Change to debug logging for header values

Summary: Changing to debug logging for HTTP header values due to privacy implications.

Reviewed By: hanidamlaj

Differential Revision: D70581133

fbshipit-source-id: 66ff86702d9b45717d2af8df4f1debe7b85058c2

Author: Joanna Jo

proxygen/lib/http/codec/HQStreamCodec.cpp

@@ -196,7 +196,7 @@ void HQStreamCodec::onHeadersComplete(HTTPHeaderSize decodedSize,
     LOG(ERROR) << "Failed parsing header list for stream=" << streamId_
                << ", error=" << decodeInfo_.parsingError;
     if (!decodeInfo_.headerErrorValue.empty()) {
-      std::cerr << " value=" << decodeInfo_.headerErrorValue << std::endl;
+      DVLOG(4) << " value=" << decodeInfo_.headerErrorValue;
     }
     HTTPException err(
         HTTPException::Direction::INGRESS,

proxygen/lib/http/codec/HTTP1xCodec.cpp

@@ -908,7 +908,7 @@ bool HTTP1xCodec::pushHeaderNameAndValue(HTTPHeaders& hdrs) {
             compatValidate ? CodecUtil::CtlEscapeMode::STRICT_COMPAT
                            : CodecUtil::CtlEscapeMode::STRICT)) {
       LOG(ERROR) << "Invalid header name=" << headerName;
-      std::cerr << " value=" << currentHeaderValue_ << std::endl;
+      DVLOG(4) << " value=" << currentHeaderValue_;
       return false;
     }
   }

proxygen/lib/http/codec/HTTP2Codec.cpp

@@ -622,7 +622,7 @@ HTTP2Codec::parseHeadersDecodeFrames(
     LOG(ERROR) << "Failed parsing header list for stream=" << curHeader_.stream
                << ", error=" << decodeInfo_.parsingError;
     if (!decodeInfo_.headerErrorValue.empty()) {
-      std::cerr << " value=" << decodeInfo_.headerErrorValue << std::endl;
+      DVLOG(4) << " value=" << decodeInfo_.headerErrorValue;
     }
     VLOG(3) << "Header block="
             << IOBufPrinter::printHexFolly(curHeaderBlock_.front(), true);