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# 适用于 C\$1\$1 的 AWS SDK 中提供的实用程序模块
<a name="utility-modules"></a>

适用于 C\$1\$1 的 AWS SDK 包括许多[实用程序模块](https://docs.aws.amazon.com/sdk-for-cpp/latest/api/aws-cpp-sdk-core/html/namespace_aws_1_1_utils.html)，用于降低使用 C\$1\$1 开发 AWS 应用程序的复杂性。

## HTTP 堆栈
<a name="http-stack"></a>

提供连接池的 HTTP 堆栈是线程安全的，可以根据需要重用。有关更多信息，请参阅[AWS 客户端配置](client-config.md)。


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|  标头  |   [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 文档  |   [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)   | 

## 字符串实用程序
<a name="string-utils"></a>

核心字符串函数，例如 `trim`、`lowercase` 和数字转换。


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|  标题  |   [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 文档  |   [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)   | 

## 哈希实用程序
<a name="hashing-utils"></a>

哈希函数，例如 `SHA256`、`MD5`、`Base64` 和 `SHA256_HMAC`。


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| --- |--- |
|  标题  |   [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 文档  |   [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 解析器
<a name="json-parser"></a>

一个功能齐全但轻量级的 JSON 解析器（对 *`cJSON`* 的薄封装）。


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|  标题  |   [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 文档  |   [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 解析器
<a name="xml-parser"></a>

一个轻量级 XML 解析器（对 *`tinyxml2`* 的一层薄封装）。[RAII 模式](http://en.cppreference.com/w/cpp/language/raii)已添加到接口中。


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|  |  | 
| --- |--- |
|  标题  |   [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 文档  |   [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)   |