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String() — netty Function Reference

Architecture documentation for the String() function in WebSocketExtensionUtil.java from the netty codebase.

Function java ProtocolCodecs HTTP calls 1

Entity Profile

Dependency Diagram

graph TD
  2a5c1014_65bf_067f_f094_5a28f0180f9a["String()"]
  36acf548_12c0_7c6a_f443_4b411d0a25e8["WebSocketExtensionUtil"]
  2a5c1014_65bf_067f_f094_5a28f0180f9a -->|defined in| 36acf548_12c0_7c6a_f443_4b411d0a25e8
  9b18588e_5a2b_146d_9573_0d4226f7c5f3["extractExtensions()"]
  2a5c1014_65bf_067f_f094_5a28f0180f9a -->|calls| 9b18588e_5a2b_146d_9573_0d4226f7c5f3
  style 2a5c1014_65bf_067f_f094_5a28f0180f9a fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

codec-http/src/main/java/io/netty/handler/codec/http/websocketx/extensions/WebSocketExtensionUtil.java lines 75–122

    static String computeMergeExtensionsHeaderValue(String userDefinedHeaderValue,
                                                    List<WebSocketExtensionData> extraExtensions) {
        List<WebSocketExtensionData> userDefinedExtensions =
          userDefinedHeaderValue != null ?
            extractExtensions(userDefinedHeaderValue) :
            Collections.emptyList();

        for (WebSocketExtensionData userDefined: userDefinedExtensions) {
            WebSocketExtensionData matchingExtra = null;
            int i;
            for (i = 0; i < extraExtensions.size(); i ++) {
                WebSocketExtensionData extra = extraExtensions.get(i);
                if (extra.name().equals(userDefined.name())) {
                    matchingExtra = extra;
                    break;
                }
            }
            if (matchingExtra == null) {
                extraExtensions.add(userDefined);
            } else {
                // merge with higher precedence to user defined parameters
                Map<String, String> mergedParameters = new LinkedHashMap<String, String>(matchingExtra.parameters());
                mergedParameters.putAll(userDefined.parameters());
                extraExtensions.set(i, new WebSocketExtensionData(matchingExtra.name(), mergedParameters));
            }
        }

        StringBuilder sb = new StringBuilder(150);

        for (WebSocketExtensionData data: extraExtensions) {
            sb.append(data.name());
            for (Entry<String, String> parameter : data.parameters().entrySet()) {
                sb.append(PARAMETER_SEPARATOR);
                sb.append(parameter.getKey());
                if (parameter.getValue() != null) {
                    sb.append(PARAMETER_EQUAL);
                    sb.append(parameter.getValue());
                }
            }
            sb.append(EXTENSION_SEPARATOR);
        }

        if (!extraExtensions.isEmpty()) {
            sb.setLength(sb.length() - EXTENSION_SEPARATOR.length());
        }

        return sb.toString();
    }

Domain

Subdomains

Defined In

Calls

Source

Frequently Asked Questions

What does String() do?
String() is a function in the netty codebase, defined in codec-http/src/main/java/io/netty/handler/codec/http/websocketx/extensions/WebSocketExtensionUtil.java.
Where is String() defined?
String() is defined in codec-http/src/main/java/io/netty/handler/codec/http/websocketx/extensions/WebSocketExtensionUtil.java at line 75.
What does String() call?
String() calls 1 function(s): extractExtensions.

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