# Utility modules available in the AWS SDK for C\$1\$1
<a name="utility-modules"></a>

The AWS SDK for C\$1\$1 includes many [utility modules](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-core/html/namespace_aws_1_1_utils.html) to reduce the complexity of developing AWS applications in C\$1\$1.

## HTTP Stack
<a name="http-stack"></a>

An HTTP stack that provides connection pooling, is thread-safe, and can be reused as you need. For more information, see [AWS Client Configuration](client-config.md).


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|  Headers  |   [https://github.com/aws/aws-sdk-cpp/tree/master/aws-cpp-sdk-core/include/aws/core/http](https://github.com/aws/aws-sdk-cpp/tree/master/aws-cpp-sdk-core/include/aws/core/http)   | 
|  API Documentation  |   [https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-core/html/namespace_aws_1_1_http.html](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-core/html/namespace_aws_1_1_http.html)   | 

## String Utils
<a name="string-utils"></a>

Core string functions, such as `trim`, `lowercase`, and numeric conversions.


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|  Header  |   [https://github.com/aws/aws-sdk-cpp/tree/master/aws-cpp-sdk-core/include/aws/core/utils/StringUtils.h](https://github.com/aws/aws-sdk-cpp/tree/master/aws-cpp-sdk-core/include/aws/core/utils/StringUtils.h)   | 
|  API Documentation  |   [https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-core/html/class_aws_1_1_utils_1_1_string_utils.html](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-core/html/class_aws_1_1_utils_1_1_string_utils.html)   | 

## Hashing Utils
<a name="hashing-utils"></a>

Hashing functions such as `SHA256`, `MD5`, `Base64`, and `SHA256_HMAC`.


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|  Header  |   [https://github.com/aws/aws-sdk-cpp/tree/master/aws-cpp-sdk-core/include/aws/core/utils/HashingUtils.h](https://github.com/aws/aws-sdk-cpp/tree/master/aws-cpp-sdk-core/include/aws/core/utils/HashingUtils.h)   | 
|  API Documentation  |   [https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-core/html/class_aws_1_1_utils_1_1_hashing_utils.html](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-core/html/class_aws_1_1_utils_1_1_hashing_utils.html)   | 

## JSON Parser
<a name="json-parser"></a>

A fully functioning yet lightweight JSON parser (a thin wrapper around *`cJSON`*).


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|  Header  |   [https://github.com/aws/aws-sdk-cpp/tree/master/aws-cpp-sdk-core/include/aws/core/utils/json/JsonSerializer.h](https://github.com/aws/aws-sdk-cpp/tree/master/aws-cpp-sdk-core/include/aws/core/utils/json/JsonSerializer.h)   | 
|  API Documentation  |   [https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-core/html/class_aws_1_1_utils_1_1_json_1_1_json_value.html](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-core/html/class_aws_1_1_utils_1_1_json_1_1_json_value.html)   | 

## XML Parser
<a name="xml-parser"></a>

A lightweight XML parser (a thin wrapper around *`tinyxml2`*). The [RAII pattern](http://en.cppreference.com/w/cpp/language/raii) has been added to the interface.


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|  |  | 
| --- |--- |
|  Header  |   [https://github.com/aws/aws-sdk-cpp/tree/master/aws-cpp-sdk-core/include/aws/core/utils/xml/XmlSerializer.h](https://github.com/aws/aws-sdk-cpp/tree/master/aws-cpp-sdk-core/include/aws/core/utils/xml/XmlSerializer.h)   | 
|  API Documentation  |   [https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-core/html/namespace_aws_1_1_utils_1_1_xml.html](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-core/html/namespace_aws_1_1_utils_1_1_xml.html)   |