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verifyHeadersFrame() — netty Function Reference

Architecture documentation for the verifyHeadersFrame() function in DefaultHttp2FrameReader.java from the netty codebase.

Function java Buffer Allocators calls 2 called by 1

Entity Profile

Dependency Diagram

graph TD
  c3b18a68_fb1e_a250_383c_d5326174d526["verifyHeadersFrame()"]
  3768d640_58c2_34e7_3d69_a4b578e0d11a["DefaultHttp2FrameReader"]
  c3b18a68_fb1e_a250_383c_d5326174d526 -->|defined in| 3768d640_58c2_34e7_3d69_a4b578e0d11a
  80aaad85_d41e_97a8_6671_ac352891e88f["verifyFrameState()"]
  80aaad85_d41e_97a8_6671_ac352891e88f -->|calls| c3b18a68_fb1e_a250_383c_d5326174d526
  d7ebd2c7_76fa_2887_bee9_3a9200630c77["verifyAssociatedWithAStream()"]
  c3b18a68_fb1e_a250_383c_d5326174d526 -->|calls| d7ebd2c7_76fa_2887_bee9_3a9200630c77
  069bb3c4_e0d2_3ec9_e70b_ad5573d3a4ad["verifyNotProcessingHeaders()"]
  c3b18a68_fb1e_a250_383c_d5326174d526 -->|calls| 069bb3c4_e0d2_3ec9_e70b_ad5573d3a4ad
  style c3b18a68_fb1e_a250_383c_d5326174d526 fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

codec-http2/src/main/java/io/netty/handler/codec/http2/DefaultHttp2FrameReader.java lines 289–301

    private void verifyHeadersFrame() throws Http2Exception {
        verifyAssociatedWithAStream();
        verifyNotProcessingHeaders();

        int requiredLength = flags.getPaddingPresenceFieldLength() + flags.getNumPriorityBytes();
        if (payloadLength < requiredLength) {
            // HEADER frames carry a field_block and thus failure to process them results
            // in HPACK corruption and renders the connection unusable.
            // See https://datatracker.ietf.org/doc/html/rfc9113#section-4.2 for details.
            throw connectionError(FRAME_SIZE_ERROR,
                    "Frame length %d too small for HEADERS frame with stream %d.", payloadLength, streamId);
        }
    }

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Frequently Asked Questions

What does verifyHeadersFrame() do?
verifyHeadersFrame() is a function in the netty codebase, defined in codec-http2/src/main/java/io/netty/handler/codec/http2/DefaultHttp2FrameReader.java.
Where is verifyHeadersFrame() defined?
verifyHeadersFrame() is defined in codec-http2/src/main/java/io/netty/handler/codec/http2/DefaultHttp2FrameReader.java at line 289.
What does verifyHeadersFrame() call?
verifyHeadersFrame() calls 2 function(s): verifyAssociatedWithAStream, verifyNotProcessingHeaders.
What calls verifyHeadersFrame()?
verifyHeadersFrame() is called by 1 function(s): verifyFrameState.

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