splitHeader() — netty Function Reference

Architecture documentation for the splitHeader() function in HttpServerUpgradeHandler.java from the netty codebase.

Function java ProtocolCodecs HTTP called by 1

Entity Profile

ProtocolCodecs→ HTTP→ splitHeader() — netty Function Reference

Dependency Diagram

graph TD
  c68ee1f2_acba_ff86_bef6_328b183214dd["splitHeader()"]
  9c8c1840_4e39_0876_abe2_bb3ce8067466["HttpServerUpgradeHandler"]
  c68ee1f2_acba_ff86_bef6_328b183214dd -->|defined in| 9c8c1840_4e39_0876_abe2_bb3ce8067466
  149aae54_88df_d06f_7ef6_3a140cffc9ad["upgrade()"]
  149aae54_88df_d06f_7ef6_3a140cffc9ad -->|calls| c68ee1f2_acba_ff86_bef6_328b183214dd
  style c68ee1f2_acba_ff86_bef6_328b183214dd fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

codec-http/src/main/java/io/netty/handler/codec/http/HttpServerUpgradeHandler.java lines 472–496

    private static List<CharSequence> splitHeader(CharSequence header) {
        final StringBuilder builder = new StringBuilder(header.length());
        final List<CharSequence> protocols = new ArrayList<CharSequence>(4);
        for (int i = 0; i < header.length(); ++i) {
            char c = header.charAt(i);
            if (Character.isWhitespace(c)) {
                // Don't include any whitespace.
                continue;
            }
            if (c == ',') {
                // Add the string and reset the builder for the next protocol.
                protocols.add(builder.toString());
                builder.setLength(0);
            } else {
                builder.append(c);
            }
        }

        // Add the last protocol
        if (builder.length() > 0) {
            protocols.add(builder.toString());
        }

        return protocols;
    }