.services.sqs.AmazonSQS;
   import com.amazonaws.services.sqs.AmazonSQSClientBuilder;
   import com.amazonaws.services.sqs.model.CreateQueueRequest;
   import com.amazonaws.services.sqs.model.Message;
   import com.amazonaws.services.sqs.model.QueueAttributeName;
   import com.amazonaws.services.sqs.model.SetQueueAttributesRequest;
   import com.amazonaws.services.textract.AmazonTextract;
   import com.amazonaws.services.textract.AmazonTextractClientBuilder;
   import com.amazonaws.services.textract.model.Block;
   import com.amazonaws.services.textract.model.DocumentLocation;
   import com.amazonaws.services.textract.model.DocumentMetadata;
   import com.amazonaws.services.textract.model.GetDocumentAnalysisRequest;
   import com.amazonaws.services.textract.model.GetDocumentAnalysisResult;
   import com.amazonaws.services.textract.model.GetDocumentTextDetectionRequest;
   import com.amazonaws.services.textract.model.GetDocumentTextDetectionResult;
   import com.amazonaws.services.textract.model.NotificationChannel;
   import com.amazonaws.services.textract.model.Relationship;
   import com.amazonaws.services.textract.model.S3Object;
   import com.amazonaws.services.textract.model.StartDocumentAnalysisRequest;
   import com.amazonaws.services.textract.model.StartDocumentAnalysisResult;
   import com.amazonaws.services.textract.model.StartDocumentTextDetectionRequest;
   import com.amazonaws.services.textract.model.StartDocumentTextDetectionResult;
   import com.fasterxml.jackson.databind.JsonNode;
   import com.fasterxml.jackson.databind.ObjectMapper;;
   public class DocumentProcessor {
   
       private static String sqsQueueName=null;
       private static String snsTopicName=null;
       private static String snsTopicArn = null;
       private static String roleArn= null;
       private static String sqsQueueUrl = null;
       private static String sqsQueueArn = null;
       private static String startJobId = null;
       private static String bucket = null;
       private static String document = null; 
       private static AmazonSQS sqs=null;
       private static AmazonSNS sns=null;
       private static AmazonTextract textract = null;
   
       public enum ProcessType {
           DETECTION,ANALYSIS
       }
   
       public static void main(String[] args) throws Exception {
           
           String document = "document";
           String bucket = "bucket";
           String roleArn="role";
   
           sns = AmazonSNSClientBuilder.defaultClient();
           sqs= AmazonSQSClientBuilder.defaultClient();
           textract=AmazonTextractClientBuilder.defaultClient();
           
           CreateTopicandQueue();
           ProcessDocument(bucket,document,roleArn,ProcessType.DETECTION);
           DeleteTopicandQueue();
           System.out.println("Done!");
           
           
       }
       // Creates an SNS topic and SQS queue. The queue is subscribed to the topic. 
       static void CreateTopicandQueue()
       {
           //create a new SNS topic
           snsTopicName="AmazonTextractTopic" + Long.toString(System.currentTimeMillis());
           CreateTopicRequest createTopicRequest = new CreateTopicRequest(snsTopicName);
           CreateTopicResult createTopicResult = sns.createTopic(createTopicRequest);
           snsTopicArn=createTopicResult.getTopicArn();
           
           //Create a new SQS Queue
           sqsQueueName="AmazonTextractQueue" + Long.toString(System.currentTimeMillis());
           final CreateQueueRequest createQueueRequest = new CreateQueueRequest(sqsQueueName);
           sqsQueueUrl = sqs.createQueue(createQueueRequest).getQueueUrl();
           sqsQueueArn = sqs.getQueueAttributes(sqsQueueUrl, Arrays.asList("QueueArn")).getAttributes().get("QueueArn");
           
           //Subscribe SQS queue to SNS topic
           String sqsSubscriptionArn = sns.subscribe(snsTopicArn, "sqs", sqsQueueArn).getSubscriptionArn();
           
           // Authorize queue
             Policy policy = new Policy().withStatements(
                     new Statement(Effect.Allow)
                     .withPrincipals(Principal.AllUsers)
                     .withActions(SQSActions.SendMessage)
                     .withResources(new Resource(sqsQueueArn))
                     .withConditions(new Condition().withType("ArnEquals").withConditionKey("aws:SourceArn").withValues(snsTopicArn))
                     );
                     
   
             Map queueAttributes = new HashMap();
             queueAttributes.put(QueueAttributeName.Policy.toString(), policy.toJson());
             sqs.setQueueAttributes(new SetQueueAttributesRequest(sqsQueueUrl, queueAttributes)); 
             
   
            System.out.println("Topic arn: " + snsTopicArn);
            System.out.println("Queue arn: " + sqsQueueArn);
            System.out.println("Queue url: " + sqsQueueUrl);
            System.out.println("Queue sub arn: " + sqsSubscriptionArn );
        }
       static void DeleteTopicandQueue()
       {
           if (sqs !=null) {
               sqs.deleteQueue(sqsQueueUrl);
               System.out.println("SQS queue deleted");
           }
           
           if (sns!=null) {
               sns.deleteTopic(snsTopicArn);
               System.out.println("SNS topic deleted");
           }
       }
       
       //Starts the processing of the input document.
       static void ProcessDocument(String inBucket, String inDocument, String inRoleArn, ProcessType type) throws Exception
       {
           bucket=inBucket;
           document=inDocument;
           roleArn=inRoleArn;
   
           switch(type)
           {
               case DETECTION:
                   StartDocumentTextDetection(bucket, document);
                   System.out.println("Processing type: Detection");
                   break;
               case ANALYSIS:
                   StartDocumentAnalysis(bucket,document);
                   System.out.println("Processing type: Analysis");
                   break;
               default:
                   System.out.println("Invalid processing type. Choose Detection or Analysis");
                   throw new Exception("Invalid processing type");
              
           }
   
           System.out.println("Waiting for job: " + startJobId);
           //Poll queue for messages
           List<Message> messages=null;
           int dotLine=0;
           boolean jobFound=false;
   
           //loop until the job status is published. Ignore other messages in queue.
           do{
               messages = sqs.receiveMessage(sqsQueueUrl).getMessages();
               if (dotLine++<40){
                   System.out.print(".");
               }else{
                   System.out.println();
                   dotLine=0;
               }
   
               if (!messages.isEmpty()) {
                   //Loop through messages received.
                   for (Message message: messages) {
                       String notification = message.getBody();
   
                       // Get status and job id from notification.
                       ObjectMapper mapper = new ObjectMapper();
                       JsonNode jsonMessageTree = mapper.readTree(notification);
                       JsonNode messageBodyText = jsonMessageTree.get("Message");
                       ObjectMapper operationResultMapper = new ObjectMapper();
                       JsonNode jsonResultTree = operationResultMapper.readTree(messageBodyText.textValue());
                       JsonNode operationJobId = jsonResultTree.get("JobId");
                       JsonNode operationStatus = jsonResultTree.get("Status");
                       System.out.println("Job found was " + operationJobId);
                       // Found job. Get the results and display.
                       if(operationJobId.asText().equals(startJobId)){
                           jobFound=true;
                           System.out.println("Job id: " + operationJobId );
                           System.out.println("Status : " + operationStatus.toString());
                           if (operationStatus.asText().equals("SUCCEEDED")){
                               switch(type)
                               {
                                   case DETECTION:
                                       GetDocumentTextDetectionResults();
                                       break;
                                   case ANALYSIS:
                                       GetDocumentAnalysisResults();
                                       break;
                                   default:
                                       System.out.println("Invalid processing type. Choose Detection or Analysis");
                                       throw new Exception("Invalid processing type");
                                  
                               }
                           }
                           else{
                               System.out.println("Document analysis failed");
                           }
   
                           sqs.deleteMessage(sqsQueueUrl,message.getReceiptHandle());
                       }
   
                       else{
                           System.out.println("Job received was not job " +  startJobId);
                           //Delete unknown message. Consider moving message to dead letter queue
                           sqs.deleteMessage(sqsQueueUrl,message.getReceiptHandle());
                       }
                   }
               }
               else {
                   Thread.sleep(5000);
               }
           } while (!jobFound);
   
           System.out.println("Finished processing document");
       }
       
       private static void StartDocumentTextDetection(String bucket, String document) throws Exception{
   
           //Create notification channel 
           NotificationChannel channel= new NotificationChannel()
                   .withSNSTopicArn(snsTopicArn)
                   .withRoleArn(roleArn);
   
           StartDocumentTextDetectionRequest req = new StartDocumentTextDetectionRequest()
                   .withDocumentLocation(new DocumentLocation()
                       .withS3Object(new S3Object()
                           .withBucket(bucket)
                           .withName(document)))
                   .withJobTag("DetectingText")
                   .withNotificationChannel(channel);
   
           StartDocumentTextDetectionResult startDocumentTextDetectionResult = textract.startDocumentTextDetection(req);
           startJobId=startDocumentTextDetectionResult.getJobId();
       }
       
     //Gets the results of processing started by StartDocumentTextDetection
       private static void GetDocumentTextDetectionResults() throws Exception{
           int maxResults=1000;
           String paginationToken=null;
           GetDocumentTextDetectionResult response=null;
           Boolean finished=false;
           
           while (finished==false)
           {
               GetDocumentTextDetectionRequest documentTextDetectionRequest= new GetDocumentTextDetectionRequest()
                       .withJobId(startJobId)
                       .withMaxResults(maxResults)
                       .withNextToken(paginationToken);
               response = textract.getDocumentTextDetection(documentTextDetectionRequest);
               DocumentMetadata documentMetaData=response.getDocumentMetadata();
   
               System.out.println("Pages: " + documentMetaData.getPages().toString());
               
               //Show blocks information
               List<Block> blocks= response.getBlocks();
               for (Block block : blocks) {
                   DisplayBlockInfo(block);
               }
               paginationToken=response.getNextToken();
               if (paginationToken==null)
                   finished=true;
               
           }
           
       }
   
       private static void StartDocumentAnalysis(String bucket, String document) throws Exception{
           //Create notification channel 
           NotificationChannel channel= new NotificationChannel()
                   .withSNSTopicArn(snsTopicArn)
                   .withRoleArn(roleArn);
           
           StartDocumentAnalysisRequest req = new StartDocumentAnalysisRequest()
                   .withFeatureTypes("TABLES","FORMS")
                   .withDocumentLocation(new DocumentLocation()
                       .withS3Object(new S3Object()
                           .withBucket(bucket)
                           .withName(document)))
                   .withJobTag("AnalyzingText")
                   .withNotificationChannel(channel);
   
           StartDocumentAnalysisResult startDocumentAnalysisResult = textract.startDocumentAnalysis(req);
           startJobId=startDocumentAnalysisResult.getJobId();
       }
       //Gets the results of processing started by StartDocumentAnalysis
       private static void GetDocumentAnalysisResults() throws Exception{
   
           int maxResults=1000;
           String paginationToken=null;
           GetDocumentAnalysisResult response=null;
           Boolean finished=false;
           
           //loops until pagination token is null
           while (finished==false)
           {
               GetDocumentAnalysisRequest documentAnalysisRequest= new GetDocumentAnalysisRequest()
                       .withJobId(startJobId)
                       .withMaxResults(maxResults)
                       .withNextToken(paginationToken);
               
               response = textract.getDocumentAnalysis(documentAnalysisRequest);
   
               DocumentMetadata documentMetaData=response.getDocumentMetadata();
   
               System.out.println("Pages: " + documentMetaData.getPages().toString());
   
               //Show blocks, confidence and detection times
               List<Block> blocks= response.getBlocks();
   
               for (Block block : blocks) {
                   DisplayBlockInfo(block);
               }
               paginationToken=response.getNextToken();
               if (paginationToken==null)
                   finished=true;
           }
   
       }
       //Displays Block information for text detection and text analysis
       private static void DisplayBlockInfo(Block block) {
           System.out.println("Block Id : " + block.getId());
           if (block.getText()!=null)
               System.out.println("\tDetected text: " + block.getText());
           System.out.println("\tType: " + block.getBlockType());
           
           if (block.getBlockType().equals("PAGE") !=true) {
               System.out.println("\tConfidence: " + block.getConfidence().toString());
           }
           if(block.getBlockType().equals("CELL"))
           {
               System.out.println("\tCell information:");
               System.out.println("\t\tColumn: " + block.getColumnIndex());
               System.out.println("\t\tRow: " + block.getRowIndex());
               System.out.println("\t\tColumn span: " + block.getColumnSpan());
               System.out.println("\t\tRow span: " + block.getRowSpan());
   
           }
           
           System.out.println("\tRelationships");
           List<Relationship> relationships=block.getRelationships();
           if(relationships!=null) {
               for (Relationship relationship : relationships) {
                   System.out.println("\t\tType: " + relationship.getType());
                   System.out.println("\t\tIDs: " + relationship.getIds().toString());
               }
           } else {
               System.out.println("\t\tNo related Blocks");
           }
   
           System.out.println("\tGeometry");
           System.out.println("\t\tBounding Box: " + block.getGeometry().getBoundingBox().toString());
           System.out.println("\t\tPolygon: " + block.getGeometry().getPolygon().toString());
           
           List<String> entityTypes = block.getEntityTypes();
           
           System.out.println("\tEntity Types");
           if(entityTypes!=null) {
               for (String entityType : entityTypes) {
                   System.out.println("\t\tEntity Type: " + entityType);
               }
           } else {
               System.out.println("\t\tNo entity type");
           }
           
           if(block.getBlockType().equals("SELECTION_ELEMENT")) {
               System.out.print("    Selection element detected: ");
               if (block.getSelectionStatus().equals("SELECTED")){
                   System.out.println("Selected");
               }else {
                   System.out.println(" Not selected");
               }
           }
           if(block.getPage()!=null)
               System.out.println("\tPage: " + block.getPage());            
           System.out.println();
       }
   }
   

   AWS CLI

   EsteAWS CLIinicia la detección asincrónica del texto de un documento especificado. Este método devuelve un objetojob-idque se puede utilizar para recuperar los resultados de la detección.

   aws textract start-document-text-detection --document-location 
   "{\"S3Object\":{\"Bucket\":\"bucket-name\",\"Name\":\"file-name\"}}" --region region-name

   EsteAWS CLIdevuelve los resultados de una operación asíncrona de Amazon Textract cuando se proporciona con unjob-id.

   aws textract get-document-text-detection --region region-name --job-id job-id-number

   Si está accediendo a la CLI en un dispositivo Windows, utilice comillas dobles en lugar de comillas simples y escapa de las comillas dobles internas mediante barra invertida (es decir,\) para corregir cualquier error de analizador que pueda surgir. Para un ejemplo, consulte lo siguiente

   aws textract start-document-text-detection --document-location "{\"S3Object\":{\"Bucket\":\"bucket\",\"Name\":\"document\"}}" --region region-name

   Python

   import boto3
   import json
   import sys
   import time
   
   
   class ProcessType:
       DETECTION = 1
       ANALYSIS = 2
   
   
   class DocumentProcessor:
       jobId = ''
       region_name = ''
   
       roleArn = ''
       bucket = ''
       document = ''
   
       sqsQueueUrl = ''
       snsTopicArn = ''
       processType = ''
   
       def __init__(self, role, bucket, document, region):
           self.roleArn = role
           self.bucket = bucket
           self.document = document
           self.region_name = region
   
           self.textract = boto3.client('textract', region_name=self.region_name)
           self.sqs = boto3.client('sqs')
           self.sns = boto3.client('sns')
   
       def ProcessDocument(self, type):
           jobFound = False
   
           self.processType = type
           validType = False
   
           # Determine which type of processing to perform
           if self.processType == ProcessType.DETECTION:
               response = self.textract.start_document_text_detection(
                   DocumentLocation={'S3Object': {'Bucket': self.bucket, 'Name': self.document}},
                   NotificationChannel={'RoleArn': self.roleArn, 'SNSTopicArn': self.snsTopicArn})
               print('Processing type: Detection')
               validType = True
   
           if self.processType == ProcessType.ANALYSIS:
               response = self.textract.start_document_analysis(
                   DocumentLocation={'S3Object': {'Bucket': self.bucket, 'Name': self.document}},
                   FeatureTypes=["TABLES", "FORMS"],
                   NotificationChannel={'RoleArn': self.roleArn, 'SNSTopicArn': self.snsTopicArn})
               print('Processing type: Analysis')
               validType = True
   
           if validType == False:
               print("Invalid processing type. Choose Detection or Analysis.")
               return
   
           print('Start Job Id: ' + response['JobId'])
           dotLine = 0
           while jobFound == False:
               sqsResponse = self.sqs.receive_message(QueueUrl=self.sqsQueueUrl, MessageAttributeNames=['ALL'],
                                                      MaxNumberOfMessages=10)
   
               if sqsResponse:
   
                   if 'Messages' not in sqsResponse:
                       if dotLine < 40:
                           print('.', end='')
                           dotLine = dotLine + 1
                       else:
                           print()
                           dotLine = 0
                       sys.stdout.flush()
                       time.sleep(5)
                       continue
   
                   for message in sqsResponse['Messages']:
                       notification = json.loads(message['Body'])
                       textMessage = json.loads(notification['Message'])
                       print(textMessage['JobId'])
                       print(textMessage['Status'])
                       if str(textMessage['JobId']) == response['JobId']:
                           print('Matching Job Found:' + textMessage['JobId'])
                           jobFound = True
                           self.GetResults(textMessage['JobId'])
                           self.sqs.delete_message(QueueUrl=self.sqsQueueUrl,
                                                   ReceiptHandle=message['ReceiptHandle'])
                       else:
                           print("Job didn't match:" +
                                 str(textMessage['JobId']) + ' : ' + str(response['JobId']))
                       # Delete the unknown message. Consider sending to dead letter queue
                       self.sqs.delete_message(QueueUrl=self.sqsQueueUrl,
                                               ReceiptHandle=message['ReceiptHandle'])
   
           print('Done!')
   
       def CreateTopicandQueue(self):
   
           millis = str(int(round(time.time() * 1000)))
   
           # Create SNS topic
           snsTopicName = "AmazonTextractTopic" + millis
   
           topicResponse = self.sns.create_topic(Name=snsTopicName)
           self.snsTopicArn = topicResponse['TopicArn']
   
           # create SQS queue
           sqsQueueName = "AmazonTextractQueue" + millis
           self.sqs.create_queue(QueueName=sqsQueueName)
           self.sqsQueueUrl = self.sqs.get_queue_url(QueueName=sqsQueueName)['QueueUrl']
   
           attribs = self.sqs.get_queue_attributes(QueueUrl=self.sqsQueueUrl,
                                                   AttributeNames=['QueueArn'])['Attributes']
   
           sqsQueueArn = attribs['QueueArn']
   
           # Subscribe SQS queue to SNS topic
           self.sns.subscribe(
               TopicArn=self.snsTopicArn,
               Protocol='sqs',
               Endpoint=sqsQueueArn)
   
           # Authorize SNS to write SQS queue
           policy = """{{
     "Version":"2012-10-17",
     "Statement":[
       {{
         "Sid":"MyPolicy",
         "Effect":"Allow",
         "Principal" : {{"AWS" : "*"}},
         "Action":"SQS:SendMessage",
         "Resource": "{}",
         "Condition":{{
           "ArnEquals":{{
             "aws:SourceArn": "{}"
           }}
         }}
       }}
     ]
   }}""".format(sqsQueueArn, self.snsTopicArn)
   
           response = self.sqs.set_queue_attributes(
               QueueUrl=self.sqsQueueUrl,
               Attributes={
                   'Policy': policy
               })
   
       def DeleteTopicandQueue(self):
           self.sqs.delete_queue(QueueUrl=self.sqsQueueUrl)
           self.sns.delete_topic(TopicArn=self.snsTopicArn)
   
       # Display information about a block
       def DisplayBlockInfo(self, block):
   
           print("Block Id: " + block['Id'])
           print("Type: " + block['BlockType'])
           if 'EntityTypes' in block:
               print('EntityTypes: {}'.format(block['EntityTypes']))
   
           if 'Text' in block:
               print("Text: " + block['Text'])
   
           if block['BlockType'] != 'PAGE':
               print("Confidence: " + "{:.2f}".format(block['Confidence']) + "%")
   
           print('Page: {}'.format(block['Page']))
   
           if block['BlockType'] == 'CELL':
               print('Cell Information')
               print('\tColumn: {} '.format(block['ColumnIndex']))
               print('\tRow: {}'.format(block['RowIndex']))
               print('\tColumn span: {} '.format(block['ColumnSpan']))
               print('\tRow span: {}'.format(block['RowSpan']))
   
               if 'Relationships' in block:
                   print('\tRelationships: {}'.format(block['Relationships']))
   
           print('Geometry')
           print('\tBounding Box: {}'.format(block['Geometry']['BoundingBox']))
           print('\tPolygon: {}'.format(block['Geometry']['Polygon']))
   
           if block['BlockType'] == 'SELECTION_ELEMENT':
               print('    Selection element detected: ', end='')
               if block['SelectionStatus'] == 'SELECTED':
                   print('Selected')
               else:
                   print('Not selected')
   
       def GetResults(self, jobId):
           maxResults = 1000
           paginationToken = None
           finished = False
   
           while finished == False:
   
               response = None
   
               if self.processType == ProcessType.ANALYSIS:
                   if paginationToken == None:
                       response = self.textract.get_document_analysis(JobId=jobId,
                                                                      MaxResults=maxResults)
                   else:
                       response = self.textract.get_document_analysis(JobId=jobId,
                                                                      MaxResults=maxResults,
                                                                      NextToken=paginationToken)
   
               if self.processType == ProcessType.DETECTION:
                   if paginationToken == None:
                       response = self.textract.get_document_text_detection(JobId=jobId,
                                                                            MaxResults=maxResults)
                   else:
                       response = self.textract.get_document_text_detection(JobId=jobId,
                                                                            MaxResults=maxResults,
                                                                            NextToken=paginationToken)
   
               blocks = response['Blocks']
               print('Detected Document Text')
               print('Pages: {}'.format(response['DocumentMetadata']['Pages']))
   
               # Display block information
               for block in blocks:
                   self.DisplayBlockInfo(block)
                   print()
                   print()
   
               if 'NextToken' in response:
                   paginationToken = response['NextToken']
               else:
                   finished = True
   
       def GetResultsDocumentAnalysis(self, jobId):
           maxResults = 1000
           paginationToken = None
           finished = False
   
           while finished == False:
   
               response = None
               if paginationToken == None:
                   response = self.textract.get_document_analysis(JobId=jobId,
                                                                  MaxResults=maxResults)
               else:
                   response = self.textract.get_document_analysis(JobId=jobId,
                                                                  MaxResults=maxResults,
                                                                  NextToken=paginationToken)
   
                   # Get the text blocks
               blocks = response['Blocks']
               print('Analyzed Document Text')
               print('Pages: {}'.format(response['DocumentMetadata']['Pages']))
               # Display block information
               for block in blocks:
                   self.DisplayBlockInfo(block)
                   print()
                   print()
   
                   if 'NextToken' in response:
                       paginationToken = response['NextToken']
                   else:
                       finished = True
   
   
   def main():
       roleArn = ''
       bucket = ''
       document = ''
       region_name = ''
   
       analyzer = DocumentProcessor(roleArn, bucket, document, region_name)
       analyzer.CreateTopicandQueue()
       analyzer.ProcessDocument(ProcessType.DETECTION)
       analyzer.DeleteTopicandQueue()
   
   
   if __name__ == "__main__":
       main()

   Node.JS

   En este ejemplo, reemplace el valor deroleArncon el ARN del rol de IAM que ha guardado enConceder acceso a Amazon Textract a su tema de Amazon SNS. Sustituir los valores debucketydocumentcon el nombre del bucket de y el nombre del archivo de documento que especificó en el paso 2 anterior. Sustituir el valor deprocessTypecon el tipo de procesamiento que quieres utilizar en el documento de entrada. Por último, sustituya el valor deREGIONcon la región en la que opera su cliente.

    // snippet-start:[sqs.JavaScript.queues.createQueueV3]
   // Import required AWS SDK clients and commands for Node.js
   import { CreateQueueCommand, GetQueueAttributesCommand, GetQueueUrlCommand, 
       SetQueueAttributesCommand, DeleteQueueCommand, ReceiveMessageCommand, DeleteMessageCommand } from  "@aws-sdk/client-sqs";
     import {CreateTopicCommand, SubscribeCommand, DeleteTopicCommand } from "@aws-sdk/client-sns";
     import  { SQSClient } from "@aws-sdk/client-sqs";
     import  { SNSClient } from "@aws-sdk/client-sns";
     import  { TextractClient, StartDocumentTextDetectionCommand, StartDocumentAnalysisCommand, GetDocumentAnalysisCommand, GetDocumentTextDetectionCommand, DocumentMetadata } from "@aws-sdk/client-textract";
     import { stdout } from "process";
     
     // Set the AWS Region.
     const REGION = "us-east-1"; //e.g. "us-east-1"
     // Create SNS service object.
     const sqsClient = new SQSClient({ region: REGION });
     const snsClient = new SNSClient({ region: REGION });
     const textractClient = new TextractClient({ region: REGION });
     
     // Set bucket and video variables
     const bucket = "bucket-name";                                                                                                                  
     const documentName = "document-name";
     const roleArn = "role-arn"
     const processType = "DETECTION"
     var startJobId = ""
     
     var ts = Date.now();
     const snsTopicName = "AmazonTextractExample" + ts;
     const snsTopicParams = {Name: snsTopicName}
     const sqsQueueName = "AmazonTextractQueue-" + ts;
   
     // Set the parameters
     const sqsParams = {
       QueueName: sqsQueueName, //SQS_QUEUE_URL
       Attributes: {
         DelaySeconds: "60", // Number of seconds delay.
         MessageRetentionPeriod: "86400", // Number of seconds delay.
       },
     };
     
     // Process a document based on operation type
     const processDocumment = async (type, bucket, videoName, roleArn, sqsQueueUrl, snsTopicArn) =>
       {
       try
       {
           // Set job found and success status to false initially
         var jobFound = false
         var succeeded = false
         var dotLine = 0
         var processType = type
         var validType = false
   
         if (processType == "DETECTION"){
           var response = await textractClient.send(new StartDocumentTextDetectionCommand({DocumentLocation:{S3Object:{Bucket:bucket, Name:videoName}}, 
             NotificationChannel:{RoleArn: roleArn, SNSTopicArn: snsTopicArn}}))
           console.log("Processing type: Detection")
           validType = true
         }
   
         if (processType == "ANALYSIS"){
           var response = await textractClient.send(new StartDocumentAnalysisCommand({DocumentLocation:{S3Object:{Bucket:bucket, Name:videoName}}, 
             NotificationChannel:{RoleArn: roleArn, SNSTopicArn: snsTopicArn}}))
           console.log("Processing type: Analysis")
           validType = true
         }
   
         if (validType == false){
             console.log("Invalid processing type. Choose Detection or Analysis.")
             return
         }
       // while not found, continue to poll for response
       console.log(`Start Job ID: ${response.JobId}`)
       while (jobFound == false){
         var sqsReceivedResponse = await sqsClient.send(new ReceiveMessageCommand({QueueUrl:sqsQueueUrl, 
           MaxNumberOfMessages:'ALL', MaxNumberOfMessages:10}));
         if (sqsReceivedResponse){
           var responseString = JSON.stringify(sqsReceivedResponse)
           if (!responseString.includes('Body')){
             if (dotLine < 40) {
               console.log('.')
               dotLine = dotLine + 1
             }else {
               console.log('')
               dotLine = 0 
             };
             stdout.write('', () => {
               console.log('');
             });
             await new Promise(resolve => setTimeout(resolve, 5000));
             continue
           }
         }
   
           // Once job found, log Job ID and return true if status is succeeded
           for (var message of sqsReceivedResponse.Messages){
               console.log("Retrieved messages:")
               var notification = JSON.parse(message.Body)
               var rekMessage = JSON.parse(notification.Message)
               var messageJobId = rekMessage.JobId
               if (String(rekMessage.JobId).includes(String(startJobId))){
                   console.log('Matching job found:')
                   console.log(rekMessage.JobId)
                   jobFound = true
                   // GET RESUlTS FUNCTION HERE
                   var operationResults = await GetResults(processType, rekMessage.JobId)
                   //GET RESULTS FUMCTION HERE
                   console.log(rekMessage.Status)
               if (String(rekMessage.Status).includes(String("SUCCEEDED"))){
                   succeeded = true
                   console.log("Job processing succeeded.")
                   var sqsDeleteMessage = await sqsClient.send(new DeleteMessageCommand({QueueUrl:sqsQueueUrl, ReceiptHandle:message.ReceiptHandle}));
               }
               }else{
               console.log("Provided Job ID did not match returned ID.")
               var sqsDeleteMessage = await sqsClient.send(new DeleteMessageCommand({QueueUrl:sqsQueueUrl, ReceiptHandle:message.ReceiptHandle}));
               }
           }
   
       console.log("Done!")
       }
       }catch (err) {
           console.log("Error", err);
         }
     }
   
     // Create the SNS topic and SQS Queue
     const createTopicandQueue = async () => {
       try {
         // Create SNS topic
         const topicResponse = await snsClient.send(new CreateTopicCommand(snsTopicParams));
         const topicArn = topicResponse.TopicArn
         console.log("Success", topicResponse);
         // Create SQS Queue
         const sqsResponse = await sqsClient.send(new CreateQueueCommand(sqsParams));
         console.log("Success", sqsResponse);
         const sqsQueueCommand = await sqsClient.send(new GetQueueUrlCommand({QueueName: sqsQueueName}))
         const sqsQueueUrl = sqsQueueCommand.QueueUrl
         const attribsResponse = await sqsClient.send(new GetQueueAttributesCommand({QueueUrl: sqsQueueUrl, AttributeNames: ['QueueArn']}))
         const attribs = attribsResponse.Attributes
         console.log(attribs)
         const queueArn = attribs.QueueArn
         // subscribe SQS queue to SNS topic
         const subscribed = await snsClient.send(new SubscribeCommand({TopicArn: topicArn, Protocol:'sqs', Endpoint: queueArn}))
         const policy = {
           Version: "2012-10-17",
           Statement: [
             {
               Sid: "MyPolicy",
               Effect: "Allow",
               Principal: {AWS: "*"},
               Action: "SQS:SendMessage",
               Resource: queueArn,
               Condition: {
                 ArnEquals: {
                   'aws:SourceArn': topicArn
                 }
               }
             }
           ]
         };
     
         const response = sqsClient.send(new SetQueueAttributesCommand({QueueUrl: sqsQueueUrl, Attributes: {Policy: JSON.stringify(policy)}}))
         console.log(response)
         console.log(sqsQueueUrl, topicArn)
         return [sqsQueueUrl, topicArn]
     
       } catch (err) {
         console.log("Error", err);
   
       }
     }
   
     const deleteTopicAndQueue = async (sqsQueueUrlArg, snsTopicArnArg) => {
       const deleteQueue = await sqsClient.send(new DeleteQueueCommand({QueueUrl: sqsQueueUrlArg}));
       const deleteTopic = await snsClient.send(new DeleteTopicCommand({TopicArn: snsTopicArnArg}));
       console.log("Successfully deleted.")
     }
   
     const displayBlockInfo = async (block) => {
       console.log(`Block ID: ${block.Id}`)
       console.log(`Block Type: ${block.BlockType}`)
       if (String(block).includes(String("EntityTypes"))){
           console.log(`EntityTypes: ${block.EntityTypes}`)
       }
       if (String(block).includes(String("Text"))){
           console.log(`EntityTypes: ${block.Text}`)
       }
       if (!String(block.BlockType).includes('PAGE')){
           console.log(`Confidence: ${block.Confidence}`)
       }
       console.log(`Page: ${block.Page}`)
       if (String(block.BlockType).includes("CELL")){
           console.log("Cell Information")
           console.log(`Column: ${block.ColumnIndex}`)
           console.log(`Row: ${block.RowIndex}`)
           console.log(`Column Span: ${block.ColumnSpan}`)
           console.log(`Row Span: ${block.RowSpan}`)
           if (String(block).includes("Relationships")){
               console.log(`Relationships: ${block.Relationships}`)
           }
       }
   
       console.log("Geometry")
       console.log(`Bounding Box: ${JSON.stringify(block.Geometry.BoundingBox)}`)
       console.log(`Polygon: ${JSON.stringify(block.Geometry.Polygon)}`)
   
       if (String(block.BlockType).includes('SELECTION_ELEMENT')){
         console.log('Selection Element detected:')
         if (String(block.SelectionStatus).includes('SELECTED')){
           console.log('Selected')
         } else {
           console.log('Not Selected')
         }
   
       }
     }
   
     const GetResults = async (processType, JobID) => {
   
       var maxResults = 1000
       var paginationToken = null
       var finished = false
   
       while (finished == false){
         var response = null
         if (processType == 'ANALYSIS'){
           if (paginationToken == null){
             response = textractClient.send(new GetDocumentAnalysisCommand({JobId:JobID, MaxResults:maxResults}))
         
           }else{
             response = textractClient.send(new GetDocumentAnalysisCommand({JobId:JobID, MaxResults:maxResults, NextToken:paginationToken}))
           }
         }
           
         if(processType == 'DETECTION'){
           if (paginationToken == null){
             response = textractClient.send(new GetDocumentTextDetectionCommand({JobId:JobID, MaxResults:maxResults}))
         
           }else{
             response = textractClient.send(new GetDocumentTextDetectionCommand({JobId:JobID, MaxResults:maxResults, NextToken:paginationToken}))
           }
         }
   
         await new Promise(resolve => setTimeout(resolve, 5000));
         console.log("Detected Documented Text")
         console.log(response)
         //console.log(Object.keys(response))
         console.log(typeof(response))
         var blocks = (await response).Blocks
         console.log(blocks)
         console.log(typeof(blocks))
         var docMetadata = (await response).DocumentMetadata
         var blockString = JSON.stringify(blocks)
         var parsed = JSON.parse(JSON.stringify(blocks))
         console.log(Object.keys(blocks))
         console.log(`Pages: ${docMetadata.Pages}`)
         blocks.forEach((block)=> {
           displayBlockInfo(block)
           console.log()
           console.log()
         })
   
         //console.log(blocks[0].BlockType)
         //console.log(blocks[1].BlockType)
   
   
         if(String(response).includes("NextToken")){
           paginationToken = response.NextToken
         }else{
           finished = true
         }
       }
   
     }
   
   
     // DELETE TOPIC AND QUEUE
     const main = async () => {
       var sqsAndTopic = await createTopicandQueue();
       var process = await processDocumment(processType, bucket, documentName, roleArn, sqsAndTopic[0], sqsAndTopic[1])
       var deleteResults = await deleteTopicAndQueue(sqsAndTopic[0], sqsAndTopic[1])
     }
   
   main()

4. Ejecute el código. La operación podría llevar algún tiempo. Una vez terminada, se muestra una lista de bloques para el texto detectado o analizado.