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68 changes: 68 additions & 0 deletions
68
...-java-container-core/src/main/java/com/amazonaws/serverless/proxy/internal/HttpUtils.java
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Original file line number | Diff line number | Diff line change |
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package com.amazonaws.serverless.proxy.internal; | ||
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import org.apache.commons.io.Charsets; | ||
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import java.nio.charset.Charset; | ||
import java.nio.charset.StandardCharsets; | ||
import java.nio.charset.UnsupportedCharsetException; | ||
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public final class HttpUtils { | ||
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static final String HEADER_KEY_VALUE_SEPARATOR = "="; | ||
static final String HEADER_VALUE_SEPARATOR = ";"; | ||
static final String ENCODING_VALUE_KEY = "charset"; | ||
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static public Charset parseCharacterEncoding(String contentTypeHeader,Charset defaultCharset) { | ||
// we only look at content-type because content-encoding should only be used for | ||
// "binary" requests such as gzip/deflate. | ||
if (contentTypeHeader == null) { | ||
return defaultCharset; | ||
} | ||
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String[] contentTypeValues = contentTypeHeader.split(HEADER_VALUE_SEPARATOR); | ||
if (contentTypeValues.length <= 1) { | ||
return defaultCharset; | ||
} | ||
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for (String contentTypeValue : contentTypeValues) { | ||
if (contentTypeValue.trim().startsWith(ENCODING_VALUE_KEY)) { | ||
String[] encodingValues = contentTypeValue.split(HEADER_KEY_VALUE_SEPARATOR); | ||
if (encodingValues.length <= 1) { | ||
return defaultCharset; | ||
} | ||
try { | ||
return Charsets.toCharset(encodingValues[1]); | ||
} catch (UnsupportedCharsetException ex) { | ||
return defaultCharset; | ||
} | ||
} | ||
} | ||
return defaultCharset; | ||
} | ||
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static public String appendCharacterEncoding(String currentContentType, String newEncoding) { | ||
if (currentContentType == null || currentContentType.trim().isEmpty()) { | ||
return null; | ||
} | ||
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if (currentContentType.contains(HEADER_VALUE_SEPARATOR)) { | ||
String[] contentTypeValues = currentContentType.split(HEADER_VALUE_SEPARATOR); | ||
StringBuilder contentType = new StringBuilder(contentTypeValues[0]); | ||
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for (int i = 1; i < contentTypeValues.length; i++) { | ||
String contentTypeValue = contentTypeValues[i]; | ||
String contentTypeString = HEADER_VALUE_SEPARATOR + " " + contentTypeValue; | ||
if (contentTypeValue.trim().startsWith(ENCODING_VALUE_KEY)) { | ||
contentTypeString = HEADER_VALUE_SEPARATOR + " " + ENCODING_VALUE_KEY + HEADER_KEY_VALUE_SEPARATOR + newEncoding; | ||
} | ||
contentType.append(contentTypeString); | ||
} | ||
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return contentType.toString(); | ||
} else { | ||
return currentContentType + HEADER_VALUE_SEPARATOR + " " + ENCODING_VALUE_KEY + HEADER_KEY_VALUE_SEPARATOR + newEncoding; | ||
} | ||
} | ||
} |
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