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Exemplos do Amazon Polly usando o script AWS CLI Bash - AWS Exemplos de código do SDK
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Há mais exemplos de AWS SDK disponíveis no repositório AWS Doc SDK Examples GitHub .

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Exemplos do Amazon Polly usando o script AWS CLI Bash

Os exemplos de código a seguir mostram como realizar ações e implementar cenários comuns usando o script AWS Command Line Interface with Bash com Amazon Polly.

Cenários são exemplos de código que mostram como realizar tarefas específicas chamando várias funções dentro de um serviço ou combinadas com outros Serviços da AWS.

Cada exemplo inclui um link para o código-fonte completo, em que você pode encontrar instruções sobre como configurar e executar o código.

Tópicos

Cenários

O exemplo de código a seguir mostra como:

  • Limpar os recursos

AWS CLI com script Bash
nota

Tem mais sobre GitHub. Encontre o exemplo completo e saiba como configurar e executar no repositório Sample developer tutorials. 

#!/bin/bash

# Amazon Polly Getting Started Script
# This script demonstrates how to use Amazon Polly with the AWS CLI

set -euo pipefail

# Set up logging
LOG_FILE="polly-tutorial.log"
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
WORK_DIR=$(mktemp -d)
trap 'cleanup_temp' EXIT

cleanup_temp() {
    rm -rf "$WORK_DIR"
}

echo "Starting Amazon Polly tutorial at $(date)" > "$LOG_FILE"

# Function to log commands and their output
log_cmd() {
    echo "Running: $1" | tee -a "$LOG_FILE"
    # Use bash array to safely handle arguments
    bash -c "$1" 2>&1 | tee -a "$LOG_FILE" || return $?
}

# Function to check for errors
check_error() {
    if echo "$1" | grep -iq "error"; then
        echo "ERROR detected in output. Exiting script." | tee -a "$LOG_FILE"
        echo "$1" | tee -a "$LOG_FILE"
        return 1
    fi
    return 0
}

# Function to handle errors and cleanup
handle_error() {
    local line_number=$1
    echo "Error occurred at line $line_number. Attempting cleanup..." | tee -a "$LOG_FILE"
    cleanup
    exit 1
}

# Function to clean up resources
cleanup() {
    echo "" | tee -a "$LOG_FILE"
    echo "===========================================================" | tee -a "$LOG_FILE"
    echo "CLEANUP PROCESS" | tee -a "$LOG_FILE"
    echo "===========================================================" | tee -a "$LOG_FILE"
    
    # Delete lexicon if it exists
    if [[ -n "${LEXICON_NAME:-}" ]]; then
        echo "Deleting lexicon: $LEXICON_NAME" | tee -a "$LOG_FILE"
        if aws polly delete-lexicon --name "$LEXICON_NAME" 2>&1 | tee -a "$LOG_FILE"; then
            echo "Lexicon deleted successfully." | tee -a "$LOG_FILE"
        else
            echo "Warning: Failed to delete lexicon." | tee -a "$LOG_FILE"
        fi
    fi
    
    # Remove audio files
    for file in output.mp3 ssml-output.mp3 lexicon-output.mp3 example.pls; do
        if [[ -f "$file" ]]; then
            rm -f "$file"
            echo "Removed $file" | tee -a "$LOG_FILE"
        fi
    done
    
    echo "Cleanup complete." | tee -a "$LOG_FILE"
}

# Trap errors with line number
trap 'handle_error ${LINENO}' ERR

# Verify AWS CLI is available
if ! command -v aws &> /dev/null; then
    echo "AWS CLI is not installed. Please install it first." | tee -a "$LOG_FILE"
    exit 1
fi

# Verify AWS credentials are configured
if ! aws sts get-caller-identity &> /dev/null; then
    echo "AWS credentials are not configured. Please configure them first." | tee -a "$LOG_FILE"
    exit 1
fi

# Step 1: Verify Amazon Polly is available
echo "Step 1: Verifying Amazon Polly availability" | tee -a "$LOG_FILE"
if aws polly describe-voices --query 'Voices[0].Name' --output text &> /dev/null; then
    echo "Amazon Polly is available. Proceeding with tutorial." | tee -a "$LOG_FILE"
else
    echo "Amazon Polly is not available in your AWS CLI installation or region." | tee -a "$LOG_FILE"
    echo "Please update your AWS CLI to the latest version or check your region." | tee -a "$LOG_FILE"
    exit 1
fi

# Step 2: List available voices
echo "" | tee -a "$LOG_FILE"
echo "Step 2: Listing available voices" | tee -a "$LOG_FILE"
log_cmd "aws polly describe-voices --language-code en-US --output text --query 'Voices[0:3].[Id, LanguageCode, Gender]'" || true

# Step 3: Basic text-to-speech conversion
echo "" | tee -a "$LOG_FILE"
echo "Step 3: Converting text to speech" | tee -a "$LOG_FILE"
OUTPUT_FILE="${WORK_DIR}/output.mp3"
POLLY_TEXT="Hello, welcome to Amazon Polly. This is a sample text to speech conversion."
log_cmd "aws polly synthesize-speech --output-format mp3 --voice-id Joanna --text '$POLLY_TEXT' '$OUTPUT_FILE'" || true

if [[ -f "$OUTPUT_FILE" ]]; then
    echo "Successfully created output.mp3 file." | tee -a "$LOG_FILE"
    echo "You can play this file with your preferred audio player." | tee -a "$LOG_FILE"
    cp "$OUTPUT_FILE" output.mp3
else
    echo "Failed to create output.mp3 file." | tee -a "$LOG_FILE"
    exit 1
fi

# Step 4: Using SSML for enhanced speech
echo "" | tee -a "$LOG_FILE"
echo "Step 4: Using SSML for enhanced speech" | tee -a "$LOG_FILE"
SSML_OUTPUT="${WORK_DIR}/ssml-output.mp3"
SSML_TEXT='<speak>Hello! <break time="1s"/> This is a sample of <emphasis>SSML enhanced speech</emphasis>.</speak>'
log_cmd "aws polly synthesize-speech --output-format mp3 --voice-id Matthew --text-type ssml --text '$SSML_TEXT' '$SSML_OUTPUT'" || true

if [[ -f "$SSML_OUTPUT" ]]; then
    echo "Successfully created ssml-output.mp3 file." | tee -a "$LOG_FILE"
    echo "You can play this file with your preferred audio player." | tee -a "$LOG_FILE"
    cp "$SSML_OUTPUT" ssml-output.mp3
else
    echo "Failed to create ssml-output.mp3 file." | tee -a "$LOG_FILE"
    exit 1
fi

# Step 5: Working with lexicons
echo "" | tee -a "$LOG_FILE"
echo "Step 5: Working with lexicons" | tee -a "$LOG_FILE"

# Generate a random identifier for the lexicon (max 20 chars, alphanumeric only)
LEXICON_NAME="example$(openssl rand -hex 6 | cut -c 1-10)"
echo "Using lexicon name: $LEXICON_NAME" | tee -a "$LOG_FILE"

# Create a lexicon file
echo "Creating lexicon file..." | tee -a "$LOG_FILE"
LEXICON_FILE="${WORK_DIR}/example.pls"
cat > "$LEXICON_FILE" << 'EOF'
<?xml version="1.0" encoding="UTF-8"?>
<lexicon version="1.0" 
      xmlns="http://www.w3.org/2005/01/pronunciation-lexicon"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
      xsi:schemaLocation="http://www.w3.org/2005/01/pronunciation-lexicon 
        http://www.w3.org/TR/2007/CR-pronunciation-lexicon-20071212/pls.xsd"
      alphabet="ipa" 
      xml:lang="en-US">
  <lexeme>
    <grapheme>AWS</grapheme>
    <alias>Amazon Web Services</alias>
  </lexeme>
</lexicon>
EOF

# Upload the lexicon
echo "Uploading lexicon..." | tee -a "$LOG_FILE"
LEXICON_ARN=$(aws polly put-lexicon --name "$LEXICON_NAME" --content file://"$LEXICON_FILE" --query 'LexiconArn' --output text 2>&1) || true
if [[ -n "$LEXICON_ARN" && "$LEXICON_ARN" != "" && ! "$LEXICON_ARN" =~ error ]]; then
    echo "Lexicon uploaded with ARN: $LEXICON_ARN" | tee -a "$LOG_FILE"
    aws polly tag-resource --resource-arn "$LEXICON_ARN" --tags Key=project,Value=doc-smith Key=tutorial,Value=amazon-polly-gs 2>&1 | tee -a "$LOG_FILE" || true
else
    echo "Lexicon uploaded." | tee -a "$LOG_FILE"
fi

# List available lexicons
echo "Listing available lexicons..." | tee -a "$LOG_FILE"
log_cmd "aws polly list-lexicons --output text --query 'Lexicons[*].[Name]'" || true

# Get details about the lexicon
echo "Getting details about the lexicon..." | tee -a "$LOG_FILE"
log_cmd "aws polly get-lexicon --name '$LEXICON_NAME' --output text --query 'Lexicon.Name'" || true

# Use the lexicon when synthesizing speech
echo "Using the lexicon for speech synthesis..." | tee -a "$LOG_FILE"
LEXICON_OUTPUT="${WORK_DIR}/lexicon-output.mp3"
LEXICON_TEXT="I work with AWS every day."
log_cmd "aws polly synthesize-speech --output-format mp3 --voice-id Joanna --lexicon-names '$LEXICON_NAME' --text '$LEXICON_TEXT' '$LEXICON_OUTPUT'" || true

if [[ -f "$LEXICON_OUTPUT" ]]; then
    echo "Successfully created lexicon-output.mp3 file." | tee -a "$LOG_FILE"
    echo "You can play this file with your preferred audio player." | tee -a "$LOG_FILE"
    cp "$LEXICON_OUTPUT" lexicon-output.mp3
else
    echo "Failed to create lexicon-output.mp3 file." | tee -a "$LOG_FILE"
    exit 1
fi

# Summary of created resources
echo "" | tee -a "$LOG_FILE"
echo "===========================================================" | tee -a "$LOG_FILE"
echo "TUTORIAL SUMMARY" | tee -a "$LOG_FILE"
echo "===========================================================" | tee -a "$LOG_FILE"
echo "Created resources:" | tee -a "$LOG_FILE"
echo "1. Lexicon: $LEXICON_NAME" | tee -a "$LOG_FILE"
echo "2. Audio files:" | tee -a "$LOG_FILE"
echo "   - output.mp3" | tee -a "$LOG_FILE"
echo "   - ssml-output.mp3" | tee -a "$LOG_FILE"
echo "   - lexicon-output.mp3" | tee -a "$LOG_FILE"
echo "" | tee -a "$LOG_FILE"

# Cleanup with auto-confirmation
echo "" | tee -a "$LOG_FILE"
echo "===========================================================" | tee -a "$LOG_FILE"
echo "CLEANUP CONFIRMATION" | tee -a "$LOG_FILE"
echo "===========================================================" | tee -a "$LOG_FILE"
echo "Cleaning up all created resources..." | tee -a "$LOG_FILE"
cleanup

echo "" | tee -a "$LOG_FILE"
echo "Tutorial completed successfully!" | tee -a "$LOG_FILE"
echo "Log file: $LOG_FILE" | tee -a "$LOG_FILE"